2 eac9287d 2023-06-24 op * Copyright (c) 2021, 2022, 2023 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>
20 d29a2ee2 2022-09-06 op #include <sys/un.h>
22 d3a08f4d 2021-01-17 op #include <assert.h>
23 efe7d180 2021-10-02 op #include <ctype.h>
24 d3a08f4d 2021-01-17 op #include <errno.h>
25 abc007d2 2021-02-08 op #include <event.h>
26 d3a08f4d 2021-01-17 op #include <fcntl.h>
27 b4d409cf 2021-01-21 op #include <fnmatch.h>
28 2fafa2d2 2021-02-01 op #include <limits.h>
29 d3a08f4d 2021-01-17 op #include <string.h>
31 eae52ad4 2023-06-06 op #include "log.h"
32 c26f2460 2023-06-08 op #include "proc.h"
34 efe7d180 2021-10-02 op #define MIN(a, b) ((a) < (b) ? (a) : (b))
36 c26f2460 2023-06-08 op #ifndef nitems
37 c26f2460 2023-06-08 op #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
40 237095fd 2023-06-11 op #ifdef SIGINFO
41 237095fd 2023-06-11 op static struct event siginfo;
43 237095fd 2023-06-11 op static struct event sigusr2;
45 d3a08f4d 2021-01-17 op int connected_clients;
48 86693a33 2023-06-11 op * This function is not publicy exported because it is a hack until libtls
49 86693a33 2023-06-11 op * has a proper privsep setup.
51 86693a33 2023-06-11 op void tls_config_use_fake_private_key(struct tls_config *);
53 49b73ba1 2021-02-10 op static inline int matches(const char*, const char*);
55 fe406389 2021-02-02 op static int check_path(struct client*, const char*, int*);
56 abc007d2 2021-02-08 op static void open_file(struct client*);
57 abc007d2 2021-02-08 op static void handle_handshake(int, short, void*);
58 91b9f2a8 2021-05-15 op static const char *strip_path(const char*, int);
59 57ec3e77 2021-02-08 op static void fmt_sbuf(const char*, struct client*, const char*);
60 abc007d2 2021-02-08 op static int apply_block_return(struct client*);
61 d474a979 2022-01-04 op static int check_matching_certificate(X509_STORE *, struct client *);
62 72b033ef 2021-12-29 op static int apply_reverse_proxy(struct client *);
63 efe7d180 2021-10-02 op static int apply_fastcgi(struct client*);
64 02be96c6 2021-02-09 op static int apply_require_ca(struct client*);
65 abc007d2 2021-02-08 op static void open_dir(struct client*);
66 abc007d2 2021-02-08 op static void redirect_canonical_dir(struct client*);
68 efe7d180 2021-10-02 op static void client_tls_readcb(int, short, void *);
69 efe7d180 2021-10-02 op static void client_tls_writecb(int, short, void *);
71 efe7d180 2021-10-02 op static void client_read(struct bufferevent *, void *);
72 efe7d180 2021-10-02 op void client_write(struct bufferevent *, void *);
73 efe7d180 2021-10-02 op static void client_error(struct bufferevent *, short, void *);
75 efe7d180 2021-10-02 op static void client_close_ev(int, short, void *);
77 bc99d868 2021-03-19 op static void handle_siginfo(int, short, void*);
79 c26f2460 2023-06-08 op static int server_dispatch_parent(int, struct privsep_proc *, struct imsg *);
80 86693a33 2023-06-11 op static int server_dispatch_crypto(int, struct privsep_proc *, struct imsg *);
81 c26f2460 2023-06-08 op static int server_dispatch_logger(int, struct privsep_proc *, struct imsg *);
83 c26f2460 2023-06-08 op static struct privsep_proc procs[] = {
84 c26f2460 2023-06-08 op { "parent", PROC_PARENT, server_dispatch_parent },
85 86693a33 2023-06-11 op { "crypto", PROC_CRYPTO, server_dispatch_crypto },
86 c26f2460 2023-06-08 op { "logger", PROC_LOGGER, server_dispatch_logger },
89 207b3e80 2021-10-07 op static uint32_t server_client_id;
91 207b3e80 2021-10-07 op struct client_tree_id clients;
93 49b73ba1 2021-02-10 op static inline int
94 aa30aaed 2023-06-24 op match_addr(struct address *target, struct address *source)
96 aa30aaed 2023-06-24 op return (target->ai_flags == source->ai_flags &&
97 aa30aaed 2023-06-24 op target->ai_family == source->ai_family &&
98 aa30aaed 2023-06-24 op target->ai_socktype == source->ai_socktype &&
99 aa30aaed 2023-06-24 op target->ai_protocol == source->ai_protocol &&
100 aa30aaed 2023-06-24 op target->slen == source->slen &&
101 aa30aaed 2023-06-24 op !memcmp(&target->ss, &source->ss, target->slen));
104 aa30aaed 2023-06-24 op static inline int
105 49b73ba1 2021-02-10 op matches(const char *pattern, const char *path)
107 49b73ba1 2021-02-10 op if (*path == '/')
109 49b73ba1 2021-02-10 op return !fnmatch(pattern, path, 0);
112 aa30aaed 2023-06-24 op static inline int
113 aa30aaed 2023-06-24 op match_host(struct vhost *v, struct client *c)
115 aa30aaed 2023-06-24 op struct alist *a;
116 aa30aaed 2023-06-24 op struct address *addr;
118 aa30aaed 2023-06-24 op TAILQ_FOREACH(addr, &v->addrs, addrs)
119 aa30aaed 2023-06-24 op if (match_addr(addr, c->addr))
121 aa30aaed 2023-06-24 op if (addr == NULL)
124 aa30aaed 2023-06-24 op if (matches(v->domain, c->domain))
127 aa30aaed 2023-06-24 op TAILQ_FOREACH(a, &v->aliases, aliases)
128 aa30aaed 2023-06-24 op if (matches(a->alias, c->domain))
135 c8b74339 2021-01-24 op vhost_lang(struct vhost *v, const char *path)
137 c8b74339 2021-01-24 op struct location *loc;
139 caad0308 2021-01-27 op if (v == NULL || path == NULL)
142 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
143 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
144 534afd0d 2022-10-05 op if (*loc->lang != '\0') {
145 49b73ba1 2021-02-10 op if (matches(loc->match, path))
146 6016a593 2021-01-30 op return loc->lang;
150 534afd0d 2022-10-05 op loc = TAILQ_FIRST(&v->locations);
151 534afd0d 2022-10-05 op if (*loc->lang == '\0')
153 534afd0d 2022-10-05 op return loc->lang;
157 c8b74339 2021-01-24 op vhost_default_mime(struct vhost *v, const char *path)
159 c8b74339 2021-01-24 op struct location *loc;
160 c8b74339 2021-01-24 op const char *default_mime = "application/octet-stream";
162 caad0308 2021-01-27 op if (v == NULL || path == NULL)
163 caad0308 2021-01-27 op return default_mime;
165 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
166 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
167 534afd0d 2022-10-05 op if (*loc->default_mime != '\0') {
168 49b73ba1 2021-02-10 op if (matches(loc->match, path))
169 6016a593 2021-01-30 op return loc->default_mime;
173 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
174 534afd0d 2022-10-05 op if (*loc->default_mime != '\0')
175 b8e64ccd 2021-03-31 op return loc->default_mime;
176 c8b74339 2021-01-24 op return default_mime;
