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Commit | Line | Data |
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2742510a | 1 | #include "config.h" |
2 | ||
3 | /* | |
4 | * On some systems, FD_SETSIZE is set to something lower than the | |
5 | * actual number of files which can be opened. IRIX is one case, | |
6 | * NetBSD is another. So here we increase FD_SETSIZE to our | |
7 | * configure-discovered maximum *before* any system includes. | |
8 | */ | |
9 | #define CHANGE_FD_SETSIZE 1 | |
10 | ||
11 | /* Cannot increase FD_SETSIZE on Linux */ | |
12 | #if defined(_SQUID_LINUX_) | |
13 | #undef CHANGE_FD_SETSIZE | |
14 | #define CHANGE_FD_SETSIZE 0 | |
15 | #endif | |
16 | ||
17 | /* Cannot increase FD_SETSIZE on FreeBSD before 2.2.0, causes select(2) | |
18 | * to return EINVAL. */ | |
19 | /* Marian Durkovic <marian@svf.stuba.sk> */ | |
20 | /* Peter Wemm <peter@spinner.DIALix.COM> */ | |
21 | #if defined(_SQUID_FREEBSD_) | |
22 | #include <osreldate.h> | |
23 | #if __FreeBSD_version < 220000 | |
24 | #undef CHANGE_FD_SETSIZE | |
25 | #define CHANGE_FD_SETSIZE 0 | |
26 | #endif | |
27 | #endif | |
28 | ||
29 | /* Increase FD_SETSIZE if SQUID_MAXFD is bigger */ | |
30 | #if CHANGE_FD_SETSIZE && SQUID_MAXFD > DEFAULT_FD_SETSIZE | |
31 | #define FD_SETSIZE SQUID_MAXFD | |
32 | #endif | |
33 | ||
34 | #if HAVE_UNISTD_H | |
35 | #include <unistd.h> | |
36 | #endif | |
2742510a | 37 | #if HAVE_STDIO_H |
38 | #include <stdio.h> | |
39 | #endif | |
40 | #if HAVE_FCNTL_H | |
41 | #include <fcntl.h> | |
42 | #endif | |
43 | #ifdef HAVE_STRING_H | |
44 | #include <string.h> | |
45 | #endif | |
46 | #ifdef HAVE_STRINGS_H | |
47 | #include <strings.h> | |
48 | #endif | |
2742510a | 49 | #if HAVE_SIGNAL_H |
50 | #include <signal.h> | |
51 | #endif | |
52 | #if HAVE_TIME_H | |
53 | #include <time.h> | |
54 | #endif | |
55 | #if HAVE_SYS_TIME_H | |
56 | #include <sys/time.h> | |
57 | #endif | |
58 | #if HAVE_SYS_SOCKET_H | |
59 | #include <sys/socket.h> | |
60 | #endif | |
61 | #if HAVE_NETINET_IN_H | |
62 | #include <netinet/in.h> | |
63 | #endif | |
64 | #if HAVE_ARPA_INET_H | |
65 | #include <arpa/inet.h> | |
66 | #endif | |
67 | #if HAVE_ERRNO_H | |
68 | #include <errno.h> | |
69 | #endif | |
70 | #if HAVE_SYS_STAT_H | |
71 | #include <sys/stat.h> | |
72 | #endif | |
73 | #if HAVE_ASSERT_H | |
74 | #include <assert.h> | |
75 | #endif | |
76 | #include <netdb.h> | |
77 | #include <sys/wait.h> | |
78 | ||
79 | #define READ_BUF_SZ 4096 | |
80 | #define URL_BUF_SZ 4096 | |
81 | ||
82 | struct _thing { | |
83 | int rfd; | |
84 | int wfd; | |
85 | int state; | |
86 | pid_t pid; | |
87 | char url[URL_BUF_SZ]; | |
88 | struct _thing *next; | |
89 | }; | |
90 | typedef struct _thing thing; | |
91 | ||
92 | static thing *things = NULL; | |
