Annotation of embedaddon/curl/tests/server/sockfilt.c, revision 1.1
1.1 ! misho 1: /***************************************************************************
! 2: * _ _ ____ _
! 3: * Project ___| | | | _ \| |
! 4: * / __| | | | |_) | |
! 5: * | (__| |_| | _ <| |___
! 6: * \___|\___/|_| \_\_____|
! 7: *
! 8: * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
! 9: *
! 10: * This software is licensed as described in the file COPYING, which
! 11: * you should have received as part of this distribution. The terms
! 12: * are also available at https://curl.haxx.se/docs/copyright.html.
! 13: *
! 14: * You may opt to use, copy, modify, merge, publish, distribute and/or sell
! 15: * copies of the Software, and permit persons to whom the Software is
! 16: * furnished to do so, under the terms of the COPYING file.
! 17: *
! 18: * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
! 19: * KIND, either express or implied.
! 20: *
! 21: ***************************************************************************/
! 22: #include "server_setup.h"
! 23:
! 24: /* Purpose
! 25: *
! 26: * 1. Accept a TCP connection on a custom port (IPv4 or IPv6), or connect
! 27: * to a given (localhost) port.
! 28: *
! 29: * 2. Get commands on STDIN. Pass data on to the TCP stream.
! 30: * Get data from TCP stream and pass on to STDOUT.
! 31: *
! 32: * This program is made to perform all the socket/stream/connection stuff for
! 33: * the test suite's (perl) FTP server. Previously the perl code did all of
! 34: * this by its own, but I decided to let this program do the socket layer
! 35: * because of several things:
! 36: *
! 37: * o We want the perl code to work with rather old perl installations, thus
! 38: * we cannot use recent perl modules or features.
! 39: *
! 40: * o We want IPv6 support for systems that provide it, and doing optional IPv6
! 41: * support in perl seems if not impossible so at least awkward.
! 42: *
! 43: * o We want FTP-SSL support, which means that a connection that starts with
! 44: * plain sockets needs to be able to "go SSL" in the midst. This would also
! 45: * require some nasty perl stuff I'd rather avoid.
! 46: *
! 47: * (Source originally based on sws.c)
! 48: */
! 49:
! 50: /*
! 51: * Signal handling notes for sockfilt
! 52: * ----------------------------------
! 53: *
! 54: * This program is a single-threaded process.
! 55: *
! 56: * This program is intended to be highly portable and as such it must be kept
! 57: * as simple as possible, due to this the only signal handling mechanisms used
! 58: * will be those of ANSI C, and used only in the most basic form which is good
! 59: * enough for the purpose of this program.
! 60: *
! 61: * For the above reason and the specific needs of this program signals SIGHUP,
! 62: * SIGPIPE and SIGALRM will be simply ignored on systems where this can be
! 63: * done. If possible, signals SIGINT and SIGTERM will be handled by this
! 64: * program as an indication to cleanup and finish execution as soon as
! 65: * possible. This will be achieved with a single signal handler
! 66: * 'exit_signal_handler' for both signals.
! 67: *
! 68: * The 'exit_signal_handler' upon the first SIGINT or SIGTERM received signal
! 69: * will just set to one the global var 'got_exit_signal' storing in global var
! 70: * 'exit_signal' the signal that triggered this change.
! 71: *
! 72: * Nothing fancy that could introduce problems is used, the program at certain
! 73: * points in its normal flow checks if var 'got_exit_signal' is set and in
! 74: * case this is true it just makes its way out of loops and functions in
! 75: * structured and well behaved manner to achieve proper program cleanup and
! 76: * termination.
! 77: *
! 78: * Even with the above mechanism implemented it is worthwile to note that
! 79: * other signals might still be received, or that there might be systems on
! 80: * which it is not possible to trap and ignore some of the above signals.
! 81: * This implies that for increased portability and reliability the program
! 82: * must be coded as if no signal was being ignored or handled at all. Enjoy
! 83: * it!
! 84: */
! 85:
! 86: #ifdef HAVE_SIGNAL_H
! 87: #include <signal.h>
! 88: #endif
! 89: #ifdef HAVE_NETINET_IN_H
! 90: #include <netinet/in.h>
! 91: #endif
! 92: #ifdef HAVE_NETINET_IN6_H
! 93: #include <netinet/in6.h>
! 94: #endif
! 95: #ifdef HAVE_ARPA_INET_H
! 96: #include <arpa/inet.h>
! 97: #endif
! 98: #ifdef HAVE_NETDB_H
! 99: #include <netdb.h>
! 100: #endif
! 101:
! 102: #define ENABLE_CURLX_PRINTF
! 103: /* make the curlx header define all printf() functions to use the curlx_*
! 104: versions instead */
! 105: #include "curlx.h" /* from the private lib dir */
! 106: #include "getpart.h"
! 107: #include "inet_pton.h"
! 108: #include "util.h"
! 109: #include "server_sockaddr.h"
! 110: #include "warnless.h"
! 111:
! 112: /* include memdebug.h last */
! 113: #include "memdebug.h"
! 114:
! 115: #ifdef USE_WINSOCK
! 116: #undef EINTR
! 117: #define EINTR 4 /* errno.h value */
! 118: #undef EAGAIN
! 119: #define EAGAIN 11 /* errno.h value */
! 120: #undef ENOMEM
! 121: #define ENOMEM 12 /* errno.h value */
! 122: #undef EINVAL
! 123: #define EINVAL 22 /* errno.h value */
! 124: #endif
! 125:
! 126: #define DEFAULT_PORT 8999
! 127:
! 128: #ifndef DEFAULT_LOGFILE
! 129: #define DEFAULT_LOGFILE "log/sockfilt.log"
! 130: #endif
! 131:
! 132: const char *serverlogfile = DEFAULT_LOGFILE;
! 133:
! 134: static bool verbose = FALSE;
! 135: static bool bind_only = FALSE;
! 136: #ifdef ENABLE_IPV6
! 137: static bool use_ipv6 = FALSE;
! 138: #endif
! 139: static const char *ipv_inuse = "IPv4";
! 140: static unsigned short port = DEFAULT_PORT;
! 141: static unsigned short connectport = 0; /* if non-zero, we activate this mode */
! 142:
! 143: enum sockmode {
! 144: PASSIVE_LISTEN, /* as a server waiting for connections */
! 145: PASSIVE_CONNECT, /* as a server, connected to a client */
! 146: ACTIVE, /* as a client, connected to a server */
! 147: ACTIVE_DISCONNECT /* as a client, disconnected from server */
! 148: };
! 149:
! 150: #ifdef WIN32
! 151: /*
! 152: * read-wrapper to support reading from stdin on Windows.
! 153: */
! 154: static ssize_t read_wincon(int fd, void *buf, size_t count)
! 155: {
! 156: HANDLE handle = NULL;
! 157: DWORD mode, rcount = 0;
! 158: BOOL success;
! 159:
! 160: if(fd == fileno(stdin)) {
! 161: handle = GetStdHandle(STD_INPUT_HANDLE);
! 162: }
! 163: else {
! 164: return read(fd, buf, count);
! 165: }
! 166:
! 167: if(GetConsoleMode(handle, &mode)) {
! 168: success = ReadConsole(handle, buf, curlx_uztoul(count), &rcount, NULL);
! 169: }
! 170: else {
! 171: success = ReadFile(handle, buf, curlx_uztoul(count), &rcount, NULL);
! 172: }
! 173: if(success) {
! 174: return rcount;
! 175: }
! 176:
! 177: errno = GetLastError();
! 178: return -1;
! 179: }
! 180: #undef read
! 181: #define read(a,b,c) read_wincon(a,b,c)
! 182:
! 183: /*
! 184: * write-wrapper to support writing to stdout and stderr on Windows.
