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 FT |
23 | #include <sys/socket.h> |
24 | #include <netinet/in.h> | |
9d87a119 | 25 | #include <arpa/inet.h> |
f4cdf919 | 26 | #include <errno.h> |
f0bbedf7 FT |
27 | |
28 | #ifdef HAVE_CONFIG_H | |
29 | #include <config.h> | |
30 | #endif | |
31 | #include <utils.h> | |
f4cdf919 | 32 | #include <mt.h> |
83723896 | 33 | #include <mtio.h> |
f4cdf919 | 34 | #include <log.h> |
66987955 | 35 | #include <req.h> |
9d87a119 | 36 | #include <proc.h> |
f4cdf919 | 37 | |
83723896 | 38 | static int plex; |
f4cdf919 FT |
39 | |
40 | static int listensock4(int port) | |
41 | { | |
42 | struct sockaddr_in name; | |
43 | int fd; | |
44 | int valbuf; | |
45 | ||
46 | memset(&name, 0, sizeof(name)); | |
47 | name.sin_family = AF_INET; | |
48 | name.sin_port = htons(port); | |
49 | if((fd = socket(PF_INET, SOCK_STREAM, 0)) < 0) | |
50 | return(-1); | |
51 | valbuf = 1; | |
52 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &valbuf, sizeof(valbuf)); | |
53 | if(bind(fd, (struct sockaddr *)&name, sizeof(name))) { | |
54 | close(fd); | |
55 | return(-1); | |
56 | } | |
57 | if(listen(fd, 16) < 0) { | |
58 | close(fd); | |
59 | return(-1); | |
60 | } | |
61 | return(fd); | |
62 | } | |
63 | ||
64 | static int listensock6(int port) | |
65 | { | |
66 | struct sockaddr_in6 name; | |
67 | int fd; | |
68 | int valbuf; | |
69 | ||
70 | memset(&name, 0, sizeof(name)); | |
71 | name.sin6_family = AF_INET6; | |
72 | name.sin6_port = htons(port); | |
73 | if((fd = socket(PF_INET6, SOCK_STREAM, 0)) < 0) | |
74 | return(-1); | |
75 | valbuf = 1; | |
76 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &valbuf, sizeof(valbuf)); | |
77 | if(bind(fd, (struct sockaddr *)&name, sizeof(name))) { | |
78 | close(fd); | |
79 | return(-1); | |
80 | } | |
81 | if(listen(fd, 16) < 0) { | |
82 | close(fd); | |
83 | return(-1); | |
84 | } | |
85 | return(fd); | |
86 | } | |
87 | ||
5fc1bf9f | 88 | static struct hthead *parsereq(FILE *in) |
66987955 | 89 | { |
5fc1bf9f FT |
90 | struct hthead *req; |
91 | struct charbuf method, url, ver; | |
92 | int c; | |
66987955 | 93 | |
5fc1bf9f FT |
94 | req = NULL; |
95 | bufinit(method); | |
96 | bufinit(url); | |
97 | bufinit(ver); | |
98 | while(1) { | |
99 | c = getc(in); | |
100 | if(c == ' ') { | |
101 | break; | |
102 | } else if((c == EOF) || (c < 32) || (c >= 128)) { | |
103 | goto fail; | |
104 | } else { | |
105 | bufadd(method, c); | |
66987955 | 106 | } |
c9955b14 | 107 | } |
c9955b14 | 108 | while(1) { |
5fc1bf9f FT |
109 | c = getc(in); |
110 | if(c == ' ') { | |
c9955b14 | 111 | break; |
5fc1bf9f FT |
112 | } else if((c == EOF) || (c < 32)) { |
113 | goto fail; | |
114 | } else { | |
115 | bufadd(url, c); | |
66987955 FT |
116 | } |
117 | } | |
66987955 | 118 | while(1) { |
5fc1bf9f FT |
119 | c = getc(in); |
120 | if(c == 10) { | |
66987955 | 121 | break; |
5fc1bf9f FT |
122 | } else if(c == 13) { |
123 | } else if((c == EOF) || (c < 32) || (c >= 128)) { | |
c9955b14 | 124 | goto fail; |
5fc1bf9f FT |
125 | } else { |
126 | bufadd(ver, c); | |
127 | } | |
66987955 | 128 | } |
5fc1bf9f FT |
129 | bufadd(method, 0); |
130 | bufadd(url, 0); | |
131 | bufadd(ver, 0); | |
132 | req = mkreq(method.b, url.b, ver.b); | |
133 | if(parseheaders(req, in)) | |
134 | goto fail; | |
