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1 d3a08f4d 2021-01-17 op /*
2 d3a08f4d 2021-01-17 op * Copyright (c) 2021 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 d3a08f4d 2021-01-17 op
21 d3a08f4d 2021-01-17 op #include <assert.h>
22 efe7d180 2021-10-02 op #include <ctype.h>
23 d3a08f4d 2021-01-17 op #include <errno.h>
24 abc007d2 2021-02-08 op #include <event.h>
25 d3a08f4d 2021-01-17 op #include <fcntl.h>
26 b4d409cf 2021-01-21 op #include <fnmatch.h>
27 2fafa2d2 2021-02-01 op #include <limits.h>
28 d3a08f4d 2021-01-17 op #include <string.h>
29 090b8a89 2021-07-06 op
30 efe7d180 2021-10-02 op #define MIN(a, b) ((a) < (b) ? (a) : (b))
31 efe7d180 2021-10-02 op
32 090b8a89 2021-07-06 op int shutting_down;
33 d3a08f4d 2021-01-17 op
34 bc99d868 2021-03-19 op static struct tls *ctx;
35 abc007d2 2021-02-08 op
36 bc99d868 2021-03-19 op static struct event e4, e6, imsgev, siginfo, sigusr2;
37 6b191ed5 2021-02-23 op static int has_ipv6, has_siginfo;
38 abc007d2 2021-02-08 op
39 d3a08f4d 2021-01-17 op int connected_clients;
40 d3a08f4d 2021-01-17 op
41 49b73ba1 2021-02-10 op static inline int matches(const char*, const char*);
42 49b73ba1 2021-02-10 op
43 fe406389 2021-02-02 op static int check_path(struct client*, const char*, int*);
44 abc007d2 2021-02-08 op static void open_file(struct client*);
45 abc007d2 2021-02-08 op static void check_for_cgi(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 b8e64ccd 2021-03-31 op static size_t host_nth(struct vhost*);
55 abc007d2 2021-02-08 op static void start_cgi(const char*, const char*, struct client*);
56 abc007d2 2021-02-08 op static void open_dir(struct client*);
57 abc007d2 2021-02-08 op static void redirect_canonical_dir(struct client*);
58 efe7d180 2021-10-02 op
59 efe7d180 2021-10-02 op static void client_tls_readcb(int, short, void *);
60 efe7d180 2021-10-02 op static void client_tls_writecb(int, short, void *);
61 efe7d180 2021-10-02 op
62 efe7d180 2021-10-02 op static void client_read(struct bufferevent *, void *);
63 efe7d180 2021-10-02 op void client_write(struct bufferevent *, void *);
64 efe7d180 2021-10-02 op static void client_error(struct bufferevent *, short, void *);
65 efe7d180 2021-10-02 op
66 efe7d180 2021-10-02 op static void client_close_ev(int, short, void *);
67 efe7d180 2021-10-02 op
68 efe7d180 2021-10-02 op static void cgi_read(struct bufferevent *, void *);
69 efe7d180 2021-10-02 op static void cgi_write(struct bufferevent *, void *);
70 efe7d180 2021-10-02 op static void cgi_error(struct bufferevent *, short, void *);
71 efe7d180 2021-10-02 op
72 abc007d2 2021-02-08 op static void do_accept(int, short, void*);
73 efe7d180 2021-10-02 op static struct client *client_by_id(int);
74 efe7d180 2021-10-02 op
75 bc99d868 2021-03-19 op static void handle_imsg_cgi_res(struct imsgbuf*, struct imsg*, size_t);
76 8ad1c570 2021-05-09 op static void handle_imsg_fcgi_fd(struct imsgbuf*, struct imsg*, size_t);
77 72b033ef 2021-12-29 op static void handle_imsg_conn_fd(struct imsgbuf*, struct imsg*, size_t);
78 bc99d868 2021-03-19 op static void handle_imsg_quit(struct imsgbuf*, struct imsg*, size_t);
79 efe7d180 2021-10-02 op static void handle_dispatch_imsg(int, short, void *);
80 bc99d868 2021-03-19 op static void handle_siginfo(int, short, void*);
81 bc99d868 2021-03-19 op
82 bc99d868 2021-03-19 op static imsg_handlerfn *handlers[] = {
83 bc99d868 2021-03-19 op [IMSG_QUIT] = handle_imsg_quit,
84 bc99d868 2021-03-19 op [IMSG_CGI_RES] = handle_imsg_cgi_res,
85 8ad1c570 2021-05-09 op [IMSG_FCGI_FD] = handle_imsg_fcgi_fd,
86 72b033ef 2021-12-29 op [IMSG_CONN_FD] = handle_imsg_conn_fd,
87 bc99d868 2021-03-19 op };
88 207b3e80 2021-10-07 op
89 207b3e80 2021-10-07 op static uint32_t server_client_id;
90 207b3e80 2021-10-07 op
91 207b3e80 2021-10-07 op struct client_tree_id clients;
92 fe406389 2021-02-02 op
93 49b73ba1 2021-02-10 op static inline int
94 49b73ba1 2021-02-10 op matches(const char *pattern, const char *path)
95 49b73ba1 2021-02-10 op {
96 49b73ba1 2021-02-10 op if (*path == '/')
97 49b73ba1 2021-02-10 op path++;
98 49b73ba1 2021-02-10 op return !fnmatch(pattern, path, 0);
99 abc007d2 2021-02-08 op }
100 abc007d2 2021-02-08 op
101 c8b74339 2021-01-24 op const char *
102 c8b74339 2021-01-24 op vhost_lang(struct vhost *v, const char *path)
103 c8b74339 2021-01-24 op {
104 c8b74339 2021-01-24 op struct location *loc;
105 c8b74339 2021-01-24 op
106 caad0308 2021-01-27 op if (v == NULL || path == NULL)
107 6016a593 2021-01-30 op return NULL;
108 8443bff7 2021-01-25 op
109 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
110 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
111 cd761624 2021-02-06 op if (loc->lang != NULL) {
112 49b73ba1 2021-02-10 op if (matches(loc->match, path))
113 6016a593 2021-01-30 op return loc->lang;
114 c8b74339 2021-01-24 op }
115 c8b74339 2021-01-24 op }
116 c8b74339 2021-01-24 op
117 b8e64ccd 2021-03-31 op return TAILQ_FIRST(&v->locations)->lang;
118 c8b74339 2021-01-24 op }
119 c8b74339 2021-01-24 op
120 c8b74339 2021-01-24 op const char *
121 c8b74339 2021-01-24 op vhost_default_mime(struct vhost *v, const char *path)
122 c8b74339 2021-01-24 op {
123 c8b74339 2021-01-24 op struct location *loc;
124 c8b74339 2021-01-24 op const char *default_mime = "application/octet-stream";
125 caad0308 2021-01-27 op
126 caad0308 2021-01-27 op if (v == NULL || path == NULL)
127 caad0308 2021-01-27 op return default_mime;
128 c8b74339 2021-01-24 op
129 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
130 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
131 cd761624 2021-02-06 op if (loc->default_mime != NULL) {
132 49b73ba1 2021-02-10 op if (matches(loc->match, path))
133 6016a593 2021-01-30 op return loc->default_mime;
134 c8b74339 2021-01-24 op }
135 c8b74339 2021-01-24 op }
136 c8b74339 2021-01-24 op
137 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
138 b8e64ccd 2021-03-31 op if (loc->default_mime != NULL)
139 b8e64ccd 2021-03-31 op return loc->default_mime;
140 c8b74339 2021-01-24 op return default_mime;
141 c8b74339 2021-01-24 op }
142 c8b74339 2021-01-24 op
143 c8b74339 2021-01-24 op const char *
144 c8b74339 2021-01-24 op vhost_index(struct vhost *v, const char *path)
145 c8b74339 2021-01-24 op {
146 c8b74339 2021-01-24 op struct location *loc;
147 c8b74339 2021-01-24 op const char *index = "index.gmi";
148 c8b74339 2021-01-24 op
149 caad0308 2021-01-27 op if (v == NULL || path == NULL)
150 caad0308 2021-01-27 op return index;
151 caad0308 2021-01-27 op
152 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
153 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
154 cd761624 2021-02-06 op if (loc->index != NULL) {
155 49b73ba1 2021-02-10 op if (matches(loc->match, path))
156 6016a593 2021-01-30 op return loc->index;
157 c8b74339 2021-01-24 op }
158 c8b74339 2021-01-24 op }
159 c8b74339 2021-01-24 op
160 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
161 b8e64ccd 2021-03-31 op if (loc->index != NULL)
162 b8e64ccd 2021-03-31 op return loc->index;
163 c8b74339 2021-01-24 op return index;
164 c8b74339 2021-01-24 op }
165 c8b74339 2021-01-24 op
166 d3a08f4d 2021-01-17 op int
167 252908e6 2021-01-24 op vhost_auto_index(struct vhost *v, const char *path)
168 252908e6 2021-01-24 op {
169 252908e6 2021-01-24 op struct location *loc;
170 252908e6 2021-01-24 op
171 6016a593 2021-01-30 op if (v == NULL || path == NULL)
172 6016a593 2021-01-30 op return 0;
173 6016a593 2021-01-30 op
174 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
175 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
176 cd761624 2021-02-06 op if (loc->auto_index != 0) {
177 49b73ba1 2021-02-10 op if (matches(loc->match, path))
178 6016a593 2021-01-30 op return loc->auto_index == 1;
179 252908e6 2021-01-24 op }
180 252908e6 2021-01-24 op }
181 252908e6 2021-01-24 op
182 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
183 b8e64ccd 2021-03-31 op return loc->auto_index == 1;
184 6abda252 2021-02-06 op }
185 6abda252 2021-02-06 op
186 6abda252 2021-02-06 op int
187 6abda252 2021-02-06 op vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
188 6abda252 2021-02-06 op {
189 6abda252 2021-02-06 op struct location *loc;
190 6abda252 2021-02-06 op
191 6abda252 2021-02-06 op if (v == NULL || path == NULL)
192 6abda252 2021-02-06 op return 0;
193 6abda252 2021-02-06 op
194 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
195 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
196 cd761624 2021-02-06 op if (loc->block_code != 0) {
197 49b73ba1 2021-02-10 op if (matches(loc->match, path)) {
198 6abda252 2021-02-06 op *code = loc->block_code;
199 6abda252 2021-02-06 op *fmt = loc->block_fmt;
200 6abda252 2021-02-06 op return 1;
201 6abda252 2021-02-06 op }
202 6abda252 2021-02-06 op }
203 6abda252 2021-02-06 op }
204 6abda252 2021-02-06 op
205 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
206 b8e64ccd 2021-03-31 op *code = loc->block_code;
207 b8e64ccd 2021-03-31 op *fmt = loc->block_fmt;
208 b8e64ccd 2021-03-31 op return loc->block_code != 0;
209 72b033ef 2021-12-29 op }
210 72b033ef 2021-12-29 op