! 185: */
! 186: static ssize_t write_wincon(int fd, const void *buf, size_t count)
! 187: {
! 188: HANDLE handle = NULL;
! 189: DWORD mode, wcount = 0;
! 190: BOOL success;
! 191:
! 192: if(fd == fileno(stdout)) {
! 193: handle = GetStdHandle(STD_OUTPUT_HANDLE);
! 194: }
! 195: else if(fd == fileno(stderr)) {
! 196: handle = GetStdHandle(STD_ERROR_HANDLE);
! 197: }
! 198: else {
! 199: return write(fd, buf, count);
! 200: }
! 201:
! 202: if(GetConsoleMode(handle, &mode)) {
! 203: success = WriteConsole(handle, buf, curlx_uztoul(count), &wcount, NULL);
! 204: }
! 205: else {
! 206: success = WriteFile(handle, buf, curlx_uztoul(count), &wcount, NULL);
! 207: }
! 208: if(success) {
! 209: return wcount;
! 210: }
! 211:
! 212: errno = GetLastError();
! 213: return -1;
! 214: }
! 215: #undef write
! 216: #define write(a,b,c) write_wincon(a,b,c)
! 217: #endif
! 218:
! 219: /*
! 220: * fullread is a wrapper around the read() function. This will repeat the call
! 221: * to read() until it actually has read the complete number of bytes indicated
! 222: * in nbytes or it fails with a condition that cannot be handled with a simple
! 223: * retry of the read call.
! 224: */
! 225:
! 226: static ssize_t fullread(int filedes, void *buffer, size_t nbytes)
! 227: {
! 228: int error;
! 229: ssize_t nread = 0;
! 230:
! 231: do {
! 232: ssize_t rc = read(filedes,
! 233: (unsigned char *)buffer + nread, nbytes - nread);
! 234:
! 235: if(got_exit_signal) {
! 236: logmsg("signalled to die");
! 237: return -1;
! 238: }
! 239:
! 240: if(rc < 0) {
! 241: error = errno;
! 242: if((error == EINTR) || (error == EAGAIN))
! 243: continue;
! 244: logmsg("reading from file descriptor: %d,", filedes);
! 245: logmsg("unrecoverable read() failure: (%d) %s",
! 246: error, strerror(error));
! 247: return -1;
! 248: }
! 249:
! 250: if(rc == 0) {
! 251: logmsg("got 0 reading from stdin");
! 252: return 0;
! 253: }
! 254:
! 255: nread += rc;
! 256:
! 257: } while((size_t)nread < nbytes);
! 258:
! 259: if(verbose)
! 260: logmsg("read %zd bytes", nread);
! 261:
! 262: return nread;
! 263: }
! 264:
! 265: /*
! 266: * fullwrite is a wrapper around the write() function. This will repeat the
! 267: * call to write() until it actually has written the complete number of bytes
! 268: * indicated in nbytes or it fails with a condition that cannot be handled
! 269: * with a simple retry of the write call.
! 270: */
! 271:
! 272: static ssize_t fullwrite(int filedes, const void *buffer, size_t nbytes)
! 273: {
! 274: int error;
! 275: ssize_t nwrite = 0;
! 276:
! 277: do {
! 278: ssize_t wc = write(filedes, (const unsigned char *)buffer + nwrite,
! 279: nbytes - nwrite);
! 280:
! 281: if(got_exit_signal) {
! 282: logmsg("signalled to die");
! 283: return -1;
! 284: }
! 285:
! 286: if(wc < 0) {
! 287: error = errno;
! 288: if((error == EINTR) || (error == EAGAIN))
! 289: continue;
! 290: logmsg("writing to file descriptor: %d,", filedes);
! 291: logmsg("unrecoverable write() failure: (%d) %s",
! 292: error, strerror(error));
! 293: return -1;
! 294: }
! 295:
! 296: if(wc == 0) {
! 297: logmsg("put 0 writing to stdout");
! 298: return 0;
! 299: }
! 300:
! 301: nwrite += wc;
! 302:
! 303: } while((size_t)nwrite < nbytes);
! 304:
! 305: if(verbose)
! 306: logmsg("wrote %zd bytes", nwrite);
! 307:
! 308: return nwrite;
! 309: }
! 310:
! 311: /*
! 312: * read_stdin tries to read from stdin nbytes into the given buffer. This is a
! 313: * blocking function that will only return TRUE when nbytes have actually been
! 314: * read or FALSE when an unrecoverable error has been detected. Failure of this
! 315: * function is an indication that the sockfilt process should terminate.
! 316: */
! 317:
! 318: static bool read_stdin(void *buffer, size_t nbytes)
! 319: {
! 320: ssize_t nread = fullread(fileno(stdin), buffer, nbytes);
! 321: if(nread != (ssize_t)nbytes) {
! 322: logmsg("exiting...");
! 323: return FALSE;
! 324: }
! 325: return TRUE;
! 326: }
! 327:
! 328: /*
! 329: * write_stdout tries to write to stdio nbytes from the given buffer. This is a
! 330: * blocking function that will only return TRUE when nbytes have actually been
! 331: * written or FALSE when an unrecoverable error has been detected. Failure of
! 332: * this function is an indication that the sockfilt process should terminate.
! 333: */
! 334:
! 335: static bool write_stdout(const void *buffer, size_t nbytes)
! 336: {
! 337: ssize_t nwrite = fullwrite(fileno(stdout), buffer, nbytes);
! 338: if(nwrite != (ssize_t)nbytes) {
! 339: logmsg("exiting...");
! 340: return FALSE;
! 341: }
! 342: return TRUE;
! 343: }
! 344:
! 345: static void lograw(unsigned char *buffer, ssize_t len)
! 346: {
! 347: char data[120];
! 348: ssize_t i;
! 349: unsigned char *ptr = buffer;
! 350: char *optr = data;
! 351: ssize_t width = 0;
! 352: int left = sizeof(data);
! 353:
! 354: for(i = 0; i<len; i++) {
! 355: switch(ptr[i]) {
! 356: case '\n':
! 357: msnprintf(optr, left, "\\n");
! 358: width += 2;
! 359: optr += 2;
! 360: left -= 2;
! 361: break;
! 362: case '\r':
! 363: msnprintf(optr, left, "\\r");
! 364: width += 2;
! 365: optr += 2;
! 366: left -= 2;
! 367: break;
! 368: default:
! 369: msnprintf(optr, left, "%c", (ISGRAPH(ptr[i]) ||
! 370: ptr[i] == 0x20) ?ptr[i]:'.');
! 371: width++;
! 372: optr++;
! 373: left--;
! 374: break;
! 375: }
! 376:
! 377: if(width>60) {
! 378: logmsg("'%s'", data);
! 379: width = 0;
! 380: optr = data;
! 381: left = sizeof(data);
! 382: }
! 383: }
! 384: if(width)
! 385: logmsg("'%s'", data);
! 386: }
! 387:
! 388: #ifdef USE_WINSOCK
! 389: /*
! 390: * WinSock select() does not support standard file descriptors,
! 391: * it can only check SOCKETs. The following function is an attempt
! 392: * to re-create a select() function with support for other handle types.
! 393: *
! 394: * select() function with support for WINSOCK2 sockets and all
! 395: * other handle types supported by WaitForMultipleObjectsEx() as
! 396: * well as disk files, anonymous and names pipes, and character input.