180 c8b74339 2021-01-24 op vhost_index(struct vhost *v, const char *path)
182 c8b74339 2021-01-24 op struct location *loc;
183 c8b74339 2021-01-24 op const char *index = "index.gmi";
185 caad0308 2021-01-27 op if (v == NULL || path == NULL)
186 caad0308 2021-01-27 op return index;
188 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
189 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
190 534afd0d 2022-10-05 op if (*loc->index != '\0') {
191 49b73ba1 2021-02-10 op if (matches(loc->match, path))
192 6016a593 2021-01-30 op return loc->index;
196 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
197 534afd0d 2022-10-05 op if (*loc->index != '\0')
198 b8e64ccd 2021-03-31 op return loc->index;
199 c8b74339 2021-01-24 op return index;
203 252908e6 2021-01-24 op vhost_auto_index(struct vhost *v, const char *path)
205 252908e6 2021-01-24 op struct location *loc;
207 6016a593 2021-01-30 op if (v == NULL || path == NULL)
210 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
211 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
212 cd761624 2021-02-06 op if (loc->auto_index != 0) {
213 49b73ba1 2021-02-10 op if (matches(loc->match, path))
214 6016a593 2021-01-30 op return loc->auto_index == 1;
218 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
219 b8e64ccd 2021-03-31 op return loc->auto_index == 1;
223 6abda252 2021-02-06 op vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
225 6abda252 2021-02-06 op struct location *loc;
227 6abda252 2021-02-06 op if (v == NULL || path == NULL)
230 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
231 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
232 cd761624 2021-02-06 op if (loc->block_code != 0) {
233 49b73ba1 2021-02-10 op if (matches(loc->match, path)) {
234 6abda252 2021-02-06 op *code = loc->block_code;
235 6abda252 2021-02-06 op *fmt = loc->block_fmt;
241 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
242 b8e64ccd 2021-03-31 op *code = loc->block_code;
243 b8e64ccd 2021-03-31 op *fmt = loc->block_fmt;
244 b8e64ccd 2021-03-31 op return loc->block_code != 0;
248 8ad1c570 2021-05-09 op vhost_fastcgi(struct vhost *v, const char *path)
250 8ad1c570 2021-05-09 op struct location *loc;
252 8ad1c570 2021-05-09 op if (v == NULL || path == NULL)
255 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
256 8ad1c570 2021-05-09 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
257 8ad1c570 2021-05-09 op if (loc->fcgi != -1)
258 8ad1c570 2021-05-09 op if (matches(loc->match, path))
259 8ad1c570 2021-05-09 op return loc->fcgi;
262 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
263 8ad1c570 2021-05-09 op return loc->fcgi;
267 1feaf2a6 2021-05-15 op vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
269 fdea6aa0 2021-04-30 op struct location *loc;
270 1feaf2a6 2021-05-15 op size_t l = 0;
272 fdea6aa0 2021-04-30 op if (v == NULL || path == NULL)
275 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
276 fdea6aa0 2021-04-30 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
278 fdea6aa0 2021-04-30 op if (loc->dirfd != -1)
279 1feaf2a6 2021-05-15 op if (matches(loc->match, path)) {
281 fdea6aa0 2021-04-30 op return loc->dirfd;
286 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
287 fdea6aa0 2021-04-30 op return loc->dirfd;
291 6abda252 2021-02-06 op vhost_strip(struct vhost *v, const char *path)
293 6abda252 2021-02-06 op struct location *loc;
295 6abda252 2021-02-06 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 cd761624 2021-02-06 op if (loc->strip != 0) {
301 49b73ba1 2021-02-10 op if (matches(loc->match, path))
302 6abda252 2021-02-06 op return loc->strip;
306 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
307 b8e64ccd 2021-03-31 op return loc->strip;
311 02be96c6 2021-02-09 op vhost_require_ca(struct vhost *v, const char *path)
313 02be96c6 2021-02-09 op struct location *loc;
315 02be96c6 2021-02-09 op if (v == NULL || path == NULL)
318 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
319 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
320 02be96c6 2021-02-09 op if (loc->reqca != NULL) {
321 49b73ba1 2021-02-10 op if (matches(loc->match, path))
322 02be96c6 2021-02-09 op return loc->reqca;
326 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
327 b8e64ccd 2021-03-31 op return loc->reqca;
331 793835cb 2021-02-23 op vhost_disable_log(struct vhost *v, const char *path)
333 793835cb 2021-02-23 op struct location *loc;
335 793835cb 2021-02-23 op if (v == NULL || path == NULL)
338 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
339 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
340 793835cb 2021-02-23 op if (loc->disable_log && matches(loc->match, path))
344 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
345 b8e64ccd 2021-03-31 op return loc->disable_log;
349 d3a08f4d 2021-01-17 op check_path(struct client *c, const char *path, int *fd)
351 d3a08f4d 2021-01-17 op struct stat sb;
352 d1ca3911 2021-01-21 op const char *p;
353 efb48052 2021-07-27 op int dirfd, strip;
355 d3a08f4d 2021-01-17 op assert(path != NULL);
358 fdea6aa0 2021-04-30 op * in send_dir we add an initial / (to be redirect-friendly),
359 fdea6aa0 2021-04-30 op * but here we want to skip it
361 fdea6aa0 2021-04-30 op if (*path == '/')
364 fdea6aa0 2021-04-30 op strip = vhost_strip(c->host, path);
365 fdea6aa0 2021-04-30 op p = strip_path(path, strip);
367 fdea6aa0 2021-04-30 op if (*p == '/')
369 fdea6aa0 2021-04-30 op if (*p == '\0')
372 1feaf2a6 2021-05-15 op dirfd = vhost_dirfd(c->host, path, &c->loc);
373 eae52ad4 2023-06-06 op log_debug("check_path: strip=%d path=%s original=%s",
374 fdea6aa0 2021-04-30 op strip, p, path);
375 3bd4a6de 2022-07-04 op if (*fd == -1 && (*fd = openat(dirfd, p, O_RDONLY)) == -1) {
376 3bd4a6de 2022-07-04 op if (errno == EACCES)
377 eae52ad4 2023-06-06 op log_info("can't open %s: %s", p, strerror(errno));
378 d3a08f4d 2021-01-17 op return FILE_MISSING;
381 d3a08f4d 2021-01-17 op if (fstat(*fd, &sb) == -1) {
382 eae52ad4 2023-06-06 op log_warn("fstat %s", path);
383 d3a08f4d 2021-01-17 op return FILE_MISSING;
386 d3a08f4d 2021-01-17 op if (S_ISDIR(sb.st_mode))
387 d3a08f4d 2021-01-17 op return FILE_DIRECTORY;
389 d3a08f4d 2021-01-17 op return FILE_EXISTS;
393 abc007d2 2021-02-08 op open_file(struct client *c)
