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Merge pull request #969 from pwpiwi/gcc10_fixes
[proxmark3-svn] / uart / uart_posix.c
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fd667521 1/*\r
2 * Generic uart / rs232/ serial port library\r
3 *\r
4 * Copyright (c) 2013, Roel Verdult\r
5 * Copyright (c) 2018 Google\r
6 * All rights reserved.\r
7 *\r
8 * Redistribution and use in source and binary forms, with or without\r
9 * modification, are permitted provided that the following conditions are met:\r
10 * 1. Redistributions of source code must retain the above copyright\r
11 * notice, this list of conditions and the following disclaimer.\r
12 * 2. Redistributions in binary form must reproduce the above copyright\r
13 * notice, this list of conditions and the following disclaimer in the\r
14 * documentation and/or other materials provided with the distribution.\r
15 * 3. Neither the name of the copyright holders nor the\r
16 * names of its contributors may be used to endorse or promote products\r
17 * derived from this software without specific prior written permission.\r
18 *\r
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY\r
20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\r
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\r
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY\r
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\r
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\r
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\r
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\r
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
29 *\r
30 * @file uart_posix.c\r
31 *\r
32 * This version of the library has functionality removed which was not used by\r
33 * proxmark3 project.\r
34 */\r
35\r
36// Test if we are dealing with posix operating systems\r
37#ifndef _WIN32\r
38#define _DEFAULT_SOURCE\r
39\r
40#include "uart.h"\r
41\r
42#include <stdlib.h>\r
43#include <stdio.h>\r
44#include <string.h>\r
45#include <stdbool.h>\r
46#include <termios.h>\r
47#include <sys/ioctl.h>\r
48#include <unistd.h>\r
49#include <fcntl.h>\r
50#include <sys/types.h>\r
51#include <sys/stat.h>\r
52#include <sys/socket.h>\r
53#include <netinet/tcp.h>\r
54#include <netdb.h>\r
d2ca5dbf 55#include <sys/time.h>\r
56#include <errno.h>\r
fd667521 57\r
58// Fix missing definition on OS X.\r
59// Taken from https://github.com/unbit/uwsgi/commit/b608eb1772641d525bfde268fe9d6d8d0d5efde7\r
60#ifndef SOL_TCP\r
61#define SOL_TCP IPPROTO_TCP\r
62#endif\r
63\r
64typedef struct termios term_info;\r
65typedef struct {\r
66 int fd; // Serial port file descriptor\r
67 term_info tiOld; // Terminal info before using the port\r
68 term_info tiNew; // Terminal info during the transaction\r
69} serial_port_unix;\r
70\r
71// Set time-out on 30 miliseconds\r
72static struct timeval timeout = {\r
73 .tv_sec = 0, // 0 second\r
74 .tv_usec = 30000 // 30000 micro seconds\r
75};\r
76\r
77\r
78void uart_close(const serial_port sp) {\r
79 serial_port_unix* spu = (serial_port_unix*)sp;\r
d2ca5dbf 80 tcflush(spu->fd, TCIOFLUSH);\r
81 tcsetattr(spu->fd, TCSANOW, &(spu->tiOld));\r
