1: /*************************************************************************
2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
6: * $Id: aitio.h,v 1.38.10.9 2013/12/08 20:43:22 misho Exp $
7: *
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:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
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: */
46: #ifndef __AITIO_H
47: #define __AITIO_H
48:
49:
50: #define COMPAT_43TTY
51:
52: #include <assert.h>
53: #include <syslog.h>
54: #include <openssl/evp.h>
55: #include <openssl/aes.h>
56: #include <sys/tty.h>
57: #include <sys/ioctl_compat.h>
58: #include <sys/socket.h>
59: #include <sys/un.h>
60: #include <sys/uio.h>
61: #include <net/if_dl.h>
62: #include <net/bpf.h>
63: #include <netinet/in.h>
64: #include <elwix.h>
65: #include <aitsched.h>
66:
67:
68: #ifndef STRSIZ
69: #define STRSIZ 256
70: #endif
71:
72: #define IO_SOCK_ROLE_CLIENT 0
73: #define IO_SOCK_ROLE_SERVER 1
74:
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:
80:
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];
89: char cli_cmdline[PATH_MAX];
90: pid_t cli_pid;
91:
92: sched_task_func_t cli_func;
93:
94: ait_val_t cli_buf[2];
95:
96: TAILQ_ENTRY(tagCliSock) cli_node;
97: };
98:
99: typedef struct {
100: int sock_role;
101: int sock_backq;
102: int sock_type;
103: int sock_proto;
104: int sock_fd;
105: struct timespec sock_timeout;
106: sockaddr_t sock_addr;
107: sockaddr_t sock_peer;
108:
109: ait_val_t sock_buf;
110:
111: volatile intptr_t sock_kill;
112: sched_root_task_t *sock_root;
113:
114: pthread_mutex_t sock_mtx;
115: TAILQ_HEAD(, tagCliSock) sock_cli;
116: } sock_t;
117:
118: typedef struct {
119: unsigned int prog_inin; /* init progs */
120: unsigned int prog_maxn; /* max progs */
121: unsigned int prog_cnum; /* current progs */
122: char prog_name[PATH_MAX];
123:
124: pthread_mutex_t prog_mtx;
125: array_t *prog_fds;
126: unsigned int *prog_used;
127: } prog_t;
128:
129:
130: // io_GetErrno() Get error code of last operation
131: int io_GetErrno();
132: // io_GetError() Get error text of last operation
133: const char *io_GetError();
134:
135:
136: /*
137: * io_progInit() - Init program pool
138: *
139: * @progName = program name for execution
140: * @initNum = initial started programs
141: * @maxNum = maximum started programs
142: * return: NULL error or !=NULL allocated pool (must destroied with io_progDestroy())
143: */
144: prog_t *io_progInit(const char *progName,
145: unsigned int initNum, unsigned int maxNum);
146: /*
147: * io_progOpen() - Execute number of program(s)
148: *
149: * @prg = program pool
150: * @execNum = execute program(s) (0 max)
151: * return: 0 error, >0 executed programs and abs(<0) executed programs with logged error
152: */
153: int io_progOpen(prog_t * __restrict prg, unsigned int execNum);
154: /*
155: * io_progGrow() - Execute to number of programs in pool
156: *
157: * @prg = program pool
158: * @toNum = execute to number of programs (0 max)
159: * return: 0 error, >0 executed programs and abs(<0) executed programs with logged error
160: */
161: int io_progGrow(prog_t * __restrict prg, unsigned int toNum);
162: /*
163: * io_progVacuum() - Vacuum pool to running number of programs
164: *
165: * @prg = program pool
166: * @toNum = vacuum to number of programs (0 to init number)
167: * return: 0 error or >0 closed programs
168: */
169: int io_progVacuum(prog_t * __restrict prg, unsigned int toNum);
170: /*
171: * io_progCloseAt() - Close program at pool of certain position
172: *
173: * @prg = program pool
174: * @idx = index at pool
175: * return: 0 error or !=0 closed program
176: */
177: int io_progCloseAt(prog_t * __restrict prg, unsigned int idx);
178: /*
179: * io_progClose() - Close all programs in pool
180: *
181: * @prg = program pool
182: * @closeNum = close program(s) (0 all)
183: * return: 0 error, >0 closed programs
184: */
185: int io_progClose(prog_t * __restrict prg, unsigned int closeNum);
186: /*
187: * io_progDestroy() - Destroy entire program pool
188: *
189: * @pprg = program pool
190: * return: none
191: */
192: void io_progDestroy(prog_t ** __restrict pprg);