395 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
396 d3a08f4d 2021-01-17 op case FILE_EXISTS:
397 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
398 af1dab18 2023-06-09 op start_reply(c, SUCCESS, mime(c->conf, c->host, c->iri.path));
401 d3a08f4d 2021-01-17 op case FILE_DIRECTORY:
405 d3a08f4d 2021-01-17 op case FILE_MISSING:
406 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
410 d3a08f4d 2021-01-17 op /* unreachable */
416 9b8f5ed2 2021-02-03 op mark_nonblock(int fd)
420 9b8f5ed2 2021-02-03 op if ((flags = fcntl(fd, F_GETFL)) == -1)
421 df5058c9 2023-06-05 op fatal("fcntl(F_GETFL)");
422 9b8f5ed2 2021-02-03 op if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
423 df5058c9 2023-06-05 op fatal("fcntl(F_SETFL)");
427 abc007d2 2021-02-08 op handle_handshake(int fd, short ev, void *d)
429 abc007d2 2021-02-08 op struct client *c = d;
430 af1dab18 2023-06-09 op struct conf *conf = c->conf;
431 d3a08f4d 2021-01-17 op struct vhost *h;
432 d3a08f4d 2021-01-17 op const char *servname;
433 a8d4a897 2021-01-29 op const char *parse_err = "unknown error";
435 d3a08f4d 2021-01-17 op switch (tls_handshake(c->ctx)) {
436 d3a08f4d 2021-01-17 op case 0: /* success */
437 d3a08f4d 2021-01-17 op case -1: /* already handshaked */
439 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
440 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, handle_handshake, c, NULL);
442 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
443 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
446 d3a08f4d 2021-01-17 op /* unreachable */
450 80444938 2021-10-15 op c->bev = bufferevent_new(fd, client_read, client_write,
451 80444938 2021-10-15 op client_error, c);
452 80444938 2021-10-15 op if (c->bev == NULL)
453 df5058c9 2023-06-05 op fatal("%s: failed to allocate client buffer", __func__);
455 80444938 2021-10-15 op event_set(&c->bev->ev_read, c->fd, EV_READ,
456 80444938 2021-10-15 op client_tls_readcb, c->bev);
457 80444938 2021-10-15 op event_set(&c->bev->ev_write, c->fd, EV_WRITE,
458 80444938 2021-10-15 op client_tls_writecb, c->bev);
460 80444938 2021-10-15 op #if HAVE_LIBEVENT2
461 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->input, 0);
462 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->output, 1);
465 79288c8b 2021-09-24 op if ((servname = tls_conn_servername(c->ctx)) == NULL) {
466 eae52ad4 2023-06-06 op log_debug("handshake: missing SNI");
470 a8d4a897 2021-01-29 op if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
471 eae52ad4 2023-06-06 op log_info("puny_decode: %s", parse_err);
475 aa30aaed 2023-06-24 op TAILQ_FOREACH(h, &conf->hosts, vhosts)
476 aa30aaed 2023-06-24 op if (match_host(h, c))
479 eae52ad4 2023-06-06 op log_debug("handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
480 3abf91b0 2021-02-07 op servname != NULL ? servname : "(null)",
482 b8e64ccd 2021-03-31 op h != NULL ? h->domain : "(null)");
484 b8e64ccd 2021-03-31 op if (h != NULL) {
486 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EV_READ);
491 abc007d2 2021-02-08 op start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
494 91b9f2a8 2021-05-15 op static const char *
495 91b9f2a8 2021-05-15 op strip_path(const char *path, int strip)
499 6abda252 2021-02-06 op while (strip > 0) {
500 6abda252 2021-02-06 op if ((t = strchr(path, '/')) == NULL) {
501 6abda252 2021-02-06 op path = strchr(path, '\0');
512 57ec3e77 2021-02-08 op fmt_sbuf(const char *fmt, struct client *c, const char *path)
515 4842c72d 2021-10-18 op char buf[32];
517 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
518 6abda252 2021-02-06 op for (i = 0; *fmt; ++fmt) {
519 6abda252 2021-02-06 op if (i == sizeof(buf)-1 || *fmt == '%') {
520 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
521 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
525 6abda252 2021-02-06 op if (*fmt != '%') {
526 6abda252 2021-02-06 op buf[i++] = *fmt;
530 6abda252 2021-02-06 op switch (*++fmt) {
532 6abda252 2021-02-06 op strlcat(c->sbuf, "%", sizeof(c->sbuf));
535 737a6b50 2021-04-30 op if (*path != '/')
536 737a6b50 2021-04-30 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
537 6abda252 2021-02-06 op strlcat(c->sbuf, path, sizeof(c->sbuf));
540 6abda252 2021-02-06 op strlcat(c->sbuf, c->iri.query, sizeof(c->sbuf));
543 509d0509 2023-06-23 op snprintf(buf, sizeof(buf), "%d", c->addr->port);
544 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
545 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
548 6abda252 2021-02-06 op strlcat(c->sbuf, c->domain, sizeof(c->sbuf));
551 df5058c9 2023-06-05 op fatalx("%s: unknown fmt specifier %c",
552 6abda252 2021-02-06 op __func__, *fmt);
557 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
560 57ec3e77 2021-02-08 op /* 1 if a matching `block return' (and apply it), 0 otherwise */
562 57ec3e77 2021-02-08 op apply_block_return(struct client *c)
564 57ec3e77 2021-02-08 op const char *fmt, *path;
567 57ec3e77 2021-02-08 op if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
570 57ec3e77 2021-02-08 op path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
571 57ec3e77 2021-02-08 op fmt_sbuf(fmt, c, path);
573 abc007d2 2021-02-08 op start_reply(c, code, c->sbuf);
577 b7967bc1 2021-01-02 op static struct proxy *
578 b7967bc1 2021-01-02 op matched_proxy(struct client *c)
580 b7967bc1 2021-01-02 op struct proxy *p;
581 b7967bc1 2021-01-02 op const char *proto;
582 b7967bc1 2021-01-02 op const char *host;
583 b7967bc1 2021-01-02 op const char *port;
585 b7967bc1 2021-01-02 op TAILQ_FOREACH(p, &c->host->proxies, proxies) {
586 534afd0d 2022-10-05 op if (*(proto = p->match_proto) == '\0')
587 b7967bc1 2021-01-02 op proto = "gemini";
588 534afd0d 2022-10-05 op if (*(host = p->match_host) == '\0')
590 534afd0d 2022-10-05 op if (*(port = p->match_port) == '\0')
593 b7967bc1 2021-01-02 op if (matches(proto, c->iri.schema) &&
594 b7967bc1 2021-01-02 op matches(host, c->domain) &&
595 b7967bc1 2021-01-02 op matches(port, c->iri.port))
603 ba94a608 2022-01-04 op check_matching_certificate(X509_STORE *store, struct client *c)
605 ba94a608 2022-01-04 op const uint8_t *cert;
608 ba94a608 2022-01-04 op if (!tls_peer_cert_provided(c->ctx)) {
609 ba94a608 2022-01-04 op start_reply(c, CLIENT_CERT_REQ, "client certificate required");