! 397: *
! 398: * https://msdn.microsoft.com/en-us/library/windows/desktop/ms687028.aspx
! 399: * https://msdn.microsoft.com/en-us/library/windows/desktop/ms741572.aspx
! 400: */
! 401: struct select_ws_wait_data {
! 402: HANDLE handle; /* actual handle to wait for during select */
! 403: HANDLE signal; /* internal event to signal handle trigger */
! 404: HANDLE abort; /* internal event to abort waiting thread */
! 405: HANDLE mutex; /* mutex to prevent event race-condition */
! 406: };
! 407: static DWORD WINAPI select_ws_wait_thread(LPVOID lpParameter)
! 408: {
! 409: struct select_ws_wait_data *data;
! 410: HANDLE mutex, signal, handle, handles[2];
! 411: INPUT_RECORD inputrecord;
! 412: LARGE_INTEGER size, pos;
! 413: DWORD type, length, ret;
! 414:
! 415: /* retrieve handles from internal structure */
! 416: data = (struct select_ws_wait_data *) lpParameter;
! 417: if(data) {
! 418: handle = data->handle;
! 419: handles[0] = data->abort;
! 420: handles[1] = handle;
! 421: signal = data->signal;
! 422: mutex = data->mutex;
! 423: free(data);
! 424: }
! 425: else
! 426: return (DWORD)-1;
! 427:
! 428: /* retrieve the type of file to wait on */
! 429: type = GetFileType(handle);
! 430: switch(type) {
! 431: case FILE_TYPE_DISK:
! 432: /* The handle represents a file on disk, this means:
! 433: * - WaitForMultipleObjectsEx will always be signalled for it.
! 434: * - comparison of current position in file and total size of
! 435: * the file can be used to check if we reached the end yet.
! 436: *
! 437: * Approach: Loop till either the internal event is signalled
! 438: * or if the end of the file has already been reached.
! 439: */
! 440: while(WaitForMultipleObjectsEx(1, handles, FALSE, 0, FALSE)
! 441: == WAIT_TIMEOUT) {
! 442: ret = WaitForSingleObjectEx(mutex, 0, FALSE);
! 443: if(ret == WAIT_OBJECT_0) {
! 444: /* get total size of file */
! 445: length = 0;
! 446: size.QuadPart = 0;
! 447: size.LowPart = GetFileSize(handle, &length);
! 448: if((size.LowPart != INVALID_FILE_SIZE) ||
! 449: (GetLastError() == NO_ERROR)) {
! 450: size.HighPart = length;
! 451: /* get the current position within the file */
! 452: pos.QuadPart = 0;
! 453: pos.LowPart = SetFilePointer(handle, 0, &pos.HighPart,
! 454: FILE_CURRENT);
! 455: if((pos.LowPart != INVALID_SET_FILE_POINTER) ||
! 456: (GetLastError() == NO_ERROR)) {
! 457: /* compare position with size, abort if not equal */
! 458: if(size.QuadPart == pos.QuadPart) {
! 459: /* sleep and continue waiting */
! 460: SleepEx(0, FALSE);
! 461: ReleaseMutex(mutex);
! 462: continue;
! 463: }
! 464: }
! 465: }
! 466: /* there is some data available, stop waiting */
! 467: logmsg("[select_ws_wait_thread] data available, DISK: %p", handle);
! 468: SetEvent(signal);
! 469: ReleaseMutex(mutex);
! 470: break;
! 471: }
! 472: else if(ret == WAIT_ABANDONED) {
! 473: /* we are not allowed to process this event, because select_ws
! 474: is post-processing the signalled events and we must exit. */
! 475: break;
! 476: }
! 477: }
! 478: break;
! 479:
! 480: case FILE_TYPE_CHAR:
! 481: /* The handle represents a character input, this means:
! 482: * - WaitForMultipleObjectsEx will be signalled on any kind of input,
! 483: * including mouse and window size events we do not care about.
! 484: *
! 485: * Approach: Loop till either the internal event is signalled
! 486: * or we get signalled for an actual key-event.
! 487: */
! 488: while(WaitForMultipleObjectsEx(2, handles, FALSE, INFINITE, FALSE)
! 489: == WAIT_OBJECT_0 + 1) {
! 490: ret = WaitForSingleObjectEx(mutex, 0, FALSE);
! 491: if(ret == WAIT_OBJECT_0) {
! 492: /* check if this is an actual console handle */
! 493: if(GetConsoleMode(handle, &ret)) {
! 494: /* retrieve an event from the console buffer */
! 495: length = 0;
! 496: if(PeekConsoleInput(handle, &inputrecord, 1, &length)) {
! 497: /* check if the event is not an actual key-event */
! 498: if(length == 1 && inputrecord.EventType != KEY_EVENT) {
! 499: /* purge the non-key-event and continue waiting */
! 500: ReadConsoleInput(handle, &inputrecord, 1, &length);
! 501: ReleaseMutex(mutex);
! 502: continue;
! 503: }
! 504: }
! 505: }
! 506: /* there is some data available, stop waiting */
! 507: logmsg("[select_ws_wait_thread] data available, CHAR: %p", handle);
! 508: SetEvent(signal);
! 509: ReleaseMutex(mutex);
! 510: break;
! 511: }
! 512: else if(ret == WAIT_ABANDONED) {
! 513: /* we are not allowed to process this event, because select_ws
! 514: is post-processing the signalled events and we must exit. */
! 515: break;
! 516: }
! 517: }
! 518: break;
! 519:
! 520: case FILE_TYPE_PIPE:
! 521: /* The handle represents an anonymous or named pipe, this means:
! 522: * - WaitForMultipleObjectsEx will always be signalled for it.
! 523: * - peek into the pipe and retrieve the amount of data available.
! 524: *
! 525: * Approach: Loop till either the internal event is signalled
! 526: * or there is data in the pipe available for reading.
! 527: */
! 528: while(WaitForMultipleObjectsEx(1, handles, FALSE, 0, FALSE)
! 529: == WAIT_TIMEOUT) {
! 530: ret = WaitForSingleObjectEx(mutex, 0, FALSE);
! 531: if(ret == WAIT_OBJECT_0) {
! 532: /* peek into the pipe and retrieve the amount of data available */
! 533: length = 0;
! 534: if(PeekNamedPipe(handle, NULL, 0, NULL, &length, NULL)) {
! 535: /* if there is no data available, sleep and continue waiting */
! 536: if(length == 0) {
! 537: SleepEx(0, FALSE);
! 538: ReleaseMutex(mutex);
! 539: continue;
! 540: }
! 541: else {
! 542: logmsg("[select_ws_wait_thread] PeekNamedPipe len: %d", length);
! 543: }
! 544: }
! 545: else {
! 546: /* if the pipe has NOT been closed, sleep and continue waiting */
! 547: ret = GetLastError();
! 548: if(ret != ERROR_BROKEN_PIPE) {
! 549: logmsg("[select_ws_wait_thread] PeekNamedPipe error: %d", ret);
! 550: SleepEx(0, FALSE);
! 551: ReleaseMutex(mutex);
! 552: continue;
! 553: }
! 554: else {
! 555: logmsg("[select_ws_wait_thread] pipe closed, PIPE: %p", handle);