93 | static fd_set R1; | |
94 | static int maxfd = 0; | |
95 | static struct timeval now; | |
96 | #if DEBUG | |
97 | static int debug = 1; | |
98 | #else | |
99 | static int debug = 0; | |
100 | #endif | |
101 | ||
2327c45c | 102 | int |
103 | tvSubMsec(struct timeval t1, struct timeval t2) | |
104 | { | |
105 | return (t2.tv_sec - t1.tv_sec) * 1000 + (t2.tv_usec - t1.tv_usec) / 1000; | |
106 | } | |
107 | ||
2742510a | 108 | static int |
109 | get_url(const char *url) | |
110 | { | |
111 | char host[URL_BUF_SZ]; | |
112 | char path[URL_BUF_SZ]; | |
113 | char request[URL_BUF_SZ]; | |
114 | char reply[READ_BUF_SZ]; | |
115 | char *t; | |
116 | int x; | |
117 | int s; | |
118 | int nr = 0; | |
119 | struct hostent *h; | |
120 | struct sockaddr_in S; | |
121 | unsigned short port = 80; | |
122 | assert(!strncmp(url, "http://", 7)); | |
123 | strncpy(host, url + 7, URL_BUF_SZ); | |
124 | if ((t = strchr(host, '/'))) | |
26ac0430 | 125 | *t = '\0'; |
2742510a | 126 | if ((t = strchr(host, ':'))) { |
26ac0430 AJ |
127 | *t = '\0'; |
128 | port = (unsigned short) atoi(t + 1); | |
2742510a | 129 | } |
b6a2f15e | 130 | #if 0 |
2742510a | 131 | if ((int) port != 80) |
26ac0430 | 132 | return 0; |
b6a2f15e | 133 | #endif |
2742510a | 134 | t = strchr(url + 7, '/'); |
135 | strncpy(path, (t ? t : "/"), URL_BUF_SZ); | |
136 | memset(&S, '\0', sizeof(S)); | |
137 | h = gethostbyname(host); | |
138 | if (!h) | |
26ac0430 | 139 | return 0; |
2742510a | 140 | memcpy(&S.sin_addr.s_addr, h->h_addr_list[0], sizeof(S.sin_addr.s_addr)); |
141 | S.sin_port = htons(port); | |
142 | S.sin_family = AF_INET; | |
2f0b84f7 AJ |
143 | if (debug) { |
144 | char tmp[16]; | |
145 | fprintf(stderr, "%s (%s) %d %s\n", host, inet_ntop(AF_INET, &S.sin_addr,tmp,sizeof(tmp)), (int) port, path); | |
146 | } | |
2742510a | 147 | s = socket(PF_INET, SOCK_STREAM, 0); |
2327c45c | 148 | if (s < 0) { |
26ac0430 AJ |
149 | perror("socket"); |
150 | return -errno; | |
2327c45c | 151 | } |
2742510a | 152 | x = connect(s, (struct sockaddr *) &S, sizeof(S)); |
153 | if (x < 0) { | |
26ac0430 AJ |
154 | perror(host); |
155 | return -errno; | |
2742510a | 156 | } |
157 | snprintf(request, URL_BUF_SZ, | |
26ac0430 AJ |
158 | "GET %s HTTP/1.1\r\n" |
159 | "Accept: */*\r\n" | |
160 | "Host: %s\r\n" | |
161 | "Connection: close\r\n" | |
162 | "\r\n", | |
163 | path, | |
164 | host); | |
2742510a | 165 | x = write(s, request, strlen(request)); |
166 | if (x < 0) { | |
26ac0430 AJ |
167 | perror("write"); |
168 | return -errno; | |
2742510a | 169 | } |
170 | do { | |
26ac0430 AJ |
171 | x = read(s, reply, READ_BUF_SZ); |
172 | if (x > 0) | |
173 | nr += x; | |
2742510a | 174 | } while (x > 0); |
175 | close(s); | |
176 | return nr; | |
177 | } | |
178 | ||
179 | static void | |
180 | child_main_loop(void) | |
