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 27b2fa9a 2021-02-12 op start_reply(c, SUCCESS, mime(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 d3a08f4d 2021-01-17 op struct vhost *h;
392 cc8c2901 2021-04-29 op struct alist *a;
393 d3a08f4d 2021-01-17 op const char *servname;
394 a8d4a897 2021-01-29 op const char *parse_err = "unknown error";
396 d3a08f4d 2021-01-17 op switch (tls_handshake(c->ctx)) {
397 d3a08f4d 2021-01-17 op case 0: /* success */
398 d3a08f4d 2021-01-17 op case -1: /* already handshaked */
400 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
401 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, handle_handshake, c, NULL);
403 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
404 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
407 d3a08f4d 2021-01-17 op /* unreachable */
411 80444938 2021-10-15 op c->bev = bufferevent_new(fd, client_read, client_write,
412 80444938 2021-10-15 op client_error, c);
413 80444938 2021-10-15 op if (c->bev == NULL)
414 df5058c9 2023-06-05 op fatal("%s: failed to allocate client buffer", __func__);
416 80444938 2021-10-15 op event_set(&c->bev->ev_read, c->fd, EV_READ,
417 80444938 2021-10-15 op client_tls_readcb, c->bev);
418 80444938 2021-10-15 op event_set(&c->bev->ev_write, c->fd, EV_WRITE,
419 80444938 2021-10-15 op client_tls_writecb, c->bev);
421 80444938 2021-10-15 op #if HAVE_LIBEVENT2
422 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->input, 0);
423 80444938 2021-10-15 op evbuffer_unfreeze(c->bev->output, 1);
426 79288c8b 2021-09-24 op if ((servname = tls_conn_servername(c->ctx)) == NULL) {
427 eae52ad4 2023-06-06 op log_debug("handshake: missing SNI");
431 a8d4a897 2021-01-29 op if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
432 eae52ad4 2023-06-06 op log_info("puny_decode: %s", parse_err);
436 b8e64ccd 2021-03-31 op TAILQ_FOREACH(h, &hosts, vhosts) {
437 eecad7a3 2021-02-12 op if (matches(h->domain, c->domain))
439 cc8c2901 2021-04-29 op TAILQ_FOREACH(a, &h->aliases, aliases) {
440 cc8c2901 2021-04-29 op if (matches(a->alias, c->domain))
446 eae52ad4 2023-06-06 op log_debug("handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
447 3abf91b0 2021-02-07 op servname != NULL ? servname : "(null)",
449 b8e64ccd 2021-03-31 op h != NULL ? h->domain : "(null)");
451 b8e64ccd 2021-03-31 op if (h != NULL) {
453 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EV_READ);
458 abc007d2 2021-02-08 op start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
461 91b9f2a8 2021-05-15 op static const char *
462 91b9f2a8 2021-05-15 op strip_path(const char *path, int strip)
466 6abda252 2021-02-06 op while (strip > 0) {
467 6abda252 2021-02-06 op if ((t = strchr(path, '/')) == NULL) {
468 6abda252 2021-02-06 op path = strchr(path, '\0');
479 57ec3e77 2021-02-08 op fmt_sbuf(const char *fmt, struct client *c, const char *path)
482 4842c72d 2021-10-18 op char buf[32];
484 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
485 6abda252 2021-02-06 op for (i = 0; *fmt; ++fmt) {
486 6abda252 2021-02-06 op if (i == sizeof(buf)-1 || *fmt == '%') {
487 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
488 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
492 6abda252 2021-02-06 op if (*fmt != '%') {
493 6abda252 2021-02-06 op buf[i++] = *fmt;
497 6abda252 2021-02-06 op switch (*++fmt) {
499 6abda252 2021-02-06 op strlcat(c->sbuf, "%", sizeof(c->sbuf));
502 737a6b50 2021-04-30 op if (*path != '/')
503 737a6b50 2021-04-30 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
504 6abda252 2021-02-06 op strlcat(c->sbuf, path, sizeof(c->sbuf));
507 6abda252 2021-02-06 op strlcat(c->sbuf, c->iri.query, sizeof(c->sbuf));
510 6abda252 2021-02-06 op snprintf(buf, sizeof(buf), "%d", conf.port);
