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 2013/08/13 00:17:28 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 {
76: int sock_role;
77: int sock_backq;
78: int sock_type;
79: int sock_proto;
80: int sock_fd;
81: sockaddr_t sock_addr;
82:
83: sockaddr_t sock_peer;
84:
85: ait_val_t sock_buf;
86: } sock_t;
87:
88:
89: // io_GetErrno() Get error code of last operation
90: int io_GetErrno();
91: // io_GetError() Get error text of last operation
92: const char *io_GetError();
93:
94:
95: /*
96: * ioInitSocket() - Init socket and allocate resources
97: *
98: * @role = Socket role
99: * @type = Socket type
100: * @proto = Socket protocol
101: * @addr = Bind to address
102: * @port = Bind to port
103: * @buflen = Socket buffer, optional if =0 == BUFSIZ
104: * return: NULL error or !=NULL created socket
105: */
106: sock_t *ioInitSocket(int role, int type, int proto,
107: const char *addr, unsigned short port, size_t buflen);
108: /*
109: * ioCloseSocket() - Close socket and free resources
110: *
111: * @s = Socket
112: * return: none
113: */
114: void ioCloseSocket(sock_t ** __restrict s);
115: /*
116: * ioUpSocket() - Setup socket for use
117: *
118: * @s = Socket
119: * @arg = Server role = listen backlog queue and Client role = peer address
120: * return: -1 error or 0 ok
121: */
122: int ioUpSocket(sock_t * __restrict s, void *arg);
123:
124: /*
125: * ioPromptRead() - Read data from input h[0] with prompt to output h[1]
126: *
127: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
128: * @csPrompt = Prompt before input, may be NULL
129: * @psData = Readed data
130: * @dataLen = Length of data
131: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
132: */
133: int ioPromptRead(int *h, const char *csPrompt, char * __restrict psData, int dataLen);
134: /*
135: * ioPromptPassword() - Read password from input h[0] with prompt to output h[1]
136: *
137: * @h = file handles h[0] = input, h[1] = output, if NULL use stdin, stdout
138: * @csPrompt = Prompt before input, may be NULL
139: * @psPass = Readed password
140: * @passLen = Length of password
141: * @confirm = Confirm password, 0 - get password, !=0 Ask for confirmation
142: * return: 0 EOF; -1 error:: can`t read; >0 count of readed chars
143: */
144: int ioPromptPassword(int *h, const char *csPrompt, char * __restrict psPass, int passLen, int confirm);
145:
146:
147: /*
148: * ioMkDir() - Function for racursive directory creation and validation
149: *
150: * @csDir = Full directory path
151: * @mode = Mode for directory creation if missing dir
152: * return: -1 error, 0 directory path exist, >0 created missing dirs
153: */
154: int ioMkDir(const char *csDir, int mode);
155:
156: /*
157: * ioWatchDirLoop() - Function for watching changes in directory and fire callback
158: *
159: * @csDir = Full directory path
160: * @callback = Callback if raise event! nOp -1 delete, 0 change/move, 1 create
161: * return: -1 error, !=-1 ok, number of total signaled events
162: */
163: int ioWatchDirLoop(const char *csDir, int (*callback)(const char *csName, int nOp));
164:
165:
166: #ifdef AIO_OPS
167: /*
168: * io_aiobulk() - AIO bulk R/W function
169: *
170: * @mode = Bulk wait mode
171: * @acbs = List of aiocb structures
172: * @nacb = Number of aiocb in list
173: * @sig = Event for completed operations, may be =NULL
174: * return: -1 error or 0 ok
175: */
176: int io_aiobulk(int mode, struct aiocb ** __restrict acbs, int nacb,
177: struct sigevent *sig);
178: #endif
179: /*
180: * io_rreadv() - Raw VFS bulk read function
181: *
182: * @fd = File handle
183: * @bufs = Read buffers
184: * @nbufs = Number of read buffers
185: * @offset = Read from position, if -1 read nbytes from current position
