Blame


1 d3a08f4d 2021-01-17 op /*
2 a555e0d6 2022-07-04 op * Copyright (c) 2021, 2022 Omar Polo <op@omarpolo.com>
3 d3a08f4d 2021-01-17 op *
4 d3a08f4d 2021-01-17 op * Permission to use, copy, modify, and distribute this software for any
5 d3a08f4d 2021-01-17 op * purpose with or without fee is hereby granted, provided that the above
6 d3a08f4d 2021-01-17 op * copyright notice and this permission notice appear in all copies.
7 d3a08f4d 2021-01-17 op *
8 d3a08f4d 2021-01-17 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 d3a08f4d 2021-01-17 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 d3a08f4d 2021-01-17 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 d3a08f4d 2021-01-17 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 d3a08f4d 2021-01-17 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 d3a08f4d 2021-01-17 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 d3a08f4d 2021-01-17 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 d3a08f4d 2021-01-17 op */
16 52418c8d 2021-02-12 op
17 52418c8d 2021-02-12 op #include "gmid.h"
18 d3a08f4d 2021-01-17 op
19 d3a08f4d 2021-01-17 op #include <sys/stat.h>
20 d29a2ee2 2022-09-06 op #include <sys/un.h>
21 d3a08f4d 2021-01-17 op
22 d3a08f4d 2021-01-17 op #include <assert.h>
23 efe7d180 2021-10-02 op #include <ctype.h>
24 d3a08f4d 2021-01-17 op #include <errno.h>
25 abc007d2 2021-02-08 op #include <event.h>
26 d3a08f4d 2021-01-17 op #include <fcntl.h>
27 b4d409cf 2021-01-21 op #include <fnmatch.h>
28 2fafa2d2 2021-02-01 op #include <limits.h>
29 d3a08f4d 2021-01-17 op #include <string.h>
30 090b8a89 2021-07-06 op
31 efe7d180 2021-10-02 op #define MIN(a, b) ((a) < (b) ? (a) : (b))
32 efe7d180 2021-10-02 op
33 090b8a89 2021-07-06 op int shutting_down;
34 d3a08f4d 2021-01-17 op
35 bc99d868 2021-03-19 op static struct tls *ctx;
36 abc007d2 2021-02-08 op
37 bc99d868 2021-03-19 op static struct event e4, e6, imsgev, siginfo, sigusr2;
38 6b191ed5 2021-02-23 op static int has_ipv6, has_siginfo;
39 abc007d2 2021-02-08 op
40 d3a08f4d 2021-01-17 op int connected_clients;
41 d3a08f4d 2021-01-17 op
42 49b73ba1 2021-02-10 op static inline int matches(const char*, const char*);
43 49b73ba1 2021-02-10 op
44 fe406389 2021-02-02 op static int check_path(struct client*, const char*, int*);
45 abc007d2 2021-02-08 op static void open_file(struct client*);
46 abc007d2 2021-02-08 op static void handle_handshake(int, short, void*);
47 91b9f2a8 2021-05-15 op static const char *strip_path(const char*, int);
48 57ec3e77 2021-02-08 op static void fmt_sbuf(const char*, struct client*, const char*);
49 abc007d2 2021-02-08 op static int apply_block_return(struct client*);
50 d474a979 2022-01-04 op static int check_matching_certificate(X509_STORE *, struct client *);
51 72b033ef 2021-12-29 op static int apply_reverse_proxy(struct client *);
52 efe7d180 2021-10-02 op static int apply_fastcgi(struct client*);
53 02be96c6 2021-02-09 op static int apply_require_ca(struct client*);
54 abc007d2 2021-02-08 op static void open_dir(struct client*);
55 abc007d2 2021-02-08 op static void redirect_canonical_dir(struct client*);
56 efe7d180 2021-10-02 op
57 efe7d180 2021-10-02 op static void client_tls_readcb(int, short, void *);
58 efe7d180 2021-10-02 op static void client_tls_writecb(int, short, void *);
59 efe7d180 2021-10-02 op
60 efe7d180 2021-10-02 op static void client_read(struct bufferevent *, void *);
61 efe7d180 2021-10-02 op void client_write(struct bufferevent *, void *);
62 efe7d180 2021-10-02 op static void client_error(struct bufferevent *, short, void *);
63 efe7d180 2021-10-02 op
64 efe7d180 2021-10-02 op static void client_close_ev(int, short, void *);
65 efe7d180 2021-10-02 op
66 abc007d2 2021-02-08 op static void do_accept(int, short, void*);
67 efe7d180 2021-10-02 op
68 bc99d868 2021-03-19 op static void handle_imsg_quit(struct imsgbuf*, struct imsg*, size_t);
69 efe7d180 2021-10-02 op static void handle_dispatch_imsg(int, short, void *);
70 bc99d868 2021-03-19 op static void handle_siginfo(int, short, void*);
71 bc99d868 2021-03-19 op
72 bc99d868 2021-03-19 op static imsg_handlerfn *handlers[] = {
73 bc99d868 2021-03-19 op [IMSG_QUIT] = handle_imsg_quit,
74 bc99d868 2021-03-19 op };
75 207b3e80 2021-10-07 op
76 207b3e80 2021-10-07 op static uint32_t server_client_id;
77 207b3e80 2021-10-07 op
78 207b3e80 2021-10-07 op struct client_tree_id clients;
79 fe406389 2021-02-02 op
80 49b73ba1 2021-02-10 op static inline int
81 49b73ba1 2021-02-10 op matches(const char *pattern, const char *path)
82 49b73ba1 2021-02-10 op {
83 49b73ba1 2021-02-10 op if (*path == '/')
84 49b73ba1 2021-02-10 op path++;
85 49b73ba1 2021-02-10 op return !fnmatch(pattern, path, 0);
86 abc007d2 2021-02-08 op }
87 abc007d2 2021-02-08 op
88 c8b74339 2021-01-24 op const char *
89 c8b74339 2021-01-24 op vhost_lang(struct vhost *v, const char *path)
90 c8b74339 2021-01-24 op {
91 c8b74339 2021-01-24 op struct location *loc;
92 c8b74339 2021-01-24 op
93 caad0308 2021-01-27 op if (v == NULL || path == NULL)
94 6016a593 2021-01-30 op return NULL;
95 8443bff7 2021-01-25 op
96 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
97 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
98 cd761624 2021-02-06 op if (loc->lang != NULL) {
99 49b73ba1 2021-02-10 op if (matches(loc->match, path))
100 6016a593 2021-01-30 op return loc->lang;
101 c8b74339 2021-01-24 op }
102 c8b74339 2021-01-24 op }
103 c8b74339 2021-01-24 op
104 b8e64ccd 2021-03-31 op return TAILQ_FIRST(&v->locations)->lang;
105 c8b74339 2021-01-24 op }
106 c8b74339 2021-01-24 op
107 c8b74339 2021-01-24 op const char *
108 c8b74339 2021-01-24 op vhost_default_mime(struct vhost *v, const char *path)
109 c8b74339 2021-01-24 op {
110 c8b74339 2021-01-24 op struct location *loc;
111 c8b74339 2021-01-24 op const char *default_mime = "application/octet-stream";
112 caad0308 2021-01-27 op
113 caad0308 2021-01-27 op if (v == NULL || path == NULL)
114 caad0308 2021-01-27 op return default_mime;
115 c8b74339 2021-01-24 op
116 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
117 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
118 cd761624 2021-02-06 op if (loc->default_mime != NULL) {
119 49b73ba1 2021-02-10 op if (matches(loc->match, path))
120 6016a593 2021-01-30 op return loc->default_mime;
121 c8b74339 2021-01-24 op }
122 c8b74339 2021-01-24 op }
123 c8b74339 2021-01-24 op
124 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
125 b8e64ccd 2021-03-31 op if (loc->default_mime != NULL)
126 b8e64ccd 2021-03-31 op return loc->default_mime;
127 c8b74339 2021-01-24 op return default_mime;
128 c8b74339 2021-01-24 op }
129 c8b74339 2021-01-24 op
130 c8b74339 2021-01-24 op const char *
131 c8b74339 2021-01-24 op vhost_index(struct vhost *v, const char *path)
132 c8b74339 2021-01-24 op {
133 c8b74339 2021-01-24 op struct location *loc;
134 c8b74339 2021-01-24 op const char *index = "index.gmi";
135 c8b74339 2021-01-24 op
136 caad0308 2021-01-27 op if (v == NULL || path == NULL)
137 caad0308 2021-01-27 op return index;
138 caad0308 2021-01-27 op
139 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
140 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
141 cd761624 2021-02-06 op if (loc->index != NULL) {
142 49b73ba1 2021-02-10 op if (matches(loc->match, path))
143 6016a593 2021-01-30 op return loc->index;
144 c8b74339 2021-01-24 op }
145 c8b74339 2021-01-24 op }
146 c8b74339 2021-01-24 op
147 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
148 b8e64ccd 2021-03-31 op if (loc->index != NULL)
149 b8e64ccd 2021-03-31 op return loc->index;
150 c8b74339 2021-01-24 op return index;
151 c8b74339 2021-01-24 op }
152 c8b74339 2021-01-24 op
153 d3a08f4d 2021-01-17 op int
154 252908e6 2021-01-24 op vhost_auto_index(struct vhost *v, const char *path)
155 252908e6 2021-01-24 op {
156 252908e6 2021-01-24 op struct location *loc;
157 252908e6 2021-01-24 op
158 6016a593 2021-01-30 op if (v == NULL || path == NULL)
159 6016a593 2021-01-30 op return 0;
160 6016a593 2021-01-30 op
161 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
162 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
163 cd761624 2021-02-06 op if (loc->auto_index != 0) {
164 49b73ba1 2021-02-10 op if (matches(loc->match, path))
165 6016a593 2021-01-30 op return loc->auto_index == 1;
166 252908e6 2021-01-24 op }
167 252908e6 2021-01-24 op }
168 252908e6 2021-01-24 op