181 | { | |
182 | char buf[URL_BUF_SZ]; | |
183 | char *t; | |
184 | int n; | |
2327c45c | 185 | struct timeval t1; |
186 | struct timeval t2; | |
2742510a | 187 | if (debug) |
26ac0430 | 188 | fprintf(stderr, "Child PID %d entering child_main_loop\n", (int) getpid()); |
2742510a | 189 | setbuf(stdin, NULL); |
190 | setbuf(stdout, NULL); | |
191 | setbuf(stderr, NULL); | |
192 | while (fgets(buf, URL_BUF_SZ, stdin)) { | |
26ac0430 AJ |
193 | t = strchr(buf, '\n'); |
194 | if (t == NULL) | |
195 | continue; | |
196 | *t = '\0'; | |
197 | if (strncmp(buf, "http://", 7)) | |
198 | continue; | |
199 | gettimeofday(&t1, NULL); | |
200 | n = get_url(buf); | |
201 | gettimeofday(&t2, NULL); | |
202 | printf("%d %d\n", n, tvSubMsec(t1, t2)); | |
2742510a | 203 | } |
204 | } | |
205 | ||
206 | static thing * | |
207 | create_a_thing(char *argv[]) | |
208 | { | |
209 | int p2c[2]; | |
210 | int c2p[2]; | |
211 | int prfd, pwfd, crfd, cwfd; | |
212 | pid_t pid; | |
213 | thing *t; | |
214 | if (pipe(p2c) < 0) | |
26ac0430 | 215 | abort(); |
2742510a | 216 | if (pipe(c2p) < 0) |
26ac0430 | 217 | abort(); |
2742510a | 218 | prfd = p2c[0]; |
219 | cwfd = p2c[1]; | |
220 | crfd = c2p[0]; | |
221 | pwfd = c2p[1]; | |
222 | if ((pid = fork()) < 0) | |
26ac0430 | 223 | abort(); |
2742510a | 224 | if (pid > 0) { /* parent */ |
26ac0430 AJ |
225 | /* close shared socket with child */ |
226 | close(crfd); | |
227 | close(cwfd); | |
228 | t = calloc(1, sizeof(*t)); | |
229 | t->wfd = pwfd; | |
230 | t->rfd = prfd; | |
231 | if (pwfd > maxfd) | |
232 | maxfd = pwfd; | |
233 | if (prfd > maxfd) | |
234 | maxfd = prfd; | |
235 | t->pid = pid; | |
236 | return t; | |
2742510a | 237 | } |
238 | /* child */ | |
239 | close(prfd); | |
240 | close(pwfd); | |
241 | dup2(crfd, 0); | |
242 | dup2(cwfd, 1); | |
243 | close(crfd); | |
244 | close(cwfd); | |
245 | child_main_loop(); | |
246 | exit(0); | |
247 | } | |
248 | ||
249 | static void | |
250 | create_children(char *argv[]) | |
251 | { | |
252 | thing *t; | |
253 | thing **T = &things; | |
254 | int i; | |
255 | for (i = 0; i < 20; i++) { | |
26ac0430 AJ |
256 | t = create_a_thing(argv); |
257 | assert(t); | |
258 | if (debug) | |
259 | fprintf(stderr, "Thing #%d on FD %d/%d\n", | |
260 | i, t->rfd, t->wfd); | |
261 | *T = t; | |
262 | T = &t->next; | |
2742510a | 263 | } |
264 | } | |
265 | ||
266 | char * | |
267 | parent_read_url(void) | |
268 | { | |
269 | static char buf[URL_BUF_SZ]; | |
270 | while (fgets(buf, URL_BUF_SZ, stdin)) { | |
26ac0430 AJ |
271 | if (strncmp(buf, "http://", 7)) |
272 | continue; | |
273 | return buf; | |
2742510a | 274 | } |
275 | return NULL; | |
276 | } | |
277 | ||
278 | static thing * | |
279 | get_idle_thing(void) | |
280 | { | |
281 | thing *t; | |
282 | thing *n = things; | |