613 ba94a608 2022-01-04 op cert = tls_peer_cert_chain_pem(c->ctx, &len);
614 ba94a608 2022-01-04 op if (!validate_against_ca(store, cert, len)) {
615 ba94a608 2022-01-04 op start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
623 d29a2ee2 2022-09-06 op proxy_socket(struct client *c, const char *host, const char *port)
625 d29a2ee2 2022-09-06 op struct addrinfo hints, *res, *res0;
626 eae52ad4 2023-06-06 op int r, sock, save_errno;
627 eae52ad4 2023-06-06 op const char *cause = NULL;
629 d29a2ee2 2022-09-06 op memset(&hints, 0, sizeof(hints));
630 d29a2ee2 2022-09-06 op hints.ai_family = AF_UNSPEC;
631 d29a2ee2 2022-09-06 op hints.ai_socktype = SOCK_STREAM;
633 d29a2ee2 2022-09-06 op /* XXX: asr_run? :> */
634 d29a2ee2 2022-09-06 op r = getaddrinfo(host, port, &hints, &res0);
635 d29a2ee2 2022-09-06 op if (r != 0) {
636 eae52ad4 2023-06-06 op log_warnx("getaddrinfo(\"%s\", \"%s\"): %s",
637 d29a2ee2 2022-09-06 op host, port, gai_strerror(r));
641 d29a2ee2 2022-09-06 op for (res = res0; res; res = res->ai_next) {
642 d29a2ee2 2022-09-06 op sock = socket(res->ai_family, res->ai_socktype,
643 d29a2ee2 2022-09-06 op res->ai_protocol);
644 eae52ad4 2023-06-06 op if (sock == -1) {
645 eae52ad4 2023-06-06 op cause = "socket";
649 d29a2ee2 2022-09-06 op if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
650 eae52ad4 2023-06-06 op cause = "connect";
651 eae52ad4 2023-06-06 op save_errno = errno;
653 eae52ad4 2023-06-06 op errno = save_errno;
661 d29a2ee2 2022-09-06 op if (sock == -1)
662 eae52ad4 2023-06-06 op log_warn("can't connect to %s:%s: %s", host, port, cause);
664 eae52ad4 2023-06-06 op freeaddrinfo(res0);
669 72b033ef 2021-12-29 op /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
671 72b033ef 2021-12-29 op apply_reverse_proxy(struct client *c)
673 7bdcc91e 2021-01-01 op struct proxy *p;
675 b7967bc1 2021-01-02 op if ((p = matched_proxy(c)) == NULL)
678 b7967bc1 2021-01-02 op c->proxy = p;
680 ba94a608 2022-01-04 op if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
683 eae52ad4 2023-06-06 op log_debug("opening proxy connection for %s:%s",
684 7bdcc91e 2021-01-01 op p->host, p->port);
686 d29a2ee2 2022-09-06 op if ((c->pfd = proxy_socket(c, p->host, p->port)) == -1) {
687 d29a2ee2 2022-09-06 op start_reply(c, PROXY_ERROR, "proxy error");
691 d29a2ee2 2022-09-06 op mark_nonblock(c->pfd);
692 d29a2ee2 2022-09-06 op if (proxy_init(c) == -1)
693 d29a2ee2 2022-09-06 op start_reply(c, PROXY_ERROR, "proxy error");
699 d29a2ee2 2022-09-06 op fcgi_open_sock(struct fcgi *f)
701 d29a2ee2 2022-09-06 op struct sockaddr_un addr;
704 d29a2ee2 2022-09-06 op if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
705 eae52ad4 2023-06-06 op log_warn("socket");
709 d29a2ee2 2022-09-06 op memset(&addr, 0, sizeof(addr));
710 d29a2ee2 2022-09-06 op addr.sun_family = AF_UNIX;
711 d29a2ee2 2022-09-06 op strlcpy(addr.sun_path, f->path, sizeof(addr.sun_path));
713 d29a2ee2 2022-09-06 op if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
714 eae52ad4 2023-06-06 op log_warn("failed to connect to %s", f->path);
723 d29a2ee2 2022-09-06 op fcgi_open_conn(struct fcgi *f)
725 eae52ad4 2023-06-06 op struct addrinfo hints, *servinfo, *p;
726 eae52ad4 2023-06-06 op int r, sock, save_errno;
727 eae52ad4 2023-06-06 op const char *cause = NULL;
729 d29a2ee2 2022-09-06 op memset(&hints, 0, sizeof(hints));
730 d29a2ee2 2022-09-06 op hints.ai_family = AF_UNSPEC;
731 d29a2ee2 2022-09-06 op hints.ai_socktype = SOCK_STREAM;
732 d29a2ee2 2022-09-06 op hints.ai_flags = AI_ADDRCONFIG;
734 d29a2ee2 2022-09-06 op if ((r = getaddrinfo(f->path, f->port, &hints, &servinfo)) != 0) {
735 eae52ad4 2023-06-06 op log_warnx("getaddrinfo %s:%s: %s", f->path, f->port,
736 d29a2ee2 2022-09-06 op gai_strerror(r));
740 d29a2ee2 2022-09-06 op for (p = servinfo; p != NULL; p = p->ai_next) {
741 d29a2ee2 2022-09-06 op sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
742 eae52ad4 2023-06-06 op if (sock == -1) {
743 eae52ad4 2023-06-06 op cause = "socket";
746 d29a2ee2 2022-09-06 op if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
747 eae52ad4 2023-06-06 op cause = "connect";
748 eae52ad4 2023-06-06 op save_errno = errno;
750 eae52ad4 2023-06-06 op errno = save_errno;
756 d29a2ee2 2022-09-06 op if (p == NULL) {
757 eae52ad4 2023-06-06 op log_warn("couldn't connect to %s:%s: %s", f->path, f->port,
762 d29a2ee2 2022-09-06 op freeaddrinfo(servinfo);
766 8ad1c570 2021-05-09 op /* 1 if matching `fcgi' (and apply it), 0 otherwise */
768 8ad1c570 2021-05-09 op apply_fastcgi(struct client *c)
770 5d22294a 2023-06-09 op int id, i = 0;
771 8ad1c570 2021-05-09 op struct fcgi *f;
773 8ad1c570 2021-05-09 op if ((id = vhost_fastcgi(c->host, c->iri.path)) == -1)
776 af1dab18 2023-06-09 op TAILQ_FOREACH(f, &c->conf->fcgi, fcgi) {
782 5d22294a 2023-06-09 op if (f == NULL) {
783 5d22294a 2023-06-09 op log_warnx("can't find fcgi #%d", id);
787 eae52ad4 2023-06-06 op log_debug("opening fastcgi connection for (%s,%s)",
788 d29a2ee2 2022-09-06 op f->path, f->port);
790 eb4f96c1 2022-11-27 op if (*f->port == '\0')
791 d29a2ee2 2022-09-06 op c->pfd = fcgi_open_sock(f);
793 d29a2ee2 2022-09-06 op c->pfd = fcgi_open_conn(f);
795 d29a2ee2 2022-09-06 op if (c->pfd == -1) {
796 d29a2ee2 2022-09-06 op start_reply(c, CGI_ERROR, "CGI error");
800 d29a2ee2 2022-09-06 op mark_nonblock(c->pfd);
802 d29a2ee2 2022-09-06 op c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
803 d29a2ee2 2022-09-06 op fcgi_error, c);
804 d29a2ee2 2022-09-06 op if (c->cgibev == NULL) {
805 d29a2ee2 2022-09-06 op start_reply(c, TEMP_FAILURE, "internal server error");
809 d29a2ee2 2022-09-06 op bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
815 02be96c6 2021-02-09 op /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
817 02be96c6 2021-02-09 op apply_require_ca(struct client *c)
819 02be96c6 2021-02-09 op X509_STORE *store;
821 02be96c6 2021-02-09 op if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
823 ba94a608 2022-01-04 op return check_matching_certificate(store, c);
827 abc007d2 2021-02-08 op open_dir(struct client *c)
830 11c98667 2021-04-25 op int dirfd, root;
831 252908e6 2021-01-24 op char *before_file;
833 11c98667 2021-04-25 op root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
835 0be51733 2021-01-20 op len = strlen(c->iri.path);
