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 1.39 2013/12/15 22:57:20 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 {
82: unsigned int prog_inin; /* init progs */
83: unsigned int prog_maxn; /* max progs */
84: unsigned int prog_cnum; /* current progs */
85: char prog_name[PATH_MAX];
86:
87: pthread_mutex_t prog_mtx;
88: array_t *prog_fds;
89: unsigned int *prog_used;
90: } prog_t;
91:
92: typedef struct tagCliSock sock_cli_t;
93: typedef void *(*sock_cb_t)(sock_cli_t*);
94: struct tagCliSock {
95: void *cli_parent;
96: int cli_fd;
97: intptr_t cli_pty;
98: sockaddr_t cli_addr;
99: char cli_name[64];
100: char cli_cmdline[PATH_MAX];
101: pid_t cli_pid;
102:
103: sched_task_func_t cli_func;
104:
105: ait_val_t cli_buf[2];
106:
107: TAILQ_ENTRY(tagCliSock) cli_node;
108: };
109:
110: typedef struct {
111: int sock_role;
112: int sock_backq;
113: int sock_type;
114: int sock_proto;
115: int sock_fd;
116: struct timespec sock_timeout;
117: sockaddr_t sock_addr;
118: sockaddr_t sock_peer;
119:
120: ait_val_t sock_buf;
121: prog_t *sock_prog;
122:
123: volatile intptr_t sock_kill;
124: sched_root_task_t *sock_root;
125:
126: pthread_mutex_t sock_mtx;
127: TAILQ_HEAD(, tagCliSock) sock_cli;
128: } sock_t;
129:
130:
131: // io_GetErrno() Get error code of last operation
132: int io_GetErrno();
133: // io_GetError() Get error text of last operation
134: const char *io_GetError();
135:
136:
137: /*
138: * io_progInit() - Init program pool
139: *
140: * @progName = program name for execution
141: * @initNum = initial started programs
142: * @maxNum = maximum started programs
143: * return: NULL error or !=NULL allocated pool (must destroied with io_progDestroy())
144: */
145: prog_t *io_progInit(const char *progName,
146: unsigned int initNum, unsigned int maxNum);
147: /*
148: * io_progOpen() - Execute number of program(s)
149: *
150: * @prg = program pool
151: * @execNum = execute program(s) (0 max)
152: * return: -1 error, >0 executed programs
153: */
154: int io_progOpen(prog_t * __restrict prg, unsigned int execNum);
155: /*
156: * io_progOpen2() - Start program from pool on first unused slot
157: *
158: * @prg = program pool
159: * return: -1 error, >-1 reside at slot
160: */
161: int io_progOpen2(prog_t * __restrict prg);
162: /*
163: * io_progGrow() - Execute to number of programs in pool
164: *
165: * @prg = program pool
166: * @toNum = execute to number of programs (0 max)
167: * return: 0 error or nothing to do,
168: * >0 executed programs and abs(<0) executed programs with logged error
169: */
170: int io_progGrow(prog_t * __restrict prg, unsigned int toNum);
171: /*
172: * io_progVacuum() - Vacuum pool to running number of programs
173: *
174: * @prg = program pool
175: * @toNum = vacuum to number of programs (0 to init number)
176: * return: 0 error or >0 closed programs
177: */
178: int io_progVacuum(prog_t * __restrict prg, unsigned int toNum);
179: /*
180: * io_progCloseAt() - Close program at pool of certain position
181: *
182: * @prg = program pool
183: * @idx = index at pool
184: * return: 0 error or !=0 closed program
185: */
186: int io_progCloseAt(prog_t * __restrict prg, unsigned int idx);
187: /*
188: * io_progCloseOf() - Close program at pool with certain handle
189: *
190: * @prg = program pool
191: * @h = handle of program
192: * return: 0 error, >0 closed programs
193: */
194: #ifdef POPEN_STREAM
195: int io_progCloseOf(prog_t * __restrict prg, FILE *h);
196: #else
197: int io_progCloseOf(prog_t * __restrict prg, int h);
198: #endif
199: /*
200: * io_progClose() - Close all programs in pool
201: *
202: * @prg = program pool
203: * @closeNum = close program(s) (0 all)
204: * return: 0 error, >0 closed programs
205: */
206: int io_progClose(prog_t * __restrict prg, unsigned int closeNum);
207: /*
208: * io_progDestroy() - Destroy entire program pool
209: *
210: * @pprg = program pool
211: * return: none
212: */
213: void io_progDestroy(prog_t ** __restrict pprg);
214:
215: /*
216: * io_progCheck() - Check exit status of program pool
217: *
218: * @prg = program pool
219: * @re = resurrect program to init number
220: * return: -1 error or >-1 exited programs
221: */