169 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
170 b8e64ccd 2021-03-31 op return loc->auto_index == 1;
171 6abda252 2021-02-06 op }
172 6abda252 2021-02-06 op
173 6abda252 2021-02-06 op int
174 6abda252 2021-02-06 op vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
175 6abda252 2021-02-06 op {
176 6abda252 2021-02-06 op struct location *loc;
177 6abda252 2021-02-06 op
178 6abda252 2021-02-06 op if (v == NULL || path == NULL)
179 6abda252 2021-02-06 op return 0;
180 6abda252 2021-02-06 op
181 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
182 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
183 cd761624 2021-02-06 op if (loc->block_code != 0) {
184 49b73ba1 2021-02-10 op if (matches(loc->match, path)) {
185 6abda252 2021-02-06 op *code = loc->block_code;
186 6abda252 2021-02-06 op *fmt = loc->block_fmt;
187 6abda252 2021-02-06 op return 1;
188 6abda252 2021-02-06 op }
189 6abda252 2021-02-06 op }
190 6abda252 2021-02-06 op }
191 6abda252 2021-02-06 op
192 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
193 b8e64ccd 2021-03-31 op *code = loc->block_code;
194 b8e64ccd 2021-03-31 op *fmt = loc->block_fmt;
195 b8e64ccd 2021-03-31 op return loc->block_code != 0;
196 72b033ef 2021-12-29 op }
197 72b033ef 2021-12-29 op
198 6abda252 2021-02-06 op int
199 8ad1c570 2021-05-09 op vhost_fastcgi(struct vhost *v, const char *path)
200 8ad1c570 2021-05-09 op {
201 8ad1c570 2021-05-09 op struct location *loc;
202 8ad1c570 2021-05-09 op
203 8ad1c570 2021-05-09 op if (v == NULL || path == NULL)
204 8ad1c570 2021-05-09 op return -1;
205 8ad1c570 2021-05-09 op
206 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
207 8ad1c570 2021-05-09 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
208 8ad1c570 2021-05-09 op if (loc->fcgi != -1)
209 8ad1c570 2021-05-09 op if (matches(loc->match, path))
210 8ad1c570 2021-05-09 op return loc->fcgi;
211 8ad1c570 2021-05-09 op }
212 8ad1c570 2021-05-09 op
213 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
214 8ad1c570 2021-05-09 op return loc->fcgi;
215 8ad1c570 2021-05-09 op }
216 8ad1c570 2021-05-09 op
217 8ad1c570 2021-05-09 op int
218 1feaf2a6 2021-05-15 op vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
219 fdea6aa0 2021-04-30 op {
220 fdea6aa0 2021-04-30 op struct location *loc;
221 1feaf2a6 2021-05-15 op size_t l = 0;
222 fdea6aa0 2021-04-30 op
223 fdea6aa0 2021-04-30 op if (v == NULL || path == NULL)
224 fdea6aa0 2021-04-30 op return -1;
225 fdea6aa0 2021-04-30 op
226 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
227 fdea6aa0 2021-04-30 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
228 1feaf2a6 2021-05-15 op l++;
229 fdea6aa0 2021-04-30 op if (loc->dirfd != -1)
230 1feaf2a6 2021-05-15 op if (matches(loc->match, path)) {
231 1feaf2a6 2021-05-15 op *retloc = l;
232 fdea6aa0 2021-04-30 op return loc->dirfd;
233 1feaf2a6 2021-05-15 op }
234 fdea6aa0 2021-04-30 op }
235 fdea6aa0 2021-04-30 op
236 1feaf2a6 2021-05-15 op *retloc = 0;
237 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
238 fdea6aa0 2021-04-30 op return loc->dirfd;
239 fdea6aa0 2021-04-30 op }
240 fdea6aa0 2021-04-30 op
241 fdea6aa0 2021-04-30 op int
242 6abda252 2021-02-06 op vhost_strip(struct vhost *v, const char *path)
243 6abda252 2021-02-06 op {
244 6abda252 2021-02-06 op struct location *loc;
245 6abda252 2021-02-06 op
246 6abda252 2021-02-06 op if (v == NULL || path == NULL)
247 6abda252 2021-02-06 op return 0;
248 6abda252 2021-02-06 op
249 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
250 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
251 cd761624 2021-02-06 op if (loc->strip != 0) {
252 49b73ba1 2021-02-10 op if (matches(loc->match, path))
253 6abda252 2021-02-06 op return loc->strip;
254 6abda252 2021-02-06 op }
255 6abda252 2021-02-06 op }
256 6abda252 2021-02-06 op
257 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
258 b8e64ccd 2021-03-31 op return loc->strip;
259 252908e6 2021-01-24 op }
260 252908e6 2021-01-24 op
261 02be96c6 2021-02-09 op X509_STORE *
262 02be96c6 2021-02-09 op vhost_require_ca(struct vhost *v, const char *path)
263 02be96c6 2021-02-09 op {
264 02be96c6 2021-02-09 op struct location *loc;
265 02be96c6 2021-02-09 op
266 02be96c6 2021-02-09 op if (v == NULL || path == NULL)
267 02be96c6 2021-02-09 op return NULL;
268 02be96c6 2021-02-09 op
269 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
270 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
271 02be96c6 2021-02-09 op if (loc->reqca != NULL) {
272 49b73ba1 2021-02-10 op if (matches(loc->match, path))
273 02be96c6 2021-02-09 op return loc->reqca;
274 02be96c6 2021-02-09 op }
275 02be96c6 2021-02-09 op }
276 02be96c6 2021-02-09 op
277 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
278 b8e64ccd 2021-03-31 op return loc->reqca;
279 793835cb 2021-02-23 op }
280 793835cb 2021-02-23 op
281 793835cb 2021-02-23 op int
282 793835cb 2021-02-23 op vhost_disable_log(struct vhost *v, const char *path)
283 793835cb 2021-02-23 op {
284 793835cb 2021-02-23 op struct location *loc;
285 793835cb 2021-02-23 op
286 793835cb 2021-02-23 op if (v == NULL || path == NULL)
287 793835cb 2021-02-23 op return 0;
288 793835cb 2021-02-23 op
289 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
290 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
291 793835cb 2021-02-23 op if (loc->disable_log && matches(loc->match, path))
292 793835cb 2021-02-23 op return 1;
293 793835cb 2021-02-23 op }
294 793835cb 2021-02-23 op
295 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
296 b8e64ccd 2021-03-31 op return loc->disable_log;
297 02be96c6 2021-02-09 op }
298 02be96c6 2021-02-09 op
299 fe406389 2021-02-02 op static int
300 d3a08f4d 2021-01-17 op check_path(struct client *c, const char *path, int *fd)
301 d3a08f4d 2021-01-17 op {
302 d3a08f4d 2021-01-17 op struct stat sb;
303 d1ca3911 2021-01-21 op const char *p;
304 efb48052 2021-07-27 op int dirfd, strip;
305 d3a08f4d 2021-01-17 op
306 d3a08f4d 2021-01-17 op assert(path != NULL);
307 d1ca3911 2021-01-21 op
308 fdea6aa0 2021-04-30 op /*
309 fdea6aa0 2021-04-30 op * in send_dir we add an initial / (to be redirect-friendly),
310 fdea6aa0 2021-04-30 op * but here we want to skip it
311 fdea6aa0 2021-04-30 op */
312 fdea6aa0 2021-04-30 op if (*path == '/')
313 fdea6aa0 2021-04-30 op path++;
314 fdea6aa0 2021-04-30 op
315 fdea6aa0 2021-04-30 op strip = vhost_strip(c->host, path);
316 fdea6aa0 2021-04-30 op p = strip_path(path, strip);
317 fdea6aa0 2021-04-30 op
318 fdea6aa0 2021-04-30 op if (*p == '/')
319 fdea6aa0 2021-04-30 op p = p+1;
320 fdea6aa0 2021-04-30 op if (*p == '\0')
321 d1ca3911 2021-01-21 op p = ".";
322 d1ca3911 2021-01-21 op
323 1feaf2a6 2021-05-15 op dirfd = vhost_dirfd(c->host, path, &c->loc);
324 fdea6aa0 2021-04-30 op log_debug(c, "check_path: strip=%d path=%s original=%s",
325 fdea6aa0 2021-04-30 op strip, p, path);
326 3bd4a6de 2022-07-04 op if (*fd == -1 && (*fd = openat(dirfd, p, O_RDONLY)) == -1) {
327 3bd4a6de 2022-07-04 op if (errno == EACCES)
328 3bd4a6de 2022-07-04 op log_info(c, "can't open %s: %s", p, strerror(errno));
329 d3a08f4d 2021-01-17 op return FILE_MISSING;
330 3bd4a6de 2022-07-04 op }
331 d3a08f4d 2021-01-17 op
332 d3a08f4d 2021-01-17 op if (fstat(*fd, &sb) == -1) {
333 3abf91b0 2021-02-07 op log_notice(c, "failed stat for %s: %s", path, strerror(errno));
334 d3a08f4d 2021-01-17 op return FILE_MISSING;
335 d3a08f4d 2021-01-17 op }
336 d3a08f4d 2021-01-17 op
337 d3a08f4d 2021-01-17 op if (S_ISDIR(sb.st_mode))
338 d3a08f4d 2021-01-17 op return FILE_DIRECTORY;
339 d3a08f4d 2021-01-17 op
340 d3a08f4d 2021-01-17 op return FILE_EXISTS;
341 d3a08f4d 2021-01-17 op }
342 d3a08f4d 2021-01-17 op
343 fe406389 2021-02-02 op static void
344 abc007d2 2021-02-08 op open_file(struct client *c)
345 d3a08f4d 2021-01-17 op {
346 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
347 d3a08f4d 2021-01-17 op case FILE_EXISTS:
348 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
349 27b2fa9a 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
350 07b0a142 2021-01-24 op return;
351 d3a08f4d 2021-01-17 op
352 d3a08f4d 2021-01-17 op case FILE_DIRECTORY:
353 abc007d2 2021-02-08 op open_dir(c);
354 07b0a142 2021-01-24 op return;
355 d3a08f4d 2021-01-17 op
356 d3a08f4d 2021-01-17 op case FILE_MISSING:
357 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
358 07b0a142 2021-01-24 op return;
