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 1.34.2.1 2013/08/26 23:30:27 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:
66:
67: #ifndef STRSIZ
68: #define STRSIZ 256
69: #endif
70:
71: #define IO_SOCK_ROLE_CLIENT 0
72: #define IO_SOCK_ROLE_SERVER 1
73:
74:
75: typedef struct tagCliSock sock_cli_t;
76: typedef void *(*sock_cb_t)(sock_cli_t*);
77: struct tagCliSock {
78: void *cli_parent;
79: pthread_t cli_tid;
80: int cli_fd;
81: sockaddr_t cli_addr;
82:
83: sock_cb_t cli_func;
84: void *cli_arg;
85:
86: ait_val_t cli_buf;
87:
88: TAILQ_ENTRY(tagCliSock) cli_node;
89: };
90: typedef struct {
91: int sock_role;
92: int sock_backq;
93: int sock_type;
94: int sock_proto;
95: int sock_fd;
96: sockaddr_t sock_addr;
97: sockaddr_t sock_peer;
98:
99: ait_val_t sock_buf;
100:
101: pthread_mutex_t sock_mtx;
102: TAILQ_HEAD(, tagCliSock) sock_cli;
103: } sock_t;
104:
105:
106: // io_GetErrno() Get error code of last operation
107: int io_GetErrno();
108: // io_GetError() Get error text of last operation
109: const char *io_GetError();
110:
111:
112: /*
113: * ioInitSocket() - Init socket and allocate resources
114: *
115: * @role = Socket role
116: * @type = Socket type
117: * @proto = Socket protocol
118: * @addr = Bind to address
119: * @port = Bind to port
120: * @buflen = Socket buffer, optional if =0 == BUFSIZ
121: * return: NULL error or !=NULL created socket
122: */
123: sock_t *ioInitSocket(int role, int type, int proto,
124: const char *addr, unsigned short port, size_t buflen);
125: /*
126: * ioCloseSocket() - Close socket and free resources
127: *
128: * @s = Socket
129: * return: none
130: */
131: void ioCloseSocket(sock_t ** __restrict s);
132: /*
133: * ioUpSocket() - Setup socket for use
134: *
135: * @s = Socket
136: * @arg = Server role = listen backlog queue and Client role = peer address
137: * return: -1 error or 0 ok
138: */
139: int ioUpSocket(sock_t * __restrict s, void *arg);
140: /*
141: * ioAcceptSocket() - Accept clients
142: *
143: * @s = Socket
144: * @f = callback function for client handling
145: * @arg = optional argument for callback function
146: * return: -1 error or 0 ok
147: */
148: int ioAcceptSocket(sock_t * __restrict s, sock_cb_t f, void *arg);
149:
150: /*
151: * ioPromptRead() - Read data from input h[0] with prompt to output h[1]
152: *
153: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
154: * @csPrompt = Prompt before input, may be NULL
155: * @psData = Readed data
156: * @dataLen = Length of data
157: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
158: */
159: int ioPromptRead(int *h, const char *csPrompt, char * __restrict psData, int dataLen);
160: /*
161: * ioPromptPassword() - Read password from input h[0] with prompt to output h[1]
162: *
163: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
164: * @csPrompt = Prompt before input, may be NULL
165: * @psPass = Readed password
166: * @passLen = Length of password
167: * @confirm = Confirm password, 0 - get password, !=0 Ask for confirmation
168: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
169: */
170: int ioPromptPassword(int *h, const char *csPrompt, char * __restrict psPass, int passLen, int confirm);
171:
172:
173: /*
174: * ioMkDir() - Function for racursive directory creation and validation
175: *
176: * @csDir = Full directory path
177: * @mode = Mode for directory creation if missing dir
178: * return: -1 error, 0 directory path exist, >0 created missing dirs
179: */
180: int ioMkDir(const char *csDir, int mode);
181:
182: /*
183: * ioWatchDirLoop() - Function for watching changes in directory and fire callback
184: *
185: * @csDir = Full directory path
186: * @callback = Callback if raise event! nOp -1 delete, 0 change/move, 1 create
187: * return: -1 error, !=-1 ok, number of total signaled events
188: */