fd667521 82 struct flock fl;\r
83 fl.l_type = F_UNLCK;\r
84 fl.l_whence = SEEK_SET;\r
85 fl.l_start = 0;\r
86 fl.l_len = 0;\r
87 fl.l_pid = getpid();\r
88 fcntl(spu->fd, F_SETLK, &fl);\r
89 close(spu->fd);\r
90 free(sp);\r
91}\r
92\r
93\r
94serial_port uart_open(const char* pcPortName) {\r
95\r
96 serial_port_unix* sp = malloc(sizeof(serial_port_unix));\r
97 if (sp == 0) return INVALID_SERIAL_PORT;\r
98\r
99 if (memcmp(pcPortName, "tcp:", 4) == 0) {\r
100 struct addrinfo *addr = NULL, *rp;\r
101 char *addrstr = strdup(pcPortName + 4);\r
102 if (addrstr == NULL) {\r
103 printf("Error: strdup\n");\r
104 return INVALID_SERIAL_PORT;\r
105 }\r
106 char *colon = strrchr(addrstr, ':');\r
107 char *portstr;\r
108\r
109 // Set time-out to 300 milliseconds only for TCP port\r
110 timeout.tv_usec = 300000;\r
111\r
112 if (colon) {\r
113 portstr = colon + 1;\r
114 *colon = '\0';\r
115 } else {\r
116 portstr = "7901";\r
117 }\r
118\r
119 struct addrinfo info;\r
120\r
121 memset(&info, 0, sizeof(info));\r
122\r
123 info.ai_socktype = SOCK_STREAM;\r
124\r
125 int s = getaddrinfo(addrstr, portstr, &info, &addr);\r
126 if (s != 0) {\r
127 printf("Error: getaddrinfo: %s\n", gai_strerror(s));\r
128 return INVALID_SERIAL_PORT;\r
129 }\r
130\r
131 int sfd;\r
132 for (rp = addr; rp != NULL; rp = rp->ai_next) {\r
133 sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);\r
134 if (sfd == -1)\r
135 continue;\r
136 if (connect(sfd, rp->ai_addr, rp->ai_addrlen) != -1)\r
137 break;\r
138 close(sfd);\r
139 }\r
140\r
141 if (rp == NULL) { /* No address succeeded */\r
142 printf("Error: Could not connect\n");\r
143 return INVALID_SERIAL_PORT;\r
144 }\r
145\r
146 freeaddrinfo(addr);\r
147 free(addrstr);\r
148\r
149 sp->fd = sfd;\r
150\r
151 int one = 1;\r
152 setsockopt(sp->fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one));\r
153 return sp;\r
154 }\r
155\r
156 sp->fd = open(pcPortName, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK);\r
157 if (sp->fd == -1) {\r
158 uart_close(sp);\r
159 return INVALID_SERIAL_PORT;\r
160 }\r
161\r
162 // Finally figured out a way to claim a serial port interface under unix\r
163 // We just try to set a (advisory) lock on the file descriptor\r
164 struct flock fl;\r
165 fl.l_type = F_WRLCK;\r
166 fl.l_whence = SEEK_SET;\r
167 fl.l_start = 0;\r
168 fl.l_len = 0;\r
169 fl.l_pid = getpid();\r
170\r
171 // Does the system allows us to place a lock on this file descriptor\r
172 if (fcntl(sp->fd, F_SETLK, &fl) == -1) {\r
173 // A conflicting lock is held by another process\r
174 free(sp);\r
175 return CLAIMED_SERIAL_PORT;\r
176 }\r
177\r
178 // Try to retrieve the old (current) terminal info struct\r
d2ca5dbf 179 if (tcgetattr(sp->fd,&sp->tiOld) == -1) {\r
fd667521 180 uart_close(sp);\r
181 return INVALID_SERIAL_PORT;\r
182 }\r
183\r
184 // Duplicate the (old) terminal info struct\r
185 sp->tiNew = sp->tiOld;\r
186\r
187 // Configure the serial port\r
d2ca5dbf 188 sp->tiNew.c_cflag &= ~(CSIZE | PARENB);\r
189 sp->tiNew.c_cflag |= (CS8 | CLOCAL | CREAD);\r
190 sp->tiNew.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);\r
191 sp->tiNew.c_iflag |= IGNPAR;\r
