Annotation of libaitio/inc/aitio.h, revision 1.36.2.7
1.1 misho 1: /*************************************************************************
1.8 misho 2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
1.1 misho 4: *
5: * $Author: misho $
1.36.2.7! misho 6: * $Id: aitio.h,v 1.36.2.6 2013/11/21 18:59:49 misho Exp $
1.1 misho 7: *
1.8 misho 8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
1.29 misho 15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
1.8 misho 16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
1.1 misho 46: #ifndef __AITIO_H
47: #define __AITIO_H
48:
49:
1.12 misho 50: #define COMPAT_43TTY
51:
1.8 misho 52: #include <assert.h>
1.24 misho 53: #include <syslog.h>
1.7 misho 54: #include <openssl/evp.h>
1.12 misho 55: #include <openssl/aes.h>
56: #include <sys/tty.h>
57: #include <sys/ioctl_compat.h>
1.13 misho 58: #include <sys/socket.h>
59: #include <sys/un.h>
1.24 misho 60: #include <sys/uio.h>
1.13 misho 61: #include <net/if_dl.h>
1.33 misho 62: #include <net/bpf.h>
1.13 misho 63: #include <netinet/in.h>
1.34 misho 64: #include <elwix.h>
1.36.2.1 misho 65: #include <aitsched.h>
1.7 misho 66:
67:
1.21 misho 68: #ifndef STRSIZ
1.34 misho 69: #define STRSIZ 256
1.21 misho 70: #endif
71:
1.34 misho 72: #define IO_SOCK_ROLE_CLIENT 0
73: #define IO_SOCK_ROLE_SERVER 1
74:
1.36 misho 75: #define IO_ETHER_FILTER_PROMISC 0
76: #define IO_ETHER_FILTER_NOTREAD -1
77: #define IO_ETHER_FILTER_READ 1
78: #define IO_ETHER_FILTER_WRITE 2
79:
1.34 misho 80:
1.35 misho 81: typedef struct tagCliSock sock_cli_t;
82: typedef void *(*sock_cb_t)(sock_cli_t*);
83: struct tagCliSock {
84: void *cli_parent;
85: int cli_fd;
86: int cli_pty;
87: sockaddr_t cli_addr;
88: char cli_name[64];
1.36.2.6 misho 89: char cli_cmdline[PATH_MAX];
1.35 misho 90:
1.36.2.2 misho 91: sched_task_func_t cli_func;
1.35 misho 92:
1.36.2.5 misho 93: ait_val_t cli_buf[2];
1.35 misho 94:
95: TAILQ_ENTRY(tagCliSock) cli_node;
96: };
1.36.2.2 misho 97:
1.34 misho 98: typedef struct {
1.35 misho 99: int sock_role;
100: int sock_backq;
101: int sock_type;
102: int sock_proto;
103: int sock_fd;
1.36.2.1 misho 104: struct timespec sock_timeout;
1.35 misho 105: sockaddr_t sock_addr;
106: sockaddr_t sock_peer;
1.34 misho 107:
1.35 misho 108: ait_val_t sock_buf;
1.34 misho 109:
1.36.2.1 misho 110: volatile intptr_t sock_kill;
111: sched_root_task_t *sock_root;
112:
1.35 misho 113: pthread_mutex_t sock_mtx;
114: TAILQ_HEAD(, tagCliSock) sock_cli;
1.34 misho 115: } sock_t;
116:
1.15 misho 117:
1.1 misho 118: // io_GetErrno() Get error code of last operation
1.30 misho 119: int io_GetErrno();
1.1 misho 120: // io_GetError() Get error text of last operation
1.30 misho 121: const char *io_GetError();
1.1 misho 122:
123:
1.12 misho 124: /*
1.34 misho 125: * ioInitSocket() - Init socket and allocate resources
126: *
127: * @role = Socket role
128: * @type = Socket type
129: * @proto = Socket protocol
130: * @addr = Bind to address
131: * @port = Bind to port
132: * @buflen = Socket buffer, optional if =0 == BUFSIZ
133: * return: NULL error or !=NULL created socket
134: */
135: sock_t *ioInitSocket(int role, int type, int proto,
136: const char *addr, unsigned short port, size_t buflen);
137: /*
138: * ioCloseSocket() - Close socket and free resources
139: *
140: * @s = Socket
141: * return: none
142: */
143: void ioCloseSocket(sock_t ** __restrict s);
1.36.2.4 misho 144: #define ioKillSocket(x) (assert((x)), (x)->sock_kill = 1)
145: /*
146: * ioCloseClient() - Close client socket
147: *
148: * @c = Client socket
149: * return: 0 ok or !=0 error
150: */
151: int ioCloseClient(sock_cli_t * __restrict c);
1.34 misho 152: /*
153: * ioUpSocket() - Setup socket for use
154: *
155: * @s = Socket
156: * @arg = Server role = listen backlog queue and Client role = peer address
