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 1.32 2013/06/26 22:48:53 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 <netinet/in.h>
63:
64:
65: #ifndef STRSIZ
66: #define STRSIZ 256
67: #endif
68:
69:
70: // io_GetErrno() Get error code of last operation
71: int io_GetErrno();
72: // io_GetError() Get error text of last operation
73: const char *io_GetError();
74:
75:
76: /*
77: * ioPromptRead() - Read data from input h[0] with prompt to output h[1]
78: *
79: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
80: * @csPrompt = Prompt before input, may be NULL
81: * @psData = Readed data
82: * @dataLen = Length of data
83: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
84: */
85: int ioPromptRead(int *h, const char *csPrompt, char * __restrict psData, int dataLen);
86: /*
87: * ioPromptPassword() - Read password from input h[0] with prompt to output h[1]
88: *
89: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
90: * @csPrompt = Prompt before input, may be NULL
91: * @psPass = Readed password
92: * @passLen = Length of password
93: * @confirm = Confirm password, 0 - get password, !=0 Ask for confirmation
94: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
95: */
96: int ioPromptPassword(int *h, const char *csPrompt, char * __restrict psPass, int passLen, int confirm);
97:
98:
99: /*
100: * ioMkDir() - Function for racursive directory creation and validation
101: *
102: * @csDir = Full directory path
103: * @mode = Mode for directory creation if missing dir
104: * return: -1 error, 0 directory path exist, >0 created missing dirs
105: */
106: int ioMkDir(const char *csDir, int mode);
107:
108: /*
109: * ioWatchDirLoop() - Function for watching changes in directory and fire callback
110: *
111: * @csDir = Full directory path
112: * @callback = Callback if raise event! nOp -1 delete, 0 change/move, 1 create
113: * return: -1 error, !=-1 ok, number of total signaled events
114: */
115: int ioWatchDirLoop(const char *csDir, int (*callback)(const char *csName, int nOp));
116:
117:
118: #ifdef AIO_OPS
119: /*
120: * io_aiobulk() - AIO bulk R/W function
121: *
122: * @mode = Bulk wait mode
123: * @acbs = List of aiocb structures
124: * @nacb = Number of aiocb in list
125: * @sig = Event for completed operations, may be =NULL
126: * return: -1 error or 0 ok
127: */
128: int io_aiobulk(int mode, struct aiocb ** __restrict acbs, int nacb,
129: struct sigevent *sig);
130: #endif
131: /*
132: * io_rreadv() - Raw VFS bulk read function
133: *
134: * @fd = File handle
135: * @bufs = Read buffers
136: * @nbufs = Number of read buffers
137: * @offset = Read from position, if -1 read nbytes from current position
138: * @update = Update file handle position !0
139: * return: -1 error or !=-1 readed bytes
140: */
141: int io_rreadv(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
142: int update);
143: /*
144: * io_rwritev() - Raw VFS bulk write function
145: *
146: * @fd = File handle
147: * @bufs = Write buffers
148: * @nbufs = Number of write buffers
149: * @offset = Write to position, if -1 write nbytes to current position
150: * @update = Update file handle position !0
151: * return: -1 error or !=-1 written bytes
152: */
153: int io_rwritev(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
154: int update);
155: /*
156: * io_rread() - Raw VFS read function
157: *
158: * @fd = File handle
159: * @buf = Read buffer
160: * @nbytes = Read buffer size
161: * @offset = Read from position, if -1 read nbytes from current position
162: * @update = Update file handle position !0
163: * return: -1 error or !=-1 readed bytes
164: */
165: int io_rread(int fd, void * __restrict buf, size_t nbytes, off_t offset,
166: int update);
167: /*
168: * io_rwrite() - Raw VFS write function
169: *
170: * @fd = File handle
171: * @buf = Write buffer
172: * @nbytes = Write bytes from buffer
173: * @offset = Write at position, if -1 write nbytes from current position
174: * @update = Update file handle position !0
175: * return: -1 error or !=-1 written bytes
176: */
177: int io_rwrite(int fd, void * __restrict buf, size_t nbytes, off_t offset,
178: int update);
179:
180: /* Disk I/O helper macros */
181: #define io_read(f, b, n) io_rread(f, b, n, -1, 1)
182: #define io_write(f, b, n) io_rwrite(f, b, n, -1, 1)
183:
184:
185: /* Crypto framework */
186:
187: /*
188: * ioCipher() - Cipher wrapper for all supported crypto algorythms
189: *
190: * @pInput = input buffer
191: * @inLen = input buffer len
192: * @ppOutput = output allocated buffe, must be e_free after use
193: * @Cipher = cipher engine, like EVP_bf_cbc() or etc...