193:
194: /*
195: * io_progCheck() - Check exit status of program pool
196: *
197: * @prg = program pool
198: * return: -1 error or >-1 exited programs
199: */
200: int io_progCheck(prog_t * __restrict prg);
201:
202: /*
203: * io_progAttach() - Attach to open program
204: *
205: * @prg = program pool
206: * return: NULL error or !=NULL attached program handle
207: */
208: #ifdef POPEN_STREAM
209: FILE *io_progAttach(prog_t * __restrict prg);
210: #else
211: int io_progAttach(prog_t * __restrict prg);
212: #endif
213: /*
214: * io_progDetach() - Detch from open program
215: *
216: * @prg= program pool
217: * @pfd = attached program handle
218: * return: none
219: */
220: #ifdef POPEN_STREAM
221: void io_progDetach(prog_t * __restrict prg, FILE *pfd);
222: #else
223: void io_progDetach(prog_t * __restrict prg, int pfd);
224: #endif
225:
226:
227: /*
228: * ioInitSocket() - Init socket and allocate resources
229: *
230: * @role = Socket role
231: * @type = Socket type
232: * @proto = Socket protocol
233: * @addr = Bind to address
234: * @port = Bind to port
235: * @buflen = Socket buffer, optional if =0 == BUFSIZ
236: * return: NULL error or !=NULL created socket
237: */
238: sock_t *ioInitSocket(int role, int type, int proto,
239: const char *addr, unsigned short port, size_t buflen);
240: /*
241: * ioCloseSocket() - Close socket and free resources
242: *
243: * @s = Socket
244: * return: none
245: */
246: void ioCloseSocket(sock_t ** __restrict s);
247: #define ioKillSocket(x) (assert((x)), (x)->sock_kill = 1)
248: /*
249: * ioCloseClient() - Close client socket
250: *
251: * @c = Client socket
252: * return: 0 ok or !=0 error
253: */
254: int ioCloseClient(sock_cli_t * __restrict c);
255: /*
256: * ioUpSocket() - Setup socket for use
257: *
258: * @s = Socket
259: * @arg = Server role = listen backlog queue and Client role = peer address
260: * @timeout = Socket timeout in ms (default -1 infinit)
261: * return: -1 error or 0 ok
262: */
263: int ioUpSocket(sock_t * __restrict s, void *arg, int timeout);
264: /*
265: * ioUpdTimerSocket() - Update timeout of socket
266: *
267: * @c = Client socket
268: * return: none
269: */
270: void ioUpdTimerSocket(sock_cli_t * __restrict c);
271: /*
272: * ioLoopSocket() - Start socket scheduler
273: *
274: * @s = Socket
275: * @rcb = Read callback
276: * return: -1 error or return result from scheduler
277: */
278: int ioLoopSocket(sock_t * __restrict s, sched_task_func_t rcb);
279: /*
280: * ioBridgeProg2Socket() - Start socket scheduler and bridge program to socket
281: *
282: * @s = Socket
283: * @prgname = Program name
284: * return: 0 ok or !=0 error
285: */
286: int ioBridgeProg2Socket(sock_t * __restrict s, const char *prgname);
287:
288:
289: /*
290: * ioPromptRead() - Read data from input h[0] with prompt to output h[1]
291: *
292: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
293: * @csPrompt = Prompt before input, may be NULL
294: * @psData = Readed data
295: * @dataLen = Length of data
296: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
297: */
298: int ioPromptRead(int *h, const char *csPrompt,
299: char * __restrict psData, int dataLen);
300: /*
301: * ioPromptPassword() - Read password from input h[0] with prompt to output h[1]
302: *
303: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
304: * @csPrompt = Prompt before input, may be NULL
305: * @psPass = Readed password
306: * @passLen = Length of password
307: * @confirm = Confirm password, 0 - get password, !=0 Ask for confirmation
308: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
309: */
310: int ioPromptPassword(int *h, const char *csPrompt,
311: char * __restrict psPass, int passLen, int confirm);
312:
313:
314: /*
315: * ioMkDir() - Function for racursive directory creation and validation
316: *
317: * @csDir = Full directory path
318: * @mode = Mode for directory creation if missing dir
319: * return: -1 error, 0 directory path exist, >0 created missing dirs
320: */
321: int ioMkDir(const char *csDir, int mode);
322:
323: /*
324: * ioWatchDirLoop() - Function for watching changes in directory and fire callback