1.36.2.1 misho 157: * @timeout = Socket timeout in ms (default -1 infinit)
1.34 misho 158: * return: -1 error or 0 ok
159: */
1.36.2.1 misho 160: int ioUpSocket(sock_t * __restrict s, void *arg, int timeout);
161: /*
1.36.2.2 misho 162: * ioUpdTimerSocket() - Update timeout of socket
163: *
164: * @c = Client socket
1.36.2.7! misho 165: * @arg = Optional data argument
1.36.2.2 misho 166: * return: none
167: */
1.36.2.7! misho 168: void ioUpdTimerSocket(sock_cli_t * __restrict c, void *arg);
1.36.2.2 misho 169: /*
1.36.2.1 misho 170: * ioLoopSocket() - Start socket scheduler
171: *
172: * @s = Socket
1.36.2.2 misho 173: * @rcb = Read callback
1.36.2.1 misho 174: * return: -1 error or return result from scheduler
175: */
1.36.2.2 misho 176: int ioLoopSocket(sock_t * __restrict s, sched_task_func_t rcb);
1.36.2.6 misho 177: /*
178: * ioBridgeProg2Socket() - Start socket scheduler and bridge program to socket
179: *
180: * @s = Socket
181: * @prgname = Program name
182: * return: 0 ok or !=0 error
183: */
184: int ioBridgeProg2Socket(sock_t * __restrict s, const char *prgname);
1.34 misho 185:
186: /*
1.17 misho 187: * ioPromptRead() - Read data from input h[0] with prompt to output h[1]
1.16 misho 188: *
1.1 misho 189: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
190: * @csPrompt = Prompt before input, may be NULL
191: * @psData = Readed data
192: * @dataLen = Length of data
193: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
194: */
1.36.2.6 misho 195: int ioPromptRead(int *h, const char *csPrompt,
196: char * __restrict psData, int dataLen);
1.1 misho 197: /*
1.17 misho 198: * ioPromptPassword() - Read password from input h[0] with prompt to output h[1]
1.16 misho 199: *
1.1 misho 200: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
201: * @csPrompt = Prompt before input, may be NULL
202: * @psPass = Readed password
203: * @passLen = Length of password
204: * @confirm = Confirm password, 0 - get password, !=0 Ask for confirmation
205: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
206: */
1.36.2.6 misho 207: int ioPromptPassword(int *h, const char *csPrompt,
208: char * __restrict psPass, int passLen, int confirm);
1.1 misho 209:
1.10 misho 210:
211: /*
1.17 misho 212: * ioMkDir() - Function for racursive directory creation and validation
1.16 misho 213: *
1.5 misho 214: * @csDir = Full directory path
215: * @mode = Mode for directory creation if missing dir
216: * return: -1 error, 0 directory path exist, >0 created missing dirs
217: */
218: int ioMkDir(const char *csDir, int mode);
219:
1.6 misho 220: /*
1.17 misho 221: * ioWatchDirLoop() - Function for watching changes in directory and fire callback
1.16 misho 222: *
1.6 misho 223: * @csDir = Full directory path
224: * @callback = Callback if raise event! nOp -1 delete, 0 change/move, 1 create
225: * return: -1 error, !=-1 ok, number of total signaled events
226: */
227: int ioWatchDirLoop(const char *csDir, int (*callback)(const char *csName, int nOp));
228:
1.5 misho 229:
1.24 misho 230: #ifdef AIO_OPS
231: /*
232: * io_aiobulk() - AIO bulk R/W function
233: *
234: * @mode = Bulk wait mode
235: * @acbs = List of aiocb structures
236: * @nacb = Number of aiocb in list
237: * @sig = Event for completed operations, may be =NULL
238: * return: -1 error or 0 ok
239: */
1.30 misho 240: int io_aiobulk(int mode, struct aiocb ** __restrict acbs, int nacb,
1.24 misho 241: struct sigevent *sig);
242: #endif
243: /*
244: * io_rreadv() - Raw VFS bulk read function
245: *
246: * @fd = File handle
247: * @bufs = Read buffers
248: * @nbufs = Number of read buffers
249: * @offset = Read from position, if -1 read nbytes from current position
250: * @update = Update file handle position !0
251: * return: -1 error or !=-1 readed bytes
252: */
253: int io_rreadv(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
