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 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 090b8a89 2021-07-06 op int shutting_down;
42 bc99d868 2021-03-19 op static struct tls *ctx;
44 c26f2460 2023-06-08 op static struct event siginfo, sigusr2;
45 c26f2460 2023-06-08 op static int has_siginfo;
47 d3a08f4d 2021-01-17 op int connected_clients;
49 49b73ba1 2021-02-10 op static inline int matches(const char*, const char*);
51 fe406389 2021-02-02 op static int check_path(struct client*, const char*, int*);
52 abc007d2 2021-02-08 op static void open_file(struct client*);
53 abc007d2 2021-02-08 op static void handle_handshake(int, short, void*);
54 91b9f2a8 2021-05-15 op static const char *strip_path(const char*, int);
55 57ec3e77 2021-02-08 op static void fmt_sbuf(const char*, struct client*, const char*);
56 abc007d2 2021-02-08 op static int apply_block_return(struct client*);
57 d474a979 2022-01-04 op static int check_matching_certificate(X509_STORE *, struct client *);
58 72b033ef 2021-12-29 op static int apply_reverse_proxy(struct client *);
59 efe7d180 2021-10-02 op static int apply_fastcgi(struct client*);
60 02be96c6 2021-02-09 op static int apply_require_ca(struct client*);
61 abc007d2 2021-02-08 op static void open_dir(struct client*);
62 abc007d2 2021-02-08 op static void redirect_canonical_dir(struct client*);
64 efe7d180 2021-10-02 op static void client_tls_readcb(int, short, void *);
65 efe7d180 2021-10-02 op static void client_tls_writecb(int, short, void *);
67 efe7d180 2021-10-02 op static void client_read(struct bufferevent *, void *);
68 efe7d180 2021-10-02 op void client_write(struct bufferevent *, void *);
69 efe7d180 2021-10-02 op static void client_error(struct bufferevent *, short, void *);
71 efe7d180 2021-10-02 op static void client_close_ev(int, short, void *);
73 bc99d868 2021-03-19 op static void handle_siginfo(int, short, void*);
75 c26f2460 2023-06-08 op static int server_dispatch_parent(int, struct privsep_proc *, struct imsg *);
76 c26f2460 2023-06-08 op static int server_dispatch_logger(int, struct privsep_proc *, struct imsg *);
78 c26f2460 2023-06-08 op static struct privsep_proc procs[] = {
79 c26f2460 2023-06-08 op { "parent", PROC_PARENT, server_dispatch_parent },
80 c26f2460 2023-06-08 op { "logger", PROC_LOGGER, server_dispatch_logger },
83 207b3e80 2021-10-07 op static uint32_t server_client_id;
85 207b3e80 2021-10-07 op struct client_tree_id clients;
87 49b73ba1 2021-02-10 op static inline int
88 49b73ba1 2021-02-10 op matches(const char *pattern, const char *path)
90 49b73ba1 2021-02-10 op if (*path == '/')
92 49b73ba1 2021-02-10 op return !fnmatch(pattern, path, 0);
96 c8b74339 2021-01-24 op vhost_lang(struct vhost *v, const char *path)
98 c8b74339 2021-01-24 op struct location *loc;
100 caad0308 2021-01-27 op if (v == NULL || path == NULL)
103 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
104 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
105 534afd0d 2022-10-05 op if (*loc->lang != '\0') {
106 49b73ba1 2021-02-10 op if (matches(loc->match, path))
107 6016a593 2021-01-30 op return loc->lang;
111 534afd0d 2022-10-05 op loc = TAILQ_FIRST(&v->locations);
112 534afd0d 2022-10-05 op if (*loc->lang == '\0')
114 534afd0d 2022-10-05 op return loc->lang;
118 c8b74339 2021-01-24 op vhost_default_mime(struct vhost *v, const char *path)
120 c8b74339 2021-01-24 op struct location *loc;
121 c8b74339 2021-01-24 op const char *default_mime = "application/octet-stream";
123 caad0308 2021-01-27 op if (v == NULL || path == NULL)
124 caad0308 2021-01-27 op return default_mime;
126 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
127 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
128 534afd0d 2022-10-05 op if (*loc->default_mime != '\0') {
129 49b73ba1 2021-02-10 op if (matches(loc->match, path))
130 6016a593 2021-01-30 op return loc->default_mime;
134 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
135 534afd0d 2022-10-05 op if (*loc->default_mime != '\0')
136 b8e64ccd 2021-03-31 op return loc->default_mime;
137 c8b74339 2021-01-24 op return default_mime;
141 c8b74339 2021-01-24 op vhost_index(struct vhost *v, const char *path)
143 c8b74339 2021-01-24 op struct location *loc;
144 c8b74339 2021-01-24 op const char *index = "index.gmi";
146 caad0308 2021-01-27 op if (v == NULL || path == NULL)
147 caad0308 2021-01-27 op return index;
149 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
150 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
151 534afd0d 2022-10-05 op if (*loc->index != '\0') {
152 49b73ba1 2021-02-10 op if (matches(loc->match, path))
153 6016a593 2021-01-30 op return loc->index;
157 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
158 534afd0d 2022-10-05 op if (*loc->index != '\0')
159 b8e64ccd 2021-03-31 op return loc->index;
160 c8b74339 2021-01-24 op return index;
164 252908e6 2021-01-24 op vhost_auto_index(struct vhost *v, const char *path)
166 252908e6 2021-01-24 op struct location *loc;
168 6016a593 2021-01-30 op if (v == NULL || path == NULL)
171 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
172 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
173 cd761624 2021-02-06 op if (loc->auto_index != 0) {
174 49b73ba1 2021-02-10 op if (matches(loc->match, path))
175 6016a593 2021-01-30 op return loc->auto_index == 1;
179 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
180 b8e64ccd 2021-03-31 op return loc->auto_index == 1;
184 6abda252 2021-02-06 op vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
186 6abda252 2021-02-06 op struct location *loc;
188 6abda252 2021-02-06 op if (v == NULL || path == NULL)
191 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
192 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
193 cd761624 2021-02-06 op if (loc->block_code != 0) {
194 49b73ba1 2021-02-10 op if (matches(loc->match, path)) {
195 6abda252 2021-02-06 op *code = loc->block_code;
196 6abda252 2021-02-06 op *fmt = loc->block_fmt;
202 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
203 b8e64ccd 2021-03-31 op *code = loc->block_code;
204 b8e64ccd 2021-03-31 op *fmt = loc->block_fmt;
205 b8e64ccd 2021-03-31 op return loc->block_code != 0;
209 8ad1c570 2021-05-09 op vhost_fastcgi(struct vhost *v, const char *path)
211 8ad1c570 2021-05-09 op struct location *loc;
213 8ad1c570 2021-05-09 op if (v == NULL || path == NULL)