135 | goto out; | |
c9955b14 FT |
136 | |
137 | fail: | |
5fc1bf9f FT |
138 | if(req != NULL) { |
139 | freehthead(req); | |
140 | req = NULL; | |
141 | } | |
142 | out: | |
143 | buffree(method); | |
144 | buffree(url); | |
145 | buffree(ver); | |
146 | return(req); | |
66987955 FT |
147 | } |
148 | ||
5fc1bf9f | 149 | static struct hthead *parseresp(FILE *in) |
9d87a119 | 150 | { |
5fc1bf9f | 151 | struct hthead *req; |
9d87a119 | 152 | int code; |
5fc1bf9f FT |
153 | struct charbuf ver, msg; |
154 | int c; | |
9d87a119 | 155 | |
5fc1bf9f FT |
156 | req = NULL; |
157 | bufinit(ver); | |
158 | bufinit(msg); | |
159 | code = 0; | |
9d87a119 | 160 | while(1) { |
5fc1bf9f FT |
161 | c = getc(in); |
162 | if(c == ' ') { | |
9d87a119 | 163 | break; |
5fc1bf9f | 164 | } else if((c == EOF) || (c < 32) || (c >= 128)) { |
9d87a119 | 165 | goto fail; |
5fc1bf9f FT |
166 | } else { |
167 | bufadd(ver, c); | |
168 | } | |
169 | } | |
170 | while(1) { | |
171 | c = getc(in); | |
172 | if(c == ' ') { | |
173 | break; | |
174 | } else if((c == EOF) || (c < '0') || (c > '9')) { | |
9d87a119 | 175 | goto fail; |
5fc1bf9f FT |
176 | } else { |
177 | code = (code * 10) + (c - '0'); | |
178 | } | |
179 | } | |
180 | while(1) { | |
181 | c = getc(in); | |
182 | if(c == 10) { | |
183 | break; | |
184 | } else if(c == 13) { | |
185 | } else if((c == EOF) || (c < 32)) { | |
9d87a119 | 186 | goto fail; |
5fc1bf9f FT |
187 | } else { |
188 | bufadd(msg, c); | |
189 | } | |
9d87a119 | 190 | } |
5fc1bf9f FT |
191 | bufadd(msg, 0); |
192 | bufadd(ver, 0); | |
193 | req = mkresp(code, msg.b, ver.b); | |
194 | if(parseheaders(req, in)) | |
195 | goto fail; | |
196 | goto out; | |
9d87a119 FT |
197 | |
198 | fail: | |
5fc1bf9f FT |
199 | if(req != NULL) { |
200 | freehthead(req); | |
201 | req = NULL; | |
202 | } | |
203 | out: | |
204 | buffree(msg); | |
205 | buffree(ver); | |
206 | return(req); | |
9d87a119 FT |
207 | } |
208 | ||
5fc1bf9f | 209 | static off_t passdata(FILE *in, FILE *out, off_t max) |
9d87a119 | 210 | { |
5fc1bf9f FT |
211 | size_t read; |
212 | off_t total; | |
213 | char buf[8192]; | |
214 | ||
215 | total = 0; | |
f9255ddd | 216 | while(!feof(in) && ((max < 0) || (total < max))) { |
5fc1bf9f FT |
217 | read = sizeof(buf); |
218 | if(max >= 0) | |
a701d7b7 | 219 | read = min(max - total, read); |
5fc1bf9f FT |
220 | read = fread(buf, 1, read, in); |
221 | if(ferror(in)) | |
222 | return(-1); | |
223 | if(fwrite(buf, 1, read, out) != read) | |
224 | return(-1); | |
225 | total += read; | |
9d87a119 | 226 | } |
5fc1bf9f FT |
227 | return(total); |
228 | } | |
229 | ||
230 | static int passchunks(FILE *in, FILE *out) | |
231 | { | |
232 | char buf[8192]; | |
233 | size_t read; | |
234 | ||
235 | do { | |
236 | read = fread(buf, 1, sizeof(buf), in); | |
237 | if(ferror(in)) | |
238 | return(-1); | |
f9255ddd | 239 | fprintf(out, "%zx\r\n", read); |
5fc1bf9f FT |
240 | if(fwrite(buf, 1, read, out) != read) |
241 | return(-1); | |
242 | fprintf(out, "\r\n"); | |
243 | } while(read > 0); | |
244 | return(0); | |
245 | } | |
246 | ||
247 | static int hasheader(struct hthead *head, char *name, char *val) | |
248 | { | |
249 | char *hd; | |
250 | ||
251 | if((hd = getheader(head, name)) == NULL) | |
252 | return(0); | |