194: * @pKey = key
195: * @pIV = IV, salt (8 bytes)
196: * @nMode = Mode 0 - decrypting or 1 - encrypting
197: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
198: */
199: int ioCipher(unsigned char *pInput, int inLen, unsigned char **ppOutput, const EVP_CIPHER *Cipher,
200: unsigned char *pKey, unsigned char *pIV, int nMode);
201:
202: /*
203: * io_Blowfish() - Blowfish cipher algorythm, work with ASCII hex strings
204: *
205: * @pInput = input buffer
206: * @inLen = input buffer len
207: * @ppOutput = output allocated buffe, must be e_free after use
208: * @pKey = key
209: * @pIV = IV, salt (8 bytes)
210: * @nMode = Mode 0 - decrypting or 1 - encrypting
211: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
212: */
213: int io_Blowfish(unsigned char *pInput, int inLen, unsigned char **ppOutput,
214: unsigned char *pKey, unsigned char *pIV, int nMode);
215: /*
216: * io_ctr_AES() - Encrypt/Decrypt stream cipher CTR_AES
217: *
218: * @pInput = Input buffer with ASCII
219: * @inLen = Input buffer data length
220: * @ppOutput = Output buffer with cipher data, must be e_free after use
221: * @pKey = Key
222: * @IV = IVector/Nonce/Counter, Warning: IV must be variable, because we write there!!!
223: * return: -1 error or >-1 how many cipher blocks proceeded
224: */
225: int io_ctr_AES(unsigned char *pInput, int inLen, unsigned char **ppOutput,
226: unsigned char *pKey, unsigned char IV[AES_BLOCK_SIZE]);
227:
228:
229: /*
230: * ioAllocPTY() - Allocate new PTY and TTY
231: *
232: * @ptyfd = master fd, pty
233: * @ttyfd = slave fd, tty
234: * @name = tty device name if not null
235: * @namesiz = name length, must be above 63 bytes.
236: * @term = termios for terminal
237: * @winz = winsize for terminal
238: * return: -1 error or 0 ok
239: */
240: int ioAllocPTY(int *ptyfd, int *ttyfd, char * __restrict name, int namesiz,
241: struct termios * __restrict term, struct winsize * __restrict winz);
242: /*
243: * ioFreePTY() - Release PTY and TTY device
244: *
245: * @ptyfd = master fd, pty (==-1 skip closing pty)
246: * @ttyname = tty filename
247: * return: none
248: */
249: void ioFreePTY(int ptyfd, const char *ttyname);
250: /*
251: * ioChgWinPTY() - Change window size of PTY
252: *
253: * @ptyfd = master fd, pty
254: * @row = row
255: * @col = col
256: * @xpxl = x pixels
257: * @ypxl = y pixels
258: * return: -1 error or 0 ok
259: */
260: int ioChgWinPTY(int ptyfd, unsigned short row, unsigned short col,
261: unsigned short xpxl, unsigned short ypxl);
262: /*
263: * ioSetOwnerTTY() - Set owner to TTY
264: *
265: * @ttyname = tty filename
266: * @UID = uid
267: * @GID = gid
268: * return: -1 error or 0 ok
269: */
270: int ioSetOwnerTTY(const char *ttyname, uid_t UID, gid_t GID);
271: /*
272: * ioSetSidTTY() - Makes the process's controlling TTY and sets it to sane modes.
273: *
274: * @ttyfd = slave fd, tty
275: * @ttyname = tty filename
276: * return: -1 error or 0 ok
277: */
278: int ioSetSidTTY(int *ttyfd, const char *ttyname);
279: /*
280: * ioSetRAWMode() - Enter into RAW mode
281: *
282: * @fd = tty fd
283: * @otio = saved old termios for later restore if !=NULL
284: * return: -1 error or 0 ok
285: */
286: int ioSetRAWMode(int fd, struct termios *otio);
287: /*
288: * ioRestoreMode() - Restore termios to tty fd
289: *
290: * @fd = tty fd
291: * @tio = termios structure for restore
292: * return: -1 error or 0 ok
293: */
294: int ioRestoreMode(int fd, struct termios tio);
295: /*
296: * ioForkPTY() - Fork new process with session leader and new TTY
297: *
298: * @ptyfd = master fd, pty
299: * @name = tty device name if not null
300: * @namesiz = name length, must be above 63 bytes.
