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