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9b2b3ef9 KA |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2017 Kumar Abhishek <abhishek@theembeddedkitchen.net> | |
5 | * Portions of the code are adopted from scpi_tcp.c and scpi.c | |
6 | * | |
7 | * Copyright (C) 2013 Martin Ling <martin-sigrok@earth.li> | |
8 | * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com> | |
9 | * | |
10 | * This program is free software: you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation, either version 3 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
22 | */ | |
23 | ||
24 | #include <config.h> | |
25 | #ifdef _WIN32 | |
26 | #define _WIN32_WINNT 0x0501 | |
27 | #include <winsock2.h> | |
28 | #include <ws2tcpip.h> | |
29 | #endif | |
30 | #include <glib.h> | |
31 | #include <string.h> | |
32 | #include <unistd.h> | |
33 | #ifndef _WIN32 | |
34 | #include <sys/socket.h> | |
35 | #include <netinet/in.h> | |
36 | #include <arpa/inet.h> | |
37 | #include <netdb.h> | |
38 | #endif | |
39 | #include <errno.h> | |
40 | ||
41 | #include "protocol.h" | |
42 | #include "beaglelogic.h" | |
43 | ||
44 | static int beaglelogic_tcp_open(struct dev_context *devc) { | |
45 | struct addrinfo hints; | |
46 | struct addrinfo *results, *res; | |
47 | int err; | |
48 | ||
49 | memset(&hints, 0, sizeof(hints)); | |
50 | hints.ai_family = AF_UNSPEC; | |
51 | hints.ai_socktype = SOCK_STREAM; | |
52 | hints.ai_protocol = IPPROTO_TCP; | |
53 | ||
54 | err = getaddrinfo(devc->address, devc->port, &hints, &results); | |
55 | ||
56 | if (err) { | |
57 | sr_err("Address lookup failed: %s:%s: %s", devc->address, | |
58 | devc->port, gai_strerror(err)); | |
59 | return SR_ERR; | |
60 | } | |
61 | ||
62 | for (res = results; res; res = res->ai_next) { | |
63 | if ((devc->socket = socket(res->ai_family, res->ai_socktype, | |
64 | res->ai_protocol)) < 0) | |
65 | continue; | |
66 | if (connect(devc->socket, res->ai_addr, res->ai_addrlen) != 0) { | |
67 | close(devc->socket); | |
68 | devc->socket = -1; | |
69 | continue; | |
70 | } | |
71 | break; | |
72 | } | |
73 | ||
74 | freeaddrinfo(results); | |
75 | ||
76 | if (devc->socket < 0) { | |
77 | sr_err("Failed to connect to %s:%s: %s", devc->address, | |
78 | devc->port, g_strerror(errno)); | |
79 | return SR_ERR; | |
80 | } | |
81 | ||
82 | return SR_OK; | |
83 | } | |
84 | ||
85 | static int beaglelogic_tcp_send_cmd(struct dev_context *devc, | |
86 | const char *format, ...) { | |
87 | int len, out; | |
88 | va_list args, args_copy; | |
89 | char *buf; | |
90 | ||
91 | va_start(args, format); | |
92 | va_copy(args_copy, args); | |
93 | len = vsnprintf(NULL, 0, format, args_copy); | |
94 | va_end(args_copy); | |
95 | ||
96 | buf = g_malloc0(len + 2); | |
97 | vsprintf(buf, format, args); | |
98 | va_end(args); | |
99 | ||
100 | if (buf[len - 1] != '\n') | |
101 | buf[len] = '\n'; | |
102 | ||
103 | out = send(devc->socket, buf, strlen(buf), 0); | |
104 | ||
105 | if (out < 0) { | |
106 | sr_err("Send error: %s", g_strerror(errno)); | |
107 | return SR_ERR; | |
108 | } | |