186: * @update = Update file handle position !0
187: * return: -1 error or !=-1 readed bytes
188: */
189: int io_rreadv(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
190: int update);
191: /*
192: * io_rwritev() - Raw VFS bulk write function
193: *
194: * @fd = File handle
195: * @bufs = Write buffers
196: * @nbufs = Number of write buffers
197: * @offset = Write to position, if -1 write nbytes to current position
198: * @update = Update file handle position !0
199: * return: -1 error or !=-1 written bytes
200: */
201: int io_rwritev(int fd, struct iovec * __restrict bufs, int nbufs, off_t offset,
202: int update);
203: /*
204: * io_rread() - Raw VFS read function
205: *
206: * @fd = File handle
207: * @buf = Read buffer
208: * @nbytes = Read buffer size
209: * @offset = Read from position, if -1 read nbytes from current position
210: * @update = Update file handle position !0
211: * return: -1 error or !=-1 readed bytes
212: */
213: int io_rread(int fd, void * __restrict buf, size_t nbytes, off_t offset,
214: int update);
215: /*
216: * io_rwrite() - Raw VFS write function
217: *
218: * @fd = File handle
219: * @buf = Write buffer
220: * @nbytes = Write bytes from buffer
221: * @offset = Write at position, if -1 write nbytes from current position
222: * @update = Update file handle position !0
223: * return: -1 error or !=-1 written bytes
224: */
225: int io_rwrite(int fd, void * __restrict buf, size_t nbytes, off_t offset,
226: int update);
227:
228: /* Disk I/O helper macros */
229: #define io_read(f, b, n) io_rread(f, b, n, -1, 1)
230: #define io_write(f, b, n) io_rwrite(f, b, n, -1, 1)
231:
232:
233: /* Crypto framework */
234:
235: /*
236: * ioCipher() - Cipher wrapper for all supported crypto algorythms
237: *
238: * @pInput = input buffer
239: * @inLen = input buffer len
240: * @ppOutput = output allocated buffe, must be e_free after use
241: * @Cipher = cipher engine, like EVP_bf_cbc() or etc...
242: * @pKey = key
243: * @pIV = IV, salt (8 bytes)
244: * @nMode = Mode 0 - decrypting or 1 - encrypting
245: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
246: */
247: int ioCipher(unsigned char *pInput, int inLen, unsigned char **ppOutput, const EVP_CIPHER *Cipher,
248: unsigned char *pKey, unsigned char *pIV, int nMode);
249:
250: /*
251: * io_Blowfish() - Blowfish cipher algorythm, work with ASCII hex strings
252: *
253: * @pInput = input buffer
254: * @inLen = input buffer len
255: * @ppOutput = output allocated buffe, must be e_free after use
256: * @pKey = key
257: * @pIV = IV, salt (8 bytes)
258: * @nMode = Mode 0 - decrypting or 1 - encrypting
259: * return: 0 not present data or error!; >0 number of processed and returned bytes into ppOutput
260: */
261: int io_Blowfish(unsigned char *pInput, int inLen, unsigned char **ppOutput,
262: unsigned char *pKey, unsigned char *pIV, int nMode);
263: /*
264: * io_ctr_AES() - Encrypt/Decrypt stream cipher CTR_AES
265: *
266: * @pInput = Input buffer with ASCII
267: * @inLen = Input buffer data length
268: * @ppOutput = Output buffer with cipher data, must be e_free after use
269: * @pKey = Key
270: * @IV = IVector/Nonce/Counter, Warning: IV must be variable, because we write there!!!
271: * return: -1 error or >-1 how many cipher blocks proceeded
272: */
273: int io_ctr_AES(unsigned char *pInput, int inLen, unsigned char **ppOutput,
274: unsigned char *pKey, unsigned char IV[AES_BLOCK_SIZE]);
275:
276:
277: /*
278: * ioAllocPTY() - Allocate new PTY and TTY
279: *
280: * @ptyfd = master fd, pty
281: * @ttyfd = slave fd, tty
282: * @name = tty device name if not null
283: * @namesiz = name length, must be above 63 bytes.
