2 d3a08f4d 2021-01-17 op * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
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.
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.
17 52418c8d 2021-02-12 op #include "gmid.h"
19 d3a08f4d 2021-01-17 op #include <sys/stat.h>
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>
30 efe7d180 2021-10-02 op #define MIN(a, b) ((a) < (b) ? (a) : (b))
32 090b8a89 2021-07-06 op int shutting_down;
34 bc99d868 2021-03-19 op static struct tls *ctx;
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;
39 d3a08f4d 2021-01-17 op int connected_clients;
41 49b73ba1 2021-02-10 op static inline int matches(const char*, const char*);
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 efe7d180 2021-10-02 op static int apply_fastcgi(struct client*);
51 02be96c6 2021-02-09 op static int apply_require_ca(struct client*);
52 b8e64ccd 2021-03-31 op static size_t host_nth(struct vhost*);
53 abc007d2 2021-02-08 op static void start_cgi(const char*, const char*, 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*);
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 *);
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 *);
64 efe7d180 2021-10-02 op static void client_close_ev(int, short, void *);
66 efe7d180 2021-10-02 op static void cgi_read(struct bufferevent *, void *);
67 efe7d180 2021-10-02 op static void cgi_write(struct bufferevent *, void *);
68 efe7d180 2021-10-02 op static void cgi_error(struct bufferevent *, short, void *);
70 abc007d2 2021-02-08 op static void do_accept(int, short, void*);
71 efe7d180 2021-10-02 op static struct client *client_by_id(int);
73 bc99d868 2021-03-19 op static void handle_imsg_cgi_res(struct imsgbuf*, struct imsg*, size_t);
74 8ad1c570 2021-05-09 op static void handle_imsg_fcgi_fd(struct imsgbuf*, struct imsg*, size_t);
75 bc99d868 2021-03-19 op static void handle_imsg_quit(struct imsgbuf*, struct imsg*, size_t);
76 efe7d180 2021-10-02 op static void handle_dispatch_imsg(int, short, void *);
77 bc99d868 2021-03-19 op static void handle_siginfo(int, short, void*);
79 bc99d868 2021-03-19 op static imsg_handlerfn *handlers[] = {
80 bc99d868 2021-03-19 op [IMSG_QUIT] = handle_imsg_quit,
81 bc99d868 2021-03-19 op [IMSG_CGI_RES] = handle_imsg_cgi_res,
82 8ad1c570 2021-05-09 op [IMSG_FCGI_FD] = handle_imsg_fcgi_fd,
85 207b3e80 2021-10-07 op static uint32_t server_client_id;
87 207b3e80 2021-10-07 op struct client_tree_id clients;
89 49b73ba1 2021-02-10 op static inline int
90 49b73ba1 2021-02-10 op matches(const char *pattern, const char *path)
92 49b73ba1 2021-02-10 op if (*path == '/')
94 49b73ba1 2021-02-10 op return !fnmatch(pattern, path, 0);
98 c8b74339 2021-01-24 op vhost_lang(struct vhost *v, const char *path)
100 c8b74339 2021-01-24 op struct location *loc;
102 caad0308 2021-01-27 op if (v == NULL || path == NULL)
105 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
106 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
107 cd761624 2021-02-06 op if (loc->lang != NULL) {
108 49b73ba1 2021-02-10 op if (matches(loc->match, path))
109 6016a593 2021-01-30 op return loc->lang;
113 b8e64ccd 2021-03-31 op return TAILQ_FIRST(&v->locations)->lang;
117 c8b74339 2021-01-24 op vhost_default_mime(struct vhost *v, const char *path)
119 c8b74339 2021-01-24 op struct location *loc;
120 c8b74339 2021-01-24 op const char *default_mime = "application/octet-stream";
122 caad0308 2021-01-27 op if (v == NULL || path == NULL)
123 caad0308 2021-01-27 op return default_mime;
125 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
126 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
127 cd761624 2021-02-06 op if (loc->default_mime != NULL) {
128 49b73ba1 2021-02-10 op if (matches(loc->match, path))
129 6016a593 2021-01-30 op return loc->default_mime;
133 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
134 b8e64ccd 2021-03-31 op if (loc->default_mime != NULL)
135 b8e64ccd 2021-03-31 op return loc->default_mime;
136 c8b74339 2021-01-24 op return default_mime;
140 c8b74339 2021-01-24 op vhost_index(struct vhost *v, const char *path)
142 c8b74339 2021-01-24 op struct location *loc;
143 c8b74339 2021-01-24 op const char *index = "index.gmi";
145 caad0308 2021-01-27 op if (v == NULL || path == NULL)
146 caad0308 2021-01-27 op return index;
148 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
149 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
150 cd761624 2021-02-06 op if (loc->index != NULL) {
151 49b73ba1 2021-02-10 op if (matches(loc->match, path))
152 6016a593 2021-01-30 op return loc->index;
156 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
157 b8e64ccd 2021-03-31 op if (loc->index != NULL)
158 b8e64ccd 2021-03-31 op return loc->index;
159 c8b74339 2021-01-24 op return index;
163 252908e6 2021-01-24 op vhost_auto_index(struct vhost *v, const char *path)
165 252908e6 2021-01-24 op struct location *loc;
167 6016a593 2021-01-30 op if (v == NULL || path == NULL)
170 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
171 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
172 cd761624 2021-02-06 op if (loc->auto_index != 0) {
173 49b73ba1 2021-02-10 op if (matches(loc->match, path))
174 6016a593 2021-01-30 op return loc->auto_index == 1;
178 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
179 b8e64ccd 2021-03-31 op return loc->auto_index == 1;
183 6abda252 2021-02-06 op vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
185 6abda252 2021-02-06 op struct location *loc;
187 6abda252 2021-02-06 op if (v == NULL || path == NULL)
190 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
191 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
192 cd761624 2021-02-06 op if (loc->block_code != 0) {
193 49b73ba1 2021-02-10 op if (matches(loc->match, path)) {
194 6abda252 2021-02-06 op *code = loc->block_code;