! 556: }
! 557: }
! 558: /* there is some data available, stop waiting */
! 559: logmsg("[select_ws_wait_thread] data available, PIPE: %p", handle);
! 560: SetEvent(signal);
! 561: ReleaseMutex(mutex);
! 562: break;
! 563: }
! 564: else if(ret == WAIT_ABANDONED) {
! 565: /* we are not allowed to process this event, because select_ws
! 566: is post-processing the signalled events and we must exit. */
! 567: break;
! 568: }
! 569: }
! 570: break;
! 571:
! 572: default:
! 573: /* The handle has an unknown type, try to wait on it */
! 574: if(WaitForMultipleObjectsEx(2, handles, FALSE, INFINITE, FALSE)
! 575: == WAIT_OBJECT_0 + 1) {
! 576: if(WaitForSingleObjectEx(mutex, 0, FALSE) == WAIT_OBJECT_0) {
! 577: logmsg("[select_ws_wait_thread] data available, HANDLE: %p", handle);
! 578: SetEvent(signal);
! 579: ReleaseMutex(mutex);
! 580: }
! 581: }
! 582: break;
! 583: }
! 584:
! 585: return 0;
! 586: }
! 587: static HANDLE select_ws_wait(HANDLE handle, HANDLE signal,
! 588: HANDLE abort, HANDLE mutex)
! 589: {
! 590: struct select_ws_wait_data *data;
! 591: HANDLE thread = NULL;
! 592:
! 593: /* allocate internal waiting data structure */
! 594: data = malloc(sizeof(struct select_ws_wait_data));
! 595: if(data) {
! 596: data->handle = handle;
! 597: data->signal = signal;
! 598: data->abort = abort;
! 599: data->mutex = mutex;
! 600:
! 601: /* launch waiting thread */
! 602: thread = CreateThread(NULL, 0,
! 603: &select_ws_wait_thread,
! 604: data, 0, NULL);
! 605:
! 606: /* free data if thread failed to launch */
! 607: if(!thread) {
! 608: free(data);
! 609: }
! 610: }
! 611:
! 612: return thread;
! 613: }
! 614: struct select_ws_data {
! 615: int fd; /* provided file descriptor (indexed by nfd) */
! 616: long wsastate; /* internal pre-select state (indexed by nfd) */
! 617: curl_socket_t wsasock; /* internal socket handle (indexed by nws) */
! 618: WSAEVENT wsaevent; /* internal select event (indexed by nws) */
! 619: HANDLE signal; /* internal thread signal (indexed by nth) */
! 620: HANDLE thread; /* internal thread handle (indexed by nth) */
! 621: };
! 622: static int select_ws(int nfds, fd_set *readfds, fd_set *writefds,
! 623: fd_set *exceptfds, struct timeval *tv)
! 624: {
! 625: HANDLE abort, mutex, signal, handle, *handles;
! 626: DWORD timeout_ms, wait, nfd, nth, nws, i;
! 627: fd_set readsock, writesock, exceptsock;
! 628: struct select_ws_data *data;
! 629: WSANETWORKEVENTS wsaevents;
! 630: curl_socket_t wsasock;
! 631: int error, ret, fd;
! 632: WSAEVENT wsaevent;
! 633:
! 634: /* check if the input value is valid */
! 635: if(nfds < 0) {
! 636: errno = EINVAL;
! 637: return -1;
! 638: }
! 639:
! 640: /* convert struct timeval to milliseconds */
! 641: if(tv) {
! 642: timeout_ms = (tv->tv_sec*1000) + (DWORD)(((double)tv->tv_usec)/1000.0);
! 643: }
! 644: else {
! 645: timeout_ms = INFINITE;
! 646: }
! 647:
! 648: /* check if we got descriptors, sleep in case we got none */
! 649: if(!nfds) {
! 650: SleepEx(timeout_ms, FALSE);
! 651: return 0;
! 652: }
! 653:
! 654: /* create internal event to abort waiting threads */
! 655: abort = CreateEvent(NULL, TRUE, FALSE, NULL);
! 656: if(!abort) {
! 657: errno = ENOMEM;
! 658: return -1;
! 659: }
! 660:
! 661: /* create internal mutex to lock event handling in threads */
! 662: mutex = CreateMutex(NULL, FALSE, NULL);
! 663: if(!mutex) {
! 664: CloseHandle(abort);
! 665: errno = ENOMEM;
! 666: return -1;
! 667: }
! 668:
! 669: /* allocate internal array for the internal data */
! 670: data = calloc(nfds, sizeof(struct select_ws_data));
! 671: if(data == NULL) {
! 672: CloseHandle(abort);
! 673: CloseHandle(mutex);
! 674: errno = ENOMEM;
! 675: return -1;
! 676: }
! 677:
! 678: /* allocate internal array for the internal event handles */
! 679: handles = calloc(nfds, sizeof(HANDLE));
! 680: if(handles == NULL) {
! 681: CloseHandle(abort);
! 682: CloseHandle(mutex);
! 683: free(data);
! 684: errno = ENOMEM;
! 685: return -1;
! 686: }
! 687:
! 688: /* loop over the handles in the input descriptor sets */
! 689: nfd = 0; /* number of handled file descriptors */
! 690: nth = 0; /* number of interal waiting threads */
! 691: nws = 0; /* number of handled WINSOCK sockets */
! 692: for(fd = 0; fd < nfds; fd++) {
! 693: wsasock = curlx_sitosk(fd);
! 694: wsaevents.lNetworkEvents = 0;
! 695: handles[nfd] = 0;
! 696:
! 697: FD_ZERO(&readsock);
! 698: FD_ZERO(&writesock);
! 699: FD_ZERO(&exceptsock);
! 700:
! 701: if(FD_ISSET(wsasock, readfds)) {
! 702: FD_SET(wsasock, &readsock);
! 703: wsaevents.lNetworkEvents |= FD_READ|FD_ACCEPT|FD_CLOSE;
! 704: }
! 705:
! 706: if(FD_ISSET(wsasock, writefds)) {
! 707: FD_SET(wsasock, &writesock);
! 708: wsaevents.lNetworkEvents |= FD_WRITE|FD_CONNECT;
! 709: }
! 710:
! 711: if(FD_ISSET(wsasock, exceptfds)) {
! 712: FD_SET(wsasock, &exceptsock);
! 713: wsaevents.lNetworkEvents |= FD_OOB;
! 714: }
! 715:
! 716: /* only wait for events for which we actually care */
! 717: if(wsaevents.lNetworkEvents) {
! 718: data[nfd].fd = fd;
! 719: if(fd == fileno(stdin)) {
! 720: signal = CreateEvent(NULL, TRUE, FALSE, NULL);
! 721: if(signal) {
! 722: handle = GetStdHandle(STD_INPUT_HANDLE);
! 723: handle = select_ws_wait(handle, signal, abort, mutex);
! 724: if(handle) {
! 725: handles[nfd] = signal;
! 726: data[nth].signal = signal;
! 727: data[nth].thread = handle;
! 728: nth++;
! 729: }
! 730: else {
! 731: CloseHandle(signal);
! 732: }
! 733: }
! 734: }
! 735: else if(fd == fileno(stdout)) {
! 736: handles[nfd] = GetStdHandle(STD_OUTPUT_HANDLE);
! 737: }
! 738: else if(fd == fileno(stderr)) {
! 739: handles[nfd] = GetStdHandle(STD_ERROR_HANDLE);
! 740: }
! 741: else {
! 742: wsaevent = WSACreateEvent();
! 743: if(wsaevent != WSA_INVALID_EVENT) {
! 744: error = WSAEventSelect(wsasock, wsaevent, wsaevents.lNetworkEvents);
! 745: if(error != SOCKET_ERROR) {
! 746: handles[nfd] = (HANDLE)wsaevent;
! 747: data[nws].wsasock = wsasock;
! 748: data[nws].wsaevent = wsaevent;
! 749: data[nfd].wsastate = 0;