359 d3a08f4d 2021-01-17 op
360 d3a08f4d 2021-01-17 op default:
361 d3a08f4d 2021-01-17 op /* unreachable */
362 d3a08f4d 2021-01-17 op abort();
363 252908e6 2021-01-24 op }
364 252908e6 2021-01-24 op }
365 252908e6 2021-01-24 op
366 9b8f5ed2 2021-02-03 op void
367 9b8f5ed2 2021-02-03 op mark_nonblock(int fd)
368 9b8f5ed2 2021-02-03 op {
369 9b8f5ed2 2021-02-03 op int flags;
370 9b8f5ed2 2021-02-03 op
371 9b8f5ed2 2021-02-03 op if ((flags = fcntl(fd, F_GETFL)) == -1)
372 9b8f5ed2 2021-02-03 op fatal("fcntl(F_GETFL): %s", strerror(errno));
373 9b8f5ed2 2021-02-03 op if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
374 9b8f5ed2 2021-02-03 op fatal("fcntl(F_SETFL): %s", strerror(errno));
375 9b8f5ed2 2021-02-03 op }
376 9b8f5ed2 2021-02-03 op
377 fe406389 2021-02-02 op static void
378 abc007d2 2021-02-08 op handle_handshake(int fd, short ev, void *d)
379 d3a08f4d 2021-01-17 op {
380 abc007d2 2021-02-08 op struct client *c = d;
381 d3a08f4d 2021-01-17 op struct vhost *h;
382 cc8c2901 2021-04-29 op struct alist *a;
383 d3a08f4d 2021-01-17 op const char *servname;
384 a8d4a897 2021-01-29 op const char *parse_err = "unknown error";
385 d3a08f4d 2021-01-17 op
386 d3a08f4d 2021-01-17 op switch (tls_handshake(c->ctx)) {
387 d3a08f4d 2021-01-17 op case 0: /* success */
388 d3a08f4d 2021-01-17 op case -1: /* already handshaked */
389 d3a08f4d 2021-01-17 op break;
390 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
391 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, handle_handshake, c, NULL);
392 d3a08f4d 2021-01-17 op return;
393 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
394 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
395 d3a08f4d 2021-01-17 op return;
396 d3a08f4d 2021-01-17 op default:
397 d3a08f4d 2021-01-17 op /* unreachable */
398 d3a08f4d 2021-01-17 op abort();
399 d3a08f4d 2021-01-17 op }
400 80444938 2021-10-15 op
401 80444938 2021-10-15 op c->bev = bufferevent_new(fd, client_read, client_write,
402 80444938 2021-10-15 op client_error, c);
403 80444938 2021-10-15 op if (c->bev == NULL)
404 80444938 2021-10-15 op fatal("%s: failed to allocate client buffer: %s",
405 80444938 2021-10-15 op __func__, strerror(errno));
406 d3a08f4d 2021-01-17 op
407 80444938 2021-10-15 op event_set(&c->bev->ev_read, c->fd, EV_READ,
408 80444938 2021-10-15 op client_tls_readcb, c->bev);
409 80444938 2021-10-15 op event_set(&c->bev->ev_write, c->fd, EV_WRITE,
410 80444938 2021-10-15 op client_tls_writecb, c->bev);
411 80444938 2021-10-15 op
412 80444938 2021-10-15 op #if HAVE_LIBEVENT2
413 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->input, 0);
414 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->output, 1);
415 80444938 2021-10-15 op #endif
416 80444938 2021-10-15 op
417 79288c8b 2021-09-24 op if ((servname = tls_conn_servername(c->ctx)) == NULL) {
418 79288c8b 2021-09-24 op log_debug(c, "handshake: missing SNI");
419 79288c8b 2021-09-24 op goto err;
420 79288c8b 2021-09-24 op }
421 79288c8b 2021-09-24 op
422 a8d4a897 2021-01-29 op if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
423 3abf91b0 2021-02-07 op log_info(c, "puny_decode: %s", parse_err);
424 a8d4a897 2021-01-29 op goto err;
425 a8d4a897 2021-01-29 op }
426 d3a08f4d 2021-01-17 op
427 b8e64ccd 2021-03-31 op TAILQ_FOREACH(h, &hosts, vhosts) {
428 eecad7a3 2021-02-12 op if (matches(h->domain, c->domain))
429 cc8c2901 2021-04-29 op goto found;
430 cc8c2901 2021-04-29 op TAILQ_FOREACH(a, &h->aliases, aliases) {
431 cc8c2901 2021-04-29 op if (matches(a->alias, c->domain))
432 cc8c2901 2021-04-29 op goto found;
433 cc8c2901 2021-04-29 op }
434 d3a08f4d 2021-01-17 op }
435 d3a08f4d 2021-01-17 op
436 cc8c2901 2021-04-29 op found:
437 3abf91b0 2021-02-07 op log_debug(c, "handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
438 3abf91b0 2021-02-07 op servname != NULL ? servname : "(null)",
439 3abf91b0 2021-02-07 op c->domain,
440 b8e64ccd 2021-03-31 op h != NULL ? h->domain : "(null)");
441 22c6d633 2021-01-27 op
442 b8e64ccd 2021-03-31 op if (h != NULL) {
443 d3a08f4d 2021-01-17 op c->host = h;
444 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EV_READ);
445 d3a08f4d 2021-01-17 op return;
446 d3a08f4d 2021-01-17 op }
447 d3a08f4d 2021-01-17 op
448 a8d4a897 2021-01-29 op err:
449 abc007d2 2021-02-08 op start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
450 6abda252 2021-02-06 op }
451 6abda252 2021-02-06 op
452 91b9f2a8 2021-05-15 op static const char *
453 91b9f2a8 2021-05-15 op strip_path(const char *path, int strip)
454 6abda252 2021-02-06 op {
455 57ec3e77 2021-02-08 op char *t;
456 6abda252 2021-02-06 op
457 6abda252 2021-02-06 op while (strip > 0) {
458 6abda252 2021-02-06 op if ((t = strchr(path, '/')) == NULL) {
459 6abda252 2021-02-06 op path = strchr(path, '\0');
460 6abda252 2021-02-06 op break;
461 6abda252 2021-02-06 op }
462 6abda252 2021-02-06 op path = t;
463 6abda252 2021-02-06 op strip--;
464 6abda252 2021-02-06 op }
465 57ec3e77 2021-02-08 op
466 57ec3e77 2021-02-08 op return path;
467 57ec3e77 2021-02-08 op }
468 57ec3e77 2021-02-08 op
469 57ec3e77 2021-02-08 op static void
470 57ec3e77 2021-02-08 op fmt_sbuf(const char *fmt, struct client *c, const char *path)
471 57ec3e77 2021-02-08 op {
472 57ec3e77 2021-02-08 op size_t i;
473 4842c72d 2021-10-18 op char buf[32];
474 6abda252 2021-02-06 op
475 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
476 6abda252 2021-02-06 op for (i = 0; *fmt; ++fmt) {
477 6abda252 2021-02-06 op if (i == sizeof(buf)-1 || *fmt == '%') {
478 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
479 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
480 6abda252 2021-02-06 op i = 0;
481 6abda252 2021-02-06 op }
482 6abda252 2021-02-06 op
483 6abda252 2021-02-06 op if (*fmt != '%') {
484 6abda252 2021-02-06 op buf[i++] = *fmt;
485 6abda252 2021-02-06 op continue;
486 6abda252 2021-02-06 op }
487 6abda252 2021-02-06 op
488 6abda252 2021-02-06 op switch (*++fmt) {
489 6abda252 2021-02-06 op case '%':
490 6abda252 2021-02-06 op strlcat(c->sbuf, "%", sizeof(c->sbuf));
491 6abda252 2021-02-06 op break;
492 6abda252 2021-02-06 op case 'p':
493 737a6b50 2021-04-30 op if (*path != '/')
494 737a6b50 2021-04-30 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
495 6abda252 2021-02-06 op strlcat(c->sbuf, path, sizeof(c->sbuf));
496 6abda252 2021-02-06 op break;
497 6abda252 2021-02-06 op case 'q':
498 6abda252 2021-02-06 op strlcat(c->sbuf, c->iri.query, sizeof(c->sbuf));
499 6abda252 2021-02-06 op break;
500 6abda252 2021-02-06 op case 'P':
501 6abda252 2021-02-06 op snprintf(buf, sizeof(buf), "%d", conf.port);
502 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
503 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
504 6abda252 2021-02-06 op break;
505 6abda252 2021-02-06 op case 'N':
506 6abda252 2021-02-06 op strlcat(c->sbuf, c->domain, sizeof(c->sbuf));
507 6abda252 2021-02-06 op break;
508 6abda252 2021-02-06 op default:
509 6abda252 2021-02-06 op fatal("%s: unknown fmt specifier %c",
510 6abda252 2021-02-06 op __func__, *fmt);
511 6abda252 2021-02-06 op }
512 6abda252 2021-02-06 op }
513 6abda252 2021-02-06 op
514 6abda252 2021-02-06 op if (i != 0)
515 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
516 57ec3e77 2021-02-08 op }
517 6abda252 2021-02-06 op
518 57ec3e77 2021-02-08 op /* 1 if a matching `block return' (and apply it), 0 otherwise */
519 57ec3e77 2021-02-08 op static int
520 57ec3e77 2021-02-08 op apply_block_return(struct client *c)
521 57ec3e77 2021-02-08 op {
522 57ec3e77 2021-02-08 op const char *fmt, *path;
523 57ec3e77 2021-02-08 op int code;
524 57ec3e77 2021-02-08 op
525 57ec3e77 2021-02-08 op if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
526 57ec3e77 2021-02-08 op return 0;
527 57ec3e77 2021-02-08 op
528 57ec3e77 2021-02-08 op path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
529 57ec3e77 2021-02-08 op fmt_sbuf(fmt, c, path);
530 57ec3e77 2021-02-08 op
531 abc007d2 2021-02-08 op start_reply(c, code, c->sbuf);
532 72b033ef 2021-12-29 op return 1;
533 b7967bc1 2021-01-02 op }
534 b7967bc1 2021-01-02 op
535 b7967bc1 2021-01-02 op static struct proxy *
536 b7967bc1 2021-01-02 op matched_proxy(struct client *c)
537 b7967bc1 2021-01-02 op {
538 b7967bc1 2021-01-02 op struct proxy *p;
539 b7967bc1 2021-01-02 op const char *proto;
540 b7967bc1 2021-01-02 op const char *host;