189: int ioWatchDirLoop(const char *csDir, int (*callback)(const char *csName, int nOp));
190:
191:
192: #ifdef AIO_OPS
193: /*
194: * io_aiobulk() - AIO bulk R/W function
195: *
196: * @mode = Bulk wait mode
197: * @acbs = List of aiocb structures
198: * @nacb = Number of aiocb in list
199: * @sig = Event for completed operations, may be =NULL
200: * return: -1 error or 0 ok
201: */
202: int io_aiobulk(int mode, struct aiocb ** __restrict acbs, int nacb,
203: struct sigevent *sig);
204: #endif
205: /*
206: * io_rreadv() - Raw VFS bulk read function
207: *
208: * @fd = File handle
209: * @bufs = Read buffers
210: * @nbufs = Number of read buffers
211: * @offset = Read from position, if -1 read nbytes from current position
212: * @update = Update file handle position !0
213: * return: -1 error or !=-1 readed bytes
214: */
215: int io_rreadv(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
216: int update);
217: /*
218: * io_rwritev() - Raw VFS bulk write function
219: *
220: * @fd = File handle
221: * @bufs = Write buffers
222: * @nbufs = Number of write buffers
223: * @offset = Write to position, if -1 write nbytes to current position
224: * @update = Update file handle position !0
225: * return: -1 error or !=-1 written bytes
226: */
227: int io_rwritev(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
228: int update);
229: /*
230: * io_rread() - Raw VFS read function
231: *
232: * @fd = File handle
233: * @buf = Read buffer
234: * @nbytes = Read buffer size
235: * @offset = Read from position, if -1 read nbytes from current position
236: * @update = Update file handle position !0
237: * return: -1 error or !=-1 readed bytes
238: */
239: int io_rread(int fd, void * __restrict buf, size_t nbytes, off_t offset,
240: int update);
241: /*
242: * io_rwrite() - Raw VFS write function
243: *
244: * @fd = File handle
245: * @buf = Write buffer
246: * @nbytes = Write bytes from buffer
247: * @offset = Write at position, if -1 write nbytes from current position
248: * @update = Update file handle position !0
249: * return: -1 error or !=-1 written bytes
250: */
251: int io_rwrite(int fd, void * __restrict buf, size_t nbytes, off_t offset,
252: int update);
253:
254: /* Disk I/O helper macros */
255: #define io_read(f, b, n) io_rread(f, b, n, -1, 1)
256: #define io_write(f, b, n) io_rwrite(f, b, n, -1, 1)
257:
258:
259: /* Crypto framework */
260:
261: /*
262: * ioCipher() - Cipher wrapper for all supported crypto algorythms
263: *
264: * @pInput = input buffer
265: * @inLen = input buffer len
266: * @ppOutput = output allocated buffe, must be e_free after use
267: * @Cipher = cipher engine, like EVP_bf_cbc() or etc...
268: * @pKey = key
269: * @pIV = IV, salt (8 bytes)
270: * @nMode = Mode 0 - decrypting or 1 - encrypting
271: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
272: */
273: int ioCipher(unsigned char *pInput, int inLen, unsigned char **ppOutput, const EVP_CIPHER *Cipher,
274: unsigned char *pKey, unsigned char *pIV, int nMode);
275:
276: /*
277: * io_Blowfish() - Blowfish cipher algorythm, work with ASCII hex strings
278: *
279: * @pInput = input buffer
280: * @inLen = input buffer len
281: * @ppOutput = output allocated buffe, must be e_free after use
282: * @pKey = key
283: * @pIV = IV, salt (8 bytes)
284: * @nMode = Mode 0 - decrypting or 1 - encrypting
285: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
286: */
287: int io_Blowfish(unsigned char *pInput, int inLen, unsigned char **ppOutput,
288: unsigned char *pKey, unsigned char *pIV, int nMode);
289: /*
290: * io_ctr_AES() - Encrypt/Decrypt stream cipher CTR_AES
291: *
292: * @pInput = Input buffer with ASCII
293: * @inLen = Input buffer data length
294: * @ppOutput = Output buffer with cipher data, must be e_free after use
295: * @pKey = Key
296: * @IV = IVector/Nonce/Counter, Warning: IV must be variable, because we write there!!!