! 750: tv->tv_sec = 0;
! 751: tv->tv_usec = 0;
! 752: /* check if the socket is already ready */
! 753: if(select(fd + 1, &readsock, &writesock, &exceptsock, tv) == 1) {
! 754: logmsg("[select_ws] socket %d is ready", fd);
! 755: WSASetEvent(wsaevent);
! 756: if(FD_ISSET(wsasock, &readsock))
! 757: data[nfd].wsastate |= FD_READ;
! 758: if(FD_ISSET(wsasock, &writesock))
! 759: data[nfd].wsastate |= FD_WRITE;
! 760: if(FD_ISSET(wsasock, &exceptsock))
! 761: data[nfd].wsastate |= FD_OOB;
! 762: }
! 763: nws++;
! 764: }
! 765: else {
! 766: WSACloseEvent(wsaevent);
! 767: signal = CreateEvent(NULL, TRUE, FALSE, NULL);
! 768: if(signal) {
! 769: handle = (HANDLE)wsasock;
! 770: handle = select_ws_wait(handle, signal, abort, mutex);
! 771: if(handle) {
! 772: handles[nfd] = signal;
! 773: data[nth].signal = signal;
! 774: data[nth].thread = handle;
! 775: nth++;
! 776: }
! 777: else {
! 778: CloseHandle(signal);
! 779: }
! 780: }
! 781: }
! 782: }
! 783: }
! 784: nfd++;
! 785: }
! 786: }
! 787:
! 788: /* wait for one of the internal handles to trigger */
! 789: wait = WaitForMultipleObjectsEx(nfd, handles, FALSE, timeout_ms, FALSE);
! 790:
! 791: /* wait for internal mutex to lock event handling in threads */
! 792: WaitForSingleObjectEx(mutex, INFINITE, FALSE);
! 793:
! 794: /* loop over the internal handles returned in the descriptors */
! 795: ret = 0; /* number of ready file descriptors */
! 796: for(i = 0; i < nfd; i++) {
! 797: fd = data[i].fd;
! 798: handle = handles[i];
! 799: wsasock = curlx_sitosk(fd);
! 800:
! 801: /* check if the current internal handle was triggered */
! 802: if(wait != WAIT_FAILED && (wait - WAIT_OBJECT_0) <= i &&
! 803: WaitForSingleObjectEx(handle, 0, FALSE) == WAIT_OBJECT_0) {
! 804: /* first handle stdin, stdout and stderr */
! 805: if(fd == fileno(stdin)) {
! 806: /* stdin is never ready for write or exceptional */
! 807: FD_CLR(wsasock, writefds);
! 808: FD_CLR(wsasock, exceptfds);
! 809: }
! 810: else if(fd == fileno(stdout) || fd == fileno(stderr)) {
! 811: /* stdout and stderr are never ready for read or exceptional */
! 812: FD_CLR(wsasock, readfds);
! 813: FD_CLR(wsasock, exceptfds);
! 814: }
! 815: else {
! 816: /* try to handle the event with the WINSOCK2 functions */
! 817: wsaevents.lNetworkEvents = 0;
! 818: error = WSAEnumNetworkEvents(wsasock, handle, &wsaevents);
! 819: if(error != SOCKET_ERROR) {
! 820: /* merge result from pre-check using select */
! 821: wsaevents.lNetworkEvents |= data[i].wsastate;
! 822:
! 823: /* remove from descriptor set if not ready for read/accept/close */
! 824: if(!(wsaevents.lNetworkEvents & (FD_READ|FD_ACCEPT|FD_CLOSE)))
! 825: FD_CLR(wsasock, readfds);
! 826:
! 827: /* remove from descriptor set if not ready for write/connect */
! 828: if(!(wsaevents.lNetworkEvents & (FD_WRITE|FD_CONNECT)))
! 829: FD_CLR(wsasock, writefds);
! 830:
! 831: /* remove from descriptor set if not exceptional */
! 832: if(!(wsaevents.lNetworkEvents & (FD_OOB)))
! 833: FD_CLR(wsasock, exceptfds);
! 834: }
! 835: }
! 836:
! 837: /* check if the event has not been filtered using specific tests */
! 838: if(FD_ISSET(wsasock, readfds) || FD_ISSET(wsasock, writefds) ||
! 839: FD_ISSET(wsasock, exceptfds)) {
! 840: ret++;
! 841: }
! 842: }
! 843: else {
! 844: /* remove from all descriptor sets since this handle did not trigger */
! 845: FD_CLR(wsasock, readfds);
! 846: FD_CLR(wsasock, writefds);
! 847: FD_CLR(wsasock, exceptfds);
! 848: }
! 849: }
! 850:
! 851: /* signal the event handle for the other waiting threads */
! 852: SetEvent(abort);
! 853:
! 854: for(fd = 0; fd < nfds; fd++) {
! 855: if(FD_ISSET(fd, readfds))
! 856: logmsg("[select_ws] %d is readable", fd);
! 857: if(FD_ISSET(fd, writefds))
! 858: logmsg("[select_ws] %d is writable", fd);
! 859: if(FD_ISSET(fd, exceptfds))
! 860: logmsg("[select_ws] %d is exceptional", fd);
! 861: }
! 862:
! 863: for(i = 0; i < nws; i++) {
! 864: WSAEventSelect(data[i].wsasock, NULL, 0);
! 865: WSACloseEvent(data[i].wsaevent);
! 866: }
! 867:
! 868: for(i = 0; i < nth; i++) {
! 869: WaitForSingleObjectEx(data[i].thread, INFINITE, FALSE);
! 870: CloseHandle(data[i].thread);
! 871: CloseHandle(data[i].signal);
! 872: }
! 873:
! 874: CloseHandle(abort);
! 875: CloseHandle(mutex);
! 876:
! 877: free(handles);
! 878: free(data);
! 879:
! 880: return ret;
! 881: }
! 882: #define select(a,b,c,d,e) select_ws(a,b,c,d,e)
! 883: #endif /* USE_WINSOCK */
! 884:
! 885: /*
! 886: sockfdp is a pointer to an established stream or CURL_SOCKET_BAD
! 887:
! 888: if sockfd is CURL_SOCKET_BAD, listendfd is a listening socket we must
! 889: accept()
! 890: */
! 891: static bool juggle(curl_socket_t *sockfdp,
! 892: curl_socket_t listenfd,
! 893: enum sockmode *mode)
! 894: {
! 895: struct timeval timeout;
! 896: fd_set fds_read;
! 897: fd_set fds_write;
! 898: fd_set fds_err;
! 899: curl_socket_t sockfd = CURL_SOCKET_BAD;
! 900: int maxfd = -99;
! 901: ssize_t rc;
! 902: int error = 0;
! 903:
! 904: /* 'buffer' is this excessively large only to be able to support things like
! 905: test 1003 which tests exceedingly large server response lines */
! 906: unsigned char buffer[17010];
! 907: char data[16];
! 908:
! 909: if(got_exit_signal) {
! 910: logmsg("signalled to die, exiting...");
! 911: return FALSE;
! 912: }
! 913:
! 914: #ifdef HAVE_GETPPID
! 915: /* As a last resort, quit if sockfilt process becomes orphan. Just in case
! 916: parent ftpserver process has died without killing its sockfilt children */
! 917: if(getppid() <= 1) {
! 918: logmsg("process becomes orphan, exiting");
! 919: return FALSE;
! 920: }
! 921: #endif
! 922:
! 923: timeout.tv_sec = 120;
! 924: timeout.tv_usec = 0;
! 925:
! 926: FD_ZERO(&fds_read);
! 927: FD_ZERO(&fds_write);
! 928: FD_ZERO(&fds_err);
! 929:
! 930: FD_SET((curl_socket_t)fileno(stdin), &fds_read);
! 931:
! 932: switch(*mode) {
! 933:
! 934: case PASSIVE_LISTEN:
! 935:
! 936: /* server mode */
! 937: sockfd = listenfd;
! 938: /* there's always a socket to wait for */