836 252908e6 2021-01-24 op if (len > 0 && !ends_with(c->iri.path, "/")) {
837 abc007d2 2021-02-08 op redirect_canonical_dir(c);
841 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
842 d1ca3911 2021-01-21 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
843 d1ca3911 2021-01-21 op if (!ends_with(c->sbuf, "/"))
844 0be51733 2021-01-20 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
845 252908e6 2021-01-24 op before_file = strchr(c->sbuf, '\0');
846 c8b74339 2021-01-24 op len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
847 c8b74339 2021-01-24 op sizeof(c->sbuf));
848 252908e6 2021-01-24 op if (len >= sizeof(c->sbuf)) {
849 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
853 252908e6 2021-01-24 op c->iri.path = c->sbuf;
855 252908e6 2021-01-24 op /* close later unless we have to generate the dir listing */
856 abc007d2 2021-02-08 op dirfd = c->pfd;
859 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
860 252908e6 2021-01-24 op case FILE_EXISTS:
861 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
862 af1dab18 2023-06-09 op start_reply(c, SUCCESS, mime(c->conf, c->host, c->iri.path));
865 252908e6 2021-01-24 op case FILE_DIRECTORY:
866 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
869 252908e6 2021-01-24 op case FILE_MISSING:
870 252908e6 2021-01-24 op *before_file = '\0';
872 252908e6 2021-01-24 op if (!vhost_auto_index(c->host, c->iri.path)) {
873 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
877 efe7d180 2021-10-02 op c->type = REQUEST_DIR;
879 e76f2c74 2021-04-25 op c->dirlen = scandir_fd(dirfd, &c->dir,
880 11c98667 2021-04-25 op root ? select_non_dotdot : select_non_dot,
882 11c98667 2021-04-25 op if (c->dirlen == -1) {
883 eae52ad4 2023-06-06 op log_warn("scandir_fd(%d) (vhost:%s) %s",
884 eae52ad4 2023-06-06 op c->pfd, c->host->domain, c->iri.path);
885 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
888 11c98667 2021-04-25 op c->diroff = 0;
891 4842c72d 2021-10-18 op start_reply(c, SUCCESS, "text/gemini");
892 efe7d180 2021-10-02 op evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
893 efe7d180 2021-10-02 op "# Index of %s\n\n", c->iri.path);
897 252908e6 2021-01-24 op /* unreachable */
901 252908e6 2021-01-24 op close(dirfd);
905 abc007d2 2021-02-08 op redirect_canonical_dir(struct client *c)
909 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
910 252908e6 2021-01-24 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
911 252908e6 2021-01-24 op len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
913 0be51733 2021-01-20 op if (len >= sizeof(c->sbuf)) {
914 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
918 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
922 efe7d180 2021-10-02 op client_tls_readcb(int fd, short event, void *d)
924 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
925 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
928 efe7d180 2021-10-02 op int what = EVBUFFER_READ;
929 efe7d180 2021-10-02 op int howmuch = IBUF_READ_SIZE;
930 efe7d180 2021-10-02 op char buf[IBUF_READ_SIZE];
932 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
933 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
937 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0)
938 efe7d180 2021-10-02 op howmuch = MIN(sizeof(buf), bufev->wm_read.high);
940 efe7d180 2021-10-02 op switch (ret = tls_read(client->ctx, buf, howmuch)) {
941 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
942 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
945 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
950 efe7d180 2021-10-02 op if (len == 0) {
951 efe7d180 2021-10-02 op what |= EVBUFFER_EOF;
955 efe7d180 2021-10-02 op if (evbuffer_add(bufev->input, buf, len) == -1) {
956 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
960 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
961 efe7d180 2021-10-02 op if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
963 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
965 efe7d180 2021-10-02 op * here we could implement a read pressure policy.
969 efe7d180 2021-10-02 op if (bufev->readcb != NULL)
970 efe7d180 2021-10-02 op (*bufev->readcb)(bufev, bufev->cbarg);
975 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
979 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
983 efe7d180 2021-10-02 op client_tls_writecb(int fd, short event, void *d)
985 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
986 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
989 efe7d180 2021-10-02 op short what = EVBUFFER_WRITE;
991 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
992 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
996 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0) {
997 efe7d180 2021-10-02 op ret = tls_write(client->ctx,
998 efe7d180 2021-10-02 op EVBUFFER_DATA(bufev->output),
999 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output));
1000 efe7d180 2021-10-02 op switch (ret) {
1001 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
1002 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
1005 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
1009 efe7d180 2021-10-02 op evbuffer_drain(bufev->output, len);
1012 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0)
1013 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
1015 efe7d180 2021-10-02 op if (bufev->writecb != NULL &&
1016 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
1017 efe7d180 2021-10-02 op (*bufev->writecb)(bufev, bufev->cbarg);
1021 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
1024 eae52ad4 2023-06-06 op log_warnx("tls error: %s", tls_error(client->ctx));
1025 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
1029 efe7d180 2021-10-02 op client_read(struct bufferevent *bev, void *d)
1031 efe7d180 2021-10-02 op struct client *c = d;
1032 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
1033 efe7d180 2021-10-02 op const char *parse_err = "invalid request";
1034 efe7d180 2021-10-02 op char decoded[DOMAIN_NAME_LEN];
1037 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ);
1040 901905e0 2022-01-05 op * libevent2 can still somehow call this function, even
1041 901905e0 2022-01-05 op * though I never enable EV_READ in the bufferevent. If
1042 901905e0 2022-01-05 op * that's the case, bail out.
