Commit | Line | Data |
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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 FT |
22 | #include <string.h> |
23 | #include <sys/select.h> | |
24 | #include <sys/socket.h> | |
25 | #include <netinet/in.h> | |
26 | #include <errno.h> | |
f0bbedf7 FT |
27 | |
28 | #ifdef HAVE_CONFIG_H | |
29 | #include <config.h> | |
30 | #endif | |
31 | #include <utils.h> | |
f4cdf919 FT |
32 | #include <mt.h> |
33 | #include <log.h> | |
66987955 | 34 | #include <req.h> |
f4cdf919 FT |
35 | |
36 | #define EV_READ 1 | |
37 | #define EV_WRITE 2 | |
38 | ||
39 | struct blocker { | |
40 | struct blocker *n, *p; | |
41 | int fd; | |
42 | int ev; | |
43 | struct muth *th; | |
44 | }; | |
45 | ||
46 | static struct blocker *blockers; | |
47 | ||
48 | static int block(int fd, int ev) | |
49 | { | |
50 | struct blocker *bl; | |
51 | int rv; | |
52 | ||
53 | omalloc(bl); | |
54 | bl->fd = fd; | |
55 | bl->ev = ev; | |
56 | bl->th = current; | |
57 | bl->n = blockers; | |
58 | if(blockers) | |
59 | blockers->p = bl; | |
60 | blockers = bl; | |
61 | rv = yield(); | |
62 | if(bl->n) | |
63 | bl->n->p = bl->p; | |
64 | if(bl->p) | |
65 | bl->p->n = bl->n; | |
66 | if(bl == blockers) | |
67 | blockers = bl->n; | |
68 | return(rv); | |
69 | } | |
70 | ||
71 | static int listensock4(int port) | |
72 | { | |
73 | struct sockaddr_in name; | |
74 | int fd; | |
75 | int valbuf; | |
76 | ||
77 | memset(&name, 0, sizeof(name)); | |
78 | name.sin_family = AF_INET; | |
79 | name.sin_port = htons(port); | |
80 | if((fd = socket(PF_INET, SOCK_STREAM, 0)) < 0) | |
81 | return(-1); | |
82 | valbuf = 1; | |
83 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &valbuf, sizeof(valbuf)); | |
84 | if(bind(fd, (struct sockaddr *)&name, sizeof(name))) { | |
85 | close(fd); | |
86 | return(-1); | |
87 | } | |
88 | if(listen(fd, 16) < 0) { | |
89 | close(fd); | |
90 | return(-1); | |
91 | } | |
92 | return(fd); | |
93 | } | |
94 | ||
95 | static int listensock6(int port) | |
96 | { | |
97 | struct sockaddr_in6 name; | |
98 | int fd; | |
99 | int valbuf; | |
100 | ||
101 | memset(&name, 0, sizeof(name)); | |
102 | name.sin6_family = AF_INET6; | |
103 | name.sin6_port = htons(port); | |
104 | if((fd = socket(PF_INET6, SOCK_STREAM, 0)) < 0) | |
105 | return(-1); | |
106 | valbuf = 1; | |
107 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &valbuf, sizeof(valbuf)); | |
108 | if(bind(fd, (struct sockaddr *)&name, sizeof(name))) { | |
109 | close(fd); | |
110 | return(-1); | |
111 | } | |
112 | if(listen(fd, 16) < 0) { | |
113 | close(fd); | |
114 | return(-1); | |
115 | } | |
116 | return(fd); | |
117 | } | |
118 | ||
c9955b14 | 119 | static size_t readhead(int fd, struct charbuf *buf) |
66987955 | 120 | { |
66987955 | 121 | int nl; |
c9955b14 | 122 | size_t off; |
66987955 | 123 | |
c9955b14 FT |
124 | int get1(void) |
125 | { | |
126 | int ret; | |
127 | ||
128 | while(!(off < buf->d)) { | |
129 | sizebuf(*buf, buf->d + 1024); | |