195 6abda252 2021-02-06 op *fmt = loc->block_fmt;
201 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
202 b8e64ccd 2021-03-31 op *code = loc->block_code;
203 b8e64ccd 2021-03-31 op *fmt = loc->block_fmt;
204 b8e64ccd 2021-03-31 op return loc->block_code != 0;
208 8ad1c570 2021-05-09 op vhost_fastcgi(struct vhost *v, const char *path)
210 8ad1c570 2021-05-09 op struct location *loc;
212 8ad1c570 2021-05-09 op if (v == NULL || path == NULL)
215 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
216 8ad1c570 2021-05-09 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
217 8ad1c570 2021-05-09 op if (loc->fcgi != -1)
218 8ad1c570 2021-05-09 op if (matches(loc->match, path))
219 8ad1c570 2021-05-09 op return loc->fcgi;
222 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
223 8ad1c570 2021-05-09 op return loc->fcgi;
227 1feaf2a6 2021-05-15 op vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
229 fdea6aa0 2021-04-30 op struct location *loc;
230 1feaf2a6 2021-05-15 op size_t l = 0;
232 fdea6aa0 2021-04-30 op if (v == NULL || path == NULL)
235 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
236 fdea6aa0 2021-04-30 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
238 fdea6aa0 2021-04-30 op if (loc->dirfd != -1)
239 1feaf2a6 2021-05-15 op if (matches(loc->match, path)) {
241 fdea6aa0 2021-04-30 op return loc->dirfd;
246 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
247 fdea6aa0 2021-04-30 op return loc->dirfd;
251 6abda252 2021-02-06 op vhost_strip(struct vhost *v, const char *path)
253 6abda252 2021-02-06 op struct location *loc;
255 6abda252 2021-02-06 op if (v == NULL || path == NULL)
258 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
259 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
260 cd761624 2021-02-06 op if (loc->strip != 0) {
261 49b73ba1 2021-02-10 op if (matches(loc->match, path))
262 6abda252 2021-02-06 op return loc->strip;
266 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
267 b8e64ccd 2021-03-31 op return loc->strip;
271 02be96c6 2021-02-09 op vhost_require_ca(struct vhost *v, const char *path)
273 02be96c6 2021-02-09 op struct location *loc;
275 02be96c6 2021-02-09 op if (v == NULL || path == NULL)
278 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
279 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
280 02be96c6 2021-02-09 op if (loc->reqca != NULL) {
281 49b73ba1 2021-02-10 op if (matches(loc->match, path))
282 02be96c6 2021-02-09 op return loc->reqca;
286 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
287 b8e64ccd 2021-03-31 op return loc->reqca;
291 793835cb 2021-02-23 op vhost_disable_log(struct vhost *v, const char *path)
293 793835cb 2021-02-23 op struct location *loc;
295 793835cb 2021-02-23 op if (v == NULL || path == NULL)
298 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
299 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
300 793835cb 2021-02-23 op if (loc->disable_log && matches(loc->match, path))
304 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
305 b8e64ccd 2021-03-31 op return loc->disable_log;
309 d3a08f4d 2021-01-17 op check_path(struct client *c, const char *path, int *fd)
311 d3a08f4d 2021-01-17 op struct stat sb;
312 d1ca3911 2021-01-21 op const char *p;
313 efb48052 2021-07-27 op int dirfd, strip;
315 d3a08f4d 2021-01-17 op assert(path != NULL);
318 fdea6aa0 2021-04-30 op * in send_dir we add an initial / (to be redirect-friendly),
319 fdea6aa0 2021-04-30 op * but here we want to skip it
321 fdea6aa0 2021-04-30 op if (*path == '/')
324 fdea6aa0 2021-04-30 op strip = vhost_strip(c->host, path);
325 fdea6aa0 2021-04-30 op p = strip_path(path, strip);
327 fdea6aa0 2021-04-30 op if (*p == '/')
329 fdea6aa0 2021-04-30 op if (*p == '\0')
332 1feaf2a6 2021-05-15 op dirfd = vhost_dirfd(c->host, path, &c->loc);
333 fdea6aa0 2021-04-30 op log_debug(c, "check_path: strip=%d path=%s original=%s",
334 fdea6aa0 2021-04-30 op strip, p, path);
335 efb48052 2021-07-27 op if (*fd == -1 && (*fd = openat(dirfd, p, O_RDONLY)) == -1)
336 d3a08f4d 2021-01-17 op return FILE_MISSING;
338 d3a08f4d 2021-01-17 op if (fstat(*fd, &sb) == -1) {
339 3abf91b0 2021-02-07 op log_notice(c, "failed stat for %s: %s", path, strerror(errno));
340 d3a08f4d 2021-01-17 op return FILE_MISSING;
343 d3a08f4d 2021-01-17 op if (S_ISDIR(sb.st_mode))
344 d3a08f4d 2021-01-17 op return FILE_DIRECTORY;
346 d3a08f4d 2021-01-17 op if (sb.st_mode & S_IXUSR)
347 d3a08f4d 2021-01-17 op return FILE_EXECUTABLE;
349 d3a08f4d 2021-01-17 op return FILE_EXISTS;
353 abc007d2 2021-02-08 op open_file(struct client *c)
355 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
356 d3a08f4d 2021-01-17 op case FILE_EXECUTABLE:
357 eecad7a3 2021-02-12 op if (c->host->cgi != NULL && matches(c->host->cgi, c->iri.path)) {
358 abc007d2 2021-02-08 op start_cgi(c->iri.path, "", c);
362 d3a08f4d 2021-01-17 op /* fallthrough */
364 d3a08f4d 2021-01-17 op case FILE_EXISTS:
365 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
366 27b2fa9a 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
369 d3a08f4d 2021-01-17 op case FILE_DIRECTORY:
373 d3a08f4d 2021-01-17 op case FILE_MISSING:
374 eecad7a3 2021-02-12 op if (c->host->cgi != NULL && matches(c->host->cgi, c->iri.path)) {
375 abc007d2 2021-02-08 op check_for_cgi(c);
378 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
382 d3a08f4d 2021-01-17 op /* unreachable */
388 d3a08f4d 2021-01-17 op * the inverse of this algorithm, i.e. starting from the start of the
389 d3a08f4d 2021-01-17 op * path + strlen(cgi), and checking if each component, should be
390 d3a08f4d 2021-01-17 op * faster. But it's tedious to write. This does the opposite: starts
391 d3a08f4d 2021-01-17 op * from the end and strip one component at a time, until either an
392 d3a08f4d 2021-01-17 op * executable is found or we emptied the path.
