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