216 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
217 8ad1c570 2021-05-09 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
218 8ad1c570 2021-05-09 op if (loc->fcgi != -1)
219 8ad1c570 2021-05-09 op if (matches(loc->match, path))
220 8ad1c570 2021-05-09 op return loc->fcgi;
223 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
224 8ad1c570 2021-05-09 op return loc->fcgi;
228 1feaf2a6 2021-05-15 op vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
230 fdea6aa0 2021-04-30 op struct location *loc;
231 1feaf2a6 2021-05-15 op size_t l = 0;
233 fdea6aa0 2021-04-30 op if (v == NULL || path == NULL)
236 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
237 fdea6aa0 2021-04-30 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
239 fdea6aa0 2021-04-30 op if (loc->dirfd != -1)
240 1feaf2a6 2021-05-15 op if (matches(loc->match, path)) {
242 fdea6aa0 2021-04-30 op return loc->dirfd;
247 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
248 fdea6aa0 2021-04-30 op return loc->dirfd;
252 6abda252 2021-02-06 op vhost_strip(struct vhost *v, const char *path)
254 6abda252 2021-02-06 op struct location *loc;
256 6abda252 2021-02-06 op if (v == NULL || path == NULL)
259 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
260 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
261 cd761624 2021-02-06 op if (loc->strip != 0) {
262 49b73ba1 2021-02-10 op if (matches(loc->match, path))
263 6abda252 2021-02-06 op return loc->strip;
267 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
268 b8e64ccd 2021-03-31 op return loc->strip;
272 02be96c6 2021-02-09 op vhost_require_ca(struct vhost *v, const char *path)
274 02be96c6 2021-02-09 op struct location *loc;
276 02be96c6 2021-02-09 op if (v == NULL || path == NULL)
279 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
280 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
281 02be96c6 2021-02-09 op if (loc->reqca != NULL) {
282 49b73ba1 2021-02-10 op if (matches(loc->match, path))
283 02be96c6 2021-02-09 op return loc->reqca;
287 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
288 b8e64ccd 2021-03-31 op return loc->reqca;
292 793835cb 2021-02-23 op vhost_disable_log(struct vhost *v, const char *path)
294 793835cb 2021-02-23 op struct location *loc;
296 793835cb 2021-02-23 op if (v == NULL || path == NULL)
299 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
300 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
301 793835cb 2021-02-23 op if (loc->disable_log && matches(loc->match, path))
305 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
306 b8e64ccd 2021-03-31 op return loc->disable_log;
310 d3a08f4d 2021-01-17 op check_path(struct client *c, const char *path, int *fd)
312 d3a08f4d 2021-01-17 op struct stat sb;
313 d1ca3911 2021-01-21 op const char *p;
314 efb48052 2021-07-27 op int dirfd, strip;
316 d3a08f4d 2021-01-17 op assert(path != NULL);
319 fdea6aa0 2021-04-30 op * in send_dir we add an initial / (to be redirect-friendly),
320 fdea6aa0 2021-04-30 op * but here we want to skip it
322 fdea6aa0 2021-04-30 op if (*path == '/')
325 fdea6aa0 2021-04-30 op strip = vhost_strip(c->host, path);
326 fdea6aa0 2021-04-30 op p = strip_path(path, strip);
328 fdea6aa0 2021-04-30 op if (*p == '/')
330 fdea6aa0 2021-04-30 op if (*p == '\0')
333 1feaf2a6 2021-05-15 op dirfd = vhost_dirfd(c->host, path, &c->loc);
334 eae52ad4 2023-06-06 op log_debug("check_path: strip=%d path=%s original=%s",
335 fdea6aa0 2021-04-30 op strip, p, path);
336 3bd4a6de 2022-07-04 op if (*fd == -1 && (*fd = openat(dirfd, p, O_RDONLY)) == -1) {
337 3bd4a6de 2022-07-04 op if (errno == EACCES)
338 eae52ad4 2023-06-06 op log_info("can't open %s: %s", p, strerror(errno));
339 d3a08f4d 2021-01-17 op return FILE_MISSING;
342 d3a08f4d 2021-01-17 op if (fstat(*fd, &sb) == -1) {
343 eae52ad4 2023-06-06 op log_warn("fstat %s", path);
344 d3a08f4d 2021-01-17 op return FILE_MISSING;
347 d3a08f4d 2021-01-17 op if (S_ISDIR(sb.st_mode))
348 d3a08f4d 2021-01-17 op return FILE_DIRECTORY;
350 d3a08f4d 2021-01-17 op return FILE_EXISTS;
354 abc007d2 2021-02-08 op open_file(struct client *c)
356 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
357 d3a08f4d 2021-01-17 op case FILE_EXISTS:
358 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
359 af1dab18 2023-06-09 op start_reply(c, SUCCESS, mime(c->conf, c->host, c->iri.path));
362 d3a08f4d 2021-01-17 op case FILE_DIRECTORY:
366 d3a08f4d 2021-01-17 op case FILE_MISSING:
367 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
371 d3a08f4d 2021-01-17 op /* unreachable */
377 9b8f5ed2 2021-02-03 op mark_nonblock(int fd)
381 9b8f5ed2 2021-02-03 op if ((flags = fcntl(fd, F_GETFL)) == -1)
382 df5058c9 2023-06-05 op fatal("fcntl(F_GETFL)");
383 9b8f5ed2 2021-02-03 op if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
384 df5058c9 2023-06-05 op fatal("fcntl(F_SETFL)");
388 abc007d2 2021-02-08 op handle_handshake(int fd, short ev, void *d)
390 abc007d2 2021-02-08 op struct client *c = d;
391 af1dab18 2023-06-09 op struct conf *conf = c->conf;
392 d3a08f4d 2021-01-17 op struct vhost *h;
393 cc8c2901 2021-04-29 op struct alist *a;
394 d3a08f4d 2021-01-17 op const char *servname;
395 a8d4a897 2021-01-29 op const char *parse_err = "unknown error";
397 d3a08f4d 2021-01-17 op switch (tls_handshake(c->ctx)) {
398 d3a08f4d 2021-01-17 op case 0: /* success */
399 d3a08f4d 2021-01-17 op case -1: /* already handshaked */
401 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
402 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, handle_handshake, c, NULL);
404 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
405 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
408 d3a08f4d 2021-01-17 op /* unreachable */
412 80444938 2021-10-15 op c->bev = bufferevent_new(fd, client_read, client_write,
413 80444938 2021-10-15 op client_error, c);
414 80444938 2021-10-15 op if (c->bev == NULL)
415 df5058c9 2023-06-05 op fatal("%s: failed to allocate client buffer", __func__);
417 80444938 2021-10-15 op event_set(&c->bev->ev_read, c->fd, EV_READ,
418 80444938 2021-10-15 op client_tls_readcb, c->bev);
419 80444938 2021-10-15 op event_set(&c->bev->ev_write, c->fd, EV_WRITE,
420 80444938 2021-10-15 op client_tls_writecb, c->bev);
422 80444938 2021-10-15 op #if HAVE_LIBEVENT2
423 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->input, 0);