222: int io_progCheck(prog_t * __restrict prg, int re);
223:
224: /*
225: * io_progAttach() - Attach to open program
226: *
227: * @prg = program pool
228: * @newOne = Execute new one program after attach
229: * return: NULL error or !=NULL attached program handle
230: */
231: #ifdef POPEN_STREAM
232: FILE *io_progAttach(prog_t * __restrict prg, int newOne);
233: #else
234: int io_progAttach(prog_t * __restrict prg, int newOne);
235: #endif
236: /*
237: * io_progDetach() - Detch from open program
238: *
239: * @prg= program pool
240: * @pfd = attached program handle
241: * return: none
242: */
243: #ifdef POPEN_STREAM
244: void io_progDetach(prog_t * __restrict prg, FILE *pfd);
245: #else
246: void io_progDetach(prog_t * __restrict prg, int pfd);
247: #endif
248:
249:
250: /*
251: * ioInitSocket() - Init socket and allocate resources
252: *
253: * @role = Socket role
254: * @type = Socket type
255: * @proto = Socket protocol
256: * @addr = Bind to address
257: * @port = Bind to port
258: * @buflen = Socket buffer, optional if =0 == BUFSIZ
259: * return: NULL error or !=NULL created socket
260: */
261: sock_t *ioInitSocket(int role, int type, int proto,
262: const char *addr, unsigned short port, size_t buflen);
263: /*
264: * ioCloseSocket() - Close socket and free resources
265: *
266: * @s = Socket
267: * return: none
268: */
269: void ioCloseSocket(sock_t ** __restrict s);
270: #define ioKillSocket(x) (assert((x)), (x)->sock_kill = 1)
271: /*
272: * ioCloseClient() - Close client socket
273: *
274: * @c = Client socket
275: * return: 0 ok or !=0 error
276: */
277: int ioCloseClient(sock_cli_t * __restrict c);
278: /*
279: * ioSetupProg2Socket() - Setup program pool to socket server
280: *
281: * @s = Socket
282: * @p = Program pool
283: * return: -1 error or 0 ok
284: */
285: int ioSetupProg2Socket(sock_t * __restrict s, prog_t * __restrict p);
286: /*
287: * ioUpSocket() - Setup socket for use
288: *
289: * @s = Socket
290: * @arg = Server role = listen backlog queue and Client role = peer address
291: * @timeout = Socket timeout in ms (default -1 infinit)
292: * return: -1 error or 0 ok
293: */
294: int ioUpSocket(sock_t * __restrict s, void *arg, int timeout);
295: /*
296: * ioUpdTimerSocket() - Update timeout of socket
297: *
298: * @c = Client socket
299: * return: none
300: */
301: void ioUpdTimerSocket(sock_cli_t * __restrict c);
302: /*
303: * ioLoopSocket() - Start socket scheduler
304: *
305: * @s = Socket
306: * @rcb = Read callback
307: * return: -1 error or return result from scheduler
308: */
309: int ioLoopSocket(sock_t * __restrict s, sched_task_func_t rcb);
310: /*
311: * ioBridgeProg2Socket() - Start socket scheduler and bridge program to socket
312: *
313: * @s = Socket
314: * @prgname = Program name
315: * return: 0 ok or !=0 error
316: */
317: int ioBridgeProg2Socket(sock_t * __restrict s, const char *prgname);
318:
319:
320: /*
321: * ioPromptRead() - Read data from input h[0] with prompt to output h[1]
322: *
323: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
324: * @csPrompt = Prompt before input, may be NULL
325: * @psData = Readed data
326: * @dataLen = Length of data
327: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
328: */
329: int ioPromptRead(int *h, const char *csPrompt,
330: char * __restrict psData, int dataLen);
331: /*
332: * ioPromptPassword() - Read password from input h[0] with prompt to output h[1]
333: *
334: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
335: * @csPrompt = Prompt before input, may be NULL
336: * @psPass = Readed password
337: * @passLen = Length of password
338: * @confirm = Confirm password, 0 - get password, !=0 Ask for confirmation
339: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
340: */
341: int ioPromptPassword(int *h, const char *csPrompt,
342: char * __restrict psPass, int passLen, int confirm);
343:
344:
345: /*
346: * ioMkDir() - Function for racursive directory creation and validation
347: *
348: * @csDir = Full directory path
349: * @mode = Mode for directory creation if missing dir
350: * return: -1 error, 0 directory path exist, >0 created missing dirs
351: */
352: int ioMkDir(const char *csDir, int mode);
353:
354: /*
355: * ioWatchDirLoop() - Function for watching changes in directory and fire callback
356: *
357: * @csDir = Full directory path
358: * @callback = Callback if raise event! nOp -1 delete, 0 change/move, 1 create
359: * return: -1 error, !=-1 ok, number of total signaled events
360: */
361: int ioWatchDirLoop(const char *csDir, int (*callback)(const char *csName, int nOp));
362:
363:
364: #ifdef AIO_OPS
365: /*
366: * io_aiobulk() - AIO bulk R/W function
367: *
368: * @mode = Bulk wait mode
369: * @acbs = List of aiocb structures
370: * @nacb = Number of aiocb in list
371: * @sig = Event for completed operations, may be =NULL
372: * return: -1 error or 0 ok
373: */
374: int io_aiobulk(int mode, struct aiocb ** __restrict acbs, int nacb,
375: struct sigevent *sig);
376: #endif
377: /*
378: * io_rreadv() - Raw VFS bulk read function
379: *
380: * @fd = File handle
381: * @bufs = Read buffers
382: * @nbufs = Number of read buffers
383: * @offset = Read from position, if -1 read nbytes from current position
384: * @update = Update file handle position !0
385: * return: -1 error or !=-1 readed bytes
386: */
387: int io_rreadv(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
388: int update);
389: /*
390: * io_rwritev() - Raw VFS bulk write function
391: *
392: * @fd = File handle
393: * @bufs = Write buffers
394: * @nbufs = Number of write buffers
395: * @offset = Write to position, if -1 write nbytes to current position
396: * @update = Update file handle position !0
397: * return: -1 error or !=-1 written bytes
398: */
399: int io_rwritev(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
400: int update);
401: /*
402: * io_rread() - Raw VFS read function
403: *
404: * @fd = File handle
405: * @buf = Read buffer
406: * @nbytes = Read buffer size
407: * @offset = Read from position, if -1 read nbytes from current position
408: * @update = Update file handle position !0
409: * return: -1 error or !=-1 readed bytes
410: */
411: int io_rread(int fd, void * __restrict buf, size_t nbytes, off_t offset,
412: int update);
413: /*
414: * io_rwrite() - Raw VFS write function
415: *
416: * @fd = File handle
417: * @buf = Write buffer
418: * @nbytes = Write bytes from buffer
419: * @offset = Write at position, if -1 write nbytes from current position
420: * @update = Update file handle position !0
421: * return: -1 error or !=-1 written bytes
422: */
423: int io_rwrite(int fd, void * __restrict buf, size_t nbytes, off_t offset,
424: int update);
425:
426: /* Disk I/O helper macros */
427: #define io_read(f, b, n) io_rread(f, b, n, -1, 1)
428: #define io_write(f, b, n) io_rwrite(f, b, n, -1, 1)
429:
430:
431: /* Crypto framework */
432:
433: /*
434: * ioCipher() - Cipher wrapper for all supported crypto algorythms
435: *
436: * @pInput = input buffer
437: * @inLen = input buffer len
438: * @ppOutput = output allocated buffe, must be e_free after use
439: * @Cipher = cipher engine, like EVP_bf_cbc() or etc...
440: * @pKey = key
441: * @pIV = IV, salt (8 bytes)
442: * @nMode = Mode 0 - decrypting or 1 - encrypting
443: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
444: */
445: int ioCipher(unsigned char *pInput, int inLen, unsigned char **ppOutput, const EVP_CIPHER *Cipher,
446: unsigned char *pKey, unsigned char *pIV, int nMode);
447:
448: /*
449: * io_Blowfish() - Blowfish cipher algorythm, work with ASCII hex strings
450: *
451: * @pInput = input buffer
452: * @inLen = input buffer len
453: * @ppOutput = output allocated buffe, must be e_free after use
454: * @pKey = key
455: * @pIV = IV, salt (8 bytes)
456: * @nMode = Mode 0 - decrypting or 1 - encrypting
457: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
458: */
459: int io_Blowfish(unsigned char *pInput, int inLen, unsigned char **ppOutput,
460: unsigned char *pKey, unsigned char *pIV, int nMode);
461: /*
462: * io_ctr_AES() - Encrypt/Decrypt stream cipher CTR_AES
463: *
464: * @pInput = Input buffer with ASCII
465: * @inLen = Input buffer data length
466: * @ppOutput = Output buffer with cipher data, must be e_free after use
467: * @pKey = Key
468: * @IV = IVector/Nonce/Counter, Warning: IV must be variable, because we write there!!!