! 939: FD_SET(sockfd, &fds_read);
! 940: maxfd = (int)sockfd;
! 941: break;
! 942:
! 943: case PASSIVE_CONNECT:
! 944:
! 945: sockfd = *sockfdp;
! 946: if(CURL_SOCKET_BAD == sockfd) {
! 947: /* eeek, we are supposedly connected and then this cannot be -1 ! */
! 948: logmsg("socket is -1! on %s:%d", __FILE__, __LINE__);
! 949: maxfd = 0; /* stdin */
! 950: }
! 951: else {
! 952: /* there's always a socket to wait for */
! 953: FD_SET(sockfd, &fds_read);
! 954: maxfd = (int)sockfd;
! 955: }
! 956: break;
! 957:
! 958: case ACTIVE:
! 959:
! 960: sockfd = *sockfdp;
! 961: /* sockfd turns CURL_SOCKET_BAD when our connection has been closed */
! 962: if(CURL_SOCKET_BAD != sockfd) {
! 963: FD_SET(sockfd, &fds_read);
! 964: maxfd = (int)sockfd;
! 965: }
! 966: else {
! 967: logmsg("No socket to read on");
! 968: maxfd = 0;
! 969: }
! 970: break;
! 971:
! 972: case ACTIVE_DISCONNECT:
! 973:
! 974: logmsg("disconnected, no socket to read on");
! 975: maxfd = 0;
! 976: sockfd = CURL_SOCKET_BAD;
! 977: break;
! 978:
! 979: } /* switch(*mode) */
! 980:
! 981:
! 982: do {
! 983:
! 984: /* select() blocking behavior call on blocking descriptors please */
! 985:
! 986: rc = select(maxfd + 1, &fds_read, &fds_write, &fds_err, &timeout);
! 987:
! 988: if(got_exit_signal) {
! 989: logmsg("signalled to die, exiting...");
! 990: return FALSE;
! 991: }
! 992:
! 993: } while((rc == -1) && ((error = errno) == EINTR));
! 994:
! 995: if(rc < 0) {
! 996: logmsg("select() failed with error: (%d) %s",
! 997: error, strerror(error));
! 998: return FALSE;
! 999: }
! 1000:
! 1001: if(rc == 0)
! 1002: /* timeout */
! 1003: return TRUE;
! 1004:
! 1005:
! 1006: if(FD_ISSET(fileno(stdin), &fds_read)) {
! 1007: ssize_t buffer_len;
! 1008: /* read from stdin, commands/data to be dealt with and possibly passed on
! 1009: to the socket
! 1010:
! 1011: protocol:
! 1012:
! 1013: 4 letter command + LF [mandatory]
! 1014:
! 1015: 4-digit hexadecimal data length + LF [if the command takes data]
! 1016: data [the data being as long as set above]
! 1017:
! 1018: Commands:
! 1019:
! 1020: DATA - plain pass-through data
! 1021: */
! 1022:
! 1023: if(!read_stdin(buffer, 5))
! 1024: return FALSE;
! 1025:
! 1026: logmsg("Received %c%c%c%c (on stdin)",
! 1027: buffer[0], buffer[1], buffer[2], buffer[3]);
! 1028:
! 1029: if(!memcmp("PING", buffer, 4)) {
! 1030: /* send reply on stdout, just proving we are alive */
! 1031: if(!write_stdout("PONG\n", 5))
! 1032: return FALSE;
! 1033: }
! 1034:
! 1035: else if(!memcmp("PORT", buffer, 4)) {
! 1036: /* Question asking us what PORT number we are listening to.
! 1037: Replies to PORT with "IPv[num]/[port]" */
! 1038: msnprintf((char *)buffer, sizeof(buffer), "%s/%hu\n", ipv_inuse, port);
! 1039: buffer_len = (ssize_t)strlen((char *)buffer);
! 1040: msnprintf(data, sizeof(data), "PORT\n%04zx\n", buffer_len);
! 1041: if(!write_stdout(data, 10))
! 1042: return FALSE;
! 1043: if(!write_stdout(buffer, buffer_len))
! 1044: return FALSE;
! 1045: }
! 1046: else if(!memcmp("QUIT", buffer, 4)) {
! 1047: /* just die */
! 1048: logmsg("quits");
! 1049: return FALSE;
! 1050: }
! 1051: else if(!memcmp("DATA", buffer, 4)) {
! 1052: /* data IN => data OUT */
! 1053:
! 1054: if(!read_stdin(buffer, 5))
! 1055: return FALSE;
! 1056:
! 1057: buffer[5] = '\0';
! 1058:
! 1059: buffer_len = (ssize_t)strtol((char *)buffer, NULL, 16);
! 1060: if(buffer_len > (ssize_t)sizeof(buffer)) {
! 1061: logmsg("ERROR: Buffer size (%zu bytes) too small for data size "
! 1062: "(%zd bytes)", sizeof(buffer), buffer_len);
! 1063: return FALSE;
! 1064: }
! 1065: logmsg("> %zd bytes data, server => client", buffer_len);
! 1066:
! 1067: if(!read_stdin(buffer, buffer_len))
! 1068: return FALSE;
! 1069:
! 1070: lograw(buffer, buffer_len);
! 1071:
! 1072: if(*mode == PASSIVE_LISTEN) {
! 1073: logmsg("*** We are disconnected!");
! 1074: if(!write_stdout("DISC\n", 5))
! 1075: return FALSE;
! 1076: }
! 1077: else {
! 1078: /* send away on the socket */
! 1079: ssize_t bytes_written = swrite(sockfd, buffer, buffer_len);
! 1080: if(bytes_written != buffer_len) {
! 1081: logmsg("Not all data was sent. Bytes to send: %zd sent: %zd",
! 1082: buffer_len, bytes_written);
! 1083: }
! 1084: }
! 1085: }
! 1086: else if(!memcmp("DISC", buffer, 4)) {
! 1087: /* disconnect! */
! 1088: if(!write_stdout("DISC\n", 5))
! 1089: return FALSE;
! 1090: if(sockfd != CURL_SOCKET_BAD) {
! 1091: logmsg("====> Client forcibly disconnected");
! 1092: sclose(sockfd);
! 1093: *sockfdp = CURL_SOCKET_BAD;
! 1094: if(*mode == PASSIVE_CONNECT)
! 1095: *mode = PASSIVE_LISTEN;
! 1096: else
! 1097: *mode = ACTIVE_DISCONNECT;
! 1098: }
! 1099: else
! 1100: logmsg("attempt to close already dead connection");
! 1101: return TRUE;
! 1102: }
! 1103: }
! 1104:
! 1105:
! 1106: if((sockfd != CURL_SOCKET_BAD) && (FD_ISSET(sockfd, &fds_read)) ) {
! 1107: ssize_t nread_socket;
! 1108: if(*mode == PASSIVE_LISTEN) {
! 1109: /* there's no stream set up yet, this is an indication that there's a
! 1110: client connecting. */
! 1111: curl_socket_t newfd = accept(sockfd, NULL, NULL);
! 1112: if(CURL_SOCKET_BAD == newfd) {
! 1113: error = SOCKERRNO;
! 1114: logmsg("accept(%d, NULL, NULL) failed with error: (%d) %s",
! 1115: sockfd, error, strerror(error));
! 1116: }
! 1117: else {
! 1118: logmsg("====> Client connect");
! 1119: if(!write_stdout("CNCT\n", 5))
! 1120: return FALSE;
! 1121: *sockfdp = newfd; /* store the new socket */
! 1122: *mode = PASSIVE_CONNECT; /* we have connected */
! 1123: }
! 1124: return TRUE;
! 1125: }
! 1126:
! 1127: /* read from socket, pass on data to stdout */
! 1128: nread_socket = sread(sockfd, buffer, sizeof(buffer));
! 1129:
! 1130: if(nread_socket > 0) {
! 1131: msnprintf(data, sizeof(data), "DATA\n%04zx\n", nread_socket);
! 1132: if(!write_stdout(data, 10))
! 1133: return FALSE;
! 1134: if(!write_stdout(buffer, nread_socket))
! 1135: return FALSE;
! 1136:
! 1137: logmsg("< %zd bytes data, client => server", nread_socket);
