Annotation of embedaddon/ntp/lib/isc/unix/socket.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
! 3: * Copyright (C) 1998-2003 Internet Software Consortium.
! 4: *
! 5: * Permission to use, copy, modify, and/or distribute this software for any
! 6: * purpose with or without fee is hereby granted, provided that the above
! 7: * copyright notice and this permission notice appear in all copies.
! 8: *
! 9: * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
! 10: * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
! 11: * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
! 12: * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
! 13: * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
! 14: * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
! 15: * PERFORMANCE OF THIS SOFTWARE.
! 16: */
! 17:
! 18: /* $Id: socket.c,v 1.308.12.8 2009/04/18 01:29:26 jinmei Exp $ */
! 19:
! 20: /*! \file */
! 21:
! 22: #include <config.h>
! 23:
! 24: #include <sys/param.h>
! 25: #include <sys/types.h>
! 26: #include <sys/socket.h>
! 27: #include <sys/stat.h>
! 28: #include <sys/time.h>
! 29: #include <sys/uio.h>
! 30:
! 31: #include <errno.h>
! 32: #include <fcntl.h>
! 33: #include <stddef.h>
! 34: #include <stdlib.h>
! 35: #include <string.h>
! 36: #include <unistd.h>
! 37:
! 38: #include <isc/buffer.h>
! 39: #include <isc/bufferlist.h>
! 40: #include <isc/condition.h>
! 41: #include <isc/formatcheck.h>
! 42: #include <isc/list.h>
! 43: #include <isc/log.h>
! 44: #include <isc/mem.h>
! 45: #include <isc/msgs.h>
! 46: #include <isc/mutex.h>
! 47: #include <isc/net.h>
! 48: #include <isc/once.h>
! 49: #include <isc/platform.h>
! 50: #include <isc/print.h>
! 51: #include <isc/region.h>
! 52: #include <isc/socket.h>
! 53: #include <isc/stats.h>
! 54: #include <isc/strerror.h>
! 55: #include <isc/task.h>
! 56: #include <isc/thread.h>
! 57: #include <isc/util.h>
! 58: #include <isc/xml.h>
! 59:
! 60: #ifdef ISC_PLATFORM_HAVESYSUNH
! 61: #include <sys/un.h>
! 62: #endif
! 63: #ifdef ISC_PLATFORM_HAVEKQUEUE
! 64: #include <sys/event.h>
! 65: #endif
! 66: #ifdef ISC_PLATFORM_HAVEEPOLL
! 67: #include <sys/epoll.h>
! 68: #endif
! 69: #ifdef ISC_PLATFORM_HAVEDEVPOLL
! 70: #include <sys/devpoll.h>
! 71: #endif
! 72:
! 73: #include "errno2result.h"
! 74:
! 75: #ifndef ISC_PLATFORM_USETHREADS
! 76: #include "socket_p.h"
! 77: #endif /* ISC_PLATFORM_USETHREADS */
! 78:
! 79: #if defined(SO_BSDCOMPAT) && defined(__linux__)
! 80: #include <sys/utsname.h>
! 81: #endif
! 82:
! 83: /*%
! 84: * Choose the most preferable multiplex method.
! 85: */
! 86: #ifdef ISC_PLATFORM_HAVEKQUEUE
! 87: #define USE_KQUEUE
! 88: #elif defined (ISC_PLATFORM_HAVEEPOLL)
! 89: #define USE_EPOLL
! 90: #elif defined (ISC_PLATFORM_HAVEDEVPOLL)
! 91: #define USE_DEVPOLL
! 92: typedef struct {
! 93: unsigned int want_read : 1,
! 94: want_write : 1;
! 95: } pollinfo_t;
! 96: #else
! 97: #define USE_SELECT
! 98: #endif /* ISC_PLATFORM_HAVEKQUEUE */
! 99:
! 100: #ifndef ISC_PLATFORM_USETHREADS
! 101: #if defined(USE_KQUEUE) || defined(USE_EPOLL) || defined(USE_DEVPOLL)
! 102: struct isc_socketwait {
! 103: int nevents;
! 104: };
! 105: #elif defined (USE_SELECT)
! 106: struct isc_socketwait {
! 107: fd_set *readset;
! 108: fd_set *writeset;
! 109: int nfds;
! 110: int maxfd;
! 111: };
! 112: #endif /* USE_KQUEUE */
! 113: #endif /* !ISC_PLATFORM_USETHREADS */
! 114:
! 115: /*%
! 116: * Maximum number of allowable open sockets. This is also the maximum
! 117: * allowable socket file descriptor.
! 118: *
! 119: * Care should be taken before modifying this value for select():
! 120: * The API standard doesn't ensure select() accept more than (the system default
! 121: * of) FD_SETSIZE descriptors, and the default size should in fact be fine in
! 122: * the vast majority of cases. This constant should therefore be increased only
! 123: * when absolutely necessary and possible, i.e., the server is exhausting all
! 124: * available file descriptors (up to FD_SETSIZE) and the select() function
! 125: * and FD_xxx macros support larger values than FD_SETSIZE (which may not
! 126: * always by true, but we keep using some of them to ensure as much
! 127: * portability as possible). Note also that overall server performance
! 128: * may be rather worsened with a larger value of this constant due to
! 129: * inherent scalability problems of select().
! 130: *
! 131: * As a special note, this value shouldn't have to be touched if
! 132: * this is a build for an authoritative only DNS server.
! 133: */
! 134: #ifndef ISC_SOCKET_MAXSOCKETS
! 135: #if defined(USE_KQUEUE) || defined(USE_EPOLL) || defined(USE_DEVPOLL)
! 136: #define ISC_SOCKET_MAXSOCKETS 4096
! 137: #elif defined(USE_SELECT)
! 138: #define ISC_SOCKET_MAXSOCKETS FD_SETSIZE
! 139: #endif /* USE_KQUEUE... */
! 140: #endif /* ISC_SOCKET_MAXSOCKETS */
! 141:
! 142: #ifdef USE_SELECT
! 143: /*%
! 144: * Mac OS X needs a special definition to support larger values in select().
! 145: * We always define this because a larger value can be specified run-time.
! 146: */
! 147: #ifdef __APPLE__
! 148: #define _DARWIN_UNLIMITED_SELECT
! 149: #endif /* __APPLE__ */
! 150: #endif /* USE_SELECT */
! 151:
! 152: #ifdef ISC_SOCKET_USE_POLLWATCH
! 153: /*%
! 154: * If this macro is defined, enable workaround for a Solaris /dev/poll kernel
! 155: * bug: DP_POLL ioctl could keep sleeping even if socket I/O is possible for
! 156: * some of the specified FD. The idea is based on the observation that it's
! 157: * likely for a busy server to keep receiving packets. It specifically works
! 158: * as follows: the socket watcher is first initialized with the state of
! 159: * "poll_idle". While it's in the idle state it keeps sleeping until a socket
! 160: * event occurs. When it wakes up for a socket I/O event, it moves to the
! 161: * poll_active state, and sets the poll timeout to a short period
! 162: * (ISC_SOCKET_POLLWATCH_TIMEOUT msec). If timeout occurs in this state, the
! 163: * watcher goes to the poll_checking state with the same timeout period.
! 164: * In this state, the watcher tries to detect whether this is a break
! 165: * during intermittent events or the kernel bug is triggered. If the next
! 166: * polling reports an event within the short period, the previous timeout is
! 167: * likely to be a kernel bug, and so the watcher goes back to the active state.
! 168: * Otherwise, it moves to the idle state again.
! 169: *
! 170: * It's not clear whether this is a thread-related bug, but since we've only
! 171: * seen this with threads, this workaround is used only when enabling threads.
! 172: */
! 173:
! 174: typedef enum { poll_idle, poll_active, poll_checking } pollstate_t;
! 175:
! 176: #ifndef ISC_SOCKET_POLLWATCH_TIMEOUT
! 177: #define ISC_SOCKET_POLLWATCH_TIMEOUT 10
! 178: #endif /* ISC_SOCKET_POLLWATCH_TIMEOUT */
! 179: #endif /* ISC_SOCKET_USE_POLLWATCH */
! 180:
! 181: /*%
! 182: * Size of per-FD lock buckets.
! 183: */
! 184: #ifdef ISC_PLATFORM_USETHREADS
! 185: #define FDLOCK_COUNT 1024
! 186: #define FDLOCK_ID(fd) ((fd) % FDLOCK_COUNT)
! 187: #else
! 188: #define FDLOCK_COUNT 1
! 189: #define FDLOCK_ID(fd) 0
! 190: #endif /* ISC_PLATFORM_USETHREADS */
! 191:
! 192: /*%
! 193: * Maximum number of events communicated with the kernel. There should normally
! 194: * be no need for having a large number.
! 195: */
! 196: #if defined(USE_KQUEUE) || defined(USE_EPOLL) || defined(USE_DEVPOLL)
! 197: #ifndef ISC_SOCKET_MAXEVENTS
! 198: #define ISC_SOCKET_MAXEVENTS 64
! 199: #endif
! 200: #endif
! 201:
! 202: /*%
! 203: * Some systems define the socket length argument as an int, some as size_t,
! 204: * some as socklen_t. This is here so it can be easily changed if needed.
! 205: */
! 206: #ifndef ISC_SOCKADDR_LEN_T
! 207: #define ISC_SOCKADDR_LEN_T unsigned int
! 208: #endif
! 209:
! 210: /*%
! 211: * Define what the possible "soft" errors can be. These are non-fatal returns
! 212: * of various network related functions, like recv() and so on.
! 213: *
! 214: * For some reason, BSDI (and perhaps others) will sometimes return <0
! 215: * from recv() but will have errno==0. This is broken, but we have to
! 216: * work around it here.
! 217: */
! 218: #define SOFT_ERROR(e) ((e) == EAGAIN || \
! 219: (e) == EWOULDBLOCK || \
! 220: (e) == EINTR || \
! 221: (e) == 0)
! 222:
! 223: #define DLVL(x) ISC_LOGCATEGORY_GENERAL, ISC_LOGMODULE_SOCKET, ISC_LOG_DEBUG(x)
! 224:
! 225: /*!<
! 226: * DLVL(90) -- Function entry/exit and other tracing.
! 227: * DLVL(70) -- Socket "correctness" -- including returning of events, etc.
! 228: * DLVL(60) -- Socket data send/receive
! 229: * DLVL(50) -- Event tracing, including receiving/sending completion events.
! 230: * DLVL(20) -- Socket creation/destruction.
! 231: */
! 232: #define TRACE_LEVEL 90
! 233: #define CORRECTNESS_LEVEL 70
! 234: #define IOEVENT_LEVEL 60
! 235: #define EVENT_LEVEL 50
! 236: #define CREATION_LEVEL 20
! 237:
! 238: #define TRACE DLVL(TRACE_LEVEL)
! 239: #define CORRECTNESS DLVL(CORRECTNESS_LEVEL)
! 240: #define IOEVENT DLVL(IOEVENT_LEVEL)
! 241: #define EVENT DLVL(EVENT_LEVEL)
! 242: #define CREATION DLVL(CREATION_LEVEL)
! 243:
! 244: typedef isc_event_t intev_t;
! 245:
! 246: #define SOCKET_MAGIC ISC_MAGIC('I', 'O', 'i', 'o')
! 247: #define VALID_SOCKET(t) ISC_MAGIC_VALID(t, SOCKET_MAGIC)
! 248:
! 249: /*!
! 250: * IPv6 control information. If the socket is an IPv6 socket we want
! 251: * to collect the destination address and interface so the client can
! 252: * set them on outgoing packets.
! 253: */
! 254: #ifdef ISC_PLATFORM_HAVEIN6PKTINFO
! 255: #ifndef USE_CMSG
! 256: #define USE_CMSG 1
! 257: #endif
! 258: #endif
! 259:
! 260: /*%
! 261: * NetBSD and FreeBSD can timestamp packets. XXXMLG Should we have
! 262: * a setsockopt() like interface to request timestamps, and if the OS
! 263: * doesn't do it for us, call gettimeofday() on every UDP receive?
! 264: */
! 265: #ifdef SO_TIMESTAMP
! 266: #ifndef USE_CMSG
! 267: #define USE_CMSG 1
! 268: #endif
! 269: #endif
! 270:
! 271: /*%
! 272: * The size to raise the receive buffer to (from BIND 8).
! 273: */
! 274: #define RCVBUFSIZE (32*1024)
! 275:
! 276: /*%
! 277: * The number of times a send operation is repeated if the result is EINTR.
! 278: */
! 279: #define NRETRIES 10
! 280:
! 281: struct isc_socket {
! 282: /* Not locked. */
! 283: unsigned int magic;
! 284: isc_socketmgr_t *manager;
! 285: isc_mutex_t lock;
! 286: isc_sockettype_t type;
! 287: const isc_statscounter_t *statsindex;
! 288:
! 289: /* Locked by socket lock. */
! 290: ISC_LINK(isc_socket_t) link;
! 291: unsigned int references;
! 292: int fd;
! 293: int pf;
! 294: char name[16];
! 295: void * tag;
! 296:
! 297: ISC_LIST(isc_socketevent_t) send_list;
! 298: ISC_LIST(isc_socketevent_t) recv_list;
! 299: ISC_LIST(isc_socket_newconnev_t) accept_list;
! 300: isc_socket_connev_t *connect_ev;
! 301:
! 302: /*
! 303: * Internal events. Posted when a descriptor is readable or
! 304: * writable. These are statically allocated and never freed.
! 305: * They will be set to non-purgable before use.
! 306: */
! 307: intev_t readable_ev;
! 308: intev_t writable_ev;
! 309:
! 310: isc_sockaddr_t peer_address; /* remote address */
! 311:
! 312: unsigned int pending_recv : 1,
! 313: pending_send : 1,
! 314: pending_accept : 1,
! 315: listener : 1, /* listener socket */
! 316: connected : 1,
! 317: connecting : 1, /* connect pending */
! 318: bound : 1; /* bound to local addr */
! 319:
! 320: #ifdef ISC_NET_RECVOVERFLOW
! 321: unsigned char overflow; /* used for MSG_TRUNC fake */
! 322: #endif
! 323:
! 324: char *recvcmsgbuf;
! 325: ISC_SOCKADDR_LEN_T recvcmsgbuflen;
! 326: char *sendcmsgbuf;
! 327: ISC_SOCKADDR_LEN_T sendcmsgbuflen;
! 328:
! 329: void *fdwatcharg;
! 330: isc_sockfdwatch_t fdwatchcb;
! 331: int fdwatchflags;
! 332: isc_task_t *fdwatchtask;
! 333: };
! 334:
! 335: #define SOCKET_MANAGER_MAGIC ISC_MAGIC('I', 'O', 'm', 'g')
! 336: #define VALID_MANAGER(m) ISC_MAGIC_VALID(m, SOCKET_MANAGER_MAGIC)
! 337:
! 338: struct isc_socketmgr {
! 339: /* Not locked. */
! 340: unsigned int magic;
! 341: isc_mem_t *mctx;
! 342: isc_mutex_t lock;
! 343: isc_mutex_t *fdlock;
! 344: isc_stats_t *stats;
! 345: #ifdef USE_KQUEUE
! 346: int kqueue_fd;
! 347: int nevents;
! 348: struct kevent *events;
! 349: #endif /* USE_KQUEUE */
! 350: #ifdef USE_EPOLL
! 351: int epoll_fd;
! 352: int nevents;
! 353: struct epoll_event *events;
! 354: #endif /* USE_EPOLL */
! 355: #ifdef USE_DEVPOLL
! 356: int devpoll_fd;
! 357: int nevents;
! 358: struct pollfd *events;
! 359: #endif /* USE_DEVPOLL */
! 360: #ifdef USE_SELECT
! 361: int fd_bufsize;
! 362: #endif /* USE_SELECT */
! 363: unsigned int maxsocks;
! 364: #ifdef ISC_PLATFORM_USETHREADS
! 365: int pipe_fds[2];
! 366: #endif
! 367:
! 368: /* Locked by fdlock. */
! 369: isc_socket_t **fds;
! 370: int *fdstate;
! 371: #ifdef USE_DEVPOLL
! 372: pollinfo_t *fdpollinfo;
! 373: #endif
! 374:
! 375: /* Locked by manager lock. */
! 376: ISC_LIST(isc_socket_t) socklist;
! 377: #ifdef USE_SELECT
! 378: fd_set *read_fds;
! 379: fd_set *read_fds_copy;
! 380: fd_set *write_fds;
! 381: fd_set *write_fds_copy;
! 382: int maxfd;
! 383: #endif /* USE_SELECT */
! 384: int reserved; /* unlocked */
! 385: #ifdef ISC_PLATFORM_USETHREADS
! 386: isc_thread_t watcher;
! 387: isc_condition_t shutdown_ok;
! 388: #else /* ISC_PLATFORM_USETHREADS */
! 389: unsigned int refs;
! 390: #endif /* ISC_PLATFORM_USETHREADS */
! 391: };
! 392:
! 393: #ifndef ISC_PLATFORM_USETHREADS
! 394: static isc_socketmgr_t *socketmgr = NULL;
! 395: #endif /* ISC_PLATFORM_USETHREADS */
! 396:
! 397: #define CLOSED 0 /* this one must be zero */
! 398: #define MANAGED 1
! 399: #define CLOSE_PENDING 2
! 400:
! 401: /*
! 402: * send() and recv() iovec counts
! 403: */
! 404: #define MAXSCATTERGATHER_SEND (ISC_SOCKET_MAXSCATTERGATHER)
! 405: #ifdef ISC_NET_RECVOVERFLOW
! 406: # define MAXSCATTERGATHER_RECV (ISC_SOCKET_MAXSCATTERGATHER + 1)
! 407: #else
! 408: # define MAXSCATTERGATHER_RECV (ISC_SOCKET_MAXSCATTERGATHER)
! 409: #endif
! 410:
! 411: static void send_recvdone_event(isc_socket_t *, isc_socketevent_t **);
! 412: static void send_senddone_event(isc_socket_t *, isc_socketevent_t **);
! 413: static void free_socket(isc_socket_t **);
! 414: static isc_result_t allocate_socket(isc_socketmgr_t *, isc_sockettype_t,
! 415: isc_socket_t **);
! 416: static void destroy(isc_socket_t **);
! 417: static void internal_accept(isc_task_t *, isc_event_t *);
! 418: static void internal_connect(isc_task_t *, isc_event_t *);
! 419: static void internal_recv(isc_task_t *, isc_event_t *);
! 420: static void internal_send(isc_task_t *, isc_event_t *);
! 421: static void internal_fdwatch_write(isc_task_t *, isc_event_t *);
! 422: static void internal_fdwatch_read(isc_task_t *, isc_event_t *);
! 423: static void process_cmsg(isc_socket_t *, struct msghdr *, isc_socketevent_t *);
! 424: static void build_msghdr_send(isc_socket_t *, isc_socketevent_t *,
! 425: struct msghdr *, struct iovec *, size_t *);
! 426: static void build_msghdr_recv(isc_socket_t *, isc_socketevent_t *,
! 427: struct msghdr *, struct iovec *, size_t *);
! 428: #ifdef ISC_PLATFORM_USETHREADS
! 429: static isc_boolean_t process_ctlfd(isc_socketmgr_t *manager);
! 430: #endif
! 431:
! 432: #define SELECT_POKE_SHUTDOWN (-1)
! 433: #define SELECT_POKE_NOTHING (-2)
! 434: #define SELECT_POKE_READ (-3)
! 435: #define SELECT_POKE_ACCEPT (-3) /*%< Same as _READ */
! 436: #define SELECT_POKE_WRITE (-4)
! 437: #define SELECT_POKE_CONNECT (-4) /*%< Same as _WRITE */
! 438: #define SELECT_POKE_CLOSE (-5)
! 439:
! 440: #define SOCK_DEAD(s) ((s)->references == 0)
! 441:
! 442: /*%
! 443: * Shortcut index arrays to get access to statistics counters.
! 444: */
! 445: enum {
! 446: STATID_OPEN = 0,
! 447: STATID_OPENFAIL = 1,
! 448: STATID_CLOSE = 2,
! 449: STATID_BINDFAIL = 3,
! 450: STATID_CONNECTFAIL = 4,
! 451: STATID_CONNECT = 5,
! 452: STATID_ACCEPTFAIL = 6,
! 453: STATID_ACCEPT = 7,
! 454: STATID_SENDFAIL = 8,
! 455: STATID_RECVFAIL = 9
! 456: };
! 457: static const isc_statscounter_t upd4statsindex[] = {
! 458: isc_sockstatscounter_udp4open,
! 459: isc_sockstatscounter_udp4openfail,
! 460: isc_sockstatscounter_udp4close,
! 461: isc_sockstatscounter_udp4bindfail,
! 462: isc_sockstatscounter_udp4connectfail,
! 463: isc_sockstatscounter_udp4connect,
! 464: -1,
! 465: -1,
! 466: isc_sockstatscounter_udp4sendfail,
! 467: isc_sockstatscounter_udp4recvfail
! 468: };
! 469: static const isc_statscounter_t upd6statsindex[] = {
! 470: isc_sockstatscounter_udp6open,
! 471: isc_sockstatscounter_udp6openfail,
! 472: isc_sockstatscounter_udp6close,
! 473: isc_sockstatscounter_udp6bindfail,
! 474: isc_sockstatscounter_udp6connectfail,
! 475: isc_sockstatscounter_udp6connect,
! 476: -1,
! 477: -1,
! 478: isc_sockstatscounter_udp6sendfail,
! 479: isc_sockstatscounter_udp6recvfail
! 480: };
! 481: static const isc_statscounter_t tcp4statsindex[] = {
! 482: isc_sockstatscounter_tcp4open,
! 483: isc_sockstatscounter_tcp4openfail,
! 484: isc_sockstatscounter_tcp4close,
! 485: isc_sockstatscounter_tcp4bindfail,
! 486: isc_sockstatscounter_tcp4connectfail,
! 487: isc_sockstatscounter_tcp4connect,
! 488: isc_sockstatscounter_tcp4acceptfail,
! 489: isc_sockstatscounter_tcp4accept,
! 490: isc_sockstatscounter_tcp4sendfail,
! 491: isc_sockstatscounter_tcp4recvfail
! 492: };
! 493: static const isc_statscounter_t tcp6statsindex[] = {
! 494: isc_sockstatscounter_tcp6open,
! 495: isc_sockstatscounter_tcp6openfail,
! 496: isc_sockstatscounter_tcp6close,
! 497: isc_sockstatscounter_tcp6bindfail,
! 498: isc_sockstatscounter_tcp6connectfail,
! 499: isc_sockstatscounter_tcp6connect,
! 500: isc_sockstatscounter_tcp6acceptfail,
! 501: isc_sockstatscounter_tcp6accept,
! 502: isc_sockstatscounter_tcp6sendfail,
! 503: isc_sockstatscounter_tcp6recvfail
! 504: };
! 505: static const isc_statscounter_t unixstatsindex[] = {
! 506: isc_sockstatscounter_unixopen,
! 507: isc_sockstatscounter_unixopenfail,
! 508: isc_sockstatscounter_unixclose,
! 509: isc_sockstatscounter_unixbindfail,
! 510: isc_sockstatscounter_unixconnectfail,
! 511: isc_sockstatscounter_unixconnect,
! 512: isc_sockstatscounter_unixacceptfail,
! 513: isc_sockstatscounter_unixaccept,
! 514: isc_sockstatscounter_unixsendfail,
! 515: isc_sockstatscounter_unixrecvfail
! 516: };
! 517: static const isc_statscounter_t fdwatchstatsindex[] = {
! 518: -1,
! 519: -1,
! 520: isc_sockstatscounter_fdwatchclose,
! 521: isc_sockstatscounter_fdwatchbindfail,
! 522: isc_sockstatscounter_fdwatchconnectfail,
! 523: isc_sockstatscounter_fdwatchconnect,
! 524: -1,
! 525: -1,
! 526: isc_sockstatscounter_fdwatchsendfail,
! 527: isc_sockstatscounter_fdwatchrecvfail
! 528: };
! 529:
! 530: static void
! 531: manager_log(isc_socketmgr_t *sockmgr,
! 532: isc_logcategory_t *category, isc_logmodule_t *module, int level,
! 533: const char *fmt, ...) ISC_FORMAT_PRINTF(5, 6);
! 534: static void
! 535: manager_log(isc_socketmgr_t *sockmgr,
! 536: isc_logcategory_t *category, isc_logmodule_t *module, int level,
! 537: const char *fmt, ...)
! 538: {
! 539: char msgbuf[2048];
! 540: va_list ap;
! 541:
! 542: if (! isc_log_wouldlog(isc_lctx, level))
! 543: return;
! 544:
! 545: va_start(ap, fmt);
! 546: vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap);
! 547: va_end(ap);
! 548:
! 549: isc_log_write(isc_lctx, category, module, level,
! 550: "sockmgr %p: %s", sockmgr, msgbuf);
! 551: }
! 552:
! 553: static void
! 554: socket_log(isc_socket_t *sock, isc_sockaddr_t *address,
! 555: isc_logcategory_t *category, isc_logmodule_t *module, int level,
! 556: isc_msgcat_t *msgcat, int msgset, int message,
! 557: const char *fmt, ...) ISC_FORMAT_PRINTF(9, 10);
! 558: static void
! 559: socket_log(isc_socket_t *sock, isc_sockaddr_t *address,
! 560: isc_logcategory_t *category, isc_logmodule_t *module, int level,
! 561: isc_msgcat_t *msgcat, int msgset, int message,
! 562: const char *fmt, ...)
! 563: {
! 564: char msgbuf[2048];
! 565: char peerbuf[ISC_SOCKADDR_FORMATSIZE];
! 566: va_list ap;
! 567:
! 568: if (! isc_log_wouldlog(isc_lctx, level))
! 569: return;
! 570:
! 571: va_start(ap, fmt);
! 572: vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap);
! 573: va_end(ap);
! 574:
! 575: if (address == NULL) {
! 576: isc_log_iwrite(isc_lctx, category, module, level,
! 577: msgcat, msgset, message,
! 578: "socket %p: %s", sock, msgbuf);
! 579: } else {
! 580: isc_sockaddr_format(address, peerbuf, sizeof(peerbuf));
! 581: isc_log_iwrite(isc_lctx, category, module, level,
! 582: msgcat, msgset, message,
! 583: "socket %p %s: %s", sock, peerbuf, msgbuf);
! 584: }
! 585: }
! 586:
! 587: #if defined(_AIX) && defined(ISC_NET_BSD44MSGHDR) && \
! 588: defined(USE_CMSG) && defined(IPV6_RECVPKTINFO)
! 589: /*
! 590: * AIX has a kernel bug where IPV6_RECVPKTINFO gets cleared by
! 591: * setting IPV6_V6ONLY.
! 592: */
! 593: static void
! 594: FIX_IPV6_RECVPKTINFO(isc_socket_t *sock)
! 595: {
! 596: char strbuf[ISC_STRERRORSIZE];
! 597: int on = 1;
! 598:
! 599: if (sock->pf != AF_INET6 || sock->type != isc_sockettype_udp)
! 600: return;
! 601:
! 602: if (setsockopt(sock->fd, IPPROTO_IPV6, IPV6_RECVPKTINFO,
! 603: (void *)&on, sizeof(on)) < 0) {
! 604:
! 605: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 606: "setsockopt(%d, IPV6_RECVPKTINFO) "
! 607: "%s: %s", sock->fd,
! 608: isc_msgcat_get(isc_msgcat,
! 609: ISC_MSGSET_GENERAL,
! 610: ISC_MSG_FAILED,
! 611: "failed"),
! 612: strbuf);
! 613: }
! 614: }
! 615: #else
! 616: #define FIX_IPV6_RECVPKTINFO(sock) (void)0
! 617: #endif
! 618:
! 619: /*%
! 620: * Increment socket-related statistics counters.
