Commit | Line | Data |
---|---|---|
33733396 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 <string.h> | |
41213112 FT |
21 | #include <unistd.h> |
22 | #include <sys/socket.h> | |
23 | #include <errno.h> | |
5fc1bf9f FT |
24 | #include <ctype.h> |
25 | #include <stdio.h> | |
470938bd | 26 | #include <fcntl.h> |
33733396 FT |
27 | |
28 | #ifdef HAVE_CONFIG_H | |
29 | #include <config.h> | |
30 | #endif | |
31 | #include <utils.h> | |
41213112 | 32 | #include <log.h> |
33733396 | 33 | #include <req.h> |
41213112 | 34 | #include <proc.h> |
33733396 | 35 | |
41213112 | 36 | struct hthead *mkreq(char *method, char *url, char *ver) |
33733396 | 37 | { |
41213112 | 38 | struct hthead *req; |
33733396 FT |
39 | |
40 | omalloc(req); | |
41 | req->method = sstrdup(method); | |
42 | req->url = sstrdup(url); | |
43 | req->ver = sstrdup(ver); | |
41213112 | 44 | req->rest = sstrdup(url); |
33733396 FT |
45 | return(req); |
46 | } | |
47 | ||
41213112 FT |
48 | struct hthead *mkresp(int code, char *msg, char *ver) |
49 | { | |
50 | struct hthead *resp; | |
51 | ||
52 | omalloc(resp); | |
53 | resp->code = code; | |
54 | resp->msg = sstrdup(msg); | |
55 | resp->ver = sstrdup(ver); | |
56 | return(resp); | |
57 | } | |
58 | ||
59 | void freehthead(struct hthead *head) | |
33733396 FT |
60 | { |
61 | int i; | |
62 | ||
41213112 FT |
63 | if(head->method != NULL) |
64 | free(head->method); | |
65 | if(head->url != NULL) | |
66 | free(head->url); | |
67 | if(head->msg != NULL) | |
68 | free(head->msg); | |
69 | if(head->ver != NULL) | |
70 | free(head->ver); | |
71 | if(head->rest != NULL) | |
72 | free(head->rest); | |
73 | if(head->headers) { | |
74 | for(i = 0; i < head->noheaders; i++) { | |
75 | free(head->headers[i][0]); | |
76 | free(head->headers[i][1]); | |
77 | free(head->headers[i]); | |
33733396 | 78 | } |
41213112 | 79 | free(head->headers); |
33733396 | 80 | } |
41213112 | 81 | free(head); |
33733396 FT |
82 | } |
83 | ||
41213112 | 84 | char *getheader(struct hthead *head, char *name) |
66987955 FT |
85 | { |
86 | int i; | |
87 | ||
41213112 FT |
88 | for(i = 0; i < head->noheaders; i++) { |
89 | if(!strcasecmp(head->headers[i][0], name)) | |
90 | return(head->headers[i][1]); | |
66987955 FT |
91 | } |
92 | return(NULL); | |
93 | } | |
94 | ||
5fc1bf9f FT |
95 | static void trim(struct charbuf *buf) |
96 | { | |
97 | char *p; | |
98 | ||
a39d9e16 FT |
99 | for(p = buf->b; (p - buf->b < buf->d) && isspace(*p); p++); |
100 | memmove(buf->b, p, buf->d -= (p - buf->b)); | |
101 | if(buf->d > 0) | |
c7b1ef35 | 102 | for(p = buf->b + buf->d - 1; (p > buf->b) && isspace(*p); p--, buf->d--); |
5fc1bf9f FT |
103 | } |
104 | ||
105 | int parseheaders(struct hthead *head, FILE *in) | |
106 | { | |
107 | int c, state; | |
108 | struct charbuf name, val; | |
90b0ba0f | 109 | size_t tsz; |
5fc1bf9f FT |
110 | |
111 | bufinit(name); | |
112 | bufinit(val); | |
113 | state = 0; | |
90b0ba0f | 114 | tsz = 0; |
5fc1bf9f FT |
115 | while(1) { |
116 | c = fgetc(in); | |
90b0ba0f FT |
117 | if(++tsz >= 65536) |
118 | goto fail; | |
5fc1bf9f FT |
119 | again: |
120 | if(state == 0) { | |
121 | if(c == '\r') { | |
122 | } else if(c == '\n') { | |
123 | break; | |
124 | } else if(c == EOF) { | |
125 | goto fail; | |
126 | } else { | |
127 | state = 1; | |
128 | goto again; | |
129 | } | |
130 | } else if(state == 1) { | |
131 | if(c == ':') { | |
132 | trim(&name); | |
133 | bufadd(name, 0); | |
134 | state = 2; | |
135 | } else if(c == '\r') { | |
136 | } else if(c == '\n') { | |
137 | goto fail; | |
138 | } else if(c == EOF) { | |
139 | goto fail; | |
140 | } else { | |
141 | bufadd(name, c); | |
142 | } | |
143 | } else if(state == 2) { | |
144 | if(c == '\r') { | |
145 | } else if(c == '\n') { | |