541 b7967bc1 2021-01-02 op const char *port;
542 b7967bc1 2021-01-02 op
543 b7967bc1 2021-01-02 op TAILQ_FOREACH(p, &c->host->proxies, proxies) {
544 b7967bc1 2021-01-02 op if ((proto = p->match_proto) == NULL)
545 b7967bc1 2021-01-02 op proto = "gemini";
546 b7967bc1 2021-01-02 op if ((host = p->match_host) == NULL)
547 b7967bc1 2021-01-02 op host = "*";
548 b7967bc1 2021-01-02 op if ((port = p->match_port) == NULL)
549 b7967bc1 2021-01-02 op port = "*";
550 b7967bc1 2021-01-02 op
551 b7967bc1 2021-01-02 op if (matches(proto, c->iri.schema) &&
552 b7967bc1 2021-01-02 op matches(host, c->domain) &&
553 b7967bc1 2021-01-02 op matches(port, c->iri.port))
554 b7967bc1 2021-01-02 op return p;
555 b7967bc1 2021-01-02 op }
556 b7967bc1 2021-01-02 op
557 b7967bc1 2021-01-02 op return NULL;
558 ba94a608 2022-01-04 op }
559 ba94a608 2022-01-04 op
560 ba94a608 2022-01-04 op static int
561 ba94a608 2022-01-04 op check_matching_certificate(X509_STORE *store, struct client *c)
562 ba94a608 2022-01-04 op {
563 ba94a608 2022-01-04 op const uint8_t *cert;
564 ba94a608 2022-01-04 op size_t len;
565 ba94a608 2022-01-04 op
566 ba94a608 2022-01-04 op if (!tls_peer_cert_provided(c->ctx)) {
567 ba94a608 2022-01-04 op start_reply(c, CLIENT_CERT_REQ, "client certificate required");
568 ba94a608 2022-01-04 op return 1;
569 ba94a608 2022-01-04 op }
570 ba94a608 2022-01-04 op
571 ba94a608 2022-01-04 op cert = tls_peer_cert_chain_pem(c->ctx, &len);
572 ba94a608 2022-01-04 op if (!validate_against_ca(store, cert, len)) {
573 ba94a608 2022-01-04 op start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
574 ba94a608 2022-01-04 op return 1;
575 ba94a608 2022-01-04 op }
576 ba94a608 2022-01-04 op
577 ba94a608 2022-01-04 op return 0;
578 72b033ef 2021-12-29 op }
579 72b033ef 2021-12-29 op
580 d29a2ee2 2022-09-06 op static int
581 d29a2ee2 2022-09-06 op proxy_socket(struct client *c, const char *host, const char *port)
582 d29a2ee2 2022-09-06 op {
583 d29a2ee2 2022-09-06 op struct addrinfo hints, *res, *res0;
584 d29a2ee2 2022-09-06 op int r, sock;
585 d29a2ee2 2022-09-06 op
586 d29a2ee2 2022-09-06 op memset(&hints, 0, sizeof(hints));
587 d29a2ee2 2022-09-06 op hints.ai_family = AF_UNSPEC;
588 d29a2ee2 2022-09-06 op hints.ai_socktype = SOCK_STREAM;
589 d29a2ee2 2022-09-06 op
590 d29a2ee2 2022-09-06 op /* XXX: asr_run? :> */
591 d29a2ee2 2022-09-06 op r = getaddrinfo(host, port, &hints, &res0);
592 d29a2ee2 2022-09-06 op if (r != 0) {
593 d29a2ee2 2022-09-06 op log_warn(c, "getaddrinfo(\"%s\", \"%s\"): %s",
594 d29a2ee2 2022-09-06 op host, port, gai_strerror(r));
595 d29a2ee2 2022-09-06 op return -1;
596 d29a2ee2 2022-09-06 op }
597 d29a2ee2 2022-09-06 op
598 d29a2ee2 2022-09-06 op for (res = res0; res; res = res->ai_next) {
599 d29a2ee2 2022-09-06 op sock = socket(res->ai_family, res->ai_socktype,
600 d29a2ee2 2022-09-06 op res->ai_protocol);
601 d29a2ee2 2022-09-06 op if (sock == -1)
602 d29a2ee2 2022-09-06 op continue;
603 d29a2ee2 2022-09-06 op
604 d29a2ee2 2022-09-06 op if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
605 d29a2ee2 2022-09-06 op close(sock);
606 d29a2ee2 2022-09-06 op sock = -1;
607 d29a2ee2 2022-09-06 op continue;
608 d29a2ee2 2022-09-06 op }
609 d29a2ee2 2022-09-06 op
610 d29a2ee2 2022-09-06 op break;
611 d29a2ee2 2022-09-06 op }
612 d29a2ee2 2022-09-06 op
613 d29a2ee2 2022-09-06 op freeaddrinfo(res0);
614 d29a2ee2 2022-09-06 op
615 d29a2ee2 2022-09-06 op if (sock == -1)
616 d29a2ee2 2022-09-06 op log_warn(c, "can't connect to %s:%s", host, port);
617 d29a2ee2 2022-09-06 op
618 d29a2ee2 2022-09-06 op return sock;
619 d29a2ee2 2022-09-06 op }
620 d29a2ee2 2022-09-06 op
621 72b033ef 2021-12-29 op /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
622 72b033ef 2021-12-29 op static int
623 72b033ef 2021-12-29 op apply_reverse_proxy(struct client *c)
624 72b033ef 2021-12-29 op {
625 7bdcc91e 2021-01-01 op struct proxy *p;
626 72b033ef 2021-12-29 op
627 b7967bc1 2021-01-02 op if ((p = matched_proxy(c)) == NULL)
628 72b033ef 2021-12-29 op return 0;
629 d49093c1 2021-01-01 op
630 b7967bc1 2021-01-02 op c->proxy = p;
631 b7967bc1 2021-01-02 op
632 ba94a608 2022-01-04 op if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
633 ba94a608 2022-01-04 op return 1;
634 ba94a608 2022-01-04 op
635 72b033ef 2021-12-29 op log_debug(c, "opening proxy connection for %s:%s",
636 7bdcc91e 2021-01-01 op p->host, p->port);
637 7bdcc91e 2021-01-01 op
638 d29a2ee2 2022-09-06 op if ((c->pfd = proxy_socket(c, p->host, p->port)) == -1) {
639 d29a2ee2 2022-09-06 op start_reply(c, PROXY_ERROR, "proxy error");
640 d29a2ee2 2022-09-06 op return 1;
641 d29a2ee2 2022-09-06 op }
642 72b033ef 2021-12-29 op
643 d29a2ee2 2022-09-06 op mark_nonblock(c->pfd);
644 d29a2ee2 2022-09-06 op if (proxy_init(c) == -1)
645 d29a2ee2 2022-09-06 op start_reply(c, PROXY_ERROR, "proxy error");
646 72b033ef 2021-12-29 op
647 8ad1c570 2021-05-09 op return 1;
648 8ad1c570 2021-05-09 op }
649 8ad1c570 2021-05-09 op
650 d29a2ee2 2022-09-06 op static int
651 d29a2ee2 2022-09-06 op fcgi_open_sock(struct fcgi *f)
652 d29a2ee2 2022-09-06 op {
653 d29a2ee2 2022-09-06 op struct sockaddr_un addr;
654 d29a2ee2 2022-09-06 op int fd;
655 d29a2ee2 2022-09-06 op
656 d29a2ee2 2022-09-06 op if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
657 d29a2ee2 2022-09-06 op log_err(NULL, "socket: %s", strerror(errno));
658 d29a2ee2 2022-09-06 op return -1;
659 d29a2ee2 2022-09-06 op }
660 d29a2ee2 2022-09-06 op
661 d29a2ee2 2022-09-06 op memset(&addr, 0, sizeof(addr));
662 d29a2ee2 2022-09-06 op addr.sun_family = AF_UNIX;
663 d29a2ee2 2022-09-06 op strlcpy(addr.sun_path, f->path, sizeof(addr.sun_path));
664 d29a2ee2 2022-09-06 op
665 d29a2ee2 2022-09-06 op if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
666 d29a2ee2 2022-09-06 op log_warn(NULL, "failed to connect to %s: %s", f->path,
667 d29a2ee2 2022-09-06 op strerror(errno));
668 d29a2ee2 2022-09-06 op close(fd);
669 d29a2ee2 2022-09-06 op return -1;
670 d29a2ee2 2022-09-06 op }
671 d29a2ee2 2022-09-06 op
672 d29a2ee2 2022-09-06 op return fd;
673 d29a2ee2 2022-09-06 op }
674 d29a2ee2 2022-09-06 op
675 d29a2ee2 2022-09-06 op static int
676 d29a2ee2 2022-09-06 op fcgi_open_conn(struct fcgi *f)
677 d29a2ee2 2022-09-06 op {
678 d29a2ee2 2022-09-06 op struct addrinfo hints, *servinfo, *p;
679 d29a2ee2 2022-09-06 op int r, sock;
680 d29a2ee2 2022-09-06 op
681 d29a2ee2 2022-09-06 op memset(&hints, 0, sizeof(hints));
682 d29a2ee2 2022-09-06 op hints.ai_family = AF_UNSPEC;
683 d29a2ee2 2022-09-06 op hints.ai_socktype = SOCK_STREAM;
684 d29a2ee2 2022-09-06 op hints.ai_flags = AI_ADDRCONFIG;
685 d29a2ee2 2022-09-06 op
686 d29a2ee2 2022-09-06 op if ((r = getaddrinfo(f->path, f->port, &hints, &servinfo)) != 0) {
687 d29a2ee2 2022-09-06 op log_warn(NULL, "getaddrinfo %s:%s: %s", f->path, f->port,
688 d29a2ee2 2022-09-06 op gai_strerror(r));
689 d29a2ee2 2022-09-06 op return -1;
690 d29a2ee2 2022-09-06 op }
691 d29a2ee2 2022-09-06 op
692 d29a2ee2 2022-09-06 op for (p = servinfo; p != NULL; p = p->ai_next) {
693 d29a2ee2 2022-09-06 op sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
694 d29a2ee2 2022-09-06 op if (sock == -1)
695 d29a2ee2 2022-09-06 op continue;
696 d29a2ee2 2022-09-06 op if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
697 d29a2ee2 2022-09-06 op close(sock);
698 d29a2ee2 2022-09-06 op continue;
699 d29a2ee2 2022-09-06 op }
700 d29a2ee2 2022-09-06 op break;
701 d29a2ee2 2022-09-06 op }
702 d29a2ee2 2022-09-06 op
703 d29a2ee2 2022-09-06 op if (p == NULL) {
704 d29a2ee2 2022-09-06 op log_warn(NULL, "couldn't connect to %s:%s", f->path, f->port);
705 d29a2ee2 2022-09-06 op sock = -1;
706 d29a2ee2 2022-09-06 op }
707 d29a2ee2 2022-09-06 op
708 d29a2ee2 2022-09-06 op freeaddrinfo(servinfo);
709 d29a2ee2 2022-09-06 op return sock;
710 d29a2ee2 2022-09-06 op }
711 d29a2ee2 2022-09-06 op
712 8ad1c570 2021-05-09 op /* 1 if matching `fcgi' (and apply it), 0 otherwise */
713 8ad1c570 2021-05-09 op static int
714 8ad1c570 2021-05-09 op apply_fastcgi(struct client *c)
715 8ad1c570 2021-05-09 op {
716 8ad1c570 2021-05-09 op int id;
717 8ad1c570 2021-05-09 op struct fcgi *f;
718 8ad1c570 2021-05-09 op
719 8ad1c570 2021-05-09 op if ((id = vhost_fastcgi(c->host, c->iri.path)) == -1)
720 8ad1c570 2021-05-09 op return 0;
721 8ad1c570 2021-05-09 op
722 4cd25209 2021-10-07 op f = &fcgi[id];
723 4cd25209 2021-10-07 op