297: * return: -1 error or >-1 how many cipher blocks proceeded
298: */
299: int io_ctr_AES(unsigned char *pInput, int inLen, unsigned char **ppOutput,
300: unsigned char *pKey, unsigned char IV[AES_BLOCK_SIZE]);
301:
302:
303: /*
304: * ioAllocPTY() - Allocate new PTY and TTY
305: *
306: * @ptyfd = master fd, pty
307: * @ttyfd = slave fd, tty
308: * @name = tty device name if not null
309: * @namesiz = name length, must be above 63 bytes.
310: * @term = termios for terminal
311: * @winz = winsize for terminal
312: * return: -1 error or 0 ok
313: */
314: int ioAllocPTY(int *ptyfd, int *ttyfd, char * __restrict name, int namesiz,
315: struct termios * __restrict term, struct winsize * __restrict winz);
316: /*
317: * ioFreePTY() - Release PTY and TTY device
318: *
319: * @ptyfd = master fd, pty (==-1 skip closing pty)
320: * @ttyname = tty filename
321: * return: none
322: */
323: void ioFreePTY(int ptyfd, const char *ttyname);
324: /*
325: * ioChgWinPTY() - Change window size of PTY
326: *
327: * @ptyfd = master fd, pty
328: * @row = row
329: * @col = col
330: * @xpxl = x pixels
331: * @ypxl = y pixels
332: * return: -1 error or 0 ok
333: */
334: int ioChgWinPTY(int ptyfd, unsigned short row, unsigned short col,
335: unsigned short xpxl, unsigned short ypxl);
336: /*
337: * ioSetOwnerTTY() - Set owner to TTY
338: *
339: * @ttyname = tty filename
340: * @UID = uid
341: * @GID = gid
342: * return: -1 error or 0 ok
343: */
344: int ioSetOwnerTTY(const char *ttyname, uid_t UID, gid_t GID);
345: /*
346: * ioSetSidTTY() - Makes the process's controlling TTY and sets it to sane modes.
347: *
348: * @ttyfd = slave fd, tty
349: * @ttyname = tty filename
350: * return: -1 error or 0 ok
351: */
352: int ioSetSidTTY(int *ttyfd, const char *ttyname);
353: /*
354: * ioSetRAWMode() - Enter into RAW mode
355: *
356: * @fd = tty fd
357: * @otio = saved old termios for later restore if !=NULL
358: * return: -1 error or 0 ok
359: */
360: int ioSetRAWMode(int fd, struct termios *otio);
361: /*
362: * ioRestoreMode() - Restore termios to tty fd
363: *
364: * @fd = tty fd
365: * @tio = termios structure for restore
366: * return: -1 error or 0 ok
367: */
368: int ioRestoreMode(int fd, struct termios tio);
369: /*
370: * ioForkPTY() - Fork new process with session leader and new TTY
371: *
372: * @ptyfd = master fd, pty
373: * @name = tty device name if not null
374: * @namesiz = name length, must be above 63 bytes.