424 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->output, 1);
427 79288c8b 2021-09-24 op if ((servname = tls_conn_servername(c->ctx)) == NULL) {
428 eae52ad4 2023-06-06 op log_debug("handshake: missing SNI");
432 a8d4a897 2021-01-29 op if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
433 eae52ad4 2023-06-06 op log_info("puny_decode: %s", parse_err);
437 af1dab18 2023-06-09 op TAILQ_FOREACH(h, &conf->hosts, vhosts) {
438 eecad7a3 2021-02-12 op if (matches(h->domain, c->domain))
440 cc8c2901 2021-04-29 op TAILQ_FOREACH(a, &h->aliases, aliases) {
441 cc8c2901 2021-04-29 op if (matches(a->alias, c->domain))
447 eae52ad4 2023-06-06 op log_debug("handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
448 3abf91b0 2021-02-07 op servname != NULL ? servname : "(null)",
450 b8e64ccd 2021-03-31 op h != NULL ? h->domain : "(null)");
452 b8e64ccd 2021-03-31 op if (h != NULL) {
454 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EV_READ);
459 abc007d2 2021-02-08 op start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
462 91b9f2a8 2021-05-15 op static const char *
463 91b9f2a8 2021-05-15 op strip_path(const char *path, int strip)
467 6abda252 2021-02-06 op while (strip > 0) {
468 6abda252 2021-02-06 op if ((t = strchr(path, '/')) == NULL) {
469 6abda252 2021-02-06 op path = strchr(path, '\0');
480 57ec3e77 2021-02-08 op fmt_sbuf(const char *fmt, struct client *c, const char *path)
482 af1dab18 2023-06-09 op struct conf *conf = c->conf;
484 4842c72d 2021-10-18 op char buf[32];
486 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
487 6abda252 2021-02-06 op for (i = 0; *fmt; ++fmt) {
488 6abda252 2021-02-06 op if (i == sizeof(buf)-1 || *fmt == '%') {
489 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
490 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
494 6abda252 2021-02-06 op if (*fmt != '%') {
495 6abda252 2021-02-06 op buf[i++] = *fmt;
499 6abda252 2021-02-06 op switch (*++fmt) {
501 6abda252 2021-02-06 op strlcat(c->sbuf, "%", sizeof(c->sbuf));
504 737a6b50 2021-04-30 op if (*path != '/')
505 737a6b50 2021-04-30 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
506 6abda252 2021-02-06 op strlcat(c->sbuf, path, sizeof(c->sbuf));
509 6abda252 2021-02-06 op strlcat(c->sbuf, c->iri.query, sizeof(c->sbuf));
512 af1dab18 2023-06-09 op snprintf(buf, sizeof(buf), "%d", conf->port);
513 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
514 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
517 6abda252 2021-02-06 op strlcat(c->sbuf, c->domain, sizeof(c->sbuf));
520 df5058c9 2023-06-05 op fatalx("%s: unknown fmt specifier %c",
521 6abda252 2021-02-06 op __func__, *fmt);
526 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
529 57ec3e77 2021-02-08 op /* 1 if a matching `block return' (and apply it), 0 otherwise */
531 57ec3e77 2021-02-08 op apply_block_return(struct client *c)
533 57ec3e77 2021-02-08 op const char *fmt, *path;
536 57ec3e77 2021-02-08 op if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
539 57ec3e77 2021-02-08 op path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
540 57ec3e77 2021-02-08 op fmt_sbuf(fmt, c, path);
542 abc007d2 2021-02-08 op start_reply(c, code, c->sbuf);
546 b7967bc1 2021-01-02 op static struct proxy *
547 b7967bc1 2021-01-02 op matched_proxy(struct client *c)
549 b7967bc1 2021-01-02 op struct proxy *p;
550 b7967bc1 2021-01-02 op const char *proto;
551 b7967bc1 2021-01-02 op const char *host;
552 b7967bc1 2021-01-02 op const char *port;
554 b7967bc1 2021-01-02 op TAILQ_FOREACH(p, &c->host->proxies, proxies) {
555 534afd0d 2022-10-05 op if (*(proto = p->match_proto) == '\0')
556 b7967bc1 2021-01-02 op proto = "gemini";
557 534afd0d 2022-10-05 op if (*(host = p->match_host) == '\0')
559 534afd0d 2022-10-05 op if (*(port = p->match_port) == '\0')
562 b7967bc1 2021-01-02 op if (matches(proto, c->iri.schema) &&
563 b7967bc1 2021-01-02 op matches(host, c->domain) &&
564 b7967bc1 2021-01-02 op matches(port, c->iri.port))
572 ba94a608 2022-01-04 op check_matching_certificate(X509_STORE *store, struct client *c)
574 ba94a608 2022-01-04 op const uint8_t *cert;
577 ba94a608 2022-01-04 op if (!tls_peer_cert_provided(c->ctx)) {
578 ba94a608 2022-01-04 op start_reply(c, CLIENT_CERT_REQ, "client certificate required");
582 ba94a608 2022-01-04 op cert = tls_peer_cert_chain_pem(c->ctx, &len);
583 ba94a608 2022-01-04 op if (!validate_against_ca(store, cert, len)) {
584 ba94a608 2022-01-04 op start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
592 d29a2ee2 2022-09-06 op proxy_socket(struct client *c, const char *host, const char *port)
594 d29a2ee2 2022-09-06 op struct addrinfo hints, *res, *res0;
595 eae52ad4 2023-06-06 op int r, sock, save_errno;
596 eae52ad4 2023-06-06 op const char *cause = NULL;
598 d29a2ee2 2022-09-06 op memset(&hints, 0, sizeof(hints));
599 d29a2ee2 2022-09-06 op hints.ai_family = AF_UNSPEC;
600 d29a2ee2 2022-09-06 op hints.ai_socktype = SOCK_STREAM;
602 d29a2ee2 2022-09-06 op /* XXX: asr_run? :> */
603 d29a2ee2 2022-09-06 op r = getaddrinfo(host, port, &hints, &res0);
604 d29a2ee2 2022-09-06 op if (r != 0) {
605 eae52ad4 2023-06-06 op log_warnx("getaddrinfo(\"%s\", \"%s\"): %s",
606 d29a2ee2 2022-09-06 op host, port, gai_strerror(r));
610 d29a2ee2 2022-09-06 op for (res = res0; res; res = res->ai_next) {
611 d29a2ee2 2022-09-06 op sock = socket(res->ai_family, res->ai_socktype,
612 d29a2ee2 2022-09-06 op res->ai_protocol);
613 eae52ad4 2023-06-06 op if (sock == -1) {
614 eae52ad4 2023-06-06 op cause = "socket";
618 d29a2ee2 2022-09-06 op if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
619 eae52ad4 2023-06-06 op cause = "connect";
620 eae52ad4 2023-06-06 op save_errno = errno;
622 eae52ad4 2023-06-06 op errno = save_errno;
630 d29a2ee2 2022-09-06 op if (sock == -1)
631 eae52ad4 2023-06-06 op log_warn("can't connect to %s:%s: %s", host, port, cause);
633 eae52ad4 2023-06-06 op freeaddrinfo(res0);
638 72b033ef 2021-12-29 op /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
640 72b033ef 2021-12-29 op apply_reverse_proxy(struct client *c)
642 7bdcc91e 2021-01-01 op struct proxy *p;
644 b7967bc1 2021-01-02 op if ((p = matched_proxy(c)) == NULL)
647 b7967bc1 2021-01-02 op c->proxy = p;
649 ba94a608 2022-01-04 op if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
652 eae52ad4 2023-06-06 op log_debug("opening proxy connection for %s:%s",