724 d29a2ee2 2022-09-06 op log_debug(c, "opening fastcgi connection for (%s,%s)",
725 d29a2ee2 2022-09-06 op f->path, f->port);
726 8ad1c570 2021-05-09 op
727 d29a2ee2 2022-09-06 op if (f->port != NULL)
728 d29a2ee2 2022-09-06 op c->pfd = fcgi_open_sock(f);
729 d29a2ee2 2022-09-06 op else
730 d29a2ee2 2022-09-06 op c->pfd = fcgi_open_conn(f);
731 d29a2ee2 2022-09-06 op
732 d29a2ee2 2022-09-06 op if (c->pfd == -1) {
733 d29a2ee2 2022-09-06 op start_reply(c, CGI_ERROR, "CGI error");
734 d29a2ee2 2022-09-06 op return 1;
735 d29a2ee2 2022-09-06 op }
736 d29a2ee2 2022-09-06 op
737 d29a2ee2 2022-09-06 op mark_nonblock(c->pfd);
738 d29a2ee2 2022-09-06 op
739 d29a2ee2 2022-09-06 op c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
740 d29a2ee2 2022-09-06 op fcgi_error, c);
741 d29a2ee2 2022-09-06 op if (c->cgibev == NULL) {
742 d29a2ee2 2022-09-06 op start_reply(c, TEMP_FAILURE, "internal server error");
743 d29a2ee2 2022-09-06 op return 1;
744 d29a2ee2 2022-09-06 op }
745 d29a2ee2 2022-09-06 op
746 d29a2ee2 2022-09-06 op bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
747 d29a2ee2 2022-09-06 op fcgi_req(c);
748 d29a2ee2 2022-09-06 op
749 6abda252 2021-02-06 op return 1;
750 d3a08f4d 2021-01-17 op }
751 d3a08f4d 2021-01-17 op
752 02be96c6 2021-02-09 op /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
753 02be96c6 2021-02-09 op static int
754 02be96c6 2021-02-09 op apply_require_ca(struct client *c)
755 02be96c6 2021-02-09 op {
756 02be96c6 2021-02-09 op X509_STORE *store;
757 02be96c6 2021-02-09 op
758 02be96c6 2021-02-09 op if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
759 02be96c6 2021-02-09 op return 0;
760 ba94a608 2022-01-04 op return check_matching_certificate(store, c);
761 02be96c6 2021-02-09 op }
762 02be96c6 2021-02-09 op
763 fe406389 2021-02-02 op static void
764 abc007d2 2021-02-08 op open_dir(struct client *c)
765 d3a08f4d 2021-01-17 op {
766 d3a08f4d 2021-01-17 op size_t len;
767 11c98667 2021-04-25 op int dirfd, root;
768 252908e6 2021-01-24 op char *before_file;
769 11c98667 2021-04-25 op
770 d29a2ee2 2022-09-06 op log_debug(c, "in open_dir");
771 d29a2ee2 2022-09-06 op
772 11c98667 2021-04-25 op root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
773 d1ca3911 2021-01-21 op
774 0be51733 2021-01-20 op len = strlen(c->iri.path);
775 252908e6 2021-01-24 op if (len > 0 && !ends_with(c->iri.path, "/")) {
776 abc007d2 2021-02-08 op redirect_canonical_dir(c);
777 0be51733 2021-01-20 op return;
778 d3a08f4d 2021-01-17 op }
779 d3a08f4d 2021-01-17 op
780 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
781 d1ca3911 2021-01-21 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
782 d1ca3911 2021-01-21 op if (!ends_with(c->sbuf, "/"))
783 0be51733 2021-01-20 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
784 252908e6 2021-01-24 op before_file = strchr(c->sbuf, '\0');
785 c8b74339 2021-01-24 op len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
786 c8b74339 2021-01-24 op sizeof(c->sbuf));
787 252908e6 2021-01-24 op if (len >= sizeof(c->sbuf)) {
788 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
789 252908e6 2021-01-24 op return;
790 252908e6 2021-01-24 op }
791 d3a08f4d 2021-01-17 op
792 252908e6 2021-01-24 op c->iri.path = c->sbuf;
793 252908e6 2021-01-24 op
794 252908e6 2021-01-24 op /* close later unless we have to generate the dir listing */
795 abc007d2 2021-02-08 op dirfd = c->pfd;
796 abc007d2 2021-02-08 op c->pfd = -1;
797 252908e6 2021-01-24 op
798 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
799 252908e6 2021-01-24 op case FILE_EXISTS:
800 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
801 98ee8406 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
802 252908e6 2021-01-24 op break;
803 252908e6 2021-01-24 op
804 252908e6 2021-01-24 op case FILE_DIRECTORY:
805 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
806 252908e6 2021-01-24 op break;
807 252908e6 2021-01-24 op
808 252908e6 2021-01-24 op case FILE_MISSING:
809 252908e6 2021-01-24 op *before_file = '\0';
810 252908e6 2021-01-24 op
811 252908e6 2021-01-24 op if (!vhost_auto_index(c->host, c->iri.path)) {
812 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
813 252908e6 2021-01-24 op break;
814 252908e6 2021-01-24 op }
815 252908e6 2021-01-24 op
816 efe7d180 2021-10-02 op c->type = REQUEST_DIR;
817 252908e6 2021-01-24 op
818 e76f2c74 2021-04-25 op c->dirlen = scandir_fd(dirfd, &c->dir,
819 11c98667 2021-04-25 op root ? select_non_dotdot : select_non_dot,
820 11c98667 2021-04-25 op alphasort);
821 11c98667 2021-04-25 op if (c->dirlen == -1) {
822 11c98667 2021-04-25 op log_err(c, "scandir_fd(%d) (vhost:%s) %s: %s",
823 abc007d2 2021-02-08 op c->pfd, c->host->domain, c->iri.path, strerror(errno));
824 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
825 252908e6 2021-01-24 op return;
826 252908e6 2021-01-24 op }
827 11c98667 2021-04-25 op c->diroff = 0;
828 252908e6 2021-01-24 op c->off = 0;
829 252908e6 2021-01-24 op
830 4842c72d 2021-10-18 op start_reply(c, SUCCESS, "text/gemini");
831 efe7d180 2021-10-02 op evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
832 efe7d180 2021-10-02 op "# Index of %s\n\n", c->iri.path);
833 252908e6 2021-01-24 op return;
834 252908e6 2021-01-24 op
835 252908e6 2021-01-24 op default:
836 252908e6 2021-01-24 op /* unreachable */
837 252908e6 2021-01-24 op abort();
838 252908e6 2021-01-24 op }
839 252908e6 2021-01-24 op
840 252908e6 2021-01-24 op close(dirfd);
841 252908e6 2021-01-24 op }
842 252908e6 2021-01-24 op
843 fe406389 2021-02-02 op static void
844 abc007d2 2021-02-08 op redirect_canonical_dir(struct client *c)
845 252908e6 2021-01-24 op {
846 252908e6 2021-01-24 op size_t len;
847 252908e6 2021-01-24 op
848 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
849 252908e6 2021-01-24 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
850 252908e6 2021-01-24 op len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
851 252908e6 2021-01-24 op
852 0be51733 2021-01-20 op if (len >= sizeof(c->sbuf)) {
853 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
854 0be51733 2021-01-20 op return;
855 0be51733 2021-01-20 op }
856 0be51733 2021-01-20 op
857 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
858 d3a08f4d 2021-01-17 op }
859 5f715ce4 2021-02-02 op
860 fe406389 2021-02-02 op static void
861 efe7d180 2021-10-02 op client_tls_readcb(int fd, short event, void *d)
862 5f715ce4 2021-02-02 op {
863 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
864 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
865 efe7d180 2021-10-02 op ssize_t ret;
866 efe7d180 2021-10-02 op size_t len;
867 efe7d180 2021-10-02 op int what = EVBUFFER_READ;
868 efe7d180 2021-10-02 op int howmuch = IBUF_READ_SIZE;
869 efe7d180 2021-10-02 op char buf[IBUF_READ_SIZE];
870 d3a08f4d 2021-01-17 op
871 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
872 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
873 efe7d180 2021-10-02 op goto err;
874 5f715ce4 2021-02-02 op }
875 5f715ce4 2021-02-02 op
876 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0)
877 efe7d180 2021-10-02 op howmuch = MIN(sizeof(buf), bufev->wm_read.high);
878 5f715ce4 2021-02-02 op
879 efe7d180 2021-10-02 op switch (ret = tls_read(client->ctx, buf, howmuch)) {
880 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
881 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
882 efe7d180 2021-10-02 op goto retry;
883 efe7d180 2021-10-02 op case -1:
884 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
885 efe7d180 2021-10-02 op goto err;
886 efe7d180 2021-10-02 op }
887 efe7d180 2021-10-02 op len = ret;
888 5f715ce4 2021-02-02 op
889 efe7d180 2021-10-02 op if (len == 0) {
890 efe7d180 2021-10-02 op what |= EVBUFFER_EOF;
891 efe7d180 2021-10-02 op goto err;
892 5f715ce4 2021-02-02 op }
893 5f715ce4 2021-02-02 op
894 efe7d180 2021-10-02 op if (evbuffer_add(bufev->input, buf, len) == -1) {
895 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
896 efe7d180 2021-10-02 op goto err;
897 efe7d180 2021-10-02 op }
898 5f715ce4 2021-02-02 op
899 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
900 efe7d180 2021-10-02 op if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
901 efe7d180 2021-10-02 op return;
902 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
903 efe7d180 2021-10-02 op /*
904 efe7d180 2021-10-02 op * here we could implement a read pressure policy.
