]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Copyright (C) 1996-2018 The Squid Software Foundation and contributors | |
3 | * | |
4 | * Squid software is distributed under GPLv2+ license and includes | |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
7 | */ | |
8 | ||
9 | #include "squid.h" | |
10 | ||
11 | /* | |
12 | * On some systems, FD_SETSIZE is set to something lower than the | |
13 | * actual number of files which can be opened. IRIX is one case, | |
14 | * NetBSD is another. So here we increase FD_SETSIZE to our | |
15 | * configure-discovered maximum *before* any system includes. | |
16 | */ | |
17 | #define CHANGE_FD_SETSIZE 1 | |
18 | ||
19 | /* Cannot increase FD_SETSIZE on Linux */ | |
20 | #if _SQUID_LINUX_ | |
21 | #undef CHANGE_FD_SETSIZE | |
22 | #define CHANGE_FD_SETSIZE 0 | |
23 | #endif | |
24 | ||
25 | /* Cannot increase FD_SETSIZE on FreeBSD before 2.2.0, causes select(2) | |
26 | * to return EINVAL. */ | |
27 | /* Marian Durkovic <marian@svf.stuba.sk> */ | |
28 | /* Peter Wemm <peter@spinner.DIALix.COM> */ | |
29 | #if _SQUID_FREEBSD_ | |
30 | #include <osreldate.h> | |
31 | #if __FreeBSD_version < 220000 | |
32 | #undef CHANGE_FD_SETSIZE | |
33 | #define CHANGE_FD_SETSIZE 0 | |
34 | #endif | |
35 | #endif | |
36 | ||
37 | /* Increase FD_SETSIZE if SQUID_MAXFD is bigger */ | |
38 | #if CHANGE_FD_SETSIZE && SQUID_MAXFD > DEFAULT_FD_SETSIZE | |
39 | #define FD_SETSIZE SQUID_MAXFD | |
40 | #endif | |
41 | ||
42 | #if HAVE_UNISTD_H | |
43 | #include <unistd.h> | |
44 | #endif | |
45 | #if HAVE_FCNTL_H | |
46 | #include <fcntl.h> | |
47 | #endif | |
48 | #if HAVE_STRING_H | |
49 | #include <string.h> | |
50 | #endif | |
51 | #if HAVE_STRINGS_H | |
52 | #include <strings.h> | |
53 | #endif | |
54 | #if HAVE_SIGNAL_H | |
55 | #include <signal.h> | |
56 | #endif | |
57 | #if HAVE_TIME_H | |
58 | #include <time.h> | |
59 | #endif | |
60 | #if HAVE_SYS_SOCKET_H | |
61 | #include <sys/socket.h> | |
62 | #endif | |
63 | #if HAVE_NETINET_IN_H | |
64 | #include <netinet/in.h> | |
65 | #endif | |
66 | #if HAVE_ARPA_INET_H | |
67 | #include <arpa/inet.h> | |
68 | #endif | |
69 | #if HAVE_ERRNO_H | |
70 | #include <errno.h> | |
71 | #endif | |
72 | #if HAVE_SYS_STAT_H | |
73 | #include <sys/stat.h> | |
74 | #endif | |
75 | #if HAVE_ASSERT_H | |
76 | #include <assert.h> | |
77 | #endif | |
78 | #if HAVE_NETDB_H | |
79 | #include <netdb.h> | |
80 | #endif | |
81 | #if HAVE_SYS_WAIT_H | |
82 | #include <sys/wait.h> | |
83 | #endif | |
84 | ||
85 | #define READ_BUF_SZ 4096 | |
86 | #define URL_BUF_SZ 4096 | |
87 | ||
88 | struct _thing { | |
89 | int rfd; | |
90 | int wfd; | |
91 | int state; | |
92 | pid_t pid; | |
93 | char url[URL_BUF_SZ]; | |
94 | struct _thing *next; | |
95 | }; | |
96 | typedef struct _thing thing; | |
97 | ||
98 | static thing *things = NULL; | |
99 | static fd_set R1; | |
100 | static int maxfd = 0; | |
101 | static struct timeval now; | |
102 | #if DEBUG | |
103 | static int debug = 1; | |
104 | #else | |
105 | static int debug = 0; | |
106 | #endif | |
107 | ||
108 | int | |
109 | tvSubMsec(struct timeval t1, struct timeval t2) | |
110 | { | |
111 | return (t2.tv_sec - t1.tv_sec) * 1000 + (t2.tv_usec - t1.tv_usec) / 1000; | |
112 | } | |
113 | ||
114 | static int | |
115 | get_url(const char *url) | |
116 | { | |
117 | char host[URL_BUF_SZ]; | |
118 | char path[URL_BUF_SZ]; | |
119 | char request[URL_BUF_SZ]; | |
120 | char reply[READ_BUF_SZ]; | |
121 | char *t; | |
122 | int x; | |
123 | int s; | |