211 6abda252 2021-02-06 op int
212 8ad1c570 2021-05-09 op vhost_fastcgi(struct vhost *v, const char *path)
213 8ad1c570 2021-05-09 op {
214 8ad1c570 2021-05-09 op struct location *loc;
215 8ad1c570 2021-05-09 op
216 8ad1c570 2021-05-09 op if (v == NULL || path == NULL)
217 8ad1c570 2021-05-09 op return -1;
218 8ad1c570 2021-05-09 op
219 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
220 8ad1c570 2021-05-09 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
221 8ad1c570 2021-05-09 op if (loc->fcgi != -1)
222 8ad1c570 2021-05-09 op if (matches(loc->match, path))
223 8ad1c570 2021-05-09 op return loc->fcgi;
224 8ad1c570 2021-05-09 op }
225 8ad1c570 2021-05-09 op
226 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
227 8ad1c570 2021-05-09 op return loc->fcgi;
228 8ad1c570 2021-05-09 op }
229 8ad1c570 2021-05-09 op
230 8ad1c570 2021-05-09 op int
231 1feaf2a6 2021-05-15 op vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
232 fdea6aa0 2021-04-30 op {
233 fdea6aa0 2021-04-30 op struct location *loc;
234 1feaf2a6 2021-05-15 op size_t l = 0;
235 fdea6aa0 2021-04-30 op
236 fdea6aa0 2021-04-30 op if (v == NULL || path == NULL)
237 fdea6aa0 2021-04-30 op return -1;
238 fdea6aa0 2021-04-30 op
239 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
240 fdea6aa0 2021-04-30 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
241 1feaf2a6 2021-05-15 op l++;
242 fdea6aa0 2021-04-30 op if (loc->dirfd != -1)
243 1feaf2a6 2021-05-15 op if (matches(loc->match, path)) {
244 1feaf2a6 2021-05-15 op *retloc = l;
245 fdea6aa0 2021-04-30 op return loc->dirfd;
246 1feaf2a6 2021-05-15 op }
247 fdea6aa0 2021-04-30 op }
248 fdea6aa0 2021-04-30 op
249 1feaf2a6 2021-05-15 op *retloc = 0;
250 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
251 fdea6aa0 2021-04-30 op return loc->dirfd;
252 fdea6aa0 2021-04-30 op }
253 fdea6aa0 2021-04-30 op
254 fdea6aa0 2021-04-30 op int
255 6abda252 2021-02-06 op vhost_strip(struct vhost *v, const char *path)
256 6abda252 2021-02-06 op {
257 6abda252 2021-02-06 op struct location *loc;
258 6abda252 2021-02-06 op
259 6abda252 2021-02-06 op if (v == NULL || path == NULL)
260 6abda252 2021-02-06 op return 0;
261 6abda252 2021-02-06 op
262 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
263 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
264 cd761624 2021-02-06 op if (loc->strip != 0) {
265 49b73ba1 2021-02-10 op if (matches(loc->match, path))
266 6abda252 2021-02-06 op return loc->strip;
267 6abda252 2021-02-06 op }
268 6abda252 2021-02-06 op }
269 6abda252 2021-02-06 op
270 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
271 b8e64ccd 2021-03-31 op return loc->strip;
272 252908e6 2021-01-24 op }
273 252908e6 2021-01-24 op
274 02be96c6 2021-02-09 op X509_STORE *
275 02be96c6 2021-02-09 op vhost_require_ca(struct vhost *v, const char *path)
276 02be96c6 2021-02-09 op {
277 02be96c6 2021-02-09 op struct location *loc;
278 02be96c6 2021-02-09 op
279 02be96c6 2021-02-09 op if (v == NULL || path == NULL)
280 02be96c6 2021-02-09 op return NULL;
281 02be96c6 2021-02-09 op
282 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
283 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
284 02be96c6 2021-02-09 op if (loc->reqca != NULL) {
285 49b73ba1 2021-02-10 op if (matches(loc->match, path))
286 02be96c6 2021-02-09 op return loc->reqca;
287 02be96c6 2021-02-09 op }
288 02be96c6 2021-02-09 op }
289 02be96c6 2021-02-09 op
290 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
291 b8e64ccd 2021-03-31 op return loc->reqca;
292 793835cb 2021-02-23 op }
293 793835cb 2021-02-23 op
294 793835cb 2021-02-23 op int
295 793835cb 2021-02-23 op vhost_disable_log(struct vhost *v, const char *path)
296 793835cb 2021-02-23 op {
297 793835cb 2021-02-23 op struct location *loc;
298 793835cb 2021-02-23 op
299 793835cb 2021-02-23 op if (v == NULL || path == NULL)
300 793835cb 2021-02-23 op return 0;
301 793835cb 2021-02-23 op
302 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
303 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
304 793835cb 2021-02-23 op if (loc->disable_log && matches(loc->match, path))
305 793835cb 2021-02-23 op return 1;
306 793835cb 2021-02-23 op }
307 793835cb 2021-02-23 op
308 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
309 b8e64ccd 2021-03-31 op return loc->disable_log;
310 02be96c6 2021-02-09 op }
311 02be96c6 2021-02-09 op
312 fe406389 2021-02-02 op static int
313 d3a08f4d 2021-01-17 op check_path(struct client *c, const char *path, int *fd)
314 d3a08f4d 2021-01-17 op {
315 d3a08f4d 2021-01-17 op struct stat sb;
316 d1ca3911 2021-01-21 op const char *p;
317 efb48052 2021-07-27 op int dirfd, strip;
318 d3a08f4d 2021-01-17 op
319 d3a08f4d 2021-01-17 op assert(path != NULL);
320 d1ca3911 2021-01-21 op
321 fdea6aa0 2021-04-30 op /*
322 fdea6aa0 2021-04-30 op * in send_dir we add an initial / (to be redirect-friendly),
323 fdea6aa0 2021-04-30 op * but here we want to skip it
324 fdea6aa0 2021-04-30 op */
325 fdea6aa0 2021-04-30 op if (*path == '/')
326 fdea6aa0 2021-04-30 op path++;
327 fdea6aa0 2021-04-30 op
328 fdea6aa0 2021-04-30 op strip = vhost_strip(c->host, path);
329 fdea6aa0 2021-04-30 op p = strip_path(path, strip);
330 fdea6aa0 2021-04-30 op
331 fdea6aa0 2021-04-30 op if (*p == '/')
332 fdea6aa0 2021-04-30 op p = p+1;
333 fdea6aa0 2021-04-30 op if (*p == '\0')
334 d1ca3911 2021-01-21 op p = ".";
335 d1ca3911 2021-01-21 op
336 1feaf2a6 2021-05-15 op dirfd = vhost_dirfd(c->host, path, &c->loc);
337 fdea6aa0 2021-04-30 op log_debug(c, "check_path: strip=%d path=%s original=%s",
338 fdea6aa0 2021-04-30 op strip, p, path);
339 efb48052 2021-07-27 op if (*fd == -1 && (*fd = openat(dirfd, p, O_RDONLY)) == -1)
340 d3a08f4d 2021-01-17 op return FILE_MISSING;
341 d3a08f4d 2021-01-17 op
342 d3a08f4d 2021-01-17 op if (fstat(*fd, &sb) == -1) {
343 3abf91b0 2021-02-07 op log_notice(c, "failed stat for %s: %s", path, strerror(errno));
344 d3a08f4d 2021-01-17 op return FILE_MISSING;
345 d3a08f4d 2021-01-17 op }
346 d3a08f4d 2021-01-17 op
347 d3a08f4d 2021-01-17 op if (S_ISDIR(sb.st_mode))
348 d3a08f4d 2021-01-17 op return FILE_DIRECTORY;
349 d3a08f4d 2021-01-17 op
350 d3a08f4d 2021-01-17 op if (sb.st_mode & S_IXUSR)
351 d3a08f4d 2021-01-17 op return FILE_EXECUTABLE;
352 d3a08f4d 2021-01-17 op
353 d3a08f4d 2021-01-17 op return FILE_EXISTS;
354 d3a08f4d 2021-01-17 op }
355 d3a08f4d 2021-01-17 op
356 fe406389 2021-02-02 op static void
357 abc007d2 2021-02-08 op open_file(struct client *c)
358 d3a08f4d 2021-01-17 op {
359 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
360 d3a08f4d 2021-01-17 op case FILE_EXECUTABLE:
361 eecad7a3 2021-02-12 op if (c->host->cgi != NULL && matches(c->host->cgi, c->iri.path)) {
362 abc007d2 2021-02-08 op start_cgi(c->iri.path, "", c);
363 07b0a142 2021-01-24 op return;
364 07b0a142 2021-01-24 op }
365 d3a08f4d 2021-01-17 op
366 d3a08f4d 2021-01-17 op /* fallthrough */
367 d3a08f4d 2021-01-17 op
368 d3a08f4d 2021-01-17 op case FILE_EXISTS:
369 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
370 27b2fa9a 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
371 07b0a142 2021-01-24 op return;
372 d3a08f4d 2021-01-17 op
373 d3a08f4d 2021-01-17 op case FILE_DIRECTORY:
374 abc007d2 2021-02-08 op open_dir(c);
375 07b0a142 2021-01-24 op return;
376 d3a08f4d 2021-01-17 op
377 d3a08f4d 2021-01-17 op case FILE_MISSING:
378 eecad7a3 2021-02-12 op if (c->host->cgi != NULL && matches(c->host->cgi, c->iri.path)) {
379 abc007d2 2021-02-08 op check_for_cgi(c);
380 07b0a142 2021-01-24 op return;
381 07b0a142 2021-01-24 op }
382 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
383 07b0a142 2021-01-24 op return;
384 d3a08f4d 2021-01-17 op
385 d3a08f4d 2021-01-17 op default:
386 d3a08f4d 2021-01-17 op /* unreachable */
387 d3a08f4d 2021-01-17 op abort();
388 252908e6 2021-01-24 op }
389 252908e6 2021-01-24 op }
390 252908e6 2021-01-24 op
391 d3a08f4d 2021-01-17 op /*
392 d3a08f4d 2021-01-17 op * the inverse of this algorithm, i.e. starting from the start of the
393 d3a08f4d 2021-01-17 op * path + strlen(cgi), and checking if each component, should be
394 d3a08f4d 2021-01-17 op * faster. But it's tedious to write. This does the opposite: starts
395 d3a08f4d 2021-01-17 op * from the end and strip one component at a time, until either an
396 d3a08f4d 2021-01-17 op * executable is found or we emptied the path.
397 d3a08f4d 2021-01-17 op */
398 fe406389 2021-02-02 op static void
399 abc007d2 2021-02-08 op check_for_cgi(struct client *c)
400 d3a08f4d 2021-01-17 op {
401 2fafa2d2 2021-02-01 op char path[PATH_MAX];
402 d3a08f4d 2021-01-17 op char *end;
403 2fafa2d2 2021-02-01 op
404 2fafa2d2 2021-02-01 op strlcpy(path, c->iri.path, sizeof(path));
405 d3a08f4d 2021-01-17 op end = strchr(path, '\0');
406 d3a08f4d 2021-01-17 op
407 d3a08f4d 2021-01-17 op while (end > path) {
408 571d20fb 2021-05-15 op /*
409 571d20fb 2021-05-15 op * go up one level. UNIX paths are simple and POSIX
410 571d20fb 2021-05-15 op * dirname, with its ambiguities on if the given
411 571d20fb 2021-05-15 op * pointer is changed or not, gives me headaches.