653 7bdcc91e 2021-01-01 op p->host, p->port);
655 d29a2ee2 2022-09-06 op if ((c->pfd = proxy_socket(c, p->host, p->port)) == -1) {
656 d29a2ee2 2022-09-06 op start_reply(c, PROXY_ERROR, "proxy error");
660 d29a2ee2 2022-09-06 op mark_nonblock(c->pfd);
661 d29a2ee2 2022-09-06 op if (proxy_init(c) == -1)
662 d29a2ee2 2022-09-06 op start_reply(c, PROXY_ERROR, "proxy error");
668 d29a2ee2 2022-09-06 op fcgi_open_sock(struct fcgi *f)
670 d29a2ee2 2022-09-06 op struct sockaddr_un addr;
673 d29a2ee2 2022-09-06 op if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
674 eae52ad4 2023-06-06 op log_warn("socket");
678 d29a2ee2 2022-09-06 op memset(&addr, 0, sizeof(addr));
679 d29a2ee2 2022-09-06 op addr.sun_family = AF_UNIX;
680 d29a2ee2 2022-09-06 op strlcpy(addr.sun_path, f->path, sizeof(addr.sun_path));
682 d29a2ee2 2022-09-06 op if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
683 eae52ad4 2023-06-06 op log_warn("failed to connect to %s", f->path);
692 d29a2ee2 2022-09-06 op fcgi_open_conn(struct fcgi *f)
694 eae52ad4 2023-06-06 op struct addrinfo hints, *servinfo, *p;
695 eae52ad4 2023-06-06 op int r, sock, save_errno;
696 eae52ad4 2023-06-06 op const char *cause = NULL;
698 d29a2ee2 2022-09-06 op memset(&hints, 0, sizeof(hints));
699 d29a2ee2 2022-09-06 op hints.ai_family = AF_UNSPEC;
700 d29a2ee2 2022-09-06 op hints.ai_socktype = SOCK_STREAM;
701 d29a2ee2 2022-09-06 op hints.ai_flags = AI_ADDRCONFIG;
703 d29a2ee2 2022-09-06 op if ((r = getaddrinfo(f->path, f->port, &hints, &servinfo)) != 0) {
704 eae52ad4 2023-06-06 op log_warnx("getaddrinfo %s:%s: %s", f->path, f->port,
705 d29a2ee2 2022-09-06 op gai_strerror(r));
709 d29a2ee2 2022-09-06 op for (p = servinfo; p != NULL; p = p->ai_next) {
710 d29a2ee2 2022-09-06 op sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
711 eae52ad4 2023-06-06 op if (sock == -1) {
712 eae52ad4 2023-06-06 op cause = "socket";
715 d29a2ee2 2022-09-06 op if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
716 eae52ad4 2023-06-06 op cause = "connect";
717 eae52ad4 2023-06-06 op save_errno = errno;
719 eae52ad4 2023-06-06 op errno = save_errno;
725 d29a2ee2 2022-09-06 op if (p == NULL) {
726 eae52ad4 2023-06-06 op log_warn("couldn't connect to %s:%s: %s", f->path, f->port,
731 d29a2ee2 2022-09-06 op freeaddrinfo(servinfo);
735 8ad1c570 2021-05-09 op /* 1 if matching `fcgi' (and apply it), 0 otherwise */
737 8ad1c570 2021-05-09 op apply_fastcgi(struct client *c)
739 5d22294a 2023-06-09 op int id, i = 0;
740 8ad1c570 2021-05-09 op struct fcgi *f;
742 8ad1c570 2021-05-09 op if ((id = vhost_fastcgi(c->host, c->iri.path)) == -1)
745 af1dab18 2023-06-09 op TAILQ_FOREACH(f, &c->conf->fcgi, fcgi) {
751 5d22294a 2023-06-09 op if (f == NULL) {
752 5d22294a 2023-06-09 op log_warnx("can't find fcgi #%d", id);
756 eae52ad4 2023-06-06 op log_debug("opening fastcgi connection for (%s,%s)",
757 d29a2ee2 2022-09-06 op f->path, f->port);
759 eb4f96c1 2022-11-27 op if (*f->port == '\0')
760 d29a2ee2 2022-09-06 op c->pfd = fcgi_open_sock(f);
762 d29a2ee2 2022-09-06 op c->pfd = fcgi_open_conn(f);
764 d29a2ee2 2022-09-06 op if (c->pfd == -1) {
765 d29a2ee2 2022-09-06 op start_reply(c, CGI_ERROR, "CGI error");
769 d29a2ee2 2022-09-06 op mark_nonblock(c->pfd);
771 d29a2ee2 2022-09-06 op c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
772 d29a2ee2 2022-09-06 op fcgi_error, c);
773 d29a2ee2 2022-09-06 op if (c->cgibev == NULL) {
774 d29a2ee2 2022-09-06 op start_reply(c, TEMP_FAILURE, "internal server error");
778 d29a2ee2 2022-09-06 op bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
784 02be96c6 2021-02-09 op /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
786 02be96c6 2021-02-09 op apply_require_ca(struct client *c)
788 02be96c6 2021-02-09 op X509_STORE *store;
790 02be96c6 2021-02-09 op if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
792 ba94a608 2022-01-04 op return check_matching_certificate(store, c);
796 abc007d2 2021-02-08 op open_dir(struct client *c)
799 11c98667 2021-04-25 op int dirfd, root;
800 252908e6 2021-01-24 op char *before_file;
802 eae52ad4 2023-06-06 op log_debug("in open_dir");
804 11c98667 2021-04-25 op root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
806 0be51733 2021-01-20 op len = strlen(c->iri.path);
807 252908e6 2021-01-24 op if (len > 0 && !ends_with(c->iri.path, "/")) {
808 abc007d2 2021-02-08 op redirect_canonical_dir(c);
812 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
813 d1ca3911 2021-01-21 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
814 d1ca3911 2021-01-21 op if (!ends_with(c->sbuf, "/"))
815 0be51733 2021-01-20 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
816 252908e6 2021-01-24 op before_file = strchr(c->sbuf, '\0');
817 c8b74339 2021-01-24 op len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
818 c8b74339 2021-01-24 op sizeof(c->sbuf));
819 252908e6 2021-01-24 op if (len >= sizeof(c->sbuf)) {
820 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
824 252908e6 2021-01-24 op c->iri.path = c->sbuf;
826 252908e6 2021-01-24 op /* close later unless we have to generate the dir listing */
827 abc007d2 2021-02-08 op dirfd = c->pfd;
830 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
831 252908e6 2021-01-24 op case FILE_EXISTS:
832 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
833 af1dab18 2023-06-09 op start_reply(c, SUCCESS, mime(c->conf, c->host, c->iri.path));
836 252908e6 2021-01-24 op case FILE_DIRECTORY:
837 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
840 252908e6 2021-01-24 op case FILE_MISSING:
841 252908e6 2021-01-24 op *before_file = '\0';
843 252908e6 2021-01-24 op if (!vhost_auto_index(c->host, c->iri.path)) {
844 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
848 efe7d180 2021-10-02 op c->type = REQUEST_DIR;
850 e76f2c74 2021-04-25 op c->dirlen = scandir_fd(dirfd, &c->dir,
851 11c98667 2021-04-25 op root ? select_non_dotdot : select_non_dot,
853 11c98667 2021-04-25 op if (c->dirlen == -1) {
854 eae52ad4 2023-06-06 op log_warn("scandir_fd(%d) (vhost:%s) %s",
855 eae52ad4 2023-06-06 op c->pfd, c->host->domain, c->iri.path);
856 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
859 11c98667 2021-04-25 op c->diroff = 0;
862 4842c72d 2021-10-18 op start_reply(c, SUCCESS, "text/gemini");
863 efe7d180 2021-10-02 op evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