! 621: */
! 622: static inline void
! 623: inc_stats(isc_stats_t *stats, isc_statscounter_t counterid) {
! 624: REQUIRE(counterid != -1);
! 625:
! 626: if (stats != NULL)
! 627: isc_stats_increment(stats, counterid);
! 628: }
! 629:
! 630: static inline isc_result_t
! 631: watch_fd(isc_socketmgr_t *manager, int fd, int msg) {
! 632: isc_result_t result = ISC_R_SUCCESS;
! 633:
! 634: #ifdef USE_KQUEUE
! 635: struct kevent evchange;
! 636:
! 637: memset(&evchange, 0, sizeof(evchange));
! 638: if (msg == SELECT_POKE_READ)
! 639: evchange.filter = EVFILT_READ;
! 640: else
! 641: evchange.filter = EVFILT_WRITE;
! 642: evchange.flags = EV_ADD;
! 643: evchange.ident = fd;
! 644: if (kevent(manager->kqueue_fd, &evchange, 1, NULL, 0, NULL) != 0)
! 645: result = isc__errno2result(errno);
! 646:
! 647: return (result);
! 648: #elif defined(USE_EPOLL)
! 649: struct epoll_event event;
! 650:
! 651: if (msg == SELECT_POKE_READ)
! 652: event.events = EPOLLIN;
! 653: else
! 654: event.events = EPOLLOUT;
! 655: event.data.fd = fd;
! 656: if (epoll_ctl(manager->epoll_fd, EPOLL_CTL_ADD, fd, &event) == -1 &&
! 657: errno != EEXIST) {
! 658: result = isc__errno2result(errno);
! 659: }
! 660:
! 661: return (result);
! 662: #elif defined(USE_DEVPOLL)
! 663: struct pollfd pfd;
! 664: int lockid = FDLOCK_ID(fd);
! 665:
! 666: memset(&pfd, 0, sizeof(pfd));
! 667: if (msg == SELECT_POKE_READ)
! 668: pfd.events = POLLIN;
! 669: else
! 670: pfd.events = POLLOUT;
! 671: pfd.fd = fd;
! 672: pfd.revents = 0;
! 673: LOCK(&manager->fdlock[lockid]);
! 674: if (write(manager->devpoll_fd, &pfd, sizeof(pfd)) == -1)
! 675: result = isc__errno2result(errno);
! 676: else {
! 677: if (msg == SELECT_POKE_READ)
! 678: manager->fdpollinfo[fd].want_read = 1;
! 679: else
! 680: manager->fdpollinfo[fd].want_write = 1;
! 681: }
! 682: UNLOCK(&manager->fdlock[lockid]);
! 683:
! 684: return (result);
! 685: #elif defined(USE_SELECT)
! 686: LOCK(&manager->lock);
! 687: if (msg == SELECT_POKE_READ)
! 688: FD_SET(fd, manager->read_fds);
! 689: if (msg == SELECT_POKE_WRITE)
! 690: FD_SET(fd, manager->write_fds);
! 691: UNLOCK(&manager->lock);
! 692:
! 693: return (result);
! 694: #endif
! 695: }
! 696:
! 697: static inline isc_result_t
! 698: unwatch_fd(isc_socketmgr_t *manager, int fd, int msg) {
! 699: isc_result_t result = ISC_R_SUCCESS;
! 700:
! 701: #ifdef USE_KQUEUE
! 702: struct kevent evchange;
! 703:
! 704: memset(&evchange, 0, sizeof(evchange));
! 705: if (msg == SELECT_POKE_READ)
! 706: evchange.filter = EVFILT_READ;
! 707: else
! 708: evchange.filter = EVFILT_WRITE;
! 709: evchange.flags = EV_DELETE;
! 710: evchange.ident = fd;
! 711: if (kevent(manager->kqueue_fd, &evchange, 1, NULL, 0, NULL) != 0)
! 712: result = isc__errno2result(errno);
! 713:
! 714: return (result);
! 715: #elif defined(USE_EPOLL)
! 716: struct epoll_event event;
! 717:
! 718: if (msg == SELECT_POKE_READ)
! 719: event.events = EPOLLIN;
! 720: else
! 721: event.events = EPOLLOUT;
! 722: event.data.fd = fd;
! 723: if (epoll_ctl(manager->epoll_fd, EPOLL_CTL_DEL, fd, &event) == -1 &&
! 724: errno != ENOENT) {
! 725: char strbuf[ISC_STRERRORSIZE];
! 726: isc__strerror(errno, strbuf, sizeof(strbuf));
! 727: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 728: "epoll_ctl(DEL), %d: %s", fd, strbuf);
! 729: result = ISC_R_UNEXPECTED;
! 730: }
! 731: return (result);
! 732: #elif defined(USE_DEVPOLL)
! 733: struct pollfd pfds[2];
! 734: size_t writelen = sizeof(pfds[0]);
! 735: int lockid = FDLOCK_ID(fd);
! 736:
! 737: memset(pfds, 0, sizeof(pfds));
! 738: pfds[0].events = POLLREMOVE;
! 739: pfds[0].fd = fd;
! 740:
! 741: /*
! 742: * Canceling read or write polling via /dev/poll is tricky. Since it
! 743: * only provides a way of canceling per FD, we may need to re-poll the
! 744: * socket for the other operation.
! 745: */
! 746: LOCK(&manager->fdlock[lockid]);
! 747: if (msg == SELECT_POKE_READ &&
! 748: manager->fdpollinfo[fd].want_write == 1) {
! 749: pfds[1].events = POLLOUT;
! 750: pfds[1].fd = fd;
! 751: writelen += sizeof(pfds[1]);
! 752: }
! 753: if (msg == SELECT_POKE_WRITE &&
! 754: manager->fdpollinfo[fd].want_read == 1) {
! 755: pfds[1].events = POLLIN;
! 756: pfds[1].fd = fd;
! 757: writelen += sizeof(pfds[1]);
! 758: }
! 759:
! 760: if (write(manager->devpoll_fd, pfds, writelen) == -1)
! 761: result = isc__errno2result(errno);
! 762: else {
! 763: if (msg == SELECT_POKE_READ)
! 764: manager->fdpollinfo[fd].want_read = 0;
! 765: else
! 766: manager->fdpollinfo[fd].want_write = 0;
! 767: }
! 768: UNLOCK(&manager->fdlock[lockid]);
! 769:
! 770: return (result);
! 771: #elif defined(USE_SELECT)
! 772: LOCK(&manager->lock);
! 773: if (msg == SELECT_POKE_READ)
! 774: FD_CLR(fd, manager->read_fds);
! 775: else if (msg == SELECT_POKE_WRITE)
! 776: FD_CLR(fd, manager->write_fds);
! 777: UNLOCK(&manager->lock);
! 778:
! 779: return (result);
! 780: #endif
! 781: }
! 782:
! 783: static void
! 784: wakeup_socket(isc_socketmgr_t *manager, int fd, int msg) {
! 785: isc_result_t result;
! 786: int lockid = FDLOCK_ID(fd);
! 787:
! 788: /*
! 789: * This is a wakeup on a socket. If the socket is not in the
! 790: * process of being closed, start watching it for either reads
! 791: * or writes.
! 792: */
! 793:
! 794: INSIST(fd >= 0 && fd < (int)manager->maxsocks);
! 795:
! 796: if (msg == SELECT_POKE_CLOSE) {
! 797: /* No one should be updating fdstate, so no need to lock it */
! 798: INSIST(manager->fdstate[fd] == CLOSE_PENDING);
! 799: manager->fdstate[fd] = CLOSED;
! 800: (void)unwatch_fd(manager, fd, SELECT_POKE_READ);
! 801: (void)unwatch_fd(manager, fd, SELECT_POKE_WRITE);
! 802: (void)close(fd);
! 803: return;
! 804: }
! 805:
! 806: LOCK(&manager->fdlock[lockid]);
! 807: if (manager->fdstate[fd] == CLOSE_PENDING) {
! 808: UNLOCK(&manager->fdlock[lockid]);
! 809:
! 810: /*
! 811: * We accept (and ignore) any error from unwatch_fd() as we are
! 812: * closing the socket, hoping it doesn't leave dangling state in
! 813: * the kernel.
! 814: * Note that unwatch_fd() must be called after releasing the
! 815: * fdlock; otherwise it could cause deadlock due to a lock order
! 816: * reversal.
! 817: */
! 818: (void)unwatch_fd(manager, fd, SELECT_POKE_READ);
! 819: (void)unwatch_fd(manager, fd, SELECT_POKE_WRITE);
! 820: return;
! 821: }
! 822: if (manager->fdstate[fd] != MANAGED) {
! 823: UNLOCK(&manager->fdlock[lockid]);
! 824: return;
! 825: }
! 826: UNLOCK(&manager->fdlock[lockid]);
! 827:
! 828: /*
! 829: * Set requested bit.
! 830: */
! 831: result = watch_fd(manager, fd, msg);
! 832: if (result != ISC_R_SUCCESS) {
! 833: /*
! 834: * XXXJT: what should we do? Ignoring the failure of watching
! 835: * a socket will make the application dysfunctional, but there
! 836: * seems to be no reasonable recovery process.
! 837: */
! 838: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 839: ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
! 840: "failed to start watching FD (%d): %s",
! 841: fd, isc_result_totext(result));
! 842: }
! 843: }
! 844:
! 845: #ifdef ISC_PLATFORM_USETHREADS
! 846: /*
! 847: * Poke the select loop when there is something for us to do.
! 848: * The write is required (by POSIX) to complete. That is, we
! 849: * will not get partial writes.
! 850: */
! 851: static void
! 852: select_poke(isc_socketmgr_t *mgr, int fd, int msg) {
! 853: int cc;
! 854: int buf[2];
! 855: char strbuf[ISC_STRERRORSIZE];
! 856:
! 857: buf[0] = fd;
! 858: buf[1] = msg;
! 859:
! 860: do {
! 861: cc = write(mgr->pipe_fds[1], buf, sizeof(buf));
! 862: #ifdef ENOSR
! 863: /*
! 864: * Treat ENOSR as EAGAIN but loop slowly as it is
! 865: * unlikely to clear fast.
! 866: */
! 867: if (cc < 0 && errno == ENOSR) {
! 868: sleep(1);
! 869: errno = EAGAIN;
! 870: }
! 871: #endif
! 872: } while (cc < 0 && SOFT_ERROR(errno));
! 873:
! 874: if (cc < 0) {
! 875: isc__strerror(errno, strbuf, sizeof(strbuf));
! 876: FATAL_ERROR(__FILE__, __LINE__,
! 877: isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKET,
! 878: ISC_MSG_WRITEFAILED,
! 879: "write() failed "
! 880: "during watcher poke: %s"),
! 881: strbuf);
! 882: }
! 883:
! 884: INSIST(cc == sizeof(buf));
! 885: }
! 886:
! 887: /*
! 888: * Read a message on the internal fd.
! 889: */
! 890: static void
! 891: select_readmsg(isc_socketmgr_t *mgr, int *fd, int *msg) {
! 892: int buf[2];
! 893: int cc;
! 894: char strbuf[ISC_STRERRORSIZE];
! 895:
! 896: cc = read(mgr->pipe_fds[0], buf, sizeof(buf));
! 897: if (cc < 0) {
! 898: *msg = SELECT_POKE_NOTHING;
! 899: *fd = -1; /* Silence compiler. */
! 900: if (SOFT_ERROR(errno))
! 901: return;
! 902:
! 903: isc__strerror(errno, strbuf, sizeof(strbuf));
! 904: FATAL_ERROR(__FILE__, __LINE__,
! 905: isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKET,
! 906: ISC_MSG_READFAILED,
! 907: "read() failed "
! 908: "during watcher poke: %s"),
! 909: strbuf);
! 910:
! 911: return;
! 912: }
! 913: INSIST(cc == sizeof(buf));
! 914:
! 915: *fd = buf[0];
! 916: *msg = buf[1];
! 917: }
! 918: #else /* ISC_PLATFORM_USETHREADS */
! 919: /*
! 920: * Update the state of the socketmgr when something changes.
! 921: */
! 922: static void
! 923: select_poke(isc_socketmgr_t *manager, int fd, int msg) {
! 924: if (msg == SELECT_POKE_SHUTDOWN)
! 925: return;
! 926: else if (fd >= 0)
! 927: wakeup_socket(manager, fd, msg);
! 928: return;
! 929: }
! 930: #endif /* ISC_PLATFORM_USETHREADS */
! 931:
! 932: /*
! 933: * Make a fd non-blocking.
! 934: */
! 935: static isc_result_t
! 936: make_nonblock(int fd) {
! 937: int ret;
! 938: int flags;
! 939: char strbuf[ISC_STRERRORSIZE];
! 940: #ifdef USE_FIONBIO_IOCTL
! 941: int on = 1;
! 942:
! 943: ret = ioctl(fd, FIONBIO, (char *)&on);
! 944: #else
! 945: flags = fcntl(fd, F_GETFL, 0);
! 946: flags |= PORT_NONBLOCK;
! 947: ret = fcntl(fd, F_SETFL, flags);
! 948: #endif
! 949:
! 950: if (ret == -1) {
! 951: isc__strerror(errno, strbuf, sizeof(strbuf));
! 952: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 953: #ifdef USE_FIONBIO_IOCTL
! 954: "ioctl(%d, FIONBIO, &on): %s", fd,
! 955: #else
! 956: "fcntl(%d, F_SETFL, %d): %s", fd, flags,
! 957: #endif
! 958: strbuf);
! 959:
! 960: return (ISC_R_UNEXPECTED);
! 961: }
! 962:
! 963: return (ISC_R_SUCCESS);
! 964: }
! 965:
! 966: #ifdef USE_CMSG
! 967: /*
! 968: * Not all OSes support advanced CMSG macros: CMSG_LEN and CMSG_SPACE.
! 969: * In order to ensure as much portability as possible, we provide wrapper
! 970: * functions of these macros.
! 971: * Note that cmsg_space() could run slow on OSes that do not have
! 972: * CMSG_SPACE.
! 973: */
! 974: static inline ISC_SOCKADDR_LEN_T
! 975: cmsg_len(ISC_SOCKADDR_LEN_T len) {
! 976: #ifdef CMSG_LEN
! 977: return (CMSG_LEN(len));
! 978: #else
! 979: ISC_SOCKADDR_LEN_T hdrlen;
! 980:
! 981: /*
! 982: * Cast NULL so that any pointer arithmetic performed by CMSG_DATA
! 983: * is correct.
! 984: */
! 985: hdrlen = (ISC_SOCKADDR_LEN_T)CMSG_DATA(((struct cmsghdr *)NULL));
! 986: return (hdrlen + len);
! 987: #endif
! 988: }
! 989:
! 990: static inline ISC_SOCKADDR_LEN_T
! 991: cmsg_space(ISC_SOCKADDR_LEN_T len) {
! 992: #ifdef CMSG_SPACE
! 993: return (CMSG_SPACE(len));
! 994: #else
! 995: struct msghdr msg;
! 996: struct cmsghdr *cmsgp;
! 997: /*
! 998: * XXX: The buffer length is an ad-hoc value, but should be enough
! 999: * in a practical sense.
! 1000: */
! 1001: char dummybuf[sizeof(struct cmsghdr) + 1024];
! 1002:
! 1003: memset(&msg, 0, sizeof(msg));
! 1004: msg.msg_control = dummybuf;
! 1005: msg.msg_controllen = sizeof(dummybuf);
! 1006:
! 1007: cmsgp = (struct cmsghdr *)dummybuf;
! 1008: cmsgp->cmsg_len = cmsg_len(len);
! 1009:
! 1010: cmsgp = CMSG_NXTHDR(&msg, cmsgp);
! 1011: if (cmsgp != NULL)
! 1012: return ((char *)cmsgp - (char *)msg.msg_control);
! 1013: else
! 1014: return (0);
! 1015: #endif
! 1016: }
! 1017: #endif /* USE_CMSG */
! 1018:
! 1019: /*
! 1020: * Process control messages received on a socket.
! 1021: */
! 1022: static void
! 1023: process_cmsg(isc_socket_t *sock, struct msghdr *msg, isc_socketevent_t *dev) {
! 1024: #ifdef USE_CMSG
! 1025: struct cmsghdr *cmsgp;
! 1026: #ifdef ISC_PLATFORM_HAVEIN6PKTINFO
! 1027: struct in6_pktinfo *pktinfop;
! 1028: #endif
! 1029: #ifdef SO_TIMESTAMP
! 1030: struct timeval *timevalp;
! 1031: #endif
! 1032: #endif
! 1033:
! 1034: /*
! 1035: * sock is used only when ISC_NET_BSD44MSGHDR and USE_CMSG are defined.
! 1036: * msg and dev are used only when ISC_NET_BSD44MSGHDR is defined.
! 1037: * They are all here, outside of the CPP tests, because it is
! 1038: * more consistent with the usual ISC coding style.
! 1039: */
! 1040: UNUSED(sock);
! 1041: UNUSED(msg);
! 1042: UNUSED(dev);
! 1043:
! 1044: #ifdef ISC_NET_BSD44MSGHDR
! 1045:
! 1046: #ifdef MSG_TRUNC
! 1047: if ((msg->msg_flags & MSG_TRUNC) == MSG_TRUNC)
! 1048: dev->attributes |= ISC_SOCKEVENTATTR_TRUNC;
! 1049: #endif
! 1050:
! 1051: #ifdef MSG_CTRUNC
! 1052: if ((msg->msg_flags & MSG_CTRUNC) == MSG_CTRUNC)
! 1053: dev->attributes |= ISC_SOCKEVENTATTR_CTRUNC;
! 1054: #endif
! 1055:
! 1056: #ifndef USE_CMSG
! 1057: return;
! 1058: #else
! 1059: if (msg->msg_controllen == 0U || msg->msg_control == NULL)
! 1060: return;
! 1061:
! 1062: #ifdef SO_TIMESTAMP
! 1063: timevalp = NULL;
! 1064: #endif
! 1065: #ifdef ISC_PLATFORM_HAVEIN6PKTINFO
! 1066: pktinfop = NULL;
! 1067: #endif
! 1068:
! 1069: cmsgp = CMSG_FIRSTHDR(msg);
! 1070: while (cmsgp != NULL) {
! 1071: socket_log(sock, NULL, TRACE,
! 1072: isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_PROCESSCMSG,
! 1073: "processing cmsg %p", cmsgp);
! 1074:
! 1075: #ifdef ISC_PLATFORM_HAVEIN6PKTINFO
! 1076: if (cmsgp->cmsg_level == IPPROTO_IPV6
! 1077: && cmsgp->cmsg_type == IPV6_PKTINFO) {
! 1078:
! 1079: pktinfop = (struct in6_pktinfo *)CMSG_DATA(cmsgp);
! 1080: memcpy(&dev->pktinfo, pktinfop,
! 1081: sizeof(struct in6_pktinfo));
! 1082: dev->attributes |= ISC_SOCKEVENTATTR_PKTINFO;
! 1083: socket_log(sock, NULL, TRACE,
! 1084: isc_msgcat, ISC_MSGSET_SOCKET,
! 1085: ISC_MSG_IFRECEIVED,
! 1086: "interface received on ifindex %u",
! 1087: dev->pktinfo.ipi6_ifindex);
! 1088: if (IN6_IS_ADDR_MULTICAST(&pktinfop->ipi6_addr))
! 1089: dev->attributes |= ISC_SOCKEVENTATTR_MULTICAST;
! 1090: goto next;
! 1091: }
! 1092: #endif
! 1093:
! 1094: #ifdef SO_TIMESTAMP
! 1095: if (cmsgp->cmsg_level == SOL_SOCKET
! 1096: && cmsgp->cmsg_type == SCM_TIMESTAMP) {
! 1097: timevalp = (struct timeval *)CMSG_DATA(cmsgp);
! 1098: dev->timestamp.seconds = timevalp->tv_sec;
! 1099: dev->timestamp.nanoseconds = timevalp->tv_usec * 1000;
! 1100: dev->attributes |= ISC_SOCKEVENTATTR_TIMESTAMP;
! 1101: goto next;
! 1102: }
! 1103: #endif
! 1104:
! 1105: next:
! 1106: cmsgp = CMSG_NXTHDR(msg, cmsgp);
! 1107: }
! 1108: #endif /* USE_CMSG */
! 1109:
! 1110: #endif /* ISC_NET_BSD44MSGHDR */
! 1111: }
! 1112:
! 1113: /*
! 1114: * Construct an iov array and attach it to the msghdr passed in. This is
! 1115: * the SEND constructor, which will use the used region of the buffer
! 1116: * (if using a buffer list) or will use the internal region (if a single
! 1117: * buffer I/O is requested).
! 1118: *
! 1119: * Nothing can be NULL, and the done event must list at least one buffer
! 1120: * on the buffer linked list for this function to be meaningful.
! 1121: *
! 1122: * If write_countp != NULL, *write_countp will hold the number of bytes
! 1123: * this transaction can send.
! 1124: */
! 1125: static void
! 1126: build_msghdr_send(isc_socket_t *sock, isc_socketevent_t *dev,
! 1127: struct msghdr *msg, struct iovec *iov, size_t *write_countp)
! 1128: {
! 1129: unsigned int iovcount;
! 1130: isc_buffer_t *buffer;
! 1131: isc_region_t used;
! 1132: size_t write_count;
! 1133: size_t skip_count;
! 1134:
! 1135: memset(msg, 0, sizeof(*msg));
! 1136:
! 1137: if (!sock->connected) {
! 1138: msg->msg_name = (void *)&dev->address.type.sa;
! 1139: msg->msg_namelen = dev->address.length;
! 1140: } else {
! 1141: msg->msg_name = NULL;
! 1142: msg->msg_namelen = 0;
! 1143: }
! 1144:
! 1145: buffer = ISC_LIST_HEAD(dev->bufferlist);
! 1146: write_count = 0;
! 1147: iovcount = 0;
! 1148:
! 1149: /*
! 1150: * Single buffer I/O? Skip what we've done so far in this region.
! 1151: */
! 1152: if (buffer == NULL) {
! 1153: write_count = dev->region.length - dev->n;
! 1154: iov[0].iov_base = (void *)(dev->region.base + dev->n);
! 1155: iov[0].iov_len = write_count;
! 1156: iovcount = 1;
! 1157:
! 1158: goto config;
! 1159: }
! 1160:
! 1161: /*
! 1162: * Multibuffer I/O.
! 1163: * Skip the data in the buffer list that we have already written.
! 1164: */
! 1165: skip_count = dev->n;
! 1166: while (buffer != NULL) {
! 1167: REQUIRE(ISC_BUFFER_VALID(buffer));
! 1168: if (skip_count < isc_buffer_usedlength(buffer))
! 1169: break;
! 1170: skip_count -= isc_buffer_usedlength(buffer);
! 1171: buffer = ISC_LIST_NEXT(buffer, link);
! 1172: }
! 1173:
! 1174: while (buffer != NULL) {
! 1175: INSIST(iovcount < MAXSCATTERGATHER_SEND);
! 1176:
! 1177: isc_buffer_usedregion(buffer, &used);
! 1178:
! 1179: if (used.length > 0) {
! 1180: iov[iovcount].iov_base = (void *)(used.base
! 1181: + skip_count);
! 1182: iov[iovcount].iov_len = used.length - skip_count;
! 1183: write_count += (used.length - skip_count);
! 1184: skip_count = 0;
! 1185: iovcount++;
! 1186: }
! 1187: buffer = ISC_LIST_NEXT(buffer, link);
! 1188: }
! 1189:
! 1190: INSIST(skip_count == 0U);
! 1191:
! 1192: config:
! 1193: msg->msg_iov = iov;
! 1194: msg->msg_iovlen = iovcount;
! 1195:
! 1196: #ifdef ISC_NET_BSD44MSGHDR
! 1197: msg->msg_control = NULL;
! 1198: msg->msg_controllen = 0;
! 1199: msg->msg_flags = 0;
! 1200: #if defined(USE_CMSG) && defined(ISC_PLATFORM_HAVEIN6PKTINFO)
! 1201: if ((sock->type == isc_sockettype_udp)
! 1202: && ((dev->attributes & ISC_SOCKEVENTATTR_PKTINFO) != 0)) {
! 1203: struct cmsghdr *cmsgp;
! 1204: struct in6_pktinfo *pktinfop;
! 1205:
! 1206: socket_log(sock, NULL, TRACE,
! 1207: isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_SENDTODATA,
! 1208: "sendto pktinfo data, ifindex %u",
! 1209: dev->pktinfo.ipi6_ifindex);
! 1210:
! 1211: msg->msg_controllen = cmsg_space(sizeof(struct in6_pktinfo));
! 1212: INSIST(msg->msg_controllen <= sock->sendcmsgbuflen);
! 1213: msg->msg_control = (void *)sock->sendcmsgbuf;
! 1214:
! 1215: cmsgp = (struct cmsghdr *)sock->sendcmsgbuf;
! 1216: cmsgp->cmsg_level = IPPROTO_IPV6;
! 1217: cmsgp->cmsg_type = IPV6_PKTINFO;
! 1218: cmsgp->cmsg_len = cmsg_len(sizeof(struct in6_pktinfo));
! 1219: pktinfop = (struct in6_pktinfo *)CMSG_DATA(cmsgp);
! 1220: memcpy(pktinfop, &dev->pktinfo, sizeof(struct in6_pktinfo));
! 1221: }
! 1222: #endif /* USE_CMSG && ISC_PLATFORM_HAVEIPV6 */
! 1223: #else /* ISC_NET_BSD44MSGHDR */
! 1224: msg->msg_accrights = NULL;
! 1225: msg->msg_accrightslen = 0;
! 1226: #endif /* ISC_NET_BSD44MSGHDR */
! 1227:
! 1228: if (write_countp != NULL)
! 1229: *write_countp = write_count;
! 1230: }
! 1231:
! 1232: /*
! 1233: * Construct an iov array and attach it to the msghdr passed in. This is
! 1234: * the RECV constructor, which will use the available region of the buffer
! 1235: * (if using a buffer list) or will use the internal region (if a single
! 1236: * buffer I/O is requested).
! 1237: *
! 1238: * Nothing can be NULL, and the done event must list at least one buffer
! 1239: * on the buffer linked list for this function to be meaningful.
! 1240: *
! 1241: * If read_countp != NULL, *read_countp will hold the number of bytes
! 1242: * this transaction can receive.
! 1243: */
! 1244: static void
! 1245: build_msghdr_recv(isc_socket_t *sock, isc_socketevent_t *dev,
! 1246: struct msghdr *msg, struct iovec *iov, size_t *read_countp)
! 1247: {
! 1248: unsigned int iovcount;
! 1249: isc_buffer_t *buffer;
! 1250: isc_region_t available;
! 1251: size_t read_count;
! 1252:
! 1253: memset(msg, 0, sizeof(struct msghdr));
! 1254:
! 1255: if (sock->type == isc_sockettype_udp) {
! 1256: memset(&dev->address, 0, sizeof(dev->address));
! 1257: #ifdef BROKEN_RECVMSG
! 1258: if (sock->pf == AF_INET) {
! 1259: msg->msg_name = (void *)&dev->address.type.sin;
! 1260: msg->msg_namelen = sizeof(dev->address.type.sin6);
! 1261: } else if (sock->pf == AF_INET6) {
! 1262: msg->msg_name = (void *)&dev->address.type.sin6;
! 1263: msg->msg_namelen = sizeof(dev->address.type.sin6);
! 1264: #ifdef ISC_PLATFORM_HAVESYSUNH
! 1265: } else if (sock->pf == AF_UNIX) {
! 1266: msg->msg_name = (void *)&dev->address.type.sunix;
! 1267: msg->msg_namelen = sizeof(dev->address.type.sunix);
! 1268: #endif
! 1269: } else {
! 1270: msg->msg_name = (void *)&dev->address.type.sa;
! 1271: msg->msg_namelen = sizeof(dev->address.type);
! 1272: }
! 1273: #else
! 1274: msg->msg_name = (void *)&dev->address.type.sa;
! 1275: msg->msg_namelen = sizeof(dev->address.type);
! 1276: #endif
! 1277: #ifdef ISC_NET_RECVOVERFLOW
! 1278: /* If needed, steal one iovec for overflow detection. */
! 1279: maxiov--;
! 1280: #endif
! 1281: } else { /* TCP */
! 1282: msg->msg_name = NULL;
! 1283: msg->msg_namelen = 0;
! 1284: dev->address = sock->peer_address;
! 1285: }
! 1286:
! 1287: buffer = ISC_LIST_HEAD(dev->bufferlist);
! 1288: read_count = 0;
! 1289:
! 1290: /*
! 1291: * Single buffer I/O? Skip what we've done so far in this region.
! 1292: */
! 1293: if (buffer == NULL) {
! 1294: read_count = dev->region.length - dev->n;
! 1295: iov[0].iov_base = (void *)(dev->region.base + dev->n);
! 1296: iov[0].iov_len = read_count;
! 1297: iovcount = 1;
! 1298:
! 1299: goto config;
! 1300: }
! 1301:
! 1302: /*
! 1303: * Multibuffer I/O.
! 1304: * Skip empty buffers.
! 1305: */
! 1306: while (buffer != NULL) {
! 1307: REQUIRE(ISC_BUFFER_VALID(buffer));
! 1308: if (isc_buffer_availablelength(buffer) != 0)
! 1309: break;
! 1310: buffer = ISC_LIST_NEXT(buffer, link);
! 1311: }
! 1312:
! 1313: iovcount = 0;
! 1314: while (buffer != NULL) {
! 1315: INSIST(iovcount < MAXSCATTERGATHER_RECV);
! 1316:
! 1317: isc_buffer_availableregion(buffer, &available);
! 1318:
! 1319: if (available.length > 0) {
! 1320: iov[iovcount].iov_base = (void *)(available.base);
! 1321: iov[iovcount].iov_len = available.length;
! 1322: read_count += available.length;
! 1323: iovcount++;
! 1324: }
! 1325: buffer = ISC_LIST_NEXT(buffer, link);
! 1326: }
! 1327:
! 1328: config:
! 1329:
! 1330: /*
! 1331: * If needed, set up to receive that one extra byte. Note that
! 1332: * we know there is at least one iov left, since we stole it
! 1333: * at the top of this function.