146 | trim(&val); | |
147 | bufadd(val, 0); | |
148 | headappheader(head, name.b, val.b); | |
149 | buffree(name); | |
150 | buffree(val); | |
151 | state = 0; | |
152 | } else if(c == EOF) { | |
153 | goto fail; | |
154 | } else { | |
155 | bufadd(val, c); | |
156 | } | |
157 | } | |
158 | } | |
159 | return(0); | |
160 | ||
161 | fail: | |
162 | buffree(name); | |
163 | buffree(val); | |
164 | return(-1); | |
165 | } | |
166 | ||
3ef78895 FT |
167 | struct hthead *parseresponse(FILE *in) |
168 | { | |
169 | struct hthead *req; | |
170 | int code; | |
171 | struct charbuf ver, msg; | |
172 | int c; | |
173 | ||
174 | req = NULL; | |
175 | bufinit(ver); | |
176 | bufinit(msg); | |
177 | code = 0; | |
178 | while(1) { | |
179 | c = getc(in); | |
180 | if(c == ' ') { | |
181 | break; | |
182 | } else if((c == EOF) || (c < 32) || (c >= 128)) { | |
183 | goto fail; | |
184 | } else { | |
185 | bufadd(ver, c); | |
186 | if(ver.d >= 128) | |
187 | goto fail; | |
188 | } | |
189 | } | |
190 | while(1) { | |
191 | c = getc(in); | |
192 | if(c == ' ') { | |
193 | break; | |
194 | } else if((c == EOF) || (c < '0') || (c > '9')) { | |
195 | goto fail; | |
196 | } else { | |
197 | code = (code * 10) + (c - '0'); | |
198 | if(code >= 10000) | |
199 | goto fail; | |
200 | } | |
201 | } | |
202 | while(1) { | |
203 | c = getc(in); | |
204 | if(c == 10) { | |
205 | break; | |
206 | } else if(c == 13) { | |
207 | } else if((c == EOF) || (c < 32)) { | |
208 | goto fail; | |
209 | } else { | |
210 | bufadd(msg, c); | |
211 | if(msg.d >= 512) | |
212 | goto fail; | |
213 | } | |
214 | } | |
215 | bufadd(msg, 0); | |
216 | bufadd(ver, 0); | |
217 | req = mkresp(code, msg.b, ver.b); | |
218 | if(parseheaders(req, in)) | |
219 | goto fail; | |
220 | goto out; | |
221 | ||
222 | fail: | |
223 | if(req != NULL) { | |
224 | freehthead(req); | |
225 | req = NULL; | |
226 | } | |
227 | out: | |
228 | buffree(msg); | |
229 | buffree(ver); | |
230 | return(req); | |
231 | } | |
232 | ||
9e9eca79 FT |
233 | void replrest(struct hthead *head, char *rest) |
234 | { | |
235 | char *tmp; | |
236 | ||
237 | /* Do not free the current rest string yet, so that the new one | |
5fc1bf9f | 238 | * can be taken from a subpart of the old one. */ |
9e9eca79 FT |
239 | tmp = head->rest; |
240 | head->rest = sstrdup(rest); | |
241 | free(tmp); | |
242 | } | |
243 | ||
41213112 | 244 | void headpreheader(struct hthead *head, const char *name, const char *val) |
33733396 | 245 | { |
41213112 FT |
246 | head->headers = srealloc(head->headers, sizeof(*head->headers) * (head->noheaders + 1)); |
247 | memmove(head->headers + 1, head->headers, sizeof(*head->headers) * head->noheaders); | |
248 | head->noheaders++; | |
249 | head->headers[0] = smalloc(sizeof(*head->headers[0]) * 2); | |
250 | head->headers[0][0] = sstrdup(name); | |
251 | head->headers[0][1] = sstrdup(val); | |
33733396 FT |
252 | } |
253 | ||
41213112 | 254 | void headappheader(struct hthead *head, const char *name, const char *val) |
33733396 FT |
255 | { |
256 | int i; | |
257 | ||
41213112 FT |
258 | i = head->noheaders++; |
259 | head->headers = srealloc(head->headers, sizeof(*head->headers) * head->noheaders); | |
260 | head->headers[i] = smalloc(sizeof(*head->headers[i]) * 2); | |
261 | head->headers[i][0] = sstrdup(name); | |
262 | head->headers[i][1] = sstrdup(val); | |
263 | } | |
264 | ||
f89ce57a FT |
265 | void headrmheader(struct hthead *head, const char *name) |
266 | { | |
267 | int i; | |
268 | ||
269 | for(i = 0; i < head->noheaders; i++) { | |
270 | if(!strcasecmp(head->headers[i][0], name)) { | |
271 | free(head->headers[i][0]); | |
272 | free(head->headers[i][1]); | |
273 | free(head->headers[i]); | |