109 | ||
110 | if (out < (int)strlen(buf)) { | |
111 | sr_dbg("Only sent %d/%d bytes of command: '%s'.", out, | |
112 | strlen(buf), buf); | |
113 | } | |
114 | ||
115 | sr_spew("Sent command: '%s'.", buf); | |
116 | g_free(buf); | |
117 | ||
118 | return SR_OK; | |
119 | } | |
120 | ||
121 | static int beaglelogic_tcp_read_data(struct dev_context *devc, char *buf, | |
122 | int maxlen) { | |
123 | int len; | |
124 | ||
125 | len = recv(devc->socket, buf, maxlen, 0); | |
126 | ||
127 | if (len < 0) { | |
128 | sr_err("Receive error: %s", g_strerror(errno)); | |
129 | return SR_ERR; | |
130 | } | |
131 | ||
132 | return len; | |
133 | } | |
134 | ||
f7d7ee82 KA |
135 | SR_PRIV int beaglelogic_tcp_drain(struct dev_context *devc) { |
136 | char *buf = g_malloc(1024); | |
137 | fd_set rset; | |
138 | int ret, len = 0; | |
139 | struct timeval tv; | |
140 | ||
141 | FD_ZERO(&rset); | |
142 | FD_SET(devc->socket, &rset); | |
143 | ||
144 | /* 25ms timeout */ | |
145 | tv.tv_sec = 0; | |
146 | tv.tv_usec = 25 * 1000; | |
147 | ||
148 | do { | |
149 | ret = select(devc->socket + 1, &rset, NULL, NULL, &tv); | |
150 | if (ret > 0) { | |
151 | len += beaglelogic_tcp_read_data(devc, buf, 1024); | |
152 | } | |
153 | } while (ret > 0); | |
154 | ||
155 | sr_spew("Drained %d bytes of data.", len); | |
156 | ||
157 | g_free(buf); | |
158 | return SR_OK; | |
159 | } | |
160 | ||
9b2b3ef9 KA |
161 | static int beaglelogic_tcp_get_string(struct dev_context *devc, const char *cmd, |
162 | char **tcp_resp) { | |
163 | GString *response = g_string_sized_new(1024); | |
164 | int len; | |
165 | gint64 timeout; | |
166 | ||
167 | if (cmd) { | |
168 | if (beaglelogic_tcp_send_cmd(devc, cmd) != SR_OK) { | |
169 | return SR_ERR; | |
170 | } | |
171 | } | |
172 | ||
173 | timeout = g_get_monotonic_time() + devc->read_timeout; | |
174 | len = beaglelogic_tcp_read_data(devc, response->str, | |
175 | response->allocated_len); | |
176 | ||
177 | if (len < 0) { | |
178 | g_string_free(response, TRUE); | |
179 | return SR_ERR; | |
180 | } | |
181 | ||
182 | if (len > 0) { | |
183 | g_string_set_size(response, len); | |
184 | } | |
185 | ||
186 | if (g_get_monotonic_time() > timeout) { | |
187 | sr_err("Timed out waiting for response."); | |
188 | g_string_free(response, TRUE); | |
189 | return SR_ERR_TIMEOUT; | |
190 | } | |
191 | ||
192 | /* Remove trailing newline if present */ | |
193 | if (response->len >= 1 && response->str[response->len - 1] == '\n') | |
194 | g_string_truncate(response, response->len - 1); | |
195 | ||
196 | /* Remove trailing carriage return if present */ | |
197 | if (response->len >= 1 && response->str[response->len - 1] == '\r') | |
198 | g_string_truncate(response, response->len - 1); | |
199 | ||
200 | sr_spew("Got response: '%.70s', length %" G_GSIZE_FORMAT ".", | |
201 | response->str, response->len); | |
202 | ||
203 | *tcp_resp = g_string_free(response, FALSE); | |
204 | return SR_OK; | |
205 | } | |
206 | ||
207 | static int beaglelogic_tcp_get_int(struct dev_context *devc, | |
