2 a555e0d6 2022-07-04 op * Copyright (c) 2021, 2022 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 281a8852 2023-06-06 op #include "logger.h"
32 eae52ad4 2023-06-06 op #include "log.h"
34 efe7d180 2021-10-02 op #define MIN(a, b) ((a) < (b) ? (a) : (b))
36 090b8a89 2021-07-06 op int shutting_down;
38 bc99d868 2021-03-19 op static struct tls *ctx;
40 bc99d868 2021-03-19 op static struct event e4, e6, imsgev, siginfo, sigusr2;
41 6b191ed5 2021-02-23 op static int has_ipv6, has_siginfo;
43 d3a08f4d 2021-01-17 op int connected_clients;
45 49b73ba1 2021-02-10 op static inline int matches(const char*, const char*);
47 fe406389 2021-02-02 op static int check_path(struct client*, const char*, int*);
48 abc007d2 2021-02-08 op static void open_file(struct client*);
49 abc007d2 2021-02-08 op static void handle_handshake(int, short, void*);
50 91b9f2a8 2021-05-15 op static const char *strip_path(const char*, int);
51 57ec3e77 2021-02-08 op static void fmt_sbuf(const char*, struct client*, const char*);
52 abc007d2 2021-02-08 op static int apply_block_return(struct client*);
53 d474a979 2022-01-04 op static int check_matching_certificate(X509_STORE *, struct client *);
54 72b033ef 2021-12-29 op static int apply_reverse_proxy(struct client *);
55 efe7d180 2021-10-02 op static int apply_fastcgi(struct client*);
56 02be96c6 2021-02-09 op static int apply_require_ca(struct client*);
57 abc007d2 2021-02-08 op static void open_dir(struct client*);
58 abc007d2 2021-02-08 op static void redirect_canonical_dir(struct client*);
60 efe7d180 2021-10-02 op static void client_tls_readcb(int, short, void *);
61 efe7d180 2021-10-02 op static void client_tls_writecb(int, short, void *);
63 efe7d180 2021-10-02 op static void client_read(struct bufferevent *, void *);
64 efe7d180 2021-10-02 op void client_write(struct bufferevent *, void *);
65 efe7d180 2021-10-02 op static void client_error(struct bufferevent *, short, void *);
67 efe7d180 2021-10-02 op static void client_close_ev(int, short, void *);
69 abc007d2 2021-02-08 op static void do_accept(int, short, void*);
71 efe7d180 2021-10-02 op static void handle_dispatch_imsg(int, short, void *);
72 bc99d868 2021-03-19 op static void handle_siginfo(int, short, void*);
74 207b3e80 2021-10-07 op static uint32_t server_client_id;
76 207b3e80 2021-10-07 op struct client_tree_id clients;
78 49b73ba1 2021-02-10 op static inline int
79 49b73ba1 2021-02-10 op matches(const char *pattern, const char *path)
81 49b73ba1 2021-02-10 op if (*path == '/')
83 49b73ba1 2021-02-10 op return !fnmatch(pattern, path, 0);
87 c8b74339 2021-01-24 op vhost_lang(struct vhost *v, const char *path)
89 c8b74339 2021-01-24 op struct location *loc;
91 caad0308 2021-01-27 op if (v == NULL || path == NULL)
94 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
95 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
96 534afd0d 2022-10-05 op if (*loc->lang != '\0') {
97 49b73ba1 2021-02-10 op if (matches(loc->match, path))
98 6016a593 2021-01-30 op return loc->lang;
102 534afd0d 2022-10-05 op loc = TAILQ_FIRST(&v->locations);
103 534afd0d 2022-10-05 op if (*loc->lang == '\0')
105 534afd0d 2022-10-05 op return loc->lang;
109 c8b74339 2021-01-24 op vhost_default_mime(struct vhost *v, const char *path)
111 c8b74339 2021-01-24 op struct location *loc;
112 c8b74339 2021-01-24 op const char *default_mime = "application/octet-stream";
114 caad0308 2021-01-27 op if (v == NULL || path == NULL)
115 caad0308 2021-01-27 op return default_mime;
117 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
118 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
119 534afd0d 2022-10-05 op if (*loc->default_mime != '\0') {
120 49b73ba1 2021-02-10 op if (matches(loc->match, path))
121 6016a593 2021-01-30 op return loc->default_mime;
125 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
126 534afd0d 2022-10-05 op if (*loc->default_mime != '\0')
127 b8e64ccd 2021-03-31 op return loc->default_mime;
128 c8b74339 2021-01-24 op return default_mime;
132 c8b74339 2021-01-24 op vhost_index(struct vhost *v, const char *path)
134 c8b74339 2021-01-24 op struct location *loc;
135 c8b74339 2021-01-24 op const char *index = "index.gmi";
137 caad0308 2021-01-27 op if (v == NULL || path == NULL)
138 caad0308 2021-01-27 op return index;
140 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
141 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
142 534afd0d 2022-10-05 op if (*loc->index != '\0') {
143 49b73ba1 2021-02-10 op if (matches(loc->match, path))
144 6016a593 2021-01-30 op return loc->index;
148 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
149 534afd0d 2022-10-05 op if (*loc->index != '\0')
150 b8e64ccd 2021-03-31 op return loc->index;
151 c8b74339 2021-01-24 op return index;
155 252908e6 2021-01-24 op vhost_auto_index(struct vhost *v, const char *path)
157 252908e6 2021-01-24 op struct location *loc;
159 6016a593 2021-01-30 op if (v == NULL || path == NULL)
162 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
163 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
164 cd761624 2021-02-06 op if (loc->auto_index != 0) {
165 49b73ba1 2021-02-10 op if (matches(loc->match, path))
166 6016a593 2021-01-30 op return loc->auto_index == 1;
170 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
171 b8e64ccd 2021-03-31 op return loc->auto_index == 1;
175 6abda252 2021-02-06 op vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
177 6abda252 2021-02-06 op struct location *loc;
179 6abda252 2021-02-06 op if (v == NULL || path == NULL)
182 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
183 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
184 cd761624 2021-02-06 op if (loc->block_code != 0) {
185 49b73ba1 2021-02-10 op if (matches(loc->match, path)) {
186 6abda252 2021-02-06 op *code = loc->block_code;
187 6abda252 2021-02-06 op *fmt = loc->block_fmt;
193 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
194 b8e64ccd 2021-03-31 op *code = loc->block_code;
195 b8e64ccd 2021-03-31 op *fmt = loc->block_fmt;
196 b8e64ccd 2021-03-31 op return loc->block_code != 0;
200 8ad1c570 2021-05-09 op vhost_fastcgi(struct vhost *v, const char *path)
202 8ad1c570 2021-05-09 op struct location *loc;
204 8ad1c570 2021-05-09 op if (v == NULL || path == NULL)