395 abc007d2 2021-02-08 op check_for_cgi(struct client *c)
397 2fafa2d2 2021-02-01 op char path[PATH_MAX];
400 2fafa2d2 2021-02-01 op strlcpy(path, c->iri.path, sizeof(path));
401 d3a08f4d 2021-01-17 op end = strchr(path, '\0');
403 d3a08f4d 2021-01-17 op while (end > path) {
405 571d20fb 2021-05-15 op * go up one level. UNIX paths are simple and POSIX
406 571d20fb 2021-05-15 op * dirname, with its ambiguities on if the given
407 571d20fb 2021-05-15 op * pointer is changed or not, gives me headaches.
409 3571854e 2021-09-24 op while (*end != '/' && end > path)
412 3571854e 2021-09-24 op if (end == path)
417 abc007d2 2021-02-08 op switch (check_path(c, path, &c->pfd)) {
418 d3a08f4d 2021-01-17 op case FILE_EXECUTABLE:
419 abc007d2 2021-02-08 op start_cgi(path, end+1, c);
421 d3a08f4d 2021-01-17 op case FILE_MISSING:
432 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
437 9b8f5ed2 2021-02-03 op mark_nonblock(int fd)
441 9b8f5ed2 2021-02-03 op if ((flags = fcntl(fd, F_GETFL)) == -1)
442 9b8f5ed2 2021-02-03 op fatal("fcntl(F_GETFL): %s", strerror(errno));
443 9b8f5ed2 2021-02-03 op if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
444 9b8f5ed2 2021-02-03 op fatal("fcntl(F_SETFL): %s", strerror(errno));
448 abc007d2 2021-02-08 op handle_handshake(int fd, short ev, void *d)
450 abc007d2 2021-02-08 op struct client *c = d;
451 d3a08f4d 2021-01-17 op struct vhost *h;
452 cc8c2901 2021-04-29 op struct alist *a;
453 d3a08f4d 2021-01-17 op const char *servname;
454 a8d4a897 2021-01-29 op const char *parse_err = "unknown error";
456 d3a08f4d 2021-01-17 op switch (tls_handshake(c->ctx)) {
457 d3a08f4d 2021-01-17 op case 0: /* success */
458 d3a08f4d 2021-01-17 op case -1: /* already handshaked */
460 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
461 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, handle_handshake, c, NULL);
463 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
464 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
467 d3a08f4d 2021-01-17 op /* unreachable */
471 80444938 2021-10-15 op c->bev = bufferevent_new(fd, client_read, client_write,
472 80444938 2021-10-15 op client_error, c);
473 80444938 2021-10-15 op if (c->bev == NULL)
474 80444938 2021-10-15 op fatal("%s: failed to allocate client buffer: %s",
475 80444938 2021-10-15 op __func__, strerror(errno));
477 80444938 2021-10-15 op event_set(&c->bev->ev_read, c->fd, EV_READ,
478 80444938 2021-10-15 op client_tls_readcb, c->bev);
479 80444938 2021-10-15 op event_set(&c->bev->ev_write, c->fd, EV_WRITE,
480 80444938 2021-10-15 op client_tls_writecb, c->bev);
482 80444938 2021-10-15 op #if HAVE_LIBEVENT2
483 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->input, 0);
484 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->output, 1);
487 79288c8b 2021-09-24 op if ((servname = tls_conn_servername(c->ctx)) == NULL) {
488 79288c8b 2021-09-24 op log_debug(c, "handshake: missing SNI");
492 a8d4a897 2021-01-29 op if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
493 3abf91b0 2021-02-07 op log_info(c, "puny_decode: %s", parse_err);
497 b8e64ccd 2021-03-31 op TAILQ_FOREACH(h, &hosts, vhosts) {
498 eecad7a3 2021-02-12 op if (matches(h->domain, c->domain))
500 cc8c2901 2021-04-29 op TAILQ_FOREACH(a, &h->aliases, aliases) {
501 cc8c2901 2021-04-29 op if (matches(a->alias, c->domain))
507 3abf91b0 2021-02-07 op log_debug(c, "handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
508 3abf91b0 2021-02-07 op servname != NULL ? servname : "(null)",
510 b8e64ccd 2021-03-31 op h != NULL ? h->domain : "(null)");
512 b8e64ccd 2021-03-31 op if (h != NULL) {
514 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EV_READ);
519 abc007d2 2021-02-08 op start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
522 91b9f2a8 2021-05-15 op static const char *
523 91b9f2a8 2021-05-15 op strip_path(const char *path, int strip)
527 6abda252 2021-02-06 op while (strip > 0) {
528 6abda252 2021-02-06 op if ((t = strchr(path, '/')) == NULL) {
529 6abda252 2021-02-06 op path = strchr(path, '\0');
540 57ec3e77 2021-02-08 op fmt_sbuf(const char *fmt, struct client *c, const char *path)
543 57ec3e77 2021-02-08 op char buf[32];
545 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
546 6abda252 2021-02-06 op for (i = 0; *fmt; ++fmt) {
547 6abda252 2021-02-06 op if (i == sizeof(buf)-1 || *fmt == '%') {
548 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
549 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
553 6abda252 2021-02-06 op if (*fmt != '%') {
554 6abda252 2021-02-06 op buf[i++] = *fmt;
558 6abda252 2021-02-06 op switch (*++fmt) {
560 6abda252 2021-02-06 op strlcat(c->sbuf, "%", sizeof(c->sbuf));
563 737a6b50 2021-04-30 op if (*path != '/')
564 737a6b50 2021-04-30 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
565 6abda252 2021-02-06 op strlcat(c->sbuf, path, sizeof(c->sbuf));
568 6abda252 2021-02-06 op strlcat(c->sbuf, c->iri.query, sizeof(c->sbuf));
571 6abda252 2021-02-06 op snprintf(buf, sizeof(buf), "%d", conf.port);
572 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
573 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
576 6abda252 2021-02-06 op strlcat(c->sbuf, c->domain, sizeof(c->sbuf));
579 6abda252 2021-02-06 op fatal("%s: unknown fmt specifier %c",
580 6abda252 2021-02-06 op __func__, *fmt);
585 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
588 57ec3e77 2021-02-08 op /* 1 if a matching `block return' (and apply it), 0 otherwise */
590 57ec3e77 2021-02-08 op apply_block_return(struct client *c)
592 57ec3e77 2021-02-08 op const char *fmt, *path;
595 57ec3e77 2021-02-08 op if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
598 57ec3e77 2021-02-08 op path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
599 57ec3e77 2021-02-08 op fmt_sbuf(fmt, c, path);
601 abc007d2 2021-02-08 op start_reply(c, code, c->sbuf);
605 8ad1c570 2021-05-09 op /* 1 if matching `fcgi' (and apply it), 0 otherwise */
607 8ad1c570 2021-05-09 op apply_fastcgi(struct client *c)
610 8ad1c570 2021-05-09 op struct fcgi *f;
612 8ad1c570 2021-05-09 op if ((id = vhost_fastcgi(c->host, c->iri.path)) == -1)
615 4cd25209 2021-10-07 op f = &fcgi[id];