! 1334: */
! 1335: #ifdef ISC_NET_RECVOVERFLOW
! 1336: if (sock->type == isc_sockettype_udp) {
! 1337: iov[iovcount].iov_base = (void *)(&sock->overflow);
! 1338: iov[iovcount].iov_len = 1;
! 1339: iovcount++;
! 1340: }
! 1341: #endif
! 1342:
! 1343: msg->msg_iov = iov;
! 1344: msg->msg_iovlen = iovcount;
! 1345:
! 1346: #ifdef ISC_NET_BSD44MSGHDR
! 1347: msg->msg_control = NULL;
! 1348: msg->msg_controllen = 0;
! 1349: msg->msg_flags = 0;
! 1350: #if defined(USE_CMSG)
! 1351: if (sock->type == isc_sockettype_udp) {
! 1352: msg->msg_control = sock->recvcmsgbuf;
! 1353: msg->msg_controllen = sock->recvcmsgbuflen;
! 1354: }
! 1355: #endif /* USE_CMSG */
! 1356: #else /* ISC_NET_BSD44MSGHDR */
! 1357: msg->msg_accrights = NULL;
! 1358: msg->msg_accrightslen = 0;
! 1359: #endif /* ISC_NET_BSD44MSGHDR */
! 1360:
! 1361: if (read_countp != NULL)
! 1362: *read_countp = read_count;
! 1363: }
! 1364:
! 1365: static void
! 1366: set_dev_address(isc_sockaddr_t *address, isc_socket_t *sock,
! 1367: isc_socketevent_t *dev)
! 1368: {
! 1369: if (sock->type == isc_sockettype_udp) {
! 1370: if (address != NULL)
! 1371: dev->address = *address;
! 1372: else
! 1373: dev->address = sock->peer_address;
! 1374: } else if (sock->type == isc_sockettype_tcp) {
! 1375: INSIST(address == NULL);
! 1376: dev->address = sock->peer_address;
! 1377: }
! 1378: }
! 1379:
! 1380: static void
! 1381: destroy_socketevent(isc_event_t *event) {
! 1382: isc_socketevent_t *ev = (isc_socketevent_t *)event;
! 1383:
! 1384: INSIST(ISC_LIST_EMPTY(ev->bufferlist));
! 1385:
! 1386: (ev->destroy)(event);
! 1387: }
! 1388:
! 1389: static isc_socketevent_t *
! 1390: allocate_socketevent(isc_socket_t *sock, isc_eventtype_t eventtype,
! 1391: isc_taskaction_t action, const void *arg)
! 1392: {
! 1393: isc_socketevent_t *ev;
! 1394:
! 1395: ev = (isc_socketevent_t *)isc_event_allocate(sock->manager->mctx,
! 1396: sock, eventtype,
! 1397: action, arg,
! 1398: sizeof(*ev));
! 1399:
! 1400: if (ev == NULL)
! 1401: return (NULL);
! 1402:
! 1403: ev->result = ISC_R_UNEXPECTED;
! 1404: ISC_LINK_INIT(ev, ev_link);
! 1405: ISC_LIST_INIT(ev->bufferlist);
! 1406: ev->region.base = NULL;
! 1407: ev->n = 0;
! 1408: ev->offset = 0;
! 1409: ev->attributes = 0;
! 1410: ev->destroy = ev->ev_destroy;
! 1411: ev->ev_destroy = destroy_socketevent;
! 1412:
! 1413: return (ev);
! 1414: }
! 1415:
! 1416: #if defined(ISC_SOCKET_DEBUG)
! 1417: static void
! 1418: dump_msg(struct msghdr *msg) {
! 1419: unsigned int i;
! 1420:
! 1421: printf("MSGHDR %p\n", msg);
! 1422: printf("\tname %p, namelen %ld\n", msg->msg_name,
! 1423: (long) msg->msg_namelen);
! 1424: printf("\tiov %p, iovlen %ld\n", msg->msg_iov,
! 1425: (long) msg->msg_iovlen);
! 1426: for (i = 0; i < (unsigned int)msg->msg_iovlen; i++)
! 1427: printf("\t\t%d\tbase %p, len %ld\n", i,
! 1428: msg->msg_iov[i].iov_base,
! 1429: (long) msg->msg_iov[i].iov_len);
! 1430: #ifdef ISC_NET_BSD44MSGHDR
! 1431: printf("\tcontrol %p, controllen %ld\n", msg->msg_control,
! 1432: (long) msg->msg_controllen);
! 1433: #endif
! 1434: }
! 1435: #endif
! 1436:
! 1437: #define DOIO_SUCCESS 0 /* i/o ok, event sent */
! 1438: #define DOIO_SOFT 1 /* i/o ok, soft error, no event sent */
! 1439: #define DOIO_HARD 2 /* i/o error, event sent */
! 1440: #define DOIO_EOF 3 /* EOF, no event sent */
! 1441:
! 1442: static int
! 1443: doio_recv(isc_socket_t *sock, isc_socketevent_t *dev) {
! 1444: int cc;
! 1445: struct iovec iov[MAXSCATTERGATHER_RECV];
! 1446: size_t read_count;
! 1447: size_t actual_count;
! 1448: struct msghdr msghdr;
! 1449: isc_buffer_t *buffer;
! 1450: int recv_errno;
! 1451: char strbuf[ISC_STRERRORSIZE];
! 1452:
! 1453: build_msghdr_recv(sock, dev, &msghdr, iov, &read_count);
! 1454:
! 1455: #if defined(ISC_SOCKET_DEBUG)
! 1456: dump_msg(&msghdr);
! 1457: #endif
! 1458:
! 1459: cc = recvmsg(sock->fd, &msghdr, 0);
! 1460: recv_errno = errno;
! 1461:
! 1462: #if defined(ISC_SOCKET_DEBUG)
! 1463: dump_msg(&msghdr);
! 1464: #endif
! 1465:
! 1466: if (cc < 0) {
! 1467: if (SOFT_ERROR(recv_errno))
! 1468: return (DOIO_SOFT);
! 1469:
! 1470: if (isc_log_wouldlog(isc_lctx, IOEVENT_LEVEL)) {
! 1471: isc__strerror(recv_errno, strbuf, sizeof(strbuf));
! 1472: socket_log(sock, NULL, IOEVENT,
! 1473: isc_msgcat, ISC_MSGSET_SOCKET,
! 1474: ISC_MSG_DOIORECV,
! 1475: "doio_recv: recvmsg(%d) %d bytes, err %d/%s",
! 1476: sock->fd, cc, recv_errno, strbuf);
! 1477: }
! 1478:
! 1479: #define SOFT_OR_HARD(_system, _isc) \
! 1480: if (recv_errno == _system) { \
! 1481: if (sock->connected) { \
! 1482: dev->result = _isc; \
! 1483: inc_stats(sock->manager->stats, \
! 1484: sock->statsindex[STATID_RECVFAIL]); \
! 1485: return (DOIO_HARD); \
! 1486: } \
! 1487: return (DOIO_SOFT); \
! 1488: }
! 1489: #define ALWAYS_HARD(_system, _isc) \
! 1490: if (recv_errno == _system) { \
! 1491: dev->result = _isc; \
! 1492: inc_stats(sock->manager->stats, \
! 1493: sock->statsindex[STATID_RECVFAIL]); \
! 1494: return (DOIO_HARD); \
! 1495: }
! 1496:
! 1497: SOFT_OR_HARD(ECONNREFUSED, ISC_R_CONNREFUSED);
! 1498: SOFT_OR_HARD(ENETUNREACH, ISC_R_NETUNREACH);
! 1499: SOFT_OR_HARD(EHOSTUNREACH, ISC_R_HOSTUNREACH);
! 1500: SOFT_OR_HARD(EHOSTDOWN, ISC_R_HOSTDOWN);
! 1501: /* HPUX 11.11 can return EADDRNOTAVAIL. */
! 1502: SOFT_OR_HARD(EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
! 1503: ALWAYS_HARD(ENOBUFS, ISC_R_NORESOURCES);
! 1504: /*
! 1505: * HPUX returns EPROTO and EINVAL on receiving some ICMP/ICMPv6
! 1506: * errors.
! 1507: */
! 1508: #ifdef EPROTO
! 1509: SOFT_OR_HARD(EPROTO, ISC_R_HOSTUNREACH);
! 1510: #endif
! 1511: SOFT_OR_HARD(EINVAL, ISC_R_HOSTUNREACH);
! 1512:
! 1513: #undef SOFT_OR_HARD
! 1514: #undef ALWAYS_HARD
! 1515:
! 1516: dev->result = isc__errno2result(recv_errno);
! 1517: inc_stats(sock->manager->stats,
! 1518: sock->statsindex[STATID_RECVFAIL]);
! 1519: return (DOIO_HARD);
! 1520: }
! 1521:
! 1522: /*
! 1523: * On TCP, zero length reads indicate EOF, while on
! 1524: * UDP, zero length reads are perfectly valid, although
! 1525: * strange.
! 1526: */
! 1527: if ((sock->type == isc_sockettype_tcp) && (cc == 0))
! 1528: return (DOIO_EOF);
! 1529:
! 1530: if (sock->type == isc_sockettype_udp) {
! 1531: dev->address.length = msghdr.msg_namelen;
! 1532: if (isc_sockaddr_getport(&dev->address) == 0) {
! 1533: if (isc_log_wouldlog(isc_lctx, IOEVENT_LEVEL)) {
! 1534: socket_log(sock, &dev->address, IOEVENT,
! 1535: isc_msgcat, ISC_MSGSET_SOCKET,
! 1536: ISC_MSG_ZEROPORT,
! 1537: "dropping source port zero packet");
! 1538: }
! 1539: return (DOIO_SOFT);
! 1540: }
! 1541: }
! 1542:
! 1543: socket_log(sock, &dev->address, IOEVENT,
! 1544: isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_PKTRECV,
! 1545: "packet received correctly");
! 1546:
! 1547: /*
! 1548: * Overflow bit detection. If we received MORE bytes than we should,
! 1549: * this indicates an overflow situation. Set the flag in the
! 1550: * dev entry and adjust how much we read by one.
! 1551: */
! 1552: #ifdef ISC_NET_RECVOVERFLOW
! 1553: if ((sock->type == isc_sockettype_udp) && ((size_t)cc > read_count)) {
! 1554: dev->attributes |= ISC_SOCKEVENTATTR_TRUNC;
! 1555: cc--;
! 1556: }
! 1557: #endif
! 1558:
! 1559: /*
! 1560: * If there are control messages attached, run through them and pull
! 1561: * out the interesting bits.
! 1562: */
! 1563: if (sock->type == isc_sockettype_udp)
! 1564: process_cmsg(sock, &msghdr, dev);
! 1565:
! 1566: /*
! 1567: * update the buffers (if any) and the i/o count
! 1568: */
! 1569: dev->n += cc;
! 1570: actual_count = cc;
! 1571: buffer = ISC_LIST_HEAD(dev->bufferlist);
! 1572: while (buffer != NULL && actual_count > 0U) {
! 1573: REQUIRE(ISC_BUFFER_VALID(buffer));
! 1574: if (isc_buffer_availablelength(buffer) <= actual_count) {
! 1575: actual_count -= isc_buffer_availablelength(buffer);
! 1576: isc_buffer_add(buffer,
! 1577: isc_buffer_availablelength(buffer));
! 1578: } else {
! 1579: isc_buffer_add(buffer, actual_count);
! 1580: actual_count = 0;
! 1581: break;
! 1582: }
! 1583: buffer = ISC_LIST_NEXT(buffer, link);
! 1584: if (buffer == NULL) {
! 1585: INSIST(actual_count == 0U);
! 1586: }
! 1587: }
! 1588:
! 1589: /*
! 1590: * If we read less than we expected, update counters,
! 1591: * and let the upper layer poke the descriptor.
! 1592: */
! 1593: if (((size_t)cc != read_count) && (dev->n < dev->minimum))
! 1594: return (DOIO_SOFT);
! 1595:
! 1596: /*
! 1597: * Full reads are posted, or partials if partials are ok.
! 1598: */
! 1599: dev->result = ISC_R_SUCCESS;
! 1600: return (DOIO_SUCCESS);
! 1601: }
! 1602:
! 1603: /*
! 1604: * Returns:
! 1605: * DOIO_SUCCESS The operation succeeded. dev->result contains
! 1606: * ISC_R_SUCCESS.
! 1607: *
! 1608: * DOIO_HARD A hard or unexpected I/O error was encountered.
! 1609: * dev->result contains the appropriate error.
! 1610: *
! 1611: * DOIO_SOFT A soft I/O error was encountered. No senddone
! 1612: * event was sent. The operation should be retried.
! 1613: *
! 1614: * No other return values are possible.
! 1615: */
! 1616: static int
! 1617: doio_send(isc_socket_t *sock, isc_socketevent_t *dev) {
! 1618: int cc;
! 1619: struct iovec iov[MAXSCATTERGATHER_SEND];
! 1620: size_t write_count;
! 1621: struct msghdr msghdr;
! 1622: char addrbuf[ISC_SOCKADDR_FORMATSIZE];
! 1623: int attempts = 0;
! 1624: int send_errno;
! 1625: char strbuf[ISC_STRERRORSIZE];
! 1626:
! 1627: build_msghdr_send(sock, dev, &msghdr, iov, &write_count);
! 1628:
! 1629: resend:
! 1630: cc = sendmsg(sock->fd, &msghdr, 0);
! 1631: send_errno = errno;
! 1632:
! 1633: /*
! 1634: * Check for error or block condition.
! 1635: */
! 1636: if (cc < 0) {
! 1637: if (send_errno == EINTR && ++attempts < NRETRIES)
! 1638: goto resend;
! 1639:
! 1640: if (SOFT_ERROR(send_errno))
! 1641: return (DOIO_SOFT);
! 1642:
! 1643: #define SOFT_OR_HARD(_system, _isc) \
! 1644: if (send_errno == _system) { \
! 1645: if (sock->connected) { \
! 1646: dev->result = _isc; \
! 1647: inc_stats(sock->manager->stats, \
! 1648: sock->statsindex[STATID_SENDFAIL]); \
! 1649: return (DOIO_HARD); \
! 1650: } \
! 1651: return (DOIO_SOFT); \
! 1652: }
! 1653: #define ALWAYS_HARD(_system, _isc) \
! 1654: if (send_errno == _system) { \
! 1655: dev->result = _isc; \
! 1656: inc_stats(sock->manager->stats, \
! 1657: sock->statsindex[STATID_SENDFAIL]); \
! 1658: return (DOIO_HARD); \
! 1659: }
! 1660:
! 1661: SOFT_OR_HARD(ECONNREFUSED, ISC_R_CONNREFUSED);
! 1662: ALWAYS_HARD(EACCES, ISC_R_NOPERM);
! 1663: ALWAYS_HARD(EAFNOSUPPORT, ISC_R_ADDRNOTAVAIL);
! 1664: ALWAYS_HARD(EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
! 1665: ALWAYS_HARD(EHOSTUNREACH, ISC_R_HOSTUNREACH);
! 1666: #ifdef EHOSTDOWN
! 1667: ALWAYS_HARD(EHOSTDOWN, ISC_R_HOSTUNREACH);
! 1668: #endif
! 1669: ALWAYS_HARD(ENETUNREACH, ISC_R_NETUNREACH);
! 1670: ALWAYS_HARD(ENOBUFS, ISC_R_NORESOURCES);
! 1671: ALWAYS_HARD(EPERM, ISC_R_HOSTUNREACH);
! 1672: ALWAYS_HARD(EPIPE, ISC_R_NOTCONNECTED);
! 1673: ALWAYS_HARD(ECONNRESET, ISC_R_CONNECTIONRESET);
! 1674:
! 1675: #undef SOFT_OR_HARD
! 1676: #undef ALWAYS_HARD
! 1677:
! 1678: /*
! 1679: * The other error types depend on whether or not the
! 1680: * socket is UDP or TCP. If it is UDP, some errors
! 1681: * that we expect to be fatal under TCP are merely
! 1682: * annoying, and are really soft errors.
! 1683: *
! 1684: * However, these soft errors are still returned as
! 1685: * a status.
! 1686: */
! 1687: isc_sockaddr_format(&dev->address, addrbuf, sizeof(addrbuf));
! 1688: isc__strerror(send_errno, strbuf, sizeof(strbuf));
! 1689: UNEXPECTED_ERROR(__FILE__, __LINE__, "internal_send: %s: %s",
! 1690: addrbuf, strbuf);
! 1691: dev->result = isc__errno2result(send_errno);
! 1692: inc_stats(sock->manager->stats,
! 1693: sock->statsindex[STATID_SENDFAIL]);
! 1694: return (DOIO_HARD);
! 1695: }
! 1696:
! 1697: if (cc == 0) {
! 1698: inc_stats(sock->manager->stats,
! 1699: sock->statsindex[STATID_SENDFAIL]);
! 1700: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 1701: "doio_send: send() %s 0",
! 1702: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 1703: ISC_MSG_RETURNED, "returned"));
! 1704: }
! 1705:
! 1706: /*
! 1707: * If we write less than we expected, update counters, poke.
! 1708: */
! 1709: dev->n += cc;
! 1710: if ((size_t)cc != write_count)
! 1711: return (DOIO_SOFT);
! 1712:
! 1713: /*
! 1714: * Exactly what we wanted to write. We're done with this
! 1715: * entry. Post its completion event.
! 1716: */
! 1717: dev->result = ISC_R_SUCCESS;
! 1718: return (DOIO_SUCCESS);
! 1719: }
! 1720:
! 1721: /*
! 1722: * Kill.
! 1723: *
! 1724: * Caller must ensure that the socket is not locked and no external
! 1725: * references exist.
! 1726: */
! 1727: static void
! 1728: closesocket(isc_socketmgr_t *manager, isc_socket_t *sock, int fd) {
! 1729: isc_sockettype_t type = sock->type;
! 1730: int lockid = FDLOCK_ID(fd);
! 1731:
! 1732: /*
! 1733: * No one has this socket open, so the watcher doesn't have to be
! 1734: * poked, and the socket doesn't have to be locked.
! 1735: */
! 1736: LOCK(&manager->fdlock[lockid]);
! 1737: manager->fds[fd] = NULL;
! 1738: if (type == isc_sockettype_fdwatch)
! 1739: manager->fdstate[fd] = CLOSED;
! 1740: else
! 1741: manager->fdstate[fd] = CLOSE_PENDING;
! 1742: UNLOCK(&manager->fdlock[lockid]);
! 1743: if (type == isc_sockettype_fdwatch) {
! 1744: /*
! 1745: * The caller may close the socket once this function returns,
! 1746: * and `fd' may be reassigned for a new socket. So we do
! 1747: * unwatch_fd() here, rather than defer it via select_poke().
! 1748: * Note: this may complicate data protection among threads and
! 1749: * may reduce performance due to additional locks. One way to
! 1750: * solve this would be to dup() the watched descriptor, but we
! 1751: * take a simpler approach at this moment.
! 1752: */
! 1753: (void)unwatch_fd(manager, fd, SELECT_POKE_READ);
! 1754: (void)unwatch_fd(manager, fd, SELECT_POKE_WRITE);
! 1755: } else
! 1756: select_poke(manager, fd, SELECT_POKE_CLOSE);
! 1757:
! 1758: inc_stats(manager->stats, sock->statsindex[STATID_CLOSE]);
! 1759:
! 1760: /*
! 1761: * update manager->maxfd here (XXX: this should be implemented more
! 1762: * efficiently)
! 1763: */
! 1764: #ifdef USE_SELECT
! 1765: LOCK(&manager->lock);
! 1766: if (manager->maxfd == fd) {
! 1767: int i;
! 1768:
! 1769: manager->maxfd = 0;
! 1770: for (i = fd - 1; i >= 0; i--) {
! 1771: lockid = FDLOCK_ID(i);
! 1772:
! 1773: LOCK(&manager->fdlock[lockid]);
! 1774: if (manager->fdstate[i] == MANAGED) {
! 1775: manager->maxfd = i;
! 1776: UNLOCK(&manager->fdlock[lockid]);
! 1777: break;
! 1778: }
! 1779: UNLOCK(&manager->fdlock[lockid]);
! 1780: }
! 1781: #ifdef ISC_PLATFORM_USETHREADS
! 1782: if (manager->maxfd < manager->pipe_fds[0])
! 1783: manager->maxfd = manager->pipe_fds[0];
! 1784: #endif
! 1785: }
! 1786: UNLOCK(&manager->lock);
! 1787: #endif /* USE_SELECT */
! 1788: }
! 1789:
! 1790: static void
! 1791: destroy(isc_socket_t **sockp) {
! 1792: int fd;
! 1793: isc_socket_t *sock = *sockp;
! 1794: isc_socketmgr_t *manager = sock->manager;
! 1795:
! 1796: socket_log(sock, NULL, CREATION, isc_msgcat, ISC_MSGSET_SOCKET,
! 1797: ISC_MSG_DESTROYING, "destroying");
! 1798:
! 1799: INSIST(ISC_LIST_EMPTY(sock->accept_list));
! 1800: INSIST(ISC_LIST_EMPTY(sock->recv_list));
! 1801: INSIST(ISC_LIST_EMPTY(sock->send_list));
! 1802: INSIST(sock->connect_ev == NULL);
! 1803: REQUIRE(sock->fd == -1 || sock->fd < (int)manager->maxsocks);
! 1804:
! 1805: if (sock->fd >= 0) {
! 1806: fd = sock->fd;
! 1807: sock->fd = -1;
! 1808: closesocket(manager, sock, fd);
! 1809: }
! 1810:
! 1811: LOCK(&manager->lock);
! 1812:
! 1813: ISC_LIST_UNLINK(manager->socklist, sock, link);
! 1814:
! 1815: #ifdef ISC_PLATFORM_USETHREADS
! 1816: if (ISC_LIST_EMPTY(manager->socklist))
! 1817: SIGNAL(&manager->shutdown_ok);
! 1818: #endif /* ISC_PLATFORM_USETHREADS */
! 1819:
! 1820: UNLOCK(&manager->lock);
! 1821:
! 1822: free_socket(sockp);
! 1823: }
! 1824:
! 1825: static isc_result_t
! 1826: allocate_socket(isc_socketmgr_t *manager, isc_sockettype_t type,
! 1827: isc_socket_t **socketp)
! 1828: {
! 1829: isc_socket_t *sock;
! 1830: isc_result_t result;
! 1831: ISC_SOCKADDR_LEN_T cmsgbuflen;
! 1832:
! 1833: sock = isc_mem_get(manager->mctx, sizeof(*sock));
! 1834:
! 1835: if (sock == NULL)
! 1836: return (ISC_R_NOMEMORY);
! 1837:
! 1838: result = ISC_R_UNEXPECTED;
! 1839:
! 1840: sock->magic = 0;
! 1841: sock->references = 0;
! 1842:
! 1843: sock->manager = manager;
! 1844: sock->type = type;
! 1845: sock->fd = -1;
! 1846: sock->statsindex = NULL;
! 1847:
! 1848: ISC_LINK_INIT(sock, link);
! 1849:
! 1850: sock->recvcmsgbuf = NULL;
! 1851: sock->sendcmsgbuf = NULL;
! 1852:
! 1853: /*
! 1854: * set up cmsg buffers
! 1855: */
! 1856: cmsgbuflen = 0;
! 1857: #if defined(USE_CMSG) && defined(ISC_PLATFORM_HAVEIN6PKTINFO)
! 1858: cmsgbuflen = cmsg_space(sizeof(struct in6_pktinfo));
! 1859: #endif
! 1860: #if defined(USE_CMSG) && defined(SO_TIMESTAMP)
! 1861: cmsgbuflen += cmsg_space(sizeof(struct timeval));
! 1862: #endif
! 1863: sock->recvcmsgbuflen = cmsgbuflen;
! 1864: if (sock->recvcmsgbuflen != 0U) {
! 1865: sock->recvcmsgbuf = isc_mem_get(manager->mctx, cmsgbuflen);
! 1866: if (sock->recvcmsgbuf == NULL)
! 1867: goto error;
! 1868: }
! 1869:
! 1870: cmsgbuflen = 0;
! 1871: #if defined(USE_CMSG) && defined(ISC_PLATFORM_HAVEIN6PKTINFO)
! 1872: cmsgbuflen = cmsg_space(sizeof(struct in6_pktinfo));
! 1873: #endif
! 1874: sock->sendcmsgbuflen = cmsgbuflen;
! 1875: if (sock->sendcmsgbuflen != 0U) {
! 1876: sock->sendcmsgbuf = isc_mem_get(manager->mctx, cmsgbuflen);
! 1877: if (sock->sendcmsgbuf == NULL)
! 1878: goto error;
! 1879: }
! 1880:
! 1881: memset(sock->name, 0, sizeof(sock->name));
! 1882: sock->tag = NULL;
! 1883:
! 1884: /*
! 1885: * set up list of readers and writers to be initially empty
! 1886: */
! 1887: ISC_LIST_INIT(sock->recv_list);
! 1888: ISC_LIST_INIT(sock->send_list);
! 1889: ISC_LIST_INIT(sock->accept_list);
! 1890: sock->connect_ev = NULL;
! 1891: sock->pending_recv = 0;
! 1892: sock->pending_send = 0;
! 1893: sock->pending_accept = 0;
! 1894: sock->listener = 0;
! 1895: sock->connected = 0;
! 1896: sock->connecting = 0;
! 1897: sock->bound = 0;
! 1898:
! 1899: /*
! 1900: * initialize the lock
! 1901: */
! 1902: result = isc_mutex_init(&sock->lock);
! 1903: if (result != ISC_R_SUCCESS) {
! 1904: sock->magic = 0;
! 1905: goto error;
! 1906: }
! 1907:
! 1908: /*
! 1909: * Initialize readable and writable events
! 1910: */
! 1911: ISC_EVENT_INIT(&sock->readable_ev, sizeof(intev_t),
! 1912: ISC_EVENTATTR_NOPURGE, NULL, ISC_SOCKEVENT_INTR,
! 1913: NULL, sock, sock, NULL, NULL);
! 1914: ISC_EVENT_INIT(&sock->writable_ev, sizeof(intev_t),
! 1915: ISC_EVENTATTR_NOPURGE, NULL, ISC_SOCKEVENT_INTW,
! 1916: NULL, sock, sock, NULL, NULL);
! 1917:
! 1918: sock->magic = SOCKET_MAGIC;
! 1919: *socketp = sock;
! 1920:
! 1921: return (ISC_R_SUCCESS);
! 1922:
! 1923: error:
! 1924: if (sock->recvcmsgbuf != NULL)
! 1925: isc_mem_put(manager->mctx, sock->recvcmsgbuf,
! 1926: sock->recvcmsgbuflen);
! 1927: if (sock->sendcmsgbuf != NULL)
! 1928: isc_mem_put(manager->mctx, sock->sendcmsgbuf,
! 1929: sock->sendcmsgbuflen);
! 1930: isc_mem_put(manager->mctx, sock, sizeof(*sock));
! 1931:
! 1932: return (result);
! 1933: }
! 1934:
! 1935: /*
! 1936: * This event requires that the various lists be empty, that the reference
! 1937: * count be 1, and that the magic number is valid. The other socket bits,
! 1938: * like the lock, must be initialized as well. The fd associated must be
! 1939: * marked as closed, by setting it to -1 on close, or this routine will
! 1940: * also close the socket.
! 1941: */
! 1942: static void
! 1943: free_socket(isc_socket_t **socketp) {
! 1944: isc_socket_t *sock = *socketp;
! 1945:
! 1946: INSIST(sock->references == 0);
! 1947: INSIST(VALID_SOCKET(sock));
! 1948: INSIST(!sock->connecting);
! 1949: INSIST(!sock->pending_recv);
! 1950: INSIST(!sock->pending_send);
! 1951: INSIST(!sock->pending_accept);
! 1952: INSIST(ISC_LIST_EMPTY(sock->recv_list));
! 1953: INSIST(ISC_LIST_EMPTY(sock->send_list));
! 1954: INSIST(ISC_LIST_EMPTY(sock->accept_list));
! 1955: INSIST(!ISC_LINK_LINKED(sock, link));
! 1956:
! 1957: if (sock->recvcmsgbuf != NULL)
! 1958: isc_mem_put(sock->manager->mctx, sock->recvcmsgbuf,
! 1959: sock->recvcmsgbuflen);
! 1960: if (sock->sendcmsgbuf != NULL)
! 1961: isc_mem_put(sock->manager->mctx, sock->sendcmsgbuf,
! 1962: sock->sendcmsgbuflen);
! 1963:
! 1964: sock->magic = 0;
! 1965:
! 1966: DESTROYLOCK(&sock->lock);
! 1967:
! 1968: isc_mem_put(sock->manager->mctx, sock, sizeof(*sock));
! 1969:
! 1970: *socketp = NULL;
! 1971: }
! 1972:
! 1973: #ifdef SO_BSDCOMPAT
! 1974: /*
! 1975: * This really should not be necessary to do. Having to workout
! 1976: * which kernel version we are on at run time so that we don't cause
! 1977: * the kernel to issue a warning about us using a deprecated socket option.
! 1978: * Such warnings should *never* be on by default in production kernels.
! 1979: *
! 1980: * We can't do this a build time because executables are moved between
! 1981: * machines and hence kernels.
! 1982: *
! 1983: * We can't just not set SO_BSDCOMAT because some kernels require it.
! 1984: */
! 1985:
! 1986: static isc_once_t bsdcompat_once = ISC_ONCE_INIT;
! 1987: isc_boolean_t bsdcompat = ISC_TRUE;
! 1988:
! 1989: static void
! 1990: clear_bsdcompat(void) {
! 1991: #ifdef __linux__
! 1992: struct utsname buf;
! 1993: char *endp;
! 1994: long int major;
! 1995: long int minor;
! 1996:
! 1997: uname(&buf); /* Can only fail if buf is bad in Linux. */
! 1998:
! 1999: /* Paranoia in parsing can be increased, but we trust uname(). */
! 2000: major = strtol(buf.release, &endp, 10);
! 2001: if (*endp == '.') {
! 2002: minor = strtol(endp+1, &endp, 10);
! 2003: if ((major > 2) || ((major == 2) && (minor >= 4))) {
! 2004: bsdcompat = ISC_FALSE;
! 2005: }
! 2006: }
! 2007: #endif /* __linux __ */
! 2008: }
! 2009: #endif
! 2010:
! 2011: static isc_result_t
! 2012: opensocket(isc_socketmgr_t *manager, isc_socket_t *sock) {
! 2013: char strbuf[ISC_STRERRORSIZE];
! 2014: const char *err = "socket";
! 2015: int tries = 0;
! 2016: #if defined(USE_CMSG) || defined(SO_BSDCOMPAT)
! 2017: int on = 1;
! 2018: #endif
! 2019: #if defined(SO_RCVBUF)
! 2020: ISC_SOCKADDR_LEN_T optlen;
! 2021: int size;
! 2022: #endif
! 2023:
! 2024: again:
! 2025: switch (sock->type) {
! 2026: case isc_sockettype_udp:
! 2027: sock->fd = socket(sock->pf, SOCK_DGRAM, IPPROTO_UDP);
! 2028: break;
! 2029: case isc_sockettype_tcp:
! 2030: sock->fd = socket(sock->pf, SOCK_STREAM, IPPROTO_TCP);
! 2031: break;
! 2032: case isc_sockettype_unix:
! 2033: sock->fd = socket(sock->pf, SOCK_STREAM, 0);
! 2034: break;
! 2035: case isc_sockettype_fdwatch:
! 2036: /*
! 2037: * We should not be called for isc_sockettype_fdwatch sockets.
! 2038: */
! 2039: INSIST(0);
! 2040: break;
! 2041: }
! 2042: if (sock->fd == -1 && errno == EINTR && tries++ < 42)
! 2043: goto again;
! 2044:
! 2045: #ifdef F_DUPFD
! 2046: /*
! 2047: * Leave a space for stdio and TCP to work in.