412 571d20fb 2021-05-15 op */
413 3571854e 2021-09-24 op while (*end != '/' && end > path)
414 d3a08f4d 2021-01-17 op end--;
415 3571854e 2021-09-24 op
416 3571854e 2021-09-24 op if (end == path)
417 3571854e 2021-09-24 op break;
418 3571854e 2021-09-24 op
419 d3a08f4d 2021-01-17 op *end = '\0';
420 d3a08f4d 2021-01-17 op
421 abc007d2 2021-02-08 op switch (check_path(c, path, &c->pfd)) {
422 d3a08f4d 2021-01-17 op case FILE_EXECUTABLE:
423 abc007d2 2021-02-08 op start_cgi(path, end+1, c);
424 07b0a142 2021-01-24 op return;
425 d3a08f4d 2021-01-17 op case FILE_MISSING:
426 d3a08f4d 2021-01-17 op break;
427 d3a08f4d 2021-01-17 op default:
428 d3a08f4d 2021-01-17 op goto err;
429 d3a08f4d 2021-01-17 op }
430 d3a08f4d 2021-01-17 op
431 d3a08f4d 2021-01-17 op *end = '/';
432 d3a08f4d 2021-01-17 op end--;
433 d3a08f4d 2021-01-17 op }
434 d3a08f4d 2021-01-17 op
435 d3a08f4d 2021-01-17 op err:
436 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
437 07b0a142 2021-01-24 op return;
438 d3a08f4d 2021-01-17 op }
439 d3a08f4d 2021-01-17 op
440 9b8f5ed2 2021-02-03 op void
441 9b8f5ed2 2021-02-03 op mark_nonblock(int fd)
442 9b8f5ed2 2021-02-03 op {
443 9b8f5ed2 2021-02-03 op int flags;
444 9b8f5ed2 2021-02-03 op
445 9b8f5ed2 2021-02-03 op if ((flags = fcntl(fd, F_GETFL)) == -1)
446 9b8f5ed2 2021-02-03 op fatal("fcntl(F_GETFL): %s", strerror(errno));
447 9b8f5ed2 2021-02-03 op if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
448 9b8f5ed2 2021-02-03 op fatal("fcntl(F_SETFL): %s", strerror(errno));
449 9b8f5ed2 2021-02-03 op }
450 9b8f5ed2 2021-02-03 op
451 fe406389 2021-02-02 op static void
452 abc007d2 2021-02-08 op handle_handshake(int fd, short ev, void *d)
453 d3a08f4d 2021-01-17 op {
454 abc007d2 2021-02-08 op struct client *c = d;
455 d3a08f4d 2021-01-17 op struct vhost *h;
456 cc8c2901 2021-04-29 op struct alist *a;
457 d3a08f4d 2021-01-17 op const char *servname;
458 a8d4a897 2021-01-29 op const char *parse_err = "unknown error";
459 d3a08f4d 2021-01-17 op
460 d3a08f4d 2021-01-17 op switch (tls_handshake(c->ctx)) {
461 d3a08f4d 2021-01-17 op case 0: /* success */
462 d3a08f4d 2021-01-17 op case -1: /* already handshaked */
463 d3a08f4d 2021-01-17 op break;
464 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
465 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, handle_handshake, c, NULL);
466 d3a08f4d 2021-01-17 op return;
467 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
468 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
469 d3a08f4d 2021-01-17 op return;
470 d3a08f4d 2021-01-17 op default:
471 d3a08f4d 2021-01-17 op /* unreachable */
472 d3a08f4d 2021-01-17 op abort();
473 d3a08f4d 2021-01-17 op }
474 80444938 2021-10-15 op
475 80444938 2021-10-15 op c->bev = bufferevent_new(fd, client_read, client_write,
476 80444938 2021-10-15 op client_error, c);
477 80444938 2021-10-15 op if (c->bev == NULL)
478 80444938 2021-10-15 op fatal("%s: failed to allocate client buffer: %s",
479 80444938 2021-10-15 op __func__, strerror(errno));
480 d3a08f4d 2021-01-17 op
481 80444938 2021-10-15 op event_set(&c->bev->ev_read, c->fd, EV_READ,
482 80444938 2021-10-15 op client_tls_readcb, c->bev);
483 80444938 2021-10-15 op event_set(&c->bev->ev_write, c->fd, EV_WRITE,
484 80444938 2021-10-15 op client_tls_writecb, c->bev);
485 80444938 2021-10-15 op
486 80444938 2021-10-15 op #if HAVE_LIBEVENT2
487 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->input, 0);
488 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->output, 1);
489 80444938 2021-10-15 op #endif
490 80444938 2021-10-15 op
491 79288c8b 2021-09-24 op if ((servname = tls_conn_servername(c->ctx)) == NULL) {
492 79288c8b 2021-09-24 op log_debug(c, "handshake: missing SNI");
493 79288c8b 2021-09-24 op goto err;
494 79288c8b 2021-09-24 op }
495 79288c8b 2021-09-24 op
496 a8d4a897 2021-01-29 op if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
497 3abf91b0 2021-02-07 op log_info(c, "puny_decode: %s", parse_err);
498 a8d4a897 2021-01-29 op goto err;
499 a8d4a897 2021-01-29 op }
500 d3a08f4d 2021-01-17 op
501 b8e64ccd 2021-03-31 op TAILQ_FOREACH(h, &hosts, vhosts) {
502 eecad7a3 2021-02-12 op if (matches(h->domain, c->domain))
503 cc8c2901 2021-04-29 op goto found;
504 cc8c2901 2021-04-29 op TAILQ_FOREACH(a, &h->aliases, aliases) {
505 cc8c2901 2021-04-29 op if (matches(a->alias, c->domain))
506 cc8c2901 2021-04-29 op goto found;
507 cc8c2901 2021-04-29 op }
508 d3a08f4d 2021-01-17 op }
509 d3a08f4d 2021-01-17 op
510 cc8c2901 2021-04-29 op found:
511 3abf91b0 2021-02-07 op log_debug(c, "handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
512 3abf91b0 2021-02-07 op servname != NULL ? servname : "(null)",
513 3abf91b0 2021-02-07 op c->domain,
514 b8e64ccd 2021-03-31 op h != NULL ? h->domain : "(null)");
515 22c6d633 2021-01-27 op
516 b8e64ccd 2021-03-31 op if (h != NULL) {
517 d3a08f4d 2021-01-17 op c->host = h;
518 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EV_READ);
519 d3a08f4d 2021-01-17 op return;
520 d3a08f4d 2021-01-17 op }
521 d3a08f4d 2021-01-17 op
522 a8d4a897 2021-01-29 op err:
523 abc007d2 2021-02-08 op start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
524 6abda252 2021-02-06 op }
525 6abda252 2021-02-06 op
526 91b9f2a8 2021-05-15 op static const char *
527 91b9f2a8 2021-05-15 op strip_path(const char *path, int strip)
528 6abda252 2021-02-06 op {
529 57ec3e77 2021-02-08 op char *t;
530 6abda252 2021-02-06 op
531 6abda252 2021-02-06 op while (strip > 0) {
532 6abda252 2021-02-06 op if ((t = strchr(path, '/')) == NULL) {
533 6abda252 2021-02-06 op path = strchr(path, '\0');
534 6abda252 2021-02-06 op break;
535 6abda252 2021-02-06 op }
536 6abda252 2021-02-06 op path = t;
537 6abda252 2021-02-06 op strip--;
538 6abda252 2021-02-06 op }
539 57ec3e77 2021-02-08 op
540 57ec3e77 2021-02-08 op return path;
541 57ec3e77 2021-02-08 op }
542 57ec3e77 2021-02-08 op
543 57ec3e77 2021-02-08 op static void
544 57ec3e77 2021-02-08 op fmt_sbuf(const char *fmt, struct client *c, const char *path)
545 57ec3e77 2021-02-08 op {
546 57ec3e77 2021-02-08 op size_t i;
547 4842c72d 2021-10-18 op char buf[32];
548 6abda252 2021-02-06 op
549 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
550 6abda252 2021-02-06 op for (i = 0; *fmt; ++fmt) {
551 6abda252 2021-02-06 op if (i == sizeof(buf)-1 || *fmt == '%') {
552 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
553 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
554 6abda252 2021-02-06 op i = 0;
555 6abda252 2021-02-06 op }
556 6abda252 2021-02-06 op
557 6abda252 2021-02-06 op if (*fmt != '%') {
558 6abda252 2021-02-06 op buf[i++] = *fmt;
559 6abda252 2021-02-06 op continue;
560 6abda252 2021-02-06 op }
561 6abda252 2021-02-06 op
562 6abda252 2021-02-06 op switch (*++fmt) {
563 6abda252 2021-02-06 op case '%':
564 6abda252 2021-02-06 op strlcat(c->sbuf, "%", sizeof(c->sbuf));
565 6abda252 2021-02-06 op break;
566 6abda252 2021-02-06 op case 'p':
567 737a6b50 2021-04-30 op if (*path != '/')
568 737a6b50 2021-04-30 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
569 6abda252 2021-02-06 op strlcat(c->sbuf, path, sizeof(c->sbuf));
570 6abda252 2021-02-06 op break;
571 6abda252 2021-02-06 op case 'q':
572 6abda252 2021-02-06 op strlcat(c->sbuf, c->iri.query, sizeof(c->sbuf));
573 6abda252 2021-02-06 op break;
574 6abda252 2021-02-06 op case 'P':
575 6abda252 2021-02-06 op snprintf(buf, sizeof(buf), "%d", conf.port);
576 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
577 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
578 6abda252 2021-02-06 op break;
579 6abda252 2021-02-06 op case 'N':
580 6abda252 2021-02-06 op strlcat(c->sbuf, c->domain, sizeof(c->sbuf));
581 6abda252 2021-02-06 op break;
582 6abda252 2021-02-06 op default:
583 6abda252 2021-02-06 op fatal("%s: unknown fmt specifier %c",
584 6abda252 2021-02-06 op __func__, *fmt);
585 6abda252 2021-02-06 op }
586 6abda252 2021-02-06 op }
587 6abda252 2021-02-06 op
588 6abda252 2021-02-06 op if (i != 0)
589 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
590 57ec3e77 2021-02-08 op }
591 6abda252 2021-02-06 op
592 57ec3e77 2021-02-08 op /* 1 if a matching `block return' (and apply it), 0 otherwise */
593 57ec3e77 2021-02-08 op static int
594 57ec3e77 2021-02-08 op apply_block_return(struct client *c)
595 57ec3e77 2021-02-08 op {
596 57ec3e77 2021-02-08 op const char *fmt, *path;
597 57ec3e77 2021-02-08 op int code;
598 57ec3e77 2021-02-08 op
599 57ec3e77 2021-02-08 op if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
600 57ec3e77 2021-02-08 op return 0;
601 57ec3e77 2021-02-08 op
602 57ec3e77 2021-02-08 op path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
603 57ec3e77 2021-02-08 op fmt_sbuf(fmt, c, path);
604 57ec3e77 2021-02-08 op
605 abc007d2 2021-02-08 op start_reply(c, code, c->sbuf);
606 72b033ef 2021-12-29 op return 1;
607 b7967bc1 2021-01-02 op }
608 b7967bc1 2021-01-02 op
609 b7967bc1 2021-01-02 op static struct proxy *
610 b7967bc1 2021-01-02 op matched_proxy(struct client *c)
611 b7967bc1 2021-01-02 op {
612 b7967bc1 2021-01-02 op struct proxy *p;
613 b7967bc1 2021-01-02 op const char *proto;
614 b7967bc1 2021-01-02 op const char *host;
615 b7967bc1 2021-01-02 op const char *port;
616 b7967bc1 2021-01-02 op
617 b7967bc1 2021-01-02 op TAILQ_FOREACH(p, &c->host->proxies, proxies) {
