]>
Commit | Line | Data |
---|---|---|
1 | #include <sys/types.h> | |
2 | #include <sys/socket.h> | |
3 | #include <arpa/inet.h> | |
4 | #include <stdio.h> | |
5 | #include <stdlib.h> | |
6 | #include <string.h> | |
7 | #include <strings.h> | |
8 | #include <unistd.h> | |
9 | #include <signal.h> | |
10 | #include <stdarg.h> | |
11 | ||
12 | #include "scope.h" | |
13 | #include "commands.h" | |
14 | ||
15 | #define TIMEOUT 4 | |
16 | ||
17 | static int send_binary(int s, char *buf, int len) | |
18 | { | |
19 | int ret; | |
20 | ||
21 | while(len > 0) { | |
22 | ret = write(s, buf, len); | |
23 | if (ret == -1) { | |
24 | perror("write"); | |
25 | return ret; | |
26 | } | |
27 | buf += ret; | |
28 | len -= ret; | |
29 | } | |
30 | ||
31 | return 0; | |
32 | } | |
33 | ||
34 | static int send_text(int s, char *fmt, ...) | |
35 | { | |
36 | va_list argp; | |
37 | char buf[4096]; | |
38 | int cnt; | |
39 | ||
40 | va_start(argp, fmt); | |
41 | cnt = vsnprintf(buf, sizeof(buf), fmt, argp); | |
42 | va_end(argp); | |
43 | ||
44 | if (cnt < 0) | |
45 | return cnt; | |
46 | ||
47 | return send_binary(s, buf, cnt); | |
48 | } | |
49 | ||
50 | static int send_command_output(int s, struct scope *sc, char *cmd) | |
51 | { | |
52 | unsigned char buf[1024*1024]; | |
53 | int res; | |
54 | ||
55 | res = sendscpi(sc, cmd, buf, sizeof(buf)); | |
56 | send_binary(s, (char*)buf, res); | |
57 | ||
58 | return res; | |
59 | } | |
60 | ||
61 | static void serve_index(int s, struct scope *sc, char *param) | |
62 | { | |
63 | send_text(s, "HTTP/1.0 200 OK\n"); | |
64 | send_text(s, "Content-type: text/html\n\n"); | |
65 | send_text(s, "<html><head><title>%s</title></head><body bgcolor=\"#ffffff\" text=\"#000000\">\n", scope_idn(sc)); | |
66 | send_text(s, "<img src=\"/cgi-bin/lcd\" height=\"234\" width=\"320\">\n"); | |
67 | send_text(s, "<br>\n"); | |
68 | ||
69 | claimscope(sc); | |
70 | update_scope_status(sc); | |
71 | ||
72 | send_text(s, "System: Language: %s, Counter: %d, Beep: %d<br>\n", | |
73 | sc->status.system.lang, | |
74 | sc->status.system.counter_enabled, | |
75 | sc->status.system.beep_enabled); | |
76 | ||
77 | send_text(s, "Keyboard: Key Lock: %d<br>\n", | |
78 | sc->status.keyboard.key_lock); | |
79 | ||
80 | send_text(s, "Acquire: Type: %s, Mode: %s, Averages: %d<br>\n", | |
81 | sc->status.acquire.type, | |
82 | sc->status.acquire.mode, | |
83 | sc->status.acquire.averages); | |
84 | ||
85 | send_text(s, "Horizontal: Mode: %s, Offset: %lg, Delayed Offset: %lg, Scale: %lg, Format: %s<br>\n", | |
86 | sc->status.timebase.mode, | |
87 | sc->status.timebase.offset, | |
88 | sc->status.timebase.delayed_offset, | |
89 | sc->status.timebase.scale, | |
90 | sc->status.timebase.format); | |
91 | ||
92 | send_text(s, "Display: "); | |
93 | send_command_output(s, sc, ":DISP:TYPE?"); | |
94 | send_text(s, ", "); | |
95 | send_command_output(s, sc, ":DISP:SCR?"); | |
96 | send_text(s, ", Grid: "); | |
97 | send_command_output(s, sc, ":DISP:GRID?"); | |
98 | send_text(s, ", Persistence: "); | |
99 | send_command_output(s, sc, ":DISP:PERS?"); | |
100 | send_text(s, ", Menu: "); | |
101 | send_command_output(s, sc, ":DISP:MNUS?"); | |
102 | send_text(s, ", Brightness: "); | |
103 | send_command_output(s, sc, ":DISP:BRIG?"); | |
104 | send_text(s, ", Intensity: "); | |
105 | send_command_output(s, sc, ":DISP:INT?"); | |
106 | send_text(s, "<br>\n"); | |
107 | ||
108 | send_text(s, "Channel 1: "); | |
109 | send_command_output(s, sc, ":CHAN1:DISP?"); | |
110 | send_text(s, ", "); | |
111 | send_command_output(s, sc, ":CHAN1:MEMD?"); | |
