Commit | Line | Data |
---|---|---|
f0bbedf7 FT |
1 | /* |
2 | ashd - A Sane HTTP Daemon | |
3 | Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com> | |
4 | ||
5 | This program is free software: you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation, either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | #include <stdlib.h> | |
20 | #include <unistd.h> | |
21 | #include <stdio.h> | |
d341283f | 22 | #include <fcntl.h> |
f4cdf919 | 23 | #include <string.h> |
f4cdf919 | 24 | #include <sys/socket.h> |
f0cbd8d7 | 25 | #include <pwd.h> |
15fa3fe8 | 26 | #include <sys/signal.h> |
f4cdf919 | 27 | #include <errno.h> |
f0bbedf7 FT |
28 | |
29 | #ifdef HAVE_CONFIG_H | |
30 | #include <config.h> | |
31 | #endif | |
32 | #include <utils.h> | |
f4cdf919 | 33 | #include <mt.h> |
83723896 | 34 | #include <mtio.h> |
f4cdf919 | 35 | #include <log.h> |
66987955 | 36 | #include <req.h> |
9d87a119 | 37 | #include <proc.h> |
f4cdf919 | 38 | |
8774c31b | 39 | #include "htparser.h" |
f4cdf919 | 40 | |
8774c31b | 41 | static int plex; |
43c58ba2 | 42 | static char *pidfile = NULL; |
d341283f | 43 | static int daemonize, usesyslog; |
f4cdf919 | 44 | |
df431d1d FT |
45 | static void trimx(struct hthead *req) |
46 | { | |
47 | int i; | |
48 | ||
49 | i = 0; | |
50 | while(i < req->noheaders) { | |
51 | if(!strncasecmp(req->headers[i][0], "x-ash-", 6)) { | |
52 | free(req->headers[i][0]); | |
53 | free(req->headers[i][1]); | |
54 | free(req->headers[i]); | |
55 | memmove(req->headers + i, req->headers + i + 1, sizeof(*req->headers) * (--req->noheaders - i)); | |
56 | } else { | |
57 | i++; | |
58 | } | |
59 | } | |
60 | } | |
61 | ||
5fc1bf9f | 62 | static struct hthead *parsereq(FILE *in) |
66987955 | 63 | { |
5fc1bf9f FT |
64 | struct hthead *req; |
65 | struct charbuf method, url, ver; | |
66 | int c; | |
66987955 | 67 | |
5fc1bf9f FT |
68 | req = NULL; |
69 | bufinit(method); | |
70 | bufinit(url); | |
71 | bufinit(ver); | |
72 | while(1) { | |
73 | c = getc(in); | |
74 | if(c == ' ') { | |
75 | break; | |
76 | } else if((c == EOF) || (c < 32) || (c >= 128)) { | |
77 | goto fail; | |
78 | } else { | |
79 | bufadd(method, c); | |
66987955 | 80 | } |
c9955b14 | 81 | } |
c9955b14 | 82 | while(1) { |
5fc1bf9f FT |
83 | c = getc(in); |
84 | if(c == ' ') { | |
c9955b14 | 85 | break; |
5fc1bf9f FT |
86 | } else if((c == EOF) || (c < 32)) { |
87 | goto fail; | |
88 | } else { | |
89 | bufadd(url, c); | |
66987955 FT |
90 | } |
91 | } | |
66987955 | 92 | while(1) { |
5fc1bf9f FT |
93 | c = getc(in); |
94 | if(c == 10) { | |
66987955 | 95 | break; |
5fc1bf9f FT |
96 | } else if(c == 13) { |
97 | } else if((c == EOF) || (c < 32) || (c >= 128)) { | |
c9955b14 | 98 | goto fail; |
5fc1bf9f FT |
99 | } else { |
100 | bufadd(ver, c); | |
101 | } | |
66987955 | 102 | } |
5fc1bf9f FT |
103 | bufadd(method, 0); |
104 | bufadd(url, 0); | |
105 | bufadd(ver, 0); | |
106 | req = mkreq(method.b, url.b, ver.b); | |
107 | if(parseheaders(req, in)) | |
108 | goto fail; | |
df431d1d | 109 | trimx(req); |
5fc1bf9f | 110 | goto out; |
c9955b14 FT |
111 | |
112 | fail: | |
5fc1bf9f FT |
113 | if(req != NULL) { |
114 | freehthead(req); | |
115 | req = NULL; | |
116 | } | |
117 | out: | |