! 2048: */
! 2049: if (manager->reserved != 0 && sock->type == isc_sockettype_udp &&
! 2050: sock->fd >= 0 && sock->fd < manager->reserved) {
! 2051: int new, tmp;
! 2052: new = fcntl(sock->fd, F_DUPFD, manager->reserved);
! 2053: tmp = errno;
! 2054: (void)close(sock->fd);
! 2055: errno = tmp;
! 2056: sock->fd = new;
! 2057: err = "isc_socket_create: fcntl/reserved";
! 2058: } else if (sock->fd >= 0 && sock->fd < 20) {
! 2059: int new, tmp;
! 2060: new = fcntl(sock->fd, F_DUPFD, 20);
! 2061: tmp = errno;
! 2062: (void)close(sock->fd);
! 2063: errno = tmp;
! 2064: sock->fd = new;
! 2065: err = "isc_socket_create: fcntl";
! 2066: }
! 2067: #endif
! 2068:
! 2069: if (sock->fd >= (int)manager->maxsocks) {
! 2070: (void)close(sock->fd);
! 2071: isc_log_iwrite(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 2072: ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
! 2073: isc_msgcat, ISC_MSGSET_SOCKET,
! 2074: ISC_MSG_TOOMANYFDS,
! 2075: "socket: file descriptor exceeds limit (%d/%u)",
! 2076: sock->fd, manager->maxsocks);
! 2077: return (ISC_R_NORESOURCES);
! 2078: }
! 2079:
! 2080: if (sock->fd < 0) {
! 2081: switch (errno) {
! 2082: case EMFILE:
! 2083: case ENFILE:
! 2084: isc__strerror(errno, strbuf, sizeof(strbuf));
! 2085: isc_log_iwrite(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 2086: ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
! 2087: isc_msgcat, ISC_MSGSET_SOCKET,
! 2088: ISC_MSG_TOOMANYFDS,
! 2089: "%s: %s", err, strbuf);
! 2090: /* fallthrough */
! 2091: case ENOBUFS:
! 2092: return (ISC_R_NORESOURCES);
! 2093:
! 2094: case EPROTONOSUPPORT:
! 2095: case EPFNOSUPPORT:
! 2096: case EAFNOSUPPORT:
! 2097: /*
! 2098: * Linux 2.2 (and maybe others) return EINVAL instead of
! 2099: * EAFNOSUPPORT.
! 2100: */
! 2101: case EINVAL:
! 2102: return (ISC_R_FAMILYNOSUPPORT);
! 2103:
! 2104: default:
! 2105: isc__strerror(errno, strbuf, sizeof(strbuf));
! 2106: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2107: "%s() %s: %s", err,
! 2108: isc_msgcat_get(isc_msgcat,
! 2109: ISC_MSGSET_GENERAL,
! 2110: ISC_MSG_FAILED,
! 2111: "failed"),
! 2112: strbuf);
! 2113: return (ISC_R_UNEXPECTED);
! 2114: }
! 2115: }
! 2116:
! 2117: if (make_nonblock(sock->fd) != ISC_R_SUCCESS) {
! 2118: (void)close(sock->fd);
! 2119: return (ISC_R_UNEXPECTED);
! 2120: }
! 2121:
! 2122: #ifdef SO_BSDCOMPAT
! 2123: RUNTIME_CHECK(isc_once_do(&bsdcompat_once,
! 2124: clear_bsdcompat) == ISC_R_SUCCESS);
! 2125: if (sock->type != isc_sockettype_unix && bsdcompat &&
! 2126: setsockopt(sock->fd, SOL_SOCKET, SO_BSDCOMPAT,
! 2127: (void *)&on, sizeof(on)) < 0) {
! 2128: isc__strerror(errno, strbuf, sizeof(strbuf));
! 2129: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2130: "setsockopt(%d, SO_BSDCOMPAT) %s: %s",
! 2131: sock->fd,
! 2132: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 2133: ISC_MSG_FAILED, "failed"),
! 2134: strbuf);
! 2135: /* Press on... */
! 2136: }
! 2137: #endif
! 2138:
! 2139: #ifdef SO_NOSIGPIPE
! 2140: if (setsockopt(sock->fd, SOL_SOCKET, SO_NOSIGPIPE,
! 2141: (void *)&on, sizeof(on)) < 0) {
! 2142: isc__strerror(errno, strbuf, sizeof(strbuf));
! 2143: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2144: "setsockopt(%d, SO_NOSIGPIPE) %s: %s",
! 2145: sock->fd,
! 2146: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 2147: ISC_MSG_FAILED, "failed"),
! 2148: strbuf);
! 2149: /* Press on... */
! 2150: }
! 2151: #endif
! 2152:
! 2153: #if defined(USE_CMSG) || defined(SO_RCVBUF)
! 2154: if (sock->type == isc_sockettype_udp) {
! 2155:
! 2156: #if defined(USE_CMSG)
! 2157: #if defined(SO_TIMESTAMP)
! 2158: if (setsockopt(sock->fd, SOL_SOCKET, SO_TIMESTAMP,
! 2159: (void *)&on, sizeof(on)) < 0
! 2160: && errno != ENOPROTOOPT) {
! 2161: isc__strerror(errno, strbuf, sizeof(strbuf));
! 2162: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2163: "setsockopt(%d, SO_TIMESTAMP) %s: %s",
! 2164: sock->fd,
! 2165: isc_msgcat_get(isc_msgcat,
! 2166: ISC_MSGSET_GENERAL,
! 2167: ISC_MSG_FAILED,
! 2168: "failed"),
! 2169: strbuf);
! 2170: /* Press on... */
! 2171: }
! 2172: #endif /* SO_TIMESTAMP */
! 2173:
! 2174: #if defined(ISC_PLATFORM_HAVEIPV6)
! 2175: if (sock->pf == AF_INET6 && sock->recvcmsgbuflen == 0U) {
! 2176: /*
! 2177: * Warn explicitly because this anomaly can be hidden
! 2178: * in usual operation (and unexpectedly appear later).
! 2179: */
! 2180: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2181: "No buffer available to receive "
! 2182: "IPv6 destination");
! 2183: }
! 2184: #ifdef ISC_PLATFORM_HAVEIN6PKTINFO
! 2185: #ifdef IPV6_RECVPKTINFO
! 2186: /* RFC 3542 */
! 2187: if ((sock->pf == AF_INET6)
! 2188: && (setsockopt(sock->fd, IPPROTO_IPV6, IPV6_RECVPKTINFO,
! 2189: (void *)&on, sizeof(on)) < 0)) {
! 2190: isc__strerror(errno, strbuf, sizeof(strbuf));
! 2191: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2192: "setsockopt(%d, IPV6_RECVPKTINFO) "
! 2193: "%s: %s", sock->fd,
! 2194: isc_msgcat_get(isc_msgcat,
! 2195: ISC_MSGSET_GENERAL,
! 2196: ISC_MSG_FAILED,
! 2197: "failed"),
! 2198: strbuf);
! 2199: }
! 2200: #else
! 2201: /* RFC 2292 */
! 2202: if ((sock->pf == AF_INET6)
! 2203: && (setsockopt(sock->fd, IPPROTO_IPV6, IPV6_PKTINFO,
! 2204: (void *)&on, sizeof(on)) < 0)) {
! 2205: isc__strerror(errno, strbuf, sizeof(strbuf));
! 2206: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2207: "setsockopt(%d, IPV6_PKTINFO) %s: %s",
! 2208: sock->fd,
! 2209: isc_msgcat_get(isc_msgcat,
! 2210: ISC_MSGSET_GENERAL,
! 2211: ISC_MSG_FAILED,
! 2212: "failed"),
! 2213: strbuf);
! 2214: }
! 2215: #endif /* IPV6_RECVPKTINFO */
! 2216: #endif /* ISC_PLATFORM_HAVEIN6PKTINFO */
! 2217: #ifdef IPV6_USE_MIN_MTU /* RFC 3542, not too common yet*/
! 2218: /* use minimum MTU */
! 2219: if (sock->pf == AF_INET6) {
! 2220: (void)setsockopt(sock->fd, IPPROTO_IPV6,
! 2221: IPV6_USE_MIN_MTU,
! 2222: (void *)&on, sizeof(on));
! 2223: }
! 2224: #endif
! 2225: #endif /* ISC_PLATFORM_HAVEIPV6 */
! 2226: #endif /* defined(USE_CMSG) */
! 2227:
! 2228: #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
! 2229: /*
! 2230: * Turn off Path MTU discovery on IPv4/UDP sockets.
! 2231: */
! 2232: if (sock->pf == AF_INET) {
! 2233: int action = IP_PMTUDISC_DONT;
! 2234: (void)setsockopt(sock->fd, IPPROTO_IP, IP_MTU_DISCOVER,
! 2235: &action, sizeof(action));
! 2236: }
! 2237: #endif
! 2238: #if defined(IP_DONTFRAG)
! 2239: /*
! 2240: * Turn off Path MTU discovery on IPv4/UDP sockets.
! 2241: */
! 2242: if (sock->pf == AF_INET) {
! 2243: int off = 0;
! 2244: (void)setsockopt(sock->fd, IPPROTO_IP, IP_DONTFRAG,
! 2245: &off, sizeof(off));
! 2246: }
! 2247: #endif
! 2248:
! 2249: #if defined(SO_RCVBUF)
! 2250: optlen = sizeof(size);
! 2251: if (getsockopt(sock->fd, SOL_SOCKET, SO_RCVBUF,
! 2252: (void *)&size, &optlen) >= 0 &&
! 2253: size < RCVBUFSIZE) {
! 2254: size = RCVBUFSIZE;
! 2255: if (setsockopt(sock->fd, SOL_SOCKET, SO_RCVBUF,
! 2256: (void *)&size, sizeof(size)) == -1) {
! 2257: isc__strerror(errno, strbuf, sizeof(strbuf));
! 2258: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2259: "setsockopt(%d, SO_RCVBUF, %d) %s: %s",
! 2260: sock->fd, size,
! 2261: isc_msgcat_get(isc_msgcat,
! 2262: ISC_MSGSET_GENERAL,
! 2263: ISC_MSG_FAILED,
! 2264: "failed"),
! 2265: strbuf);
! 2266: }
! 2267: }
! 2268: #endif
! 2269: }
! 2270: #endif /* defined(USE_CMSG) || defined(SO_RCVBUF) */
! 2271:
! 2272: inc_stats(manager->stats, sock->statsindex[STATID_OPEN]);
! 2273:
! 2274: return (ISC_R_SUCCESS);
! 2275: }
! 2276:
! 2277: /*%
! 2278: * Create a new 'type' socket managed by 'manager'. Events
! 2279: * will be posted to 'task' and when dispatched 'action' will be
! 2280: * called with 'arg' as the arg value. The new socket is returned
! 2281: * in 'socketp'.
! 2282: */
! 2283: isc_result_t
! 2284: isc_socket_create(isc_socketmgr_t *manager, int pf, isc_sockettype_t type,
! 2285: isc_socket_t **socketp)
! 2286: {
! 2287: isc_socket_t *sock = NULL;
! 2288: isc_result_t result;
! 2289: int lockid;
! 2290:
! 2291: REQUIRE(VALID_MANAGER(manager));
! 2292: REQUIRE(socketp != NULL && *socketp == NULL);
! 2293: REQUIRE(type != isc_sockettype_fdwatch);
! 2294:
! 2295: result = allocate_socket(manager, type, &sock);
! 2296: if (result != ISC_R_SUCCESS)
! 2297: return (result);
! 2298:
! 2299: switch (sock->type) {
! 2300: case isc_sockettype_udp:
! 2301: sock->statsindex =
! 2302: (pf == AF_INET) ? upd4statsindex : upd6statsindex;
! 2303: break;
! 2304: case isc_sockettype_tcp:
! 2305: sock->statsindex =
! 2306: (pf == AF_INET) ? tcp4statsindex : tcp6statsindex;
! 2307: break;
! 2308: case isc_sockettype_unix:
! 2309: sock->statsindex = unixstatsindex;
! 2310: break;
! 2311: default:
! 2312: INSIST(0);
! 2313: }
! 2314:
! 2315: sock->pf = pf;
! 2316: result = opensocket(manager, sock);
! 2317: if (result != ISC_R_SUCCESS) {
! 2318: inc_stats(manager->stats, sock->statsindex[STATID_OPENFAIL]);
! 2319: free_socket(&sock);
! 2320: return (result);
! 2321: }
! 2322:
! 2323: sock->references = 1;
! 2324: *socketp = sock;
! 2325:
! 2326: /*
! 2327: * Note we don't have to lock the socket like we normally would because
! 2328: * there are no external references to it yet.
! 2329: */
! 2330:
! 2331: lockid = FDLOCK_ID(sock->fd);
! 2332: LOCK(&manager->fdlock[lockid]);
! 2333: manager->fds[sock->fd] = sock;
! 2334: manager->fdstate[sock->fd] = MANAGED;
! 2335: #ifdef USE_DEVPOLL
! 2336: INSIST(sock->manager->fdpollinfo[sock->fd].want_read == 0 &&
! 2337: sock->manager->fdpollinfo[sock->fd].want_write == 0);
! 2338: #endif
! 2339: UNLOCK(&manager->fdlock[lockid]);
! 2340:
! 2341: LOCK(&manager->lock);
! 2342: ISC_LIST_APPEND(manager->socklist, sock, link);
! 2343: #ifdef USE_SELECT
! 2344: if (manager->maxfd < sock->fd)
! 2345: manager->maxfd = sock->fd;
! 2346: #endif
! 2347: UNLOCK(&manager->lock);
! 2348:
! 2349: socket_log(sock, NULL, CREATION, isc_msgcat, ISC_MSGSET_SOCKET,
! 2350: ISC_MSG_CREATED, "created");
! 2351:
! 2352: return (ISC_R_SUCCESS);
! 2353: }
! 2354:
! 2355: isc_result_t
! 2356: isc_socket_open(isc_socket_t *sock) {
! 2357: isc_result_t result;
! 2358:
! 2359: REQUIRE(VALID_SOCKET(sock));
! 2360:
! 2361: LOCK(&sock->lock);
! 2362: REQUIRE(sock->references == 1);
! 2363: REQUIRE(sock->type != isc_sockettype_fdwatch);
! 2364: UNLOCK(&sock->lock);
! 2365: /*
! 2366: * We don't need to retain the lock hereafter, since no one else has
! 2367: * this socket.
! 2368: */
! 2369: REQUIRE(sock->fd == -1);
! 2370:
! 2371: result = opensocket(sock->manager, sock);
! 2372: if (result != ISC_R_SUCCESS)
! 2373: sock->fd = -1;
! 2374:
! 2375: if (result == ISC_R_SUCCESS) {
! 2376: int lockid = FDLOCK_ID(sock->fd);
! 2377:
! 2378: LOCK(&sock->manager->fdlock[lockid]);
! 2379: sock->manager->fds[sock->fd] = sock;
! 2380: sock->manager->fdstate[sock->fd] = MANAGED;
! 2381: #ifdef USE_DEVPOLL
! 2382: INSIST(sock->manager->fdpollinfo[sock->fd].want_read == 0 &&
! 2383: sock->manager->fdpollinfo[sock->fd].want_write == 0);
! 2384: #endif
! 2385: UNLOCK(&sock->manager->fdlock[lockid]);
! 2386:
! 2387: #ifdef USE_SELECT
! 2388: LOCK(&sock->manager->lock);
! 2389: if (sock->manager->maxfd < sock->fd)
! 2390: sock->manager->maxfd = sock->fd;
! 2391: UNLOCK(&sock->manager->lock);
! 2392: #endif
! 2393: }
! 2394:
! 2395: return (result);
! 2396: }
! 2397:
! 2398: /*
! 2399: * Create a new 'type' socket managed by 'manager'. Events
! 2400: * will be posted to 'task' and when dispatched 'action' will be
! 2401: * called with 'arg' as the arg value. The new socket is returned
! 2402: * in 'socketp'.
! 2403: */
! 2404: isc_result_t
! 2405: isc_socket_fdwatchcreate(isc_socketmgr_t *manager, int fd, int flags,
! 2406: isc_sockfdwatch_t callback, void *cbarg,
! 2407: isc_task_t *task, isc_socket_t **socketp)
! 2408: {
! 2409: isc_socket_t *sock = NULL;
! 2410: isc_result_t result;
! 2411: int lockid;
! 2412:
! 2413: REQUIRE(VALID_MANAGER(manager));
! 2414: REQUIRE(socketp != NULL && *socketp == NULL);
! 2415:
! 2416: result = allocate_socket(manager, isc_sockettype_fdwatch, &sock);
! 2417: if (result != ISC_R_SUCCESS)
! 2418: return (result);
! 2419:
! 2420: sock->fd = fd;
! 2421: sock->fdwatcharg = cbarg;
! 2422: sock->fdwatchcb = callback;
! 2423: sock->fdwatchflags = flags;
! 2424: sock->fdwatchtask = task;
! 2425: sock->statsindex = fdwatchstatsindex;
! 2426:
! 2427: sock->references = 1;
! 2428: *socketp = sock;
! 2429:
! 2430: /*
! 2431: * Note we don't have to lock the socket like we normally would because
! 2432: * there are no external references to it yet.
! 2433: */
! 2434:
! 2435: lockid = FDLOCK_ID(sock->fd);
! 2436: LOCK(&manager->fdlock[lockid]);
! 2437: manager->fds[sock->fd] = sock;
! 2438: manager->fdstate[sock->fd] = MANAGED;
! 2439: UNLOCK(&manager->fdlock[lockid]);
! 2440:
! 2441: LOCK(&manager->lock);
! 2442: ISC_LIST_APPEND(manager->socklist, sock, link);
! 2443: #ifdef USE_SELECT
! 2444: if (manager->maxfd < sock->fd)
! 2445: manager->maxfd = sock->fd;
! 2446: #endif
! 2447: UNLOCK(&manager->lock);
! 2448:
! 2449: if (flags & ISC_SOCKFDWATCH_READ)
! 2450: select_poke(sock->manager, sock->fd, SELECT_POKE_READ);
! 2451: if (flags & ISC_SOCKFDWATCH_WRITE)
! 2452: select_poke(sock->manager, sock->fd, SELECT_POKE_WRITE);
! 2453:
! 2454: socket_log(sock, NULL, CREATION, isc_msgcat, ISC_MSGSET_SOCKET,
! 2455: ISC_MSG_CREATED, "fdwatch-created");
! 2456:
! 2457: return (ISC_R_SUCCESS);
! 2458: }
! 2459:
! 2460: /*
! 2461: * Attach to a socket. Caller must explicitly detach when it is done.
! 2462: */
! 2463: void
! 2464: isc_socket_attach(isc_socket_t *sock, isc_socket_t **socketp) {
! 2465: REQUIRE(VALID_SOCKET(sock));
! 2466: REQUIRE(socketp != NULL && *socketp == NULL);
! 2467:
! 2468: LOCK(&sock->lock);
! 2469: sock->references++;
! 2470: UNLOCK(&sock->lock);
! 2471:
! 2472: *socketp = sock;
! 2473: }
! 2474:
! 2475: /*
! 2476: * Dereference a socket. If this is the last reference to it, clean things
! 2477: * up by destroying the socket.
! 2478: */
! 2479: void
! 2480: isc_socket_detach(isc_socket_t **socketp) {
! 2481: isc_socket_t *sock;
! 2482: isc_boolean_t kill_socket = ISC_FALSE;
! 2483:
! 2484: REQUIRE(socketp != NULL);
! 2485: sock = *socketp;
! 2486: REQUIRE(VALID_SOCKET(sock));
! 2487:
! 2488: LOCK(&sock->lock);
! 2489: REQUIRE(sock->references > 0);
! 2490: sock->references--;
! 2491: if (sock->references == 0)
! 2492: kill_socket = ISC_TRUE;
! 2493: UNLOCK(&sock->lock);
! 2494:
! 2495: if (kill_socket)
! 2496: destroy(&sock);
! 2497:
! 2498: *socketp = NULL;
! 2499: }
! 2500:
! 2501: isc_result_t
! 2502: isc_socket_close(isc_socket_t *sock) {
! 2503: int fd;
! 2504: isc_socketmgr_t *manager;
! 2505: isc_sockettype_t type;
! 2506:
! 2507: REQUIRE(VALID_SOCKET(sock));
! 2508:
! 2509: LOCK(&sock->lock);
! 2510:
! 2511: REQUIRE(sock->references == 1);
! 2512: REQUIRE(sock->type != isc_sockettype_fdwatch);
! 2513: REQUIRE(sock->fd >= 0 && sock->fd < (int)sock->manager->maxsocks);
! 2514:
! 2515: INSIST(!sock->connecting);
! 2516: INSIST(!sock->pending_recv);
! 2517: INSIST(!sock->pending_send);
! 2518: INSIST(!sock->pending_accept);
! 2519: INSIST(ISC_LIST_EMPTY(sock->recv_list));
! 2520: INSIST(ISC_LIST_EMPTY(sock->send_list));
! 2521: INSIST(ISC_LIST_EMPTY(sock->accept_list));
! 2522: INSIST(sock->connect_ev == NULL);
! 2523:
! 2524: manager = sock->manager;
! 2525: type = sock->type;
! 2526: fd = sock->fd;
! 2527: sock->fd = -1;
! 2528: memset(sock->name, 0, sizeof(sock->name));
! 2529: sock->tag = NULL;
! 2530: sock->listener = 0;
! 2531: sock->connected = 0;
! 2532: sock->connecting = 0;
! 2533: sock->bound = 0;
! 2534: isc_sockaddr_any(&sock->peer_address);
! 2535:
! 2536: UNLOCK(&sock->lock);
! 2537:
! 2538: closesocket(manager, sock, fd);
! 2539:
! 2540: return (ISC_R_SUCCESS);
! 2541: }
! 2542:
! 2543: /*
! 2544: * I/O is possible on a given socket. Schedule an event to this task that
! 2545: * will call an internal function to do the I/O. This will charge the
! 2546: * task with the I/O operation and let our select loop handler get back
! 2547: * to doing something real as fast as possible.
! 2548: *
! 2549: * The socket and manager must be locked before calling this function.
! 2550: */
! 2551: static void
! 2552: dispatch_recv(isc_socket_t *sock) {
! 2553: intev_t *iev;
! 2554: isc_socketevent_t *ev;
! 2555: isc_task_t *sender;
! 2556:
! 2557: INSIST(!sock->pending_recv);
! 2558:
! 2559: if (sock->type != isc_sockettype_fdwatch) {
! 2560: ev = ISC_LIST_HEAD(sock->recv_list);
! 2561: if (ev == NULL)
! 2562: return;
! 2563: socket_log(sock, NULL, EVENT, NULL, 0, 0,
! 2564: "dispatch_recv: event %p -> task %p",
! 2565: ev, ev->ev_sender);
! 2566: sender = ev->ev_sender;
! 2567: } else {
! 2568: sender = sock->fdwatchtask;
! 2569: }
! 2570:
! 2571: sock->pending_recv = 1;
! 2572: iev = &sock->readable_ev;
! 2573:
! 2574: sock->references++;
! 2575: iev->ev_sender = sock;
! 2576: if (sock->type == isc_sockettype_fdwatch)
! 2577: iev->ev_action = internal_fdwatch_read;
! 2578: else
! 2579: iev->ev_action = internal_recv;
! 2580: iev->ev_arg = sock;
! 2581:
! 2582: isc_task_send(sender, (isc_event_t **)&iev);
! 2583: }
! 2584:
! 2585: static void
! 2586: dispatch_send(isc_socket_t *sock) {
! 2587: intev_t *iev;
! 2588: isc_socketevent_t *ev;
! 2589: isc_task_t *sender;
! 2590:
! 2591: INSIST(!sock->pending_send);
! 2592:
! 2593: if (sock->type != isc_sockettype_fdwatch) {
! 2594: ev = ISC_LIST_HEAD(sock->send_list);
! 2595: if (ev == NULL)
! 2596: return;
! 2597: socket_log(sock, NULL, EVENT, NULL, 0, 0,
! 2598: "dispatch_send: event %p -> task %p",
! 2599: ev, ev->ev_sender);
! 2600: sender = ev->ev_sender;
! 2601: } else {
! 2602: sender = sock->fdwatchtask;
! 2603: }
! 2604:
! 2605: sock->pending_send = 1;
! 2606: iev = &sock->writable_ev;
! 2607:
! 2608: sock->references++;
! 2609: iev->ev_sender = sock;
! 2610: if (sock->type == isc_sockettype_fdwatch)
! 2611: iev->ev_action = internal_fdwatch_write;
! 2612: else
! 2613: iev->ev_action = internal_send;
! 2614: iev->ev_arg = sock;
! 2615:
! 2616: isc_task_send(sender, (isc_event_t **)&iev);
! 2617: }
! 2618:
! 2619: /*
! 2620: * Dispatch an internal accept event.
! 2621: */
! 2622: static void
! 2623: dispatch_accept(isc_socket_t *sock) {
! 2624: intev_t *iev;
! 2625: isc_socket_newconnev_t *ev;
! 2626:
! 2627: INSIST(!sock->pending_accept);
! 2628:
! 2629: /*
! 2630: * Are there any done events left, or were they all canceled
! 2631: * before the manager got the socket lock?
! 2632: */
! 2633: ev = ISC_LIST_HEAD(sock->accept_list);
! 2634: if (ev == NULL)
! 2635: return;
! 2636:
! 2637: sock->pending_accept = 1;
! 2638: iev = &sock->readable_ev;
! 2639:
! 2640: sock->references++; /* keep socket around for this internal event */
! 2641: iev->ev_sender = sock;
! 2642: iev->ev_action = internal_accept;
! 2643: iev->ev_arg = sock;
! 2644:
! 2645: isc_task_send(ev->ev_sender, (isc_event_t **)&iev);
! 2646: }
! 2647:
! 2648: static void
! 2649: dispatch_connect(isc_socket_t *sock) {
! 2650: intev_t *iev;
! 2651: isc_socket_connev_t *ev;
! 2652:
! 2653: iev = &sock->writable_ev;
! 2654:
! 2655: ev = sock->connect_ev;
! 2656: INSIST(ev != NULL); /* XXX */
! 2657:
! 2658: INSIST(sock->connecting);
! 2659:
! 2660: sock->references++; /* keep socket around for this internal event */
! 2661: iev->ev_sender = sock;
! 2662: iev->ev_action = internal_connect;
! 2663: iev->ev_arg = sock;
! 2664:
! 2665: isc_task_send(ev->ev_sender, (isc_event_t **)&iev);
! 2666: }
! 2667:
! 2668: /*
! 2669: * Dequeue an item off the given socket's read queue, set the result code
! 2670: * in the done event to the one provided, and send it to the task it was
! 2671: * destined for.
! 2672: *
! 2673: * If the event to be sent is on a list, remove it before sending. If
! 2674: * asked to, send and detach from the socket as well.
! 2675: *
! 2676: * Caller must have the socket locked if the event is attached to the socket.
! 2677: */
! 2678: static void
! 2679: send_recvdone_event(isc_socket_t *sock, isc_socketevent_t **dev) {
! 2680: isc_task_t *task;
! 2681:
! 2682: task = (*dev)->ev_sender;
! 2683:
! 2684: (*dev)->ev_sender = sock;
! 2685:
! 2686: if (ISC_LINK_LINKED(*dev, ev_link))
! 2687: ISC_LIST_DEQUEUE(sock->recv_list, *dev, ev_link);
! 2688:
! 2689: if (((*dev)->attributes & ISC_SOCKEVENTATTR_ATTACHED)
! 2690: == ISC_SOCKEVENTATTR_ATTACHED)
! 2691: isc_task_sendanddetach(&task, (isc_event_t **)dev);
! 2692: else
! 2693: isc_task_send(task, (isc_event_t **)dev);
! 2694: }
! 2695:
! 2696: /*
! 2697: * See comments for send_recvdone_event() above.
! 2698: *
! 2699: * Caller must have the socket locked if the event is attached to the socket.
! 2700: */
! 2701: static void
! 2702: send_senddone_event(isc_socket_t *sock, isc_socketevent_t **dev) {
! 2703: isc_task_t *task;
! 2704:
! 2705: INSIST(dev != NULL && *dev != NULL);
! 2706:
! 2707: task = (*dev)->ev_sender;
! 2708: (*dev)->ev_sender = sock;
! 2709:
! 2710: if (ISC_LINK_LINKED(*dev, ev_link))
! 2711: ISC_LIST_DEQUEUE(sock->send_list, *dev, ev_link);
! 2712:
! 2713: if (((*dev)->attributes & ISC_SOCKEVENTATTR_ATTACHED)
! 2714: == ISC_SOCKEVENTATTR_ATTACHED)
! 2715: isc_task_sendanddetach(&task, (isc_event_t **)dev);
! 2716: else
! 2717: isc_task_send(task, (isc_event_t **)dev);
! 2718: }
! 2719:
! 2720: /*
! 2721: * Call accept() on a socket, to get the new file descriptor. The listen
! 2722: * socket is used as a prototype to create a new isc_socket_t. The new
! 2723: * socket has one outstanding reference. The task receiving the event
! 2724: * will be detached from just after the event is delivered.
! 2725: *
! 2726: * On entry to this function, the event delivered is the internal
! 2727: * readable event, and the first item on the accept_list should be
! 2728: * the done event we want to send. If the list is empty, this is a no-op,
! 2729: * so just unlock and return.
! 2730: */
! 2731: static void
! 2732: internal_accept(isc_task_t *me, isc_event_t *ev) {
! 2733: isc_socket_t *sock;
! 2734: isc_socketmgr_t *manager;
! 2735: isc_socket_newconnev_t *dev;
! 2736: isc_task_t *task;
! 2737: ISC_SOCKADDR_LEN_T addrlen;
! 2738: int fd;
! 2739: isc_result_t result = ISC_R_SUCCESS;
! 2740: char strbuf[ISC_STRERRORSIZE];
! 2741: const char *err = "accept";
! 2742:
! 2743: UNUSED(me);
! 2744:
! 2745: sock = ev->ev_sender;
! 2746: INSIST(VALID_SOCKET(sock));
! 2747:
! 2748: LOCK(&sock->lock);
! 2749: socket_log(sock, NULL, TRACE,
! 2750: isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_ACCEPTLOCK,
! 2751: "internal_accept called, locked socket");
! 2752:
! 2753: manager = sock->manager;
! 2754: INSIST(VALID_MANAGER(manager));
! 2755:
! 2756: INSIST(sock->listener);
! 2757: INSIST(sock->pending_accept == 1);
! 2758: sock->pending_accept = 0;
! 2759:
! 2760: INSIST(sock->references > 0);
! 2761: sock->references--; /* the internal event is done with this socket */
! 2762: if (sock->references == 0) {
! 2763: UNLOCK(&sock->lock);
! 2764: destroy(&sock);
! 2765: return;
! 2766: }
! 2767:
! 2768: /*
! 2769: * Get the first item off the accept list.