608f4ac7 | 274 | memmove(head->headers + i, head->headers + i + 1, sizeof(head->headers) * (--head->noheaders - i)); |
f89ce57a FT |
275 | return; |
276 | } | |
277 | } | |
278 | } | |
279 | ||
5fc1bf9f FT |
280 | int writeresp(FILE *out, struct hthead *resp) |
281 | { | |
282 | int i; | |
283 | ||
284 | if(fprintf(out, "%s %i %s\r\n", resp->ver, resp->code, resp->msg) < 0) | |
285 | return(-1); | |
286 | for(i = 0; i < resp->noheaders; i++) { | |
287 | if(fprintf(out, "%s: %s\r\n", resp->headers[i][0], resp->headers[i][1]) < 0) | |
288 | return(-1); | |
289 | } | |
290 | return(0); | |
291 | } | |
292 | ||
d9f67fea | 293 | int sendreq2(int sock, struct hthead *req, int fd, int flags) |
41213112 FT |
294 | { |
295 | int ret, i; | |
41213112 FT |
296 | struct charbuf buf; |
297 | ||
41213112 FT |
298 | bufinit(buf); |
299 | bufcatstr2(buf, req->method); | |
300 | bufcatstr2(buf, req->url); | |
301 | bufcatstr2(buf, req->ver); | |
302 | bufcatstr2(buf, req->rest); | |
303 | for(i = 0; i < req->noheaders; i++) { | |
304 | bufcatstr2(buf, req->headers[i][0]); | |
305 | bufcatstr2(buf, req->headers[i][1]); | |
306 | } | |
307 | bufcatstr2(buf, ""); | |
d9f67fea | 308 | ret = sendfd2(sock, fd, buf.b, buf.d, flags); |
41213112 | 309 | buffree(buf); |
af34331c | 310 | if(ret < 0) |
41213112 | 311 | return(-1); |
af34331c FT |
312 | else |
313 | return(0); | |
41213112 FT |
314 | } |
315 | ||
d9f67fea FT |
316 | int sendreq(int sock, struct hthead *req, int fd) |
317 | { | |
096c79fd | 318 | return(sendreq2(sock, req, fd, MSG_NOSIGNAL)); |
d9f67fea FT |
319 | } |
320 | ||
41213112 FT |
321 | int recvreq(int sock, struct hthead **reqp) |
322 | { | |
323 | int fd; | |
324 | struct charbuf buf; | |
325 | char *p; | |
326 | size_t l; | |
327 | char *name, *val; | |
328 | struct hthead *req; | |
329 | ||
330 | if((fd = recvfd(sock, &buf.b, &buf.d)) < 0) { | |
331 | return(-1); | |
332 | } | |
470938bd | 333 | fcntl(fd, F_SETFD, FD_CLOEXEC); |
41213112 FT |
334 | buf.s = buf.d; |
335 | p = buf.b; | |
336 | l = buf.d; | |
337 | ||
338 | *reqp = omalloc(req); | |
339 | if((req->method = sstrdup(decstr(&p, &l))) == NULL) | |
340 | goto fail; | |
341 | if((req->url = sstrdup(decstr(&p, &l))) == NULL) | |
342 | goto fail; | |
343 | if((req->ver = sstrdup(decstr(&p, &l))) == NULL) | |
344 | goto fail; | |
345 | if((req->rest = sstrdup(decstr(&p, &l))) == NULL) | |
346 | goto fail; | |
347 | ||
348 | while(1) { | |
349 | if(!*(name = decstr(&p, &l))) | |
350 | break; | |
351 | val = decstr(&p, &l); | |
352 | headappheader(req, name, val); | |
353 | } | |
354 | ||
355 | buffree(buf); | |
356 | return(fd); | |
357 | ||
358 | fail: | |
359 | close(fd); | |
360 | freehthead(req); | |
361 | errno = EPROTO; | |
362 | return(-1); | |
33733396 | 363 | } |
1604c096 FT |
364 | |
365 | char *unquoteurl(char *in) | |
366 | { | |
367 | struct charbuf buf; | |
368 | char *p; | |
369 | int c; | |
370 | ||
371 | bufinit(buf); | |
372 | p = in; | |
373 | while(*p) { | |
374 | if(*p == '%') { | |
375 | if(!p[1] || !p[2]) | |
376 | goto fail; | |
377 | c = 0; | |
378 | if((p[1] >= '0') && (p[1] <= '9')) c |= (p[1] - '0') << 4; | |
379 | else if((p[1] >= 'a') && (p[1] <= 'f')) c |= (p[1] - 'a' + 10) << 4; | |
380 | else if((p[1] >= 'A') && (p[1] <= 'F')) c |= (p[1] - 'A' + 10) << 4; | |
381 | else goto fail; | |
382 | if((p[2] >= '0') && (p[2] <= '9')) c |= (p[2] - '0'); | |
383 | else if((p[2] >= 'a') && (p[2] <= 'f')) c |= (p[2] - 'a' + 10); | |
384 | else if((p[2] >= 'A') && (p[2] <= 'F')) c |= (p[2] - 'A' + 10); | |
385 | else goto fail; | |
386 | bufadd(buf, c); | |
387 | p += 3; | |
388 | } else { | |
389 | bufadd(buf, *(p++)); | |
390 | } | |
391 | } | |
392 | bufadd(buf, 0); | |
393 | return(buf.b); | |
394 | fail: | |
395 | buffree(buf); | |
396 | return(NULL); | |
397 | } |