617 4cd25209 2021-10-07 op log_debug(c, "opening fastcgi connection for (%s,%s,%s)",
618 4cd25209 2021-10-07 op f->path, f->port, f->prog);
620 4cd25209 2021-10-07 op imsg_compose(&exibuf, IMSG_FCGI_REQ, c->id, 0, -1,
621 4cd25209 2021-10-07 op &id, sizeof(id));
622 4cd25209 2021-10-07 op imsg_flush(&exibuf);
626 02be96c6 2021-02-09 op /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
628 02be96c6 2021-02-09 op apply_require_ca(struct client *c)
630 02be96c6 2021-02-09 op X509_STORE *store;
631 02be96c6 2021-02-09 op const uint8_t *cert;
634 02be96c6 2021-02-09 op if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
637 02be96c6 2021-02-09 op if (!tls_peer_cert_provided(c->ctx)) {
638 02be96c6 2021-02-09 op start_reply(c, CLIENT_CERT_REQ, "client certificate required");
642 02be96c6 2021-02-09 op cert = tls_peer_cert_chain_pem(c->ctx, &len);
643 02be96c6 2021-02-09 op if (!validate_against_ca(store, cert, len)) {
644 02be96c6 2021-02-09 op start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
651 b8e64ccd 2021-03-31 op static size_t
652 b8e64ccd 2021-03-31 op host_nth(struct vhost *h)
654 b8e64ccd 2021-03-31 op struct vhost *v;
655 b8e64ccd 2021-03-31 op size_t i = 0;
657 b8e64ccd 2021-03-31 op TAILQ_FOREACH(v, &hosts, vhosts) {
667 abc007d2 2021-02-08 op start_cgi(const char *spath, const char *relpath, struct client *c)
669 d3a08f4d 2021-01-17 op char addr[NI_MAXHOST];
670 bc99d868 2021-03-19 op const char *t;
671 bc99d868 2021-03-19 op struct cgireq req;
674 efe7d180 2021-10-02 op c->type = REQUEST_CGI;
676 d3a08f4d 2021-01-17 op e = getnameinfo((struct sockaddr*)&c->addr, sizeof(c->addr),
677 d3a08f4d 2021-01-17 op addr, sizeof(addr),
679 d3a08f4d 2021-01-17 op NI_NUMERICHOST);
681 bc99d868 2021-03-19 op fatal("getnameinfo failed");
683 bc99d868 2021-03-19 op memset(&req, 0, sizeof(req));
685 bc99d868 2021-03-19 op memcpy(req.buf, c->req, sizeof(req.buf));
687 bc99d868 2021-03-19 op req.iri_schema_off = c->iri.schema - c->req;
688 bc99d868 2021-03-19 op req.iri_host_off = c->iri.host - c->req;
689 bc99d868 2021-03-19 op req.iri_port_off = c->iri.port - c->req;
690 bc99d868 2021-03-19 op req.iri_path_off = c->iri.path - c->req;
691 bc99d868 2021-03-19 op req.iri_query_off = c->iri.query - c->req;
692 bc99d868 2021-03-19 op req.iri_fragment_off = c->iri.fragment - c->req;
694 bc99d868 2021-03-19 op req.iri_portno = c->iri.port_no;
696 bc99d868 2021-03-19 op strlcpy(req.spath, spath, sizeof(req.spath));
697 bc99d868 2021-03-19 op strlcpy(req.relpath, relpath, sizeof(req.relpath));
698 bc99d868 2021-03-19 op strlcpy(req.addr, addr, sizeof(req.addr));
700 bc99d868 2021-03-19 op if ((t = tls_peer_cert_subject(c->ctx)) != NULL)
701 bc99d868 2021-03-19 op strlcpy(req.subject, t, sizeof(req.subject));
702 bc99d868 2021-03-19 op if ((t = tls_peer_cert_issuer(c->ctx)) != NULL)
703 bc99d868 2021-03-19 op strlcpy(req.issuer, t, sizeof(req.issuer));
704 bc99d868 2021-03-19 op if ((t = tls_peer_cert_hash(c->ctx)) != NULL)
705 bc99d868 2021-03-19 op strlcpy(req.hash, t, sizeof(req.hash));
706 89541eee 2021-04-13 op if ((t = tls_conn_version(c->ctx)) != NULL)
707 89541eee 2021-04-13 op strlcpy(req.version, t, sizeof(req.version));
708 89541eee 2021-04-13 op if ((t = tls_conn_cipher(c->ctx)) != NULL)
709 89541eee 2021-04-13 op strlcpy(req.cipher, t, sizeof(req.cipher));
711 89541eee 2021-04-13 op req.cipher_strength = tls_conn_cipher_strength(c->ctx);
712 bc99d868 2021-03-19 op req.notbefore = tls_peer_cert_notbefore(c->ctx);
713 bc99d868 2021-03-19 op req.notafter = tls_peer_cert_notafter(c->ctx);
715 b8e64ccd 2021-03-31 op req.host_off = host_nth(c->host);
716 1feaf2a6 2021-05-15 op req.loc_off = c->loc;
718 bc99d868 2021-03-19 op imsg_compose(&exibuf, IMSG_CGI_REQ, c->id, 0, -1, &req, sizeof(req));
719 bc99d868 2021-03-19 op imsg_flush(&exibuf);
721 bc99d868 2021-03-19 op close(c->pfd);
725 abc007d2 2021-02-08 op open_dir(struct client *c)
728 11c98667 2021-04-25 op int dirfd, root;
729 252908e6 2021-01-24 op char *before_file;
731 11c98667 2021-04-25 op root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
733 0be51733 2021-01-20 op len = strlen(c->iri.path);
734 252908e6 2021-01-24 op if (len > 0 && !ends_with(c->iri.path, "/")) {
735 abc007d2 2021-02-08 op redirect_canonical_dir(c);
739 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
740 d1ca3911 2021-01-21 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
741 d1ca3911 2021-01-21 op if (!ends_with(c->sbuf, "/"))
742 0be51733 2021-01-20 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
743 252908e6 2021-01-24 op before_file = strchr(c->sbuf, '\0');
744 c8b74339 2021-01-24 op len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
745 c8b74339 2021-01-24 op sizeof(c->sbuf));
746 252908e6 2021-01-24 op if (len >= sizeof(c->sbuf)) {
747 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
751 252908e6 2021-01-24 op c->iri.path = c->sbuf;
753 252908e6 2021-01-24 op /* close later unless we have to generate the dir listing */
754 abc007d2 2021-02-08 op dirfd = c->pfd;
757 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
758 252908e6 2021-01-24 op case FILE_EXECUTABLE:
759 eecad7a3 2021-02-12 op if (c->host->cgi != NULL && matches(c->host->cgi, c->iri.path)) {
760 abc007d2 2021-02-08 op start_cgi(c->iri.path, "", c);
764 252908e6 2021-01-24 op /* fallthrough */
766 252908e6 2021-01-24 op case FILE_EXISTS:
767 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
768 98ee8406 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
771 252908e6 2021-01-24 op case FILE_DIRECTORY:
772 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
775 252908e6 2021-01-24 op case FILE_MISSING:
776 252908e6 2021-01-24 op *before_file = '\0';
778 252908e6 2021-01-24 op if (!vhost_auto_index(c->host, c->iri.path)) {
779 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
783 efe7d180 2021-10-02 op c->type = REQUEST_DIR;
785 e76f2c74 2021-04-25 op c->dirlen = scandir_fd(dirfd, &c->dir,
786 11c98667 2021-04-25 op root ? select_non_dotdot : select_non_dot,
788 11c98667 2021-04-25 op if (c->dirlen == -1) {
789 11c98667 2021-04-25 op log_err(c, "scandir_fd(%d) (vhost:%s) %s: %s",