254: int update);
255: /*
256: * io_rwritev() - Raw VFS bulk write function
257: *
258: * @fd = File handle
259: * @bufs = Write buffers
260: * @nbufs = Number of write buffers
261: * @offset = Write to position, if -1 write nbytes to current position
262: * @update = Update file handle position !0
263: * return: -1 error or !=-1 written bytes
264: */
265: int io_rwritev(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
266: int update);
1.5 misho 267: /*
1.17 misho 268: * io_rread() - Raw VFS read function
1.16 misho 269: *
1.5 misho 270: * @fd = File handle
271: * @buf = Read buffer
272: * @nbytes = Read buffer size
273: * @offset = Read from position, if -1 read nbytes from current position
274: * @update = Update file handle position !0
275: * return: -1 error or !=-1 readed bytes
276: */
1.30 misho 277: int io_rread(int fd, void * __restrict buf, size_t nbytes, off_t offset,
1.24 misho 278: int update);
1.5 misho 279: /*
1.17 misho 280: * io_rwrite() - Raw VFS write function
1.16 misho 281: *
1.5 misho 282: * @fd = File handle
283: * @buf = Write buffer
284: * @nbytes = Write bytes from buffer
285: * @offset = Write at position, if -1 write nbytes from current position
286: * @update = Update file handle position !0
1.24 misho 287: * return: -1 error or !=-1 written bytes
1.5 misho 288: */
1.30 misho 289: int io_rwrite(int fd, void * __restrict buf, size_t nbytes, off_t offset,
1.24 misho 290: int update);
1.5 misho 291:
292: /* Disk I/O helper macros */
293: #define io_read(f, b, n) io_rread(f, b, n, -1, 1)
294: #define io_write(f, b, n) io_rwrite(f, b, n, -1, 1)
295:
296:
1.7 misho 297: /* Crypto framework */
298:
299: /*
1.17 misho 300: * ioCipher() - Cipher wrapper for all supported crypto algorythms
1.16 misho 301: *
1.7 misho 302: * @pInput = input buffer
303: * @inLen = input buffer len
1.29 misho 304: * @ppOutput = output allocated buffe, must be e_free after use
1.7 misho 305: * @Cipher = cipher engine, like EVP_bf_cbc() or etc...
306: * @pKey = key
307: * @pIV = IV, salt (8 bytes)
308: * @nMode = Mode 0 - decrypting or 1 - encrypting
309: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
310: */
311: int ioCipher(unsigned char *pInput, int inLen, unsigned char **ppOutput, const EVP_CIPHER *Cipher,
312: unsigned char *pKey, unsigned char *pIV, int nMode);
313:
314: /*
1.17 misho 315: * io_Blowfish() - Blowfish cipher algorythm, work with ASCII hex strings
1.16 misho 316: *
1.7 misho 317: * @pInput = input buffer
318: * @inLen = input buffer len
1.29 misho 319: * @ppOutput = output allocated buffe, must be e_free after use
1.7 misho 320: * @pKey = key
321: * @pIV = IV, salt (8 bytes)
322: * @nMode = Mode 0 - decrypting or 1 - encrypting
323: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
324: */
1.8 misho 325: int io_Blowfish(unsigned char *pInput, int inLen, unsigned char **ppOutput,
326: unsigned char *pKey, unsigned char *pIV, int nMode);
1.12 misho 327: /*
1.17 misho 328: * io_ctr_AES() - Encrypt/Decrypt stream cipher CTR_AES
1.16 misho 329: *
1.12 misho 330: * @pInput = Input buffer with ASCII
331: * @inLen = Input buffer data length
1.29 misho 332: * @ppOutput = Output buffer with cipher data, must be e_free after use
1.12 misho 333: * @pKey = Key
334: * @IV = IVector/Nonce/Counter, Warning: IV must be variable, because we write there!!!
335: * return: -1 error or >-1 how many cipher blocks proceeded
336: */
337: int io_ctr_AES(unsigned char *pInput, int inLen, unsigned char **ppOutput,
338: unsigned char *pKey, unsigned char IV[AES_BLOCK_SIZE]);
339:
340:
341: /*
1.17 misho 342: * ioAllocPTY() - Allocate new PTY and TTY
1.16 misho 343: *
1.12 misho 344: * @ptyfd = master fd, pty
345: * @ttyfd = slave fd, tty
346: * @name = tty device name if not null
347: * @namesiz = name length, must be above 63 bytes.