284: * @term = termios for terminal
285: * @winz = winsize for terminal
286: * return: -1 error or 0 ok
287: */
288: int ioAllocPTY(int *ptyfd, int *ttyfd, char * __restrict name, int namesiz,
289: struct termios * __restrict term, struct winsize * __restrict winz);
290: /*
291: * ioFreePTY() - Release PTY and TTY device
292: *
293: * @ptyfd = master fd, pty (==-1 skip closing pty)
294: * @ttyname = tty filename
295: * return: none
296: */
297: void ioFreePTY(int ptyfd, const char *ttyname);
298: /*
299: * ioChgWinPTY() - Change window size of PTY
300: *
301: * @ptyfd = master fd, pty
302: * @row = row
303: * @col = col
304: * @xpxl = x pixels
305: * @ypxl = y pixels
306: * return: -1 error or 0 ok
307: */
308: int ioChgWinPTY(int ptyfd, unsigned short row, unsigned short col,
309: unsigned short xpxl, unsigned short ypxl);
310: /*
311: * ioSetOwnerTTY() - Set owner to TTY
312: *
313: * @ttyname = tty filename
314: * @UID = uid
315: * @GID = gid
316: * return: -1 error or 0 ok
317: */
318: int ioSetOwnerTTY(const char *ttyname, uid_t UID, gid_t GID);
319: /*
320: * ioSetSidTTY() - Makes the process's controlling TTY and sets it to sane modes.
321: *
322: * @ttyfd = slave fd, tty
323: * @ttyname = tty filename
324: * return: -1 error or 0 ok
325: */
326: int ioSetSidTTY(int *ttyfd, const char *ttyname);
327: /*
328: * ioSetRAWMode() - Enter into RAW mode
329: *
330: * @fd = tty fd
331: * @otio = saved old termios for later restore if !=NULL
332: * return: -1 error or 0 ok
333: */
334: int ioSetRAWMode(int fd, struct termios *otio);
335: /*
336: * ioRestoreMode() - Restore termios to tty fd
337: *
338: * @fd = tty fd
339: * @tio = termios structure for restore
340: * return: -1 error or 0 ok
341: */
342: int ioRestoreMode(int fd, struct termios tio);
343: /*
344: * ioForkPTY() - Fork new process with session leader and new TTY
345: *
346: * @ptyfd = master fd, pty
347: * @name = tty device name if not null
348: * @namesiz = name length, must be above 63 bytes.
349: * @term = termios for terminal
350: * @winz = winsize for terminal
351: * @otio = old termios structure for restore
352: * return: -1 error, 0 child process or >0 parent: pid of child
353: */
354: pid_t ioForkPTY(int *ptyfd, char * __restrict name, int namesiz, struct termios * __restrict term,
355: struct winsize * __restrict winz, struct termios * __restrict otio);
356:
357: /*
358: * ioCreatePIDFile() - Create PID file
359: *
360: * @csName = PID filename
361: * @ifExists = !=0 if filename exists return error
362: * return: -1 error or 0 ok
363: */
364: int ioCreatePIDFile(const char *csName, int ifExists);
365:
366: /*
367: * ioSendFile() - AITNET sendfile() userland implementation, not dependant from OS
368: *
369: * @s = socket
370: * @csFile = file for send
371: * @sendLen = bytes to send, if 0 send all data
372: * @offset = start file offset
373: * @sndbuf = SO_SNDBUF value, if 0 use default
374: * return: 0 error, >0 ok, sended bytes
375: */
376: size_t ioSendFile(int s, const char *csFile, size_t sendLen, off_t offset, int sndbuf);
377: /*
378: * ioRecvFile() - Receive file from socket, fastest (zero-copy) way
379: *
380: * @s = socket
381: * @csFile = file for receive
382: * @recvLen = receive bytes
383: * @over = overwrite file if exists with mode like 0644
384: * @rcvbuf = SO_RCVBUF value, if 0 use default
385: * return: 0 error, >0 ok, received bytes
386: */
387: size_t ioRecvFile(int s, const char *csFile, size_t recvLen, int over, int rcvbuf);