618 b7967bc1 2021-01-02 op if ((proto = p->match_proto) == NULL)
619 b7967bc1 2021-01-02 op proto = "gemini";
620 b7967bc1 2021-01-02 op if ((host = p->match_host) == NULL)
621 b7967bc1 2021-01-02 op host = "*";
622 b7967bc1 2021-01-02 op if ((port = p->match_port) == NULL)
623 b7967bc1 2021-01-02 op port = "*";
624 b7967bc1 2021-01-02 op
625 b7967bc1 2021-01-02 op if (matches(proto, c->iri.schema) &&
626 b7967bc1 2021-01-02 op matches(host, c->domain) &&
627 b7967bc1 2021-01-02 op matches(port, c->iri.port))
628 b7967bc1 2021-01-02 op return p;
629 b7967bc1 2021-01-02 op }
630 b7967bc1 2021-01-02 op
631 b7967bc1 2021-01-02 op return NULL;
632 ba94a608 2022-01-04 op }
633 ba94a608 2022-01-04 op
634 ba94a608 2022-01-04 op static int
635 ba94a608 2022-01-04 op check_matching_certificate(X509_STORE *store, struct client *c)
636 ba94a608 2022-01-04 op {
637 ba94a608 2022-01-04 op const uint8_t *cert;
638 ba94a608 2022-01-04 op size_t len;
639 ba94a608 2022-01-04 op
640 ba94a608 2022-01-04 op if (!tls_peer_cert_provided(c->ctx)) {
641 ba94a608 2022-01-04 op start_reply(c, CLIENT_CERT_REQ, "client certificate required");
642 ba94a608 2022-01-04 op return 1;
643 ba94a608 2022-01-04 op }
644 ba94a608 2022-01-04 op
645 ba94a608 2022-01-04 op cert = tls_peer_cert_chain_pem(c->ctx, &len);
646 ba94a608 2022-01-04 op if (!validate_against_ca(store, cert, len)) {
647 ba94a608 2022-01-04 op start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
648 ba94a608 2022-01-04 op return 1;
649 ba94a608 2022-01-04 op }
650 ba94a608 2022-01-04 op
651 ba94a608 2022-01-04 op return 0;
652 72b033ef 2021-12-29 op }
653 72b033ef 2021-12-29 op
654 72b033ef 2021-12-29 op /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
655 72b033ef 2021-12-29 op static int
656 72b033ef 2021-12-29 op apply_reverse_proxy(struct client *c)
657 72b033ef 2021-12-29 op {
658 7bdcc91e 2021-01-01 op struct proxy *p;
659 7bdcc91e 2021-01-01 op struct connreq r;
660 72b033ef 2021-12-29 op
661 b7967bc1 2021-01-02 op if ((p = matched_proxy(c)) == NULL)
662 72b033ef 2021-12-29 op return 0;
663 d49093c1 2021-01-01 op
664 b7967bc1 2021-01-02 op c->proxy = p;
665 b7967bc1 2021-01-02 op
666 ba94a608 2022-01-04 op if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
667 ba94a608 2022-01-04 op return 1;
668 ba94a608 2022-01-04 op
669 72b033ef 2021-12-29 op log_debug(c, "opening proxy connection for %s:%s",
670 7bdcc91e 2021-01-01 op p->host, p->port);
671 7bdcc91e 2021-01-01 op
672 7bdcc91e 2021-01-01 op strlcpy(r.host, p->host, sizeof(r.host));
673 7bdcc91e 2021-01-01 op strlcpy(r.port, p->port, sizeof(r.port));
674 72b033ef 2021-12-29 op
675 72b033ef 2021-12-29 op imsg_compose(&exibuf, IMSG_CONN_REQ, c->id, 0, -1, &r, sizeof(r));
676 72b033ef 2021-12-29 op imsg_flush(&exibuf);
677 72b033ef 2021-12-29 op
678 8ad1c570 2021-05-09 op return 1;
679 8ad1c570 2021-05-09 op }
680 8ad1c570 2021-05-09 op
681 8ad1c570 2021-05-09 op /* 1 if matching `fcgi' (and apply it), 0 otherwise */
682 8ad1c570 2021-05-09 op static int
683 8ad1c570 2021-05-09 op apply_fastcgi(struct client *c)
684 8ad1c570 2021-05-09 op {
685 8ad1c570 2021-05-09 op int id;
686 8ad1c570 2021-05-09 op struct fcgi *f;
687 8ad1c570 2021-05-09 op
688 8ad1c570 2021-05-09 op if ((id = vhost_fastcgi(c->host, c->iri.path)) == -1)
689 8ad1c570 2021-05-09 op return 0;
690 8ad1c570 2021-05-09 op
691 4cd25209 2021-10-07 op f = &fcgi[id];
692 4cd25209 2021-10-07 op
693 4cd25209 2021-10-07 op log_debug(c, "opening fastcgi connection for (%s,%s,%s)",
694 4cd25209 2021-10-07 op f->path, f->port, f->prog);
695 8ad1c570 2021-05-09 op
696 4cd25209 2021-10-07 op imsg_compose(&exibuf, IMSG_FCGI_REQ, c->id, 0, -1,
697 4cd25209 2021-10-07 op &id, sizeof(id));
698 4cd25209 2021-10-07 op imsg_flush(&exibuf);
699 6abda252 2021-02-06 op return 1;
700 d3a08f4d 2021-01-17 op }
701 d3a08f4d 2021-01-17 op
702 02be96c6 2021-02-09 op /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
703 02be96c6 2021-02-09 op static int
704 02be96c6 2021-02-09 op apply_require_ca(struct client *c)
705 02be96c6 2021-02-09 op {
706 02be96c6 2021-02-09 op X509_STORE *store;
707 02be96c6 2021-02-09 op
708 02be96c6 2021-02-09 op if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
709 02be96c6 2021-02-09 op return 0;
710 ba94a608 2022-01-04 op return check_matching_certificate(store, c);
711 02be96c6 2021-02-09 op }
712 02be96c6 2021-02-09 op
713 b8e64ccd 2021-03-31 op static size_t
714 b8e64ccd 2021-03-31 op host_nth(struct vhost *h)
715 b8e64ccd 2021-03-31 op {
716 b8e64ccd 2021-03-31 op struct vhost *v;
717 b8e64ccd 2021-03-31 op size_t i = 0;
718 b8e64ccd 2021-03-31 op
719 b8e64ccd 2021-03-31 op TAILQ_FOREACH(v, &hosts, vhosts) {
720 b8e64ccd 2021-03-31 op if (v == h)
721 b8e64ccd 2021-03-31 op return i;
722 b8e64ccd 2021-03-31 op i++;
723 b8e64ccd 2021-03-31 op }
724 b8e64ccd 2021-03-31 op
725 b8e64ccd 2021-03-31 op abort();
726 b8e64ccd 2021-03-31 op }
727 b8e64ccd 2021-03-31 op
728 fe406389 2021-02-02 op static void
729 abc007d2 2021-02-08 op start_cgi(const char *spath, const char *relpath, struct client *c)
730 d3a08f4d 2021-01-17 op {
731 d3a08f4d 2021-01-17 op char addr[NI_MAXHOST];
732 bc99d868 2021-03-19 op const char *t;
733 bc99d868 2021-03-19 op struct cgireq req;
734 d3a08f4d 2021-01-17 op int e;
735 d3a08f4d 2021-01-17 op
736 efe7d180 2021-10-02 op c->type = REQUEST_CGI;
737 efe7d180 2021-10-02 op
738 d3a08f4d 2021-01-17 op e = getnameinfo((struct sockaddr*)&c->addr, sizeof(c->addr),
739 d3a08f4d 2021-01-17 op addr, sizeof(addr),
740 d3a08f4d 2021-01-17 op NULL, 0,
741 d3a08f4d 2021-01-17 op NI_NUMERICHOST);
742 d3a08f4d 2021-01-17 op if (e != 0)
743 bc99d868 2021-03-19 op fatal("getnameinfo failed");
744 d3a08f4d 2021-01-17 op
745 bc99d868 2021-03-19 op memset(&req, 0, sizeof(req));
746 d3a08f4d 2021-01-17 op
747 bc99d868 2021-03-19 op memcpy(req.buf, c->req, sizeof(req.buf));
748 bc99d868 2021-03-19 op
749 bc99d868 2021-03-19 op req.iri_schema_off = c->iri.schema - c->req;
750 bc99d868 2021-03-19 op req.iri_host_off = c->iri.host - c->req;
751 bc99d868 2021-03-19 op req.iri_port_off = c->iri.port - c->req;
752 bc99d868 2021-03-19 op req.iri_path_off = c->iri.path - c->req;
753 bc99d868 2021-03-19 op req.iri_query_off = c->iri.query - c->req;
754 bc99d868 2021-03-19 op req.iri_fragment_off = c->iri.fragment - c->req;
755 35744950 2021-02-01 op
756 bc99d868 2021-03-19 op req.iri_portno = c->iri.port_no;
757 d3a08f4d 2021-01-17 op
758 bc99d868 2021-03-19 op strlcpy(req.spath, spath, sizeof(req.spath));
759 bc99d868 2021-03-19 op strlcpy(req.relpath, relpath, sizeof(req.relpath));
760 bc99d868 2021-03-19 op strlcpy(req.addr, addr, sizeof(req.addr));
761 bc99d868 2021-03-19 op
762 bc99d868 2021-03-19 op if ((t = tls_peer_cert_subject(c->ctx)) != NULL)
763 bc99d868 2021-03-19 op strlcpy(req.subject, t, sizeof(req.subject));
764 bc99d868 2021-03-19 op if ((t = tls_peer_cert_issuer(c->ctx)) != NULL)
765 bc99d868 2021-03-19 op strlcpy(req.issuer, t, sizeof(req.issuer));
766 bc99d868 2021-03-19 op if ((t = tls_peer_cert_hash(c->ctx)) != NULL)
767 bc99d868 2021-03-19 op strlcpy(req.hash, t, sizeof(req.hash));
768 89541eee 2021-04-13 op if ((t = tls_conn_version(c->ctx)) != NULL)
769 89541eee 2021-04-13 op strlcpy(req.version, t, sizeof(req.version));
770 89541eee 2021-04-13 op if ((t = tls_conn_cipher(c->ctx)) != NULL)
771 89541eee 2021-04-13 op strlcpy(req.cipher, t, sizeof(req.cipher));
772 bc99d868 2021-03-19 op
773 89541eee 2021-04-13 op req.cipher_strength = tls_conn_cipher_strength(c->ctx);
774 bc99d868 2021-03-19 op req.notbefore = tls_peer_cert_notbefore(c->ctx);
775 bc99d868 2021-03-19 op req.notafter = tls_peer_cert_notafter(c->ctx);
776 bc99d868 2021-03-19 op
777 b8e64ccd 2021-03-31 op req.host_off = host_nth(c->host);
778 1feaf2a6 2021-05-15 op req.loc_off = c->loc;
779 bc99d868 2021-03-19 op
780 bc99d868 2021-03-19 op imsg_compose(&exibuf, IMSG_CGI_REQ, c->id, 0, -1, &req, sizeof(req));
781 bc99d868 2021-03-19 op imsg_flush(&exibuf);
782 bc99d868 2021-03-19 op
783 bc99d868 2021-03-19 op close(c->pfd);
784 d3a08f4d 2021-01-17 op }
785 d3a08f4d 2021-01-17 op
786 fe406389 2021-02-02 op static void
787 abc007d2 2021-02-08 op open_dir(struct client *c)
788 d3a08f4d 2021-01-17 op {
789 d3a08f4d 2021-01-17 op size_t len;
790 11c98667 2021-04-25 op int dirfd, root;
791 252908e6 2021-01-24 op char *before_file;
792 11c98667 2021-04-25 op
793 11c98667 2021-04-25 op root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
794 d1ca3911 2021-01-21 op
795 0be51733 2021-01-20 op len = strlen(c->iri.path);
796 252908e6 2021-01-24 op if (len > 0 && !ends_with(c->iri.path, "/")) {
797 abc007d2 2021-02-08 op redirect_canonical_dir(c);
798 0be51733 2021-01-20 op return;
799 d3a08f4d 2021-01-17 op }
800 d3a08f4d 2021-01-17 op
801 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
802 d1ca3911 2021-01-21 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
803 d1ca3911 2021-01-21 op if (!ends_with(c->sbuf, "/"))
804 0be51733 2021-01-20 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
805 252908e6 2021-01-24 op before_file = strchr(c->sbuf, '\0');
806 c8b74339 2021-01-24 op len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
807 c8b74339 2021-01-24 op sizeof(c->sbuf));