325: *
326: * @csDir = Full directory path
327: * @callback = Callback if raise event! nOp -1 delete, 0 change/move, 1 create
328: * return: -1 error, !=-1 ok, number of total signaled events
329: */
330: int ioWatchDirLoop(const char *csDir, int (*callback)(const char *csName, int nOp));
331:
332:
333: #ifdef AIO_OPS
334: /*
335: * io_aiobulk() - AIO bulk R/W function
336: *
337: * @mode = Bulk wait mode
338: * @acbs = List of aiocb structures
339: * @nacb = Number of aiocb in list
340: * @sig = Event for completed operations, may be =NULL
341: * return: -1 error or 0 ok
342: */
343: int io_aiobulk(int mode, struct aiocb ** __restrict acbs, int nacb,
344: struct sigevent *sig);
345: #endif
346: /*
347: * io_rreadv() - Raw VFS bulk read function
348: *
349: * @fd = File handle
350: * @bufs = Read buffers
351: * @nbufs = Number of read buffers
352: * @offset = Read from position, if -1 read nbytes from current position
353: * @update = Update file handle position !0
354: * return: -1 error or !=-1 readed bytes
355: */
356: int io_rreadv(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
357: int update);
358: /*
359: * io_rwritev() - Raw VFS bulk write function
360: *
361: * @fd = File handle
362: * @bufs = Write buffers
363: * @nbufs = Number of write buffers
364: * @offset = Write to position, if -1 write nbytes to current position
365: * @update = Update file handle position !0
366: * return: -1 error or !=-1 written bytes
367: */
368: int io_rwritev(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
369: int update);
370: /*
371: * io_rread() - Raw VFS read function
372: *
373: * @fd = File handle
374: * @buf = Read buffer
375: * @nbytes = Read buffer size
376: * @offset = Read from position, if -1 read nbytes from current position
377: * @update = Update file handle position !0
378: * return: -1 error or !=-1 readed bytes
379: */
380: int io_rread(int fd, void * __restrict buf, size_t nbytes, off_t offset,
381: int update);
382: /*
383: * io_rwrite() - Raw VFS write function
384: *
385: * @fd = File handle
386: * @buf = Write buffer
387: * @nbytes = Write bytes from buffer
388: * @offset = Write at position, if -1 write nbytes from current position
389: * @update = Update file handle position !0
390: * return: -1 error or !=-1 written bytes
391: */
392: int io_rwrite(int fd, void * __restrict buf, size_t nbytes, off_t offset,
393: int update);
394:
395: /* Disk I/O helper macros */
396: #define io_read(f, b, n) io_rread(f, b, n, -1, 1)
397: #define io_write(f, b, n) io_rwrite(f, b, n, -1, 1)
398:
399:
400: /* Crypto framework */
401:
402: /*
403: * ioCipher() - Cipher wrapper for all supported crypto algorythms
404: *
405: * @pInput = input buffer
406: * @inLen = input buffer len
407: * @ppOutput = output allocated buffe, must be e_free after use
408: * @Cipher = cipher engine, like EVP_bf_cbc() or etc...
409: * @pKey = key
410: * @pIV = IV, salt (8 bytes)
411: * @nMode = Mode 0 - decrypting or 1 - encrypting
412: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
413: */
414: int ioCipher(unsigned char *pInput, int inLen, unsigned char **ppOutput, const EVP_CIPHER *Cipher,
415: unsigned char *pKey, unsigned char *pIV, int nMode);
416:
417: /*
418: * io_Blowfish() - Blowfish cipher algorythm, work with ASCII hex strings
419: *
420: * @pInput = input buffer
421: * @inLen = input buffer len
422: * @ppOutput = output allocated buffe, must be e_free after use
423: * @pKey = key
424: * @pIV = IV, salt (8 bytes)
425: * @nMode = Mode 0 - decrypting or 1 - encrypting
426: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
427: */
428: int io_Blowfish(unsigned char *pInput, int inLen, unsigned char **ppOutput,
429: unsigned char *pKey, unsigned char *pIV, int nMode);
430: /*
431: * io_ctr_AES() - Encrypt/Decrypt stream cipher CTR_AES
432: *
433: * @pInput = Input buffer with ASCII
434: * @inLen = Input buffer data length
435: * @ppOutput = Output buffer with cipher data, must be e_free after use
436: * @pKey = Key
437: * @IV = IVector/Nonce/Counter, Warning: IV must be variable, because we write there!!!