790 abc007d2 2021-02-08 op c->pfd, c->host->domain, c->iri.path, strerror(errno));
791 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
794 11c98667 2021-04-25 op c->diroff = 0;
797 abc007d2 2021-02-08 op start_reply(c, SUCCESS, "text/gemini");
798 efe7d180 2021-10-02 op evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
799 efe7d180 2021-10-02 op "# Index of %s\n\n", c->iri.path);
803 252908e6 2021-01-24 op /* unreachable */
807 252908e6 2021-01-24 op close(dirfd);
811 abc007d2 2021-02-08 op redirect_canonical_dir(struct client *c)
815 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
816 252908e6 2021-01-24 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
817 252908e6 2021-01-24 op len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
819 0be51733 2021-01-20 op if (len >= sizeof(c->sbuf)) {
820 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
824 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
828 efe7d180 2021-10-02 op client_tls_readcb(int fd, short event, void *d)
830 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
831 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
834 efe7d180 2021-10-02 op int what = EVBUFFER_READ;
835 efe7d180 2021-10-02 op int howmuch = IBUF_READ_SIZE;
836 efe7d180 2021-10-02 op char buf[IBUF_READ_SIZE];
838 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
839 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
843 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0)
844 efe7d180 2021-10-02 op howmuch = MIN(sizeof(buf), bufev->wm_read.high);
846 efe7d180 2021-10-02 op switch (ret = tls_read(client->ctx, buf, howmuch)) {
847 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
848 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
851 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
856 efe7d180 2021-10-02 op if (len == 0) {
857 efe7d180 2021-10-02 op what |= EVBUFFER_EOF;
861 efe7d180 2021-10-02 op if (evbuffer_add(bufev->input, buf, len) == -1) {
862 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
866 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
867 efe7d180 2021-10-02 op if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
869 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
871 efe7d180 2021-10-02 op * here we could implement a read pressure policy.
875 efe7d180 2021-10-02 op if (bufev->readcb != NULL)
876 efe7d180 2021-10-02 op (*bufev->readcb)(bufev, bufev->cbarg);
881 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
885 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
889 efe7d180 2021-10-02 op client_tls_writecb(int fd, short event, void *d)
891 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
892 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
895 efe7d180 2021-10-02 op short what = EVBUFFER_WRITE;
897 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
898 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
902 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0) {
903 efe7d180 2021-10-02 op ret = tls_write(client->ctx,
904 efe7d180 2021-10-02 op EVBUFFER_DATA(bufev->output),
905 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output));
906 efe7d180 2021-10-02 op switch (ret) {
907 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
908 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
911 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
915 efe7d180 2021-10-02 op evbuffer_drain(bufev->output, len);
918 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0)
919 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
921 efe7d180 2021-10-02 op if (bufev->writecb != NULL &&
922 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
923 efe7d180 2021-10-02 op (*bufev->writecb)(bufev, bufev->cbarg);
927 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
930 efe7d180 2021-10-02 op log_err(client, "tls error: %s", tls_error(client->ctx));
931 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
935 efe7d180 2021-10-02 op client_read(struct bufferevent *bev, void *d)
937 efe7d180 2021-10-02 op struct client *c = d;
938 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
939 efe7d180 2021-10-02 op const char *parse_err = "invalid request";
940 efe7d180 2021-10-02 op char decoded[DOMAIN_NAME_LEN];
943 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ);
945 efe7d180 2021-10-02 op /* max url len + \r\n */
946 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(src) > 1024 + 2) {
947 efe7d180 2021-10-02 op log_err(c, "too much data received");
948 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "bad request");
952 efe7d180 2021-10-02 op c->req = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
953 efe7d180 2021-10-02 op if (c->req == NULL) {
954 efe7d180 2021-10-02 op /* not enough data yet. */
955 efe7d180 2021-10-02 op bufferevent_enable(bev, EVBUFFER_READ);
959 efe7d180 2021-10-02 op if (!parse_iri(c->req, &c->iri, &parse_err) ||
960 efe7d180 2021-10-02 op !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
961 efe7d180 2021-10-02 op log_err(c, "IRI parse error: %s", parse_err);
962 807a80cb 2021-10-06 op start_reply(c, BAD_REQUEST, "bad request");
966 efe7d180 2021-10-02 op if (c->iri.port_no != conf.port ||
967 efe7d180 2021-10-02 op strcmp(c->iri.schema, "gemini") ||
968 efe7d180 2021-10-02 op strcmp(decoded, c->domain)) {
969 efe7d180 2021-10-02 op start_reply(c, PROXY_REFUSED, "won't proxy request");
973 efe7d180 2021-10-02 op if (apply_require_ca(c) ||
974 efe7d180 2021-10-02 op apply_block_return(c)||
975 efe7d180 2021-10-02 op apply_fastcgi(c))
978 efe7d180 2021-10-02 op if (c->host->entrypoint != NULL) {
980 efe7d180 2021-10-02 op start_cgi(c->host->entrypoint, c->iri.path, c);
984 efe7d180 2021-10-02 op open_file(c);
988 efe7d180 2021-10-02 op client_write(struct bufferevent *bev, void *d)
990 efe7d180 2021-10-02 op struct client *c = d;
991 efe7d180 2021-10-02 op struct evbuffer *out = EVBUFFER_OUTPUT(bev);
992 efe7d180 2021-10-02 op char buf[BUFSIZ];
995 efe7d180 2021-10-02 op switch (c->type) {
996 efe7d180 2021-10-02 op case REQUEST_UNDECIDED:
998 efe7d180 2021-10-02 op * Ignore spurious calls when we still don't have idea
999 efe7d180 2021-10-02 op * what to do with the request.