511 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
512 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
515 6abda252 2021-02-06 op strlcat(c->sbuf, c->domain, sizeof(c->sbuf));
518 df5058c9 2023-06-05 op fatalx("%s: unknown fmt specifier %c",
519 6abda252 2021-02-06 op __func__, *fmt);
524 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
527 57ec3e77 2021-02-08 op /* 1 if a matching `block return' (and apply it), 0 otherwise */
529 57ec3e77 2021-02-08 op apply_block_return(struct client *c)
531 57ec3e77 2021-02-08 op const char *fmt, *path;
534 57ec3e77 2021-02-08 op if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
537 57ec3e77 2021-02-08 op path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
538 57ec3e77 2021-02-08 op fmt_sbuf(fmt, c, path);
540 abc007d2 2021-02-08 op start_reply(c, code, c->sbuf);
544 b7967bc1 2022-01-02 op static struct proxy *
545 b7967bc1 2022-01-02 op matched_proxy(struct client *c)
547 b7967bc1 2022-01-02 op struct proxy *p;
548 b7967bc1 2022-01-02 op const char *proto;
549 b7967bc1 2022-01-02 op const char *host;
550 b7967bc1 2022-01-02 op const char *port;
552 b7967bc1 2022-01-02 op TAILQ_FOREACH(p, &c->host->proxies, proxies) {
553 534afd0d 2022-10-05 op if (*(proto = p->match_proto) == '\0')
554 b7967bc1 2022-01-02 op proto = "gemini";
555 534afd0d 2022-10-05 op if (*(host = p->match_host) == '\0')
557 534afd0d 2022-10-05 op if (*(port = p->match_port) == '\0')
560 b7967bc1 2022-01-02 op if (matches(proto, c->iri.schema) &&
561 b7967bc1 2022-01-02 op matches(host, c->domain) &&
562 b7967bc1 2022-01-02 op matches(port, c->iri.port))
570 ba94a608 2022-01-04 op check_matching_certificate(X509_STORE *store, struct client *c)
572 ba94a608 2022-01-04 op const uint8_t *cert;
575 ba94a608 2022-01-04 op if (!tls_peer_cert_provided(c->ctx)) {
576 ba94a608 2022-01-04 op start_reply(c, CLIENT_CERT_REQ, "client certificate required");
580 ba94a608 2022-01-04 op cert = tls_peer_cert_chain_pem(c->ctx, &len);
581 ba94a608 2022-01-04 op if (!validate_against_ca(store, cert, len)) {
582 ba94a608 2022-01-04 op start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
590 d29a2ee2 2022-09-06 op proxy_socket(struct client *c, const char *host, const char *port)
592 d29a2ee2 2022-09-06 op struct addrinfo hints, *res, *res0;
593 eae52ad4 2023-06-06 op int r, sock, save_errno;
594 eae52ad4 2023-06-06 op const char *cause = NULL;
596 d29a2ee2 2022-09-06 op memset(&hints, 0, sizeof(hints));
597 d29a2ee2 2022-09-06 op hints.ai_family = AF_UNSPEC;
598 d29a2ee2 2022-09-06 op hints.ai_socktype = SOCK_STREAM;
600 d29a2ee2 2022-09-06 op /* XXX: asr_run? :> */
601 d29a2ee2 2022-09-06 op r = getaddrinfo(host, port, &hints, &res0);
602 d29a2ee2 2022-09-06 op if (r != 0) {
603 eae52ad4 2023-06-06 op log_warnx("getaddrinfo(\"%s\", \"%s\"): %s",
604 d29a2ee2 2022-09-06 op host, port, gai_strerror(r));
608 d29a2ee2 2022-09-06 op for (res = res0; res; res = res->ai_next) {
609 d29a2ee2 2022-09-06 op sock = socket(res->ai_family, res->ai_socktype,
610 d29a2ee2 2022-09-06 op res->ai_protocol);
611 eae52ad4 2023-06-06 op if (sock == -1) {
612 eae52ad4 2023-06-06 op cause = "socket";
616 d29a2ee2 2022-09-06 op if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
617 eae52ad4 2023-06-06 op cause = "connect";
618 eae52ad4 2023-06-06 op save_errno = errno;
620 eae52ad4 2023-06-06 op errno = save_errno;
628 d29a2ee2 2022-09-06 op if (sock == -1)
629 eae52ad4 2023-06-06 op log_warn("can't connect to %s:%s: %s", host, port, cause);
631 eae52ad4 2023-06-06 op freeaddrinfo(res0);
636 72b033ef 2021-12-29 op /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
638 72b033ef 2021-12-29 op apply_reverse_proxy(struct client *c)