124 | int nr = 0; | |
125 | struct hostent *h; | |
126 | struct sockaddr_in S; | |
127 | unsigned short port = 80; | |
128 | assert(!strncmp(url, "http://", 7)); | |
129 | strncpy(host, url + 7, URL_BUF_SZ); | |
130 | if ((t = strchr(host, '/'))) | |
131 | *t = '\0'; | |
132 | if ((t = strchr(host, ':'))) { | |
133 | *t = '\0'; | |
134 | port = (unsigned short) atoi(t + 1); | |
135 | } | |
136 | #if 0 | |
137 | if ((int) port != 80) | |
138 | return 0; | |
139 | #endif | |
140 | t = strchr(url + 7, '/'); | |
141 | strncpy(path, (t ? t : "/"), URL_BUF_SZ); | |
142 | memset(&S, '\0', sizeof(S)); | |
143 | h = gethostbyname(host); | |
144 | if (!h) | |
145 | return 0; | |
146 | memcpy(&S.sin_addr.s_addr, h->h_addr_list[0], sizeof(S.sin_addr.s_addr)); | |
147 | S.sin_port = htons(port); | |
148 | S.sin_family = AF_INET; | |
149 | if (debug) { | |
150 | char tmp[16]; | |
151 | fprintf(stderr, "%s (%s) %d %s\n", host, inet_ntop(AF_INET, &S.sin_addr,tmp,sizeof(tmp)), (int) port, path); | |
152 | } | |
153 | s = socket(PF_INET, SOCK_STREAM, 0); | |
154 | if (s < 0) { | |
155 | perror("socket"); | |
156 | return -errno; | |
157 | } | |
158 | x = connect(s, (struct sockaddr *) &S, sizeof(S)); | |
159 | if (x < 0) { | |
160 | perror(host); | |
161 | return -errno; | |
162 | } | |
163 | snprintf(request, URL_BUF_SZ, | |
164 | "GET %s HTTP/1.1\r\n" | |
165 | "Accept: */*\r\n" | |
166 | "Host: %s\r\n" | |
167 | "Connection: close\r\n" | |
168 | "\r\n", | |
169 | path, | |
170 | host); | |
171 | x = write(s, request, strlen(request)); | |
172 | if (x < 0) { | |
173 | perror("write"); | |
174 | return -errno; | |
175 | } | |
176 | do { | |
177 | x = read(s, reply, READ_BUF_SZ); | |
178 | if (x > 0) | |
179 | nr += x; | |
180 | } while (x > 0); | |
181 | close(s); | |
182 | return nr; | |
183 | } | |
184 | ||
185 | static void | |
186 | child_main_loop(void) | |
187 | { | |
188 | char buf[URL_BUF_SZ]; | |
189 | char *t; | |
190 | int n; | |
191 | struct timeval t1; | |
192 | struct timeval t2; | |
193 | if (debug) | |
194 | fprintf(stderr, "Child PID %d entering child_main_loop\n", (int) getpid()); | |
195 | setbuf(stdin, NULL); | |
196 | setbuf(stdout, NULL); | |
197 | setbuf(stderr, NULL); | |
198 | while (fgets(buf, URL_BUF_SZ, stdin)) { | |
199 | t = strchr(buf, '\n'); | |
200 | if (t == NULL) | |
201 | continue; | |
202 | *t = '\0'; | |
203 | if (strncmp(buf, "http://", 7)) | |
204 | continue; | |
205 | gettimeofday(&t1, NULL); | |
206 | n = get_url(buf); | |
207 | gettimeofday(&t2, NULL); | |
208 | printf("%d %d\n", n, tvSubMsec(t1, t2)); | |
209 | } | |
210 | } | |
211 | ||
212 | static thing * | |
213 | create_a_thing(char *argv[]) | |
214 | { | |
215 | int p2c[2]; | |
216 | int c2p[2]; | |
217 | int prfd, pwfd, crfd, cwfd; | |
218 | pid_t pid; | |
219 | thing *t; | |
220 | if (pipe(p2c) < 0) | |
221 | abort(); | |
222 | if (pipe(c2p) < 0) | |
223 | abort(); | |
224 | prfd = p2c[0]; | |
225 | cwfd = p2c[1]; | |
226 | crfd = c2p[0]; | |
227 | pwfd = c2p[1]; | |
228 | if ((pid = fork()) < 0) | |
229 | abort(); | |
230 | if (pid > 0) { /* parent */ | |
231 | /* close shared socket with child */ | |
232 | close(crfd); | |
233 | close(cwfd); | |
234 | t = calloc(1, sizeof(*t)); | |
235 | t->wfd = pwfd; | |
236 | t->rfd = prfd; | |
237 | if (pwfd > maxfd) | |
238 | maxfd = pwfd; | |
239 | if (prfd > maxfd) | |
240 | maxfd = prfd; | |
241 | t->pid = pid; | |
242 | return t; | |
243 | } | |
244 | /* child */ | |
245 | close(prfd); | |
246 | close(pwfd); | |
247 | dup2(crfd, 0); | |