118 | buffree(method); | |
119 | buffree(url); | |
120 | buffree(ver); | |
121 | return(req); | |
66987955 FT |
122 | } |
123 | ||
5fc1bf9f | 124 | static struct hthead *parseresp(FILE *in) |
9d87a119 | 125 | { |
5fc1bf9f | 126 | struct hthead *req; |
9d87a119 | 127 | int code; |
5fc1bf9f FT |
128 | struct charbuf ver, msg; |
129 | int c; | |
9d87a119 | 130 | |
5fc1bf9f FT |
131 | req = NULL; |
132 | bufinit(ver); | |
133 | bufinit(msg); | |
134 | code = 0; | |
9d87a119 | 135 | while(1) { |
5fc1bf9f FT |
136 | c = getc(in); |
137 | if(c == ' ') { | |
9d87a119 | 138 | break; |
5fc1bf9f | 139 | } else if((c == EOF) || (c < 32) || (c >= 128)) { |
9d87a119 | 140 | goto fail; |
5fc1bf9f FT |
141 | } else { |
142 | bufadd(ver, c); | |
143 | } | |
144 | } | |
145 | while(1) { | |
146 | c = getc(in); | |
147 | if(c == ' ') { | |
148 | break; | |
149 | } else if((c == EOF) || (c < '0') || (c > '9')) { | |
9d87a119 | 150 | goto fail; |
5fc1bf9f FT |
151 | } else { |
152 | code = (code * 10) + (c - '0'); | |
153 | } | |
154 | } | |
155 | while(1) { | |
156 | c = getc(in); | |
157 | if(c == 10) { | |
158 | break; | |
159 | } else if(c == 13) { | |
160 | } else if((c == EOF) || (c < 32)) { | |
9d87a119 | 161 | goto fail; |
5fc1bf9f FT |
162 | } else { |
163 | bufadd(msg, c); | |
164 | } | |
9d87a119 | 165 | } |
5fc1bf9f FT |
166 | bufadd(msg, 0); |
167 | bufadd(ver, 0); | |
168 | req = mkresp(code, msg.b, ver.b); | |
169 | if(parseheaders(req, in)) | |
170 | goto fail; | |
171 | goto out; | |
9d87a119 FT |
172 | |
173 | fail: | |
5fc1bf9f FT |
174 | if(req != NULL) { |
175 | freehthead(req); | |
176 | req = NULL; | |
177 | } | |
178 | out: | |
179 | buffree(msg); | |
180 | buffree(ver); | |
181 | return(req); | |
9d87a119 FT |
182 | } |
183 | ||
5fc1bf9f | 184 | static off_t passdata(FILE *in, FILE *out, off_t max) |
9d87a119 | 185 | { |
5fc1bf9f FT |
186 | size_t read; |
187 | off_t total; | |
188 | char buf[8192]; | |
189 | ||
190 | total = 0; | |
f9255ddd | 191 | while(!feof(in) && ((max < 0) || (total < max))) { |
5fc1bf9f FT |
192 | read = sizeof(buf); |
193 | if(max >= 0) | |
a701d7b7 | 194 | read = min(max - total, read); |
5fc1bf9f FT |
195 | read = fread(buf, 1, read, in); |
196 | if(ferror(in)) | |
197 | return(-1); | |
198 | if(fwrite(buf, 1, read, out) != read) | |
199 | return(-1); | |
200 | total += read; | |
9d87a119 | 201 | } |
5fc1bf9f FT |
202 | return(total); |
203 | } | |
204 | ||
205 | static int passchunks(FILE *in, FILE *out) | |
206 | { | |
207 | char buf[8192]; | |
208 | size_t read; | |
209 | ||
210 | do { | |
211 | read = fread(buf, 1, sizeof(buf), in); | |
212 | if(ferror(in)) | |
213 | return(-1); | |
f9255ddd | 214 | fprintf(out, "%zx\r\n", read); |
5fc1bf9f FT |
215 | if(fwrite(buf, 1, read, out) != read) |
216 | return(-1); | |
217 | fprintf(out, "\r\n"); | |
218 | } while(read > 0); | |
219 | return(0); | |
220 | } | |
221 | ||
222 | static int hasheader(struct hthead *head, char *name, char *val) | |
223 | { | |
224 | char *hd; | |
225 | ||
226 | if((hd = getheader(head, name)) == NULL) | |
227 | return(0); | |
228 | return(!strcasecmp(hd, val)); | |
9d87a119 FT |
229 | } |
230 | ||
8774c31b | 231 | void serve(FILE *in, struct conn *conn) |