808 252908e6 2021-01-24 op if (len >= sizeof(c->sbuf)) {
809 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
810 252908e6 2021-01-24 op return;
811 252908e6 2021-01-24 op }
812 d3a08f4d 2021-01-17 op
813 252908e6 2021-01-24 op c->iri.path = c->sbuf;
814 252908e6 2021-01-24 op
815 252908e6 2021-01-24 op /* close later unless we have to generate the dir listing */
816 abc007d2 2021-02-08 op dirfd = c->pfd;
817 abc007d2 2021-02-08 op c->pfd = -1;
818 252908e6 2021-01-24 op
819 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
820 252908e6 2021-01-24 op case FILE_EXECUTABLE:
821 eecad7a3 2021-02-12 op if (c->host->cgi != NULL && matches(c->host->cgi, c->iri.path)) {
822 abc007d2 2021-02-08 op start_cgi(c->iri.path, "", c);
823 252908e6 2021-01-24 op break;
824 252908e6 2021-01-24 op }
825 252908e6 2021-01-24 op
826 252908e6 2021-01-24 op /* fallthrough */
827 252908e6 2021-01-24 op
828 252908e6 2021-01-24 op case FILE_EXISTS:
829 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
830 98ee8406 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
831 252908e6 2021-01-24 op break;
832 252908e6 2021-01-24 op
833 252908e6 2021-01-24 op case FILE_DIRECTORY:
834 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
835 252908e6 2021-01-24 op break;
836 252908e6 2021-01-24 op
837 252908e6 2021-01-24 op case FILE_MISSING:
838 252908e6 2021-01-24 op *before_file = '\0';
839 252908e6 2021-01-24 op
840 252908e6 2021-01-24 op if (!vhost_auto_index(c->host, c->iri.path)) {
841 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
842 252908e6 2021-01-24 op break;
843 252908e6 2021-01-24 op }
844 252908e6 2021-01-24 op
845 efe7d180 2021-10-02 op c->type = REQUEST_DIR;
846 252908e6 2021-01-24 op
847 e76f2c74 2021-04-25 op c->dirlen = scandir_fd(dirfd, &c->dir,
848 11c98667 2021-04-25 op root ? select_non_dotdot : select_non_dot,
849 11c98667 2021-04-25 op alphasort);
850 11c98667 2021-04-25 op if (c->dirlen == -1) {
851 11c98667 2021-04-25 op log_err(c, "scandir_fd(%d) (vhost:%s) %s: %s",
852 abc007d2 2021-02-08 op c->pfd, c->host->domain, c->iri.path, strerror(errno));
853 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
854 252908e6 2021-01-24 op return;
855 252908e6 2021-01-24 op }
856 11c98667 2021-04-25 op c->diroff = 0;
857 252908e6 2021-01-24 op c->off = 0;
858 252908e6 2021-01-24 op
859 4842c72d 2021-10-18 op start_reply(c, SUCCESS, "text/gemini");
860 efe7d180 2021-10-02 op evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
861 efe7d180 2021-10-02 op "# Index of %s\n\n", c->iri.path);
862 252908e6 2021-01-24 op return;
863 252908e6 2021-01-24 op
864 252908e6 2021-01-24 op default:
865 252908e6 2021-01-24 op /* unreachable */
866 252908e6 2021-01-24 op abort();
867 252908e6 2021-01-24 op }
868 252908e6 2021-01-24 op
869 252908e6 2021-01-24 op close(dirfd);
870 252908e6 2021-01-24 op }
871 252908e6 2021-01-24 op
872 fe406389 2021-02-02 op static void
873 abc007d2 2021-02-08 op redirect_canonical_dir(struct client *c)
874 252908e6 2021-01-24 op {
875 252908e6 2021-01-24 op size_t len;
876 252908e6 2021-01-24 op
877 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
878 252908e6 2021-01-24 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
879 252908e6 2021-01-24 op len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
880 252908e6 2021-01-24 op
881 0be51733 2021-01-20 op if (len >= sizeof(c->sbuf)) {
882 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
883 0be51733 2021-01-20 op return;
884 0be51733 2021-01-20 op }
885 0be51733 2021-01-20 op
886 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
887 d3a08f4d 2021-01-17 op }
888 5f715ce4 2021-02-02 op
889 fe406389 2021-02-02 op static void
890 efe7d180 2021-10-02 op client_tls_readcb(int fd, short event, void *d)
891 5f715ce4 2021-02-02 op {
892 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
893 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
894 efe7d180 2021-10-02 op ssize_t ret;
895 efe7d180 2021-10-02 op size_t len;
896 efe7d180 2021-10-02 op int what = EVBUFFER_READ;
897 efe7d180 2021-10-02 op int howmuch = IBUF_READ_SIZE;
898 efe7d180 2021-10-02 op char buf[IBUF_READ_SIZE];
899 d3a08f4d 2021-01-17 op
900 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
901 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
902 efe7d180 2021-10-02 op goto err;
903 5f715ce4 2021-02-02 op }
904 5f715ce4 2021-02-02 op
905 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0)
906 efe7d180 2021-10-02 op howmuch = MIN(sizeof(buf), bufev->wm_read.high);
907 5f715ce4 2021-02-02 op
908 efe7d180 2021-10-02 op switch (ret = tls_read(client->ctx, buf, howmuch)) {
909 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
910 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
911 efe7d180 2021-10-02 op goto retry;
912 efe7d180 2021-10-02 op case -1:
913 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
914 efe7d180 2021-10-02 op goto err;
915 efe7d180 2021-10-02 op }
916 efe7d180 2021-10-02 op len = ret;
917 5f715ce4 2021-02-02 op
918 efe7d180 2021-10-02 op if (len == 0) {
919 efe7d180 2021-10-02 op what |= EVBUFFER_EOF;
920 efe7d180 2021-10-02 op goto err;
921 5f715ce4 2021-02-02 op }
922 5f715ce4 2021-02-02 op
923 efe7d180 2021-10-02 op if (evbuffer_add(bufev->input, buf, len) == -1) {
924 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
925 efe7d180 2021-10-02 op goto err;
926 efe7d180 2021-10-02 op }
927 5f715ce4 2021-02-02 op
928 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
929 efe7d180 2021-10-02 op if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
930 efe7d180 2021-10-02 op return;
931 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
932 efe7d180 2021-10-02 op /*
933 efe7d180 2021-10-02 op * here we could implement a read pressure policy.
934 efe7d180 2021-10-02 op */
935 efe7d180 2021-10-02 op }
936 252908e6 2021-01-24 op
937 efe7d180 2021-10-02 op if (bufev->readcb != NULL)
938 efe7d180 2021-10-02 op (*bufev->readcb)(bufev, bufev->cbarg);
939 11c98667 2021-04-25 op
940 efe7d180 2021-10-02 op return;
941 11c98667 2021-04-25 op
942 efe7d180 2021-10-02 op retry:
943 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
944 efe7d180 2021-10-02 op return;
945 efe7d180 2021-10-02 op
946 efe7d180 2021-10-02 op err:
947 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
948 252908e6 2021-01-24 op }
949 252908e6 2021-01-24 op
950 fe406389 2021-02-02 op static void
951 efe7d180 2021-10-02 op client_tls_writecb(int fd, short event, void *d)
952 252908e6 2021-01-24 op {
953 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
954 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
955 efe7d180 2021-10-02 op ssize_t ret;
956 efe7d180 2021-10-02 op size_t len;
957 efe7d180 2021-10-02 op short what = EVBUFFER_WRITE;
958 252908e6 2021-01-24 op
959 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
960 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
961 efe7d180 2021-10-02 op goto err;
962 efe7d180 2021-10-02 op }
963 252908e6 2021-01-24 op
964 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0) {
965 efe7d180 2021-10-02 op ret = tls_write(client->ctx,
966 efe7d180 2021-10-02 op EVBUFFER_DATA(bufev->output),
967 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output));
968 efe7d180 2021-10-02 op switch (ret) {
969 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
970 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
971 efe7d180 2021-10-02 op goto retry;
972 efe7d180 2021-10-02 op case -1:
973 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
974 efe7d180 2021-10-02 op goto err;
975 252908e6 2021-01-24 op }
976 efe7d180 2021-10-02 op len = ret;
977 efe7d180 2021-10-02 op evbuffer_drain(bufev->output, len);
978 252908e6 2021-01-24 op }
979 252908e6 2021-01-24 op
980 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0)
981 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
982 efe7d180 2021-10-02 op
983 efe7d180 2021-10-02 op if (bufev->writecb != NULL &&
984 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
985 efe7d180 2021-10-02 op (*bufev->writecb)(bufev, bufev->cbarg);
986 efe7d180 2021-10-02 op return;
987 efe7d180 2021-10-02 op
988 efe7d180 2021-10-02 op retry:
989 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
990 efe7d180 2021-10-02 op return;
991 efe7d180 2021-10-02 op err:
992 efe7d180 2021-10-02 op log_err(client, "tls error: %s", tls_error(client->ctx));
993 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
994 252908e6 2021-01-24 op }
995 252908e6 2021-01-24 op
996 fe406389 2021-02-02 op static void
997 efe7d180 2021-10-02 op client_read(struct bufferevent *bev, void *d)
998 3309ef97 2021-01-23 op {
999 efe7d180 2021-10-02 op struct client *c = d;
1000 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
1001 efe7d180 2021-10-02 op const char *parse_err = "invalid request";
1002 efe7d180 2021-10-02 op char decoded[DOMAIN_NAME_LEN];
1003 efe7d180 2021-10-02 op size_t len;
1004 3309ef97 2021-01-23 op
1005 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ);
1006 901905e0 2022-01-05 op
1007 901905e0 2022-01-05 op /*
1008 901905e0 2022-01-05 op * libevent2 can still somehow call this function, even
1009 901905e0 2022-01-05 op * though I never enable EV_READ in the bufferevent. If
1010 901905e0 2022-01-05 op * that's the case, bail out.