208 | const char *cmd, int *response) { | |
209 | int ret; | |
210 | char *resp = NULL; | |
211 | ||
212 | ret = beaglelogic_tcp_get_string(devc, cmd, &resp); | |
213 | if (!resp && ret != SR_OK) | |
214 | return ret; | |
215 | ||
216 | if (sr_atoi(resp, response) == SR_OK) | |
217 | ret = SR_OK; | |
218 | else | |
219 | ret = SR_ERR_DATA; | |
220 | ||
221 | g_free(resp); | |
222 | ||
223 | return ret; | |
224 | } | |
225 | ||
226 | SR_PRIV int beaglelogic_tcp_detect(struct dev_context *devc) { | |
227 | char *resp = NULL; | |
228 | int ret; | |
229 | ||
230 | ret = beaglelogic_tcp_get_string(devc, "version", &resp); | |
231 | if (ret == SR_OK && !g_ascii_strncasecmp(resp, "BeagleLogic", 11)) | |
232 | ret = SR_OK; | |
233 | else | |
234 | ret = SR_ERR; | |
235 | ||
236 | g_free(resp); | |
237 | return ret; | |
238 | } | |
239 | ||
240 | static int beaglelogic_open(struct dev_context *devc) { | |
241 | return beaglelogic_tcp_open(devc); | |
242 | } | |
243 | ||
244 | static int beaglelogic_close(struct dev_context *devc) { | |
9b2b3ef9 KA |
245 | if (close(devc->socket) < 0) |
246 | return SR_ERR; | |
247 | ||
248 | return SR_OK; | |
249 | } | |
250 | ||
251 | static int beaglelogic_get_buffersize(struct dev_context *devc) { | |
252 | return beaglelogic_tcp_get_int(devc, "memalloc", | |
253 | (int *)&devc->buffersize); | |
254 | } | |
255 | ||
256 | static int beaglelogic_set_buffersize(struct dev_context *devc) { | |
257 | int ret; | |
258 | char *resp; | |
259 | ||
260 | beaglelogic_tcp_send_cmd(devc, "memalloc %lu", devc->buffersize); | |
261 | ret = beaglelogic_tcp_get_string(devc, NULL, &resp); | |
262 | if (ret == SR_OK && !g_ascii_strncasecmp(resp, "ok", 2)) | |
263 | ret = SR_OK; | |
264 | else | |
265 | ret = SR_ERR; | |
266 | ||
267 | g_free(resp); | |
268 | return ret; | |
269 | } | |
270 | ||
271 | static int beaglelogic_get_samplerate(struct dev_context *devc) { | |
272 | int arg, err; | |
273 | err = beaglelogic_tcp_get_int(devc, "samplerate", &arg); | |
274 | devc->cur_samplerate = arg; | |
275 | return err; | |
276 | } | |
277 | ||
278 | static int beaglelogic_set_samplerate(struct dev_context *devc) { | |
279 | int ret; | |
280 | char *resp; | |
281 | ||
282 | beaglelogic_tcp_send_cmd(devc, "samplerate %lu", | |
283 | (uint32_t)devc->cur_samplerate); | |
284 | ret = beaglelogic_tcp_get_string(devc, NULL, &resp); | |
285 | if (ret == SR_OK && !g_ascii_strncasecmp(resp, "ok", 2)) | |
286 | ret = SR_OK; | |
287 | else | |
288 | ret = SR_ERR; | |
289 | ||
290 | g_free(resp); | |
291 | return ret; | |
292 | } | |
293 | ||
294 | static int beaglelogic_get_sampleunit(struct dev_context *devc) { | |
295 | return beaglelogic_tcp_get_int(devc, "sampleunit", | |
296 | (int *)&devc->sampleunit); | |
297 | } | |
298 | ||
299 | static int beaglelogic_set_sampleunit(struct dev_context *devc) { | |
300 | int ret; | |
301 | char *resp; | |
302 | ||
303 | beaglelogic_tcp_send_cmd(devc, "sampleunit %lu", devc->sampleunit); | |
304 | ret = beaglelogic_tcp_get_string(devc, NULL, &resp); | |