207 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
208 8ad1c570 2021-05-09 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
209 8ad1c570 2021-05-09 op if (loc->fcgi != -1)
210 8ad1c570 2021-05-09 op if (matches(loc->match, path))
211 8ad1c570 2021-05-09 op return loc->fcgi;
214 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
215 8ad1c570 2021-05-09 op return loc->fcgi;
219 1feaf2a6 2021-05-15 op vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
221 fdea6aa0 2021-04-30 op struct location *loc;
222 1feaf2a6 2021-05-15 op size_t l = 0;
224 fdea6aa0 2021-04-30 op if (v == NULL || path == NULL)
227 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
228 fdea6aa0 2021-04-30 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
230 fdea6aa0 2021-04-30 op if (loc->dirfd != -1)
231 1feaf2a6 2021-05-15 op if (matches(loc->match, path)) {
233 fdea6aa0 2021-04-30 op return loc->dirfd;
238 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
239 fdea6aa0 2021-04-30 op return loc->dirfd;
243 6abda252 2021-02-06 op vhost_strip(struct vhost *v, const char *path)
245 6abda252 2021-02-06 op struct location *loc;
247 6abda252 2021-02-06 op if (v == NULL || path == NULL)
250 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
251 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
252 cd761624 2021-02-06 op if (loc->strip != 0) {
253 49b73ba1 2021-02-10 op if (matches(loc->match, path))
254 6abda252 2021-02-06 op return loc->strip;
258 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
259 b8e64ccd 2021-03-31 op return loc->strip;
263 02be96c6 2021-02-09 op vhost_require_ca(struct vhost *v, const char *path)
265 02be96c6 2021-02-09 op struct location *loc;
267 02be96c6 2021-02-09 op if (v == NULL || path == NULL)
270 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
271 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
272 02be96c6 2021-02-09 op if (loc->reqca != NULL) {
273 49b73ba1 2021-02-10 op if (matches(loc->match, path))
274 02be96c6 2021-02-09 op return loc->reqca;
278 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
279 b8e64ccd 2021-03-31 op return loc->reqca;
283 793835cb 2021-02-23 op vhost_disable_log(struct vhost *v, const char *path)
285 793835cb 2021-02-23 op struct location *loc;
287 793835cb 2021-02-23 op if (v == NULL || path == NULL)
290 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
291 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
292 793835cb 2021-02-23 op if (loc->disable_log && matches(loc->match, path))
296 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
297 b8e64ccd 2021-03-31 op return loc->disable_log;
301 d3a08f4d 2021-01-17 op check_path(struct client *c, const char *path, int *fd)
303 d3a08f4d 2021-01-17 op struct stat sb;
304 d1ca3911 2021-01-21 op const char *p;
305 efb48052 2021-07-27 op int dirfd, strip;
307 d3a08f4d 2021-01-17 op assert(path != NULL);
310 fdea6aa0 2021-04-30 op * in send_dir we add an initial / (to be redirect-friendly),
311 fdea6aa0 2021-04-30 op * but here we want to skip it
313 fdea6aa0 2021-04-30 op if (*path == '/')
316 fdea6aa0 2021-04-30 op strip = vhost_strip(c->host, path);
317 fdea6aa0 2021-04-30 op p = strip_path(path, strip);
319 fdea6aa0 2021-04-30 op if (*p == '/')
321 fdea6aa0 2021-04-30 op if (*p == '\0')
324 1feaf2a6 2021-05-15 op dirfd = vhost_dirfd(c->host, path, &c->loc);
325 eae52ad4 2023-06-06 op log_debug("check_path: strip=%d path=%s original=%s",
326 fdea6aa0 2021-04-30 op strip, p, path);
327 3bd4a6de 2022-07-04 op if (*fd == -1 && (*fd = openat(dirfd, p, O_RDONLY)) == -1) {
328 3bd4a6de 2022-07-04 op if (errno == EACCES)
329 eae52ad4 2023-06-06 op log_info("can't open %s: %s", p, strerror(errno));
330 d3a08f4d 2021-01-17 op return FILE_MISSING;
333 d3a08f4d 2021-01-17 op if (fstat(*fd, &sb) == -1) {
334 eae52ad4 2023-06-06 op log_warn("fstat %s", path);
335 d3a08f4d 2021-01-17 op return FILE_MISSING;
338 d3a08f4d 2021-01-17 op if (S_ISDIR(sb.st_mode))
339 d3a08f4d 2021-01-17 op return FILE_DIRECTORY;
341 d3a08f4d 2021-01-17 op return FILE_EXISTS;
345 abc007d2 2021-02-08 op open_file(struct client *c)
347 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
348 d3a08f4d 2021-01-17 op case FILE_EXISTS:
349 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
350 27b2fa9a 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
353 d3a08f4d 2021-01-17 op case FILE_DIRECTORY:
357 d3a08f4d 2021-01-17 op case FILE_MISSING:
358 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
362 d3a08f4d 2021-01-17 op /* unreachable */
368 9b8f5ed2 2021-02-03 op mark_nonblock(int fd)
372 9b8f5ed2 2021-02-03 op if ((flags = fcntl(fd, F_GETFL)) == -1)
373 df5058c9 2023-06-05 op fatal("fcntl(F_GETFL)");
374 9b8f5ed2 2021-02-03 op if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
375 df5058c9 2023-06-05 op fatal("fcntl(F_SETFL)");
379 abc007d2 2021-02-08 op handle_handshake(int fd, short ev, void *d)
381 abc007d2 2021-02-08 op struct client *c = d;
382 d3a08f4d 2021-01-17 op struct vhost *h;
383 cc8c2901 2021-04-29 op struct alist *a;
384 d3a08f4d 2021-01-17 op const char *servname;
385 a8d4a897 2021-01-29 op const char *parse_err = "unknown error";
387 d3a08f4d 2021-01-17 op switch (tls_handshake(c->ctx)) {
388 d3a08f4d 2021-01-17 op case 0: /* success */
389 d3a08f4d 2021-01-17 op case -1: /* already handshaked */
391 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
392 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, handle_handshake, c, NULL);
394 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
395 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
398 d3a08f4d 2021-01-17 op /* unreachable */
402 80444938 2021-10-15 op c->bev = bufferevent_new(fd, client_read, client_write,
403 80444938 2021-10-15 op client_error, c);
404 80444938 2021-10-15 op if (c->bev == NULL)
405 df5058c9 2023-06-05 op fatal("%s: failed to allocate client buffer", __func__);
407 80444938 2021-10-15 op event_set(&c->bev->ev_read, c->fd, EV_READ,
408 80444938 2021-10-15 op client_tls_readcb, c->bev);
409 80444938 2021-10-15 op event_set(&c->bev->ev_write, c->fd, EV_WRITE,
410 80444938 2021-10-15 op client_tls_writecb, c->bev);
412 80444938 2021-10-15 op #if HAVE_LIBEVENT2
413 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->input, 0);