1011 901905e0 2022-01-05 op */
1012 901905e0 2022-01-05 op if (c->type != REQUEST_UNDECIDED)
1013 901905e0 2022-01-05 op return;
1014 abc007d2 2021-02-08 op
1015 efe7d180 2021-10-02 op /* max url len + \r\n */
1016 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(src) > 1024 + 2) {
1017 efe7d180 2021-10-02 op log_err(c, "too much data received");
1018 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "bad request");
1019 efe7d180 2021-10-02 op return;
1020 efe7d180 2021-10-02 op }
1021 3309ef97 2021-01-23 op
1022 efe7d180 2021-10-02 op c->req = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
1023 efe7d180 2021-10-02 op if (c->req == NULL) {
1024 efe7d180 2021-10-02 op /* not enough data yet. */
1025 efe7d180 2021-10-02 op bufferevent_enable(bev, EVBUFFER_READ);
1026 35744950 2021-02-01 op return;
1027 3309ef97 2021-01-23 op }
1028 3309ef97 2021-01-23 op
1029 efe7d180 2021-10-02 op if (!parse_iri(c->req, &c->iri, &parse_err) ||
1030 efe7d180 2021-10-02 op !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
1031 efe7d180 2021-10-02 op log_err(c, "IRI parse error: %s", parse_err);
1032 807a80cb 2021-10-06 op start_reply(c, BAD_REQUEST, "bad request");
1033 efe7d180 2021-10-02 op return;
1034 efe7d180 2021-10-02 op }
1035 3309ef97 2021-01-23 op
1036 72b033ef 2021-12-29 op if (apply_reverse_proxy(c))
1037 72b033ef 2021-12-29 op return;
1038 72b033ef 2021-12-29 op
1039 52c92ef6 2021-12-09 op /* ignore the port number */
1040 52c92ef6 2021-12-09 op if (strcmp(c->iri.schema, "gemini") ||
1041 efe7d180 2021-10-02 op strcmp(decoded, c->domain)) {
1042 efe7d180 2021-10-02 op start_reply(c, PROXY_REFUSED, "won't proxy request");
1043 efe7d180 2021-10-02 op return;
1044 efe7d180 2021-10-02 op }
1045 3309ef97 2021-01-23 op
1046 efe7d180 2021-10-02 op if (apply_require_ca(c) ||
1047 efe7d180 2021-10-02 op apply_block_return(c)||
1048 efe7d180 2021-10-02 op apply_fastcgi(c))
1049 35744950 2021-02-01 op return;
1050 efe7d180 2021-10-02 op
1051 efe7d180 2021-10-02 op if (c->host->entrypoint != NULL) {
1052 efe7d180 2021-10-02 op c->loc = 0;
1053 efe7d180 2021-10-02 op start_cgi(c->host->entrypoint, c->iri.path, c);
1054 efe7d180 2021-10-02 op return;
1055 35744950 2021-02-01 op }
1056 abc007d2 2021-02-08 op
1057 efe7d180 2021-10-02 op open_file(c);
1058 3309ef97 2021-01-23 op }
1059 3309ef97 2021-01-23 op
1060 efe7d180 2021-10-02 op void
1061 efe7d180 2021-10-02 op client_write(struct bufferevent *bev, void *d)
1062 d3a08f4d 2021-01-17 op {
1063 efe7d180 2021-10-02 op struct client *c = d;
1064 efe7d180 2021-10-02 op struct evbuffer *out = EVBUFFER_OUTPUT(bev);
1065 efe7d180 2021-10-02 op char buf[BUFSIZ];
1066 efe7d180 2021-10-02 op ssize_t r;
1067 d3a08f4d 2021-01-17 op
1068 efe7d180 2021-10-02 op switch (c->type) {
1069 efe7d180 2021-10-02 op case REQUEST_UNDECIDED:
1070 efe7d180 2021-10-02 op /*
1071 efe7d180 2021-10-02 op * Ignore spurious calls when we still don't have idea
1072 efe7d180 2021-10-02 op * what to do with the request.
1073 efe7d180 2021-10-02 op */
1074 efe7d180 2021-10-02 op break;
1075 d3a08f4d 2021-01-17 op
1076 efe7d180 2021-10-02 op case REQUEST_FILE:
1077 efe7d180 2021-10-02 op if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1078 efe7d180 2021-10-02 op log_warn(c, "read: %s", strerror(errno));
1079 efe7d180 2021-10-02 op client_error(bev, EVBUFFER_ERROR, c);
1080 efe7d180 2021-10-02 op return;
1081 efe7d180 2021-10-02 op } else if (r == 0) {
1082 efe7d180 2021-10-02 op client_close(c);
1083 efe7d180 2021-10-02 op return;
1084 efe7d180 2021-10-02 op } else if (r != sizeof(buf))
1085 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1086 efe7d180 2021-10-02 op bufferevent_write(bev, buf, r);
1087 efe7d180 2021-10-02 op break;
1088 d3a08f4d 2021-01-17 op
1089 efe7d180 2021-10-02 op case REQUEST_DIR:
1090 efe7d180 2021-10-02 op /* TODO: handle big big directories better */
1091 efe7d180 2021-10-02 op for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1092 efe7d180 2021-10-02 op evbuffer_add_printf(out, "=> %s\n",
1093 efe7d180 2021-10-02 op c->dir[c->diroff]->d_name);
1094 efe7d180 2021-10-02 op free(c->dir[c->diroff]);
1095 d3a08f4d 2021-01-17 op }
1096 efe7d180 2021-10-02 op free(c->dir);
1097 efe7d180 2021-10-02 op c->dir = NULL;
1098 27b2fa9a 2021-02-12 op
1099 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1100 efe7d180 2021-10-02 op
1101 efe7d180 2021-10-02 op event_add(&c->bev->ev_write, NULL);
1102 efe7d180 2021-10-02 op break;
1103 efe7d180 2021-10-02 op
1104 efe7d180 2021-10-02 op case REQUEST_CGI:
1105 efe7d180 2021-10-02 op case REQUEST_FCGI:
1106 72b033ef 2021-12-29 op case REQUEST_PROXY:
1107 efe7d180 2021-10-02 op /*
1108 876a4170 2022-01-05 op * Here we depend on the cgi/fastcgi or proxy
1109 876a4170 2022-01-05 op * connection to provide data.
1110 efe7d180 2021-10-02 op */
1111 efe7d180 2021-10-02 op break;
1112 efe7d180 2021-10-02 op
1113 efe7d180 2021-10-02 op case REQUEST_DONE:
1114 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(out) == 0)
1115 efe7d180 2021-10-02 op client_close(c);
1116 efe7d180 2021-10-02 op break;
1117 d3a08f4d 2021-01-17 op }
1118 efe7d180 2021-10-02 op }
1119 d3a08f4d 2021-01-17 op
1120 efe7d180 2021-10-02 op static void
1121 efe7d180 2021-10-02 op client_error(struct bufferevent *bev, short error, void *d)
1122 efe7d180 2021-10-02 op {
1123 efe7d180 2021-10-02 op struct client *c = d;
1124 efe7d180 2021-10-02 op
1125 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1126 efe7d180 2021-10-02 op
1127 efe7d180 2021-10-02 op if (error & EVBUFFER_TIMEOUT) {
1128 efe7d180 2021-10-02 op log_warn(c, "timeout reached, "
1129 efe7d180 2021-10-02 op "forcefully closing the connection");
1130 efe7d180 2021-10-02 op if (c->code == 0)
1131 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "timeout");
1132 efe7d180 2021-10-02 op else
1133 efe7d180 2021-10-02 op client_close(c);
1134 efe7d180 2021-10-02 op return;
1135 efe7d180 2021-10-02 op }
1136 efe7d180 2021-10-02 op
1137 efe7d180 2021-10-02 op if (error & EVBUFFER_EOF) {
1138 efe7d180 2021-10-02 op client_close(c);
1139 efe7d180 2021-10-02 op return;
1140 efe7d180 2021-10-02 op }
1141 efe7d180 2021-10-02 op
1142 efe7d180 2021-10-02 op log_err(c, "unknown bufferevent error: %s", strerror(errno));
1143 efe7d180 2021-10-02 op client_close(c);
1144 d3a08f4d 2021-01-17 op }
1145 d3a08f4d 2021-01-17 op
1146 8ad1c570 2021-05-09 op void
1147 efe7d180 2021-10-02 op start_reply(struct client *c, int code, const char *meta)
1148 d3a08f4d 2021-01-17 op {
1149 efe7d180 2021-10-02 op struct evbuffer *evb = EVBUFFER_OUTPUT(c->bev);
1150 efe7d180 2021-10-02 op const char *lang;
1151 efe7d180 2021-10-02 op int r, rr;
1152 efe7d180 2021-10-02 op
1153 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EVBUFFER_WRITE);
1154 efe7d180 2021-10-02 op
1155 efe7d180 2021-10-02 op c->code = code;
1156 efe7d180 2021-10-02 op c->meta = meta;
1157 efe7d180 2021-10-02 op
1158 efe7d180 2021-10-02 op r = evbuffer_add_printf(evb, "%d %s", code, meta);
1159 efe7d180 2021-10-02 op if (r == -1)
1160 efe7d180 2021-10-02 op goto err;
1161 efe7d180 2021-10-02 op
1162 efe7d180 2021-10-02 op /* 2 digit status + space + 1024 max reply */
1163 efe7d180 2021-10-02 op if (r > 1027)
1164 efe7d180 2021-10-02 op goto overflow;
1165 efe7d180 2021-10-02 op
1166 efe7d180 2021-10-02 op if (c->type != REQUEST_CGI &&
1167 efe7d180 2021-10-02 op c->type != REQUEST_FCGI &&
1168 72b033ef 2021-12-29 op c->type != REQUEST_PROXY &&
1169 efe7d180 2021-10-02 op !strcmp(meta, "text/gemini") &&
1170 efe7d180 2021-10-02 op (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1171 4842c72d 2021-10-18 op rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1172 efe7d180 2021-10-02 op if (rr == -1)
1173 efe7d180 2021-10-02 op goto err;
1174 efe7d180 2021-10-02 op if (r + rr > 1027)
1175 efe7d180 2021-10-02 op goto overflow;
1176 efe7d180 2021-10-02 op }
1177 efe7d180 2021-10-02 op
1178 efe7d180 2021-10-02 op bufferevent_write(c->bev, "\r\n", 2);
1179 efe7d180 2021-10-02 op
1180 efe7d180 2021-10-02 op if (!vhost_disable_log(c->host, c->iri.path))
1181 efe7d180 2021-10-02 op log_request(c, EVBUFFER_DATA(evb), EVBUFFER_LENGTH(evb));
1182 efe7d180 2021-10-02 op
1183 d28bd963 2022-01-27 op if (code != 20)
1184 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1185 efe7d180 2021-10-02 op
1186 efe7d180 2021-10-02 op return;
1187 efe7d180 2021-10-02 op
1188 efe7d180 2021-10-02 op err:
1189 efe7d180 2021-10-02 op log_err(c, "evbuffer_add_printf error: no memory");
1190 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1191 efe7d180 2021-10-02 op client_close(c);
1192 efe7d180 2021-10-02 op return;
1193 efe7d180 2021-10-02 op
1194 efe7d180 2021-10-02 op overflow:
1195 efe7d180 2021-10-02 op log_warn(c, "reply header overflow");
1196 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1197 efe7d180 2021-10-02 op start_reply(c, TEMP_FAILURE, "internal error");
1198 efe7d180 2021-10-02 op }
1199 efe7d180 2021-10-02 op
1200 efe7d180 2021-10-02 op static void
1201 efe7d180 2021-10-02 op client_close_ev(int fd, short event, void *d)
1202 efe7d180 2021-10-02 op {
1203 8ad1c570 2021-05-09 op struct client *c = d;
1204 d3a08f4d 2021-01-17 op
1205 d3a08f4d 2021-01-17 op switch (tls_close(c->ctx)) {
1206 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
1207 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1208 efe7d180 2021-10-02 op break;
1209 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
1210 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1211 efe7d180 2021-10-02 op break;
1212 d3a08f4d 2021-01-17 op }
1213 d3a08f4d 2021-01-17 op
1214 d3a08f4d 2021-01-17 op connected_clients--;
1215 e4daebe4 2021-10-06 op
1216 e4daebe4 2021-10-06 op free(c->req);
1217 d3a08f4d 2021-01-17 op
1218 d3a08f4d 2021-01-17 op tls_free(c->ctx);
1219 d3a08f4d 2021-01-17 op c->ctx = NULL;
1220 d3a08f4d 2021-01-17 op
1221 efe7d180 2021-10-02 op free(c->header);
1222 efe7d180 2021-10-02 op
1223 abc007d2 2021-02-08 op if (c->pfd != -1)
1224 abc007d2 2021-02-08 op close(c->pfd);
1225 d3a08f4d 2021-01-17 op
1226 252908e6 2021-01-24 op if (c->dir != NULL)
1227 11c98667 2021-04-25 op free(c->dir);
1228 252908e6 2021-01-24 op
1229 abc007d2 2021-02-08 op close(c->fd);
1230 abc007d2 2021-02-08 op c->fd = -1;
1231 72b033ef 2021-12-29 op }
1232 72b033ef 2021-12-29 op
1233 72b033ef 2021-12-29 op static void
1234 72b033ef 2021-12-29 op client_proxy_close(int fd, short event, void *d)
1235 72b033ef 2021-12-29 op {
1236 72b033ef 2021-12-29 op struct tls *ctx = d;
1237 72b033ef 2021-12-29 op
1238 72b033ef 2021-12-29 op if (ctx == NULL) {
1239 72b033ef 2021-12-29 op close(fd);
1240 72b033ef 2021-12-29 op return;
1241 72b033ef 2021-12-29 op }
1242 72b033ef 2021-12-29 op
1243 72b033ef 2021-12-29 op switch (tls_close(ctx)) {
1244 72b033ef 2021-12-29 op case TLS_WANT_POLLIN:
1245 72b033ef 2021-12-29 op event_once(fd, EV_READ, client_proxy_close, d, NULL);
1246 72b033ef 2021-12-29 op break;
1247 72b033ef 2021-12-29 op case TLS_WANT_POLLOUT:
1248 72b033ef 2021-12-29 op event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1249 72b033ef 2021-12-29 op break;
1250 72b033ef 2021-12-29 op }
1251 72b033ef 2021-12-29 op
1252 72b033ef 2021-12-29 op tls_free(ctx);
1253 72b033ef 2021-12-29 op close(fd);
1254 f890c8c5 2021-01-22 op }
1255 f890c8c5 2021-01-22 op
1256 efe7d180 2021-10-02 op void
1257 efe7d180 2021-10-02 op client_close(struct client *c)
1258 efe7d180 2021-10-02 op {
1259 efe7d180 2021-10-02 op /*
1260 efe7d180 2021-10-02 op * We may end up calling client_close in various situations
1261 efe7d180 2021-10-02 op * and for the most unexpected reasons. Therefore, we need to
1262 b9b77f53 2022-01-27 op * ensure that everything gets properly released once we reach
1263 efe7d180 2021-10-02 op * this point.