438: * return: -1 error or >-1 how many cipher blocks proceeded
439: */
440: int io_ctr_AES(unsigned char *pInput, int inLen, unsigned char **ppOutput,
441: unsigned char *pKey, unsigned char IV[AES_BLOCK_SIZE]);
442:
443:
444: /*
445: * ioAllocPTY() - Allocate new PTY and TTY
446: *
447: * @ptyfd = master fd, pty
448: * @ttyfd = slave fd, tty
449: * @name = tty device name if not null
450: * @namesiz = name length, must be above 63 bytes.
451: * @term = termios for terminal
452: * @winz = winsize for terminal
453: * return: -1 error or 0 ok
454: */
455: int ioAllocPTY(int *ptyfd, int *ttyfd, char * __restrict name, int namesiz,
456: struct termios * __restrict term, struct winsize * __restrict winz);
457: /*
458: * ioFreePTY() - Release PTY and TTY device
459: *
460: * @ptyfd = master fd, pty (==-1 skip closing pty)
461: * @ttyname = tty filename
462: * return: none
463: */
464: void ioFreePTY(int ptyfd, const char *ttyname);
465: /*
466: * ioChgWinPTY() - Change window size of PTY
467: *
468: * @ptyfd = master fd, pty
469: * @row = row
470: * @col = col
471: * @xpxl = x pixels
472: * @ypxl = y pixels
473: * return: -1 error or 0 ok
474: */
475: int ioChgWinPTY(int ptyfd, unsigned short row, unsigned short col,
476: unsigned short xpxl, unsigned short ypxl);
477: /*
478: * ioSetOwnerTTY() - Set owner to TTY
479: *
480: * @ttyname = tty filename
481: * @UID = uid
482: * @GID = gid
483: * return: -1 error or 0 ok
484: */
485: int ioSetOwnerTTY(const char *ttyname, uid_t UID, gid_t GID);
486: /*
487: * ioSetSidTTY() - Makes the process's controlling TTY and sets it to sane modes.
488: *
489: * @ttyfd = slave fd, tty
490: * @ttyname = tty filename
491: * return: -1 error or 0 ok
492: */
493: int ioSetSidTTY(int *ttyfd, const char *ttyname);
494: /*
495: * ioSetRAWMode() - Enter into RAW mode
496: *
497: * @fd = tty fd
498: * @otio = saved old termios for later restore if !=NULL
499: * return: -1 error or 0 ok
500: */
501: int ioSetRAWMode(int fd, struct termios *otio);
502: /*
503: * ioRestoreMode() - Restore termios to tty fd
504: *
505: * @fd = tty fd
506: * @tio = termios structure for restore
507: * return: -1 error or 0 ok
508: */
509: int ioRestoreMode(int fd, struct termios tio);
510: /*
511: * ioForkPTY() - Fork new process with session leader and new TTY
512: *
513: * @ptyfd = master fd, pty
514: * @name = tty device name if not null
515: * @namesiz = name length, must be above 63 bytes.
516: * @term = termios for terminal
517: * @winz = winsize for terminal
518: * @otio = old termios structure for restore
519: * return: -1 error, 0 child process or >0 parent: pid of child
520: */
521: pid_t ioForkPTY(int *ptyfd, char * __restrict name, int namesiz, struct termios * __restrict term,
522: struct winsize * __restrict winz, struct termios * __restrict otio);
523:
524: /*
525: * ioCreatePIDFile() - Create PID file
526: *
527: * @csName = PID filename
528: * @ifExists = !=0 if filename exists return error
529: * return: -1 error or 0 ok
530: */
531: int ioCreatePIDFile(const char *csName, int ifExists);
532:
533: /*
534: * ioSendFile() - AITNET sendfile() userland implementation, not dependant from OS
535: *
536: * @s = socket
537: * @csFile = file for send
538: * @sendLen = bytes to send, if 0 send all data
539: * @offset = start file offset
540: * @sndbuf = SO_SNDBUF value, if 0 use default
541: * return: 0 error, >0 ok, sended bytes
542: */
543: size_t ioSendFile(int s, const char *csFile, size_t sendLen, off_t offset, int sndbuf);
544: /*
545: * ioRecvFile() - Receive file from socket, fastest (zero-copy) way
546: *
547: * @s = socket
548: * @csFile = file for receive
549: * @recvLen = receive bytes
550: * @over = overwrite file if exists with mode like 0644
551: * @rcvbuf = SO_RCVBUF value, if 0 use default
552: * return: 0 error, >0 ok, received bytes
553: */
554: size_t ioRecvFile(int s, const char *csFile, size_t recvLen, int over, int rcvbuf);
555:
556: /*
557: * ioRealFileName() - Get real file name
558: *
559: * @fname = filename