305 | if (ret == SR_OK && !g_ascii_strncasecmp(resp, "ok", 2)) | |
306 | ret = SR_OK; | |
307 | else | |
308 | ret = SR_ERR; | |
309 | ||
310 | g_free(resp); | |
311 | return ret; | |
312 | } | |
313 | ||
314 | static int beaglelogic_get_triggerflags(struct dev_context *devc) { | |
315 | return beaglelogic_tcp_get_int(devc, "triggerflags", | |
316 | (int *)&devc->triggerflags); | |
317 | } | |
318 | ||
319 | static int beaglelogic_set_triggerflags(struct dev_context *devc) { | |
320 | int ret; | |
321 | char *resp; | |
322 | ||
323 | beaglelogic_tcp_send_cmd(devc, "triggerflags %lu", devc->triggerflags); | |
324 | ret = beaglelogic_tcp_get_string(devc, NULL, &resp); | |
325 | if (ret == SR_OK && !g_ascii_strncasecmp(resp, "ok", 2)) | |
326 | ret = SR_OK; | |
327 | else | |
328 | ret = SR_ERR; | |
329 | ||
330 | g_free(resp); | |
331 | return ret; | |
332 | } | |
333 | ||
334 | static int beaglelogic_get_lasterror(struct dev_context *devc) { | |
335 | devc->last_error = 0; | |
336 | return SR_OK; | |
337 | } | |
338 | ||
339 | static int beaglelogic_start(struct dev_context *devc) { | |
f7d7ee82 | 340 | beaglelogic_tcp_drain(devc); |
9b2b3ef9 KA |
341 | return beaglelogic_tcp_send_cmd(devc, "get"); |
342 | } | |
343 | ||
344 | static int beaglelogic_stop(struct dev_context *devc) { | |
345 | return beaglelogic_tcp_send_cmd(devc, "close"); | |
346 | } | |
347 | ||
348 | static int beaglelogic_get_bufunitsize(struct dev_context *devc) { | |
349 | return beaglelogic_tcp_get_int(devc, "bufunitsize", | |
350 | (int *)&devc->bufunitsize); | |
351 | } | |
352 | ||
353 | static int beaglelogic_set_bufunitsize(struct dev_context *devc) { | |
354 | int ret; | |
355 | char *resp; | |
356 | ||
357 | beaglelogic_tcp_send_cmd(devc, "bufunitsize %ld", devc->bufunitsize); | |
358 | ret = beaglelogic_tcp_get_string(devc, NULL, &resp); | |
359 | if (ret == SR_OK && !g_ascii_strncasecmp(resp, "ok", 2)) | |
360 | ret = SR_OK; | |
361 | else | |
362 | ret = SR_ERR; | |
363 | ||
364 | g_free(resp); | |
365 | return ret; | |
366 | } | |
367 | ||
368 | static int dummy(struct dev_context *devc) { | |
369 | (devc); | |
370 | return SR_ERR_NA; | |
371 | } | |
372 | ||
373 | SR_PRIV const struct beaglelogic_ops beaglelogic_tcp_ops = { | |
374 | .open = beaglelogic_open, | |
375 | .close = beaglelogic_close, | |
376 | .get_buffersize = beaglelogic_get_buffersize, | |
377 | .set_buffersize = beaglelogic_set_buffersize, | |
378 | .get_samplerate = beaglelogic_get_samplerate, | |
379 | .set_samplerate = beaglelogic_set_samplerate, | |
380 | .get_sampleunit = beaglelogic_get_sampleunit, | |
381 | .set_sampleunit = beaglelogic_set_sampleunit, | |
382 | .get_triggerflags = beaglelogic_get_triggerflags, | |
383 | .set_triggerflags = beaglelogic_set_triggerflags, | |
384 | .start = beaglelogic_start, | |
385 | .stop = beaglelogic_stop, | |
386 | .get_lasterror = beaglelogic_get_lasterror, | |
387 | .get_bufunitsize = beaglelogic_get_bufunitsize, | |
388 | .set_bufunitsize = beaglelogic_set_bufunitsize, | |
389 | .mmap = dummy, | |
390 | .munmap = dummy, | |
391 | }; |