414 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->output, 1);
417 79288c8b 2021-09-24 op if ((servname = tls_conn_servername(c->ctx)) == NULL) {
418 eae52ad4 2023-06-06 op log_debug("handshake: missing SNI");
422 a8d4a897 2021-01-29 op if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
423 eae52ad4 2023-06-06 op log_info("puny_decode: %s", parse_err);
427 b8e64ccd 2021-03-31 op TAILQ_FOREACH(h, &hosts, vhosts) {
428 eecad7a3 2021-02-12 op if (matches(h->domain, c->domain))
430 cc8c2901 2021-04-29 op TAILQ_FOREACH(a, &h->aliases, aliases) {
431 cc8c2901 2021-04-29 op if (matches(a->alias, c->domain))
437 eae52ad4 2023-06-06 op log_debug("handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
438 3abf91b0 2021-02-07 op servname != NULL ? servname : "(null)",
440 b8e64ccd 2021-03-31 op h != NULL ? h->domain : "(null)");
442 b8e64ccd 2021-03-31 op if (h != NULL) {
444 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EV_READ);
449 abc007d2 2021-02-08 op start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
452 91b9f2a8 2021-05-15 op static const char *
453 91b9f2a8 2021-05-15 op strip_path(const char *path, int strip)
457 6abda252 2021-02-06 op while (strip > 0) {
458 6abda252 2021-02-06 op if ((t = strchr(path, '/')) == NULL) {
459 6abda252 2021-02-06 op path = strchr(path, '\0');
470 57ec3e77 2021-02-08 op fmt_sbuf(const char *fmt, struct client *c, const char *path)
473 4842c72d 2021-10-18 op char buf[32];
475 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
476 6abda252 2021-02-06 op for (i = 0; *fmt; ++fmt) {
477 6abda252 2021-02-06 op if (i == sizeof(buf)-1 || *fmt == '%') {
478 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
479 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
483 6abda252 2021-02-06 op if (*fmt != '%') {
484 6abda252 2021-02-06 op buf[i++] = *fmt;
488 6abda252 2021-02-06 op switch (*++fmt) {
490 6abda252 2021-02-06 op strlcat(c->sbuf, "%", sizeof(c->sbuf));
493 737a6b50 2021-04-30 op if (*path != '/')
494 737a6b50 2021-04-30 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
495 6abda252 2021-02-06 op strlcat(c->sbuf, path, sizeof(c->sbuf));
498 6abda252 2021-02-06 op strlcat(c->sbuf, c->iri.query, sizeof(c->sbuf));
501 6abda252 2021-02-06 op snprintf(buf, sizeof(buf), "%d", conf.port);
502 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
503 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
506 6abda252 2021-02-06 op strlcat(c->sbuf, c->domain, sizeof(c->sbuf));
509 df5058c9 2023-06-05 op fatalx("%s: unknown fmt specifier %c",
510 6abda252 2021-02-06 op __func__, *fmt);
515 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
518 57ec3e77 2021-02-08 op /* 1 if a matching `block return' (and apply it), 0 otherwise */
520 57ec3e77 2021-02-08 op apply_block_return(struct client *c)
522 57ec3e77 2021-02-08 op const char *fmt, *path;
525 57ec3e77 2021-02-08 op if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
528 57ec3e77 2021-02-08 op path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
529 57ec3e77 2021-02-08 op fmt_sbuf(fmt, c, path);
531 abc007d2 2021-02-08 op start_reply(c, code, c->sbuf);
535 b7967bc1 2022-01-02 op static struct proxy *
536 b7967bc1 2022-01-02 op matched_proxy(struct client *c)
538 b7967bc1 2022-01-02 op struct proxy *p;
539 b7967bc1 2022-01-02 op const char *proto;
540 b7967bc1 2022-01-02 op const char *host;
541 b7967bc1 2022-01-02 op const char *port;
543 b7967bc1 2022-01-02 op TAILQ_FOREACH(p, &c->host->proxies, proxies) {
544 534afd0d 2022-10-05 op if (*(proto = p->match_proto) == '\0')
545 b7967bc1 2022-01-02 op proto = "gemini";
546 534afd0d 2022-10-05 op if (*(host = p->match_host) == '\0')
548 534afd0d 2022-10-05 op if (*(port = p->match_port) == '\0')
551 b7967bc1 2022-01-02 op if (matches(proto, c->iri.schema) &&
552 b7967bc1 2022-01-02 op matches(host, c->domain) &&
553 b7967bc1 2022-01-02 op matches(port, c->iri.port))
561 ba94a608 2022-01-04 op check_matching_certificate(X509_STORE *store, struct client *c)
563 ba94a608 2022-01-04 op const uint8_t *cert;
566 ba94a608 2022-01-04 op if (!tls_peer_cert_provided(c->ctx)) {
567 ba94a608 2022-01-04 op start_reply(c, CLIENT_CERT_REQ, "client certificate required");
571 ba94a608 2022-01-04 op cert = tls_peer_cert_chain_pem(c->ctx, &len);
572 ba94a608 2022-01-04 op if (!validate_against_ca(store, cert, len)) {
573 ba94a608 2022-01-04 op start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
581 d29a2ee2 2022-09-06 op proxy_socket(struct client *c, const char *host, const char *port)
583 d29a2ee2 2022-09-06 op struct addrinfo hints, *res, *res0;
584 eae52ad4 2023-06-06 op int r, sock, save_errno;
585 eae52ad4 2023-06-06 op const char *cause = NULL;
587 d29a2ee2 2022-09-06 op memset(&hints, 0, sizeof(hints));
588 d29a2ee2 2022-09-06 op hints.ai_family = AF_UNSPEC;
589 d29a2ee2 2022-09-06 op hints.ai_socktype = SOCK_STREAM;
591 d29a2ee2 2022-09-06 op /* XXX: asr_run? :> */
592 d29a2ee2 2022-09-06 op r = getaddrinfo(host, port, &hints, &res0);
593 d29a2ee2 2022-09-06 op if (r != 0) {
594 eae52ad4 2023-06-06 op log_warnx("getaddrinfo(\"%s\", \"%s\"): %s",
595 d29a2ee2 2022-09-06 op host, port, gai_strerror(r));
599 d29a2ee2 2022-09-06 op for (res = res0; res; res = res->ai_next) {
600 d29a2ee2 2022-09-06 op sock = socket(res->ai_family, res->ai_socktype,
601 d29a2ee2 2022-09-06 op res->ai_protocol);
602 eae52ad4 2023-06-06 op if (sock == -1) {
603 eae52ad4 2023-06-06 op cause = "socket";
607 d29a2ee2 2022-09-06 op if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
608 eae52ad4 2023-06-06 op cause = "connect";
609 eae52ad4 2023-06-06 op save_errno = errno;
611 eae52ad4 2023-06-06 op errno = save_errno;
619 d29a2ee2 2022-09-06 op if (sock == -1)
620 eae52ad4 2023-06-06 op log_warn("can't connect to %s:%s: %s", host, port, cause);
622 eae52ad4 2023-06-06 op freeaddrinfo(res0);
627 72b033ef 2021-12-29 op /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
629 72b033ef 2021-12-29 op apply_reverse_proxy(struct client *c)
631 7bdcc91e 2022-01-01 op struct proxy *p;
633 b7967bc1 2022-01-02 op if ((p = matched_proxy(c)) == NULL)
636 b7967bc1 2022-01-02 op c->proxy = p;
638 ba94a608 2022-01-04 op if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
641 eae52ad4 2023-06-06 op log_debug("opening proxy connection for %s:%s",