1044 901905e0 2022-01-05 op if (c->type != REQUEST_UNDECIDED)
1047 efe7d180 2021-10-02 op /* max url len + \r\n */
1048 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(src) > 1024 + 2) {
1049 eae52ad4 2023-06-06 op log_debug("too much data received");
1050 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "bad request");
1054 efe7d180 2021-10-02 op c->req = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
1055 efe7d180 2021-10-02 op if (c->req == NULL) {
1056 efe7d180 2021-10-02 op /* not enough data yet. */
1057 efe7d180 2021-10-02 op bufferevent_enable(bev, EVBUFFER_READ);
1060 ea27eaaa 2022-03-27 op c->reqlen = strlen(c->req);
1061 ea27eaaa 2022-03-27 op if (c->reqlen > 1024+2) {
1062 eae52ad4 2023-06-06 op log_debug("URL too long");
1063 ea27eaaa 2022-03-27 op start_reply(c, BAD_REQUEST, "bad request");
1067 efe7d180 2021-10-02 op if (!parse_iri(c->req, &c->iri, &parse_err) ||
1068 efe7d180 2021-10-02 op !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
1069 eae52ad4 2023-06-06 op log_debug("IRI parse error: %s", parse_err);
1070 807a80cb 2021-10-06 op start_reply(c, BAD_REQUEST, "bad request");
1074 72b033ef 2021-12-29 op if (apply_reverse_proxy(c))
1077 52c92ef6 2021-12-09 op /* ignore the port number */
1078 52c92ef6 2021-12-09 op if (strcmp(c->iri.schema, "gemini") ||
1079 efe7d180 2021-10-02 op strcmp(decoded, c->domain)) {
1080 efe7d180 2021-10-02 op start_reply(c, PROXY_REFUSED, "won't proxy request");
1084 efe7d180 2021-10-02 op if (apply_require_ca(c) ||
1085 efe7d180 2021-10-02 op apply_block_return(c)||
1086 efe7d180 2021-10-02 op apply_fastcgi(c))
1089 efe7d180 2021-10-02 op open_file(c);
1093 efe7d180 2021-10-02 op client_write(struct bufferevent *bev, void *d)
1095 efe7d180 2021-10-02 op struct client *c = d;
1096 efe7d180 2021-10-02 op struct evbuffer *out = EVBUFFER_OUTPUT(bev);
1097 f2f8eb35 2022-07-04 op char nam[PATH_MAX];
1098 efe7d180 2021-10-02 op char buf[BUFSIZ];
1101 efe7d180 2021-10-02 op switch (c->type) {
1102 efe7d180 2021-10-02 op case REQUEST_UNDECIDED:
1104 efe7d180 2021-10-02 op * Ignore spurious calls when we still don't have idea
1105 efe7d180 2021-10-02 op * what to do with the request.
1109 efe7d180 2021-10-02 op case REQUEST_FILE:
1110 efe7d180 2021-10-02 op if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1111 eae52ad4 2023-06-06 op log_warn("read");
1112 efe7d180 2021-10-02 op client_error(bev, EVBUFFER_ERROR, c);
1114 efe7d180 2021-10-02 op } else if (r == 0) {
1115 efe7d180 2021-10-02 op client_close(c);
1117 efe7d180 2021-10-02 op } else if (r != sizeof(buf))
1118 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1119 efe7d180 2021-10-02 op bufferevent_write(bev, buf, r);
1122 efe7d180 2021-10-02 op case REQUEST_DIR:
1123 efe7d180 2021-10-02 op /* TODO: handle big big directories better */
1124 efe7d180 2021-10-02 op for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1125 543f4a66 2022-07-04 op const char *sufx = "";
1127 f2f8eb35 2022-07-04 op encode_path(nam, sizeof(nam),
1128 efe7d180 2021-10-02 op c->dir[c->diroff]->d_name);
1129 543f4a66 2022-07-04 op if (c->dir[c->diroff]->d_type == DT_DIR)
1131 543f4a66 2022-07-04 op evbuffer_add_printf(out, "=> ./%s%s\n", nam, sufx);
1132 efe7d180 2021-10-02 op free(c->dir[c->diroff]);
1134 efe7d180 2021-10-02 op free(c->dir);
1135 efe7d180 2021-10-02 op c->dir = NULL;
1137 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1139 efe7d180 2021-10-02 op event_add(&c->bev->ev_write, NULL);
1142 efe7d180 2021-10-02 op case REQUEST_FCGI:
1143 72b033ef 2021-12-29 op case REQUEST_PROXY:
1145 d29a2ee2 2022-09-06 op * Here we depend on fastcgi or proxy connection to
1146 d29a2ee2 2022-09-06 op * provide data.
1150 efe7d180 2021-10-02 op case REQUEST_DONE:
1151 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(out) == 0)
1152 efe7d180 2021-10-02 op client_close(c);
1158 efe7d180 2021-10-02 op client_error(struct bufferevent *bev, short error, void *d)
1160 efe7d180 2021-10-02 op struct client *c = d;
1162 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1164 efe7d180 2021-10-02 op if (error & EVBUFFER_TIMEOUT) {
1165 eae52ad4 2023-06-06 op log_debug("timeout; forcefully closing the connection");
1166 efe7d180 2021-10-02 op if (c->code == 0)
1167 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "timeout");
1169 efe7d180 2021-10-02 op client_close(c);
1173 efe7d180 2021-10-02 op if (error & EVBUFFER_EOF) {
1174 efe7d180 2021-10-02 op client_close(c);
1178 eae52ad4 2023-06-06 op log_warnx("unknown bufferevent error 0x%x", error);
1179 efe7d180 2021-10-02 op client_close(c);
1183 efe7d180 2021-10-02 op start_reply(struct client *c, int code, const char *meta)
1185 efe7d180 2021-10-02 op struct evbuffer *evb = EVBUFFER_OUTPUT(c->bev);
1186 efe7d180 2021-10-02 op const char *lang;
1189 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EVBUFFER_WRITE);
1191 efe7d180 2021-10-02 op c->code = code;
1192 efe7d180 2021-10-02 op c->meta = meta;
1194 efe7d180 2021-10-02 op r = evbuffer_add_printf(evb, "%d %s", code, meta);
1195 efe7d180 2021-10-02 op if (r == -1)
1198 efe7d180 2021-10-02 op /* 2 digit status + space + 1024 max reply */
1199 efe7d180 2021-10-02 op if (r > 1027)
1200 efe7d180 2021-10-02 op goto overflow;
1202 d29a2ee2 2022-09-06 op if (c->type != REQUEST_FCGI &&
1203 72b033ef 2021-12-29 op c->type != REQUEST_PROXY &&
1204 efe7d180 2021-10-02 op !strcmp(meta, "text/gemini") &&
1205 efe7d180 2021-10-02 op (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1206 4842c72d 2021-10-18 op rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1207 efe7d180 2021-10-02 op if (rr == -1)
1209 efe7d180 2021-10-02 op if (r + rr > 1027)
1210 efe7d180 2021-10-02 op goto overflow;
1213 efe7d180 2021-10-02 op bufferevent_write(c->bev, "\r\n", 2);
1215 efe7d180 2021-10-02 op if (!vhost_disable_log(c->host, c->iri.path))
1216 b8d68fc8 2023-06-11 op log_request(c, (char *)EVBUFFER_DATA(evb),
1217 b8d68fc8 2023-06-11 op EVBUFFER_LENGTH(evb));
1219 d28bd963 2022-01-27 op if (code != 20)
1220 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1225 eae52ad4 2023-06-06 op log_warnx("evbuffer_add_printf error: no memory");
1226 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1227 efe7d180 2021-10-02 op client_close(c);
1231 eae52ad4 2023-06-06 op log_warnx("reply header overflow");
1232 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1233 efe7d180 2021-10-02 op start_reply(c, TEMP_FAILURE, "internal error");
1237 efe7d180 2021-10-02 op client_close_ev(int fd, short event, void *d)
1239 8ad1c570 2021-05-09 op struct client *c = d;
1241 d3a08f4d 2021-01-17 op switch (tls_close(c->ctx)) {
1242 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
1243 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1245 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
1246 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1250 d3a08f4d 2021-01-17 op connected_clients--;
1252 e4daebe4 2021-10-06 op free(c->req);
1254 d3a08f4d 2021-01-17 op tls_free(c->ctx);
1255 d3a08f4d 2021-01-17 op c->ctx = NULL;
1257 efe7d180 2021-10-02 op free(c->header);
1259 abc007d2 2021-02-08 op if (c->pfd != -1)
1260 abc007d2 2021-02-08 op close(c->pfd);
1262 252908e6 2021-01-24 op if (c->dir != NULL)
1263 11c98667 2021-04-25 op free(c->dir);
1265 abc007d2 2021-02-08 op close(c->fd);
1270 72b033ef 2021-12-29 op client_proxy_close(int fd, short event, void *d)
1272 72b033ef 2021-12-29 op struct tls *ctx = d;
1274 72b033ef 2021-12-29 op if (ctx == NULL) {
1279 72b033ef 2021-12-29 op switch (tls_close(ctx)) {
1280 72b033ef 2021-12-29 op case TLS_WANT_POLLIN:
1281 72b033ef 2021-12-29 op event_once(fd, EV_READ, client_proxy_close, d, NULL);
1283 72b033ef 2021-12-29 op case TLS_WANT_POLLOUT:
1284 72b033ef 2021-12-29 op event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1288 72b033ef 2021-12-29 op tls_free(ctx);
1293 efe7d180 2021-10-02 op client_close(struct client *c)
1296 efe7d180 2021-10-02 op * We may end up calling client_close in various situations
1297 efe7d180 2021-10-02 op * and for the most unexpected reasons. Therefore, we need to
1298 b9b77f53 2022-01-27 op * ensure that everything gets properly released once we reach
1299 efe7d180 2021-10-02 op * this point.