! 1138: lograw(buffer, nread_socket);
! 1139: }
! 1140:
! 1141: if(nread_socket <= 0) {
! 1142: logmsg("====> Client disconnect");
! 1143: if(!write_stdout("DISC\n", 5))
! 1144: return FALSE;
! 1145: sclose(sockfd);
! 1146: *sockfdp = CURL_SOCKET_BAD;
! 1147: if(*mode == PASSIVE_CONNECT)
! 1148: *mode = PASSIVE_LISTEN;
! 1149: else
! 1150: *mode = ACTIVE_DISCONNECT;
! 1151: return TRUE;
! 1152: }
! 1153: }
! 1154:
! 1155: return TRUE;
! 1156: }
! 1157:
! 1158: static curl_socket_t sockdaemon(curl_socket_t sock,
! 1159: unsigned short *listenport)
! 1160: {
! 1161: /* passive daemon style */
! 1162: srvr_sockaddr_union_t listener;
! 1163: int flag;
! 1164: int rc;
! 1165: int totdelay = 0;
! 1166: int maxretr = 10;
! 1167: int delay = 20;
! 1168: int attempt = 0;
! 1169: int error = 0;
! 1170:
! 1171: do {
! 1172: attempt++;
! 1173: flag = 1;
! 1174: rc = setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
! 1175: (void *)&flag, sizeof(flag));
! 1176: if(rc) {
! 1177: error = SOCKERRNO;
! 1178: logmsg("setsockopt(SO_REUSEADDR) failed with error: (%d) %s",
! 1179: error, strerror(error));
! 1180: if(maxretr) {
! 1181: rc = wait_ms(delay);
! 1182: if(rc) {
! 1183: /* should not happen */
! 1184: error = errno;
! 1185: logmsg("wait_ms() failed with error: (%d) %s",
! 1186: error, strerror(error));
! 1187: sclose(sock);
! 1188: return CURL_SOCKET_BAD;
! 1189: }
! 1190: if(got_exit_signal) {
! 1191: logmsg("signalled to die, exiting...");
! 1192: sclose(sock);
! 1193: return CURL_SOCKET_BAD;
! 1194: }
! 1195: totdelay += delay;
! 1196: delay *= 2; /* double the sleep for next attempt */
! 1197: }
! 1198: }
! 1199: } while(rc && maxretr--);
! 1200:
! 1201: if(rc) {
! 1202: logmsg("setsockopt(SO_REUSEADDR) failed %d times in %d ms. Error: (%d) %s",
! 1203: attempt, totdelay, error, strerror(error));
! 1204: logmsg("Continuing anyway...");
! 1205: }
! 1206:
! 1207: /* When the specified listener port is zero, it is actually a
! 1208: request to let the system choose a non-zero available port. */
! 1209:
! 1210: #ifdef ENABLE_IPV6
! 1211: if(!use_ipv6) {
! 1212: #endif
! 1213: memset(&listener.sa4, 0, sizeof(listener.sa4));
! 1214: listener.sa4.sin_family = AF_INET;
! 1215: listener.sa4.sin_addr.s_addr = INADDR_ANY;
! 1216: listener.sa4.sin_port = htons(*listenport);
! 1217: rc = bind(sock, &listener.sa, sizeof(listener.sa4));
! 1218: #ifdef ENABLE_IPV6
! 1219: }
! 1220: else {
! 1221: memset(&listener.sa6, 0, sizeof(listener.sa6));
! 1222: listener.sa6.sin6_family = AF_INET6;
! 1223: listener.sa6.sin6_addr = in6addr_any;
! 1224: listener.sa6.sin6_port = htons(*listenport);
! 1225: rc = bind(sock, &listener.sa, sizeof(listener.sa6));
! 1226: }
! 1227: #endif /* ENABLE_IPV6 */
! 1228: if(rc) {
! 1229: error = SOCKERRNO;
! 1230: logmsg("Error binding socket on port %hu: (%d) %s",
! 1231: *listenport, error, strerror(error));
! 1232: sclose(sock);
! 1233: return CURL_SOCKET_BAD;
! 1234: }
! 1235:
! 1236: if(!*listenport) {
! 1237: /* The system was supposed to choose a port number, figure out which
! 1238: port we actually got and update the listener port value with it. */
! 1239: curl_socklen_t la_size;
! 1240: srvr_sockaddr_union_t localaddr;
! 1241: #ifdef ENABLE_IPV6
! 1242: if(!use_ipv6)
! 1243: #endif
! 1244: la_size = sizeof(localaddr.sa4);
! 1245: #ifdef ENABLE_IPV6
! 1246: else
! 1247: la_size = sizeof(localaddr.sa6);
! 1248: #endif
! 1249: memset(&localaddr.sa, 0, (size_t)la_size);
! 1250: if(getsockname(sock, &localaddr.sa, &la_size) < 0) {
! 1251: error = SOCKERRNO;
! 1252: logmsg("getsockname() failed with error: (%d) %s",
! 1253: error, strerror(error));
! 1254: sclose(sock);
! 1255: return CURL_SOCKET_BAD;
! 1256: }
! 1257: switch(localaddr.sa.sa_family) {
! 1258: case AF_INET:
! 1259: *listenport = ntohs(localaddr.sa4.sin_port);
! 1260: break;
! 1261: #ifdef ENABLE_IPV6
! 1262: case AF_INET6:
! 1263: *listenport = ntohs(localaddr.sa6.sin6_port);
! 1264: break;
! 1265: #endif
! 1266: default:
! 1267: break;
! 1268: }
! 1269: if(!*listenport) {
! 1270: /* Real failure, listener port shall not be zero beyond this point. */
! 1271: logmsg("Apparently getsockname() succeeded, with listener port zero.");
! 1272: logmsg("A valid reason for this failure is a binary built without");
! 1273: logmsg("proper network library linkage. This might not be the only");
! 1274: logmsg("reason, but double check it before anything else.");
! 1275: sclose(sock);
! 1276: return CURL_SOCKET_BAD;
! 1277: }
! 1278: }
! 1279:
! 1280: /* bindonly option forces no listening */
! 1281: if(bind_only) {
! 1282: logmsg("instructed to bind port without listening");
! 1283: return sock;
! 1284: }
! 1285:
! 1286: /* start accepting connections */
! 1287: rc = listen(sock, 5);
! 1288: if(0 != rc) {
! 1289: error = SOCKERRNO;
! 1290: logmsg("listen(%d, 5) failed with error: (%d) %s",
! 1291: sock, error, strerror(error));
! 1292: sclose(sock);
! 1293: return CURL_SOCKET_BAD;
! 1294: }
! 1295:
! 1296: return sock;
! 1297: }
! 1298:
! 1299:
! 1300: int main(int argc, char *argv[])
! 1301: {
! 1302: srvr_sockaddr_union_t me;
! 1303: curl_socket_t sock = CURL_SOCKET_BAD;
! 1304: curl_socket_t msgsock = CURL_SOCKET_BAD;
! 1305: int wrotepidfile = 0;
! 1306: const char *pidname = ".sockfilt.pid";
! 1307: const char *portfile = NULL; /* none by default */
! 1308: bool juggle_again;
! 1309: int rc;
! 1310: int error;
! 1311: int arg = 1;
! 1312: enum sockmode mode = PASSIVE_LISTEN; /* default */
! 1313: const char *addr = NULL;
! 1314:
! 1315: while(argc>arg) {
! 1316: if(!strcmp("--version", argv[arg])) {
! 1317: printf("sockfilt IPv4%s\n",
! 1318: #ifdef ENABLE_IPV6
! 1319: "/IPv6"
! 1320: #else
! 1321: ""
! 1322: #endif
! 1323: );
! 1324: return 0;
! 1325: }
! 1326: else if(!strcmp("--verbose", argv[arg])) {
! 1327: verbose = TRUE;
! 1328: arg++;
! 1329: }
! 1330: else if(!strcmp("--pidfile", argv[arg])) {
! 1331: arg++;
! 1332: if(argc>arg)
! 1333: pidname = argv[arg++];
! 1334: }