905 efe7d180 2021-10-02 op */
906 efe7d180 2021-10-02 op }
907 252908e6 2021-01-24 op
908 efe7d180 2021-10-02 op if (bufev->readcb != NULL)
909 efe7d180 2021-10-02 op (*bufev->readcb)(bufev, bufev->cbarg);
910 11c98667 2021-04-25 op
911 efe7d180 2021-10-02 op return;
912 11c98667 2021-04-25 op
913 efe7d180 2021-10-02 op retry:
914 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
915 efe7d180 2021-10-02 op return;
916 efe7d180 2021-10-02 op
917 efe7d180 2021-10-02 op err:
918 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
919 252908e6 2021-01-24 op }
920 252908e6 2021-01-24 op
921 fe406389 2021-02-02 op static void
922 efe7d180 2021-10-02 op client_tls_writecb(int fd, short event, void *d)
923 252908e6 2021-01-24 op {
924 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
925 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
926 efe7d180 2021-10-02 op ssize_t ret;
927 efe7d180 2021-10-02 op size_t len;
928 efe7d180 2021-10-02 op short what = EVBUFFER_WRITE;
929 252908e6 2021-01-24 op
930 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
931 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
932 efe7d180 2021-10-02 op goto err;
933 efe7d180 2021-10-02 op }
934 252908e6 2021-01-24 op
935 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0) {
936 efe7d180 2021-10-02 op ret = tls_write(client->ctx,
937 efe7d180 2021-10-02 op EVBUFFER_DATA(bufev->output),
938 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output));
939 efe7d180 2021-10-02 op switch (ret) {
940 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
941 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
942 efe7d180 2021-10-02 op goto retry;
943 efe7d180 2021-10-02 op case -1:
944 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
945 efe7d180 2021-10-02 op goto err;
946 252908e6 2021-01-24 op }
947 efe7d180 2021-10-02 op len = ret;
948 efe7d180 2021-10-02 op evbuffer_drain(bufev->output, len);
949 252908e6 2021-01-24 op }
950 252908e6 2021-01-24 op
951 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0)
952 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
953 efe7d180 2021-10-02 op
954 efe7d180 2021-10-02 op if (bufev->writecb != NULL &&
955 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
956 efe7d180 2021-10-02 op (*bufev->writecb)(bufev, bufev->cbarg);
957 efe7d180 2021-10-02 op return;
958 efe7d180 2021-10-02 op
959 efe7d180 2021-10-02 op retry:
960 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
961 efe7d180 2021-10-02 op return;
962 efe7d180 2021-10-02 op err:
963 efe7d180 2021-10-02 op log_err(client, "tls error: %s", tls_error(client->ctx));
964 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
965 252908e6 2021-01-24 op }
966 252908e6 2021-01-24 op
967 fe406389 2021-02-02 op static void
968 efe7d180 2021-10-02 op client_read(struct bufferevent *bev, void *d)
969 3309ef97 2021-01-23 op {
970 efe7d180 2021-10-02 op struct client *c = d;
971 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
972 efe7d180 2021-10-02 op const char *parse_err = "invalid request";
973 efe7d180 2021-10-02 op char decoded[DOMAIN_NAME_LEN];
974 efe7d180 2021-10-02 op size_t len;
975 3309ef97 2021-01-23 op
976 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ);
977 901905e0 2022-01-05 op
978 901905e0 2022-01-05 op /*
979 901905e0 2022-01-05 op * libevent2 can still somehow call this function, even
980 901905e0 2022-01-05 op * though I never enable EV_READ in the bufferevent. If
981 901905e0 2022-01-05 op * that's the case, bail out.
982 901905e0 2022-01-05 op */
983 901905e0 2022-01-05 op if (c->type != REQUEST_UNDECIDED)
984 901905e0 2022-01-05 op return;
985 abc007d2 2021-02-08 op
986 efe7d180 2021-10-02 op /* max url len + \r\n */
987 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(src) > 1024 + 2) {
988 efe7d180 2021-10-02 op log_err(c, "too much data received");
989 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "bad request");
990 efe7d180 2021-10-02 op return;
991 efe7d180 2021-10-02 op }
992 3309ef97 2021-01-23 op
993 efe7d180 2021-10-02 op c->req = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
994 efe7d180 2021-10-02 op if (c->req == NULL) {
995 efe7d180 2021-10-02 op /* not enough data yet. */
996 efe7d180 2021-10-02 op bufferevent_enable(bev, EVBUFFER_READ);
997 ea27eaaa 2022-03-27 op return;
998 ea27eaaa 2022-03-27 op }
999 ea27eaaa 2022-03-27 op c->reqlen = strlen(c->req);
1000 ea27eaaa 2022-03-27 op if (c->reqlen > 1024+2) {
1001 ea27eaaa 2022-03-27 op log_err(c, "URL too long");
1002 ea27eaaa 2022-03-27 op start_reply(c, BAD_REQUEST, "bad request");
1003 35744950 2021-02-01 op return;
1004 3309ef97 2021-01-23 op }
1005 3309ef97 2021-01-23 op
1006 efe7d180 2021-10-02 op if (!parse_iri(c->req, &c->iri, &parse_err) ||
1007 efe7d180 2021-10-02 op !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
1008 efe7d180 2021-10-02 op log_err(c, "IRI parse error: %s", parse_err);
1009 807a80cb 2021-10-06 op start_reply(c, BAD_REQUEST, "bad request");
1010 efe7d180 2021-10-02 op return;
1011 efe7d180 2021-10-02 op }
1012 3309ef97 2021-01-23 op
1013 72b033ef 2021-12-29 op if (apply_reverse_proxy(c))
1014 72b033ef 2021-12-29 op return;
1015 72b033ef 2021-12-29 op
1016 52c92ef6 2021-12-09 op /* ignore the port number */
1017 52c92ef6 2021-12-09 op if (strcmp(c->iri.schema, "gemini") ||
1018 efe7d180 2021-10-02 op strcmp(decoded, c->domain)) {
1019 efe7d180 2021-10-02 op start_reply(c, PROXY_REFUSED, "won't proxy request");
1020 efe7d180 2021-10-02 op return;
1021 efe7d180 2021-10-02 op }
1022 3309ef97 2021-01-23 op
1023 efe7d180 2021-10-02 op if (apply_require_ca(c) ||
1024 efe7d180 2021-10-02 op apply_block_return(c)||
1025 efe7d180 2021-10-02 op apply_fastcgi(c))
1026 35744950 2021-02-01 op return;
1027 efe7d180 2021-10-02 op
1028 efe7d180 2021-10-02 op open_file(c);
1029 3309ef97 2021-01-23 op }
1030 3309ef97 2021-01-23 op
1031 efe7d180 2021-10-02 op void
1032 efe7d180 2021-10-02 op client_write(struct bufferevent *bev, void *d)
1033 d3a08f4d 2021-01-17 op {
1034 efe7d180 2021-10-02 op struct client *c = d;
1035 efe7d180 2021-10-02 op struct evbuffer *out = EVBUFFER_OUTPUT(bev);
1036 f2f8eb35 2022-07-04 op char nam[PATH_MAX];
1037 efe7d180 2021-10-02 op char buf[BUFSIZ];
1038 efe7d180 2021-10-02 op ssize_t r;
1039 d3a08f4d 2021-01-17 op
1040 efe7d180 2021-10-02 op switch (c->type) {
1041 efe7d180 2021-10-02 op case REQUEST_UNDECIDED:
1042 efe7d180 2021-10-02 op /*
1043 efe7d180 2021-10-02 op * Ignore spurious calls when we still don't have idea
1044 efe7d180 2021-10-02 op * what to do with the request.
1045 efe7d180 2021-10-02 op */
1046 efe7d180 2021-10-02 op break;
1047 d3a08f4d 2021-01-17 op
1048 efe7d180 2021-10-02 op case REQUEST_FILE:
1049 efe7d180 2021-10-02 op if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1050 efe7d180 2021-10-02 op log_warn(c, "read: %s", strerror(errno));
1051 efe7d180 2021-10-02 op client_error(bev, EVBUFFER_ERROR, c);
1052 efe7d180 2021-10-02 op return;
1053 efe7d180 2021-10-02 op } else if (r == 0) {
1054 efe7d180 2021-10-02 op client_close(c);
1055 efe7d180 2021-10-02 op return;
1056 efe7d180 2021-10-02 op } else if (r != sizeof(buf))
1057 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1058 efe7d180 2021-10-02 op bufferevent_write(bev, buf, r);
1059 efe7d180 2021-10-02 op break;
1060 d3a08f4d 2021-01-17 op
1061 efe7d180 2021-10-02 op case REQUEST_DIR:
1062 efe7d180 2021-10-02 op /* TODO: handle big big directories better */
1063 efe7d180 2021-10-02 op for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1064 543f4a66 2022-07-04 op const char *sufx = "";
1065 543f4a66 2022-07-04 op
1066 f2f8eb35 2022-07-04 op encode_path(nam, sizeof(nam),
1067 efe7d180 2021-10-02 op c->dir[c->diroff]->d_name);
1068 543f4a66 2022-07-04 op if (c->dir[c->diroff]->d_type == DT_DIR)
1069 543f4a66 2022-07-04 op sufx = "/";
1070 543f4a66 2022-07-04 op evbuffer_add_printf(out, "=> ./%s%s\n", nam, sufx);
1071 efe7d180 2021-10-02 op free(c->dir[c->diroff]);
1072 d3a08f4d 2021-01-17 op }
1073 efe7d180 2021-10-02 op free(c->dir);
1074 efe7d180 2021-10-02 op c->dir = NULL;
1075 27b2fa9a 2021-02-12 op
1076 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1077 efe7d180 2021-10-02 op
1078 efe7d180 2021-10-02 op event_add(&c->bev->ev_write, NULL);
1079 efe7d180 2021-10-02 op break;
1080 efe7d180 2021-10-02 op
1081 efe7d180 2021-10-02 op case REQUEST_FCGI:
1082 72b033ef 2021-12-29 op case REQUEST_PROXY:
1083 efe7d180 2021-10-02 op /*
1084 d29a2ee2 2022-09-06 op * Here we depend on fastcgi or proxy connection to
1085 d29a2ee2 2022-09-06 op * provide data.