348: * @term = termios for terminal
349: * @winz = winsize for terminal
350: * return: -1 error or 0 ok
351: */
1.30 misho 352: int ioAllocPTY(int *ptyfd, int *ttyfd, char * __restrict name, int namesiz,
1.12 misho 353: struct termios * __restrict term, struct winsize * __restrict winz);
354: /*
1.17 misho 355: * ioFreePTY() - Release PTY and TTY device
1.16 misho 356: *
1.12 misho 357: * @ptyfd = master fd, pty (==-1 skip closing pty)
358: * @ttyname = tty filename
359: * return: none
360: */
1.30 misho 361: void ioFreePTY(int ptyfd, const char *ttyname);
1.12 misho 362: /*
1.17 misho 363: * ioChgWinPTY() - Change window size of PTY
1.16 misho 364: *
1.12 misho 365: * @ptyfd = master fd, pty
366: * @row = row
367: * @col = col
368: * @xpxl = x pixels
369: * @ypxl = y pixels
370: * return: -1 error or 0 ok
371: */
1.30 misho 372: int ioChgWinPTY(int ptyfd, unsigned short row, unsigned short col,
1.12 misho 373: unsigned short xpxl, unsigned short ypxl);
374: /*
1.17 misho 375: * ioSetOwnerTTY() - Set owner to TTY
1.16 misho 376: *
1.12 misho 377: * @ttyname = tty filename
378: * @UID = uid
379: * @GID = gid
380: * return: -1 error or 0 ok
381: */
382: int ioSetOwnerTTY(const char *ttyname, uid_t UID, gid_t GID);
383: /*
1.17 misho 384: * ioSetSidTTY() - Makes the process's controlling TTY and sets it to sane modes.
1.16 misho 385: *
1.12 misho 386: * @ttyfd = slave fd, tty
387: * @ttyname = tty filename
388: * return: -1 error or 0 ok
389: */
390: int ioSetSidTTY(int *ttyfd, const char *ttyname);
391: /*
1.17 misho 392: * ioSetRAWMode() - Enter into RAW mode
1.16 misho 393: *
1.12 misho 394: * @fd = tty fd
395: * @otio = saved old termios for later restore if !=NULL
396: * return: -1 error or 0 ok
397: */
1.30 misho 398: int ioSetRAWMode(int fd, struct termios *otio);
1.12 misho 399: /*
1.17 misho 400: * ioRestoreMode() - Restore termios to tty fd
1.16 misho 401: *
1.12 misho 402: * @fd = tty fd
403: * @tio = termios structure for restore
404: * return: -1 error or 0 ok
405: */
1.30 misho 406: int ioRestoreMode(int fd, struct termios tio);
1.12 misho 407: /*
1.17 misho 408: * ioForkPTY() - Fork new process with session leader and new TTY
1.16 misho 409: *
1.12 misho 410: * @ptyfd = master fd, pty
411: * @name = tty device name if not null
412: * @namesiz = name length, must be above 63 bytes.
413: * @term = termios for terminal
414: * @winz = winsize for terminal
415: * @otio = old termios structure for restore
416: * return: -1 error, 0 child process or >0 parent: pid of child
417: */
418: pid_t ioForkPTY(int *ptyfd, char * __restrict name, int namesiz, struct termios * __restrict term,
419: struct winsize * __restrict winz, struct termios * __restrict otio);
420:
421: /*
1.17 misho 422: * ioCreatePIDFile() - Create PID file
1.16 misho 423: *
1.12 misho 424: * @csName = PID filename
425: * @ifExists = !=0 if filename exists return error
426: * return: -1 error or 0 ok
427: */
1.30 misho 428: int ioCreatePIDFile(const char *csName, int ifExists);
1.7 misho 429:
1.13 misho 430: /*
1.17 misho 431: * ioSendFile() - AITNET sendfile() userland implementation, not dependant from OS
1.16 misho 432: *
1.13 misho 433: * @s = socket
434: * @csFile = file for send
435: * @sendLen = bytes to send, if 0 send all data
436: * @offset = start file offset
437: * @sndbuf = SO_SNDBUF value, if 0 use default
438: * return: 0 error, >0 ok, sended bytes
439: */
440: size_t ioSendFile(int s, const char *csFile, size_t sendLen, off_t offset, int sndbuf);
441: /*
1.17 misho 442: * ioRecvFile() - Receive file from socket, fastest (zero-copy) way
1.16 misho 443: *
1.13 misho 444: * @s = socket
445: * @csFile = file for receive
446: * @recvLen = receive bytes
447: * @over = overwrite file if exists with mode like 0644
448: * @rcvbuf = SO_RCVBUF value, if 0 use default
449: * return: 0 error, >0 ok, received bytes
450: */
451: size_t ioRecvFile(int s, const char *csFile, size_t recvLen, int over, int rcvbuf);
452:
1.31 misho 453: /*
454: * ioRealFileName() - Get real file name