642 7bdcc91e 2022-01-01 op p->host, p->port);
644 d29a2ee2 2022-09-06 op if ((c->pfd = proxy_socket(c, p->host, p->port)) == -1) {
645 d29a2ee2 2022-09-06 op start_reply(c, PROXY_ERROR, "proxy error");
649 d29a2ee2 2022-09-06 op mark_nonblock(c->pfd);
650 d29a2ee2 2022-09-06 op if (proxy_init(c) == -1)
651 d29a2ee2 2022-09-06 op start_reply(c, PROXY_ERROR, "proxy error");
657 d29a2ee2 2022-09-06 op fcgi_open_sock(struct fcgi *f)
659 d29a2ee2 2022-09-06 op struct sockaddr_un addr;
662 d29a2ee2 2022-09-06 op if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
663 eae52ad4 2023-06-06 op log_warn("socket");
667 d29a2ee2 2022-09-06 op memset(&addr, 0, sizeof(addr));
668 d29a2ee2 2022-09-06 op addr.sun_family = AF_UNIX;
669 d29a2ee2 2022-09-06 op strlcpy(addr.sun_path, f->path, sizeof(addr.sun_path));
671 d29a2ee2 2022-09-06 op if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
672 eae52ad4 2023-06-06 op log_warn("failed to connect to %s", f->path);
681 d29a2ee2 2022-09-06 op fcgi_open_conn(struct fcgi *f)
683 eae52ad4 2023-06-06 op struct addrinfo hints, *servinfo, *p;
684 eae52ad4 2023-06-06 op int r, sock, save_errno;
685 eae52ad4 2023-06-06 op const char *cause = NULL;
687 d29a2ee2 2022-09-06 op memset(&hints, 0, sizeof(hints));
688 d29a2ee2 2022-09-06 op hints.ai_family = AF_UNSPEC;
689 d29a2ee2 2022-09-06 op hints.ai_socktype = SOCK_STREAM;
690 d29a2ee2 2022-09-06 op hints.ai_flags = AI_ADDRCONFIG;
692 d29a2ee2 2022-09-06 op if ((r = getaddrinfo(f->path, f->port, &hints, &servinfo)) != 0) {
693 eae52ad4 2023-06-06 op log_warnx("getaddrinfo %s:%s: %s", f->path, f->port,
694 d29a2ee2 2022-09-06 op gai_strerror(r));
698 d29a2ee2 2022-09-06 op for (p = servinfo; p != NULL; p = p->ai_next) {
699 d29a2ee2 2022-09-06 op sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
700 eae52ad4 2023-06-06 op if (sock == -1) {
701 eae52ad4 2023-06-06 op cause = "socket";
704 d29a2ee2 2022-09-06 op if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
705 eae52ad4 2023-06-06 op cause = "connect";
706 eae52ad4 2023-06-06 op save_errno = errno;
708 eae52ad4 2023-06-06 op errno = save_errno;
714 d29a2ee2 2022-09-06 op if (p == NULL) {
715 eae52ad4 2023-06-06 op log_warn("couldn't connect to %s:%s: %s", f->path, f->port,
720 d29a2ee2 2022-09-06 op freeaddrinfo(servinfo);
724 8ad1c570 2021-05-09 op /* 1 if matching `fcgi' (and apply it), 0 otherwise */
726 8ad1c570 2021-05-09 op apply_fastcgi(struct client *c)
729 8ad1c570 2021-05-09 op struct fcgi *f;
731 8ad1c570 2021-05-09 op if ((id = vhost_fastcgi(c->host, c->iri.path)) == -1)
734 4cd25209 2021-10-07 op f = &fcgi[id];
736 eae52ad4 2023-06-06 op log_debug("opening fastcgi connection for (%s,%s)",
737 d29a2ee2 2022-09-06 op f->path, f->port);
739 eb4f96c1 2022-11-27 op if (*f->port == '\0')
740 d29a2ee2 2022-09-06 op c->pfd = fcgi_open_sock(f);
742 d29a2ee2 2022-09-06 op c->pfd = fcgi_open_conn(f);
744 d29a2ee2 2022-09-06 op if (c->pfd == -1) {
745 d29a2ee2 2022-09-06 op start_reply(c, CGI_ERROR, "CGI error");
749 d29a2ee2 2022-09-06 op mark_nonblock(c->pfd);
751 d29a2ee2 2022-09-06 op c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
752 d29a2ee2 2022-09-06 op fcgi_error, c);
753 d29a2ee2 2022-09-06 op if (c->cgibev == NULL) {
754 d29a2ee2 2022-09-06 op start_reply(c, TEMP_FAILURE, "internal server error");
758 d29a2ee2 2022-09-06 op bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
764 02be96c6 2021-02-09 op /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
766 02be96c6 2021-02-09 op apply_require_ca(struct client *c)
768 02be96c6 2021-02-09 op X509_STORE *store;
770 02be96c6 2021-02-09 op if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
772 ba94a608 2022-01-04 op return check_matching_certificate(store, c);
776 abc007d2 2021-02-08 op open_dir(struct client *c)
779 11c98667 2021-04-25 op int dirfd, root;
780 252908e6 2021-01-24 op char *before_file;
782 eae52ad4 2023-06-06 op log_debug("in open_dir");
784 11c98667 2021-04-25 op root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
786 0be51733 2021-01-20 op len = strlen(c->iri.path);
787 252908e6 2021-01-24 op if (len > 0 && !ends_with(c->iri.path, "/")) {
788 abc007d2 2021-02-08 op redirect_canonical_dir(c);
792 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
793 d1ca3911 2021-01-21 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
794 d1ca3911 2021-01-21 op if (!ends_with(c->sbuf, "/"))
795 0be51733 2021-01-20 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
796 252908e6 2021-01-24 op before_file = strchr(c->sbuf, '\0');
797 c8b74339 2021-01-24 op len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
798 c8b74339 2021-01-24 op sizeof(c->sbuf));
799 252908e6 2021-01-24 op if (len >= sizeof(c->sbuf)) {
800 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
804 252908e6 2021-01-24 op c->iri.path = c->sbuf;
806 252908e6 2021-01-24 op /* close later unless we have to generate the dir listing */
807 abc007d2 2021-02-08 op dirfd = c->pfd;
810 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
811 252908e6 2021-01-24 op case FILE_EXISTS:
812 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
813 98ee8406 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
816 252908e6 2021-01-24 op case FILE_DIRECTORY:
817 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
820 252908e6 2021-01-24 op case FILE_MISSING:
821 252908e6 2021-01-24 op *before_file = '\0';
823 252908e6 2021-01-24 op if (!vhost_auto_index(c->host, c->iri.path)) {
824 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
828 efe7d180 2021-10-02 op c->type = REQUEST_DIR;
830 e76f2c74 2021-04-25 op c->dirlen = scandir_fd(dirfd, &c->dir,
831 11c98667 2021-04-25 op root ? select_non_dotdot : select_non_dot,
833 11c98667 2021-04-25 op if (c->dirlen == -1) {
834 eae52ad4 2023-06-06 op log_warn("scandir_fd(%d) (vhost:%s) %s",
835 eae52ad4 2023-06-06 op c->pfd, c->host->domain, c->iri.path);
836 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
839 11c98667 2021-04-25 op c->diroff = 0;
842 4842c72d 2021-10-18 op start_reply(c, SUCCESS, "text/gemini");
843 efe7d180 2021-10-02 op evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
844 efe7d180 2021-10-02 op "# Index of %s\n\n", c->iri.path);
848 252908e6 2021-01-24 op /* unreachable */