130 | ret = recv(fd, buf->b + buf->d, buf->s - buf->d, MSG_DONTWAIT); | |
131 | if(ret <= 0) { | |
132 | if((ret < 0) && (errno == EAGAIN)) { | |
133 | block(fd, EV_READ); | |
134 | continue; | |
135 | } | |
136 | return(-1); | |
66987955 | 137 | } |
c9955b14 | 138 | buf->d += ret; |
66987955 | 139 | } |
c9955b14 FT |
140 | return(buf->b[off++]); |
141 | } | |
142 | ||
143 | nl = 0; | |
144 | off = 0; | |
145 | while(1) { | |
146 | switch(get1()) { | |
147 | case '\n': | |
66987955 | 148 | if(nl) |
c9955b14 | 149 | return(off); |
66987955 | 150 | nl = 1; |
c9955b14 FT |
151 | break; |
152 | case '\r': | |
153 | break; | |
154 | case -1: | |
155 | return(-1); | |
156 | default: | |
66987955 | 157 | nl = 0; |
c9955b14 | 158 | break; |
66987955 FT |
159 | } |
160 | } | |
66987955 FT |
161 | } |
162 | ||
163 | #define SKIPNL(ptr) ({ \ | |
164 | int __buf__; \ | |
165 | if(*(ptr) == '\r') \ | |
166 | *((ptr)++) = 0; \ | |
167 | if(*(ptr) != '\n') { \ | |
168 | __buf__ = 0; \ | |
169 | } else { \ | |
170 | *((ptr)++) = 0; \ | |
171 | __buf__ = 1; \ | |
172 | } \ | |
173 | __buf__;}) | |
174 | static struct htreq *parseraw(char *buf) | |
175 | { | |
176 | char *p, *p2, *nl; | |
177 | char *method, *url, *ver; | |
178 | struct htreq *req; | |
179 | ||
180 | if((nl = strchr(buf, '\n')) == NULL) | |
181 | return(NULL); | |
182 | if(((p = strchr(buf, ' ')) == NULL) || (p > nl)) | |
183 | return(NULL); | |
184 | method = buf; | |
185 | *(p++) = 0; | |
186 | if(((p2 = strchr(p, ' ')) == NULL) || (p2 > nl)) | |
187 | return(NULL); | |
188 | url = p; | |
189 | p = p2; | |
190 | *(p++) = 0; | |
191 | if(strncmp(p, "HTTP/", 5)) | |
192 | return(NULL); | |
193 | ver = (p += 5); | |
194 | for(; ((*p >= '0') && (*p <= '9')) || (*p == '.'); p++); | |
195 | if(!SKIPNL(p)) | |
196 | return(NULL); | |
197 | ||
198 | req = mkreq(method, url, ver); | |
199 | while(1) { | |
200 | if(SKIPNL(p)) { | |
201 | if(*p) | |
c9955b14 | 202 | goto fail; |
66987955 FT |
203 | break; |
204 | } | |
205 | if((nl = strchr(p, '\n')) == NULL) | |
c9955b14 | 206 | goto fail; |
66987955 | 207 | if(((p2 = strchr(p, ':')) == NULL) || (p2 > nl)) |
c9955b14 | 208 | goto fail; |
66987955 FT |
209 | *(p2++) = 0; |
210 | for(; (*p2 == ' ') || (*p2 == '\t'); p2++); | |
211 | for(nl = p2; (*nl != '\r') && (*nl != '\n'); nl++); | |
212 | if(!SKIPNL(nl)) | |
c9955b14 | 213 | goto fail; |
66987955 FT |
214 | reqappheader(req, p, p2); |
215 | p = nl; | |
216 | } | |
217 | return(req); | |
c9955b14 FT |
218 | |
219 | fail: | |
220 | freereq(req); | |
221 | return(NULL); | |
66987955 FT |
222 | } |
223 | ||
224 | static void serve(struct muth *muth, va_list args) | |
225 | { | |
226 | vavar(int, fd); | |
c9955b14 | 227 | struct charbuf buf; |
66987955 | 228 | struct htreq *req; |
c9955b14 | 229 | size_t headoff; |
66987955 | 230 | |
c9955b14 | 231 | bufinit(buf); |
66987955 | 232 | while(1) { |
c9955b14 FT |
233 | buf.d = 0; |
234 | if((headoff = readhead(fd, &buf)) < 0) | |