864 efe7d180 2021-10-02 op "# Index of %s\n\n", c->iri.path);
868 252908e6 2021-01-24 op /* unreachable */
872 252908e6 2021-01-24 op close(dirfd);
876 abc007d2 2021-02-08 op redirect_canonical_dir(struct client *c)
880 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
881 252908e6 2021-01-24 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
882 252908e6 2021-01-24 op len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
884 0be51733 2021-01-20 op if (len >= sizeof(c->sbuf)) {
885 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
889 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
893 efe7d180 2021-10-02 op client_tls_readcb(int fd, short event, void *d)
895 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
896 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
899 efe7d180 2021-10-02 op int what = EVBUFFER_READ;
900 efe7d180 2021-10-02 op int howmuch = IBUF_READ_SIZE;
901 efe7d180 2021-10-02 op char buf[IBUF_READ_SIZE];
903 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
904 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
908 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0)
909 efe7d180 2021-10-02 op howmuch = MIN(sizeof(buf), bufev->wm_read.high);
911 efe7d180 2021-10-02 op switch (ret = tls_read(client->ctx, buf, howmuch)) {
912 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
913 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
916 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
921 efe7d180 2021-10-02 op if (len == 0) {
922 efe7d180 2021-10-02 op what |= EVBUFFER_EOF;
926 efe7d180 2021-10-02 op if (evbuffer_add(bufev->input, buf, len) == -1) {
927 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
931 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
932 efe7d180 2021-10-02 op if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
934 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
936 efe7d180 2021-10-02 op * here we could implement a read pressure policy.
940 efe7d180 2021-10-02 op if (bufev->readcb != NULL)
941 efe7d180 2021-10-02 op (*bufev->readcb)(bufev, bufev->cbarg);
946 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
950 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
954 efe7d180 2021-10-02 op client_tls_writecb(int fd, short event, void *d)
956 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
957 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
960 efe7d180 2021-10-02 op short what = EVBUFFER_WRITE;
962 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
963 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
967 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0) {
968 efe7d180 2021-10-02 op ret = tls_write(client->ctx,
969 efe7d180 2021-10-02 op EVBUFFER_DATA(bufev->output),
970 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output));
971 efe7d180 2021-10-02 op switch (ret) {
972 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
973 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
976 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
980 efe7d180 2021-10-02 op evbuffer_drain(bufev->output, len);
983 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0)
984 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
986 efe7d180 2021-10-02 op if (bufev->writecb != NULL &&
987 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
988 efe7d180 2021-10-02 op (*bufev->writecb)(bufev, bufev->cbarg);
992 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
995 eae52ad4 2023-06-06 op log_warnx("tls error: %s", tls_error(client->ctx));
996 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
1000 efe7d180 2021-10-02 op client_read(struct bufferevent *bev, void *d)
1002 efe7d180 2021-10-02 op struct client *c = d;
1003 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
1004 efe7d180 2021-10-02 op const char *parse_err = "invalid request";
1005 efe7d180 2021-10-02 op char decoded[DOMAIN_NAME_LEN];
1008 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ);
1011 901905e0 2022-01-05 op * libevent2 can still somehow call this function, even
1012 901905e0 2022-01-05 op * though I never enable EV_READ in the bufferevent. If
1013 901905e0 2022-01-05 op * that's the case, bail out.
1015 901905e0 2022-01-05 op if (c->type != REQUEST_UNDECIDED)
1018 efe7d180 2021-10-02 op /* max url len + \r\n */
1019 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(src) > 1024 + 2) {
1020 eae52ad4 2023-06-06 op log_debug("too much data received");
1021 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "bad request");
1025 efe7d180 2021-10-02 op c->req = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
1026 efe7d180 2021-10-02 op if (c->req == NULL) {
1027 efe7d180 2021-10-02 op /* not enough data yet. */
1028 efe7d180 2021-10-02 op bufferevent_enable(bev, EVBUFFER_READ);
1031 ea27eaaa 2022-03-27 op c->reqlen = strlen(c->req);
1032 ea27eaaa 2022-03-27 op if (c->reqlen > 1024+2) {
1033 eae52ad4 2023-06-06 op log_debug("URL too long");
1034 ea27eaaa 2022-03-27 op start_reply(c, BAD_REQUEST, "bad request");
1038 efe7d180 2021-10-02 op if (!parse_iri(c->req, &c->iri, &parse_err) ||
1039 efe7d180 2021-10-02 op !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
1040 eae52ad4 2023-06-06 op log_debug("IRI parse error: %s", parse_err);
1041 807a80cb 2021-10-06 op start_reply(c, BAD_REQUEST, "bad request");
1045 72b033ef 2021-12-29 op if (apply_reverse_proxy(c))
1048 52c92ef6 2021-12-09 op /* ignore the port number */
1049 52c92ef6 2021-12-09 op if (strcmp(c->iri.schema, "gemini") ||
1050 efe7d180 2021-10-02 op strcmp(decoded, c->domain)) {
1051 efe7d180 2021-10-02 op start_reply(c, PROXY_REFUSED, "won't proxy request");
1055 efe7d180 2021-10-02 op if (apply_require_ca(c) ||
1056 efe7d180 2021-10-02 op apply_block_return(c)||
1057 efe7d180 2021-10-02 op apply_fastcgi(c))
1060 efe7d180 2021-10-02 op open_file(c);
1064 efe7d180 2021-10-02 op client_write(struct bufferevent *bev, void *d)
1066 efe7d180 2021-10-02 op struct client *c = d;
1067 efe7d180 2021-10-02 op struct evbuffer *out = EVBUFFER_OUTPUT(bev);
1068 f2f8eb35 2022-07-04 op char nam[PATH_MAX];
1069 efe7d180 2021-10-02 op char buf[BUFSIZ];
1072 efe7d180 2021-10-02 op switch (c->type) {
1073 efe7d180 2021-10-02 op case REQUEST_UNDECIDED:
1075 efe7d180 2021-10-02 op * Ignore spurious calls when we still don't have idea
1076 efe7d180 2021-10-02 op * what to do with the request.