192 sp->tiNew.c_oflag &= ~OPOST;\r
193 sp->tiNew.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);\r
fd667521 194\r
fd667521 195\r
196 // Try to set the new terminal info struct\r
d2ca5dbf 197 if (tcsetattr(sp->fd, TCSANOW, &sp->tiNew) == -1) {\r
fd667521 198 uart_close(sp);\r
199 return INVALID_SERIAL_PORT;\r
200 }\r
201\r
202 // Flush all lingering data that may exist\r
203 tcflush(sp->fd, TCIOFLUSH);\r
204\r
205 return sp;\r
206}\r
207\r
208\r
d2ca5dbf 209bool uart_receive(const serial_port sp, uint8_t* pbtRx, size_t szMaxRxLen, size_t* pszRxLen) {\r
fd667521 210\r
fd667521 211 *pszRxLen = 0;\r
212\r
d2ca5dbf 213 if (szMaxRxLen == 0) return true;\r
fd667521 214\r
d2ca5dbf 215 struct timeval t_current;\r
216 gettimeofday(&t_current, NULL);\r
217 struct timeval t_end;\r
218 timeradd(&t_current, &timeout, &t_end);\r
fd667521 219\r
d2ca5dbf 220 while (true) {\r
221 int res = read(((serial_port_unix*)sp)->fd, pbtRx, szMaxRxLen - *pszRxLen);\r
222 if (res < 0 && errno != EAGAIN && errno != EWOULDBLOCK) return false;\r
223 if (res > 0) {\r
224 *pszRxLen += res;\r
225 pbtRx += res;\r
fd667521 226 }\r
d2ca5dbf 227 if (*pszRxLen == szMaxRxLen) return true; // we could read all requested bytes in time\r
228 gettimeofday(&t_current, NULL);\r
229 if (timercmp(&t_current, &t_end, >)) return true; // timeout\r
230 // set next select timeout\r
231 struct timeval t_remains;\r
232 timersub(&t_end, &t_current, &t_remains);\r
233 // Set the file descriptor set\r
234 fd_set rfds;\r
235 FD_ZERO(&rfds);\r
236 FD_SET(((serial_port_unix*)sp)->fd, &rfds);\r
237 // wait for more bytes available\r
238 res = select(((serial_port_unix*)sp)->fd+1, &rfds, NULL, NULL, &t_remains);\r
fd667521 239 if (res < 0) return false;\r
d2ca5dbf 240 if (res == 0) return true; // timeout\r
241 }\r
242 return true; // should never come here\r
fd667521 243}\r
244\r
245\r
246bool uart_send(const serial_port sp, const uint8_t* pbtTx, const size_t szTxLen) {\r
fd667521 247\r
d2ca5dbf 248 if (szTxLen == 0) return true;\r
fd667521 249\r
d2ca5dbf 250 size_t bytes_written = 0;\r
fd667521 251\r
d2ca5dbf 252 struct timeval t_current;\r
253 gettimeofday(&t_current, NULL);\r
254 struct timeval t_end;\r
255 timeradd(&t_current, &timeout, &t_end);\r
fd667521 256\r
d2ca5dbf 257 while (true) {\r
258 int res = write(((serial_port_unix*)sp)->fd, pbtTx, szTxLen - bytes_written);\r
259 if (res < 0 && res != EAGAIN && res != EWOULDBLOCK) return false;\r
260 if (res > 0) {\r
261 pbtTx += res;\r
262 bytes_written += res;\r
263 }\r
264 if (bytes_written == szTxLen) return true; // we could write all bytes\r
265 gettimeofday(&t_current, NULL);\r
266 if (timercmp(&t_current, &t_end, >)) return false; // timeout\r
267 // set next select timeout\r
268 struct timeval t_remains;\r
269 timersub(&t_end, &t_current, &t_remains);\r
270 // Set the file descriptor set\r
271 fd_set wfds;\r
272 FD_ZERO(&wfds);\r
273 FD_SET(((serial_port_unix*)sp)->fd, &wfds);\r
274 // wait until more bytes can be written\r
275 res = select(((serial_port_unix*)sp)->fd+1, NULL, &wfds, NULL, &t_remains);\r
276 if (res < 0) return false; // error\r
277 if (res == 0) return false; // timeout\r