1302 207b3e80 2021-10-07 op SPLAY_REMOVE(client_tree_id, &clients, c);
1304 efe7d180 2021-10-02 op if (c->cgibev != NULL) {
1305 efe7d180 2021-10-02 op bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1306 efe7d180 2021-10-02 op bufferevent_free(c->cgibev);
1307 efe7d180 2021-10-02 op c->cgibev = NULL;
1308 efe7d180 2021-10-02 op close(c->pfd);
1309 efe7d180 2021-10-02 op c->pfd = -1;
1312 efe7d180 2021-10-02 op bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1313 efe7d180 2021-10-02 op bufferevent_free(c->bev);
1314 efe7d180 2021-10-02 op c->bev = NULL;
1316 e0f6dc64 2022-01-27 op if (c->proxyevset &&
1317 e0f6dc64 2022-01-27 op event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1318 e0f6dc64 2022-01-27 op c->proxyevset = 0;
1319 e0f6dc64 2022-01-27 op event_del(&c->proxyev);
1322 e0f6dc64 2022-01-27 op if (c->pfd != -1 && c->proxyctx != NULL) {
1323 e0f6dc64 2022-01-27 op /* shut down the proxy TLS connection */
1324 e0f6dc64 2022-01-27 op client_proxy_close(c->pfd, 0, c->proxyctx);
1325 e0f6dc64 2022-01-27 op c->pfd = -1;
1328 e0f6dc64 2022-01-27 op if (c->proxybev != NULL)
1329 e0f6dc64 2022-01-27 op bufferevent_free(c->proxybev);
1331 efe7d180 2021-10-02 op client_close_ev(c->fd, 0, c);
1335 abc007d2 2021-02-08 op do_accept(int sock, short et, void *d)
1337 509d0509 2023-06-23 op struct address *addr = d;
1338 abc007d2 2021-02-08 op struct client *c;
1339 37df23d1 2023-06-23 op struct sockaddr_storage raddr;
1340 37df23d1 2023-06-23 op struct sockaddr *sraddr;
1341 d3a08f4d 2021-01-17 op socklen_t len;
1344 37df23d1 2023-06-23 op sraddr = (struct sockaddr *)&raddr;
1345 37df23d1 2023-06-23 op len = sizeof(raddr);
1346 37df23d1 2023-06-23 op if ((fd = accept(sock, sraddr, &len)) == -1) {
1347 c62a411f 2021-10-13 op if (errno == EWOULDBLOCK || errno == EAGAIN ||
1348 c62a411f 2021-10-13 op errno == ECONNABORTED)
1350 df5058c9 2023-06-05 op fatal("accept");
1353 3cb3dd4d 2021-02-12 op mark_nonblock(fd);
1355 207b3e80 2021-10-07 op c = xcalloc(1, sizeof(*c));
1356 509d0509 2023-06-23 op c->conf = addr->conf;
1357 509d0509 2023-06-23 op c->addr = addr;
1358 207b3e80 2021-10-07 op c->id = ++server_client_id;
1360 207b3e80 2021-10-07 op c->pfd = -1;
1361 37df23d1 2023-06-23 op memcpy(&c->raddr, &raddr, sizeof(raddr));
1362 37df23d1 2023-06-23 op c->raddrlen = len;
1364 e50f85ad 2023-06-24 op if (tls_accept_socket(addr->ctx, &c->ctx, fd) == -1) {
1365 eae52ad4 2023-06-06 op log_warnx("failed to accept socket: %s", tls_error(c->ctx));
1366 207b3e80 2021-10-07 op close(c->fd);
1371 207b3e80 2021-10-07 op SPLAY_INSERT(client_tree_id, &clients, c);
1372 207b3e80 2021-10-07 op event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1373 207b3e80 2021-10-07 op connected_clients++;
1376 8ad1c570 2021-05-09 op struct client *
1377 3fdc457c 2022-03-26 op client_by_id(int id)
1379 207b3e80 2021-10-07 op struct client find;
1381 207b3e80 2021-10-07 op find.id = id;
1382 207b3e80 2021-10-07 op return SPLAY_FIND(client_tree_id, &clients, &find);
1386 abc007d2 2021-02-08 op handle_siginfo(int fd, short ev, void *d)
1388 eae52ad4 2023-06-06 op log_info("%d connected clients", connected_clients);
1392 e50f85ad 2023-06-24 op add_matching_kps(struct tls_config *tlsconf, struct address *addr,
1393 e50f85ad 2023-06-24 op struct conf *conf)
1395 e50f85ad 2023-06-24 op struct address *vaddr;
1396 e50f85ad 2023-06-24 op struct vhost *h;
1397 e50f85ad 2023-06-24 op int r, any = 0;
1399 e50f85ad 2023-06-24 op TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1400 e50f85ad 2023-06-24 op TAILQ_FOREACH(vaddr, &h->addrs, addrs) {
1401 aa30aaed 2023-06-24 op if (!match_addr(addr, vaddr))
1406 e50f85ad 2023-06-24 op r = tls_config_set_keypair_ocsp_mem(tlsconf,
1407 e50f85ad 2023-06-24 op h->cert, h->certlen, h->key, h->keylen,
1408 e50f85ad 2023-06-24 op h->ocsp, h->ocsplen);
1410 e50f85ad 2023-06-24 op r = tls_config_add_keypair_ocsp_mem(tlsconf,
1411 e50f85ad 2023-06-24 op h->cert, h->certlen, h->key, h->keylen,
1412 e50f85ad 2023-06-24 op h->ocsp, h->ocsplen);
1415 e50f85ad 2023-06-24 op if (r == -1)
1416 e50f85ad 2023-06-24 op fatalx("failed to load keypair"
1417 e50f85ad 2023-06-24 op " for host %s: %s", h->domain,
1418 e50f85ad 2023-06-24 op tls_config_error(tlsconf));
1424 af1dab18 2023-06-09 op setup_tls(struct conf *conf)
1426 070b3295 2023-06-05 op struct tls_config *tlsconf;
1427 e50f85ad 2023-06-24 op struct address *addr;
1429 e50f85ad 2023-06-24 op TAILQ_FOREACH(addr, &conf->addrs, addrs) {
1430 e50f85ad 2023-06-24 op if ((tlsconf = tls_config_new()) == NULL)
1431 e50f85ad 2023-06-24 op fatal("tls_config_new");
1433 e50f85ad 2023-06-24 op if (conf->use_privsep_crypto)
1434 e50f85ad 2023-06-24 op tls_config_use_fake_private_key(tlsconf);