560: * return: =NULL error or !=NULL real filename, should be free with e_free()
561: */
562: char *ioRealFileName(const char *fname);
563:
564: /* Buffered file access over memory block */
565:
566: /*
567: * io_fmemopen() - File buffered stream operations over memory block
568: *
569: * @base = Base address of memory block, if =NULL Infinit length(auto-grow)
570: * @basesize = Size of memory block
571: * return: NULL error or !=NULL Opened file resource
572: */
573: FILE *io_fmemopen(void ** __restrict base, off_t basesize);
574: /*
575: * io_fmapopen() - File buffered stream operations over MMAP block
576: *
577: * @csFile = Filename for MMAP, if =NULL private MMAP block
578: * @mode = File open mode
579: * @perm = If file not exists will be created with this access permissions
580: * @prot = MMAP protection
581: * @flags = MMAP mode flags
582: * @offset = Map from file offset, if csFile==NULL then this is size of MMAP private block
583: * return: NULL error or !=NULL Opened file resource
584: */
585: FILE *io_fmapopen(const char *csFile, int mode, int perm, int prot, int flags, off_t offset);
586: /*
587: * io_fd2buf() - Convert open file handle to buffered file I/O
588: *
589: * @fd = File handle
590: * @mode = Permissions for new buffered file I/O
591: * return: NULL error or open buffered file
592: */
593: FILE *io_fd2buf(int fd, const char *mode);
594: /*
595: * io_dumbFile() - Create empry or dumb file with fixed size
596: *
597: * @csFile = Filename for create
598: * @mode = File access permissions
599: * @size = File size
600: * return: -1 error or open file handle
601: */
602: int io_dumbFile(const char *csFile, int mode, off_t size);
603:
604:
605: /*
606: * io_get1stiface() - Get first interface of host
607: *
608: * @szIface = interface string buffer
609: * @iflen = size of interface buffer
610: * return: -1 error or 0 ok
611: */
612: int io_get1stiface(char *szIface, int iflen);
613: /*
614: * io_getmaciface() - Get MAC address from interface name
615: *
616: * @csIface = interface name
617: * @ea = ethernet address
618: * return: -1 error, 0 ok or 1 not found
619: */
620: int io_getmaciface(const char *csIface, ether_addr_t * __restrict ea);
621: /*
622: * io_etherOpen() - Open BPF interface to device
623: *
624: * @csIface = interface name
625: * @flags = open flags
626: * @whdr = with complete headers
627: * @wdlt = with data link type
628: * @buflen = buffer length
629: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
630: * return: -1 error or >-1 bpf handle
631: */
632: int io_etherOpen(const char *csIface, int flags, int whdr, int wdlt,
633: unsigned int *buflen, void **zcbuf);
634: /*
635: * io_etherClose() - Close BPF interface
636: *
637: * @eth = bpf handle
638: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
639: * return: none
640: */
641: void io_etherClose(int eth, void **zcbuf);
642:
643: /*
644: * io_etherFilter() - BPF filter routine
645: *
646: * @eth = bpf handle
647: * @io = filter direction
648: * (IO_ETHER_FILTER_PROMISC|IO_ETHER_FILTER_NOTREAD|IO_ETHER_FILTER_READ|IO_ETHER_FILTER_WRITE)
649: * @insn = BPF filter instruction array
650: * @insnlen = Length of BPF filter instruction array
651: * return: -1 error or 0 ok
652: */
653: int io_etherFilter(int eth, int io, struct bpf_insn * __restrict insn, size_t insnlen);
654:
655: /*
656: * io_etherSend() - Send packet to bpf
657: *
658: * @eth = bpf handle
659: * @buf = buffer
660: * @buflen = buffer length
661: * return: -1 error or !=-1 written bytes
662: */
663: ssize_t io_etherSend(int eth, const void *buf, size_t buflen);
664: /*
665: * io_etherRecv() - Receive packet from bpf
666: *
667: * @eth = bpf handle
668: * @buf = buffer
669: * @buflen = buffer length
670: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
671: * return: -1 error or !=-1 readed bytes
672: */
673: ssize_t io_etherRecv(int eth, void * __restrict buf,
674: size_t buflen, void * __restrict zcbuf);
675:
676:
677: #endif
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