253 | return(!strcasecmp(hd, val)); | |
9d87a119 FT |
254 | } |
255 | ||
66987955 FT |
256 | static void serve(struct muth *muth, va_list args) |
257 | { | |
258 | vavar(int, fd); | |
9d87a119 | 259 | vavar(struct sockaddr_storage, name); |
af34331c | 260 | int pfds[2]; |
5fc1bf9f | 261 | FILE *in, *out; |
9d87a119 | 262 | struct hthead *req, *resp; |
9d87a119 | 263 | char nmbuf[256]; |
5fc1bf9f FT |
264 | char *hd, *p; |
265 | off_t dlen; | |
66987955 | 266 | |
5fc1bf9f FT |
267 | in = mtstdopen(fd, 1, 60, "r+"); |
268 | out = NULL; | |
3c296bd4 | 269 | req = resp = NULL; |
66987955 | 270 | while(1) { |
5fc1bf9f FT |
271 | if((req = parsereq(in)) == NULL) |
272 | break; | |
273 | replrest(req, req->url); | |
9e9eca79 FT |
274 | if(req->rest[0] == '/') |
275 | replrest(req, req->rest + 1); | |
edad3c6a FT |
276 | if((p = strchr(req->rest, '?')) != NULL) |
277 | *p = 0; | |
9d87a119 | 278 | |
9d87a119 FT |
279 | if(name.ss_family == AF_INET) { |
280 | headappheader(req, "X-Ash-Address", inet_ntop(AF_INET, &((struct sockaddr_in *)&name)->sin_addr, nmbuf, sizeof(nmbuf))); | |
281 | headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in *)&name)->sin_port))); | |
282 | } else if(name.ss_family == AF_INET6) { | |
283 | headappheader(req, "X-Ash-Address", inet_ntop(AF_INET6, &((struct sockaddr_in6 *)&name)->sin6_addr, nmbuf, sizeof(nmbuf))); | |
284 | headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in6 *)&name)->sin6_port))); | |
285 | } | |
5fc1bf9f | 286 | |
46c3d430 | 287 | if(block(plex, EV_WRITE, 60) <= 0) |
5fc1bf9f | 288 | break; |
af34331c | 289 | if(socketpair(PF_UNIX, SOCK_STREAM, 0, pfds)) |
5fc1bf9f | 290 | break; |
af34331c | 291 | if(sendreq(plex, req, pfds[0])) |
5fc1bf9f | 292 | break; |
af34331c | 293 | close(pfds[0]); |
5fc1bf9f | 294 | out = mtstdopen(pfds[1], 1, 600, "r+"); |
a0327573 | 295 | |
a0327573 FT |
296 | if((hd = getheader(req, "content-length")) != NULL) { |
297 | dlen = atoo(hd); | |
a06a2fbd | 298 | if(dlen > 0) { |
5fc1bf9f FT |
299 | if(passdata(in, out, dlen) != dlen) |
300 | break; | |
a06a2fbd | 301 | } |
a0327573 | 302 | } |
5fc1bf9f FT |
303 | if(fflush(out)) |
304 | break; | |
d93d9a05 | 305 | /* Make sure to send EOF */ |
5fc1bf9f | 306 | shutdown(pfds[1], SHUT_WR); |
9d87a119 | 307 | |
f9255ddd FT |
308 | if((resp = parseresp(out)) == NULL) |
309 | break; | |
5fc1bf9f FT |
310 | replstr(&resp->ver, req->ver); |
311 | ||
312 | if(!strcmp(req->ver, "HTTP/1.0")) { | |
313 | writeresp(in, resp); | |
314 | fprintf(in, "\r\n"); | |
9d87a119 | 315 | if((hd = getheader(resp, "content-length")) != NULL) { |
5fc1bf9f FT |
316 | dlen = passdata(out, in, -1); |
317 | if(dlen != atoo(hd)) | |
318 | break; | |
319 | if(!hasheader(req, "connection", "keep-alive")) | |
9d87a119 | 320 | break; |
5fc1bf9f FT |
321 | } else { |
322 | passdata(out, in, -1); | |
323 | break; | |
9d87a119 | 324 | } |
5fc1bf9f FT |
325 | if(hasheader(req, "connection", "close") || hasheader(resp, "connection", "close")) |
326 | break; | |
327 | } else if(!strcmp(req->ver, "HTTP/1.1")) { | |
328 | if((hd = getheader(resp, "content-length")) != NULL) { | |
329 | writeresp(in, resp); | |
330 | fprintf(in, "\r\n"); | |
331 | dlen = passdata(out, in, -1); | |
332 | if(dlen != atoo(hd)) | |
333 | break; | |
334 | } else if(!getheader(resp, "transfer-encoding")) { | |