301: * @term = termios for terminal
302: * @winz = winsize for terminal
303: * @otio = old termios structure for restore
304: * return: -1 error, 0 child process or >0 parent: pid of child
305: */
306: pid_t ioForkPTY(int *ptyfd, char * __restrict name, int namesiz, struct termios * __restrict term,
307: struct winsize * __restrict winz, struct termios * __restrict otio);
308:
309: /*
310: * ioCreatePIDFile() - Create PID file
311: *
312: * @csName = PID filename
313: * @ifExists = !=0 if filename exists return error
314: * return: -1 error or 0 ok
315: */
316: int ioCreatePIDFile(const char *csName, int ifExists);
317:
318: /*
319: * ioSendFile() - AITNET sendfile() userland implementation, not dependant from OS
320: *
321: * @s = socket
322: * @csFile = file for send
323: * @sendLen = bytes to send, if 0 send all data
324: * @offset = start file offset
325: * @sndbuf = SO_SNDBUF value, if 0 use default
326: * return: 0 error, >0 ok, sended bytes
327: */
328: size_t ioSendFile(int s, const char *csFile, size_t sendLen, off_t offset, int sndbuf);
329: /*
330: * ioRecvFile() - Receive file from socket, fastest (zero-copy) way
331: *
332: * @s = socket
333: * @csFile = file for receive
334: * @recvLen = receive bytes
335: * @over = overwrite file if exists with mode like 0644
336: * @rcvbuf = SO_RCVBUF value, if 0 use default
337: * return: 0 error, >0 ok, received bytes
338: */
339: size_t ioRecvFile(int s, const char *csFile, size_t recvLen, int over, int rcvbuf);
340:
341: /*
342: * ioRealFileName() - Get real file name
343: *
344: * @fname = filename
345: * return: =NULL error or !=NULL real filename, should be free with e_free()
346: */
347: char *ioRealFileName(const char *fname);
348:
349: /* Buffered file access over memory block */
350:
351: /*
352: * io_fmemopen() - File buffered stream operations over memory block
353: *
354: * @base = Base address of memory block, if =NULL Infinit length(auto-grow)
355: * @basesize = Size of memory block
356: * return: NULL error or !=NULL Opened file resource
357: */
358: FILE *io_fmemopen(void ** __restrict base, off_t basesize);
359: /*
360: * io_fmapopen() - File buffered stream operations over MMAP block
361: *
362: * @csFile = Filename for MMAP, if =NULL private MMAP block
363: * @mode = File open mode
364: * @perm = If file not exists will be created with this access permissions
365: * @prot = MMAP protection
366: * @flags = MMAP mode flags
367: * @offset = Map from file offset, if csFile==NULL then this is size of MMAP private block
368: * return: NULL error or !=NULL Opened file resource
369: */
370: FILE *io_fmapopen(const char *csFile, int mode, int perm, int prot, int flags, off_t offset);
371: /*
372: * io_fd2buf() - Convert open file handle to buffered file I/O
373: *
374: * @fd = File handle
375: * @mode = Permissions for new buffered file I/O
376: * return: NULL error or open buffered file
377: */
378: FILE *io_fd2buf(int fd, const char *mode);
379: /*
380: * io_dumbFile() - Create empry or dumb file with fixed size
381: *
382: * @csFile = Filename for create
383: * @mode = File access permissions
384: * @size = File size
385: * return: -1 error or open file handle
386: */
387: int io_dumbFile(const char *csFile, int mode, off_t size);
388:
389:
390: /*
391: * io_get1stiface() - Get first interface of host
392: *
393: * @szIface = interface string buffer
394: * @iflen = size of interface buffer
395: * return: -1 error or 0 ok
396: */
397: int io_get1stiface(char *szIface, int iflen);
398: /*
399: * io_etherOpen() - Open BPF interface to device
400: *
401: * @csIface = interface name
402: * @flags = open flags
403: * @whdr = with complete headers
404: * @buflen = buffer length
405: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
406: * return: -1 error or >-1 bpf handle
407: */
408: int io_etherOpen(const char *csIface, int flags, int whdr,
409: unsigned int *buflen, void **zcbuf);
410: /*
411: * io_etherClose() - Close BPF interface
412: *
413: * @eth = bpf handle
414: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
415: * return: none
416: */
417: void io_etherClose(int eth, void **zcbuf);
418:
419: /*
420: * io_etherSend() - Send packet to bpf
421: *
422: * @eth = bpf handle
423: * @buf = buffer
424: * @buflen = buffer length
425: * return: -1 error or !=-1 written bytes
426: */
427: ssize_t io_etherSend(int eth, const void *buf, size_t buflen);
428: /*
429: * io_etherRecv() - Receive packet from bpf
430: *
431: * @eth = bpf handle
432: * @buf = buffer
433: * @buflen = buffer length
434: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
435: * return: -1 error or !=-1 readed bytes
436: */
437: ssize_t io_etherRecv(int eth, void * __restrict buf,
438: size_t buflen, void * __restrict zcbuf);
439:
440:
441: #endif
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