1436 e50f85ad 2023-06-24 op /* optionally accept client certs but don't verify */
1437 e50f85ad 2023-06-24 op tls_config_verify_client_optional(tlsconf);
1438 e50f85ad 2023-06-24 op tls_config_insecure_noverifycert(tlsconf);
1440 e50f85ad 2023-06-24 op if (tls_config_set_protocols(tlsconf, conf->protos) == -1)
1441 e50f85ad 2023-06-24 op fatalx("tls_config_set_protocols: %s",
1442 e50f85ad 2023-06-24 op tls_config_error(tlsconf));
1444 e50f85ad 2023-06-24 op add_matching_kps(tlsconf, addr, conf);
1446 e50f85ad 2023-06-24 op tls_reset(addr->ctx);
1447 e50f85ad 2023-06-24 op if (tls_configure(addr->ctx, tlsconf) == -1)
1448 e50f85ad 2023-06-24 op fatalx("tls_configure: %s", tls_error(addr->ctx));
1450 e50f85ad 2023-06-24 op tls_config_free(tlsconf);
1455 af1dab18 2023-06-09 op load_vhosts(struct conf *conf)
1457 a01a91db 2023-06-05 op struct vhost *h;
1458 a01a91db 2023-06-05 op struct location *l;
1460 af1dab18 2023-06-09 op TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1461 a01a91db 2023-06-05 op TAILQ_FOREACH(l, &h->locations, locations) {
1462 a01a91db 2023-06-05 op if (*l->dir == '\0')
1464 a01a91db 2023-06-05 op l->dirfd = open(l->dir, O_RDONLY | O_DIRECTORY);
1465 a01a91db 2023-06-05 op if (l->dirfd == -1)
1466 df5058c9 2023-06-05 op fatal("open %s for domain %s", l->dir,
1473 c26f2460 2023-06-08 op server(struct privsep *ps, struct privsep_proc *p)
1475 c26f2460 2023-06-08 op proc_run(ps, p, procs, nitems(procs), server_init, NULL);
1479 c26f2460 2023-06-08 op server_init(struct privsep *ps, struct privsep_proc *p, void *arg)
1481 ba290ef3 2023-06-11 op struct conf *c;
1483 c26f2460 2023-06-08 op SPLAY_INIT(&clients);
1485 c26f2460 2023-06-08 op #ifdef SIGINFO
1486 c26f2460 2023-06-08 op signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1487 c26f2460 2023-06-08 op signal_add(&siginfo, NULL);
1489 c26f2460 2023-06-08 op signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1490 c26f2460 2023-06-08 op signal_add(&sigusr2, NULL);
1492 c26f2460 2023-06-08 op sandbox_server_process();
1495 86693a33 2023-06-11 op * ge doesn't use the privsep crypto engine; it doesn't use
1496 86693a33 2023-06-11 op * privsep at all so `ps' is NULL.
1498 ba290ef3 2023-06-11 op if (ps != NULL) {
1499 ba290ef3 2023-06-11 op c = ps->ps_env;
1500 ba290ef3 2023-06-11 op if (c->use_privsep_crypto)
1501 ba290ef3 2023-06-11 op crypto_engine_init(ps->ps_env);
1506 3886afce 2023-06-08 op server_configure_done(struct conf *conf)
1508 509d0509 2023-06-23 op struct address *addr;
1510 3886afce 2023-06-08 op if (load_default_mime(&conf->mime) == -1)
1511 3886afce 2023-06-08 op fatal("can't load default mime");
1512 3886afce 2023-06-08 op sort_mime(&conf->mime);
1513 af1dab18 2023-06-09 op setup_tls(conf);
1514 af1dab18 2023-06-09 op load_vhosts(conf);
1516 509d0509 2023-06-23 op TAILQ_FOREACH(addr, &conf->addrs, addrs) {
1517 509d0509 2023-06-23 op if (addr->sock != -1)
1518 509d0509 2023-06-23 op event_add(&addr->evsock, NULL);
1525 c26f2460 2023-06-08 op server_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
1527 c26f2460 2023-06-08 op struct privsep *ps = p->p_ps;
1528 c26f2460 2023-06-08 op struct conf *conf = ps->ps_env;
1530 c26f2460 2023-06-08 op switch (imsg->hdr.type) {
1531 c26f2460 2023-06-08 op case IMSG_RECONF_START:
1532 c26f2460 2023-06-08 op case IMSG_RECONF_MIME:
1533 c26f2460 2023-06-08 op case IMSG_RECONF_PROTOS:
1534 509d0509 2023-06-23 op case IMSG_RECONF_SOCK:
1535 c26f2460 2023-06-08 op case IMSG_RECONF_FCGI:
1536 c26f2460 2023-06-08 op case IMSG_RECONF_HOST:
1537 c26f2460 2023-06-08 op case IMSG_RECONF_CERT:
1538 c26f2460 2023-06-08 op case IMSG_RECONF_KEY:
1539 c26f2460 2023-06-08 op case IMSG_RECONF_OCSP:
1540 a0a42860 2023-06-24 op case IMSG_RECONF_HOST_ADDR:
1541 c26f2460 2023-06-08 op case IMSG_RECONF_LOC:
1542 c26f2460 2023-06-08 op case IMSG_RECONF_ENV:
1543 c26f2460 2023-06-08 op case IMSG_RECONF_ALIAS:
1544 c26f2460 2023-06-08 op case IMSG_RECONF_PROXY:
1545 deadd9e1 2023-06-09 op case IMSG_RECONF_PROXY_CERT:
1546 deadd9e1 2023-06-09 op case IMSG_RECONF_PROXY_KEY:
1547 c26f2460 2023-06-08 op return config_recv(conf, imsg);
1548 c26f2460 2023-06-08 op case IMSG_RECONF_END:
1549 c26f2460 2023-06-08 op if (config_recv(conf, imsg) == -1)
1551 3886afce 2023-06-08 op if (server_configure_done(conf) == -1)
1562 86693a33 2023-06-11 op server_dispatch_crypto(int fd, struct privsep_proc *p, struct imsg *imsg)
1568 c26f2460 2023-06-08 op server_dispatch_logger(int fd, struct privsep_proc *p, struct imsg *imsg)
1574 207b3e80 2021-10-07 op client_tree_cmp(struct client *a, struct client *b)
1576 207b3e80 2021-10-07 op if (a->id == b->id)
1578 207b3e80 2021-10-07 op else if (a->id < b->id)
1584 207b3e80 2021-10-07 op SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)