1003 efe7d180 2021-10-02 op case REQUEST_FILE:
1004 efe7d180 2021-10-02 op if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1005 efe7d180 2021-10-02 op log_warn(c, "read: %s", strerror(errno));
1006 efe7d180 2021-10-02 op client_error(bev, EVBUFFER_ERROR, c);
1008 efe7d180 2021-10-02 op } else if (r == 0) {
1009 efe7d180 2021-10-02 op client_close(c);
1011 efe7d180 2021-10-02 op } else if (r != sizeof(buf))
1012 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1013 efe7d180 2021-10-02 op bufferevent_write(bev, buf, r);
1016 efe7d180 2021-10-02 op case REQUEST_DIR:
1017 efe7d180 2021-10-02 op /* TODO: handle big big directories better */
1018 efe7d180 2021-10-02 op for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1019 efe7d180 2021-10-02 op evbuffer_add_printf(out, "=> %s\n",
1020 efe7d180 2021-10-02 op c->dir[c->diroff]->d_name);
1021 efe7d180 2021-10-02 op free(c->dir[c->diroff]);
1023 efe7d180 2021-10-02 op free(c->dir);
1024 efe7d180 2021-10-02 op c->dir = NULL;
1026 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1028 efe7d180 2021-10-02 op event_add(&c->bev->ev_write, NULL);
1031 efe7d180 2021-10-02 op case REQUEST_CGI:
1032 efe7d180 2021-10-02 op case REQUEST_FCGI:
1034 efe7d180 2021-10-02 op * Here we depend on on the cgi script or fastcgi
1035 efe7d180 2021-10-02 op * connection to provide data.
1039 efe7d180 2021-10-02 op case REQUEST_DONE:
1040 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(out) == 0)
1041 efe7d180 2021-10-02 op client_close(c);
1047 efe7d180 2021-10-02 op client_error(struct bufferevent *bev, short error, void *d)
1049 efe7d180 2021-10-02 op struct client *c = d;
1051 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1053 efe7d180 2021-10-02 op if (error & EVBUFFER_TIMEOUT) {
1054 efe7d180 2021-10-02 op log_warn(c, "timeout reached, "
1055 efe7d180 2021-10-02 op "forcefully closing the connection");
1056 efe7d180 2021-10-02 op if (c->code == 0)
1057 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "timeout");
1059 efe7d180 2021-10-02 op client_close(c);
1063 efe7d180 2021-10-02 op if (error & EVBUFFER_EOF) {
1064 efe7d180 2021-10-02 op client_close(c);
1068 efe7d180 2021-10-02 op log_err(c, "unknown bufferevent error: %s", strerror(errno));
1069 efe7d180 2021-10-02 op client_close(c);
1073 efe7d180 2021-10-02 op start_reply(struct client *c, int code, const char *meta)
1075 efe7d180 2021-10-02 op struct evbuffer *evb = EVBUFFER_OUTPUT(c->bev);
1076 efe7d180 2021-10-02 op const char *lang;
1079 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EVBUFFER_WRITE);
1081 efe7d180 2021-10-02 op c->code = code;
1082 efe7d180 2021-10-02 op c->meta = meta;
1084 efe7d180 2021-10-02 op r = evbuffer_add_printf(evb, "%d %s", code, meta);
1085 efe7d180 2021-10-02 op if (r == -1)
1088 efe7d180 2021-10-02 op /* 2 digit status + space + 1024 max reply */
1089 efe7d180 2021-10-02 op if (r > 1027)
1090 efe7d180 2021-10-02 op goto overflow;
1092 efe7d180 2021-10-02 op if (c->type != REQUEST_CGI &&
1093 efe7d180 2021-10-02 op c->type != REQUEST_FCGI &&
1094 efe7d180 2021-10-02 op !strcmp(meta, "text/gemini") &&
1095 efe7d180 2021-10-02 op (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1096 efe7d180 2021-10-02 op rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1097 efe7d180 2021-10-02 op if (rr == -1)
1099 efe7d180 2021-10-02 op if (r + rr > 1027)
1100 efe7d180 2021-10-02 op goto overflow;
1103 efe7d180 2021-10-02 op bufferevent_write(c->bev, "\r\n", 2);
1105 efe7d180 2021-10-02 op if (!vhost_disable_log(c->host, c->iri.path))
1106 efe7d180 2021-10-02 op log_request(c, EVBUFFER_DATA(evb), EVBUFFER_LENGTH(evb));
1108 efe7d180 2021-10-02 op if (code != 20 && IS_INTERNAL_REQUEST(c->type))
1109 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1114 efe7d180 2021-10-02 op log_err(c, "evbuffer_add_printf error: no memory");
1115 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1116 efe7d180 2021-10-02 op client_close(c);
1120 efe7d180 2021-10-02 op log_warn(c, "reply header overflow");
1121 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1122 efe7d180 2021-10-02 op start_reply(c, TEMP_FAILURE, "internal error");
1126 efe7d180 2021-10-02 op client_close_ev(int fd, short event, void *d)
1128 8ad1c570 2021-05-09 op struct client *c = d;
1130 d3a08f4d 2021-01-17 op switch (tls_close(c->ctx)) {
1131 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
1132 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1134 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
1135 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1139 d3a08f4d 2021-01-17 op connected_clients--;
1141 e4daebe4 2021-10-06 op free(c->req);
1143 d3a08f4d 2021-01-17 op tls_free(c->ctx);
1144 d3a08f4d 2021-01-17 op c->ctx = NULL;
1146 efe7d180 2021-10-02 op free(c->header);
1148 abc007d2 2021-02-08 op if (c->pfd != -1)
1149 abc007d2 2021-02-08 op close(c->pfd);
1151 252908e6 2021-01-24 op if (c->dir != NULL)
1152 11c98667 2021-04-25 op free(c->dir);
1154 abc007d2 2021-02-08 op close(c->fd);
1159 efe7d180 2021-10-02 op client_close(struct client *c)
1162 efe7d180 2021-10-02 op * We may end up calling client_close in various situations
1163 efe7d180 2021-10-02 op * and for the most unexpected reasons. Therefore, we need to
1164 efe7d180 2021-10-02 op * ensure that everything is properly released once we reach
1165 efe7d180 2021-10-02 op * this point.