852 252908e6 2021-01-24 op close(dirfd);
856 abc007d2 2021-02-08 op redirect_canonical_dir(struct client *c)
860 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
861 252908e6 2021-01-24 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
862 252908e6 2021-01-24 op len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
864 0be51733 2021-01-20 op if (len >= sizeof(c->sbuf)) {
865 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
869 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
873 efe7d180 2021-10-02 op client_tls_readcb(int fd, short event, void *d)
875 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
876 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
879 efe7d180 2021-10-02 op int what = EVBUFFER_READ;
880 efe7d180 2021-10-02 op int howmuch = IBUF_READ_SIZE;
881 efe7d180 2021-10-02 op char buf[IBUF_READ_SIZE];
883 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
884 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
888 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0)
889 efe7d180 2021-10-02 op howmuch = MIN(sizeof(buf), bufev->wm_read.high);
891 efe7d180 2021-10-02 op switch (ret = tls_read(client->ctx, buf, howmuch)) {
892 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
893 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
896 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
901 efe7d180 2021-10-02 op if (len == 0) {
902 efe7d180 2021-10-02 op what |= EVBUFFER_EOF;
906 efe7d180 2021-10-02 op if (evbuffer_add(bufev->input, buf, len) == -1) {
907 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
911 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
912 efe7d180 2021-10-02 op if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
914 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
916 efe7d180 2021-10-02 op * here we could implement a read pressure policy.
920 efe7d180 2021-10-02 op if (bufev->readcb != NULL)
921 efe7d180 2021-10-02 op (*bufev->readcb)(bufev, bufev->cbarg);
926 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
930 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
934 efe7d180 2021-10-02 op client_tls_writecb(int fd, short event, void *d)
936 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
937 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
940 efe7d180 2021-10-02 op short what = EVBUFFER_WRITE;
942 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
943 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
947 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0) {
948 efe7d180 2021-10-02 op ret = tls_write(client->ctx,
949 efe7d180 2021-10-02 op EVBUFFER_DATA(bufev->output),
950 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output));
951 efe7d180 2021-10-02 op switch (ret) {
952 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
953 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
956 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
960 efe7d180 2021-10-02 op evbuffer_drain(bufev->output, len);
963 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0)
964 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
966 efe7d180 2021-10-02 op if (bufev->writecb != NULL &&
967 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
968 efe7d180 2021-10-02 op (*bufev->writecb)(bufev, bufev->cbarg);
972 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
975 eae52ad4 2023-06-06 op log_warnx("tls error: %s", tls_error(client->ctx));
976 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
980 efe7d180 2021-10-02 op client_read(struct bufferevent *bev, void *d)
982 efe7d180 2021-10-02 op struct client *c = d;
983 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
984 efe7d180 2021-10-02 op const char *parse_err = "invalid request";
985 efe7d180 2021-10-02 op char decoded[DOMAIN_NAME_LEN];
988 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ);
991 901905e0 2022-01-05 op * libevent2 can still somehow call this function, even
992 901905e0 2022-01-05 op * though I never enable EV_READ in the bufferevent. If
993 901905e0 2022-01-05 op * that's the case, bail out.
995 901905e0 2022-01-05 op if (c->type != REQUEST_UNDECIDED)
998 efe7d180 2021-10-02 op /* max url len + \r\n */
999 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(src) > 1024 + 2) {
1000 eae52ad4 2023-06-06 op log_debug("too much data received");
1001 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "bad request");
1005 efe7d180 2021-10-02 op c->req = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
1006 efe7d180 2021-10-02 op if (c->req == NULL) {
1007 efe7d180 2021-10-02 op /* not enough data yet. */
1008 efe7d180 2021-10-02 op bufferevent_enable(bev, EVBUFFER_READ);
1011 ea27eaaa 2022-03-27 op c->reqlen = strlen(c->req);
1012 ea27eaaa 2022-03-27 op if (c->reqlen > 1024+2) {
1013 eae52ad4 2023-06-06 op log_debug("URL too long");
1014 ea27eaaa 2022-03-27 op start_reply(c, BAD_REQUEST, "bad request");
1018 efe7d180 2021-10-02 op if (!parse_iri(c->req, &c->iri, &parse_err) ||
1019 efe7d180 2021-10-02 op !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
1020 eae52ad4 2023-06-06 op log_debug("IRI parse error: %s", parse_err);
1021 807a80cb 2021-10-06 op start_reply(c, BAD_REQUEST, "bad request");
1025 72b033ef 2021-12-29 op if (apply_reverse_proxy(c))
1028 52c92ef6 2021-12-09 op /* ignore the port number */
1029 52c92ef6 2021-12-09 op if (strcmp(c->iri.schema, "gemini") ||
1030 efe7d180 2021-10-02 op strcmp(decoded, c->domain)) {
1031 efe7d180 2021-10-02 op start_reply(c, PROXY_REFUSED, "won't proxy request");
1035 efe7d180 2021-10-02 op if (apply_require_ca(c) ||
1036 efe7d180 2021-10-02 op apply_block_return(c)||
1037 efe7d180 2021-10-02 op apply_fastcgi(c))
1040 efe7d180 2021-10-02 op open_file(c);
1044 efe7d180 2021-10-02 op client_write(struct bufferevent *bev, void *d)
1046 efe7d180 2021-10-02 op struct client *c = d;
1047 efe7d180 2021-10-02 op struct evbuffer *out = EVBUFFER_OUTPUT(bev);
1048 f2f8eb35 2022-07-04 op char nam[PATH_MAX];
1049 efe7d180 2021-10-02 op char buf[BUFSIZ];
1052 efe7d180 2021-10-02 op switch (c->type) {
1053 efe7d180 2021-10-02 op case REQUEST_UNDECIDED:
1055 efe7d180 2021-10-02 op * Ignore spurious calls when we still don't have idea
1056 efe7d180 2021-10-02 op * what to do with the request.