66987955 | 235 | goto out; |
c9955b14 | 236 | if((req = parseraw(buf.b)) == NULL) |
66987955 | 237 | goto out; |
c9955b14 | 238 | printf("\"%s\", \"%s\", \"%s\", \"%s\"\n", req->method, req->url, req->ver, getheader(req, "host")); |
66987955 FT |
239 | freereq(req); |
240 | } | |
241 | ||
242 | out: | |
c9955b14 | 243 | buffree(buf); |
66987955 FT |
244 | close(fd); |
245 | } | |
246 | ||
f4cdf919 FT |
247 | static void listenloop(struct muth *muth, va_list args) |
248 | { | |
249 | vavar(int, ss); | |
250 | int ns; | |
251 | struct sockaddr_storage name; | |
252 | socklen_t namelen; | |
253 | ||
254 | while(1) { | |
255 | namelen = sizeof(name); | |
256 | block(ss, EV_READ); | |
257 | ns = accept(ss, (struct sockaddr *)&name, &namelen); | |
66987955 FT |
258 | if(ns < 0) { |
259 | flog(LOG_ERR, "accept: %s", strerror(errno)); | |
260 | goto out; | |
261 | } | |
262 | mustart(serve, ns); | |
f4cdf919 | 263 | } |
66987955 FT |
264 | |
265 | out: | |
266 | close(ss); | |
f4cdf919 FT |
267 | } |
268 | ||
269 | static void ioloop(void) | |
270 | { | |
271 | int ret; | |
272 | fd_set rfds, wfds, efds; | |
273 | struct blocker *bl, *nbl; | |
274 | int maxfd; | |
275 | int ev; | |
276 | ||
66987955 | 277 | while(blockers != NULL) { |
f4cdf919 FT |
278 | FD_ZERO(&rfds); |
279 | FD_ZERO(&wfds); | |
280 | FD_ZERO(&efds); | |
281 | maxfd = 0; | |
282 | for(bl = blockers; bl; bl = bl->n) { | |
283 | if(bl->ev & EV_READ) | |
284 | FD_SET(bl->fd, &rfds); | |
285 | if(bl->ev & EV_WRITE) | |
286 | FD_SET(bl->fd, &wfds); | |
287 | FD_SET(bl->fd, &efds); | |
288 | if(bl->fd > maxfd) | |
289 | maxfd = bl->fd; | |
290 | } | |
291 | ret = select(maxfd + 1, &rfds, &wfds, &efds, NULL); | |
292 | if(ret < 0) { | |
293 | if(errno != EINTR) { | |
294 | flog(LOG_CRIT, "ioloop: select errored out: %s", strerror(errno)); | |
295 | /* To avoid CPU hogging in case it's bad, which it | |
296 | * probably is. */ | |
297 | sleep(1); | |
298 | } | |
299 | } | |
300 | for(bl = blockers; bl; bl = nbl) { | |
301 | nbl = bl->n; | |
302 | ev = 0; | |
303 | if(FD_ISSET(bl->fd, &rfds)) | |
304 | ev |= EV_READ; | |
305 | if(FD_ISSET(bl->fd, &wfds)) | |
306 | ev |= EV_WRITE; | |
307 | if(FD_ISSET(bl->fd, &efds)) | |
308 | ev = -1; | |
66987955 FT |
309 | if(ev != 0) |
310 | resume(bl->th, ev); | |
f4cdf919 FT |
311 | } |
312 | } | |
313 | } | |
f0bbedf7 FT |
314 | |
315 | int main(int argc, char **argv) | |
316 | { | |
f4cdf919 FT |
317 | int fd; |
318 | ||
319 | if((fd = listensock6(8080)) < 0) { | |
320 | flog(LOG_ERR, "could not listen on IPv6: %s", strerror(errno)); | |
321 | return(1); | |
322 | } | |
323 | mustart(listenloop, fd); | |
324 | if((fd = listensock4(8080)) < 0) { | |
325 | if(errno != EADDRINUSE) { | |
326 | flog(LOG_ERR, "could not listen on IPv4: %s", strerror(errno)); | |
327 | return(1); | |
328 | } | |
329 | } else { | |
330 | mustart(listenloop, fd); | |
331 | } | |
332 | ioloop(); | |
333 | return(0); | |
f0bbedf7 | 334 | } |