1086 efe7d180 2021-10-02 op */
1087 efe7d180 2021-10-02 op break;
1088 efe7d180 2021-10-02 op
1089 efe7d180 2021-10-02 op case REQUEST_DONE:
1090 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(out) == 0)
1091 efe7d180 2021-10-02 op client_close(c);
1092 efe7d180 2021-10-02 op break;
1093 d3a08f4d 2021-01-17 op }
1094 efe7d180 2021-10-02 op }
1095 d3a08f4d 2021-01-17 op
1096 efe7d180 2021-10-02 op static void
1097 efe7d180 2021-10-02 op client_error(struct bufferevent *bev, short error, void *d)
1098 efe7d180 2021-10-02 op {
1099 efe7d180 2021-10-02 op struct client *c = d;
1100 efe7d180 2021-10-02 op
1101 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1102 efe7d180 2021-10-02 op
1103 efe7d180 2021-10-02 op if (error & EVBUFFER_TIMEOUT) {
1104 efe7d180 2021-10-02 op log_warn(c, "timeout reached, "
1105 efe7d180 2021-10-02 op "forcefully closing the connection");
1106 efe7d180 2021-10-02 op if (c->code == 0)
1107 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "timeout");
1108 efe7d180 2021-10-02 op else
1109 efe7d180 2021-10-02 op client_close(c);
1110 efe7d180 2021-10-02 op return;
1111 efe7d180 2021-10-02 op }
1112 efe7d180 2021-10-02 op
1113 efe7d180 2021-10-02 op if (error & EVBUFFER_EOF) {
1114 efe7d180 2021-10-02 op client_close(c);
1115 efe7d180 2021-10-02 op return;
1116 efe7d180 2021-10-02 op }
1117 efe7d180 2021-10-02 op
1118 d98ae929 2022-02-19 op log_err(c, "unknown bufferevent error %x", error);
1119 efe7d180 2021-10-02 op client_close(c);
1120 d3a08f4d 2021-01-17 op }
1121 d3a08f4d 2021-01-17 op
1122 8ad1c570 2021-05-09 op void
1123 efe7d180 2021-10-02 op start_reply(struct client *c, int code, const char *meta)
1124 d3a08f4d 2021-01-17 op {
1125 efe7d180 2021-10-02 op struct evbuffer *evb = EVBUFFER_OUTPUT(c->bev);
1126 efe7d180 2021-10-02 op const char *lang;
1127 efe7d180 2021-10-02 op int r, rr;
1128 efe7d180 2021-10-02 op
1129 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EVBUFFER_WRITE);
1130 efe7d180 2021-10-02 op
1131 efe7d180 2021-10-02 op c->code = code;
1132 efe7d180 2021-10-02 op c->meta = meta;
1133 efe7d180 2021-10-02 op
1134 efe7d180 2021-10-02 op r = evbuffer_add_printf(evb, "%d %s", code, meta);
1135 efe7d180 2021-10-02 op if (r == -1)
1136 efe7d180 2021-10-02 op goto err;
1137 efe7d180 2021-10-02 op
1138 efe7d180 2021-10-02 op /* 2 digit status + space + 1024 max reply */
1139 efe7d180 2021-10-02 op if (r > 1027)
1140 efe7d180 2021-10-02 op goto overflow;
1141 efe7d180 2021-10-02 op
1142 d29a2ee2 2022-09-06 op if (c->type != REQUEST_FCGI &&
1143 72b033ef 2021-12-29 op c->type != REQUEST_PROXY &&
1144 efe7d180 2021-10-02 op !strcmp(meta, "text/gemini") &&
1145 efe7d180 2021-10-02 op (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1146 4842c72d 2021-10-18 op rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1147 efe7d180 2021-10-02 op if (rr == -1)
1148 efe7d180 2021-10-02 op goto err;
1149 efe7d180 2021-10-02 op if (r + rr > 1027)
1150 efe7d180 2021-10-02 op goto overflow;
1151 efe7d180 2021-10-02 op }
1152 efe7d180 2021-10-02 op
1153 efe7d180 2021-10-02 op bufferevent_write(c->bev, "\r\n", 2);
1154 efe7d180 2021-10-02 op
1155 efe7d180 2021-10-02 op if (!vhost_disable_log(c->host, c->iri.path))
1156 efe7d180 2021-10-02 op log_request(c, EVBUFFER_DATA(evb), EVBUFFER_LENGTH(evb));
1157 efe7d180 2021-10-02 op
1158 d28bd963 2022-01-27 op if (code != 20)
1159 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1160 efe7d180 2021-10-02 op
1161 efe7d180 2021-10-02 op return;
1162 efe7d180 2021-10-02 op
1163 efe7d180 2021-10-02 op err:
1164 efe7d180 2021-10-02 op log_err(c, "evbuffer_add_printf error: no memory");
1165 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1166 efe7d180 2021-10-02 op client_close(c);
1167 efe7d180 2021-10-02 op return;
1168 efe7d180 2021-10-02 op
1169 efe7d180 2021-10-02 op overflow:
1170 efe7d180 2021-10-02 op log_warn(c, "reply header overflow");
1171 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1172 efe7d180 2021-10-02 op start_reply(c, TEMP_FAILURE, "internal error");
1173 efe7d180 2021-10-02 op }
1174 efe7d180 2021-10-02 op
1175 efe7d180 2021-10-02 op static void
1176 efe7d180 2021-10-02 op client_close_ev(int fd, short event, void *d)
1177 efe7d180 2021-10-02 op {
1178 8ad1c570 2021-05-09 op struct client *c = d;
1179 d3a08f4d 2021-01-17 op
1180 d3a08f4d 2021-01-17 op switch (tls_close(c->ctx)) {
1181 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
1182 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1183 efe7d180 2021-10-02 op break;
1184 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
1185 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1186 efe7d180 2021-10-02 op break;
1187 d3a08f4d 2021-01-17 op }
1188 d3a08f4d 2021-01-17 op
1189 d3a08f4d 2021-01-17 op connected_clients--;
1190 e4daebe4 2021-10-06 op
1191 e4daebe4 2021-10-06 op free(c->req);
1192 d3a08f4d 2021-01-17 op
1193 d3a08f4d 2021-01-17 op tls_free(c->ctx);
1194 d3a08f4d 2021-01-17 op c->ctx = NULL;
1195 d3a08f4d 2021-01-17 op
1196 efe7d180 2021-10-02 op free(c->header);
1197 efe7d180 2021-10-02 op
1198 abc007d2 2021-02-08 op if (c->pfd != -1)
1199 abc007d2 2021-02-08 op close(c->pfd);
1200 d3a08f4d 2021-01-17 op
1201 252908e6 2021-01-24 op if (c->dir != NULL)
1202 11c98667 2021-04-25 op free(c->dir);
1203 252908e6 2021-01-24 op
1204 abc007d2 2021-02-08 op close(c->fd);
1205 abc007d2 2021-02-08 op c->fd = -1;
1206 72b033ef 2021-12-29 op }
1207 72b033ef 2021-12-29 op
1208 72b033ef 2021-12-29 op static void
1209 72b033ef 2021-12-29 op client_proxy_close(int fd, short event, void *d)
1210 72b033ef 2021-12-29 op {
1211 72b033ef 2021-12-29 op struct tls *ctx = d;
1212 72b033ef 2021-12-29 op
1213 72b033ef 2021-12-29 op if (ctx == NULL) {
1214 72b033ef 2021-12-29 op close(fd);
1215 72b033ef 2021-12-29 op return;
1216 72b033ef 2021-12-29 op }
1217 72b033ef 2021-12-29 op
1218 72b033ef 2021-12-29 op switch (tls_close(ctx)) {
1219 72b033ef 2021-12-29 op case TLS_WANT_POLLIN:
1220 72b033ef 2021-12-29 op event_once(fd, EV_READ, client_proxy_close, d, NULL);
1221 72b033ef 2021-12-29 op break;
1222 72b033ef 2021-12-29 op case TLS_WANT_POLLOUT:
1223 72b033ef 2021-12-29 op event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1224 72b033ef 2021-12-29 op break;
1225 72b033ef 2021-12-29 op }
1226 72b033ef 2021-12-29 op
1227 72b033ef 2021-12-29 op tls_free(ctx);
1228 72b033ef 2021-12-29 op close(fd);
1229 f890c8c5 2021-01-22 op }
1230 f890c8c5 2021-01-22 op
1231 efe7d180 2021-10-02 op void
1232 efe7d180 2021-10-02 op client_close(struct client *c)
1233 efe7d180 2021-10-02 op {
1234 efe7d180 2021-10-02 op /*
1235 efe7d180 2021-10-02 op * We may end up calling client_close in various situations
1236 efe7d180 2021-10-02 op * and for the most unexpected reasons. Therefore, we need to
1237 b9b77f53 2022-01-27 op * ensure that everything gets properly released once we reach
1238 efe7d180 2021-10-02 op * this point.