1060 efe7d180 2021-10-02 op case REQUEST_FILE:
1061 efe7d180 2021-10-02 op if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1062 eae52ad4 2023-06-06 op log_warn("read");
1063 efe7d180 2021-10-02 op client_error(bev, EVBUFFER_ERROR, c);
1065 efe7d180 2021-10-02 op } else if (r == 0) {
1066 efe7d180 2021-10-02 op client_close(c);
1068 efe7d180 2021-10-02 op } else if (r != sizeof(buf))
1069 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1070 efe7d180 2021-10-02 op bufferevent_write(bev, buf, r);
1073 efe7d180 2021-10-02 op case REQUEST_DIR:
1074 efe7d180 2021-10-02 op /* TODO: handle big big directories better */
1075 efe7d180 2021-10-02 op for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1076 543f4a66 2022-07-04 op const char *sufx = "";
1078 f2f8eb35 2022-07-04 op encode_path(nam, sizeof(nam),
1079 efe7d180 2021-10-02 op c->dir[c->diroff]->d_name);
1080 543f4a66 2022-07-04 op if (c->dir[c->diroff]->d_type == DT_DIR)
1082 543f4a66 2022-07-04 op evbuffer_add_printf(out, "=> ./%s%s\n", nam, sufx);
1083 efe7d180 2021-10-02 op free(c->dir[c->diroff]);
1085 efe7d180 2021-10-02 op free(c->dir);
1086 efe7d180 2021-10-02 op c->dir = NULL;
1088 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1090 efe7d180 2021-10-02 op event_add(&c->bev->ev_write, NULL);
1093 efe7d180 2021-10-02 op case REQUEST_FCGI:
1094 72b033ef 2021-12-29 op case REQUEST_PROXY:
1096 d29a2ee2 2022-09-06 op * Here we depend on fastcgi or proxy connection to
1097 d29a2ee2 2022-09-06 op * provide data.
1101 efe7d180 2021-10-02 op case REQUEST_DONE:
1102 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(out) == 0)
1103 efe7d180 2021-10-02 op client_close(c);
1109 efe7d180 2021-10-02 op client_error(struct bufferevent *bev, short error, void *d)
1111 efe7d180 2021-10-02 op struct client *c = d;
1113 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1115 efe7d180 2021-10-02 op if (error & EVBUFFER_TIMEOUT) {
1116 eae52ad4 2023-06-06 op log_debug("timeout; forcefully closing the connection");
1117 efe7d180 2021-10-02 op if (c->code == 0)
1118 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "timeout");
1120 efe7d180 2021-10-02 op client_close(c);
1124 efe7d180 2021-10-02 op if (error & EVBUFFER_EOF) {
1125 efe7d180 2021-10-02 op client_close(c);
1129 eae52ad4 2023-06-06 op log_warnx("unknown bufferevent error 0x%x", error);
1130 efe7d180 2021-10-02 op client_close(c);
1134 efe7d180 2021-10-02 op start_reply(struct client *c, int code, const char *meta)
1136 efe7d180 2021-10-02 op struct evbuffer *evb = EVBUFFER_OUTPUT(c->bev);
1137 efe7d180 2021-10-02 op const char *lang;
1140 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EVBUFFER_WRITE);
1142 efe7d180 2021-10-02 op c->code = code;
1143 efe7d180 2021-10-02 op c->meta = meta;
1145 efe7d180 2021-10-02 op r = evbuffer_add_printf(evb, "%d %s", code, meta);
1146 efe7d180 2021-10-02 op if (r == -1)
1149 efe7d180 2021-10-02 op /* 2 digit status + space + 1024 max reply */
1150 efe7d180 2021-10-02 op if (r > 1027)
1151 efe7d180 2021-10-02 op goto overflow;
1153 d29a2ee2 2022-09-06 op if (c->type != REQUEST_FCGI &&
1154 72b033ef 2021-12-29 op c->type != REQUEST_PROXY &&
1155 efe7d180 2021-10-02 op !strcmp(meta, "text/gemini") &&
1156 efe7d180 2021-10-02 op (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1157 4842c72d 2021-10-18 op rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1158 efe7d180 2021-10-02 op if (rr == -1)
1160 efe7d180 2021-10-02 op if (r + rr > 1027)
1161 efe7d180 2021-10-02 op goto overflow;
1164 efe7d180 2021-10-02 op bufferevent_write(c->bev, "\r\n", 2);
1166 efe7d180 2021-10-02 op if (!vhost_disable_log(c->host, c->iri.path))
1167 efe7d180 2021-10-02 op log_request(c, EVBUFFER_DATA(evb), EVBUFFER_LENGTH(evb));
1169 d28bd963 2022-01-27 op if (code != 20)
1170 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1175 eae52ad4 2023-06-06 op log_warnx("evbuffer_add_printf error: no memory");
1176 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1177 efe7d180 2021-10-02 op client_close(c);
1181 eae52ad4 2023-06-06 op log_warnx("reply header overflow");
1182 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1183 efe7d180 2021-10-02 op start_reply(c, TEMP_FAILURE, "internal error");
1187 efe7d180 2021-10-02 op client_close_ev(int fd, short event, void *d)
1189 8ad1c570 2021-05-09 op struct client *c = d;
1191 d3a08f4d 2021-01-17 op switch (tls_close(c->ctx)) {
1192 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
1193 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1195 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
1196 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1200 d3a08f4d 2021-01-17 op connected_clients--;
1202 e4daebe4 2021-10-06 op free(c->req);
1204 d3a08f4d 2021-01-17 op tls_free(c->ctx);
1205 d3a08f4d 2021-01-17 op c->ctx = NULL;
1207 efe7d180 2021-10-02 op free(c->header);
1209 abc007d2 2021-02-08 op if (c->pfd != -1)
1210 abc007d2 2021-02-08 op close(c->pfd);
1212 252908e6 2021-01-24 op if (c->dir != NULL)
1213 11c98667 2021-04-25 op free(c->dir);
1215 abc007d2 2021-02-08 op close(c->fd);
1220 72b033ef 2021-12-29 op client_proxy_close(int fd, short event, void *d)
1222 72b033ef 2021-12-29 op struct tls *ctx = d;
1224 72b033ef 2021-12-29 op if (ctx == NULL) {
1229 72b033ef 2021-12-29 op switch (tls_close(ctx)) {
1230 72b033ef 2021-12-29 op case TLS_WANT_POLLIN:
1231 72b033ef 2021-12-29 op event_once(fd, EV_READ, client_proxy_close, d, NULL);
1233 72b033ef 2021-12-29 op case TLS_WANT_POLLOUT:
1234 72b033ef 2021-12-29 op event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1238 72b033ef 2021-12-29 op tls_free(ctx);
1243 efe7d180 2021-10-02 op client_close(struct client *c)
1246 efe7d180 2021-10-02 op * We may end up calling client_close in various situations
1247 efe7d180 2021-10-02 op * and for the most unexpected reasons. Therefore, we need to
1248 b9b77f53 2022-01-27 op * ensure that everything gets properly released once we reach
1249 efe7d180 2021-10-02 op * this point.