1168 207b3e80 2021-10-07 op SPLAY_REMOVE(client_tree_id, &clients, c);
1170 efe7d180 2021-10-02 op if (c->cgibev != NULL) {
1171 efe7d180 2021-10-02 op bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1172 efe7d180 2021-10-02 op bufferevent_free(c->cgibev);
1173 efe7d180 2021-10-02 op c->cgibev = NULL;
1174 efe7d180 2021-10-02 op close(c->pfd);
1175 efe7d180 2021-10-02 op c->pfd = -1;
1178 efe7d180 2021-10-02 op bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1179 efe7d180 2021-10-02 op bufferevent_free(c->bev);
1180 efe7d180 2021-10-02 op c->bev = NULL;
1182 efe7d180 2021-10-02 op client_close_ev(c->fd, 0, c);
1186 efe7d180 2021-10-02 op cgi_read(struct bufferevent *bev, void *d)
1188 efe7d180 2021-10-02 op struct client *client = d;
1189 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
1190 efe7d180 2021-10-02 op char *header;
1194 efe7d180 2021-10-02 op /* intercept the header */
1195 efe7d180 2021-10-02 op if (client->code == 0) {
1196 efe7d180 2021-10-02 op header = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
1197 efe7d180 2021-10-02 op if (header == NULL) {
1198 efe7d180 2021-10-02 op /* max reply + \r\n */
1199 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(src) > 1026) {
1200 efe7d180 2021-10-02 op log_warn(client, "CGI script is trying to "
1201 efe7d180 2021-10-02 op "send a header too long.");
1202 efe7d180 2021-10-02 op cgi_error(bev, EVBUFFER_READ, client);
1205 efe7d180 2021-10-02 op /* wait a bit */
1209 efe7d180 2021-10-02 op if (len < 3 || len > 1029 ||
1210 efe7d180 2021-10-02 op !isdigit(header[0]) ||
1211 efe7d180 2021-10-02 op !isdigit(header[1]) ||
1212 efe7d180 2021-10-02 op !isspace(header[2])) {
1213 efe7d180 2021-10-02 op free(header);
1214 efe7d180 2021-10-02 op log_warn(client, "CGI script is trying to send a "
1215 efe7d180 2021-10-02 op "malformed header");
1216 efe7d180 2021-10-02 op cgi_error(bev, EVBUFFER_READ, client);
1220 efe7d180 2021-10-02 op client->header = header;
1221 efe7d180 2021-10-02 op code = (header[0] - '0') * 10 + (header[1] - '0');
1223 efe7d180 2021-10-02 op if (code < 10 || code >= 70) {
1224 efe7d180 2021-10-02 op log_warn(client, "CGI script is trying to send an "
1225 efe7d180 2021-10-02 op "invalid reply code (%d)", code);
1226 efe7d180 2021-10-02 op cgi_error(bev, EVBUFFER_READ, client);
1230 efe7d180 2021-10-02 op start_reply(client, code, header + 3);
1232 efe7d180 2021-10-02 op if (client->code < 20 || client->code > 29) {
1233 efe7d180 2021-10-02 op cgi_error(client->cgibev, EVBUFFER_EOF, client);
1238 efe7d180 2021-10-02 op bufferevent_write_buffer(client->bev, src);
1242 efe7d180 2021-10-02 op cgi_write(struct bufferevent *bev, void *d)
1245 efe7d180 2021-10-02 op * Never called. We don't send data to a CGI script.