1264 efe7d180 2021-10-02 op */
1265 207b3e80 2021-10-07 op
1266 207b3e80 2021-10-07 op SPLAY_REMOVE(client_tree_id, &clients, c);
1267 efe7d180 2021-10-02 op
1268 efe7d180 2021-10-02 op if (c->cgibev != NULL) {
1269 efe7d180 2021-10-02 op bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1270 efe7d180 2021-10-02 op bufferevent_free(c->cgibev);
1271 efe7d180 2021-10-02 op c->cgibev = NULL;
1272 efe7d180 2021-10-02 op close(c->pfd);
1273 efe7d180 2021-10-02 op c->pfd = -1;
1274 efe7d180 2021-10-02 op }
1275 efe7d180 2021-10-02 op
1276 efe7d180 2021-10-02 op bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1277 efe7d180 2021-10-02 op bufferevent_free(c->bev);
1278 efe7d180 2021-10-02 op c->bev = NULL;
1279 efe7d180 2021-10-02 op
1280 e0f6dc64 2022-01-27 op if (c->proxyevset &&
1281 e0f6dc64 2022-01-27 op event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1282 e0f6dc64 2022-01-27 op c->proxyevset = 0;
1283 e0f6dc64 2022-01-27 op event_del(&c->proxyev);
1284 e0f6dc64 2022-01-27 op }
1285 72b033ef 2021-12-29 op
1286 e0f6dc64 2022-01-27 op if (c->pfd != -1 && c->proxyctx != NULL) {
1287 e0f6dc64 2022-01-27 op /* shut down the proxy TLS connection */
1288 e0f6dc64 2022-01-27 op client_proxy_close(c->pfd, 0, c->proxyctx);
1289 e0f6dc64 2022-01-27 op c->pfd = -1;
1290 72b033ef 2021-12-29 op }
1291 e0f6dc64 2022-01-27 op
1292 e0f6dc64 2022-01-27 op if (c->proxybev != NULL)
1293 e0f6dc64 2022-01-27 op bufferevent_free(c->proxybev);
1294 72b033ef 2021-12-29 op
1295 efe7d180 2021-10-02 op client_close_ev(c->fd, 0, c);
1296 efe7d180 2021-10-02 op }
1297 efe7d180 2021-10-02 op
1298 fe406389 2021-02-02 op static void
1299 efe7d180 2021-10-02 op cgi_read(struct bufferevent *bev, void *d)
1300 efe7d180 2021-10-02 op {
1301 efe7d180 2021-10-02 op struct client *client = d;
1302 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
1303 efe7d180 2021-10-02 op char *header;
1304 efe7d180 2021-10-02 op size_t len;
1305 efe7d180 2021-10-02 op int code;
1306 efe7d180 2021-10-02 op
1307 efe7d180 2021-10-02 op /* intercept the header */
1308 efe7d180 2021-10-02 op if (client->code == 0) {
1309 efe7d180 2021-10-02 op header = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
1310 efe7d180 2021-10-02 op if (header == NULL) {
1311 efe7d180 2021-10-02 op /* max reply + \r\n */
1312 6a6b4a2a 2021-12-29 op if (EVBUFFER_LENGTH(src) > 1029) {
1313 efe7d180 2021-10-02 op log_warn(client, "CGI script is trying to "
1314 efe7d180 2021-10-02 op "send a header too long.");
1315 efe7d180 2021-10-02 op cgi_error(bev, EVBUFFER_READ, client);
1316 efe7d180 2021-10-02 op }
1317 efe7d180 2021-10-02 op
1318 efe7d180 2021-10-02 op /* wait a bit */
1319 efe7d180 2021-10-02 op return;
1320 efe7d180 2021-10-02 op }
1321 efe7d180 2021-10-02 op
1322 efe7d180 2021-10-02 op if (len < 3 || len > 1029 ||
1323 efe7d180 2021-10-02 op !isdigit(header[0]) ||
1324 efe7d180 2021-10-02 op !isdigit(header[1]) ||
1325 efe7d180 2021-10-02 op !isspace(header[2])) {
1326 efe7d180 2021-10-02 op free(header);
1327 efe7d180 2021-10-02 op log_warn(client, "CGI script is trying to send a "
1328 efe7d180 2021-10-02 op "malformed header");
1329 efe7d180 2021-10-02 op cgi_error(bev, EVBUFFER_READ, client);
1330 efe7d180 2021-10-02 op return;
1331 efe7d180 2021-10-02 op }
1332 efe7d180 2021-10-02 op
1333 efe7d180 2021-10-02 op client->header = header;
1334 efe7d180 2021-10-02 op code = (header[0] - '0') * 10 + (header[1] - '0');
1335 efe7d180 2021-10-02 op
1336 efe7d180 2021-10-02 op if (code < 10 || code >= 70) {
1337 efe7d180 2021-10-02 op log_warn(client, "CGI script is trying to send an "
1338 efe7d180 2021-10-02 op "invalid reply code (%d)", code);
1339 efe7d180 2021-10-02 op cgi_error(bev, EVBUFFER_READ, client);
1340 efe7d180 2021-10-02 op return;
1341 efe7d180 2021-10-02 op }
1342 efe7d180 2021-10-02 op
1343 efe7d180 2021-10-02 op start_reply(client, code, header + 3);
1344 efe7d180 2021-10-02 op
1345 efe7d180 2021-10-02 op if (client->code < 20 || client->code > 29) {
1346 efe7d180 2021-10-02 op cgi_error(client->cgibev, EVBUFFER_EOF, client);
1347 efe7d180 2021-10-02 op return;
1348 efe7d180 2021-10-02 op }
1349 efe7d180 2021-10-02 op }
1350 efe7d180 2021-10-02 op
1351 efe7d180 2021-10-02 op bufferevent_write_buffer(client->bev, src);
1352 efe7d180 2021-10-02 op }
1353 efe7d180 2021-10-02 op
1354 efe7d180 2021-10-02 op static void
1355 efe7d180 2021-10-02 op cgi_write(struct bufferevent *bev, void *d)
1356 efe7d180 2021-10-02 op {
1357 efe7d180 2021-10-02 op /*
1358 efe7d180 2021-10-02 op * Never called. We don't send data to a CGI script.
1359 efe7d180 2021-10-02 op */
1360 efe7d180 2021-10-02 op abort();
1361 efe7d180 2021-10-02 op }
1362 efe7d180 2021-10-02 op
1363 efe7d180 2021-10-02 op static void
1364 efe7d180 2021-10-02 op cgi_error(struct bufferevent *bev, short error, void *d)
1365 efe7d180 2021-10-02 op {
1366 efe7d180 2021-10-02 op struct client *client = d;
1367 efe7d180 2021-10-02 op
1368 efe7d180 2021-10-02 op if (error & EVBUFFER_ERROR)
1369 efe7d180 2021-10-02 op log_err(client, "%s: evbuffer error (%x): %s",
1370 efe7d180 2021-10-02 op __func__, error, strerror(errno));
1371 efe7d180 2021-10-02 op
1372 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ|EVBUFFER_WRITE);
1373 efe7d180 2021-10-02 op bufferevent_free(bev);
1374 efe7d180 2021-10-02 op client->cgibev = NULL;
1375 efe7d180 2021-10-02 op
1376 efe7d180 2021-10-02 op close(client->pfd);
1377 efe7d180 2021-10-02 op client->pfd = -1;
1378 efe7d180 2021-10-02 op
1379 efe7d180 2021-10-02 op client->type = REQUEST_DONE;
1380 efe7d180 2021-10-02 op if (client->code != 0)
1381 efe7d180 2021-10-02 op client_write(client->bev, client);
1382 efe7d180 2021-10-02 op else
1383 efe7d180 2021-10-02 op start_reply(client, CGI_ERROR, "CGI error");
1384 efe7d180 2021-10-02 op }
1385 efe7d180 2021-10-02 op
1386 efe7d180 2021-10-02 op static void
1387 abc007d2 2021-02-08 op do_accept(int sock, short et, void *d)
1388 d3a08f4d 2021-01-17 op {
1389 abc007d2 2021-02-08 op struct client *c;
1390 d3a08f4d 2021-01-17 op struct sockaddr_storage addr;
1391 abc007d2 2021-02-08 op struct sockaddr *saddr;
1392 d3a08f4d 2021-01-17 op socklen_t len;
1393 207b3e80 2021-10-07 op int fd;
1394 abc007d2 2021-02-08 op
1395 abc007d2 2021-02-08 op saddr = (struct sockaddr*)&addr;
1396 d3a08f4d 2021-01-17 op len = sizeof(addr);
1397 3cb3dd4d 2021-02-12 op if ((fd = accept(sock, saddr, &len)) == -1) {
1398 c62a411f 2021-10-13 op if (errno == EWOULDBLOCK || errno == EAGAIN ||
1399 c62a411f 2021-10-13 op errno == ECONNABORTED)
1400 d3a08f4d 2021-01-17 op return;
1401 d3a08f4d 2021-01-17 op fatal("accept: %s", strerror(errno));
1402 d3a08f4d 2021-01-17 op }
1403 d3a08f4d 2021-01-17 op
1404 3cb3dd4d 2021-02-12 op mark_nonblock(fd);
1405 3cb3dd4d 2021-02-12 op
1406 207b3e80 2021-10-07 op c = xcalloc(1, sizeof(*c));
1407 207b3e80 2021-10-07 op c->id = ++server_client_id;
1408 207b3e80 2021-10-07 op c->fd = fd;
1409 207b3e80 2021-10-07 op c->pfd = -1;
1410 207b3e80 2021-10-07 op c->addr = addr;
1411 d3a08f4d 2021-01-17 op
1412 207b3e80 2021-10-07 op if (tls_accept_socket(ctx, &c->ctx, fd) == -1) {
1413 207b3e80 2021-10-07 op log_warn(c, "failed to accept socket: %s", tls_error(c->ctx));
1414 207b3e80 2021-10-07 op close(c->fd);
1415 207b3e80 2021-10-07 op free(c);
1416 207b3e80 2021-10-07 op return;
1417 d3a08f4d 2021-01-17 op }
1418 d3a08f4d 2021-01-17 op
1419 207b3e80 2021-10-07 op SPLAY_INSERT(client_tree_id, &clients, c);
1420 207b3e80 2021-10-07 op event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1421 207b3e80 2021-10-07 op connected_clients++;
1422 d3a08f4d 2021-01-17 op }
1423 d3a08f4d 2021-01-17 op
1424 8ad1c570 2021-05-09 op static struct client *
1425 bc99d868 2021-03-19 op client_by_id(int id)
1426 bc99d868 2021-03-19 op {
1427 207b3e80 2021-10-07 op struct client *c;