469: * return: -1 error or >-1 how many cipher blocks proceeded
470: */
471: int io_ctr_AES(unsigned char *pInput, int inLen, unsigned char **ppOutput,
472: unsigned char *pKey, unsigned char IV[AES_BLOCK_SIZE]);
473:
474:
475: /*
476: * ioAllocPTY() - Allocate new PTY and TTY
477: *
478: * @ptyfd = master fd, pty
479: * @ttyfd = slave fd, tty
480: * @name = tty device name if not null
481: * @namesiz = name length, must be above 63 bytes.
482: * @term = termios for terminal
483: * @winz = winsize for terminal
484: * return: -1 error or 0 ok
485: */
486: int ioAllocPTY(int *ptyfd, int *ttyfd, char * __restrict name, int namesiz,
487: struct termios * __restrict term, struct winsize * __restrict winz);
488: /*
489: * ioFreePTY() - Release PTY and TTY device
490: *
491: * @ptyfd = master fd, pty (==-1 skip closing pty)
492: * @ttyname = tty filename
493: * return: none
494: */
495: void ioFreePTY(int ptyfd, const char *ttyname);
496: /*
497: * ioChgWinPTY() - Change window size of PTY
498: *
499: * @ptyfd = master fd, pty
500: * @row = row
501: * @col = col
502: * @xpxl = x pixels
503: * @ypxl = y pixels
504: * return: -1 error or 0 ok
505: */
506: int ioChgWinPTY(int ptyfd, unsigned short row, unsigned short col,
507: unsigned short xpxl, unsigned short ypxl);
508: /*
509: * ioSetOwnerTTY() - Set owner to TTY
510: *
511: * @ttyname = tty filename
512: * @UID = uid
513: * @GID = gid
514: * return: -1 error or 0 ok
515: */
516: int ioSetOwnerTTY(const char *ttyname, uid_t UID, gid_t GID);
517: /*
518: * ioSetSidTTY() - Makes the process's controlling TTY and sets it to sane modes.
519: *
520: * @ttyfd = slave fd, tty
521: * @ttyname = tty filename
522: * return: -1 error or 0 ok
523: */
524: int ioSetSidTTY(int *ttyfd, const char *ttyname);
525: /*
526: * ioSetRAWMode() - Enter into RAW mode
527: *
528: * @fd = tty fd
529: * @otio = saved old termios for later restore if !=NULL
530: * return: -1 error or 0 ok
531: */
532: int ioSetRAWMode(int fd, struct termios *otio);
533: /*
534: * ioRestoreMode() - Restore termios to tty fd
535: *
536: * @fd = tty fd
537: * @tio = termios structure for restore
538: * return: -1 error or 0 ok
539: */
540: int ioRestoreMode(int fd, struct termios tio);
541: /*
542: * ioForkPTY() - Fork new process with session leader and new TTY
543: *
544: * @ptyfd = master fd, pty
545: * @name = tty device name if not null
546: * @namesiz = name length, must be above 63 bytes.
547: * @term = termios for terminal
548: * @winz = winsize for terminal
549: * @otio = old termios structure for restore
550: * return: -1 error, 0 child process or >0 parent: pid of child
551: */
552: pid_t ioForkPTY(int *ptyfd, char * __restrict name, int namesiz, struct termios * __restrict term,
553: struct winsize * __restrict winz, struct termios * __restrict otio);
554:
555: /*
556: * ioCreatePIDFile() - Create PID file
557: *
558: * @csName = PID filename
559: * @ifExists = !=0 if filename exists return error
560: * return: -1 error or 0 ok
561: */
562: int ioCreatePIDFile(const char *csName, int ifExists);
563:
564: /*
565: * ioSendFile() - AITNET sendfile() userland implementation, not dependant from OS
566: *
567: * @s = socket
568: * @csFile = file for send
569: * @sendLen = bytes to send, if 0 send all data
570: * @offset = start file offset
571: * @sndbuf = SO_SNDBUF value, if 0 use default
572: * return: 0 error, >0 ok, sended bytes
573: */
574: size_t ioSendFile(int s, const char *csFile, size_t sendLen, off_t offset, int sndbuf);
575: /*
576: * ioRecvFile() - Receive file from socket, fastest (zero-copy) way
577: *
578: * @s = socket
579: * @csFile = file for receive
580: * @recvLen = receive bytes
581: * @over = overwrite file if exists with mode like 0644
582: * @rcvbuf = SO_RCVBUF value, if 0 use default
583: * return: 0 error, >0 ok, received bytes
584: */
585: size_t ioRecvFile(int s, const char *csFile, size_t recvLen, int over, int rcvbuf);
586:
587: /*
588: * ioRealFileName() - Get real file name
589: *
590: * @fname = filename