! 1335: else if(!strcmp("--portfile", argv[arg])) {
! 1336: arg++;
! 1337: if(argc > arg)
! 1338: portfile = argv[arg++];
! 1339: }
! 1340: else if(!strcmp("--logfile", argv[arg])) {
! 1341: arg++;
! 1342: if(argc>arg)
! 1343: serverlogfile = argv[arg++];
! 1344: }
! 1345: else if(!strcmp("--ipv6", argv[arg])) {
! 1346: #ifdef ENABLE_IPV6
! 1347: ipv_inuse = "IPv6";
! 1348: use_ipv6 = TRUE;
! 1349: #endif
! 1350: arg++;
! 1351: }
! 1352: else if(!strcmp("--ipv4", argv[arg])) {
! 1353: /* for completeness, we support this option as well */
! 1354: #ifdef ENABLE_IPV6
! 1355: ipv_inuse = "IPv4";
! 1356: use_ipv6 = FALSE;
! 1357: #endif
! 1358: arg++;
! 1359: }
! 1360: else if(!strcmp("--bindonly", argv[arg])) {
! 1361: bind_only = TRUE;
! 1362: arg++;
! 1363: }
! 1364: else if(!strcmp("--port", argv[arg])) {
! 1365: arg++;
! 1366: if(argc>arg) {
! 1367: char *endptr;
! 1368: unsigned long ulnum = strtoul(argv[arg], &endptr, 10);
! 1369: port = curlx_ultous(ulnum);
! 1370: arg++;
! 1371: }
! 1372: }
! 1373: else if(!strcmp("--connect", argv[arg])) {
! 1374: /* Asked to actively connect to the specified local port instead of
! 1375: doing a passive server-style listening. */
! 1376: arg++;
! 1377: if(argc>arg) {
! 1378: char *endptr;
! 1379: unsigned long ulnum = strtoul(argv[arg], &endptr, 10);
! 1380: if((endptr != argv[arg] + strlen(argv[arg])) ||
! 1381: (ulnum < 1025UL) || (ulnum > 65535UL)) {
! 1382: fprintf(stderr, "sockfilt: invalid --connect argument (%s)\n",
! 1383: argv[arg]);
! 1384: return 0;
! 1385: }
! 1386: connectport = curlx_ultous(ulnum);
! 1387: arg++;
! 1388: }
! 1389: }
! 1390: else if(!strcmp("--addr", argv[arg])) {
! 1391: /* Set an IP address to use with --connect; otherwise use localhost */
! 1392: arg++;
! 1393: if(argc>arg) {
! 1394: addr = argv[arg];
! 1395: arg++;
! 1396: }
! 1397: }
! 1398: else {
! 1399: puts("Usage: sockfilt [option]\n"
! 1400: " --version\n"
! 1401: " --verbose\n"
! 1402: " --logfile [file]\n"
! 1403: " --pidfile [file]\n"
! 1404: " --ipv4\n"
! 1405: " --ipv6\n"
! 1406: " --bindonly\n"
! 1407: " --port [port]\n"
! 1408: " --connect [port]\n"
! 1409: " --addr [address]");
! 1410: return 0;
! 1411: }
! 1412: }
! 1413:
! 1414: #ifdef WIN32
! 1415: win32_init();
! 1416: atexit(win32_cleanup);
! 1417:
! 1418: setmode(fileno(stdin), O_BINARY);
! 1419: setmode(fileno(stdout), O_BINARY);
! 1420: setmode(fileno(stderr), O_BINARY);
! 1421: #endif
! 1422:
! 1423: install_signal_handlers(false);
! 1424:
! 1425: #ifdef ENABLE_IPV6
! 1426: if(!use_ipv6)
! 1427: #endif
! 1428: sock = socket(AF_INET, SOCK_STREAM, 0);
! 1429: #ifdef ENABLE_IPV6
! 1430: else
! 1431: sock = socket(AF_INET6, SOCK_STREAM, 0);
! 1432: #endif
! 1433:
! 1434: if(CURL_SOCKET_BAD == sock) {
! 1435: error = SOCKERRNO;
! 1436: logmsg("Error creating socket: (%d) %s",
! 1437: error, strerror(error));
! 1438: write_stdout("FAIL\n", 5);
! 1439: goto sockfilt_cleanup;
! 1440: }
! 1441:
! 1442: if(connectport) {
! 1443: /* Active mode, we should connect to the given port number */
! 1444: mode = ACTIVE;
! 1445: #ifdef ENABLE_IPV6
! 1446: if(!use_ipv6) {
! 1447: #endif
! 1448: memset(&me.sa4, 0, sizeof(me.sa4));
! 1449: me.sa4.sin_family = AF_INET;
! 1450: me.sa4.sin_port = htons(connectport);
! 1451: me.sa4.sin_addr.s_addr = INADDR_ANY;
! 1452: if(!addr)
! 1453: addr = "127.0.0.1";
! 1454: Curl_inet_pton(AF_INET, addr, &me.sa4.sin_addr);
! 1455:
! 1456: rc = connect(sock, &me.sa, sizeof(me.sa4));
! 1457: #ifdef ENABLE_IPV6
! 1458: }
! 1459: else {
! 1460: memset(&me.sa6, 0, sizeof(me.sa6));
! 1461: me.sa6.sin6_family = AF_INET6;
! 1462: me.sa6.sin6_port = htons(connectport);
! 1463: if(!addr)
! 1464: addr = "::1";
! 1465: Curl_inet_pton(AF_INET6, addr, &me.sa6.sin6_addr);
! 1466:
! 1467: rc = connect(sock, &me.sa, sizeof(me.sa6));
! 1468: }
! 1469: #endif /* ENABLE_IPV6 */
! 1470: if(rc) {
! 1471: error = SOCKERRNO;
! 1472: logmsg("Error connecting to port %hu: (%d) %s",
! 1473: connectport, error, strerror(error));
! 1474: write_stdout("FAIL\n", 5);
! 1475: goto sockfilt_cleanup;
! 1476: }
! 1477: logmsg("====> Client connect");
! 1478: msgsock = sock; /* use this as stream */
! 1479: }
! 1480: else {
! 1481: /* passive daemon style */
! 1482: sock = sockdaemon(sock, &port);
! 1483: if(CURL_SOCKET_BAD == sock) {
! 1484: write_stdout("FAIL\n", 5);
! 1485: goto sockfilt_cleanup;
! 1486: }
! 1487: msgsock = CURL_SOCKET_BAD; /* no stream socket yet */
! 1488: }
! 1489:
! 1490: logmsg("Running %s version", ipv_inuse);
! 1491:
! 1492: if(connectport)
! 1493: logmsg("Connected to port %hu", connectport);
! 1494: else if(bind_only)
! 1495: logmsg("Bound without listening on port %hu", port);
! 1496: else
! 1497: logmsg("Listening on port %hu", port);
! 1498:
! 1499: wrotepidfile = write_pidfile(pidname);
! 1500: if(!wrotepidfile) {
! 1501: write_stdout("FAIL\n", 5);
! 1502: goto sockfilt_cleanup;
! 1503: }
! 1504: if(portfile) {
! 1505: wrotepidfile = write_portfile(portfile, port);
! 1506: if(!wrotepidfile) {
! 1507: write_stdout("FAIL\n", 5);
! 1508: goto sockfilt_cleanup;
! 1509: }
! 1510: }
! 1511:
! 1512: do {
! 1513: juggle_again = juggle(&msgsock, sock, &mode);
! 1514: } while(juggle_again);
! 1515:
! 1516: sockfilt_cleanup:
! 1517:
! 1518: if((msgsock != sock) && (msgsock != CURL_SOCKET_BAD))
! 1519: sclose(msgsock);
! 1520:
! 1521: if(sock != CURL_SOCKET_BAD)
! 1522: sclose(sock);
! 1523:
! 1524: if(wrotepidfile)
! 1525: unlink(pidname);
! 1526:
! 1527: restore_signal_handlers(false);
! 1528:
! 1529: if(got_exit_signal) {
! 1530: logmsg("============> sockfilt exits with signal (%d)", exit_signal);
! 1531: /*
! 1532: * To properly set the return status of the process we
! 1533: * must raise the same signal SIGINT or SIGTERM that we
! 1534: * caught and let the old handler take care of it.
! 1535: */
! 1536: raise(exit_signal);
! 1537: }
! 1538:
! 1539: logmsg("============> sockfilt quits");
! 1540: return 0;
! 1541: }
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