! 2770: * If it is empty, unlock the socket and return.
! 2771: */
! 2772: dev = ISC_LIST_HEAD(sock->accept_list);
! 2773: if (dev == NULL) {
! 2774: UNLOCK(&sock->lock);
! 2775: return;
! 2776: }
! 2777:
! 2778: /*
! 2779: * Try to accept the new connection. If the accept fails with
! 2780: * EAGAIN or EINTR, simply poke the watcher to watch this socket
! 2781: * again. Also ignore ECONNRESET, which has been reported to
! 2782: * be spuriously returned on Linux 2.2.19 although it is not
! 2783: * a documented error for accept(). ECONNABORTED has been
! 2784: * reported for Solaris 8. The rest are thrown in not because
! 2785: * we have seen them but because they are ignored by other
! 2786: * daemons such as BIND 8 and Apache.
! 2787: */
! 2788:
! 2789: addrlen = sizeof(dev->newsocket->peer_address.type);
! 2790: memset(&dev->newsocket->peer_address.type, 0, addrlen);
! 2791: fd = accept(sock->fd, &dev->newsocket->peer_address.type.sa,
! 2792: (void *)&addrlen);
! 2793:
! 2794: #ifdef F_DUPFD
! 2795: /*
! 2796: * Leave a space for stdio to work in.
! 2797: */
! 2798: if (fd >= 0 && fd < 20) {
! 2799: int new, tmp;
! 2800: new = fcntl(fd, F_DUPFD, 20);
! 2801: tmp = errno;
! 2802: (void)close(fd);
! 2803: errno = tmp;
! 2804: fd = new;
! 2805: err = "accept/fcntl";
! 2806: }
! 2807: #endif
! 2808:
! 2809: if (fd < 0) {
! 2810: if (SOFT_ERROR(errno))
! 2811: goto soft_error;
! 2812: switch (errno) {
! 2813: case ENFILE:
! 2814: case EMFILE:
! 2815: isc_log_iwrite(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 2816: ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
! 2817: isc_msgcat, ISC_MSGSET_SOCKET,
! 2818: ISC_MSG_TOOMANYFDS,
! 2819: "%s: too many open file descriptors",
! 2820: err);
! 2821: goto soft_error;
! 2822:
! 2823: case ENOBUFS:
! 2824: case ENOMEM:
! 2825: case ECONNRESET:
! 2826: case ECONNABORTED:
! 2827: case EHOSTUNREACH:
! 2828: case EHOSTDOWN:
! 2829: case ENETUNREACH:
! 2830: case ENETDOWN:
! 2831: case ECONNREFUSED:
! 2832: #ifdef EPROTO
! 2833: case EPROTO:
! 2834: #endif
! 2835: #ifdef ENONET
! 2836: case ENONET:
! 2837: #endif
! 2838: goto soft_error;
! 2839: default:
! 2840: break;
! 2841: }
! 2842: isc__strerror(errno, strbuf, sizeof(strbuf));
! 2843: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2844: "internal_accept: %s() %s: %s", err,
! 2845: isc_msgcat_get(isc_msgcat,
! 2846: ISC_MSGSET_GENERAL,
! 2847: ISC_MSG_FAILED,
! 2848: "failed"),
! 2849: strbuf);
! 2850: fd = -1;
! 2851: result = ISC_R_UNEXPECTED;
! 2852: } else {
! 2853: if (addrlen == 0U) {
! 2854: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2855: "internal_accept(): "
! 2856: "accept() failed to return "
! 2857: "remote address");
! 2858:
! 2859: (void)close(fd);
! 2860: goto soft_error;
! 2861: } else if (dev->newsocket->peer_address.type.sa.sa_family !=
! 2862: sock->pf)
! 2863: {
! 2864: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 2865: "internal_accept(): "
! 2866: "accept() returned peer address "
! 2867: "family %u (expected %u)",
! 2868: dev->newsocket->peer_address.
! 2869: type.sa.sa_family,
! 2870: sock->pf);
! 2871: (void)close(fd);
! 2872: goto soft_error;
! 2873: } else if (fd >= (int)manager->maxsocks) {
! 2874: isc_log_iwrite(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 2875: ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
! 2876: isc_msgcat, ISC_MSGSET_SOCKET,
! 2877: ISC_MSG_TOOMANYFDS,
! 2878: "accept: "
! 2879: "file descriptor exceeds limit (%d/%u)",
! 2880: fd, manager->maxsocks);
! 2881: (void)close(fd);
! 2882: goto soft_error;
! 2883: }
! 2884: }
! 2885:
! 2886: if (fd != -1) {
! 2887: dev->newsocket->peer_address.length = addrlen;
! 2888: dev->newsocket->pf = sock->pf;
! 2889: }
! 2890:
! 2891: /*
! 2892: * Pull off the done event.
! 2893: */
! 2894: ISC_LIST_UNLINK(sock->accept_list, dev, ev_link);
! 2895:
! 2896: /*
! 2897: * Poke watcher if there are more pending accepts.
! 2898: */
! 2899: if (!ISC_LIST_EMPTY(sock->accept_list))
! 2900: select_poke(sock->manager, sock->fd, SELECT_POKE_ACCEPT);
! 2901:
! 2902: UNLOCK(&sock->lock);
! 2903:
! 2904: if (fd != -1 && (make_nonblock(fd) != ISC_R_SUCCESS)) {
! 2905: (void)close(fd);
! 2906: fd = -1;
! 2907: result = ISC_R_UNEXPECTED;
! 2908: }
! 2909:
! 2910: /*
! 2911: * -1 means the new socket didn't happen.
! 2912: */
! 2913: if (fd != -1) {
! 2914: int lockid = FDLOCK_ID(fd);
! 2915:
! 2916: LOCK(&manager->fdlock[lockid]);
! 2917: manager->fds[fd] = dev->newsocket;
! 2918: manager->fdstate[fd] = MANAGED;
! 2919: UNLOCK(&manager->fdlock[lockid]);
! 2920:
! 2921: LOCK(&manager->lock);
! 2922: ISC_LIST_APPEND(manager->socklist, dev->newsocket, link);
! 2923:
! 2924: dev->newsocket->fd = fd;
! 2925: dev->newsocket->bound = 1;
! 2926: dev->newsocket->connected = 1;
! 2927:
! 2928: /*
! 2929: * Save away the remote address
! 2930: */
! 2931: dev->address = dev->newsocket->peer_address;
! 2932:
! 2933: #ifdef USE_SELECT
! 2934: if (manager->maxfd < fd)
! 2935: manager->maxfd = fd;
! 2936: #endif
! 2937:
! 2938: socket_log(sock, &dev->newsocket->peer_address, CREATION,
! 2939: isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_ACCEPTEDCXN,
! 2940: "accepted connection, new socket %p",
! 2941: dev->newsocket);
! 2942:
! 2943: UNLOCK(&manager->lock);
! 2944:
! 2945: inc_stats(manager->stats, sock->statsindex[STATID_ACCEPT]);
! 2946: } else {
! 2947: inc_stats(manager->stats, sock->statsindex[STATID_ACCEPTFAIL]);
! 2948: dev->newsocket->references--;
! 2949: free_socket(&dev->newsocket);
! 2950: }
! 2951:
! 2952: /*
! 2953: * Fill in the done event details and send it off.
! 2954: */
! 2955: dev->result = result;
! 2956: task = dev->ev_sender;
! 2957: dev->ev_sender = sock;
! 2958:
! 2959: isc_task_sendanddetach(&task, ISC_EVENT_PTR(&dev));
! 2960: return;
! 2961:
! 2962: soft_error:
! 2963: select_poke(sock->manager, sock->fd, SELECT_POKE_ACCEPT);
! 2964: UNLOCK(&sock->lock);
! 2965:
! 2966: inc_stats(manager->stats, sock->statsindex[STATID_ACCEPTFAIL]);
! 2967: return;
! 2968: }
! 2969:
! 2970: static void
! 2971: internal_recv(isc_task_t *me, isc_event_t *ev) {
! 2972: isc_socketevent_t *dev;
! 2973: isc_socket_t *sock;
! 2974:
! 2975: INSIST(ev->ev_type == ISC_SOCKEVENT_INTR);
! 2976:
! 2977: sock = ev->ev_sender;
! 2978: INSIST(VALID_SOCKET(sock));
! 2979:
! 2980: LOCK(&sock->lock);
! 2981: socket_log(sock, NULL, IOEVENT,
! 2982: isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_INTERNALRECV,
! 2983: "internal_recv: task %p got event %p", me, ev);
! 2984:
! 2985: INSIST(sock->pending_recv == 1);
! 2986: sock->pending_recv = 0;
! 2987:
! 2988: INSIST(sock->references > 0);
! 2989: sock->references--; /* the internal event is done with this socket */
! 2990: if (sock->references == 0) {
! 2991: UNLOCK(&sock->lock);
! 2992: destroy(&sock);
! 2993: return;
! 2994: }
! 2995:
! 2996: /*
! 2997: * Try to do as much I/O as possible on this socket. There are no
! 2998: * limits here, currently.
! 2999: */
! 3000: dev = ISC_LIST_HEAD(sock->recv_list);
! 3001: while (dev != NULL) {
! 3002: switch (doio_recv(sock, dev)) {
! 3003: case DOIO_SOFT:
! 3004: goto poke;
! 3005:
! 3006: case DOIO_EOF:
! 3007: /*
! 3008: * read of 0 means the remote end was closed.
! 3009: * Run through the event queue and dispatch all
! 3010: * the events with an EOF result code.
! 3011: */
! 3012: do {
! 3013: dev->result = ISC_R_EOF;
! 3014: send_recvdone_event(sock, &dev);
! 3015: dev = ISC_LIST_HEAD(sock->recv_list);
! 3016: } while (dev != NULL);
! 3017: goto poke;
! 3018:
! 3019: case DOIO_SUCCESS:
! 3020: case DOIO_HARD:
! 3021: send_recvdone_event(sock, &dev);
! 3022: break;
! 3023: }
! 3024:
! 3025: dev = ISC_LIST_HEAD(sock->recv_list);
! 3026: }
! 3027:
! 3028: poke:
! 3029: if (!ISC_LIST_EMPTY(sock->recv_list))
! 3030: select_poke(sock->manager, sock->fd, SELECT_POKE_READ);
! 3031:
! 3032: UNLOCK(&sock->lock);
! 3033: }
! 3034:
! 3035: static void
! 3036: internal_send(isc_task_t *me, isc_event_t *ev) {
! 3037: isc_socketevent_t *dev;
! 3038: isc_socket_t *sock;
! 3039:
! 3040: INSIST(ev->ev_type == ISC_SOCKEVENT_INTW);
! 3041:
! 3042: /*
! 3043: * Find out what socket this is and lock it.
! 3044: */
! 3045: sock = (isc_socket_t *)ev->ev_sender;
! 3046: INSIST(VALID_SOCKET(sock));
! 3047:
! 3048: LOCK(&sock->lock);
! 3049: socket_log(sock, NULL, IOEVENT,
! 3050: isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_INTERNALSEND,
! 3051: "internal_send: task %p got event %p", me, ev);
! 3052:
! 3053: INSIST(sock->pending_send == 1);
! 3054: sock->pending_send = 0;
! 3055:
! 3056: INSIST(sock->references > 0);
! 3057: sock->references--; /* the internal event is done with this socket */
! 3058: if (sock->references == 0) {
! 3059: UNLOCK(&sock->lock);
! 3060: destroy(&sock);
! 3061: return;
! 3062: }
! 3063:
! 3064: /*
! 3065: * Try to do as much I/O as possible on this socket. There are no
! 3066: * limits here, currently.
! 3067: */
! 3068: dev = ISC_LIST_HEAD(sock->send_list);
! 3069: while (dev != NULL) {
! 3070: switch (doio_send(sock, dev)) {
! 3071: case DOIO_SOFT:
! 3072: goto poke;
! 3073:
! 3074: case DOIO_HARD:
! 3075: case DOIO_SUCCESS:
! 3076: send_senddone_event(sock, &dev);
! 3077: break;
! 3078: }
! 3079:
! 3080: dev = ISC_LIST_HEAD(sock->send_list);
! 3081: }
! 3082:
! 3083: poke:
! 3084: if (!ISC_LIST_EMPTY(sock->send_list))
! 3085: select_poke(sock->manager, sock->fd, SELECT_POKE_WRITE);
! 3086:
! 3087: UNLOCK(&sock->lock);
! 3088: }
! 3089:
! 3090: static void
! 3091: internal_fdwatch_write(isc_task_t *me, isc_event_t *ev) {
! 3092: isc_socket_t *sock;
! 3093: int more_data;
! 3094:
! 3095: INSIST(ev->ev_type == ISC_SOCKEVENT_INTW);
! 3096:
! 3097: /*
! 3098: * Find out what socket this is and lock it.
! 3099: */
! 3100: sock = (isc_socket_t *)ev->ev_sender;
! 3101: INSIST(VALID_SOCKET(sock));
! 3102:
! 3103: LOCK(&sock->lock);
! 3104: socket_log(sock, NULL, IOEVENT,
! 3105: isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_INTERNALSEND,
! 3106: "internal_fdwatch_write: task %p got event %p", me, ev);
! 3107:
! 3108: INSIST(sock->pending_send == 1);
! 3109:
! 3110: UNLOCK(&sock->lock);
! 3111: more_data = (sock->fdwatchcb)(me, sock, sock->fdwatcharg);
! 3112: LOCK(&sock->lock);
! 3113:
! 3114: sock->pending_send = 0;
! 3115:
! 3116: INSIST(sock->references > 0);
! 3117: sock->references--; /* the internal event is done with this socket */
! 3118: if (sock->references == 0) {
! 3119: UNLOCK(&sock->lock);
! 3120: destroy(&sock);
! 3121: return;
! 3122: }
! 3123:
! 3124: if (more_data)
! 3125: select_poke(sock->manager, sock->fd, SELECT_POKE_WRITE);
! 3126:
! 3127: UNLOCK(&sock->lock);
! 3128: }
! 3129:
! 3130: static void
! 3131: internal_fdwatch_read(isc_task_t *me, isc_event_t *ev) {
! 3132: isc_socket_t *sock;
! 3133: int more_data;
! 3134:
! 3135: INSIST(ev->ev_type == ISC_SOCKEVENT_INTR);
! 3136:
! 3137: /*
! 3138: * Find out what socket this is and lock it.
! 3139: */
! 3140: sock = (isc_socket_t *)ev->ev_sender;
! 3141: INSIST(VALID_SOCKET(sock));
! 3142:
! 3143: LOCK(&sock->lock);
! 3144: socket_log(sock, NULL, IOEVENT,
! 3145: isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_INTERNALRECV,
! 3146: "internal_fdwatch_read: task %p got event %p", me, ev);
! 3147:
! 3148: INSIST(sock->pending_recv == 1);
! 3149:
! 3150: UNLOCK(&sock->lock);
! 3151: more_data = (sock->fdwatchcb)(me, sock, sock->fdwatcharg);
! 3152: LOCK(&sock->lock);
! 3153:
! 3154: sock->pending_recv = 0;
! 3155:
! 3156: INSIST(sock->references > 0);
! 3157: sock->references--; /* the internal event is done with this socket */
! 3158: if (sock->references == 0) {
! 3159: UNLOCK(&sock->lock);
! 3160: destroy(&sock);
! 3161: return;
! 3162: }
! 3163:
! 3164: if (more_data)
! 3165: select_poke(sock->manager, sock->fd, SELECT_POKE_READ);
! 3166:
! 3167: UNLOCK(&sock->lock);
! 3168: }
! 3169:
! 3170: /*
! 3171: * Process read/writes on each fd here. Avoid locking
! 3172: * and unlocking twice if both reads and writes are possible.
! 3173: */
! 3174: static void
! 3175: process_fd(isc_socketmgr_t *manager, int fd, isc_boolean_t readable,
! 3176: isc_boolean_t writeable)
! 3177: {
! 3178: isc_socket_t *sock;
! 3179: isc_boolean_t unlock_sock;
! 3180: isc_boolean_t unwatch_read = ISC_FALSE, unwatch_write = ISC_FALSE;
! 3181: int lockid = FDLOCK_ID(fd);
! 3182:
! 3183: /*
! 3184: * If the socket is going to be closed, don't do more I/O.
! 3185: */
! 3186: LOCK(&manager->fdlock[lockid]);
! 3187: if (manager->fdstate[fd] == CLOSE_PENDING) {
! 3188: UNLOCK(&manager->fdlock[lockid]);
! 3189:
! 3190: (void)unwatch_fd(manager, fd, SELECT_POKE_READ);
! 3191: (void)unwatch_fd(manager, fd, SELECT_POKE_WRITE);
! 3192: return;
! 3193: }
! 3194:
! 3195: sock = manager->fds[fd];
! 3196: unlock_sock = ISC_FALSE;
! 3197: if (readable) {
! 3198: if (sock == NULL) {
! 3199: unwatch_read = ISC_TRUE;
! 3200: goto check_write;
! 3201: }
! 3202: unlock_sock = ISC_TRUE;
! 3203: LOCK(&sock->lock);
! 3204: if (!SOCK_DEAD(sock)) {
! 3205: if (sock->listener)
! 3206: dispatch_accept(sock);
! 3207: else
! 3208: dispatch_recv(sock);
! 3209: }
! 3210: unwatch_read = ISC_TRUE;
! 3211: }
! 3212: check_write:
! 3213: if (writeable) {
! 3214: if (sock == NULL) {
! 3215: unwatch_write = ISC_TRUE;
! 3216: goto unlock_fd;
! 3217: }
! 3218: if (!unlock_sock) {
! 3219: unlock_sock = ISC_TRUE;
! 3220: LOCK(&sock->lock);
! 3221: }
! 3222: if (!SOCK_DEAD(sock)) {
! 3223: if (sock->connecting)
! 3224: dispatch_connect(sock);
! 3225: else
! 3226: dispatch_send(sock);
! 3227: }
! 3228: unwatch_write = ISC_TRUE;
! 3229: }
! 3230: if (unlock_sock)
! 3231: UNLOCK(&sock->lock);
! 3232:
! 3233: unlock_fd:
! 3234: UNLOCK(&manager->fdlock[lockid]);
! 3235: if (unwatch_read)
! 3236: (void)unwatch_fd(manager, fd, SELECT_POKE_READ);
! 3237: if (unwatch_write)
! 3238: (void)unwatch_fd(manager, fd, SELECT_POKE_WRITE);
! 3239:
! 3240: }
! 3241:
! 3242: #ifdef USE_KQUEUE
! 3243: static isc_boolean_t
! 3244: process_fds(isc_socketmgr_t *manager, struct kevent *events, int nevents) {
! 3245: int i;
! 3246: isc_boolean_t readable, writable;
! 3247: isc_boolean_t done = ISC_FALSE;
! 3248: #ifdef ISC_PLATFORM_USETHREADS
! 3249: isc_boolean_t have_ctlevent = ISC_FALSE;
! 3250: #endif
! 3251:
! 3252: if (nevents == manager->nevents) {
! 3253: /*
! 3254: * This is not an error, but something unexpected. If this
! 3255: * happens, it may indicate the need for increasing
! 3256: * ISC_SOCKET_MAXEVENTS.
! 3257: */
! 3258: manager_log(manager, ISC_LOGCATEGORY_GENERAL,
! 3259: ISC_LOGMODULE_SOCKET, ISC_LOG_INFO,
! 3260: "maximum number of FD events (%d) received",
! 3261: nevents);
! 3262: }
! 3263:
! 3264: for (i = 0; i < nevents; i++) {
! 3265: REQUIRE(events[i].ident < manager->maxsocks);
! 3266: #ifdef ISC_PLATFORM_USETHREADS
! 3267: if (events[i].ident == (uintptr_t)manager->pipe_fds[0]) {
! 3268: have_ctlevent = ISC_TRUE;
! 3269: continue;
! 3270: }
! 3271: #endif
! 3272: readable = ISC_TF(events[i].filter == EVFILT_READ);
! 3273: writable = ISC_TF(events[i].filter == EVFILT_WRITE);
! 3274: process_fd(manager, events[i].ident, readable, writable);
! 3275: }
! 3276:
! 3277: #ifdef ISC_PLATFORM_USETHREADS
! 3278: if (have_ctlevent)
! 3279: done = process_ctlfd(manager);
! 3280: #endif
! 3281:
! 3282: return (done);
! 3283: }
! 3284: #elif defined(USE_EPOLL)
! 3285: static isc_boolean_t
! 3286: process_fds(isc_socketmgr_t *manager, struct epoll_event *events, int nevents) {
! 3287: int i;
! 3288: isc_boolean_t done = ISC_FALSE;
! 3289: #ifdef ISC_PLATFORM_USETHREADS
! 3290: isc_boolean_t have_ctlevent = ISC_FALSE;
! 3291: #endif
! 3292:
! 3293: if (nevents == manager->nevents) {
! 3294: manager_log(manager, ISC_LOGCATEGORY_GENERAL,
! 3295: ISC_LOGMODULE_SOCKET, ISC_LOG_INFO,
! 3296: "maximum number of FD events (%d) received",
! 3297: nevents);
! 3298: }
! 3299:
! 3300: for (i = 0; i < nevents; i++) {
! 3301: REQUIRE(events[i].data.fd < (int)manager->maxsocks);
! 3302: #ifdef ISC_PLATFORM_USETHREADS
! 3303: if (events[i].data.fd == manager->pipe_fds[0]) {
! 3304: have_ctlevent = ISC_TRUE;
! 3305: continue;
! 3306: }
! 3307: #endif
! 3308: if ((events[i].events & EPOLLERR) != 0 ||
! 3309: (events[i].events & EPOLLHUP) != 0) {
! 3310: /*
! 3311: * epoll does not set IN/OUT bits on an erroneous
! 3312: * condition, so we need to try both anyway. This is a
! 3313: * bit inefficient, but should be okay for such rare
! 3314: * events. Note also that the read or write attempt
! 3315: * won't block because we use non-blocking sockets.
! 3316: */
! 3317: events[i].events |= (EPOLLIN | EPOLLOUT);
! 3318: }
! 3319: process_fd(manager, events[i].data.fd,
! 3320: (events[i].events & EPOLLIN) != 0,
! 3321: (events[i].events & EPOLLOUT) != 0);
! 3322: }
! 3323:
! 3324: #ifdef ISC_PLATFORM_USETHREADS
! 3325: if (have_ctlevent)
! 3326: done = process_ctlfd(manager);
! 3327: #endif
! 3328:
! 3329: return (done);
! 3330: }
! 3331: #elif defined(USE_DEVPOLL)
! 3332: static isc_boolean_t
! 3333: process_fds(isc_socketmgr_t *manager, struct pollfd *events, int nevents) {
! 3334: int i;
! 3335: isc_boolean_t done = ISC_FALSE;
! 3336: #ifdef ISC_PLATFORM_USETHREADS
! 3337: isc_boolean_t have_ctlevent = ISC_FALSE;
! 3338: #endif
! 3339:
! 3340: if (nevents == manager->nevents) {
! 3341: manager_log(manager, ISC_LOGCATEGORY_GENERAL,
! 3342: ISC_LOGMODULE_SOCKET, ISC_LOG_INFO,
! 3343: "maximum number of FD events (%d) received",
! 3344: nevents);
! 3345: }
! 3346:
! 3347: for (i = 0; i < nevents; i++) {
! 3348: REQUIRE(events[i].fd < (int)manager->maxsocks);
! 3349: #ifdef ISC_PLATFORM_USETHREADS
! 3350: if (events[i].fd == manager->pipe_fds[0]) {
! 3351: have_ctlevent = ISC_TRUE;
! 3352: continue;
! 3353: }
! 3354: #endif
! 3355: process_fd(manager, events[i].fd,
! 3356: (events[i].events & POLLIN) != 0,
! 3357: (events[i].events & POLLOUT) != 0);
! 3358: }
! 3359:
! 3360: #ifdef ISC_PLATFORM_USETHREADS
! 3361: if (have_ctlevent)
! 3362: done = process_ctlfd(manager);
! 3363: #endif
! 3364:
! 3365: return (done);
! 3366: }
! 3367: #elif defined(USE_SELECT)
! 3368: static void
! 3369: process_fds(isc_socketmgr_t *manager, int maxfd,
! 3370: fd_set *readfds, fd_set *writefds)
! 3371: {
! 3372: int i;
! 3373:
! 3374: REQUIRE(maxfd <= (int)manager->maxsocks);
! 3375:
! 3376: for (i = 0; i < maxfd; i++) {
! 3377: #ifdef ISC_PLATFORM_USETHREADS
! 3378: if (i == manager->pipe_fds[0] || i == manager->pipe_fds[1])
! 3379: continue;
! 3380: #endif /* ISC_PLATFORM_USETHREADS */
! 3381: process_fd(manager, i, FD_ISSET(i, readfds),
! 3382: FD_ISSET(i, writefds));
! 3383: }
! 3384: }
! 3385: #endif
! 3386:
! 3387: #ifdef ISC_PLATFORM_USETHREADS
! 3388: static isc_boolean_t
! 3389: process_ctlfd(isc_socketmgr_t *manager) {
! 3390: int msg, fd;
! 3391:
! 3392: for (;;) {
! 3393: select_readmsg(manager, &fd, &msg);
! 3394:
! 3395: manager_log(manager, IOEVENT,
! 3396: isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKET,
! 3397: ISC_MSG_WATCHERMSG,
! 3398: "watcher got message %d "
! 3399: "for socket %d"), msg, fd);
! 3400:
! 3401: /*
! 3402: * Nothing to read?
! 3403: */
! 3404: if (msg == SELECT_POKE_NOTHING)
! 3405: break;
! 3406:
! 3407: /*
! 3408: * Handle shutdown message. We really should
! 3409: * jump out of this loop right away, but
! 3410: * it doesn't matter if we have to do a little
! 3411: * more work first.
! 3412: */
! 3413: if (msg == SELECT_POKE_SHUTDOWN)
! 3414: return (ISC_TRUE);
! 3415:
! 3416: /*
! 3417: * This is a wakeup on a socket. Look
! 3418: * at the event queue for both read and write,
! 3419: * and decide if we need to watch on it now
! 3420: * or not.
! 3421: */
! 3422: wakeup_socket(manager, fd, msg);
! 3423: }
! 3424:
! 3425: return (ISC_FALSE);
! 3426: }
! 3427:
! 3428: /*
! 3429: * This is the thread that will loop forever, always in a select or poll
! 3430: * call.
! 3431: *
! 3432: * When select returns something to do, track down what thread gets to do
! 3433: * this I/O and post the event to it.
! 3434: */
! 3435: static isc_threadresult_t
! 3436: watcher(void *uap) {
! 3437: isc_socketmgr_t *manager = uap;
! 3438: isc_boolean_t done;
! 3439: int ctlfd;
! 3440: int cc;
! 3441: #ifdef USE_KQUEUE
! 3442: const char *fnname = "kevent()";
! 3443: #elif defined (USE_EPOLL)
! 3444: const char *fnname = "epoll_wait()";
! 3445: #elif defined(USE_DEVPOLL)
! 3446: const char *fnname = "ioctl(DP_POLL)";
! 3447: struct dvpoll dvp;
! 3448: #elif defined (USE_SELECT)
! 3449: const char *fnname = "select()";
! 3450: int maxfd;
! 3451: #endif
! 3452: char strbuf[ISC_STRERRORSIZE];
! 3453: #ifdef ISC_SOCKET_USE_POLLWATCH
! 3454: pollstate_t pollstate = poll_idle;
! 3455: #endif
! 3456:
! 3457: /*
! 3458: * Get the control fd here. This will never change.
! 3459: */
! 3460: ctlfd = manager->pipe_fds[0];
! 3461: done = ISC_FALSE;
! 3462: while (!done) {
! 3463: do {
! 3464: #ifdef USE_KQUEUE
! 3465: cc = kevent(manager->kqueue_fd, NULL, 0,
! 3466: manager->events, manager->nevents, NULL);
! 3467: #elif defined(USE_EPOLL)
! 3468: cc = epoll_wait(manager->epoll_fd, manager->events,
! 3469: manager->nevents, -1);
! 3470: #elif defined(USE_DEVPOLL)
! 3471: dvp.dp_fds = manager->events;
! 3472: dvp.dp_nfds = manager->nevents;
! 3473: #ifndef ISC_SOCKET_USE_POLLWATCH
! 3474: dvp.dp_timeout = -1;
! 3475: #else
! 3476: if (pollstate == poll_idle)
! 3477: dvp.dp_timeout = -1;
! 3478: else
! 3479: dvp.dp_timeout = ISC_SOCKET_POLLWATCH_TIMEOUT;
! 3480: #endif /* ISC_SOCKET_USE_POLLWATCH */
! 3481: cc = ioctl(manager->devpoll_fd, DP_POLL, &dvp);
! 3482: #elif defined(USE_SELECT)
! 3483: LOCK(&manager->lock);
! 3484: memcpy(manager->read_fds_copy, manager->read_fds,
! 3485: manager->fd_bufsize);
! 3486: memcpy(manager->write_fds_copy, manager->write_fds,
! 3487: manager->fd_bufsize);
! 3488: maxfd = manager->maxfd + 1;
! 3489: UNLOCK(&manager->lock);
! 3490:
! 3491: cc = select(maxfd, manager->read_fds_copy,
! 3492: manager->write_fds_copy, NULL, NULL);
! 3493: #endif /* USE_KQUEUE */
! 3494:
! 3495: if (cc < 0 && !SOFT_ERROR(errno)) {
! 3496: isc__strerror(errno, strbuf, sizeof(strbuf));
! 3497: FATAL_ERROR(__FILE__, __LINE__,
! 3498: "%s %s: %s", fnname,
! 3499: isc_msgcat_get(isc_msgcat,
! 3500: ISC_MSGSET_GENERAL,
! 3501: ISC_MSG_FAILED,
! 3502: "failed"), strbuf);
! 3503: }
! 3504:
! 3505: #if defined(USE_DEVPOLL) && defined(ISC_SOCKET_USE_POLLWATCH)
! 3506: if (cc == 0) {
! 3507: if (pollstate == poll_active)
! 3508: pollstate = poll_checking;
! 3509: else if (pollstate == poll_checking)
! 3510: pollstate = poll_idle;
! 3511: } else if (cc > 0) {
! 3512: if (pollstate == poll_checking) {
! 3513: /*
! 3514: * XXX: We'd like to use a more
! 3515: * verbose log level as it's actually an
! 3516: * unexpected event, but the kernel bug
! 3517: * reportedly happens pretty frequently
! 3518: * (and it can also be a false positive)
! 3519: * so it would be just too noisy.