1428 207b3e80 2021-10-07 op
1429 207b3e80 2021-10-07 op if ((c = try_client_by_id(id)) == NULL)
1430 bc99d868 2021-03-19 op fatal("in client_by_id: invalid id %d", id);
1431 207b3e80 2021-10-07 op return c;
1432 bc99d868 2021-03-19 op }
1433 bc99d868 2021-03-19 op
1434 8ad1c570 2021-05-09 op struct client *
1435 8ad1c570 2021-05-09 op try_client_by_id(int id)
1436 8ad1c570 2021-05-09 op {
1437 207b3e80 2021-10-07 op struct client find;
1438 207b3e80 2021-10-07 op
1439 207b3e80 2021-10-07 op find.id = id;
1440 207b3e80 2021-10-07 op return SPLAY_FIND(client_tree_id, &clients, &find);
1441 8ad1c570 2021-05-09 op }
1442 8ad1c570 2021-05-09 op
1443 abc007d2 2021-02-08 op static void
1444 bc99d868 2021-03-19 op handle_imsg_cgi_res(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1445 d3a08f4d 2021-01-17 op {
1446 bc99d868 2021-03-19 op struct client *c;
1447 d3a08f4d 2021-01-17 op
1448 bc99d868 2021-03-19 op c = client_by_id(imsg->hdr.peerid);
1449 bc99d868 2021-03-19 op
1450 efe7d180 2021-10-02 op if ((c->pfd = imsg->fd) == -1) {
1451 bc99d868 2021-03-19 op start_reply(c, TEMP_FAILURE, "internal server error");
1452 efe7d180 2021-10-02 op return;
1453 efe7d180 2021-10-02 op }
1454 efe7d180 2021-10-02 op
1455 efe7d180 2021-10-02 op c->type = REQUEST_CGI;
1456 efe7d180 2021-10-02 op
1457 efe7d180 2021-10-02 op c->cgibev = bufferevent_new(c->pfd, cgi_read, cgi_write,
1458 efe7d180 2021-10-02 op cgi_error, c);
1459 efe7d180 2021-10-02 op
1460 efe7d180 2021-10-02 op bufferevent_enable(c->cgibev, EV_READ);
1461 8ad1c570 2021-05-09 op }
1462 8ad1c570 2021-05-09 op
1463 8ad1c570 2021-05-09 op static void
1464 8ad1c570 2021-05-09 op handle_imsg_fcgi_fd(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1465 8ad1c570 2021-05-09 op {
1466 8ad1c570 2021-05-09 op struct client *c;
1467 4cd25209 2021-10-07 op int id;
1468 8ad1c570 2021-05-09 op
1469 8ad1c570 2021-05-09 op id = imsg->hdr.peerid;
1470 8ad1c570 2021-05-09 op
1471 4cd25209 2021-10-07 op if ((c = try_client_by_id(id)) == NULL) {
1472 4cd25209 2021-10-07 op if (imsg->fd != -1)
1473 4cd25209 2021-10-07 op close(imsg->fd);
1474 4cd25209 2021-10-07 op return;
1475 4cd25209 2021-10-07 op }
1476 741b69be 2021-09-26 op
1477 4cd25209 2021-10-07 op if ((c->pfd = imsg->fd) == -1) {
1478 4cd25209 2021-10-07 op start_reply(c, CGI_ERROR, "CGI error");
1479 4cd25209 2021-10-07 op return;
1480 8ad1c570 2021-05-09 op }
1481 8ad1c570 2021-05-09 op
1482 4cd25209 2021-10-07 op mark_nonblock(c->pfd);
1483 8ad1c570 2021-05-09 op
1484 4cd25209 2021-10-07 op c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
1485 4cd25209 2021-10-07 op fcgi_error, c);
1486 4cd25209 2021-10-07 op if (c->cgibev == NULL) {
1487 4cd25209 2021-10-07 op start_reply(c, TEMP_FAILURE, "internal server error");
1488 4cd25209 2021-10-07 op return;
1489 8ad1c570 2021-05-09 op }
1490 4cd25209 2021-10-07 op
1491 4cd25209 2021-10-07 op bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
1492 4cd25209 2021-10-07 op fcgi_req(c);
1493 bc99d868 2021-03-19 op }
1494 bc99d868 2021-03-19 op
1495 bc99d868 2021-03-19 op static void
1496 72b033ef 2021-12-29 op handle_imsg_conn_fd(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1497 72b033ef 2021-12-29 op {
1498 72b033ef 2021-12-29 op struct client *c;
1499 72b033ef 2021-12-29 op int id;
1500 72b033ef 2021-12-29 op
1501 72b033ef 2021-12-29 op id = imsg->hdr.peerid;
1502 72b033ef 2021-12-29 op if ((c = try_client_by_id(id)) == NULL) {
1503 72b033ef 2021-12-29 op if (imsg->fd != -1)
1504 72b033ef 2021-12-29 op close(imsg->fd);
1505 72b033ef 2021-12-29 op return;
1506 72b033ef 2021-12-29 op }
1507 72b033ef 2021-12-29 op
1508 72b033ef 2021-12-29 op if ((c->pfd = imsg->fd) == -1) {
1509 72b033ef 2021-12-29 op start_reply(c, PROXY_ERROR, "proxy error");
1510 72b033ef 2021-12-29 op return;
1511 72b033ef 2021-12-29 op }
1512 72b033ef 2021-12-29 op
1513 72b033ef 2021-12-29 op mark_nonblock(c->pfd);
1514 72b033ef 2021-12-29 op
1515 72b033ef 2021-12-29 op if (proxy_init(c) == -1)
1516 72b033ef 2021-12-29 op start_reply(c, PROXY_ERROR, "proxy error");
1517 72b033ef 2021-12-29 op }
1518 72b033ef 2021-12-29 op
1519 72b033ef 2021-12-29 op static void
1520 bc99d868 2021-03-19 op handle_imsg_quit(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1521 bc99d868 2021-03-19 op {
1522 a8a1f439 2021-07-07 op /*
1523 a8a1f439 2021-07-07 op * don't call event_loopbreak since we want to finish to
1524 a8a1f439 2021-07-07 op * handle the ongoing connections.
1525 a8a1f439 2021-07-07 op */
1526 bc99d868 2021-03-19 op
1527 090b8a89 2021-07-06 op shutting_down = 1;
1528 090b8a89 2021-07-06 op
1529 a6e689d7 2021-02-12 op event_del(&e4);
1530 a6e689d7 2021-02-12 op if (has_ipv6)
1531 a6e689d7 2021-02-12 op event_del(&e6);
1532 a6e689d7 2021-02-12 op if (has_siginfo)
1533 a6e689d7 2021-02-12 op signal_del(&siginfo);
1534 bc99d868 2021-03-19 op event_del(&imsgev);
1535 a6e689d7 2021-02-12 op signal_del(&sigusr2);
1536 abc007d2 2021-02-08 op }
1537 d3a08f4d 2021-01-17 op
1538 abc007d2 2021-02-08 op static void
1539 bc99d868 2021-03-19 op handle_dispatch_imsg(int fd, short ev, void *d)
1540 bc99d868 2021-03-19 op {
1541 bc99d868 2021-03-19 op struct imsgbuf *ibuf = d;
1542 bc99d868 2021-03-19 op dispatch_imsg(ibuf, handlers, sizeof(handlers));
1543 bc99d868 2021-03-19 op }
1544 bc99d868 2021-03-19 op
1545 bc99d868 2021-03-19 op static void
1546 abc007d2 2021-02-08 op handle_siginfo(int fd, short ev, void *d)
1547 abc007d2 2021-02-08 op {
1548 abc007d2 2021-02-08 op log_info(NULL, "%d connected clients", connected_clients);
1549 abc007d2 2021-02-08 op }
1550 d3a08f4d 2021-01-17 op
1551 abc007d2 2021-02-08 op void
1552 bc99d868 2021-03-19 op loop(struct tls *ctx_, int sock4, int sock6, struct imsgbuf *ibuf)
1553 abc007d2 2021-02-08 op {
1554 bc99d868 2021-03-19 op ctx = ctx_;
1555 bc99d868 2021-03-19 op
1556 207b3e80 2021-10-07 op SPLAY_INIT(&clients);
1557 207b3e80 2021-10-07 op
1558 abc007d2 2021-02-08 op event_init();
1559 1e3ef7ab 2021-02-03 op
1560 bc99d868 2021-03-19 op event_set(&e4, sock4, EV_READ | EV_PERSIST, &do_accept, NULL);
1561 a6e689d7 2021-02-12 op event_add(&e4, NULL);
1562 ca21e100 2021-02-04 op
1563 abc007d2 2021-02-08 op if (sock6 != -1) {
1564 a6e689d7 2021-02-12 op has_ipv6 = 1;
1565 bc99d868 2021-03-19 op event_set(&e6, sock6, EV_READ | EV_PERSIST, &do_accept, NULL);
1566 a6e689d7 2021-02-12 op event_add(&e6, NULL);
1567 d3a08f4d 2021-01-17 op }
1568 abc007d2 2021-02-08 op
1569 bc99d868 2021-03-19 op event_set(&imsgev, ibuf->fd, EV_READ | EV_PERSIST, handle_dispatch_imsg, ibuf);
1570 bc99d868 2021-03-19 op event_add(&imsgev, NULL);
1571 abc007d2 2021-02-08 op
1572 abc007d2 2021-02-08 op #ifdef SIGINFO
1573 a6e689d7 2021-02-12 op has_siginfo = 1;
1574 a6e689d7 2021-02-12 op signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1575 a6e689d7 2021-02-12 op signal_add(&siginfo, NULL);
1576 abc007d2 2021-02-08 op #endif
1577 5e3285d5 2021-02-12 op signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1578 a6e689d7 2021-02-12 op signal_add(&sigusr2, NULL);
1579 abc007d2 2021-02-08 op
1580 62e001b0 2021-03-20 op sandbox_server_process();
1581 abc007d2 2021-02-08 op event_dispatch();
1582 df58efff 2021-02-08 op _exit(0);
1583 d3a08f4d 2021-01-17 op }
1584 207b3e80 2021-10-07 op
1585 207b3e80 2021-10-07 op int
1586 207b3e80 2021-10-07 op client_tree_cmp(struct client *a, struct client *b)
1587 207b3e80 2021-10-07 op {
1588 207b3e80 2021-10-07 op if (a->id == b->id)
1589 207b3e80 2021-10-07 op return 0;
1590 207b3e80 2021-10-07 op else if (a->id < b->id)
1591 207b3e80 2021-10-07 op return -1;
1592 207b3e80 2021-10-07 op else
1593 207b3e80 2021-10-07 op return +1;
1594 207b3e80 2021-10-07 op }
1595 207b3e80 2021-10-07 op
1596 207b3e80 2021-10-07 op SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)