1080 efe7d180 2021-10-02 op case REQUEST_FILE:
1081 efe7d180 2021-10-02 op if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1082 eae52ad4 2023-06-06 op log_warn("read");
1083 efe7d180 2021-10-02 op client_error(bev, EVBUFFER_ERROR, c);
1085 efe7d180 2021-10-02 op } else if (r == 0) {
1086 efe7d180 2021-10-02 op client_close(c);
1088 efe7d180 2021-10-02 op } else if (r != sizeof(buf))
1089 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1090 efe7d180 2021-10-02 op bufferevent_write(bev, buf, r);
1093 efe7d180 2021-10-02 op case REQUEST_DIR:
1094 efe7d180 2021-10-02 op /* TODO: handle big big directories better */
1095 efe7d180 2021-10-02 op for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1096 543f4a66 2022-07-04 op const char *sufx = "";
1098 f2f8eb35 2022-07-04 op encode_path(nam, sizeof(nam),
1099 efe7d180 2021-10-02 op c->dir[c->diroff]->d_name);
1100 543f4a66 2022-07-04 op if (c->dir[c->diroff]->d_type == DT_DIR)
1102 543f4a66 2022-07-04 op evbuffer_add_printf(out, "=> ./%s%s\n", nam, sufx);
1103 efe7d180 2021-10-02 op free(c->dir[c->diroff]);
1105 efe7d180 2021-10-02 op free(c->dir);
1106 efe7d180 2021-10-02 op c->dir = NULL;
1108 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1110 efe7d180 2021-10-02 op event_add(&c->bev->ev_write, NULL);
1113 efe7d180 2021-10-02 op case REQUEST_FCGI:
1114 72b033ef 2021-12-29 op case REQUEST_PROXY:
1116 d29a2ee2 2022-09-06 op * Here we depend on fastcgi or proxy connection to
1117 d29a2ee2 2022-09-06 op * provide data.
1121 efe7d180 2021-10-02 op case REQUEST_DONE:
1122 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(out) == 0)
1123 efe7d180 2021-10-02 op client_close(c);
1129 efe7d180 2021-10-02 op client_error(struct bufferevent *bev, short error, void *d)
1131 efe7d180 2021-10-02 op struct client *c = d;
1133 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1135 efe7d180 2021-10-02 op if (error & EVBUFFER_TIMEOUT) {
1136 eae52ad4 2023-06-06 op log_debug("timeout; forcefully closing the connection");
1137 efe7d180 2021-10-02 op if (c->code == 0)
1138 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "timeout");
1140 efe7d180 2021-10-02 op client_close(c);
1144 efe7d180 2021-10-02 op if (error & EVBUFFER_EOF) {
1145 efe7d180 2021-10-02 op client_close(c);
1149 eae52ad4 2023-06-06 op log_warnx("unknown bufferevent error 0x%x", error);
1150 efe7d180 2021-10-02 op client_close(c);
1154 efe7d180 2021-10-02 op start_reply(struct client *c, int code, const char *meta)
1156 efe7d180 2021-10-02 op struct evbuffer *evb = EVBUFFER_OUTPUT(c->bev);
1157 efe7d180 2021-10-02 op const char *lang;
1160 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EVBUFFER_WRITE);
1162 efe7d180 2021-10-02 op c->code = code;
1163 efe7d180 2021-10-02 op c->meta = meta;
1165 efe7d180 2021-10-02 op r = evbuffer_add_printf(evb, "%d %s", code, meta);
1166 efe7d180 2021-10-02 op if (r == -1)
1169 efe7d180 2021-10-02 op /* 2 digit status + space + 1024 max reply */
1170 efe7d180 2021-10-02 op if (r > 1027)
1171 efe7d180 2021-10-02 op goto overflow;
1173 d29a2ee2 2022-09-06 op if (c->type != REQUEST_FCGI &&
1174 72b033ef 2021-12-29 op c->type != REQUEST_PROXY &&
1175 efe7d180 2021-10-02 op !strcmp(meta, "text/gemini") &&
1176 efe7d180 2021-10-02 op (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1177 4842c72d 2021-10-18 op rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1178 efe7d180 2021-10-02 op if (rr == -1)
1180 efe7d180 2021-10-02 op if (r + rr > 1027)
1181 efe7d180 2021-10-02 op goto overflow;
1184 efe7d180 2021-10-02 op bufferevent_write(c->bev, "\r\n", 2);
1186 efe7d180 2021-10-02 op if (!vhost_disable_log(c->host, c->iri.path))
1187 efe7d180 2021-10-02 op log_request(c, EVBUFFER_DATA(evb), EVBUFFER_LENGTH(evb));
1189 d28bd963 2022-01-27 op if (code != 20)
1190 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1195 eae52ad4 2023-06-06 op log_warnx("evbuffer_add_printf error: no memory");
1196 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1197 efe7d180 2021-10-02 op client_close(c);
1201 eae52ad4 2023-06-06 op log_warnx("reply header overflow");
1202 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1203 efe7d180 2021-10-02 op start_reply(c, TEMP_FAILURE, "internal error");
1207 efe7d180 2021-10-02 op client_close_ev(int fd, short event, void *d)
1209 8ad1c570 2021-05-09 op struct client *c = d;
1211 d3a08f4d 2021-01-17 op switch (tls_close(c->ctx)) {
1212 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
1213 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1215 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
1216 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1220 d3a08f4d 2021-01-17 op connected_clients--;
1222 e4daebe4 2021-10-06 op free(c->req);
1224 d3a08f4d 2021-01-17 op tls_free(c->ctx);
1225 d3a08f4d 2021-01-17 op c->ctx = NULL;
1227 efe7d180 2021-10-02 op free(c->header);
1229 abc007d2 2021-02-08 op if (c->pfd != -1)
1230 abc007d2 2021-02-08 op close(c->pfd);
1232 252908e6 2021-01-24 op if (c->dir != NULL)
1233 11c98667 2021-04-25 op free(c->dir);
1235 abc007d2 2021-02-08 op close(c->fd);
1240 72b033ef 2021-12-29 op client_proxy_close(int fd, short event, void *d)
1242 72b033ef 2021-12-29 op struct tls *ctx = d;
1244 72b033ef 2021-12-29 op if (ctx == NULL) {
1249 72b033ef 2021-12-29 op switch (tls_close(ctx)) {
1250 72b033ef 2021-12-29 op case TLS_WANT_POLLIN:
1251 72b033ef 2021-12-29 op event_once(fd, EV_READ, client_proxy_close, d, NULL);
1253 72b033ef 2021-12-29 op case TLS_WANT_POLLOUT:
1254 72b033ef 2021-12-29 op event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1258 72b033ef 2021-12-29 op tls_free(ctx);
1263 efe7d180 2021-10-02 op client_close(struct client *c)
1266 efe7d180 2021-10-02 op * We may end up calling client_close in various situations
1267 efe7d180 2021-10-02 op * and for the most unexpected reasons. Therefore, we need to
1268 b9b77f53 2022-01-27 op * ensure that everything gets properly released once we reach
1269 efe7d180 2021-10-02 op * this point.