591: * return: =NULL error or !=NULL real filename, should be free with e_free()
592: */
593: char *ioRealFileName(const char *fname);
594:
595: /* Buffered file access over memory block */
596:
597: /*
598: * io_fmemopen() - File buffered stream operations over memory block
599: *
600: * @base = Base address of memory block, if =NULL Infinit length(auto-grow)
601: * @basesize = Size of memory block
602: * return: NULL error or !=NULL Opened file resource
603: */
604: FILE *io_fmemopen(void ** __restrict base, off_t basesize);
605: /*
606: * io_fmapopen() - File buffered stream operations over MMAP block
607: *
608: * @csFile = Filename for MMAP, if =NULL private MMAP block
609: * @mode = File open mode
610: * @perm = If file not exists will be created with this access permissions
611: * @prot = MMAP protection
612: * @flags = MMAP mode flags
613: * @offset = Map from file offset, if csFile==NULL then this is size of MMAP private block
614: * return: NULL error or !=NULL Opened file resource
615: */
616: FILE *io_fmapopen(const char *csFile, int mode, int perm, int prot, int flags, off_t offset);
617: /*
618: * io_fd2buf() - Convert open file handle to buffered file I/O
619: *
620: * @fd = File handle
621: * @mode = Permissions for new buffered file I/O
622: * return: NULL error or open buffered file
623: */
624: FILE *io_fd2buf(int fd, const char *mode);
625: /*
626: * io_dumbFile() - Create empry or dumb file with fixed size
627: *
628: * @csFile = Filename for create
629: * @mode = File access permissions
630: * @size = File size
631: * return: -1 error or open file handle
632: */
633: int io_dumbFile(const char *csFile, int mode, off_t size);
634:
635:
636: /*
637: * io_get1stiface() - Get first interface of host
638: *
639: * @szIface = interface string buffer
640: * @iflen = size of interface buffer
641: * return: -1 error or 0 ok
642: */
643: int io_get1stiface(char *szIface, int iflen);
644: /*
645: * io_getmaciface() - Get MAC address from interface name
646: *
647: * @csIface = interface name
648: * @ea = ethernet address
649: * return: -1 error, 0 ok or 1 not found
650: */
651: int io_getmaciface(const char *csIface, ether_addr_t * __restrict ea);
652: /*
653: * io_etherOpen() - Open BPF interface to device
654: *
655: * @csIface = interface name
656: * @flags = open flags
657: * @whdr = with complete headers
658: * @wdlt = with data link type
659: * @buflen = buffer length
660: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
661: * return: -1 error or >-1 bpf handle
662: */
663: int io_etherOpen(const char *csIface, int flags, int whdr, int wdlt,
664: unsigned int *buflen, void **zcbuf);
665: /*
666: * io_etherClose() - Close BPF interface
667: *
668: * @eth = bpf handle
669: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
670: * return: none
671: */
672: void io_etherClose(int eth, void **zcbuf);
673:
674: /*
675: * io_etherFilter() - BPF filter routine
676: *
677: * @eth = bpf handle
678: * @io = filter direction
679: * (IO_ETHER_FILTER_PROMISC|IO_ETHER_FILTER_NOTREAD|IO_ETHER_FILTER_READ|IO_ETHER_FILTER_WRITE)
680: * @insn = BPF filter instruction array
681: * @insnlen = Length of BPF filter instruction array
682: * return: -1 error or 0 ok
683: */
684: int io_etherFilter(int eth, int io, struct bpf_insn * __restrict insn, size_t insnlen);
685:
686: /*
687: * io_etherSend() - Send packet to bpf
688: *
689: * @eth = bpf handle
690: * @buf = buffer
691: * @buflen = buffer length
692: * return: -1 error or !=-1 written bytes
693: */
694: ssize_t io_etherSend(int eth, const void *buf, size_t buflen);
695: /*
696: * io_etherRecv() - Receive packet from bpf
697: *
698: * @eth = bpf handle
699: * @buf = buffer
700: * @buflen = buffer length
701: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
702: * return: -1 error or !=-1 readed bytes
703: */
704: ssize_t io_etherRecv(int eth, void * __restrict buf,
705: size_t buflen, void * __restrict zcbuf);
706:
707:
708: #endif
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