1252 207b3e80 2021-10-07 op SPLAY_REMOVE(client_tree_id, &clients, c);
1254 efe7d180 2021-10-02 op if (c->cgibev != NULL) {
1255 efe7d180 2021-10-02 op bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1256 efe7d180 2021-10-02 op bufferevent_free(c->cgibev);
1257 efe7d180 2021-10-02 op c->cgibev = NULL;
1258 efe7d180 2021-10-02 op close(c->pfd);
1259 efe7d180 2021-10-02 op c->pfd = -1;
1262 efe7d180 2021-10-02 op bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1263 efe7d180 2021-10-02 op bufferevent_free(c->bev);
1264 efe7d180 2021-10-02 op c->bev = NULL;
1266 e0f6dc64 2022-01-27 op if (c->proxyevset &&
1267 e0f6dc64 2022-01-27 op event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1268 e0f6dc64 2022-01-27 op c->proxyevset = 0;
1269 e0f6dc64 2022-01-27 op event_del(&c->proxyev);
1272 e0f6dc64 2022-01-27 op if (c->pfd != -1 && c->proxyctx != NULL) {
1273 e0f6dc64 2022-01-27 op /* shut down the proxy TLS connection */
1274 e0f6dc64 2022-01-27 op client_proxy_close(c->pfd, 0, c->proxyctx);
1275 e0f6dc64 2022-01-27 op c->pfd = -1;
1278 e0f6dc64 2022-01-27 op if (c->proxybev != NULL)
1279 e0f6dc64 2022-01-27 op bufferevent_free(c->proxybev);
1281 efe7d180 2021-10-02 op client_close_ev(c->fd, 0, c);
1285 abc007d2 2021-02-08 op do_accept(int sock, short et, void *d)
1287 abc007d2 2021-02-08 op struct client *c;
1288 d3a08f4d 2021-01-17 op struct sockaddr_storage addr;
1289 abc007d2 2021-02-08 op struct sockaddr *saddr;
1290 d3a08f4d 2021-01-17 op socklen_t len;
1293 abc007d2 2021-02-08 op saddr = (struct sockaddr*)&addr;
1294 d3a08f4d 2021-01-17 op len = sizeof(addr);
1295 3cb3dd4d 2021-02-12 op if ((fd = accept(sock, saddr, &len)) == -1) {
1296 c62a411f 2021-10-13 op if (errno == EWOULDBLOCK || errno == EAGAIN ||
1297 c62a411f 2021-10-13 op errno == ECONNABORTED)
1299 df5058c9 2023-06-05 op fatal("accept");
1302 3cb3dd4d 2021-02-12 op mark_nonblock(fd);
1304 207b3e80 2021-10-07 op c = xcalloc(1, sizeof(*c));
1305 207b3e80 2021-10-07 op c->id = ++server_client_id;
1307 207b3e80 2021-10-07 op c->pfd = -1;
1308 207b3e80 2021-10-07 op c->addr = addr;
1310 207b3e80 2021-10-07 op if (tls_accept_socket(ctx, &c->ctx, fd) == -1) {
1311 eae52ad4 2023-06-06 op log_warnx("failed to accept socket: %s", tls_error(c->ctx));
1312 207b3e80 2021-10-07 op close(c->fd);
1317 207b3e80 2021-10-07 op SPLAY_INSERT(client_tree_id, &clients, c);
1318 207b3e80 2021-10-07 op event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1319 207b3e80 2021-10-07 op connected_clients++;
1322 8ad1c570 2021-05-09 op struct client *
1323 3fdc457c 2022-03-26 op client_by_id(int id)
1325 207b3e80 2021-10-07 op struct client find;
1327 207b3e80 2021-10-07 op find.id = id;
1328 207b3e80 2021-10-07 op return SPLAY_FIND(client_tree_id, &clients, &find);
1332 d040746a 2022-09-10 op handle_dispatch_imsg(int fd, short ev, void *d)
1334 d040746a 2022-09-10 op struct imsgbuf *ibuf = d;
1335 d040746a 2022-09-10 op struct imsg imsg;
1338 d040746a 2022-09-10 op if ((n = imsg_read(ibuf)) == -1) {
1339 d040746a 2022-09-10 op if (errno == EAGAIN || errno == EWOULDBLOCK)
1341 d040746a 2022-09-10 op fatal("imsg_read");
1345 df5058c9 2023-06-05 op fatalx("connection closed.");
1348 d040746a 2022-09-10 op if ((n = imsg_get(ibuf, &imsg)) == -1)
1349 d040746a 2022-09-10 op fatal("imsg_get");
1353 d040746a 2022-09-10 op switch (imsg.hdr.type) {
1354 d040746a 2022-09-10 op case IMSG_QUIT:
1356 d040746a 2022-09-10 op * Don't call event_loopbreak since we want to
1357 d040746a 2022-09-10 op * finish handling the ongoing connections.