66987955 | 232 | { |
af34331c | 233 | int pfds[2]; |
8774c31b | 234 | FILE *out; |
9d87a119 | 235 | struct hthead *req, *resp; |
5fc1bf9f FT |
236 | char *hd, *p; |
237 | off_t dlen; | |
66987955 | 238 | |
5fc1bf9f | 239 | out = NULL; |
3c296bd4 | 240 | req = resp = NULL; |
66987955 | 241 | while(1) { |
5fc1bf9f FT |
242 | if((req = parsereq(in)) == NULL) |
243 | break; | |
244 | replrest(req, req->url); | |
9e9eca79 FT |
245 | if(req->rest[0] == '/') |
246 | replrest(req, req->rest + 1); | |
edad3c6a FT |
247 | if((p = strchr(req->rest, '?')) != NULL) |
248 | *p = 0; | |
9d87a119 | 249 | |
8774c31b FT |
250 | if((conn->initreq != NULL) && conn->initreq(conn, req)) |
251 | break; | |
252 | ||
46c3d430 | 253 | if(block(plex, EV_WRITE, 60) <= 0) |
5fc1bf9f | 254 | break; |
af34331c | 255 | if(socketpair(PF_UNIX, SOCK_STREAM, 0, pfds)) |
5fc1bf9f | 256 | break; |
af34331c | 257 | if(sendreq(plex, req, pfds[0])) |
5fc1bf9f | 258 | break; |
af34331c | 259 | close(pfds[0]); |
5fc1bf9f | 260 | out = mtstdopen(pfds[1], 1, 600, "r+"); |
a0327573 | 261 | |
a0327573 FT |
262 | if((hd = getheader(req, "content-length")) != NULL) { |
263 | dlen = atoo(hd); | |
a06a2fbd | 264 | if(dlen > 0) { |
5fc1bf9f FT |
265 | if(passdata(in, out, dlen) != dlen) |
266 | break; | |
a06a2fbd | 267 | } |
a0327573 | 268 | } |
5fc1bf9f FT |
269 | if(fflush(out)) |
270 | break; | |
d93d9a05 | 271 | /* Make sure to send EOF */ |
5fc1bf9f | 272 | shutdown(pfds[1], SHUT_WR); |
9d87a119 | 273 | |
f9255ddd FT |
274 | if((resp = parseresp(out)) == NULL) |
275 | break; | |
5fc1bf9f | 276 | replstr(&resp->ver, req->ver); |
1c3e0167 FT |
277 | |
278 | if(!getheader(resp, "server")) | |
279 | headappheader(resp, "Server", sprintf3("ashd/%s", VERSION)); | |
5fc1bf9f FT |
280 | |
281 | if(!strcmp(req->ver, "HTTP/1.0")) { | |
282 | writeresp(in, resp); | |
283 | fprintf(in, "\r\n"); | |
18fb436d FT |
284 | if(!strcasecmp(req->method, "head")) { |
285 | if(!hasheader(req, "connection", "keep-alive")) | |
286 | break; | |
287 | } else if((hd = getheader(resp, "content-length")) != NULL) { | |
5226f7c5 FT |
288 | dlen = atoo(hd); |
289 | if(passdata(out, in, dlen) != dlen) | |
5fc1bf9f FT |
290 | break; |
291 | if(!hasheader(req, "connection", "keep-alive")) | |
9d87a119 | 292 | break; |
5fc1bf9f FT |
293 | } else { |
294 | passdata(out, in, -1); | |
295 | break; | |
9d87a119 | 296 | } |
5fc1bf9f FT |
297 | if(hasheader(req, "connection", "close") || hasheader(resp, "connection", "close")) |
298 | break; | |
299 | } else if(!strcmp(req->ver, "HTTP/1.1")) { | |
18fb436d FT |
300 | if(!strcasecmp(req->method, "head")) { |
301 | writeresp(in, resp); | |
302 | fprintf(in, "\r\n"); | |
303 | } else if((hd = getheader(resp, "content-length")) != NULL) { | |
5fc1bf9f FT |
304 | writeresp(in, resp); |
305 | fprintf(in, "\r\n"); | |
5226f7c5 FT |
306 | dlen = atoo(hd); |
307 | if(passdata(out, in, dlen) != dlen) | |
5fc1bf9f FT |
308 | break; |
309 | } else if(!getheader(resp, "transfer-encoding")) { | |
310 | headappheader(resp, "Transfer-Encoding", "chunked"); | |
311 | writeresp(in, resp); | |
312 | fprintf(in, "\r\n"); | |
313 | if(passchunks(out, in)) | |
314 | break; | |