335 | headappheader(resp, "Transfer-Encoding", "chunked"); | |
336 | writeresp(in, resp); | |
337 | fprintf(in, "\r\n"); | |
338 | if(passchunks(out, in)) | |
339 | break; | |
340 | } else { | |
341 | writeresp(in, resp); | |
342 | fprintf(in, "\r\n"); | |
343 | passdata(out, in, -1); | |
9d87a119 | 344 | break; |
5fc1bf9f FT |
345 | } |
346 | if(hasheader(req, "connection", "close") || hasheader(resp, "connection", "close")) | |
9d87a119 | 347 | break; |
5fc1bf9f FT |
348 | } else { |
349 | break; | |
9d87a119 | 350 | } |
5fc1bf9f FT |
351 | |
352 | fclose(out); | |
353 | out = NULL; | |
9d87a119 | 354 | freehthead(req); |
9d87a119 | 355 | freehthead(resp); |
5fc1bf9f | 356 | req = resp = NULL; |
66987955 FT |
357 | } |
358 | ||
5fc1bf9f FT |
359 | if(out != NULL) |
360 | fclose(out); | |
9d87a119 FT |
361 | if(req != NULL) |
362 | freehthead(req); | |
363 | if(resp != NULL) | |
364 | freehthead(resp); | |
5fc1bf9f | 365 | fclose(in); |
66987955 FT |
366 | } |
367 | ||
f4cdf919 FT |
368 | static void listenloop(struct muth *muth, va_list args) |
369 | { | |
370 | vavar(int, ss); | |
371 | int ns; | |
372 | struct sockaddr_storage name; | |
373 | socklen_t namelen; | |
374 | ||
375 | while(1) { | |
376 | namelen = sizeof(name); | |
9d87a119 | 377 | block(ss, EV_READ, 0); |
f4cdf919 | 378 | ns = accept(ss, (struct sockaddr *)&name, &namelen); |
66987955 FT |
379 | if(ns < 0) { |
380 | flog(LOG_ERR, "accept: %s", strerror(errno)); | |
381 | goto out; | |
382 | } | |
9d87a119 | 383 | mustart(serve, ns, name); |
f4cdf919 | 384 | } |
66987955 FT |
385 | |
386 | out: | |
387 | close(ss); | |
f4cdf919 FT |
388 | } |
389 | ||
32e24c19 FT |
390 | static void plexwatch(struct muth *muth, va_list args) |
391 | { | |
392 | vavar(int, fd); | |
393 | char *buf; | |
394 | int ret; | |
395 | ||
396 | while(1) { | |
397 | block(fd, EV_READ, 0); | |
398 | buf = smalloc(65536); | |
399 | ret = recv(fd, buf, 65536, 0); | |
400 | if(ret < 0) { | |
401 | flog(LOG_WARNING, "received error on rootplex read channel: %s", strerror(errno)); | |
402 | exit(1); | |
403 | } else if(ret == 0) { | |
404 | exit(0); | |
405 | } | |
406 | /* Maybe I'd like to implement some protocol in this direction | |
407 | * some day... */ | |
408 | free(buf); | |
409 | } | |
410 | } | |
411 | ||
f0bbedf7 FT |
412 | int main(int argc, char **argv) |
413 | { | |
f4cdf919 FT |
414 | int fd; |
415 | ||
9d87a119 FT |
416 | if(argc < 2) { |
417 | fprintf(stderr, "usage: htparser ROOT [ARGS...]\n"); | |
418 | exit(1); | |
419 | } | |
420 | if((plex = stdmkchild(argv + 1)) < 0) { | |
421 | flog(LOG_ERR, "could not spawn root multiplexer: %s", strerror(errno)); | |
422 | return(1); | |
423 | } | |
f4cdf919 FT |
424 | if((fd = listensock6(8080)) < 0) { |
425 | flog(LOG_ERR, "could not listen on IPv6: %s", strerror(errno)); | |
426 | return(1); | |
427 | } | |
428 | mustart(listenloop, fd); | |
429 | if((fd = listensock4(8080)) < 0) { | |
430 | if(errno != EADDRINUSE) { | |
431 | flog(LOG_ERR, "could not listen on IPv4: %s", strerror(errno)); | |
432 | return(1); | |
433 | } | |
434 | } else { | |
435 | mustart(listenloop, fd); | |
436 | } | |
32e24c19 | 437 | mustart(plexwatch, plex); |
f4cdf919 FT |
438 | ioloop(); |
439 | return(0); | |
f0bbedf7 | 440 | } |