1359 d040746a 2022-09-10 op shutting_down = 1;
1361 d040746a 2022-09-10 op event_del(&e4);
1362 d040746a 2022-09-10 op if (has_ipv6)
1363 d040746a 2022-09-10 op event_del(&e6);
1364 d040746a 2022-09-10 op if (has_siginfo)
1365 d040746a 2022-09-10 op signal_del(&siginfo);
1366 d040746a 2022-09-10 op event_del(&imsgev);
1367 d040746a 2022-09-10 op signal_del(&sigusr2);
1370 df5058c9 2023-06-05 op fatalx("Unknown message %d", imsg.hdr.type);
1372 d040746a 2022-09-10 op imsg_free(&imsg);
1377 abc007d2 2021-02-08 op handle_siginfo(int fd, short ev, void *d)
1379 eae52ad4 2023-06-06 op log_info("%d connected clients", connected_clients);
1383 070b3295 2023-06-05 op loop(int sock4, int sock6, struct imsgbuf *ibuf)
1385 207b3e80 2021-10-07 op SPLAY_INIT(&clients);
1387 abc007d2 2021-02-08 op event_init();
1389 bc99d868 2021-03-19 op event_set(&e4, sock4, EV_READ | EV_PERSIST, &do_accept, NULL);
1390 a6e689d7 2021-02-12 op event_add(&e4, NULL);
1392 abc007d2 2021-02-08 op if (sock6 != -1) {
1393 a6e689d7 2021-02-12 op has_ipv6 = 1;
1394 bc99d868 2021-03-19 op event_set(&e6, sock6, EV_READ | EV_PERSIST, &do_accept, NULL);
1395 a6e689d7 2021-02-12 op event_add(&e6, NULL);
1399 0126d91d 2022-09-07 op event_set(&imsgev, ibuf->fd, EV_READ | EV_PERSIST,
1400 0126d91d 2022-09-07 op handle_dispatch_imsg, ibuf);
1401 0126d91d 2022-09-07 op event_add(&imsgev, NULL);
1404 abc007d2 2021-02-08 op #ifdef SIGINFO
1405 a6e689d7 2021-02-12 op has_siginfo = 1;
1406 a6e689d7 2021-02-12 op signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1407 a6e689d7 2021-02-12 op signal_add(&siginfo, NULL);
1409 5e3285d5 2021-02-12 op signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1410 a6e689d7 2021-02-12 op signal_add(&sigusr2, NULL);
1412 1e0b9745 2023-05-08 op sandbox_server_process();
1413 abc007d2 2021-02-08 op event_dispatch();
1418 070b3295 2023-06-05 op add_keypair(struct vhost *h, struct tls_config *conf)
1420 070b3295 2023-06-05 op if (*h->ocsp == '\0') {
1421 070b3295 2023-06-05 op if (tls_config_add_keypair_file(conf, h->cert, h->key) == -1)
1422 070b3295 2023-06-05 op fatalx("failed to load the keypair (%s, %s): %s",
1423 070b3295 2023-06-05 op h->cert, h->key, tls_config_error(conf));
1425 070b3295 2023-06-05 op if (tls_config_add_keypair_ocsp_file(conf, h->cert, h->key,
1426 070b3295 2023-06-05 op h->ocsp) == -1)
1427 070b3295 2023-06-05 op fatalx("failed to load the keypair (%s, %s, %s): %s",
1428 070b3295 2023-06-05 op h->cert, h->key, h->ocsp,
1429 070b3295 2023-06-05 op tls_config_error(conf));
1434 070b3295 2023-06-05 op * XXX: in a ideal privsep world, this is done by the parent process
1435 070b3295 2023-06-05 op * and its content sent to us.
1438 070b3295 2023-06-05 op setup_tls(void)
1440 070b3295 2023-06-05 op struct tls_config *tlsconf;
1441 070b3295 2023-06-05 op struct vhost *h;
1443 070b3295 2023-06-05 op if ((tlsconf = tls_config_new()) == NULL)
1444 070b3295 2023-06-05 op fatal("tls_config_new");
1446 070b3295 2023-06-05 op /* optionally accept client certs, but don't try to verify them */
1447 070b3295 2023-06-05 op tls_config_verify_client_optional(tlsconf);
1448 070b3295 2023-06-05 op tls_config_insecure_noverifycert(tlsconf);
1450 070b3295 2023-06-05 op if (tls_config_set_protocols(tlsconf, conf.protos) == -1)
1451 070b3295 2023-06-05 op fatalx("tls_config_set_protocols: %s",
1452 070b3295 2023-06-05 op tls_config_error(tlsconf));
1454 070b3295 2023-06-05 op h = TAILQ_FIRST(&hosts);
1456 eae52ad4 2023-06-06 op log_info("loading %s, %s, %s", h->cert, h->key, h->ocsp);
1458 070b3295 2023-06-05 op /* we need to set something, then we can add how many key we want */
1459 070b3295 2023-06-05 op if (tls_config_set_keypair_file(tlsconf, h->cert, h->key))
1460 070b3295 2023-06-05 op fatalx("tls_config_set_keypair_file failed for (%s, %s): %s",
1461 070b3295 2023-06-05 op h->cert, h->key, tls_config_error(tlsconf));
1463 070b3295 2023-06-05 op /* same for OCSP */
1464 070b3295 2023-06-05 op if (*h->ocsp != '\0' &&
1465 070b3295 2023-06-05 op tls_config_set_ocsp_staple_file(tlsconf, h->ocsp) == -1)
1466 070b3295 2023-06-05 op fatalx("tls_config_set_ocsp_staple_file failed for (%s): %s",
1467 070b3295 2023-06-05 op h->ocsp, tls_config_error(tlsconf));
1469 070b3295 2023-06-05 op while ((h = TAILQ_NEXT(h, vhosts)) != NULL)
1470 070b3295 2023-06-05 op add_keypair(h, tlsconf);
1472 070b3295 2023-06-05 op if ((ctx = tls_server()) == NULL)
1473 070b3295 2023-06-05 op fatal("tls_server failure");
1475 070b3295 2023-06-05 op if (tls_configure(ctx, tlsconf) == -1)
1476 070b3295 2023-06-05 op fatalx("tls_configure: %s", tls_error(ctx));
1478 070b3295 2023-06-05 op tls_config_free(tlsconf);
1482 a01a91db 2023-06-05 op load_vhosts(void)
1484 a01a91db 2023-06-05 op struct vhost *h;
1485 a01a91db 2023-06-05 op struct location *l;
1487 a01a91db 2023-06-05 op TAILQ_FOREACH(h, &hosts, vhosts) {
1488 a01a91db 2023-06-05 op TAILQ_FOREACH(l, &h->locations, locations) {
1489 a01a91db 2023-06-05 op if (*l->dir == '\0')
1491 a01a91db 2023-06-05 op l->dirfd = open(l->dir, O_RDONLY | O_DIRECTORY);
1492 a01a91db 2023-06-05 op if (l->dirfd == -1)
1493 df5058c9 2023-06-05 op fatal("open %s for domain %s", l->dir,
1500 070b3295 2023-06-05 op server_main(struct imsgbuf *ibuf, int sock4, int sock6)
1503 070b3295 2023-06-05 op * setup tls before dropping privileges: we don't want user
1504 070b3295 2023-06-05 op * to put private certs inside the chroot.
1506 070b3295 2023-06-05 op setup_tls();
1507 a01a91db 2023-06-05 op drop_priv();
1508 a01a91db 2023-06-05 op if (load_default_mime(&conf.mime) == -1)
1509 df5058c9 2023-06-05 op fatal("can't load default mime");
1510 a01a91db 2023-06-05 op sort_mime(&conf.mime);
1511 a01a91db 2023-06-05 op load_vhosts();
1512 070b3295 2023-06-05 op loop(sock4, sock6, ibuf);
1517 207b3e80 2021-10-07 op client_tree_cmp(struct client *a, struct client *b)
1519 207b3e80 2021-10-07 op if (a->id == b->id)
1521 207b3e80 2021-10-07 op else if (a->id < b->id)
1527 207b3e80 2021-10-07 op SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)