315 | } else { | |
316 | writeresp(in, resp); | |
317 | fprintf(in, "\r\n"); | |
318 | passdata(out, in, -1); | |
9d87a119 | 319 | break; |
5fc1bf9f FT |
320 | } |
321 | if(hasheader(req, "connection", "close") || hasheader(resp, "connection", "close")) | |
9d87a119 | 322 | break; |
5fc1bf9f FT |
323 | } else { |
324 | break; | |
9d87a119 | 325 | } |
5fc1bf9f FT |
326 | |
327 | fclose(out); | |
328 | out = NULL; | |
9d87a119 | 329 | freehthead(req); |
9d87a119 | 330 | freehthead(resp); |
5fc1bf9f | 331 | req = resp = NULL; |
66987955 FT |
332 | } |
333 | ||
5fc1bf9f FT |
334 | if(out != NULL) |
335 | fclose(out); | |
9d87a119 FT |
336 | if(req != NULL) |
337 | freehthead(req); | |
338 | if(resp != NULL) | |
339 | freehthead(resp); | |
5fc1bf9f | 340 | fclose(in); |
66987955 FT |
341 | } |
342 | ||
32e24c19 FT |
343 | static void plexwatch(struct muth *muth, va_list args) |
344 | { | |
345 | vavar(int, fd); | |
346 | char *buf; | |
347 | int ret; | |
348 | ||
349 | while(1) { | |
350 | block(fd, EV_READ, 0); | |
351 | buf = smalloc(65536); | |
352 | ret = recv(fd, buf, 65536, 0); | |
353 | if(ret < 0) { | |
354 | flog(LOG_WARNING, "received error on rootplex read channel: %s", strerror(errno)); | |
355 | exit(1); | |
356 | } else if(ret == 0) { | |
357 | exit(0); | |
358 | } | |
359 | /* Maybe I'd like to implement some protocol in this direction | |
360 | * some day... */ | |
361 | free(buf); | |
362 | } | |
363 | } | |
364 | ||
d341283f FT |
365 | static void initroot(void *uu) |
366 | { | |
367 | int fd; | |
368 | ||
369 | if(daemonize) { | |
370 | setsid(); | |
371 | chdir("/"); | |
372 | if((fd = open("/dev/null", O_RDWR)) >= 0) { | |
373 | dup2(fd, 0); | |
374 | dup2(fd, 1); | |
375 | dup2(fd, 2); | |
376 | close(fd); | |
377 | } | |
378 | } | |
379 | if(usesyslog) | |
380 | putenv("ASHD_USESYSLOG=1"); | |
381 | else | |
382 | unsetenv("ASHD_USESYSLOG"); | |
383 | } | |
384 | ||
8774c31b FT |
385 | static void usage(FILE *out) |
386 | { | |
43c58ba2 | 387 | fprintf(out, "usage: htparser [-hSf] [-u USER] [-r ROOT] [-p PIDFILE] PORTSPEC... -- ROOT [ARGS...]\n"); |
8774c31b | 388 | fprintf(out, "\twhere PORTSPEC is HANDLER[:PAR[=VAL][(,PAR[=VAL])...]] (try HANDLER:help)\n"); |
6ca53b2e | 389 | fprintf(out, "\tavailable handlers are `plain' and `ssl'.\n"); |
8774c31b FT |
390 | } |
391 | ||
392 | static void addport(char *spec) | |
393 | { | |
394 | char *nm, *p, *p2, *n; | |
395 | struct charvbuf pars, vals; | |
396 | ||
397 | bufinit(pars); | |
398 | bufinit(vals); | |
399 | if((p = strchr(spec, ':')) == NULL) { | |
400 | nm = spec; | |
401 | } else { | |
402 | nm = spec; | |
403 | *(p++) = 0; | |
404 | do { | |
405 | if((n = strchr(p, ',')) != NULL) | |
406 | *(n++) = 0; | |
407 | if((p2 = strchr(p, '=')) != NULL) | |
408 | *(p2++) = 0; | |
409 | if(!*p) { | |
410 | usage(stderr); | |
411 | exit(1); | |
412 | } | |
413 | bufadd(pars, p); | |
414 | if(p2) | |
415 | bufadd(vals, p2); | |
416 | else | |
417 | bufadd(vals, ""); | |
418 | } while((p = n) != NULL); | |
419 | } | |
420 | ||
421 | /* XXX: It would be nice to decentralize this, but, meh... */ | |
422 | if(!strcmp(nm, "plain")) { | |
423 | handleplain(pars.d, pars.b, vals.b); | |