1272 207b3e80 2021-10-07 op SPLAY_REMOVE(client_tree_id, &clients, c);
1274 efe7d180 2021-10-02 op if (c->cgibev != NULL) {
1275 efe7d180 2021-10-02 op bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1276 efe7d180 2021-10-02 op bufferevent_free(c->cgibev);
1277 efe7d180 2021-10-02 op c->cgibev = NULL;
1278 efe7d180 2021-10-02 op close(c->pfd);
1279 efe7d180 2021-10-02 op c->pfd = -1;
1282 efe7d180 2021-10-02 op bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1283 efe7d180 2021-10-02 op bufferevent_free(c->bev);
1284 efe7d180 2021-10-02 op c->bev = NULL;
1286 e0f6dc64 2022-01-27 op if (c->proxyevset &&
1287 e0f6dc64 2022-01-27 op event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1288 e0f6dc64 2022-01-27 op c->proxyevset = 0;
1289 e0f6dc64 2022-01-27 op event_del(&c->proxyev);
1292 e0f6dc64 2022-01-27 op if (c->pfd != -1 && c->proxyctx != NULL) {
1293 e0f6dc64 2022-01-27 op /* shut down the proxy TLS connection */
1294 e0f6dc64 2022-01-27 op client_proxy_close(c->pfd, 0, c->proxyctx);
1295 e0f6dc64 2022-01-27 op c->pfd = -1;
1298 e0f6dc64 2022-01-27 op if (c->proxybev != NULL)
1299 e0f6dc64 2022-01-27 op bufferevent_free(c->proxybev);
1301 efe7d180 2021-10-02 op client_close_ev(c->fd, 0, c);
1305 abc007d2 2021-02-08 op do_accept(int sock, short et, void *d)
1307 af1dab18 2023-06-09 op struct conf *conf = d;
1308 abc007d2 2021-02-08 op struct client *c;
1309 d3a08f4d 2021-01-17 op struct sockaddr_storage addr;
1310 abc007d2 2021-02-08 op struct sockaddr *saddr;
1311 d3a08f4d 2021-01-17 op socklen_t len;
1314 abc007d2 2021-02-08 op saddr = (struct sockaddr*)&addr;
1315 d3a08f4d 2021-01-17 op len = sizeof(addr);
1316 3cb3dd4d 2021-02-12 op if ((fd = accept(sock, saddr, &len)) == -1) {
1317 c62a411f 2021-10-13 op if (errno == EWOULDBLOCK || errno == EAGAIN ||
1318 c62a411f 2021-10-13 op errno == ECONNABORTED)
1320 df5058c9 2023-06-05 op fatal("accept");
1323 3cb3dd4d 2021-02-12 op mark_nonblock(fd);
1325 207b3e80 2021-10-07 op c = xcalloc(1, sizeof(*c));
1326 af1dab18 2023-06-09 op c->conf = conf;
1327 207b3e80 2021-10-07 op c->id = ++server_client_id;
1329 207b3e80 2021-10-07 op c->pfd = -1;
1330 207b3e80 2021-10-07 op c->addr = addr;
1332 207b3e80 2021-10-07 op if (tls_accept_socket(ctx, &c->ctx, fd) == -1) {
1333 eae52ad4 2023-06-06 op log_warnx("failed to accept socket: %s", tls_error(c->ctx));
1334 207b3e80 2021-10-07 op close(c->fd);
1339 207b3e80 2021-10-07 op SPLAY_INSERT(client_tree_id, &clients, c);
1340 207b3e80 2021-10-07 op event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1341 207b3e80 2021-10-07 op connected_clients++;
1344 8ad1c570 2021-05-09 op struct client *
1345 3fdc457c 2022-03-26 op client_by_id(int id)
1347 207b3e80 2021-10-07 op struct client find;
1349 207b3e80 2021-10-07 op find.id = id;
1350 207b3e80 2021-10-07 op return SPLAY_FIND(client_tree_id, &clients, &find);
1354 abc007d2 2021-02-08 op handle_siginfo(int fd, short ev, void *d)
1356 eae52ad4 2023-06-06 op log_info("%d connected clients", connected_clients);
1360 070b3295 2023-06-05 op add_keypair(struct vhost *h, struct tls_config *conf)
1362 c26f2460 2023-06-08 op if (h->ocsp == NULL) {
1363 c26f2460 2023-06-08 op if (tls_config_add_keypair_mem(conf, h->cert, h->certlen,
1364 c26f2460 2023-06-08 op h->key, h->keylen) == -1)
1365 c26f2460 2023-06-08 op fatalx("failed to load the keypair: %s",
1366 c26f2460 2023-06-08 op tls_config_error(conf));
1368 c26f2460 2023-06-08 op if (tls_config_add_keypair_ocsp_mem(conf, h->cert, h->certlen,
1369 c26f2460 2023-06-08 op h->key, h->keylen, h->ocsp, h->ocsplen) == -1)
1370 c26f2460 2023-06-08 op fatalx("failed to load the keypair: %s",
1371 070b3295 2023-06-05 op tls_config_error(conf));
1376 af1dab18 2023-06-09 op setup_tls(struct conf *conf)
1378 070b3295 2023-06-05 op struct tls_config *tlsconf;
1379 070b3295 2023-06-05 op struct vhost *h;
1381 c26f2460 2023-06-08 op if (ctx == NULL) {
1382 c26f2460 2023-06-08 op if ((ctx = tls_server()) == NULL)
1383 c26f2460 2023-06-08 op fatal("tls_server failure");
1386 070b3295 2023-06-05 op if ((tlsconf = tls_config_new()) == NULL)
1387 070b3295 2023-06-05 op fatal("tls_config_new");
1389 070b3295 2023-06-05 op /* optionally accept client certs, but don't try to verify them */
1390 070b3295 2023-06-05 op tls_config_verify_client_optional(tlsconf);
1391 070b3295 2023-06-05 op tls_config_insecure_noverifycert(tlsconf);
1393 af1dab18 2023-06-09 op if (tls_config_set_protocols(tlsconf, conf->protos) == -1)
1394 070b3295 2023-06-05 op fatalx("tls_config_set_protocols: %s",
1395 070b3295 2023-06-05 op tls_config_error(tlsconf));
1397 af1dab18 2023-06-09 op h = TAILQ_FIRST(&conf->hosts);