112 | send_text(s, " sample depth, %.10lg samples/s<br>\n", sc->status.acquire.srate_chan1); | |
113 | send_text(s, "Channel 2: "); | |
114 | send_command_output(s, sc, ":CHAN2:DISP?"); | |
115 | send_text(s, ", "); | |
116 | send_command_output(s, sc, ":CHAN2:MEMD?"); | |
117 | send_text(s, " sample depth, %.10lg samples/s<br>\n", sc->status.acquire.srate_chan2); | |
118 | ||
119 | releasescope(sc); | |
120 | ||
121 | send_text(s, sc->status.system.lang); | |
122 | ||
123 | send_text(s, "<br>\n"); | |
124 | send_text(s, "<form method=\"get\" action=\"\">\n"); | |
125 | send_text(s, "<input type=\"text\" name=\"cmd\" value=\""); | |
126 | if (param) { | |
127 | if (strncmp(param, "cmd=", 4) == 0) | |
128 | param += 4; | |
129 | ||
130 | send_text(s, param); | |
131 | } | |
132 | send_text(s, "\">\n"); | |
133 | send_text(s, "<input type=\"submit\">\n"); | |
134 | send_text(s, "</form>\n"); | |
135 | send_text(s, "<a href=\"?cmd=:RUN\">RUN</a> "); | |
136 | send_text(s, "<a href=\"?cmd=:STOP\">STOP</a> "); | |
137 | send_text(s, "<a href=\"?cmd=:FORC\">FORCE</a> "); | |
138 | if (param) { | |
139 | claimscope(sc); | |
140 | if (strchr (param, '?')) { | |
141 | send_text(s, "<pre>< "); | |
142 | send_text(s, param); | |
143 | send_text(s, "\n> "); | |
144 | send_command_output(s, sc, param); | |
145 | send_text(s, "</pre>\n"); | |
146 | } else { | |
147 | sendscpi(sc, param, NULL, 0); | |
148 | } | |
149 | releasescope(sc); | |
150 | } | |
151 | send_text(s, "</body></html>\n"); | |
152 | } | |
153 | ||
154 | static void serve_lcd(int s, struct scope *sc) | |
155 | { | |
156 | char buf[256]; | |
157 | int imglen; | |
158 | unsigned char *png; | |
159 | ||
160 | claimscope(sc); | |
161 | png = get_lcd(sc, &imglen, 0); | |
162 | releasescope(sc); | |
163 | ||
164 | if (png == NULL) | |
165 | return; | |
166 | ||
167 | ||
168 | send_text(s, "HTTP/1.0 200 OK\n"); | |
169 | send_text(s, "Content-type: image/png\n"); | |
170 | snprintf(buf, sizeof(buf), "Content-length: %u\n\n", imglen); | |
171 | send_text(s, buf); | |
172 | send_binary(s, (char*)png, imglen); | |
173 | free(png); | |
174 | } | |
175 | ||
176 | static void serve_404(int s) | |
177 | { | |
178 | send_text(s, "HTTP/1.0 404 Not found\n"); | |
179 | send_text(s, "Content-type: text/html\n\n"); | |
180 | send_text(s, "<html><head><title>404</title></head>"); | |
181 | send_text(s, "<body bgcolor=\"#ffffff\" text=\"#000000\">\n"); | |
182 | send_text(s, "<h1>404</h1>"); | |
183 | send_text(s, "</body></html>\n"); | |
184 | } | |
185 | ||
186 | int is_eor(char *buf) | |
187 | { | |
188 | int eor = 0; | |
189 | ||
190 | /* This does not completely work, when the request is split | |
191 | in multiple packets... */ | |
192 | if (strstr(buf, "\x0d\x0a\x0d\x0a")) { | |
193 | eor = 1; | |
194 | } else if (strstr(buf, "\x0a\x0a")) { | |
195 | eor = 1; | |
196 | } else if (strcmp(buf, "\x0d\x0a") == 0) { | |
197 | eor = 1; | |
198 | } else if (strcmp(buf, "\x0a") == 0) { | |
199 | eor = 1; | |
200 | } | |
201 | ||
202 | return eor; | |
203 | } | |
204 | ||
205 | ||
206 | static void parse_request(int s, struct scope *sc) | |
207 | { | |
208 | int ret; | |
209 | int eor; | |
210 | char buf[4096]; | |
211 | char file[4096]; | |
212 | const char delim[] = " \t\x0d\x0a"; | |
213 | char *saveptr; | |
214 | char *token; | |
215 | char *param = NULL; | |
216 | ||
217 | alarm(TIMEOUT); | |
218 | ret=read(s, buf, sizeof(buf)-1); | |
219 | if (ret == -1) { | |
220 | perror("read"); | |
221 | return; | |
222 | } | |
223 | buf[ret] = 0; | |
224 | ||
225 | eor = is_eor(buf); | |
226 | ||
227 | token = strtok_r(buf, delim, &saveptr); | |