1239 efe7d180 2021-10-02 op */
1240 207b3e80 2021-10-07 op
1241 207b3e80 2021-10-07 op SPLAY_REMOVE(client_tree_id, &clients, c);
1242 efe7d180 2021-10-02 op
1243 efe7d180 2021-10-02 op if (c->cgibev != NULL) {
1244 efe7d180 2021-10-02 op bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1245 efe7d180 2021-10-02 op bufferevent_free(c->cgibev);
1246 efe7d180 2021-10-02 op c->cgibev = NULL;
1247 efe7d180 2021-10-02 op close(c->pfd);
1248 efe7d180 2021-10-02 op c->pfd = -1;
1249 efe7d180 2021-10-02 op }
1250 efe7d180 2021-10-02 op
1251 efe7d180 2021-10-02 op bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1252 efe7d180 2021-10-02 op bufferevent_free(c->bev);
1253 efe7d180 2021-10-02 op c->bev = NULL;
1254 efe7d180 2021-10-02 op
1255 e0f6dc64 2022-01-27 op if (c->proxyevset &&
1256 e0f6dc64 2022-01-27 op event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1257 e0f6dc64 2022-01-27 op c->proxyevset = 0;
1258 e0f6dc64 2022-01-27 op event_del(&c->proxyev);
1259 e0f6dc64 2022-01-27 op }
1260 72b033ef 2021-12-29 op
1261 e0f6dc64 2022-01-27 op if (c->pfd != -1 && c->proxyctx != NULL) {
1262 e0f6dc64 2022-01-27 op /* shut down the proxy TLS connection */
1263 e0f6dc64 2022-01-27 op client_proxy_close(c->pfd, 0, c->proxyctx);
1264 e0f6dc64 2022-01-27 op c->pfd = -1;
1265 72b033ef 2021-12-29 op }
1266 e0f6dc64 2022-01-27 op
1267 e0f6dc64 2022-01-27 op if (c->proxybev != NULL)
1268 e0f6dc64 2022-01-27 op bufferevent_free(c->proxybev);
1269 72b033ef 2021-12-29 op
1270 efe7d180 2021-10-02 op client_close_ev(c->fd, 0, c);
1271 efe7d180 2021-10-02 op }
1272 efe7d180 2021-10-02 op
1273 fe406389 2021-02-02 op static void
1274 abc007d2 2021-02-08 op do_accept(int sock, short et, void *d)
1275 d3a08f4d 2021-01-17 op {
1276 abc007d2 2021-02-08 op struct client *c;
1277 d3a08f4d 2021-01-17 op struct sockaddr_storage addr;
1278 abc007d2 2021-02-08 op struct sockaddr *saddr;
1279 d3a08f4d 2021-01-17 op socklen_t len;
1280 207b3e80 2021-10-07 op int fd;
1281 abc007d2 2021-02-08 op
1282 abc007d2 2021-02-08 op saddr = (struct sockaddr*)&addr;
1283 d3a08f4d 2021-01-17 op len = sizeof(addr);
1284 3cb3dd4d 2021-02-12 op if ((fd = accept(sock, saddr, &len)) == -1) {
1285 c62a411f 2021-10-13 op if (errno == EWOULDBLOCK || errno == EAGAIN ||
1286 c62a411f 2021-10-13 op errno == ECONNABORTED)
1287 d3a08f4d 2021-01-17 op return;
1288 d3a08f4d 2021-01-17 op fatal("accept: %s", strerror(errno));
1289 d3a08f4d 2021-01-17 op }
1290 d3a08f4d 2021-01-17 op
1291 3cb3dd4d 2021-02-12 op mark_nonblock(fd);
1292 3cb3dd4d 2021-02-12 op
1293 207b3e80 2021-10-07 op c = xcalloc(1, sizeof(*c));
1294 207b3e80 2021-10-07 op c->id = ++server_client_id;
1295 207b3e80 2021-10-07 op c->fd = fd;
1296 207b3e80 2021-10-07 op c->pfd = -1;
1297 207b3e80 2021-10-07 op c->addr = addr;
1298 d3a08f4d 2021-01-17 op
1299 207b3e80 2021-10-07 op if (tls_accept_socket(ctx, &c->ctx, fd) == -1) {
1300 207b3e80 2021-10-07 op log_warn(c, "failed to accept socket: %s", tls_error(c->ctx));
1301 207b3e80 2021-10-07 op close(c->fd);
1302 207b3e80 2021-10-07 op free(c);
1303 207b3e80 2021-10-07 op return;
1304 d3a08f4d 2021-01-17 op }
1305 d3a08f4d 2021-01-17 op
1306 207b3e80 2021-10-07 op SPLAY_INSERT(client_tree_id, &clients, c);
1307 207b3e80 2021-10-07 op event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1308 207b3e80 2021-10-07 op connected_clients++;
1309 d3a08f4d 2021-01-17 op }
1310 d3a08f4d 2021-01-17 op
1311 8ad1c570 2021-05-09 op struct client *
1312 3fdc457c 2022-03-26 op client_by_id(int id)
1313 8ad1c570 2021-05-09 op {
1314 207b3e80 2021-10-07 op struct client find;
1315 207b3e80 2021-10-07 op
1316 207b3e80 2021-10-07 op find.id = id;
1317 207b3e80 2021-10-07 op return SPLAY_FIND(client_tree_id, &clients, &find);
1318 8ad1c570 2021-05-09 op }
1319 8ad1c570 2021-05-09 op
1320 abc007d2 2021-02-08 op static void
1321 bc99d868 2021-03-19 op handle_imsg_quit(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1322 bc99d868 2021-03-19 op {
1323 a8a1f439 2021-07-07 op /*
1324 a8a1f439 2021-07-07 op * don't call event_loopbreak since we want to finish to
1325 a8a1f439 2021-07-07 op * handle the ongoing connections.
1326 a8a1f439 2021-07-07 op */
1327 bc99d868 2021-03-19 op
1328 090b8a89 2021-07-06 op shutting_down = 1;
1329 090b8a89 2021-07-06 op
1330 a6e689d7 2021-02-12 op event_del(&e4);
1331 a6e689d7 2021-02-12 op if (has_ipv6)
1332 a6e689d7 2021-02-12 op event_del(&e6);
1333 a6e689d7 2021-02-12 op if (has_siginfo)
1334 a6e689d7 2021-02-12 op signal_del(&siginfo);
1335 bc99d868 2021-03-19 op event_del(&imsgev);
1336 a6e689d7 2021-02-12 op signal_del(&sigusr2);
1337 abc007d2 2021-02-08 op }
1338 d3a08f4d 2021-01-17 op
1339 abc007d2 2021-02-08 op static void
1340 bc99d868 2021-03-19 op handle_dispatch_imsg(int fd, short ev, void *d)
1341 bc99d868 2021-03-19 op {
1342 bc99d868 2021-03-19 op struct imsgbuf *ibuf = d;
1343 bc99d868 2021-03-19 op dispatch_imsg(ibuf, handlers, sizeof(handlers));
1344 bc99d868 2021-03-19 op }
1345 bc99d868 2021-03-19 op
1346 bc99d868 2021-03-19 op static void
1347 abc007d2 2021-02-08 op handle_siginfo(int fd, short ev, void *d)
1348 abc007d2 2021-02-08 op {
1349 abc007d2 2021-02-08 op log_info(NULL, "%d connected clients", connected_clients);
1350 abc007d2 2021-02-08 op }
1351 d3a08f4d 2021-01-17 op
1352 abc007d2 2021-02-08 op void
1353 bc99d868 2021-03-19 op loop(struct tls *ctx_, int sock4, int sock6, struct imsgbuf *ibuf)
1354 abc007d2 2021-02-08 op {
1355 bc99d868 2021-03-19 op ctx = ctx_;
1356 bc99d868 2021-03-19 op
1357 207b3e80 2021-10-07 op SPLAY_INIT(&clients);
1358 207b3e80 2021-10-07 op
1359 abc007d2 2021-02-08 op event_init();
1360 1e3ef7ab 2021-02-03 op
1361 bc99d868 2021-03-19 op event_set(&e4, sock4, EV_READ | EV_PERSIST, &do_accept, NULL);
1362 a6e689d7 2021-02-12 op event_add(&e4, NULL);
1363 ca21e100 2021-02-04 op
1364 abc007d2 2021-02-08 op if (sock6 != -1) {
1365 a6e689d7 2021-02-12 op has_ipv6 = 1;
1366 bc99d868 2021-03-19 op event_set(&e6, sock6, EV_READ | EV_PERSIST, &do_accept, NULL);
1367 a6e689d7 2021-02-12 op event_add(&e6, NULL);
1368 d3a08f4d 2021-01-17 op }
1369 abc007d2 2021-02-08 op
1370 0126d91d 2022-09-07 op if (ibuf) {
1371 0126d91d 2022-09-07 op event_set(&imsgev, ibuf->fd, EV_READ | EV_PERSIST,
1372 0126d91d 2022-09-07 op handle_dispatch_imsg, ibuf);
1373 0126d91d 2022-09-07 op event_add(&imsgev, NULL);
1374 0126d91d 2022-09-07 op }
1375 abc007d2 2021-02-08 op
1376 abc007d2 2021-02-08 op #ifdef SIGINFO
1377 a6e689d7 2021-02-12 op has_siginfo = 1;
1378 a6e689d7 2021-02-12 op signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1379 a6e689d7 2021-02-12 op signal_add(&siginfo, NULL);
1380 abc007d2 2021-02-08 op #endif
1381 5e3285d5 2021-02-12 op signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1382 a6e689d7 2021-02-12 op signal_add(&sigusr2, NULL);
1383 abc007d2 2021-02-08 op
1384 76000995 2022-09-06 op sandbox_server_process(conf.can_open_sockets);
1385 abc007d2 2021-02-08 op event_dispatch();
1386 df58efff 2021-02-08 op _exit(0);
1387 d3a08f4d 2021-01-17 op }
1388 207b3e80 2021-10-07 op
1389 207b3e80 2021-10-07 op int
1390 207b3e80 2021-10-07 op client_tree_cmp(struct client *a, struct client *b)
1391 207b3e80 2021-10-07 op {
1392 207b3e80 2021-10-07 op if (a->id == b->id)
1393 207b3e80 2021-10-07 op return 0;
1394 207b3e80 2021-10-07 op else if (a->id < b->id)
1395 207b3e80 2021-10-07 op return -1;
1396 207b3e80 2021-10-07 op else
1397 207b3e80 2021-10-07 op return +1;
1398 207b3e80 2021-10-07 op }
1399 207b3e80 2021-10-07 op
1400 207b3e80 2021-10-07 op SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)