388:
389: /*
390: * ioRealFileName() - Get real file name
391: *
392: * @fname = filename
393: * return: =NULL error or !=NULL real filename, should be free with e_free()
394: */
395: char *ioRealFileName(const char *fname);
396:
397: /* Buffered file access over memory block */
398:
399: /*
400: * io_fmemopen() - File buffered stream operations over memory block
401: *
402: * @base = Base address of memory block, if =NULL Infinit length(auto-grow)
403: * @basesize = Size of memory block
404: * return: NULL error or !=NULL Opened file resource
405: */
406: FILE *io_fmemopen(void ** __restrict base, off_t basesize);
407: /*
408: * io_fmapopen() - File buffered stream operations over MMAP block
409: *
410: * @csFile = Filename for MMAP, if =NULL private MMAP block
411: * @mode = File open mode
412: * @perm = If file not exists will be created with this access permissions
413: * @prot = MMAP protection
414: * @flags = MMAP mode flags
415: * @offset = Map from file offset, if csFile==NULL then this is size of MMAP private block
416: * return: NULL error or !=NULL Opened file resource
417: */
418: FILE *io_fmapopen(const char *csFile, int mode, int perm, int prot, int flags, off_t offset);
419: /*
420: * io_fd2buf() - Convert open file handle to buffered file I/O
421: *
422: * @fd = File handle
423: * @mode = Permissions for new buffered file I/O
424: * return: NULL error or open buffered file
425: */
426: FILE *io_fd2buf(int fd, const char *mode);
427: /*
428: * io_dumbFile() - Create empry or dumb file with fixed size
429: *
430: * @csFile = Filename for create
431: * @mode = File access permissions
432: * @size = File size
433: * return: -1 error or open file handle
434: */
435: int io_dumbFile(const char *csFile, int mode, off_t size);
436:
437:
438: /*
439: * io_get1stiface() - Get first interface of host
440: *
441: * @szIface = interface string buffer
442: * @iflen = size of interface buffer
443: * return: -1 error or 0 ok
444: */
445: int io_get1stiface(char *szIface, int iflen);
446: /*
447: * io_etherOpen() - Open BPF interface to device
448: *
449: * @csIface = interface name
450: * @flags = open flags
451: * @whdr = with complete headers
452: * @wdlt = with data link type
453: * @buflen = buffer length
454: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
455: * return: -1 error or >-1 bpf handle
456: */
457: int io_etherOpen(const char *csIface, int flags, int whdr, int wdlt,
458: unsigned int *buflen, void **zcbuf);
459: /*
460: * io_etherClose() - Close BPF interface
461: *
462: * @eth = bpf handle
463: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
464: * return: none
465: */
466: void io_etherClose(int eth, void **zcbuf);
467:
468: /*
469: * io_etherSend() - Send packet to bpf
470: *
471: * @eth = bpf handle
472: * @buf = buffer
473: * @buflen = buffer length
474: * return: -1 error or !=-1 written bytes
475: */
476: ssize_t io_etherSend(int eth, const void *buf, size_t buflen);
477: /*
478: * io_etherRecv() - Receive packet from bpf
479: *
480: * @eth = bpf handle
481: * @buf = buffer
482: * @buflen = buffer length
483: * @zcbuf = zero copy buffer, if BPF supports it and isn't NULL
484: * return: -1 error or !=-1 readed bytes
485: */
486: ssize_t io_etherRecv(int eth, void * __restrict buf,
487: size_t buflen, void * __restrict zcbuf);
488:
489:
490: #endif
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