1399 070b3295 2023-06-05 op /* we need to set something, then we can add how many key we want */
1400 c26f2460 2023-06-08 op if (tls_config_set_keypair_mem(tlsconf, h->cert, h->certlen,
1401 c26f2460 2023-06-08 op h->key, h->keylen) == -1)
1402 c26f2460 2023-06-08 op fatalx("tls_config_set_keypair_mem failed: %s",
1403 c26f2460 2023-06-08 op tls_config_error(tlsconf));
1405 070b3295 2023-06-05 op /* same for OCSP */
1406 c26f2460 2023-06-08 op if (h->ocsp != NULL &&
1407 c26f2460 2023-06-08 op tls_config_set_ocsp_staple_mem(tlsconf, h->ocsp, h->ocsplen)
1409 c26f2460 2023-06-08 op fatalx("tls_config_set_ocsp_staple_file failed: %s",
1410 c26f2460 2023-06-08 op tls_config_error(tlsconf));
1412 070b3295 2023-06-05 op while ((h = TAILQ_NEXT(h, vhosts)) != NULL)
1413 070b3295 2023-06-05 op add_keypair(h, tlsconf);
1415 c26f2460 2023-06-08 op tls_reset(ctx);
1416 070b3295 2023-06-05 op if (tls_configure(ctx, tlsconf) == -1)
1417 070b3295 2023-06-05 op fatalx("tls_configure: %s", tls_error(ctx));
1419 070b3295 2023-06-05 op tls_config_free(tlsconf);
1423 af1dab18 2023-06-09 op load_vhosts(struct conf *conf)
1425 a01a91db 2023-06-05 op struct vhost *h;
1426 a01a91db 2023-06-05 op struct location *l;
1428 af1dab18 2023-06-09 op TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1429 a01a91db 2023-06-05 op TAILQ_FOREACH(l, &h->locations, locations) {
1430 a01a91db 2023-06-05 op if (*l->dir == '\0')
1432 a01a91db 2023-06-05 op l->dirfd = open(l->dir, O_RDONLY | O_DIRECTORY);
1433 a01a91db 2023-06-05 op if (l->dirfd == -1)
1434 df5058c9 2023-06-05 op fatal("open %s for domain %s", l->dir,
1441 c26f2460 2023-06-08 op server(struct privsep *ps, struct privsep_proc *p)
1443 c26f2460 2023-06-08 op proc_run(ps, p, procs, nitems(procs), server_init, NULL);
1447 c26f2460 2023-06-08 op server_init(struct privsep *ps, struct privsep_proc *p, void *arg)
1449 c26f2460 2023-06-08 op SPLAY_INIT(&clients);
1451 c26f2460 2023-06-08 op #ifdef SIGINFO
1452 c26f2460 2023-06-08 op has_siginfo = 1;
1453 c26f2460 2023-06-08 op signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1454 c26f2460 2023-06-08 op signal_add(&siginfo, NULL);
1456 c26f2460 2023-06-08 op signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1457 c26f2460 2023-06-08 op signal_add(&sigusr2, NULL);
1459 c26f2460 2023-06-08 op sandbox_server_process();
1463 3886afce 2023-06-08 op server_configure_done(struct conf *conf)
1465 3886afce 2023-06-08 op if (load_default_mime(&conf->mime) == -1)
1466 3886afce 2023-06-08 op fatal("can't load default mime");
1467 3886afce 2023-06-08 op sort_mime(&conf->mime);
1468 af1dab18 2023-06-09 op setup_tls(conf);
1469 af1dab18 2023-06-09 op load_vhosts(conf);
1470 3886afce 2023-06-08 op if (conf->sock4 != -1)
1471 3886afce 2023-06-08 op event_add(&conf->evsock4, NULL);
1472 3886afce 2023-06-08 op if (conf->sock6 != -1)
1473 3886afce 2023-06-08 op event_add(&conf->evsock6, NULL);
1479 c26f2460 2023-06-08 op server_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
1481 c26f2460 2023-06-08 op struct privsep *ps = p->p_ps;
1482 c26f2460 2023-06-08 op struct conf *conf = ps->ps_env;
1484 c26f2460 2023-06-08 op switch (imsg->hdr.type) {
1485 c26f2460 2023-06-08 op case IMSG_RECONF_START:
1486 c26f2460 2023-06-08 op case IMSG_RECONF_MIME:
1487 c26f2460 2023-06-08 op case IMSG_RECONF_PROTOS:
1488 c26f2460 2023-06-08 op case IMSG_RECONF_PORT:
1489 c26f2460 2023-06-08 op case IMSG_RECONF_SOCK4:
1490 c26f2460 2023-06-08 op case IMSG_RECONF_SOCK6:
1491 c26f2460 2023-06-08 op case IMSG_RECONF_FCGI:
1492 c26f2460 2023-06-08 op case IMSG_RECONF_HOST:
1493 c26f2460 2023-06-08 op case IMSG_RECONF_CERT:
1494 c26f2460 2023-06-08 op case IMSG_RECONF_KEY:
1495 c26f2460 2023-06-08 op case IMSG_RECONF_OCSP:
1496 c26f2460 2023-06-08 op case IMSG_RECONF_LOC:
1497 c26f2460 2023-06-08 op case IMSG_RECONF_ENV:
1498 c26f2460 2023-06-08 op case IMSG_RECONF_ALIAS:
1499 c26f2460 2023-06-08 op case IMSG_RECONF_PROXY:
1500 deadd9e1 2023-06-09 op case IMSG_RECONF_PROXY_CERT:
1501 deadd9e1 2023-06-09 op case IMSG_RECONF_PROXY_KEY:
1502 c26f2460 2023-06-08 op return config_recv(conf, imsg);
1503 c26f2460 2023-06-08 op case IMSG_RECONF_END:
1504 c26f2460 2023-06-08 op if (config_recv(conf, imsg) == -1)
1506 3886afce 2023-06-08 op if (server_configure_done(conf) == -1)
1516 c26f2460 2023-06-08 op server_dispatch_logger(int fd, struct privsep_proc *p, struct imsg *imsg)
1522 207b3e80 2021-10-07 op client_tree_cmp(struct client *a, struct client *b)
1524 207b3e80 2021-10-07 op if (a->id == b->id)
1526 207b3e80 2021-10-07 op else if (a->id < b->id)
1532 207b3e80 2021-10-07 op SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)