6ca53b2e FT |
424 | #ifdef HAVE_GNUTLS |
425 | } else if(!strcmp(nm, "ssl")) { | |
426 | handlegnussl(pars.d, pars.b, vals.b); | |
427 | #endif | |
8774c31b FT |
428 | } else { |
429 | flog(LOG_ERR, "htparser: unknown port handler `%s'", nm); | |
430 | exit(1); | |
431 | } | |
432 | ||
433 | buffree(pars); | |
434 | buffree(vals); | |
435 | } | |
436 | ||
f0bbedf7 FT |
437 | int main(int argc, char **argv) |
438 | { | |
8774c31b FT |
439 | int c; |
440 | int i, s1; | |
f0cbd8d7 | 441 | char *root; |
43c58ba2 | 442 | FILE *pidout; |
f0cbd8d7 | 443 | struct passwd *pwent; |
f4cdf919 | 444 | |
d341283f | 445 | daemonize = usesyslog = 0; |
f0cbd8d7 FT |
446 | root = NULL; |
447 | pwent = NULL; | |
43c58ba2 | 448 | while((c = getopt(argc, argv, "+hSfu:r:p:")) >= 0) { |
8774c31b FT |
449 | switch(c) { |
450 | case 'h': | |
451 | usage(stdout); | |
452 | exit(0); | |
f0cbd8d7 FT |
453 | case 'f': |
454 | daemonize = 1; | |
455 | break; | |
456 | case 'S': | |
d341283f | 457 | usesyslog = 1; |
f0cbd8d7 FT |
458 | break; |
459 | case 'u': | |
460 | if((pwent = getpwnam(optarg)) == NULL) { | |
461 | flog(LOG_ERR, "could not find user %s", optarg); | |
462 | exit(1); | |
463 | } | |
464 | break; | |
465 | case 'r': | |
466 | root = optarg; | |
467 | break; | |
43c58ba2 FT |
468 | case 'p': |
469 | pidfile = optarg; | |
470 | break; | |
8774c31b FT |
471 | default: |
472 | usage(stderr); | |
473 | exit(1); | |
474 | } | |
475 | } | |
8774c31b FT |
476 | s1 = 0; |
477 | for(i = optind; i < argc; i++) { | |
478 | if(!strcmp(argv[i], "--")) | |
479 | break; | |
480 | s1 = 1; | |
481 | addport(argv[i]); | |
9d87a119 | 482 | } |
8774c31b FT |
483 | if(!s1 || (i == argc)) { |
484 | usage(stderr); | |
485 | exit(1); | |
f4cdf919 | 486 | } |
d341283f | 487 | if((plex = stdmkchild(argv + ++i, initroot, NULL)) < 0) { |
8774c31b FT |
488 | flog(LOG_ERR, "could not spawn root multiplexer: %s", strerror(errno)); |
489 | return(1); | |
f4cdf919 | 490 | } |
32e24c19 | 491 | mustart(plexwatch, plex); |
43c58ba2 FT |
492 | pidout = NULL; |
493 | if(pidfile != NULL) { | |
494 | if((pidout = fopen(pidfile, "w")) == NULL) { | |
495 | flog(LOG_ERR, "could not open %s for writing: %s", pidfile, strerror(errno)); | |
496 | return(1); | |
497 | } | |
498 | } | |
d341283f | 499 | if(usesyslog) |
f0cbd8d7 FT |
500 | opensyslog(); |
501 | if(root) { | |
502 | if(chroot(root)) { | |
503 | flog(LOG_ERR, "could not chroot to %s: %s", root, strerror(errno)); | |
504 | exit(1); | |
505 | } | |
506 | } | |
507 | if(pwent) { | |
508 | if(setgid(pwent->pw_gid)) { | |
509 | flog(LOG_ERR, "could not switch group to %i: %s", (int)pwent->pw_gid, strerror(errno)); | |
510 | exit(1); | |
511 | } | |
512 | if(setuid(pwent->pw_uid)) { | |
513 | flog(LOG_ERR, "could not switch user to %i: %s", (int)pwent->pw_uid, strerror(errno)); | |
514 | exit(1); | |
515 | } | |
516 | } | |
15fa3fe8 | 517 | signal(SIGPIPE, SIG_IGN); |
f0cbd8d7 FT |
518 | if(daemonize) { |
519 | daemon(0, 0); | |
520 | } | |
ee036f74 | 521 | if(pidout != NULL) { |
43c58ba2 | 522 | fprintf(pidout, "%i\n", getpid()); |
ee036f74 FT |
523 | fclose(pidout); |
524 | } | |
f4cdf919 FT |
525 | ioloop(); |
526 | return(0); | |
f0bbedf7 | 527 | } |