283 | while ((t = n)) { | |
26ac0430 AJ |
284 | n = t->next; |
285 | if (t->state == 0) | |
286 | break; | |
2742510a | 287 | } |
288 | return t; | |
289 | } | |
290 | ||
291 | static void | |
292 | dispatch(thing * t, char *url) | |
293 | { | |
294 | int x; | |
295 | char *s; | |
296 | assert(t->state == 0); | |
297 | x = write(t->wfd, url, strlen(url)); | |
298 | if (x < 0) | |
26ac0430 | 299 | perror("write"); |
2742510a | 300 | if (debug) |
26ac0430 | 301 | fprintf(stderr, "dispatched URL to thing PID %d, %d bytes\n", (int) t->pid, x); |
2742510a | 302 | strncpy(t->url, url, URL_BUF_SZ); |
303 | if ((s = strchr(t->url, '\n'))) | |
26ac0430 | 304 | *s = '\0'; |
2742510a | 305 | t->state = 1; |
306 | FD_SET(t->rfd, &R1); | |
307 | } | |
308 | ||
309 | static void | |
310 | read_reply(thing * t) | |
311 | { | |
312 | char buf[128]; | |
313 | int i; | |
314 | int x; | |
2327c45c | 315 | int j; |
2742510a | 316 | x = read(t->rfd, buf, 128); |
317 | if (x < 0) { | |
26ac0430 | 318 | perror("read"); |
2327c45c | 319 | } else if (2 == sscanf(buf, "%d %d", &i, &j)) { |
26ac0430 AJ |
320 | gettimeofday(&now, NULL); |
321 | printf("%d.%06d %9d %9d %s\n", (int) now.tv_sec, (int) now.tv_usec, i, j, t->url); | |
2742510a | 322 | } |
323 | t->state = 0; | |
324 | FD_CLR(t->rfd, &R1); | |
325 | } | |
326 | ||
327 | static void | |
328 | parent_main_loop(void) | |
329 | { | |
330 | thing *t; | |
331 | char *url; | |
332 | fd_set R2; | |
333 | int x; | |
cae16863 | 334 | struct timeval to; |
2742510a | 335 | FD_ZERO(&R1); |
336 | for (;;) { | |
26ac0430 AJ |
337 | while ((t = get_idle_thing()) && (url = parent_read_url())) |
338 | dispatch(t, url); | |
339 | R2 = R1; | |
340 | to.tv_sec = 60; | |
341 | to.tv_usec = 0; | |
342 | x = select(maxfd + 1, &R2, NULL, NULL, &to); | |
343 | if (x < 0) { | |
344 | perror("select"); | |
345 | continue; | |
346 | } else if (x == 0) { | |
347 | return; | |
348 | } | |
349 | for (t = things; t; t = t->next) { | |
350 | if (t->state != 1) | |
351 | continue; | |
352 | if (!FD_ISSET(t->rfd, &R2)) | |
353 | continue; | |
354 | read_reply(t); | |
355 | } | |
2742510a | 356 | } |
357 | } | |
358 | ||
359 | static void | |
360 | sig_child(int sig) | |
361 | { | |
362 | int status; | |
363 | pid_t pid; | |
364 | do { | |
26ac0430 | 365 | pid = waitpid(-1, &status, WNOHANG); |
2742510a | 366 | } while (pid > 0 || (pid < 0 && errno == EINTR)); |
367 | signal(sig, sig_child); | |
368 | } | |
369 | ||
370 | ||
371 | int | |
372 | main(int argc, char *argv[]) | |
373 | { | |
8d1ef8ff | 374 | int i; |
2742510a | 375 | signal(SIGCHLD, sig_child); |
376 | create_children(argv); | |
377 | parent_main_loop(); | |
468ae12b | 378 | for (i = 3; i <= maxfd; i++) |
26ac0430 | 379 | close(i); |
8d1ef8ff | 380 | sleep(1); |
2742510a | 381 | } |