fd667521 278 }\r
279 return true;\r
280}\r
281\r
282\r
283bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {\r
284 const serial_port_unix* spu = (serial_port_unix*)sp;\r
285 speed_t stPortSpeed;\r
286 switch (uiPortSpeed) {\r
287 case 0: stPortSpeed = B0; break;\r
288 case 50: stPortSpeed = B50; break;\r
289 case 75: stPortSpeed = B75; break;\r
290 case 110: stPortSpeed = B110; break;\r
291 case 134: stPortSpeed = B134; break;\r
292 case 150: stPortSpeed = B150; break;\r
293 case 300: stPortSpeed = B300; break;\r
294 case 600: stPortSpeed = B600; break;\r
295 case 1200: stPortSpeed = B1200; break;\r
296 case 1800: stPortSpeed = B1800; break;\r
297 case 2400: stPortSpeed = B2400; break;\r
298 case 4800: stPortSpeed = B4800; break;\r
299 case 9600: stPortSpeed = B9600; break;\r
300 case 19200: stPortSpeed = B19200; break;\r
301 case 38400: stPortSpeed = B38400; break;\r
302# ifdef B57600\r
303 case 57600: stPortSpeed = B57600; break;\r
304# endif\r
305# ifdef B115200\r
306 case 115200: stPortSpeed = B115200; break;\r
307# endif\r
308# ifdef B230400\r
309 case 230400: stPortSpeed = B230400; break;\r
310# endif\r
311# ifdef B460800\r
312 case 460800: stPortSpeed = B460800; break;\r
313# endif\r
314# ifdef B921600\r
315 case 921600: stPortSpeed = B921600; break;\r
316# endif\r
317 default: return false;\r
318 };\r
319 struct termios ti;\r
320 if (tcgetattr(spu->fd, &ti) == -1) return false;\r
321 // Set port speed (Input and Output)\r
322 cfsetispeed(&ti,stPortSpeed);\r
323 cfsetospeed(&ti,stPortSpeed);\r
324 return (tcsetattr(spu->fd, TCSANOW, &ti) != -1);\r
325}\r
326\r
327uint32_t uart_get_speed(const serial_port sp) {\r
328 struct termios ti;\r
329 uint32_t uiPortSpeed;\r
330 const serial_port_unix* spu = (serial_port_unix*)sp;\r
331 if (tcgetattr(spu->fd, &ti) == -1) return 0;\r
332 // Set port speed (Input)\r
333 speed_t stPortSpeed = cfgetispeed(&ti);\r
334 switch (stPortSpeed) {\r
335 case B0: uiPortSpeed = 0; break;\r
336 case B50: uiPortSpeed = 50; break;\r
337 case B75: uiPortSpeed = 75; break;\r
338 case B110: uiPortSpeed = 110; break;\r
339 case B134: uiPortSpeed = 134; break;\r
340 case B150: uiPortSpeed = 150; break;\r
341 case B300: uiPortSpeed = 300; break;\r
342 case B600: uiPortSpeed = 600; break;\r
343 case B1200: uiPortSpeed = 1200; break;\r
344 case B1800: uiPortSpeed = 1800; break;\r
345 case B2400: uiPortSpeed = 2400; break;\r
346 case B4800: uiPortSpeed = 4800; break;\r
347 case B9600: uiPortSpeed = 9600; break;\r
348 case B19200: uiPortSpeed = 19200; break;\r
349 case B38400: uiPortSpeed = 38400; break;\r
350# ifdef B57600\r
351 case B57600: uiPortSpeed = 57600; break;\r
352# endif\r
353# ifdef B115200\r
354 case B115200: uiPortSpeed = 115200; break;\r
355# endif\r
356# ifdef B230400\r
357 case B230400: uiPortSpeed = 230400; break;\r
358# endif\r
359# ifdef B460800\r
360 case B460800: uiPortSpeed = 460800; break;\r
361# endif\r
362# ifdef B921600\r
363 case B921600: uiPortSpeed = 921600; break;\r
364# endif\r
365 default: return 0;\r
366 };\r
367 return uiPortSpeed;\r
368}\r
369\r
370#endif\r
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