248 | dup2(cwfd, 1); | |
249 | close(crfd); | |
250 | close(cwfd); | |
251 | child_main_loop(); | |
252 | exit(0); | |
253 | } | |
254 | ||
255 | static void | |
256 | create_children(char *argv[]) | |
257 | { | |
258 | thing *t; | |
259 | thing **T = &things; | |
260 | int i; | |
261 | for (i = 0; i < 20; i++) { | |
262 | t = create_a_thing(argv); | |
263 | assert(t); | |
264 | if (debug) | |
265 | fprintf(stderr, "Thing #%d on FD %d/%d\n", | |
266 | i, t->rfd, t->wfd); | |
267 | *T = t; | |
268 | T = &t->next; | |
269 | } | |
270 | } | |
271 | ||
272 | char * | |
273 | parent_read_url(void) | |
274 | { | |
275 | static char buf[URL_BUF_SZ]; | |
276 | while (fgets(buf, URL_BUF_SZ, stdin)) { | |
277 | if (strncmp(buf, "http://", 7)) | |
278 | continue; | |
279 | return buf; | |
280 | } | |
281 | return NULL; | |
282 | } | |
283 | ||
284 | static thing * | |
285 | get_idle_thing(void) | |
286 | { | |
287 | thing *t; | |
288 | thing *n = things; | |
289 | while ((t = n)) { | |
290 | n = t->next; | |
291 | if (t->state == 0) | |
292 | break; | |
293 | } | |
294 | return t; | |
295 | } | |
296 | ||
297 | static void | |
298 | dispatch(thing * t, char *url) | |
299 | { | |
300 | int x; | |
301 | char *s; | |
302 | assert(t->state == 0); | |
303 | x = write(t->wfd, url, strlen(url)); | |
304 | if (x < 0) | |
305 | perror("write"); | |
306 | if (debug) | |
307 | fprintf(stderr, "dispatched URL to thing PID %d, %d bytes\n", (int) t->pid, x); | |
308 | strncpy(t->url, url, URL_BUF_SZ); | |
309 | if ((s = strchr(t->url, '\n'))) | |
310 | *s = '\0'; | |
311 | t->state = 1; | |
312 | FD_SET(t->rfd, &R1); | |
313 | } | |
314 | ||
315 | static void | |
316 | read_reply(thing * t) | |
317 | { | |
318 | char buf[128]; | |
319 | int i; | |
320 | int x; | |
321 | int j; | |
322 | x = read(t->rfd, buf, 128); | |
323 | if (x < 0) { | |
324 | perror("read"); | |
325 | } else if (2 == sscanf(buf, "%d %d", &i, &j)) { | |
326 | gettimeofday(&now, NULL); | |
327 | printf("%d.%06d %9d %9d %s\n", (int) now.tv_sec, (int) now.tv_usec, i, j, t->url); | |
328 | } | |
329 | t->state = 0; | |
330 | FD_CLR(t->rfd, &R1); | |
331 | } | |
332 | ||
333 | static void | |
334 | parent_main_loop(void) | |
335 | { | |
336 | thing *t; | |
337 | char *url; | |
338 | fd_set R2; | |
339 | int x; | |
340 | struct timeval to; | |
341 | FD_ZERO(&R1); | |
342 | for (;;) { | |
343 | while ((t = get_idle_thing()) && (url = parent_read_url())) | |
344 | dispatch(t, url); | |
345 | R2 = R1; | |
346 | to.tv_sec = 60; | |
347 | to.tv_usec = 0; | |
348 | x = select(maxfd + 1, &R2, NULL, NULL, &to); | |
349 | if (x < 0) { | |
350 | perror("select"); | |
351 | continue; | |
352 | } else if (x == 0) { | |
353 | return; | |
354 | } | |
355 | for (t = things; t; t = t->next) { | |
356 | if (t->state != 1) | |
357 | continue; | |
358 | if (!FD_ISSET(t->rfd, &R2)) | |
359 | continue; | |
360 | read_reply(t); | |
361 | } | |
362 | } | |
363 | } | |
364 | ||
365 | static void | |
366 | sig_child(int sig) | |
367 | { | |
368 | int status; | |
369 | pid_t pid; | |
370 | do { | |
371 | pid = waitpid(-1, &status, WNOHANG); | |
372 | } while (pid > 0 || (pid < 0 && errno == EINTR)); | |
373 | signal(sig, sig_child); | |
374 | } | |
375 | ||
376 | int | |
377 | main(int argc, char *argv[]) | |
378 | { | |
379 | int i; | |
380 | signal(SIGCHLD, sig_child); | |
381 | create_children(argv); | |
382 | parent_main_loop(); | |
383 | for (i = 3; i <= maxfd; i++) | |
384 | close(i); | |
385 | sleep(1); | |
386 | } | |
387 |