375: * @term = termios for terminal
376: * @winz = winsize for terminal
377: * @otio = old termios structure for restore
378: * return: -1 error, 0 child process or >0 parent: pid of child
379: */
380: pid_t ioForkPTY(int *ptyfd, char * __restrict name, int namesiz, struct termios * __restrict term,
381: struct winsize * __restrict winz, struct termios * __restrict otio);
382:
383: /*
384: * ioCreatePIDFile() - Create PID file
385: *
386: * @csName = PID filename
387: * @ifExists = !=0 if filename exists return error
388: * return: -1 error or 0 ok
389: */
390: int ioCreatePIDFile(const char *csName, int ifExists);
391:
392: /*
393: * ioSendFile() - AITNET sendfile() userland implementation, not dependant from OS
394: *
395: * @s = socket
396: * @csFile = file for send
397: * @sendLen = bytes to send, if 0 send all data
398: * @offset = start file offset
399: * @sndbuf = SO_SNDBUF value, if 0 use default
400: * return: 0 error, >0 ok, sended bytes
401: */
402: size_t ioSendFile(int s, const char *csFile, size_t sendLen, off_t offset, int sndbuf);
403: /*
404: * ioRecvFile() - Receive file from socket, fastest (zero-copy) way
405: *
406: * @s = socket
407: * @csFile = file for receive
408: * @recvLen = receive bytes
409: * @over = overwrite file if exists with mode like 0644
410: * @rcvbuf = SO_RCVBUF value, if 0 use default
411: * return: 0 error, >0 ok, received bytes
412: */
413: size_t ioRecvFile(int s, const char *csFile, size_t recvLen, int over, int rcvbuf);
414:
415: /*
416: * ioRealFileName() - Get real file name
417: *
418: * @fname = filename
419: * return: =NULL error or !=NULL real filename, should be free with e_free()
420: */
421: char *ioRealFileName(const char *fname);
422:
423: /* Buffered file access over memory block */
424:
425: /*
426: * io_fmemopen() - File buffered stream operations over memory block
427: *
428: * @base = Base address of memory block, if =NULL Infinit length(auto-grow)
429: * @basesize = Size of memory block
430: * return: NULL error or !=NULL Opened file resource
431: */
432: FILE *io_fmemopen(void ** __restrict base, off_t basesize);
433: /*
434: * io_fmapopen() - File buffered stream operations over MMAP block
435: *
436: * @csFile = Filename for MMAP, if =NULL private MMAP block
437: * @mode = File open mode
438: * @perm = If file not exists will be created with this access permissions
439: * @prot = MMAP protection
440: * @flags = MMAP mode flags
441: * @offset = Map from file offset, if csFile==NULL then this is size of MMAP private block
442: * return: NULL error or !=NULL Opened file resource
443: */
444: FILE *io_fmapopen(const char *csFile, int mode, int perm, int prot, int flags, off_t offset);
445: /*
446: * io_fd2buf() - Convert open file handle to buffered file I/O
447: *
448: * @fd = File handle
449: * @mode = Permissions for new buffered file I/O
450: * return: NULL error or open buffered file
451: */
452: FILE *io_fd2buf(int fd, const char *mode);
453: /*
454: * io_dumbFile() - Create empry or dumb file with fixed size
455: *
456: * @csFile = Filename for create
457: * @mode = File access permissions
458: * @size = File size
459: * return: -1 error or open file handle
460: */
461: int io_dumbFile(const char *csFile, int mode, off_t size);
462:
463:
464: /*
465: * io_get1stiface() - Get first interface of host
466: *
467: * @szIface = interface string buffer
468: * @iflen = size of interface buffer
469: * return: -1 error or 0 ok
470: */
471: int io_get1stiface(char *szIface, int iflen);
472: /*
473: * io_etherOpen() - Open BPF interface to device
474: *
475: * @csIface = interface name
476: * @flags = open flags
477: * @whdr = with complete headers
478: * @wdlt = with data link type
479: * @buflen = buffer length
480: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
481: * return: -1 error or >-1 bpf handle
482: */
483: int io_etherOpen(const char *csIface, int flags, int whdr, int wdlt,
484: unsigned int *buflen, void **zcbuf);
485: /*
486: * io_etherClose() - Close BPF interface
487: *
488: * @eth = bpf handle
489: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
490: * return: none
491: */
492: void io_etherClose(int eth, void **zcbuf);
493:
494: /*
495: * io_etherSend() - Send packet to bpf
496: *
497: * @eth = bpf handle
498: * @buf = buffer
499: * @buflen = buffer length
500: * return: -1 error or !=-1 written bytes
501: */
502: ssize_t io_etherSend(int eth, const void *buf, size_t buflen);
503: /*
504: * io_etherRecv() - Receive packet from bpf
505: *
506: * @eth = bpf handle
507: * @buf = buffer
508: * @buflen = buffer length
509: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
510: * return: -1 error or !=-1 readed bytes
511: */
512: ssize_t io_etherRecv(int eth, void * __restrict buf,
513: size_t buflen, void * __restrict zcbuf);
514:
515:
516: #endif
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