! 3520: */
! 3521: manager_log(manager,
! 3522: ISC_LOGCATEGORY_GENERAL,
! 3523: ISC_LOGMODULE_SOCKET,
! 3524: ISC_LOG_DEBUG(1),
! 3525: "unexpected POLL timeout");
! 3526: }
! 3527: pollstate = poll_active;
! 3528: }
! 3529: #endif
! 3530: } while (cc < 0);
! 3531:
! 3532: #if defined(USE_KQUEUE) || defined (USE_EPOLL) || defined (USE_DEVPOLL)
! 3533: done = process_fds(manager, manager->events, cc);
! 3534: #elif defined(USE_SELECT)
! 3535: process_fds(manager, maxfd, manager->read_fds_copy,
! 3536: manager->write_fds_copy);
! 3537:
! 3538: /*
! 3539: * Process reads on internal, control fd.
! 3540: */
! 3541: if (FD_ISSET(ctlfd, manager->read_fds_copy))
! 3542: done = process_ctlfd(manager);
! 3543: #endif
! 3544: }
! 3545:
! 3546: manager_log(manager, TRACE, "%s",
! 3547: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 3548: ISC_MSG_EXITING, "watcher exiting"));
! 3549:
! 3550: return ((isc_threadresult_t)0);
! 3551: }
! 3552: #endif /* ISC_PLATFORM_USETHREADS */
! 3553:
! 3554: void
! 3555: isc__socketmgr_setreserved(isc_socketmgr_t *manager, isc_uint32_t reserved) {
! 3556:
! 3557: REQUIRE(VALID_MANAGER(manager));
! 3558:
! 3559: manager->reserved = reserved;
! 3560: }
! 3561:
! 3562: /*
! 3563: * Create a new socket manager.
! 3564: */
! 3565:
! 3566: static isc_result_t
! 3567: setup_watcher(isc_mem_t *mctx, isc_socketmgr_t *manager) {
! 3568: isc_result_t result;
! 3569: #if defined(USE_KQUEUE) || defined(USE_EPOLL) || defined(USE_DEVPOLL)
! 3570: char strbuf[ISC_STRERRORSIZE];
! 3571: #endif
! 3572:
! 3573: #ifdef USE_KQUEUE
! 3574: manager->nevents = ISC_SOCKET_MAXEVENTS;
! 3575: manager->events = isc_mem_get(mctx, sizeof(struct kevent) *
! 3576: manager->nevents);
! 3577: if (manager->events == NULL)
! 3578: return (ISC_R_NOMEMORY);
! 3579: manager->kqueue_fd = kqueue();
! 3580: if (manager->kqueue_fd == -1) {
! 3581: result = isc__errno2result(errno);
! 3582: isc__strerror(errno, strbuf, sizeof(strbuf));
! 3583: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 3584: "kqueue %s: %s",
! 3585: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 3586: ISC_MSG_FAILED, "failed"),
! 3587: strbuf);
! 3588: isc_mem_put(mctx, manager->events,
! 3589: sizeof(struct kevent) * manager->nevents);
! 3590: return (result);
! 3591: }
! 3592:
! 3593: #ifdef ISC_PLATFORM_USETHREADS
! 3594: result = watch_fd(manager, manager->pipe_fds[0], SELECT_POKE_READ);
! 3595: if (result != ISC_R_SUCCESS) {
! 3596: close(manager->kqueue_fd);
! 3597: isc_mem_put(mctx, manager->events,
! 3598: sizeof(struct kevent) * manager->nevents);
! 3599: return (result);
! 3600: }
! 3601: #endif /* ISC_PLATFORM_USETHREADS */
! 3602: #elif defined(USE_EPOLL)
! 3603: manager->nevents = ISC_SOCKET_MAXEVENTS;
! 3604: manager->events = isc_mem_get(mctx, sizeof(struct epoll_event) *
! 3605: manager->nevents);
! 3606: if (manager->events == NULL)
! 3607: return (ISC_R_NOMEMORY);
! 3608: manager->epoll_fd = epoll_create(manager->nevents);
! 3609: if (manager->epoll_fd == -1) {
! 3610: result = isc__errno2result(errno);
! 3611: isc__strerror(errno, strbuf, sizeof(strbuf));
! 3612: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 3613: "epoll_create %s: %s",
! 3614: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 3615: ISC_MSG_FAILED, "failed"),
! 3616: strbuf);
! 3617: isc_mem_put(mctx, manager->events,
! 3618: sizeof(struct epoll_event) * manager->nevents);
! 3619: return (result);
! 3620: }
! 3621: #ifdef ISC_PLATFORM_USETHREADS
! 3622: result = watch_fd(manager, manager->pipe_fds[0], SELECT_POKE_READ);
! 3623: if (result != ISC_R_SUCCESS) {
! 3624: close(manager->epoll_fd);
! 3625: isc_mem_put(mctx, manager->events,
! 3626: sizeof(struct epoll_event) * manager->nevents);
! 3627: return (result);
! 3628: }
! 3629: #endif /* ISC_PLATFORM_USETHREADS */
! 3630: #elif defined(USE_DEVPOLL)
! 3631: /*
! 3632: * XXXJT: /dev/poll seems to reject large numbers of events,
! 3633: * so we should be careful about redefining ISC_SOCKET_MAXEVENTS.
! 3634: */
! 3635: manager->nevents = ISC_SOCKET_MAXEVENTS;
! 3636: manager->events = isc_mem_get(mctx, sizeof(struct pollfd) *
! 3637: manager->nevents);
! 3638: if (manager->events == NULL)
! 3639: return (ISC_R_NOMEMORY);
! 3640: /*
! 3641: * Note: fdpollinfo should be able to support all possible FDs, so
! 3642: * it must have maxsocks entries (not nevents).
! 3643: */
! 3644: manager->fdpollinfo = isc_mem_get(mctx, sizeof(pollinfo_t) *
! 3645: manager->maxsocks);
! 3646: if (manager->fdpollinfo == NULL) {
! 3647: isc_mem_put(mctx, manager->events,
! 3648: sizeof(pollinfo_t) * manager->maxsocks);
! 3649: return (ISC_R_NOMEMORY);
! 3650: }
! 3651: memset(manager->fdpollinfo, 0, sizeof(pollinfo_t) * manager->maxsocks);
! 3652: manager->devpoll_fd = open("/dev/poll", O_RDWR);
! 3653: if (manager->devpoll_fd == -1) {
! 3654: result = isc__errno2result(errno);
! 3655: isc__strerror(errno, strbuf, sizeof(strbuf));
! 3656: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 3657: "open(/dev/poll) %s: %s",
! 3658: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 3659: ISC_MSG_FAILED, "failed"),
! 3660: strbuf);
! 3661: isc_mem_put(mctx, manager->events,
! 3662: sizeof(struct pollfd) * manager->nevents);
! 3663: isc_mem_put(mctx, manager->fdpollinfo,
! 3664: sizeof(pollinfo_t) * manager->maxsocks);
! 3665: return (result);
! 3666: }
! 3667: #ifdef ISC_PLATFORM_USETHREADS
! 3668: result = watch_fd(manager, manager->pipe_fds[0], SELECT_POKE_READ);
! 3669: if (result != ISC_R_SUCCESS) {
! 3670: close(manager->devpoll_fd);
! 3671: isc_mem_put(mctx, manager->events,
! 3672: sizeof(struct pollfd) * manager->nevents);
! 3673: isc_mem_put(mctx, manager->fdpollinfo,
! 3674: sizeof(pollinfo_t) * manager->maxsocks);
! 3675: return (result);
! 3676: }
! 3677: #endif /* ISC_PLATFORM_USETHREADS */
! 3678: #elif defined(USE_SELECT)
! 3679: UNUSED(result);
! 3680:
! 3681: #if ISC_SOCKET_MAXSOCKETS > FD_SETSIZE
! 3682: /*
! 3683: * Note: this code should also cover the case of MAXSOCKETS <=
! 3684: * FD_SETSIZE, but we separate the cases to avoid possible portability
! 3685: * issues regarding howmany() and the actual representation of fd_set.
! 3686: */
! 3687: manager->fd_bufsize = howmany(manager->maxsocks, NFDBITS) *
! 3688: sizeof(fd_mask);
! 3689: #else
! 3690: manager->fd_bufsize = sizeof(fd_set);
! 3691: #endif
! 3692:
! 3693: manager->read_fds = NULL;
! 3694: manager->read_fds_copy = NULL;
! 3695: manager->write_fds = NULL;
! 3696: manager->write_fds_copy = NULL;
! 3697:
! 3698: manager->read_fds = isc_mem_get(mctx, manager->fd_bufsize);
! 3699: if (manager->read_fds != NULL)
! 3700: manager->read_fds_copy = isc_mem_get(mctx, manager->fd_bufsize);
! 3701: if (manager->read_fds_copy != NULL)
! 3702: manager->write_fds = isc_mem_get(mctx, manager->fd_bufsize);
! 3703: if (manager->write_fds != NULL) {
! 3704: manager->write_fds_copy = isc_mem_get(mctx,
! 3705: manager->fd_bufsize);
! 3706: }
! 3707: if (manager->write_fds_copy == NULL) {
! 3708: if (manager->write_fds != NULL) {
! 3709: isc_mem_put(mctx, manager->write_fds,
! 3710: manager->fd_bufsize);
! 3711: }
! 3712: if (manager->read_fds_copy != NULL) {
! 3713: isc_mem_put(mctx, manager->read_fds_copy,
! 3714: manager->fd_bufsize);
! 3715: }
! 3716: if (manager->read_fds != NULL) {
! 3717: isc_mem_put(mctx, manager->read_fds,
! 3718: manager->fd_bufsize);
! 3719: }
! 3720: return (ISC_R_NOMEMORY);
! 3721: }
! 3722: memset(manager->read_fds, 0, manager->fd_bufsize);
! 3723: memset(manager->write_fds, 0, manager->fd_bufsize);
! 3724:
! 3725: #ifdef ISC_PLATFORM_USETHREADS
! 3726: (void)watch_fd(manager, manager->pipe_fds[0], SELECT_POKE_READ);
! 3727: manager->maxfd = manager->pipe_fds[0];
! 3728: #else /* ISC_PLATFORM_USETHREADS */
! 3729: manager->maxfd = 0;
! 3730: #endif /* ISC_PLATFORM_USETHREADS */
! 3731: #endif /* USE_KQUEUE */
! 3732:
! 3733: return (ISC_R_SUCCESS);
! 3734: }
! 3735:
! 3736: static void
! 3737: cleanup_watcher(isc_mem_t *mctx, isc_socketmgr_t *manager) {
! 3738: #ifdef ISC_PLATFORM_USETHREADS
! 3739: isc_result_t result;
! 3740:
! 3741: result = unwatch_fd(manager, manager->pipe_fds[0], SELECT_POKE_READ);
! 3742: if (result != ISC_R_SUCCESS) {
! 3743: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 3744: "epoll_ctl(DEL) %s",
! 3745: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 3746: ISC_MSG_FAILED, "failed"));
! 3747: }
! 3748: #endif /* ISC_PLATFORM_USETHREADS */
! 3749:
! 3750: #ifdef USE_KQUEUE
! 3751: close(manager->kqueue_fd);
! 3752: isc_mem_put(mctx, manager->events,
! 3753: sizeof(struct kevent) * manager->nevents);
! 3754: #elif defined(USE_EPOLL)
! 3755: close(manager->epoll_fd);
! 3756: isc_mem_put(mctx, manager->events,
! 3757: sizeof(struct epoll_event) * manager->nevents);
! 3758: #elif defined(USE_DEVPOLL)
! 3759: close(manager->devpoll_fd);
! 3760: isc_mem_put(mctx, manager->events,
! 3761: sizeof(struct pollfd) * manager->nevents);
! 3762: isc_mem_put(mctx, manager->fdpollinfo,
! 3763: sizeof(pollinfo_t) * manager->maxsocks);
! 3764: #elif defined(USE_SELECT)
! 3765: if (manager->read_fds != NULL)
! 3766: isc_mem_put(mctx, manager->read_fds, manager->fd_bufsize);
! 3767: if (manager->read_fds_copy != NULL)
! 3768: isc_mem_put(mctx, manager->read_fds_copy, manager->fd_bufsize);
! 3769: if (manager->write_fds != NULL)
! 3770: isc_mem_put(mctx, manager->write_fds, manager->fd_bufsize);
! 3771: if (manager->write_fds_copy != NULL)
! 3772: isc_mem_put(mctx, manager->write_fds_copy, manager->fd_bufsize);
! 3773: #endif /* USE_KQUEUE */
! 3774: }
! 3775:
! 3776: isc_result_t
! 3777: isc_socketmgr_create(isc_mem_t *mctx, isc_socketmgr_t **managerp) {
! 3778: return (isc_socketmgr_create2(mctx, managerp, 0));
! 3779: }
! 3780:
! 3781: isc_result_t
! 3782: isc_socketmgr_create2(isc_mem_t *mctx, isc_socketmgr_t **managerp,
! 3783: unsigned int maxsocks)
! 3784: {
! 3785: int i;
! 3786: isc_socketmgr_t *manager;
! 3787: #ifdef ISC_PLATFORM_USETHREADS
! 3788: char strbuf[ISC_STRERRORSIZE];
! 3789: #endif
! 3790: isc_result_t result;
! 3791:
! 3792: REQUIRE(managerp != NULL && *managerp == NULL);
! 3793:
! 3794: #ifndef ISC_PLATFORM_USETHREADS
! 3795: if (socketmgr != NULL) {
! 3796: /* Don't allow maxsocks to be updated */
! 3797: if (maxsocks > 0 && socketmgr->maxsocks != maxsocks)
! 3798: return (ISC_R_EXISTS);
! 3799:
! 3800: socketmgr->refs++;
! 3801: *managerp = socketmgr;
! 3802: return (ISC_R_SUCCESS);
! 3803: }
! 3804: #endif /* ISC_PLATFORM_USETHREADS */
! 3805:
! 3806: if (maxsocks == 0)
! 3807: maxsocks = ISC_SOCKET_MAXSOCKETS;
! 3808:
! 3809: manager = isc_mem_get(mctx, sizeof(*manager));
! 3810: if (manager == NULL)
! 3811: return (ISC_R_NOMEMORY);
! 3812:
! 3813: /* zero-clear so that necessary cleanup on failure will be easy */
! 3814: memset(manager, 0, sizeof(*manager));
! 3815: manager->maxsocks = maxsocks;
! 3816: manager->reserved = 0;
! 3817: manager->fds = isc_mem_get(mctx,
! 3818: manager->maxsocks * sizeof(isc_socket_t *));
! 3819: if (manager->fds == NULL) {
! 3820: result = ISC_R_NOMEMORY;
! 3821: goto free_manager;
! 3822: }
! 3823: manager->fdstate = isc_mem_get(mctx, manager->maxsocks * sizeof(int));
! 3824: if (manager->fdstate == NULL) {
! 3825: result = ISC_R_NOMEMORY;
! 3826: goto free_manager;
! 3827: }
! 3828: manager->stats = NULL;
! 3829:
! 3830: manager->magic = SOCKET_MANAGER_MAGIC;
! 3831: manager->mctx = NULL;
! 3832: memset(manager->fds, 0, manager->maxsocks * sizeof(isc_socket_t *));
! 3833: ISC_LIST_INIT(manager->socklist);
! 3834: result = isc_mutex_init(&manager->lock);
! 3835: if (result != ISC_R_SUCCESS)
! 3836: goto free_manager;
! 3837: manager->fdlock = isc_mem_get(mctx, FDLOCK_COUNT * sizeof(isc_mutex_t));
! 3838: if (manager->fdlock == NULL) {
! 3839: result = ISC_R_NOMEMORY;
! 3840: goto cleanup_lock;
! 3841: }
! 3842: for (i = 0; i < FDLOCK_COUNT; i++) {
! 3843: result = isc_mutex_init(&manager->fdlock[i]);
! 3844: if (result != ISC_R_SUCCESS) {
! 3845: while (--i >= 0)
! 3846: DESTROYLOCK(&manager->fdlock[i]);
! 3847: isc_mem_put(mctx, manager->fdlock,
! 3848: FDLOCK_COUNT * sizeof(isc_mutex_t));
! 3849: manager->fdlock = NULL;
! 3850: goto cleanup_lock;
! 3851: }
! 3852: }
! 3853:
! 3854: #ifdef ISC_PLATFORM_USETHREADS
! 3855: if (isc_condition_init(&manager->shutdown_ok) != ISC_R_SUCCESS) {
! 3856: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 3857: "isc_condition_init() %s",
! 3858: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 3859: ISC_MSG_FAILED, "failed"));
! 3860: result = ISC_R_UNEXPECTED;
! 3861: goto cleanup_lock;
! 3862: }
! 3863:
! 3864: /*
! 3865: * Create the special fds that will be used to wake up the
! 3866: * select/poll loop when something internal needs to be done.
! 3867: */
! 3868: if (pipe(manager->pipe_fds) != 0) {
! 3869: isc__strerror(errno, strbuf, sizeof(strbuf));
! 3870: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 3871: "pipe() %s: %s",
! 3872: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 3873: ISC_MSG_FAILED, "failed"),
! 3874: strbuf);
! 3875: result = ISC_R_UNEXPECTED;
! 3876: goto cleanup_condition;
! 3877: }
! 3878:
! 3879: RUNTIME_CHECK(make_nonblock(manager->pipe_fds[0]) == ISC_R_SUCCESS);
! 3880: #if 0
! 3881: RUNTIME_CHECK(make_nonblock(manager->pipe_fds[1]) == ISC_R_SUCCESS);
! 3882: #endif
! 3883: #else /* ISC_PLATFORM_USETHREADS */
! 3884: manager->refs = 1;
! 3885: #endif /* ISC_PLATFORM_USETHREADS */
! 3886:
! 3887: /*
! 3888: * Set up initial state for the select loop
! 3889: */
! 3890: result = setup_watcher(mctx, manager);
! 3891: if (result != ISC_R_SUCCESS)
! 3892: goto cleanup;
! 3893: memset(manager->fdstate, 0, manager->maxsocks * sizeof(int));
! 3894: #ifdef ISC_PLATFORM_USETHREADS
! 3895: /*
! 3896: * Start up the select/poll thread.
! 3897: */
! 3898: if (isc_thread_create(watcher, manager, &manager->watcher) !=
! 3899: ISC_R_SUCCESS) {
! 3900: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 3901: "isc_thread_create() %s",
! 3902: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 3903: ISC_MSG_FAILED, "failed"));
! 3904: cleanup_watcher(mctx, manager);
! 3905: result = ISC_R_UNEXPECTED;
! 3906: goto cleanup;
! 3907: }
! 3908: #endif /* ISC_PLATFORM_USETHREADS */
! 3909: isc_mem_attach(mctx, &manager->mctx);
! 3910:
! 3911: #ifndef ISC_PLATFORM_USETHREADS
! 3912: socketmgr = manager;
! 3913: #endif /* ISC_PLATFORM_USETHREADS */
! 3914: *managerp = manager;
! 3915:
! 3916: return (ISC_R_SUCCESS);
! 3917:
! 3918: cleanup:
! 3919: #ifdef ISC_PLATFORM_USETHREADS
! 3920: (void)close(manager->pipe_fds[0]);
! 3921: (void)close(manager->pipe_fds[1]);
! 3922: #endif /* ISC_PLATFORM_USETHREADS */
! 3923:
! 3924: #ifdef ISC_PLATFORM_USETHREADS
! 3925: cleanup_condition:
! 3926: (void)isc_condition_destroy(&manager->shutdown_ok);
! 3927: #endif /* ISC_PLATFORM_USETHREADS */
! 3928:
! 3929:
! 3930: cleanup_lock:
! 3931: if (manager->fdlock != NULL) {
! 3932: for (i = 0; i < FDLOCK_COUNT; i++)
! 3933: DESTROYLOCK(&manager->fdlock[i]);
! 3934: }
! 3935: DESTROYLOCK(&manager->lock);
! 3936:
! 3937: free_manager:
! 3938: if (manager->fdlock != NULL) {
! 3939: isc_mem_put(mctx, manager->fdlock,
! 3940: FDLOCK_COUNT * sizeof(isc_mutex_t));
! 3941: }
! 3942: if (manager->fdstate != NULL) {
! 3943: isc_mem_put(mctx, manager->fdstate,
! 3944: manager->maxsocks * sizeof(int));
! 3945: }
! 3946: if (manager->fds != NULL) {
! 3947: isc_mem_put(mctx, manager->fds,
! 3948: manager->maxsocks * sizeof(isc_socket_t *));
! 3949: }
! 3950: isc_mem_put(mctx, manager, sizeof(*manager));
! 3951:
! 3952: return (result);
! 3953: }
! 3954:
! 3955: isc_result_t
! 3956: isc_socketmgr_getmaxsockets(isc_socketmgr_t *manager, unsigned int *nsockp) {
! 3957: REQUIRE(VALID_MANAGER(manager));
! 3958: REQUIRE(nsockp != NULL);
! 3959:
! 3960: *nsockp = manager->maxsocks;
! 3961:
! 3962: return (ISC_R_SUCCESS);
! 3963: }
! 3964:
! 3965: void
! 3966: isc_socketmgr_setstats(isc_socketmgr_t *manager, isc_stats_t *stats) {
! 3967: REQUIRE(VALID_MANAGER(manager));
! 3968: REQUIRE(ISC_LIST_EMPTY(manager->socklist));
! 3969: REQUIRE(manager->stats == NULL);
! 3970: REQUIRE(isc_stats_ncounters(stats) == isc_sockstatscounter_max);
! 3971:
! 3972: isc_stats_attach(stats, &manager->stats);
! 3973: }
! 3974:
! 3975: void
! 3976: isc_socketmgr_destroy(isc_socketmgr_t **managerp) {
! 3977: isc_socketmgr_t *manager;
! 3978: int i;
! 3979: isc_mem_t *mctx;
! 3980:
! 3981: /*
! 3982: * Destroy a socket manager.
! 3983: */
! 3984:
! 3985: REQUIRE(managerp != NULL);
! 3986: manager = *managerp;
! 3987: REQUIRE(VALID_MANAGER(manager));
! 3988:
! 3989: #ifndef ISC_PLATFORM_USETHREADS
! 3990: if (manager->refs > 1) {
! 3991: manager->refs--;
! 3992: *managerp = NULL;
! 3993: return;
! 3994: }
! 3995: #endif /* ISC_PLATFORM_USETHREADS */
! 3996:
! 3997: LOCK(&manager->lock);
! 3998:
! 3999: #ifdef ISC_PLATFORM_USETHREADS
! 4000: /*
! 4001: * Wait for all sockets to be destroyed.
! 4002: */
! 4003: while (!ISC_LIST_EMPTY(manager->socklist)) {
! 4004: manager_log(manager, CREATION, "%s",
! 4005: isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKET,
! 4006: ISC_MSG_SOCKETSREMAIN,
! 4007: "sockets exist"));
! 4008: WAIT(&manager->shutdown_ok, &manager->lock);
! 4009: }
! 4010: #else /* ISC_PLATFORM_USETHREADS */
! 4011: /*
! 4012: * Hope all sockets have been destroyed.
! 4013: */
! 4014: if (!ISC_LIST_EMPTY(manager->socklist)) {
! 4015: manager_log(manager, CREATION, "%s",
! 4016: isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKET,
! 4017: ISC_MSG_SOCKETSREMAIN,
! 4018: "sockets exist"));
! 4019: INSIST(0);
! 4020: }
! 4021: #endif /* ISC_PLATFORM_USETHREADS */
! 4022:
! 4023: UNLOCK(&manager->lock);
! 4024:
! 4025: /*
! 4026: * Here, poke our select/poll thread. Do this by closing the write
! 4027: * half of the pipe, which will send EOF to the read half.
! 4028: * This is currently a no-op in the non-threaded case.
! 4029: */
! 4030: select_poke(manager, 0, SELECT_POKE_SHUTDOWN);
! 4031:
! 4032: #ifdef ISC_PLATFORM_USETHREADS
! 4033: /*
! 4034: * Wait for thread to exit.
! 4035: */
! 4036: if (isc_thread_join(manager->watcher, NULL) != ISC_R_SUCCESS)
! 4037: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 4038: "isc_thread_join() %s",
! 4039: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 4040: ISC_MSG_FAILED, "failed"));
! 4041: #endif /* ISC_PLATFORM_USETHREADS */
! 4042:
! 4043: /*
! 4044: * Clean up.
! 4045: */
! 4046: cleanup_watcher(manager->mctx, manager);
! 4047:
! 4048: #ifdef ISC_PLATFORM_USETHREADS
! 4049: (void)close(manager->pipe_fds[0]);
! 4050: (void)close(manager->pipe_fds[1]);
! 4051: (void)isc_condition_destroy(&manager->shutdown_ok);
! 4052: #endif /* ISC_PLATFORM_USETHREADS */
! 4053:
! 4054: for (i = 0; i < (int)manager->maxsocks; i++)
! 4055: if (manager->fdstate[i] == CLOSE_PENDING) /* no need to lock */
! 4056: (void)close(i);
! 4057:
! 4058: isc_mem_put(manager->mctx, manager->fds,
! 4059: manager->maxsocks * sizeof(isc_socket_t *));
! 4060: isc_mem_put(manager->mctx, manager->fdstate,
! 4061: manager->maxsocks * sizeof(int));
! 4062:
! 4063: if (manager->stats != NULL)
! 4064: isc_stats_detach(&manager->stats);
! 4065:
! 4066: if (manager->fdlock != NULL) {
! 4067: for (i = 0; i < FDLOCK_COUNT; i++)
! 4068: DESTROYLOCK(&manager->fdlock[i]);
! 4069: isc_mem_put(manager->mctx, manager->fdlock,
! 4070: FDLOCK_COUNT * sizeof(isc_mutex_t));
! 4071: }
! 4072: DESTROYLOCK(&manager->lock);
! 4073: manager->magic = 0;
! 4074: mctx= manager->mctx;
! 4075: isc_mem_put(mctx, manager, sizeof(*manager));
! 4076:
! 4077: isc_mem_detach(&mctx);
! 4078:
! 4079: *managerp = NULL;
! 4080: }
! 4081:
! 4082: static isc_result_t
! 4083: socket_recv(isc_socket_t *sock, isc_socketevent_t *dev, isc_task_t *task,
! 4084: unsigned int flags)
! 4085: {
! 4086: int io_state;
! 4087: isc_boolean_t have_lock = ISC_FALSE;
! 4088: isc_task_t *ntask = NULL;
! 4089: isc_result_t result = ISC_R_SUCCESS;
! 4090:
! 4091: dev->ev_sender = task;
! 4092:
! 4093: if (sock->type == isc_sockettype_udp) {
! 4094: io_state = doio_recv(sock, dev);
! 4095: } else {
! 4096: LOCK(&sock->lock);
! 4097: have_lock = ISC_TRUE;
! 4098:
! 4099: if (ISC_LIST_EMPTY(sock->recv_list))
! 4100: io_state = doio_recv(sock, dev);
! 4101: else
! 4102: io_state = DOIO_SOFT;
! 4103: }
! 4104:
! 4105: switch (io_state) {
! 4106: case DOIO_SOFT:
! 4107: /*
! 4108: * We couldn't read all or part of the request right now, so
! 4109: * queue it.
! 4110: *
! 4111: * Attach to socket and to task
! 4112: */
! 4113: isc_task_attach(task, &ntask);
! 4114: dev->attributes |= ISC_SOCKEVENTATTR_ATTACHED;
! 4115:
! 4116: if (!have_lock) {
! 4117: LOCK(&sock->lock);
! 4118: have_lock = ISC_TRUE;
! 4119: }
! 4120:
! 4121: /*
! 4122: * Enqueue the request. If the socket was previously not being
! 4123: * watched, poke the watcher to start paying attention to it.