228 | if (token == NULL) | |
229 | return; | |
230 | /* TODO: Only GET... */ | |
231 | token = strtok_r(NULL, delim, &saveptr); | |
232 | if (token == NULL) | |
233 | return; | |
234 | bzero(&file, sizeof(file)); | |
235 | strncpy(file, token, sizeof(file)-1); | |
236 | ||
237 | while (!eor) { | |
238 | alarm(TIMEOUT); | |
239 | ret=read(s, buf, sizeof(buf)-1); | |
240 | if (ret == -1) { | |
241 | perror("read"); | |
242 | return; | |
243 | } | |
244 | buf[ret] = 0; | |
245 | eor = is_eor(buf); | |
246 | } | |
247 | alarm(0); | |
248 | ||
249 | param = strchr(file, '?'); | |
250 | if (param) { | |
251 | *param = 0; | |
252 | param++; | |
253 | ||
254 | while ((token = strchr(param, '%')) != NULL) { | |
255 | char buf[3]; | |
256 | ||
257 | if (strlen(token+1) < 2) | |
258 | break; | |
259 | ||
260 | strncpy(buf, token+1, 3); | |
261 | buf[2] = 0; | |
262 | ||
263 | *token = (char)strtoul(buf, NULL, 16); | |
264 | memmove(token+1, token+3, strlen(token)-2); | |
265 | ||
266 | } | |
267 | while ((token = strchr(param, '+')) != NULL) { | |
268 | *token = ' '; | |
269 | } | |
270 | } | |
271 | ||
272 | if (strcmp("/", file) == 0) { | |
273 | serve_index(s, sc, param); | |
274 | } else if (strcmp("/cgi-bin/lcd", file) == 0) { | |
275 | serve_lcd(s, sc); | |
276 | } else { | |
277 | serve_404(s); | |
278 | } | |
279 | } | |
280 | ||
281 | void sighandler(int sig) | |
282 | { | |
283 | switch(sig) { | |
284 | case SIGPIPE: | |
285 | break; | |
286 | case SIGALRM: | |
287 | default: | |
288 | printf("Signal %d received\n", sig); | |
289 | break; | |
290 | } | |
291 | } | |
292 | ||
293 | int main(int argc, char **argv) | |
294 | { | |
295 | struct sigaction act; | |
296 | int sock, csock; | |
297 | int opt; | |
298 | socklen_t slen; | |
299 | struct scope *sc; | |
300 | struct sockaddr_in sin, clientsin; | |
301 | unsigned short port = 8088; | |
302 | ||
303 | sc = initscope(); | |
304 | if (sc == NULL) { | |
305 | printf("Scope not found!\n"); | |
306 | exit(EXIT_FAILURE); | |
307 | } | |
308 | ||
309 | bzero(&act, sizeof(act)); | |
310 | act.sa_handler = sighandler; | |
311 | act.sa_flags = SA_RESTART; | |
312 | if (sigaction(SIGPIPE, &act, NULL) == -1) { | |
313 | perror("sigaction"); | |
314 | exit(EXIT_FAILURE); | |
315 | } | |
316 | ||
317 | bzero(&act, sizeof(act)); | |
318 | act.sa_handler = sighandler; | |
319 | if (sigaction(SIGALRM, &act, NULL) == -1) { | |
320 | perror("sigaction"); | |
321 | exit(EXIT_FAILURE); | |
322 | } | |
323 | ||
324 | if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { | |
325 | perror("socket"); | |
326 | exit(EXIT_FAILURE); | |
327 | } | |
328 | ||
329 | if (argc == 2) { | |
330 | port=atoi(argv[1]); | |
331 | } | |
332 | ||
333 | bzero(&sin, sizeof(sin)); | |
334 | sin.sin_addr.s_addr=htonl(INADDR_ANY); | |
335 | sin.sin_family=AF_INET; | |
336 | sin.sin_port=htons(port); | |
337 | ||
338 | opt = 1; | |
339 | setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &opt,sizeof(opt)); | |
340 | ||
341 | if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) { | |
342 | perror("bind"); | |
343 | exit(EXIT_FAILURE); | |
344 | } | |
345 | ||
346 | listen(sock, 32); | |
347 | printf("Listening on Port %u\n", port); | |
348 | ||
349 | while(1) { | |
350 | bzero(&clientsin, sizeof(clientsin)); | |
351 | slen = sizeof(clientsin); | |
352 | if ((csock = accept(sock, (struct sockaddr*)&clientsin, &slen)) == -1) { | |
353 | perror("accept"); | |
354 | } | |
355 | ||
356 | parse_request(csock, sc); | |
357 | ||
358 | close(csock); | |
359 | } | |
360 | ||
361 | closescope(sc); | |
362 | return 0; | |
363 | } |