1251 efe7d180 2021-10-02 op cgi_error(struct bufferevent *bev, short error, void *d)
1253 efe7d180 2021-10-02 op struct client *client = d;
1255 efe7d180 2021-10-02 op if (error & EVBUFFER_ERROR)
1256 efe7d180 2021-10-02 op log_err(client, "%s: evbuffer error (%x): %s",
1257 efe7d180 2021-10-02 op __func__, error, strerror(errno));
1259 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ|EVBUFFER_WRITE);
1260 efe7d180 2021-10-02 op bufferevent_free(bev);
1261 efe7d180 2021-10-02 op client->cgibev = NULL;
1263 efe7d180 2021-10-02 op close(client->pfd);
1264 efe7d180 2021-10-02 op client->pfd = -1;
1266 efe7d180 2021-10-02 op client->type = REQUEST_DONE;
1267 efe7d180 2021-10-02 op if (client->code != 0)
1268 efe7d180 2021-10-02 op client_write(client->bev, client);
1270 efe7d180 2021-10-02 op start_reply(client, CGI_ERROR, "CGI error");
1274 abc007d2 2021-02-08 op do_accept(int sock, short et, void *d)
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;
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)
1288 d3a08f4d 2021-01-17 op fatal("accept: %s", strerror(errno));
1291 3cb3dd4d 2021-02-12 op mark_nonblock(fd);
1293 207b3e80 2021-10-07 op c = xcalloc(1, sizeof(*c));
1294 207b3e80 2021-10-07 op c->id = ++server_client_id;
1296 207b3e80 2021-10-07 op c->pfd = -1;
1297 207b3e80 2021-10-07 op c->addr = addr;
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);
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++;
1311 8ad1c570 2021-05-09 op static struct client *
1312 bc99d868 2021-03-19 op client_by_id(int id)
1314 207b3e80 2021-10-07 op struct client *c;
1316 207b3e80 2021-10-07 op if ((c = try_client_by_id(id)) == NULL)
1317 bc99d868 2021-03-19 op fatal("in client_by_id: invalid id %d", id);
1321 8ad1c570 2021-05-09 op struct client *
1322 8ad1c570 2021-05-09 op try_client_by_id(int id)
1324 207b3e80 2021-10-07 op struct client find;
1326 207b3e80 2021-10-07 op find.id = id;
1327 207b3e80 2021-10-07 op return SPLAY_FIND(client_tree_id, &clients, &find);
1331 bc99d868 2021-03-19 op handle_imsg_cgi_res(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1333 bc99d868 2021-03-19 op struct client *c;
1335 bc99d868 2021-03-19 op c = client_by_id(imsg->hdr.peerid);
1337 efe7d180 2021-10-02 op if ((c->pfd = imsg->fd) == -1) {
1338 bc99d868 2021-03-19 op start_reply(c, TEMP_FAILURE, "internal server error");
1342 efe7d180 2021-10-02 op c->type = REQUEST_CGI;
1344 efe7d180 2021-10-02 op c->cgibev = bufferevent_new(c->pfd, cgi_read, cgi_write,
1345 efe7d180 2021-10-02 op cgi_error, c);
1347 efe7d180 2021-10-02 op bufferevent_enable(c->cgibev, EV_READ);
1351 8ad1c570 2021-05-09 op handle_imsg_fcgi_fd(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1353 8ad1c570 2021-05-09 op struct client *c;
1356 8ad1c570 2021-05-09 op id = imsg->hdr.peerid;
1358 4cd25209 2021-10-07 op if ((c = try_client_by_id(id)) == NULL) {
1359 4cd25209 2021-10-07 op if (imsg->fd != -1)
1360 4cd25209 2021-10-07 op close(imsg->fd);
1364 4cd25209 2021-10-07 op if ((c->pfd = imsg->fd) == -1) {
1365 4cd25209 2021-10-07 op start_reply(c, CGI_ERROR, "CGI error");
1369 4cd25209 2021-10-07 op mark_nonblock(c->pfd);
1371 4cd25209 2021-10-07 op c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
1372 4cd25209 2021-10-07 op fcgi_error, c);
1373 4cd25209 2021-10-07 op if (c->cgibev == NULL) {
1374 4cd25209 2021-10-07 op start_reply(c, TEMP_FAILURE, "internal server error");
1378 4cd25209 2021-10-07 op bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
1379 4cd25209 2021-10-07 op fcgi_req(c);
1383 bc99d868 2021-03-19 op handle_imsg_quit(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1386 a8a1f439 2021-07-07 op * don't call event_loopbreak since we want to finish to
1387 a8a1f439 2021-07-07 op * handle the ongoing connections.
1390 090b8a89 2021-07-06 op shutting_down = 1;
1392 a6e689d7 2021-02-12 op event_del(&e4);
1393 a6e689d7 2021-02-12 op if (has_ipv6)
1394 a6e689d7 2021-02-12 op event_del(&e6);
1395 a6e689d7 2021-02-12 op if (has_siginfo)
1396 a6e689d7 2021-02-12 op signal_del(&siginfo);
1397 bc99d868 2021-03-19 op event_del(&imsgev);
1398 a6e689d7 2021-02-12 op signal_del(&sigusr2);
1402 bc99d868 2021-03-19 op handle_dispatch_imsg(int fd, short ev, void *d)
1404 bc99d868 2021-03-19 op struct imsgbuf *ibuf = d;
1405 bc99d868 2021-03-19 op dispatch_imsg(ibuf, handlers, sizeof(handlers));
1409 abc007d2 2021-02-08 op handle_siginfo(int fd, short ev, void *d)
1411 abc007d2 2021-02-08 op log_info(NULL, "%d connected clients", connected_clients);
1415 bc99d868 2021-03-19 op loop(struct tls *ctx_, int sock4, int sock6, struct imsgbuf *ibuf)
1419 207b3e80 2021-10-07 op SPLAY_INIT(&clients);
1421 abc007d2 2021-02-08 op event_init();
1423 bc99d868 2021-03-19 op event_set(&e4, sock4, EV_READ | EV_PERSIST, &do_accept, NULL);
1424 a6e689d7 2021-02-12 op event_add(&e4, NULL);
1426 abc007d2 2021-02-08 op if (sock6 != -1) {
1427 a6e689d7 2021-02-12 op has_ipv6 = 1;
1428 bc99d868 2021-03-19 op event_set(&e6, sock6, EV_READ | EV_PERSIST, &do_accept, NULL);
1429 a6e689d7 2021-02-12 op event_add(&e6, NULL);
1432 bc99d868 2021-03-19 op event_set(&imsgev, ibuf->fd, EV_READ | EV_PERSIST, handle_dispatch_imsg, ibuf);
1433 bc99d868 2021-03-19 op event_add(&imsgev, NULL);
1435 abc007d2 2021-02-08 op #ifdef SIGINFO
1436 a6e689d7 2021-02-12 op has_siginfo = 1;
1437 a6e689d7 2021-02-12 op signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1438 a6e689d7 2021-02-12 op signal_add(&siginfo, NULL);
1440 5e3285d5 2021-02-12 op signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1441 a6e689d7 2021-02-12 op signal_add(&sigusr2, NULL);
1443 62e001b0 2021-03-20 op sandbox_server_process();
1444 abc007d2 2021-02-08 op event_dispatch();
1449 207b3e80 2021-10-07 op client_tree_cmp(struct client *a, struct client *b)
1451 207b3e80 2021-10-07 op if (a->id == b->id)
1453 207b3e80 2021-10-07 op else if (a->id < b->id)
1459 207b3e80 2021-10-07 op SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)