455: *
456: * @fname = filename
457: * return: =NULL error or !=NULL real filename, should be free with e_free()
458: */
459: char *ioRealFileName(const char *fname);
1.7 misho 460:
1.14 misho 461: /* Buffered file access over memory block */
462:
463: /*
1.17 misho 464: * io_fmemopen() - File buffered stream operations over memory block
1.14 misho 465: *
466: * @base = Base address of memory block, if =NULL Infinit length(auto-grow)
467: * @basesize = Size of memory block
468: * return: NULL error or !=NULL Opened file resource
469: */
470: FILE *io_fmemopen(void ** __restrict base, off_t basesize);
471: /*
1.17 misho 472: * io_fmapopen() - File buffered stream operations over MMAP block
1.14 misho 473: *
474: * @csFile = Filename for MMAP, if =NULL private MMAP block
475: * @mode = File open mode
476: * @perm = If file not exists will be created with this access permissions
477: * @prot = MMAP protection
478: * @flags = MMAP mode flags
479: * @offset = Map from file offset, if csFile==NULL then this is size of MMAP private block
480: * return: NULL error or !=NULL Opened file resource
481: */
482: FILE *io_fmapopen(const char *csFile, int mode, int perm, int prot, int flags, off_t offset);
483: /*
1.17 misho 484: * io_fd2buf() - Convert open file handle to buffered file I/O
1.14 misho 485: *
486: * @fd = File handle
487: * @mode = Permissions for new buffered file I/O
488: * return: NULL error or open buffered file
489: */
1.30 misho 490: FILE *io_fd2buf(int fd, const char *mode);
1.14 misho 491: /*
1.17 misho 492: * io_dumbFile() - Create empry or dumb file with fixed size
1.14 misho 493: *
494: * @csFile = Filename for create
495: * @mode = File access permissions
496: * @size = File size
497: * return: -1 error or open file handle
498: */
499: int io_dumbFile(const char *csFile, int mode, off_t size);
500:
501:
1.32 misho 502: /*
503: * io_get1stiface() - Get first interface of host
504: *
505: * @szIface = interface string buffer
506: * @iflen = size of interface buffer
507: * return: -1 error or 0 ok
508: */
509: int io_get1stiface(char *szIface, int iflen);
510: /*
511: * io_etherOpen() - Open BPF interface to device
512: *
513: * @csIface = interface name
514: * @flags = open flags
515: * @whdr = with complete headers
1.33 misho 516: * @wdlt = with data link type
1.32 misho 517: * @buflen = buffer length
518: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
519: * return: -1 error or >-1 bpf handle
520: */
1.33 misho 521: int io_etherOpen(const char *csIface, int flags, int whdr, int wdlt,
1.32 misho 522: unsigned int *buflen, void **zcbuf);
523: /*
524: * io_etherClose() - Close BPF interface
525: *
526: * @eth = bpf handle
527: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
528: * return: none
529: */
530: void io_etherClose(int eth, void **zcbuf);
531:
532: /*
1.36 misho 533: * io_etherFilter() - BPF filter routine
534: *
535: * @eth = bpf handle
536: * @io = filter direction
537: * (IO_ETHER_FILTER_PROMISC|IO_ETHER_FILTER_NOTREAD|IO_ETHER_FILTER_READ|IO_ETHER_FILTER_WRITE)
538: * @insn = BPF filter instruction array
539: * @insnlen = Length of BPF filter instruction array
540: * return: -1 error or 0 ok
541: */
542: int io_etherFilter(int eth, int io, struct bpf_insn * __restrict insn, size_t insnlen);
543:
544: /*
1.32 misho 545: * io_etherSend() - Send packet to bpf
546: *
547: * @eth = bpf handle
548: * @buf = buffer
549: * @buflen = buffer length
550: * return: -1 error or !=-1 written bytes
551: */
552: ssize_t io_etherSend(int eth, const void *buf, size_t buflen);
553: /*
554: * io_etherRecv() - Receive packet from bpf
555: *
556: * @eth = bpf handle
557: * @buf = buffer
558: * @buflen = buffer length
559: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
560: * return: -1 error or !=-1 readed bytes
561: */
562: ssize_t io_etherRecv(int eth, void * __restrict buf,
563: size_t buflen, void * __restrict zcbuf);
564:
565:
1.1 misho 566: #endif
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