! 4124: */
! 4125: if (ISC_LIST_EMPTY(sock->recv_list) && !sock->pending_recv)
! 4126: select_poke(sock->manager, sock->fd, SELECT_POKE_READ);
! 4127: ISC_LIST_ENQUEUE(sock->recv_list, dev, ev_link);
! 4128:
! 4129: socket_log(sock, NULL, EVENT, NULL, 0, 0,
! 4130: "socket_recv: event %p -> task %p",
! 4131: dev, ntask);
! 4132:
! 4133: if ((flags & ISC_SOCKFLAG_IMMEDIATE) != 0)
! 4134: result = ISC_R_INPROGRESS;
! 4135: break;
! 4136:
! 4137: case DOIO_EOF:
! 4138: dev->result = ISC_R_EOF;
! 4139: /* fallthrough */
! 4140:
! 4141: case DOIO_HARD:
! 4142: case DOIO_SUCCESS:
! 4143: if ((flags & ISC_SOCKFLAG_IMMEDIATE) == 0)
! 4144: send_recvdone_event(sock, &dev);
! 4145: break;
! 4146: }
! 4147:
! 4148: if (have_lock)
! 4149: UNLOCK(&sock->lock);
! 4150:
! 4151: return (result);
! 4152: }
! 4153:
! 4154: isc_result_t
! 4155: isc_socket_recvv(isc_socket_t *sock, isc_bufferlist_t *buflist,
! 4156: unsigned int minimum, isc_task_t *task,
! 4157: isc_taskaction_t action, const void *arg)
! 4158: {
! 4159: isc_socketevent_t *dev;
! 4160: isc_socketmgr_t *manager;
! 4161: unsigned int iocount;
! 4162: isc_buffer_t *buffer;
! 4163:
! 4164: REQUIRE(VALID_SOCKET(sock));
! 4165: REQUIRE(buflist != NULL);
! 4166: REQUIRE(!ISC_LIST_EMPTY(*buflist));
! 4167: REQUIRE(task != NULL);
! 4168: REQUIRE(action != NULL);
! 4169:
! 4170: manager = sock->manager;
! 4171: REQUIRE(VALID_MANAGER(manager));
! 4172:
! 4173: iocount = isc_bufferlist_availablecount(buflist);
! 4174: REQUIRE(iocount > 0);
! 4175:
! 4176: INSIST(sock->bound);
! 4177:
! 4178: dev = allocate_socketevent(sock, ISC_SOCKEVENT_RECVDONE, action, arg);
! 4179: if (dev == NULL) {
! 4180: return (ISC_R_NOMEMORY);
! 4181: }
! 4182:
! 4183: /*
! 4184: * UDP sockets are always partial read
! 4185: */
! 4186: if (sock->type == isc_sockettype_udp)
! 4187: dev->minimum = 1;
! 4188: else {
! 4189: if (minimum == 0)
! 4190: dev->minimum = iocount;
! 4191: else
! 4192: dev->minimum = minimum;
! 4193: }
! 4194:
! 4195: /*
! 4196: * Move each buffer from the passed in list to our internal one.
! 4197: */
! 4198: buffer = ISC_LIST_HEAD(*buflist);
! 4199: while (buffer != NULL) {
! 4200: ISC_LIST_DEQUEUE(*buflist, buffer, link);
! 4201: ISC_LIST_ENQUEUE(dev->bufferlist, buffer, link);
! 4202: buffer = ISC_LIST_HEAD(*buflist);
! 4203: }
! 4204:
! 4205: return (socket_recv(sock, dev, task, 0));
! 4206: }
! 4207:
! 4208: isc_result_t
! 4209: isc_socket_recv(isc_socket_t *sock, isc_region_t *region, unsigned int minimum,
! 4210: isc_task_t *task, isc_taskaction_t action, const void *arg)
! 4211: {
! 4212: isc_socketevent_t *dev;
! 4213: isc_socketmgr_t *manager;
! 4214:
! 4215: REQUIRE(VALID_SOCKET(sock));
! 4216: REQUIRE(action != NULL);
! 4217:
! 4218: manager = sock->manager;
! 4219: REQUIRE(VALID_MANAGER(manager));
! 4220:
! 4221: INSIST(sock->bound);
! 4222:
! 4223: dev = allocate_socketevent(sock, ISC_SOCKEVENT_RECVDONE, action, arg);
! 4224: if (dev == NULL)
! 4225: return (ISC_R_NOMEMORY);
! 4226:
! 4227: return (isc_socket_recv2(sock, region, minimum, task, dev, 0));
! 4228: }
! 4229:
! 4230: isc_result_t
! 4231: isc_socket_recv2(isc_socket_t *sock, isc_region_t *region,
! 4232: unsigned int minimum, isc_task_t *task,
! 4233: isc_socketevent_t *event, unsigned int flags)
! 4234: {
! 4235: event->ev_sender = sock;
! 4236: event->result = ISC_R_UNEXPECTED;
! 4237: ISC_LIST_INIT(event->bufferlist);
! 4238: event->region = *region;
! 4239: event->n = 0;
! 4240: event->offset = 0;
! 4241: event->attributes = 0;
! 4242:
! 4243: /*
! 4244: * UDP sockets are always partial read.
! 4245: */
! 4246: if (sock->type == isc_sockettype_udp)
! 4247: event->minimum = 1;
! 4248: else {
! 4249: if (minimum == 0)
! 4250: event->minimum = region->length;
! 4251: else
! 4252: event->minimum = minimum;
! 4253: }
! 4254:
! 4255: return (socket_recv(sock, event, task, flags));
! 4256: }
! 4257:
! 4258: static isc_result_t
! 4259: socket_send(isc_socket_t *sock, isc_socketevent_t *dev, isc_task_t *task,
! 4260: isc_sockaddr_t *address, struct in6_pktinfo *pktinfo,
! 4261: unsigned int flags)
! 4262: {
! 4263: int io_state;
! 4264: isc_boolean_t have_lock = ISC_FALSE;
! 4265: isc_task_t *ntask = NULL;
! 4266: isc_result_t result = ISC_R_SUCCESS;
! 4267:
! 4268: dev->ev_sender = task;
! 4269:
! 4270: set_dev_address(address, sock, dev);
! 4271: if (pktinfo != NULL) {
! 4272: dev->attributes |= ISC_SOCKEVENTATTR_PKTINFO;
! 4273: dev->pktinfo = *pktinfo;
! 4274:
! 4275: if (!isc_sockaddr_issitelocal(&dev->address) &&
! 4276: !isc_sockaddr_islinklocal(&dev->address)) {
! 4277: socket_log(sock, NULL, TRACE, isc_msgcat,
! 4278: ISC_MSGSET_SOCKET, ISC_MSG_PKTINFOPROVIDED,
! 4279: "pktinfo structure provided, ifindex %u "
! 4280: "(set to 0)", pktinfo->ipi6_ifindex);
! 4281:
! 4282: /*
! 4283: * Set the pktinfo index to 0 here, to let the
! 4284: * kernel decide what interface it should send on.
! 4285: */
! 4286: dev->pktinfo.ipi6_ifindex = 0;
! 4287: }
! 4288: }
! 4289:
! 4290: if (sock->type == isc_sockettype_udp)
! 4291: io_state = doio_send(sock, dev);
! 4292: else {
! 4293: LOCK(&sock->lock);
! 4294: have_lock = ISC_TRUE;
! 4295:
! 4296: if (ISC_LIST_EMPTY(sock->send_list))
! 4297: io_state = doio_send(sock, dev);
! 4298: else
! 4299: io_state = DOIO_SOFT;
! 4300: }
! 4301:
! 4302: switch (io_state) {
! 4303: case DOIO_SOFT:
! 4304: /*
! 4305: * We couldn't send all or part of the request right now, so
! 4306: * queue it unless ISC_SOCKFLAG_NORETRY is set.
! 4307: */
! 4308: if ((flags & ISC_SOCKFLAG_NORETRY) == 0) {
! 4309: isc_task_attach(task, &ntask);
! 4310: dev->attributes |= ISC_SOCKEVENTATTR_ATTACHED;
! 4311:
! 4312: if (!have_lock) {
! 4313: LOCK(&sock->lock);
! 4314: have_lock = ISC_TRUE;
! 4315: }
! 4316:
! 4317: /*
! 4318: * Enqueue the request. If the socket was previously
! 4319: * not being watched, poke the watcher to start
! 4320: * paying attention to it.
! 4321: */
! 4322: if (ISC_LIST_EMPTY(sock->send_list) &&
! 4323: !sock->pending_send)
! 4324: select_poke(sock->manager, sock->fd,
! 4325: SELECT_POKE_WRITE);
! 4326: ISC_LIST_ENQUEUE(sock->send_list, dev, ev_link);
! 4327:
! 4328: socket_log(sock, NULL, EVENT, NULL, 0, 0,
! 4329: "socket_send: event %p -> task %p",
! 4330: dev, ntask);
! 4331:
! 4332: if ((flags & ISC_SOCKFLAG_IMMEDIATE) != 0)
! 4333: result = ISC_R_INPROGRESS;
! 4334: break;
! 4335: }
! 4336:
! 4337: case DOIO_HARD:
! 4338: case DOIO_SUCCESS:
! 4339: if ((flags & ISC_SOCKFLAG_IMMEDIATE) == 0)
! 4340: send_senddone_event(sock, &dev);
! 4341: break;
! 4342: }
! 4343:
! 4344: if (have_lock)
! 4345: UNLOCK(&sock->lock);
! 4346:
! 4347: return (result);
! 4348: }
! 4349:
! 4350: isc_result_t
! 4351: isc_socket_send(isc_socket_t *sock, isc_region_t *region,
! 4352: isc_task_t *task, isc_taskaction_t action, const void *arg)
! 4353: {
! 4354: /*
! 4355: * REQUIRE() checking is performed in isc_socket_sendto().
! 4356: */
! 4357: return (isc_socket_sendto(sock, region, task, action, arg, NULL,
! 4358: NULL));
! 4359: }
! 4360:
! 4361: isc_result_t
! 4362: isc_socket_sendto(isc_socket_t *sock, isc_region_t *region,
! 4363: isc_task_t *task, isc_taskaction_t action, const void *arg,
! 4364: isc_sockaddr_t *address, struct in6_pktinfo *pktinfo)
! 4365: {
! 4366: isc_socketevent_t *dev;
! 4367: isc_socketmgr_t *manager;
! 4368:
! 4369: REQUIRE(VALID_SOCKET(sock));
! 4370: REQUIRE(region != NULL);
! 4371: REQUIRE(task != NULL);
! 4372: REQUIRE(action != NULL);
! 4373:
! 4374: manager = sock->manager;
! 4375: REQUIRE(VALID_MANAGER(manager));
! 4376:
! 4377: INSIST(sock->bound);
! 4378:
! 4379: dev = allocate_socketevent(sock, ISC_SOCKEVENT_SENDDONE, action, arg);
! 4380: if (dev == NULL) {
! 4381: return (ISC_R_NOMEMORY);
! 4382: }
! 4383:
! 4384: dev->region = *region;
! 4385:
! 4386: return (socket_send(sock, dev, task, address, pktinfo, 0));
! 4387: }
! 4388:
! 4389: isc_result_t
! 4390: isc_socket_sendv(isc_socket_t *sock, isc_bufferlist_t *buflist,
! 4391: isc_task_t *task, isc_taskaction_t action, const void *arg)
! 4392: {
! 4393: return (isc_socket_sendtov(sock, buflist, task, action, arg, NULL,
! 4394: NULL));
! 4395: }
! 4396:
! 4397: isc_result_t
! 4398: isc_socket_sendtov(isc_socket_t *sock, isc_bufferlist_t *buflist,
! 4399: isc_task_t *task, isc_taskaction_t action, const void *arg,
! 4400: isc_sockaddr_t *address, struct in6_pktinfo *pktinfo)
! 4401: {
! 4402: isc_socketevent_t *dev;
! 4403: isc_socketmgr_t *manager;
! 4404: unsigned int iocount;
! 4405: isc_buffer_t *buffer;
! 4406:
! 4407: REQUIRE(VALID_SOCKET(sock));
! 4408: REQUIRE(buflist != NULL);
! 4409: REQUIRE(!ISC_LIST_EMPTY(*buflist));
! 4410: REQUIRE(task != NULL);
! 4411: REQUIRE(action != NULL);
! 4412:
! 4413: manager = sock->manager;
! 4414: REQUIRE(VALID_MANAGER(manager));
! 4415:
! 4416: iocount = isc_bufferlist_usedcount(buflist);
! 4417: REQUIRE(iocount > 0);
! 4418:
! 4419: dev = allocate_socketevent(sock, ISC_SOCKEVENT_SENDDONE, action, arg);
! 4420: if (dev == NULL) {
! 4421: return (ISC_R_NOMEMORY);
! 4422: }
! 4423:
! 4424: /*
! 4425: * Move each buffer from the passed in list to our internal one.
! 4426: */
! 4427: buffer = ISC_LIST_HEAD(*buflist);
! 4428: while (buffer != NULL) {
! 4429: ISC_LIST_DEQUEUE(*buflist, buffer, link);
! 4430: ISC_LIST_ENQUEUE(dev->bufferlist, buffer, link);
! 4431: buffer = ISC_LIST_HEAD(*buflist);
! 4432: }
! 4433:
! 4434: return (socket_send(sock, dev, task, address, pktinfo, 0));
! 4435: }
! 4436:
! 4437: isc_result_t
! 4438: isc_socket_sendto2(isc_socket_t *sock, isc_region_t *region,
! 4439: isc_task_t *task,
! 4440: isc_sockaddr_t *address, struct in6_pktinfo *pktinfo,
! 4441: isc_socketevent_t *event, unsigned int flags)
! 4442: {
! 4443: REQUIRE((flags & ~(ISC_SOCKFLAG_IMMEDIATE|ISC_SOCKFLAG_NORETRY)) == 0);
! 4444: if ((flags & ISC_SOCKFLAG_NORETRY) != 0)
! 4445: REQUIRE(sock->type == isc_sockettype_udp);
! 4446: event->ev_sender = sock;
! 4447: event->result = ISC_R_UNEXPECTED;
! 4448: ISC_LIST_INIT(event->bufferlist);
! 4449: event->region = *region;
! 4450: event->n = 0;
! 4451: event->offset = 0;
! 4452: event->attributes = 0;
! 4453:
! 4454: return (socket_send(sock, event, task, address, pktinfo, flags));
! 4455: }
! 4456:
! 4457: void
! 4458: isc_socket_cleanunix(isc_sockaddr_t *sockaddr, isc_boolean_t active) {
! 4459: #ifdef ISC_PLATFORM_HAVESYSUNH
! 4460: int s;
! 4461: struct stat sb;
! 4462: char strbuf[ISC_STRERRORSIZE];
! 4463:
! 4464: if (sockaddr->type.sa.sa_family != AF_UNIX)
! 4465: return;
! 4466:
! 4467: #ifndef S_ISSOCK
! 4468: #if defined(S_IFMT) && defined(S_IFSOCK)
! 4469: #define S_ISSOCK(mode) ((mode & S_IFMT)==S_IFSOCK)
! 4470: #elif defined(_S_IFMT) && defined(S_IFSOCK)
! 4471: #define S_ISSOCK(mode) ((mode & _S_IFMT)==S_IFSOCK)
! 4472: #endif
! 4473: #endif
! 4474:
! 4475: #ifndef S_ISFIFO
! 4476: #if defined(S_IFMT) && defined(S_IFIFO)
! 4477: #define S_ISFIFO(mode) ((mode & S_IFMT)==S_IFIFO)
! 4478: #elif defined(_S_IFMT) && defined(S_IFIFO)
! 4479: #define S_ISFIFO(mode) ((mode & _S_IFMT)==S_IFIFO)
! 4480: #endif
! 4481: #endif
! 4482:
! 4483: #if !defined(S_ISFIFO) && !defined(S_ISSOCK)
! 4484: #error You need to define S_ISFIFO and S_ISSOCK as appropriate for your platform. See <sys/stat.h>.
! 4485: #endif
! 4486:
! 4487: #ifndef S_ISFIFO
! 4488: #define S_ISFIFO(mode) 0
! 4489: #endif
! 4490:
! 4491: #ifndef S_ISSOCK
! 4492: #define S_ISSOCK(mode) 0
! 4493: #endif
! 4494:
! 4495: if (active) {
! 4496: if (stat(sockaddr->type.sunix.sun_path, &sb) < 0) {
! 4497: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4498: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 4499: ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
! 4500: "isc_socket_cleanunix: stat(%s): %s",
! 4501: sockaddr->type.sunix.sun_path, strbuf);
! 4502: return;
! 4503: }
! 4504: if (!(S_ISSOCK(sb.st_mode) || S_ISFIFO(sb.st_mode))) {
! 4505: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 4506: ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
! 4507: "isc_socket_cleanunix: %s: not a socket",
! 4508: sockaddr->type.sunix.sun_path);
! 4509: return;
! 4510: }
! 4511: if (unlink(sockaddr->type.sunix.sun_path) < 0) {
! 4512: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4513: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 4514: ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
! 4515: "isc_socket_cleanunix: unlink(%s): %s",
! 4516: sockaddr->type.sunix.sun_path, strbuf);
! 4517: }
! 4518: return;
! 4519: }
! 4520:
! 4521: s = socket(AF_UNIX, SOCK_STREAM, 0);
! 4522: if (s < 0) {
! 4523: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4524: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 4525: ISC_LOGMODULE_SOCKET, ISC_LOG_WARNING,
! 4526: "isc_socket_cleanunix: socket(%s): %s",
! 4527: sockaddr->type.sunix.sun_path, strbuf);
! 4528: return;
! 4529: }
! 4530:
! 4531: if (stat(sockaddr->type.sunix.sun_path, &sb) < 0) {
! 4532: switch (errno) {
! 4533: case ENOENT: /* We exited cleanly last time */
! 4534: break;
! 4535: default:
! 4536: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4537: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 4538: ISC_LOGMODULE_SOCKET, ISC_LOG_WARNING,
! 4539: "isc_socket_cleanunix: stat(%s): %s",
! 4540: sockaddr->type.sunix.sun_path, strbuf);
! 4541: break;
! 4542: }
! 4543: goto cleanup;
! 4544: }
! 4545:
! 4546: if (!(S_ISSOCK(sb.st_mode) || S_ISFIFO(sb.st_mode))) {
! 4547: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 4548: ISC_LOGMODULE_SOCKET, ISC_LOG_WARNING,
! 4549: "isc_socket_cleanunix: %s: not a socket",
! 4550: sockaddr->type.sunix.sun_path);
! 4551: goto cleanup;
! 4552: }
! 4553:
! 4554: if (connect(s, (struct sockaddr *)&sockaddr->type.sunix,
! 4555: sizeof(sockaddr->type.sunix)) < 0) {
! 4556: switch (errno) {
! 4557: case ECONNREFUSED:
! 4558: case ECONNRESET:
! 4559: if (unlink(sockaddr->type.sunix.sun_path) < 0) {
! 4560: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4561: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 4562: ISC_LOGMODULE_SOCKET,
! 4563: ISC_LOG_WARNING,
! 4564: "isc_socket_cleanunix: "
! 4565: "unlink(%s): %s",
! 4566: sockaddr->type.sunix.sun_path,
! 4567: strbuf);
! 4568: }
! 4569: break;
! 4570: default:
! 4571: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4572: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 4573: ISC_LOGMODULE_SOCKET, ISC_LOG_WARNING,
! 4574: "isc_socket_cleanunix: connect(%s): %s",
! 4575: sockaddr->type.sunix.sun_path, strbuf);
! 4576: break;
! 4577: }
! 4578: }
! 4579: cleanup:
! 4580: close(s);
! 4581: #else
! 4582: UNUSED(sockaddr);
! 4583: UNUSED(active);
! 4584: #endif
! 4585: }
! 4586:
! 4587: isc_result_t
! 4588: isc_socket_permunix(isc_sockaddr_t *sockaddr, isc_uint32_t perm,
! 4589: isc_uint32_t owner, isc_uint32_t group)
! 4590: {
! 4591: #ifdef ISC_PLATFORM_HAVESYSUNH
! 4592: isc_result_t result = ISC_R_SUCCESS;
! 4593: char strbuf[ISC_STRERRORSIZE];
! 4594: char path[sizeof(sockaddr->type.sunix.sun_path)];
! 4595: #ifdef NEED_SECURE_DIRECTORY
! 4596: char *slash;
! 4597: #endif
! 4598:
! 4599: REQUIRE(sockaddr->type.sa.sa_family == AF_UNIX);
! 4600: INSIST(strlen(sockaddr->type.sunix.sun_path) < sizeof(path));
! 4601: strcpy(path, sockaddr->type.sunix.sun_path);
! 4602:
! 4603: #ifdef NEED_SECURE_DIRECTORY
! 4604: slash = strrchr(path, '/');
! 4605: if (slash != NULL) {
! 4606: if (slash != path)
! 4607: *slash = '\0';
! 4608: else
! 4609: strcpy(path, "/");
! 4610: } else
! 4611: strcpy(path, ".");
! 4612: #endif
! 4613:
! 4614: if (chmod(path, perm) < 0) {
! 4615: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4616: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 4617: ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
! 4618: "isc_socket_permunix: chmod(%s, %d): %s",
! 4619: path, perm, strbuf);
! 4620: result = ISC_R_FAILURE;
! 4621: }
! 4622: if (chown(path, owner, group) < 0) {
! 4623: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4624: isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
! 4625: ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
! 4626: "isc_socket_permunix: chown(%s, %d, %d): %s",
! 4627: path, owner, group,
! 4628: strbuf);
! 4629: result = ISC_R_FAILURE;
! 4630: }
! 4631: return (result);
! 4632: #else
! 4633: UNUSED(sockaddr);
! 4634: UNUSED(perm);
! 4635: UNUSED(owner);
! 4636: UNUSED(group);
! 4637: return (ISC_R_NOTIMPLEMENTED);
! 4638: #endif
! 4639: }
! 4640:
! 4641: isc_result_t
! 4642: isc_socket_bind(isc_socket_t *sock, isc_sockaddr_t *sockaddr,
! 4643: unsigned int options) {
! 4644: char strbuf[ISC_STRERRORSIZE];
! 4645: int on = 1;
! 4646:
! 4647: LOCK(&sock->lock);
! 4648:
! 4649: INSIST(!sock->bound);
! 4650:
! 4651: if (sock->pf != sockaddr->type.sa.sa_family) {
! 4652: UNLOCK(&sock->lock);
! 4653: return (ISC_R_FAMILYMISMATCH);
! 4654: }
! 4655: /*
! 4656: * Only set SO_REUSEADDR when we want a specific port.
! 4657: */
! 4658: #ifdef AF_UNIX
! 4659: if (sock->pf == AF_UNIX)
! 4660: goto bind_socket;
! 4661: #endif
! 4662: if ((options & ISC_SOCKET_REUSEADDRESS) != 0 &&
! 4663: isc_sockaddr_getport(sockaddr) != (in_port_t)0 &&
! 4664: setsockopt(sock->fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on,
! 4665: sizeof(on)) < 0) {
! 4666: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 4667: "setsockopt(%d) %s", sock->fd,
! 4668: isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
! 4669: ISC_MSG_FAILED, "failed"));
! 4670: /* Press on... */
! 4671: }
! 4672: #ifdef AF_UNIX
! 4673: bind_socket:
! 4674: #endif
! 4675: if (bind(sock->fd, &sockaddr->type.sa, sockaddr->length) < 0) {
! 4676: inc_stats(sock->manager->stats,
! 4677: sock->statsindex[STATID_BINDFAIL]);
! 4678:
! 4679: UNLOCK(&sock->lock);
! 4680: switch (errno) {
! 4681: case EACCES:
! 4682: return (ISC_R_NOPERM);
! 4683: case EADDRNOTAVAIL:
! 4684: return (ISC_R_ADDRNOTAVAIL);
! 4685: case EADDRINUSE:
! 4686: return (ISC_R_ADDRINUSE);
! 4687: case EINVAL:
! 4688: return (ISC_R_BOUND);
! 4689: default:
! 4690: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4691: UNEXPECTED_ERROR(__FILE__, __LINE__, "bind: %s",
! 4692: strbuf);
! 4693: return (ISC_R_UNEXPECTED);
! 4694: }
! 4695: }
! 4696:
! 4697: socket_log(sock, sockaddr, TRACE,
! 4698: isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_BOUND, "bound");
! 4699: sock->bound = 1;
! 4700:
! 4701: UNLOCK(&sock->lock);
! 4702: return (ISC_R_SUCCESS);
! 4703: }
! 4704:
! 4705: isc_result_t
! 4706: isc_socket_filter(isc_socket_t *sock, const char *filter) {
! 4707: #ifdef SO_ACCEPTFILTER
! 4708: char strbuf[ISC_STRERRORSIZE];
! 4709: struct accept_filter_arg afa;
! 4710: #else
! 4711: UNUSED(sock);
! 4712: UNUSED(filter);
! 4713: #endif
! 4714:
! 4715: REQUIRE(VALID_SOCKET(sock));
! 4716:
! 4717: #ifdef SO_ACCEPTFILTER
! 4718: bzero(&afa, sizeof(afa));
! 4719: strncpy(afa.af_name, filter, sizeof(afa.af_name));
! 4720: if (setsockopt(sock->fd, SOL_SOCKET, SO_ACCEPTFILTER,
! 4721: &afa, sizeof(afa)) == -1) {
! 4722: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4723: socket_log(sock, NULL, CREATION, isc_msgcat, ISC_MSGSET_SOCKET,
! 4724: ISC_MSG_FILTER, "setsockopt(SO_ACCEPTFILTER): %s",
! 4725: strbuf);
! 4726: return (ISC_R_FAILURE);
! 4727: }
! 4728: return (ISC_R_SUCCESS);
! 4729: #else
! 4730: return (ISC_R_NOTIMPLEMENTED);
! 4731: #endif
! 4732: }
! 4733:
! 4734: /*
! 4735: * Set up to listen on a given socket. We do this by creating an internal
! 4736: * event that will be dispatched when the socket has read activity. The
! 4737: * watcher will send the internal event to the task when there is a new
! 4738: * connection.
! 4739: *
! 4740: * Unlike in read, we don't preallocate a done event here. Every time there
! 4741: * is a new connection we'll have to allocate a new one anyway, so we might
! 4742: * as well keep things simple rather than having to track them.
! 4743: */
! 4744: isc_result_t
! 4745: isc_socket_listen(isc_socket_t *sock, unsigned int backlog) {
! 4746: char strbuf[ISC_STRERRORSIZE];
! 4747:
! 4748: REQUIRE(VALID_SOCKET(sock));
! 4749:
! 4750: LOCK(&sock->lock);
! 4751:
! 4752: REQUIRE(!sock->listener);
! 4753: REQUIRE(sock->bound);
! 4754: REQUIRE(sock->type == isc_sockettype_tcp ||
! 4755: sock->type == isc_sockettype_unix);
! 4756:
! 4757: if (backlog == 0)
! 4758: backlog = SOMAXCONN;
! 4759:
! 4760: if (listen(sock->fd, (int)backlog) < 0) {
! 4761: UNLOCK(&sock->lock);
! 4762: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4763:
! 4764: UNEXPECTED_ERROR(__FILE__, __LINE__, "listen: %s", strbuf);
! 4765:
! 4766: return (ISC_R_UNEXPECTED);
! 4767: }
! 4768:
! 4769: sock->listener = 1;
! 4770:
! 4771: UNLOCK(&sock->lock);
! 4772: return (ISC_R_SUCCESS);
! 4773: }
! 4774:
! 4775: /*
! 4776: * This should try to do aggressive accept() XXXMLG
! 4777: */
! 4778: isc_result_t
! 4779: isc_socket_accept(isc_socket_t *sock,
! 4780: isc_task_t *task, isc_taskaction_t action, const void *arg)
! 4781: {
! 4782: isc_socket_newconnev_t *dev;
! 4783: isc_socketmgr_t *manager;
! 4784: isc_task_t *ntask = NULL;
! 4785: isc_socket_t *nsock;
! 4786: isc_result_t result;
! 4787: isc_boolean_t do_poke = ISC_FALSE;
! 4788:
! 4789: REQUIRE(VALID_SOCKET(sock));
! 4790: manager = sock->manager;
! 4791: REQUIRE(VALID_MANAGER(manager));
! 4792:
! 4793: LOCK(&sock->lock);
! 4794:
! 4795: REQUIRE(sock->listener);
! 4796:
! 4797: /*
! 4798: * Sender field is overloaded here with the task we will be sending
! 4799: * this event to. Just before the actual event is delivered the
! 4800: * actual ev_sender will be touched up to be the socket.
! 4801: */
! 4802: dev = (isc_socket_newconnev_t *)
! 4803: isc_event_allocate(manager->mctx, task, ISC_SOCKEVENT_NEWCONN,
! 4804: action, arg, sizeof(*dev));
! 4805: if (dev == NULL) {
! 4806: UNLOCK(&sock->lock);
! 4807: return (ISC_R_NOMEMORY);
! 4808: }
! 4809: ISC_LINK_INIT(dev, ev_link);
! 4810:
! 4811: result = allocate_socket(manager, sock->type, &nsock);
! 4812: if (result != ISC_R_SUCCESS) {
! 4813: isc_event_free(ISC_EVENT_PTR(&dev));
! 4814: UNLOCK(&sock->lock);
! 4815: return (result);
! 4816: }
! 4817:
! 4818: /*
! 4819: * Attach to socket and to task.
! 4820: */
! 4821: isc_task_attach(task, &ntask);
! 4822: nsock->references++;
! 4823: nsock->statsindex = sock->statsindex;
! 4824:
! 4825: dev->ev_sender = ntask;
! 4826: dev->newsocket = nsock;
! 4827:
! 4828: /*
! 4829: * Poke watcher here. We still have the socket locked, so there
! 4830: * is no race condition. We will keep the lock for such a short
! 4831: * bit of time waking it up now or later won't matter all that much.
! 4832: */
! 4833: if (ISC_LIST_EMPTY(sock->accept_list))
! 4834: do_poke = ISC_TRUE;
! 4835:
! 4836: ISC_LIST_ENQUEUE(sock->accept_list, dev, ev_link);
! 4837:
! 4838: if (do_poke)
! 4839: select_poke(manager, sock->fd, SELECT_POKE_ACCEPT);
! 4840:
! 4841: UNLOCK(&sock->lock);
! 4842: return (ISC_R_SUCCESS);
! 4843: }
! 4844:
! 4845: isc_result_t
! 4846: isc_socket_connect(isc_socket_t *sock, isc_sockaddr_t *addr,
! 4847: isc_task_t *task, isc_taskaction_t action, const void *arg)
! 4848: {
! 4849: isc_socket_connev_t *dev;
! 4850: isc_task_t *ntask = NULL;
! 4851: isc_socketmgr_t *manager;
! 4852: int cc;
! 4853: char strbuf[ISC_STRERRORSIZE];
! 4854:
! 4855: REQUIRE(VALID_SOCKET(sock));
! 4856: REQUIRE(addr != NULL);
! 4857: REQUIRE(task != NULL);
! 4858: REQUIRE(action != NULL);
! 4859:
! 4860: manager = sock->manager;
! 4861: REQUIRE(VALID_MANAGER(manager));
! 4862: REQUIRE(addr != NULL);
! 4863:
! 4864: if (isc_sockaddr_ismulticast(addr))
! 4865: return (ISC_R_MULTICAST);
! 4866:
! 4867: LOCK(&sock->lock);
! 4868:
! 4869: REQUIRE(!sock->connecting);
! 4870:
! 4871: dev = (isc_socket_connev_t *)isc_event_allocate(manager->mctx, sock,
! 4872: ISC_SOCKEVENT_CONNECT,
! 4873: action, arg,
! 4874: sizeof(*dev));
! 4875: if (dev == NULL) {
! 4876: UNLOCK(&sock->lock);
! 4877: return (ISC_R_NOMEMORY);
! 4878: }
! 4879: ISC_LINK_INIT(dev, ev_link);
! 4880:
! 4881: /*
! 4882: * Try to do the connect right away, as there can be only one
! 4883: * outstanding, and it might happen to complete.
! 4884: */
! 4885: sock->peer_address = *addr;
! 4886: cc = connect(sock->fd, &addr->type.sa, addr->length);
! 4887: if (cc < 0) {
! 4888: /*
! 4889: * HP-UX "fails" to connect a UDP socket and sets errno to
! 4890: * EINPROGRESS if it's non-blocking. We'd rather regard this as
! 4891: * a success and let the user detect it if it's really an error
! 4892: * at the time of sending a packet on the socket.
! 4893: */
! 4894: if (sock->type == isc_sockettype_udp && errno == EINPROGRESS) {
! 4895: cc = 0;
! 4896: goto success;
! 4897: }
! 4898: if (SOFT_ERROR(errno) || errno == EINPROGRESS)
! 4899: goto queue;
! 4900:
! 4901: switch (errno) {
! 4902: #define ERROR_MATCH(a, b) case a: dev->result = b; goto err_exit;
! 4903: ERROR_MATCH(EACCES, ISC_R_NOPERM);
! 4904: ERROR_MATCH(EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
! 4905: ERROR_MATCH(EAFNOSUPPORT, ISC_R_ADDRNOTAVAIL);
! 4906: ERROR_MATCH(ECONNREFUSED, ISC_R_CONNREFUSED);
! 4907: ERROR_MATCH(EHOSTUNREACH, ISC_R_HOSTUNREACH);
! 4908: #ifdef EHOSTDOWN
! 4909: ERROR_MATCH(EHOSTDOWN, ISC_R_HOSTUNREACH);
! 4910: #endif
! 4911: ERROR_MATCH(ENETUNREACH, ISC_R_NETUNREACH);
! 4912: ERROR_MATCH(ENOBUFS, ISC_R_NORESOURCES);
! 4913: ERROR_MATCH(EPERM, ISC_R_HOSTUNREACH);
! 4914: ERROR_MATCH(EPIPE, ISC_R_NOTCONNECTED);
! 4915: ERROR_MATCH(ECONNRESET, ISC_R_CONNECTIONRESET);
! 4916: #undef ERROR_MATCH
! 4917: }
! 4918:
! 4919: sock->connected = 0;
! 4920:
! 4921: isc__strerror(errno, strbuf, sizeof(strbuf));
! 4922: UNEXPECTED_ERROR(__FILE__, __LINE__, "%d/%s", errno, strbuf);
! 4923:
! 4924: UNLOCK(&sock->lock);
! 4925: inc_stats(sock->manager->stats,
! 4926: sock->statsindex[STATID_CONNECTFAIL]);
! 4927: isc_event_free(ISC_EVENT_PTR(&dev));
! 4928: return (ISC_R_UNEXPECTED);
! 4929:
! 4930: err_exit:
! 4931: sock->connected = 0;
! 4932: isc_task_send(task, ISC_EVENT_PTR(&dev));
! 4933:
! 4934: UNLOCK(&sock->lock);
! 4935: inc_stats(sock->manager->stats,
! 4936: sock->statsindex[STATID_CONNECTFAIL]);
! 4937: return (ISC_R_SUCCESS);
! 4938: }
! 4939:
! 4940: /*
! 4941: * If connect completed, fire off the done event.
! 4942: */
! 4943: success:
! 4944: if (cc == 0) {
! 4945: sock->connected = 1;
! 4946: sock->bound = 1;
! 4947: dev->result = ISC_R_SUCCESS;
! 4948: isc_task_send(task, ISC_EVENT_PTR(&dev));
! 4949:
! 4950: UNLOCK(&sock->lock);
! 4951:
! 4952: inc_stats(sock->manager->stats,
! 4953: sock->statsindex[STATID_CONNECT]);
! 4954:
! 4955: return (ISC_R_SUCCESS);
! 4956: }
! 4957:
! 4958: queue:
! 4959:
! 4960: /*
! 4961: * Attach to task.
! 4962: */
! 4963: isc_task_attach(task, &ntask);
! 4964:
! 4965: sock->connecting = 1;
! 4966:
! 4967: dev->ev_sender = ntask;
! 4968:
! 4969: /*
! 4970: * Poke watcher here. We still have the socket locked, so there
! 4971: * is no race condition. We will keep the lock for such a short
! 4972: * bit of time waking it up now or later won't matter all that much.
! 4973: */
! 4974: if (sock->connect_ev == NULL)
! 4975: select_poke(manager, sock->fd, SELECT_POKE_CONNECT);
! 4976:
! 4977: sock->connect_ev = dev;
! 4978:
! 4979: UNLOCK(&sock->lock);
! 4980: return (ISC_R_SUCCESS);
! 4981: }
! 4982:
! 4983: /*
! 4984: * Called when a socket with a pending connect() finishes.
! 4985: */
! 4986: static void
! 4987: internal_connect(isc_task_t *me, isc_event_t *ev) {
! 4988: isc_socket_t *sock;
! 4989: isc_socket_connev_t *dev;
! 4990: isc_task_t *task;
! 4991: int cc;
! 4992: ISC_SOCKADDR_LEN_T optlen;
! 4993: char strbuf[ISC_STRERRORSIZE];
! 4994: char peerbuf[ISC_SOCKADDR_FORMATSIZE];
! 4995:
! 4996: UNUSED(me);
! 4997: INSIST(ev->ev_type == ISC_SOCKEVENT_INTW);
! 4998:
! 4999: sock = ev->ev_sender;
! 5000: INSIST(VALID_SOCKET(sock));
! 5001:
! 5002: LOCK(&sock->lock);
! 5003:
! 5004: /*
! 5005: * When the internal event was sent the reference count was bumped
! 5006: * to keep the socket around for us. Decrement the count here.
! 5007: */
! 5008: INSIST(sock->references > 0);
! 5009: sock->references--;
! 5010: if (sock->references == 0) {
! 5011: UNLOCK(&sock->lock);
! 5012: destroy(&sock);
! 5013: return;
! 5014: }
! 5015:
! 5016: /*
! 5017: * Has this event been canceled?
! 5018: */
! 5019: dev = sock->connect_ev;
! 5020: if (dev == NULL) {
! 5021: INSIST(!sock->connecting);
! 5022: UNLOCK(&sock->lock);
! 5023: return;
! 5024: }
! 5025:
! 5026: INSIST(sock->connecting);
! 5027: sock->connecting = 0;
! 5028:
! 5029: /*
! 5030: * Get any possible error status here.
! 5031: */
! 5032: optlen = sizeof(cc);
! 5033: if (getsockopt(sock->fd, SOL_SOCKET, SO_ERROR,
! 5034: (void *)&cc, (void *)&optlen) < 0)
! 5035: cc = errno;
! 5036: else
! 5037: errno = cc;
! 5038:
! 5039: if (errno != 0) {
! 5040: /*
! 5041: * If the error is EAGAIN, just re-select on this
! 5042: * fd and pretend nothing strange happened.
! 5043: */
! 5044: if (SOFT_ERROR(errno) || errno == EINPROGRESS) {
! 5045: sock->connecting = 1;
! 5046: select_poke(sock->manager, sock->fd,
! 5047: SELECT_POKE_CONNECT);
! 5048: UNLOCK(&sock->lock);
! 5049:
! 5050: return;
! 5051: }
! 5052:
! 5053: inc_stats(sock->manager->stats,
! 5054: sock->statsindex[STATID_CONNECTFAIL]);
! 5055:
! 5056: /*
! 5057: * Translate other errors into ISC_R_* flavors.
! 5058: */
! 5059: switch (errno) {
! 5060: #define ERROR_MATCH(a, b) case a: dev->result = b; break;
! 5061: ERROR_MATCH(EACCES, ISC_R_NOPERM);
! 5062: ERROR_MATCH(EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
! 5063: ERROR_MATCH(EAFNOSUPPORT, ISC_R_ADDRNOTAVAIL);
! 5064: ERROR_MATCH(ECONNREFUSED, ISC_R_CONNREFUSED);
! 5065: ERROR_MATCH(EHOSTUNREACH, ISC_R_HOSTUNREACH);
! 5066: #ifdef EHOSTDOWN
! 5067: ERROR_MATCH(EHOSTDOWN, ISC_R_HOSTUNREACH);
! 5068: #endif
! 5069: ERROR_MATCH(ENETUNREACH, ISC_R_NETUNREACH);
! 5070: ERROR_MATCH(ENOBUFS, ISC_R_NORESOURCES);
! 5071: ERROR_MATCH(EPERM, ISC_R_HOSTUNREACH);
! 5072: ERROR_MATCH(EPIPE, ISC_R_NOTCONNECTED);
! 5073: ERROR_MATCH(ETIMEDOUT, ISC_R_TIMEDOUT);
! 5074: ERROR_MATCH(ECONNRESET, ISC_R_CONNECTIONRESET);
! 5075: #undef ERROR_MATCH
! 5076: default:
! 5077: dev->result = ISC_R_UNEXPECTED;
! 5078: isc_sockaddr_format(&sock->peer_address, peerbuf,
! 5079: sizeof(peerbuf));
! 5080: isc__strerror(errno, strbuf, sizeof(strbuf));
! 5081: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 5082: "internal_connect: connect(%s) %s",
! 5083: peerbuf, strbuf);
! 5084: }
! 5085: } else {
! 5086: inc_stats(sock->manager->stats,
! 5087: sock->statsindex[STATID_CONNECT]);
! 5088: dev->result = ISC_R_SUCCESS;
! 5089: sock->connected = 1;
! 5090: sock->bound = 1;
! 5091: }
! 5092:
! 5093: sock->connect_ev = NULL;
! 5094:
! 5095: UNLOCK(&sock->lock);
! 5096:
! 5097: task = dev->ev_sender;
! 5098: dev->ev_sender = sock;
! 5099: isc_task_sendanddetach(&task, ISC_EVENT_PTR(&dev));
! 5100: }
! 5101:
! 5102: isc_result_t
! 5103: isc_socket_getpeername(isc_socket_t *sock, isc_sockaddr_t *addressp) {
! 5104: isc_result_t result;
! 5105:
! 5106: REQUIRE(VALID_SOCKET(sock));
! 5107: REQUIRE(addressp != NULL);
! 5108:
! 5109: LOCK(&sock->lock);
! 5110:
! 5111: if (sock->connected) {
! 5112: *addressp = sock->peer_address;
! 5113: result = ISC_R_SUCCESS;
! 5114: } else {
! 5115: result = ISC_R_NOTCONNECTED;
! 5116: }
! 5117:
! 5118: UNLOCK(&sock->lock);
! 5119:
! 5120: return (result);
! 5121: }
! 5122:
! 5123: isc_result_t
! 5124: isc_socket_getsockname(isc_socket_t *sock, isc_sockaddr_t *addressp) {
! 5125: ISC_SOCKADDR_LEN_T len;
! 5126: isc_result_t result;
! 5127: char strbuf[ISC_STRERRORSIZE];
! 5128:
! 5129: REQUIRE(VALID_SOCKET(sock));
! 5130: REQUIRE(addressp != NULL);
! 5131:
! 5132: LOCK(&sock->lock);
! 5133:
! 5134: if (!sock->bound) {
! 5135: result = ISC_R_NOTBOUND;
! 5136: goto out;
! 5137: }
! 5138:
! 5139: result = ISC_R_SUCCESS;
! 5140:
! 5141: len = sizeof(addressp->type);
! 5142: if (getsockname(sock->fd, &addressp->type.sa, (void *)&len) < 0) {
! 5143: isc__strerror(errno, strbuf, sizeof(strbuf));
! 5144: UNEXPECTED_ERROR(__FILE__, __LINE__, "getsockname: %s",
! 5145: strbuf);
! 5146: result = ISC_R_UNEXPECTED;
! 5147: goto out;
! 5148: }
! 5149: addressp->length = (unsigned int)len;
! 5150:
! 5151: out:
! 5152: UNLOCK(&sock->lock);
! 5153:
! 5154: return (result);
! 5155: }
! 5156:
! 5157: /*
! 5158: * Run through the list of events on this socket, and cancel the ones
! 5159: * queued for task "task" of type "how". "how" is a bitmask.
! 5160: */
! 5161: void
! 5162: isc_socket_cancel(isc_socket_t *sock, isc_task_t *task, unsigned int how) {
! 5163:
! 5164: REQUIRE(VALID_SOCKET(sock));
! 5165:
! 5166: /*
! 5167: * Quick exit if there is nothing to do. Don't even bother locking
! 5168: * in this case.
! 5169: */
! 5170: if (how == 0)
! 5171: return;
! 5172:
! 5173: LOCK(&sock->lock);
! 5174:
! 5175: /*
! 5176: * All of these do the same thing, more or less.
! 5177: * Each will:
! 5178: * o If the internal event is marked as "posted" try to
! 5179: * remove it from the task's queue. If this fails, mark it
! 5180: * as canceled instead, and let the task clean it up later.
! 5181: * o For each I/O request for that task of that type, post
! 5182: * its done event with status of "ISC_R_CANCELED".
! 5183: * o Reset any state needed.
! 5184: */
! 5185: if (((how & ISC_SOCKCANCEL_RECV) == ISC_SOCKCANCEL_RECV)
! 5186: && !ISC_LIST_EMPTY(sock->recv_list)) {
! 5187: isc_socketevent_t *dev;
! 5188: isc_socketevent_t *next;
! 5189: isc_task_t *current_task;
! 5190:
! 5191: dev = ISC_LIST_HEAD(sock->recv_list);
! 5192:
! 5193: while (dev != NULL) {
! 5194: current_task = dev->ev_sender;
! 5195: next = ISC_LIST_NEXT(dev, ev_link);
! 5196:
! 5197: if ((task == NULL) || (task == current_task)) {
! 5198: dev->result = ISC_R_CANCELED;
! 5199: send_recvdone_event(sock, &dev);
! 5200: }
! 5201: dev = next;
! 5202: }
! 5203: }
! 5204:
! 5205: if (((how & ISC_SOCKCANCEL_SEND) == ISC_SOCKCANCEL_SEND)
! 5206: && !ISC_LIST_EMPTY(sock->send_list)) {
! 5207: isc_socketevent_t *dev;
! 5208: isc_socketevent_t *next;
! 5209: isc_task_t *current_task;
! 5210:
! 5211: dev = ISC_LIST_HEAD(sock->send_list);
! 5212:
! 5213: while (dev != NULL) {
! 5214: current_task = dev->ev_sender;
! 5215: next = ISC_LIST_NEXT(dev, ev_link);
! 5216:
! 5217: if ((task == NULL) || (task == current_task)) {
! 5218: dev->result = ISC_R_CANCELED;
! 5219: send_senddone_event(sock, &dev);
! 5220: }
! 5221: dev = next;
! 5222: }
! 5223: }
! 5224:
! 5225: if (((how & ISC_SOCKCANCEL_ACCEPT) == ISC_SOCKCANCEL_ACCEPT)
! 5226: && !ISC_LIST_EMPTY(sock->accept_list)) {
! 5227: isc_socket_newconnev_t *dev;
! 5228: isc_socket_newconnev_t *next;
! 5229: isc_task_t *current_task;
! 5230:
! 5231: dev = ISC_LIST_HEAD(sock->accept_list);
! 5232: while (dev != NULL) {
! 5233: current_task = dev->ev_sender;
! 5234: next = ISC_LIST_NEXT(dev, ev_link);
! 5235:
! 5236: if ((task == NULL) || (task == current_task)) {
! 5237:
! 5238: ISC_LIST_UNLINK(sock->accept_list, dev,
! 5239: ev_link);
! 5240:
! 5241: dev->newsocket->references--;
! 5242: free_socket(&dev->newsocket);
! 5243:
! 5244: dev->result = ISC_R_CANCELED;
! 5245: dev->ev_sender = sock;
! 5246: isc_task_sendanddetach(¤t_task,
! 5247: ISC_EVENT_PTR(&dev));
! 5248: }
! 5249:
! 5250: dev = next;
! 5251: }
! 5252: }
! 5253:
! 5254: /*
! 5255: * Connecting is not a list.
! 5256: */
! 5257: if (((how & ISC_SOCKCANCEL_CONNECT) == ISC_SOCKCANCEL_CONNECT)
! 5258: && sock->connect_ev != NULL) {
! 5259: isc_socket_connev_t *dev;
! 5260: isc_task_t *current_task;
! 5261:
! 5262: INSIST(sock->connecting);
! 5263: sock->connecting = 0;
! 5264:
! 5265: dev = sock->connect_ev;
! 5266: current_task = dev->ev_sender;
! 5267:
! 5268: if ((task == NULL) || (task == current_task)) {
! 5269: sock->connect_ev = NULL;
! 5270:
! 5271: dev->result = ISC_R_CANCELED;
! 5272: dev->ev_sender = sock;
! 5273: isc_task_sendanddetach(¤t_task,
! 5274: ISC_EVENT_PTR(&dev));
! 5275: }
! 5276: }
! 5277:
! 5278: UNLOCK(&sock->lock);
! 5279: }
! 5280:
! 5281: isc_sockettype_t
! 5282: isc_socket_gettype(isc_socket_t *sock) {
! 5283: REQUIRE(VALID_SOCKET(sock));
! 5284:
! 5285: return (sock->type);
! 5286: }
! 5287:
! 5288: isc_boolean_t
! 5289: isc_socket_isbound(isc_socket_t *sock) {
! 5290: isc_boolean_t val;
! 5291:
! 5292: LOCK(&sock->lock);
! 5293: val = ((sock->bound) ? ISC_TRUE : ISC_FALSE);
! 5294: UNLOCK(&sock->lock);
! 5295:
! 5296: return (val);
! 5297: }
! 5298:
! 5299: void
! 5300: isc_socket_ipv6only(isc_socket_t *sock, isc_boolean_t yes) {
! 5301: #if defined(IPV6_V6ONLY)
! 5302: int onoff = yes ? 1 : 0;
! 5303: #else
! 5304: UNUSED(yes);
! 5305: UNUSED(sock);
! 5306: #endif
! 5307:
! 5308: REQUIRE(VALID_SOCKET(sock));
! 5309:
! 5310: #ifdef IPV6_V6ONLY
! 5311: if (sock->pf == AF_INET6) {
! 5312: if (setsockopt(sock->fd, IPPROTO_IPV6, IPV6_V6ONLY,
! 5313: (void *)&onoff, sizeof(int)) < 0) {
! 5314: char strbuf[ISC_STRERRORSIZE];
! 5315:
! 5316: UNEXPECTED_ERROR(__FILE__, __LINE__,
! 5317: "setsockopt(%d, IPV6_V6ONLY) "
! 5318: "%s: %s", sock->fd,
! 5319: isc_msgcat_get(isc_msgcat,
! 5320: ISC_MSGSET_GENERAL,
! 5321: ISC_MSG_FAILED,
! 5322: "failed"),
! 5323: strbuf);
! 5324: }
! 5325: }
! 5326: FIX_IPV6_RECVPKTINFO(sock); /* AIX */
! 5327: #endif
! 5328: }
! 5329:
! 5330: #ifndef ISC_PLATFORM_USETHREADS
! 5331: /* In our assumed scenario, we can simply use a single static object. */
! 5332: static isc_socketwait_t swait_private;
! 5333:
! 5334: int
! 5335: isc__socketmgr_waitevents(struct timeval *tvp, isc_socketwait_t **swaitp) {
! 5336: int n;
! 5337: #ifdef USE_KQUEUE
! 5338: struct timespec ts, *tsp;
! 5339: #endif
! 5340: #ifdef USE_EPOLL
! 5341: int timeout;
! 5342: #endif
! 5343: #ifdef USE_DEVPOLL
! 5344: struct dvpoll dvp;
! 5345: #endif
! 5346:
! 5347: REQUIRE(swaitp != NULL && *swaitp == NULL);
! 5348:
! 5349: if (socketmgr == NULL)
! 5350: return (0);
! 5351:
! 5352: #ifdef USE_KQUEUE
! 5353: if (tvp != NULL) {
! 5354: ts.tv_sec = tvp->tv_sec;
! 5355: ts.tv_nsec = tvp->tv_usec * 1000;
! 5356: tsp = &ts;
! 5357: } else
! 5358: tsp = NULL;
! 5359: swait_private.nevents = kevent(socketmgr->kqueue_fd, NULL, 0,
! 5360: socketmgr->events, socketmgr->nevents,
! 5361: tsp);
! 5362: n = swait_private.nevents;
! 5363: #elif defined(USE_EPOLL)
! 5364: if (tvp != NULL)
! 5365: timeout = tvp->tv_sec * 1000 + (tvp->tv_usec + 999) / 1000;
! 5366: else
! 5367: timeout = -1;
! 5368: swait_private.nevents = epoll_wait(socketmgr->epoll_fd,
! 5369: socketmgr->events,
! 5370: socketmgr->nevents, timeout);
! 5371: n = swait_private.nevents;
! 5372: #elif defined(USE_DEVPOLL)
! 5373: dvp.dp_fds = socketmgr->events;
! 5374: dvp.dp_nfds = socketmgr->nevents;
! 5375: if (tvp != NULL) {
! 5376: dvp.dp_timeout = tvp->tv_sec * 1000 +
! 5377: (tvp->tv_usec + 999) / 1000;
! 5378: } else
! 5379: dvp.dp_timeout = -1;
! 5380: swait_private.nevents = ioctl(socketmgr->devpoll_fd, DP_POLL, &dvp);
! 5381: n = swait_private.nevents;
! 5382: #elif defined(USE_SELECT)
! 5383: memcpy(socketmgr->read_fds_copy, socketmgr->read_fds,
! 5384: socketmgr->fd_bufsize);
! 5385: memcpy(socketmgr->write_fds_copy, socketmgr->write_fds,
! 5386: socketmgr->fd_bufsize);
! 5387:
! 5388: swait_private.readset = socketmgr->read_fds_copy;
! 5389: swait_private.writeset = socketmgr->write_fds_copy;
! 5390: swait_private.maxfd = socketmgr->maxfd + 1;
! 5391:
! 5392: n = select(swait_private.maxfd, swait_private.readset,
! 5393: swait_private.writeset, NULL, tvp);
! 5394: #endif
! 5395:
! 5396: *swaitp = &swait_private;
! 5397: return (n);
! 5398: }
! 5399:
! 5400: isc_result_t
! 5401: isc__socketmgr_dispatch(isc_socketwait_t *swait) {
! 5402: REQUIRE(swait == &swait_private);
! 5403:
! 5404: if (socketmgr == NULL)
! 5405: return (ISC_R_NOTFOUND);
! 5406:
! 5407: #if defined(USE_KQUEUE) || defined(USE_EPOLL) || defined(USE_DEVPOLL)
! 5408: (void)process_fds(socketmgr, socketmgr->events, swait->nevents);
! 5409: return (ISC_R_SUCCESS);
! 5410: #elif defined(USE_SELECT)
! 5411: process_fds(socketmgr, swait->maxfd, swait->readset, swait->writeset);
! 5412: return (ISC_R_SUCCESS);
! 5413: #endif
! 5414: }
! 5415: #endif /* ISC_PLATFORM_USETHREADS */
! 5416:
! 5417: void
! 5418: isc_socket_setname(isc_socket_t *socket, const char *name, void *tag) {
! 5419:
! 5420: /*
! 5421: * Name 'socket'.
! 5422: */
! 5423:
! 5424: REQUIRE(VALID_SOCKET(socket));
! 5425:
! 5426: LOCK(&socket->lock);
! 5427: memset(socket->name, 0, sizeof(socket->name));
! 5428: strncpy(socket->name, name, sizeof(socket->name) - 1);
! 5429: socket->tag = tag;
! 5430: UNLOCK(&socket->lock);
! 5431: }
! 5432:
! 5433: const char *
! 5434: isc_socket_getname(isc_socket_t *socket) {
! 5435: return (socket->name);
! 5436: }
! 5437:
! 5438: void *
! 5439: isc_socket_gettag(isc_socket_t *socket) {
! 5440: return (socket->tag);
! 5441: }
! 5442:
! 5443: #ifdef HAVE_LIBXML2
! 5444:
! 5445: static const char *
! 5446: _socktype(isc_sockettype_t type)
! 5447: {
! 5448: if (type == isc_sockettype_udp)
! 5449: return ("udp");
! 5450: else if (type == isc_sockettype_tcp)
! 5451: return ("tcp");
! 5452: else if (type == isc_sockettype_unix)
! 5453: return ("unix");
! 5454: else if (type == isc_sockettype_fdwatch)
! 5455: return ("fdwatch");
! 5456: else
! 5457: return ("not-initialized");
! 5458: }
! 5459:
! 5460: void
! 5461: isc_socketmgr_renderxml(isc_socketmgr_t *mgr, xmlTextWriterPtr writer)
! 5462: {
! 5463: isc_socket_t *sock;
! 5464: char peerbuf[ISC_SOCKADDR_FORMATSIZE];
! 5465: isc_sockaddr_t addr;
! 5466: ISC_SOCKADDR_LEN_T len;
! 5467:
! 5468: LOCK(&mgr->lock);
! 5469:
! 5470: #ifndef ISC_PLATFORM_USETHREADS
! 5471: xmlTextWriterStartElement(writer, ISC_XMLCHAR "references");
! 5472: xmlTextWriterWriteFormatString(writer, "%d", mgr->refs);
! 5473: xmlTextWriterEndElement(writer);
! 5474: #endif
! 5475:
! 5476: xmlTextWriterStartElement(writer, ISC_XMLCHAR "sockets");
! 5477: sock = ISC_LIST_HEAD(mgr->socklist);
! 5478: while (sock != NULL) {
! 5479: LOCK(&sock->lock);
! 5480: xmlTextWriterStartElement(writer, ISC_XMLCHAR "socket");
! 5481:
! 5482: xmlTextWriterStartElement(writer, ISC_XMLCHAR "id");
! 5483: xmlTextWriterWriteFormatString(writer, "%p", sock);
! 5484: xmlTextWriterEndElement(writer);
! 5485:
! 5486: if (sock->name[0] != 0) {
! 5487: xmlTextWriterStartElement(writer, ISC_XMLCHAR "name");
! 5488: xmlTextWriterWriteFormatString(writer, "%s",
! 5489: sock->name);
! 5490: xmlTextWriterEndElement(writer); /* name */
! 5491: }
! 5492:
! 5493: xmlTextWriterStartElement(writer, ISC_XMLCHAR "references");
! 5494: xmlTextWriterWriteFormatString(writer, "%d", sock->references);
! 5495: xmlTextWriterEndElement(writer);
! 5496:
! 5497: xmlTextWriterWriteElement(writer, ISC_XMLCHAR "type",
! 5498: ISC_XMLCHAR _socktype(sock->type));
! 5499:
! 5500: if (sock->connected) {
! 5501: isc_sockaddr_format(&sock->peer_address, peerbuf,
! 5502: sizeof(peerbuf));
! 5503: xmlTextWriterWriteElement(writer,
! 5504: ISC_XMLCHAR "peer-address",
! 5505: ISC_XMLCHAR peerbuf);
! 5506: }
! 5507:
! 5508: len = sizeof(addr);
! 5509: if (getsockname(sock->fd, &addr.type.sa, (void *)&len) == 0) {
! 5510: isc_sockaddr_format(&addr, peerbuf, sizeof(peerbuf));
! 5511: xmlTextWriterWriteElement(writer,
! 5512: ISC_XMLCHAR "local-address",
! 5513: ISC_XMLCHAR peerbuf);
! 5514: }
! 5515:
! 5516: xmlTextWriterStartElement(writer, ISC_XMLCHAR "states");
! 5517: if (sock->pending_recv)
! 5518: xmlTextWriterWriteElement(writer, ISC_XMLCHAR "state",
! 5519: ISC_XMLCHAR "pending-receive");
! 5520: if (sock->pending_send)
! 5521: xmlTextWriterWriteElement(writer, ISC_XMLCHAR "state",
! 5522: ISC_XMLCHAR "pending-send");
! 5523: if (sock->pending_accept)
! 5524: xmlTextWriterWriteElement(writer, ISC_XMLCHAR "state",
! 5525: ISC_XMLCHAR "pending_accept");
! 5526: if (sock->listener)
! 5527: xmlTextWriterWriteElement(writer, ISC_XMLCHAR "state",
! 5528: ISC_XMLCHAR "listener");
! 5529: if (sock->connected)
! 5530: xmlTextWriterWriteElement(writer, ISC_XMLCHAR "state",
! 5531: ISC_XMLCHAR "connected");
! 5532: if (sock->connecting)
! 5533: xmlTextWriterWriteElement(writer, ISC_XMLCHAR "state",
! 5534: ISC_XMLCHAR "connecting");
! 5535: if (sock->bound)
! 5536: xmlTextWriterWriteElement(writer, ISC_XMLCHAR "state",
! 5537: ISC_XMLCHAR "bound");
! 5538:
! 5539: xmlTextWriterEndElement(writer); /* states */
! 5540:
! 5541: xmlTextWriterEndElement(writer); /* socket */
! 5542:
! 5543: UNLOCK(&sock->lock);
! 5544: sock = ISC_LIST_NEXT(sock, link);
! 5545: }
! 5546: xmlTextWriterEndElement(writer); /* sockets */
! 5547:
! 5548: UNLOCK(&mgr->lock);
! 5549: }
! 5550: #endif /* HAVE_LIBXML2 */
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