640 7bdcc91e 2022-01-01 op struct proxy *p;
642 b7967bc1 2022-01-02 op if ((p = matched_proxy(c)) == NULL)
645 b7967bc1 2022-01-02 op c->proxy = p;
647 ba94a608 2022-01-04 op if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
650 eae52ad4 2023-06-06 op log_debug("opening proxy connection for %s:%s",
651 7bdcc91e 2022-01-01 op p->host, p->port);
653 d29a2ee2 2022-09-06 op if ((c->pfd = proxy_socket(c, p->host, p->port)) == -1) {
654 d29a2ee2 2022-09-06 op start_reply(c, PROXY_ERROR, "proxy error");
658 d29a2ee2 2022-09-06 op mark_nonblock(c->pfd);
659 d29a2ee2 2022-09-06 op if (proxy_init(c) == -1)
660 d29a2ee2 2022-09-06 op start_reply(c, PROXY_ERROR, "proxy error");
666 d29a2ee2 2022-09-06 op fcgi_open_sock(struct fcgi *f)
668 d29a2ee2 2022-09-06 op struct sockaddr_un addr;
671 d29a2ee2 2022-09-06 op if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
672 eae52ad4 2023-06-06 op log_warn("socket");
676 d29a2ee2 2022-09-06 op memset(&addr, 0, sizeof(addr));
677 d29a2ee2 2022-09-06 op addr.sun_family = AF_UNIX;
678 d29a2ee2 2022-09-06 op strlcpy(addr.sun_path, f->path, sizeof(addr.sun_path));
680 d29a2ee2 2022-09-06 op if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
681 eae52ad4 2023-06-06 op log_warn("failed to connect to %s", f->path);
690 d29a2ee2 2022-09-06 op fcgi_open_conn(struct fcgi *f)
692 eae52ad4 2023-06-06 op struct addrinfo hints, *servinfo, *p;
693 eae52ad4 2023-06-06 op int r, sock, save_errno;
694 eae52ad4 2023-06-06 op const char *cause = NULL;
696 d29a2ee2 2022-09-06 op memset(&hints, 0, sizeof(hints));
697 d29a2ee2 2022-09-06 op hints.ai_family = AF_UNSPEC;
698 d29a2ee2 2022-09-06 op hints.ai_socktype = SOCK_STREAM;
699 d29a2ee2 2022-09-06 op hints.ai_flags = AI_ADDRCONFIG;
701 d29a2ee2 2022-09-06 op if ((r = getaddrinfo(f->path, f->port, &hints, &servinfo)) != 0) {
702 eae52ad4 2023-06-06 op log_warnx("getaddrinfo %s:%s: %s", f->path, f->port,
703 d29a2ee2 2022-09-06 op gai_strerror(r));
707 d29a2ee2 2022-09-06 op for (p = servinfo; p != NULL; p = p->ai_next) {
708 d29a2ee2 2022-09-06 op sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
709 eae52ad4 2023-06-06 op if (sock == -1) {
710 eae52ad4 2023-06-06 op cause = "socket";
713 d29a2ee2 2022-09-06 op if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
714 eae52ad4 2023-06-06 op cause = "connect";
715 eae52ad4 2023-06-06 op save_errno = errno;
717 eae52ad4 2023-06-06 op errno = save_errno;
723 d29a2ee2 2022-09-06 op if (p == NULL) {
724 eae52ad4 2023-06-06 op log_warn("couldn't connect to %s:%s: %s", f->path, f->port,
729 d29a2ee2 2022-09-06 op freeaddrinfo(servinfo);
733 8ad1c570 2021-05-09 op /* 1 if matching `fcgi' (and apply it), 0 otherwise */
735 8ad1c570 2021-05-09 op apply_fastcgi(struct client *c)
737 5d22294a 2023-06-09 op int id, i = 0;
738 8ad1c570 2021-05-09 op struct fcgi *f;
740 8ad1c570 2021-05-09 op if ((id = vhost_fastcgi(c->host, c->iri.path)) == -1)
743 5d22294a 2023-06-09 op TAILQ_FOREACH(f, &conf.fcgi, fcgi) {
749 5d22294a 2023-06-09 op if (f == NULL) {
750 5d22294a 2023-06-09 op log_warnx("can't find fcgi #%d", id);
754 eae52ad4 2023-06-06 op log_debug("opening fastcgi connection for (%s,%s)",
755 d29a2ee2 2022-09-06 op f->path, f->port);
757 eb4f96c1 2022-11-27 op if (*f->port == '\0')
758 d29a2ee2 2022-09-06 op c->pfd = fcgi_open_sock(f);
760 d29a2ee2 2022-09-06 op c->pfd = fcgi_open_conn(f);
762 d29a2ee2 2022-09-06 op if (c->pfd == -1) {
763 d29a2ee2 2022-09-06 op start_reply(c, CGI_ERROR, "CGI error");
767 d29a2ee2 2022-09-06 op mark_nonblock(c->pfd);
769 d29a2ee2 2022-09-06 op c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
770 d29a2ee2 2022-09-06 op fcgi_error, c);
771 d29a2ee2 2022-09-06 op if (c->cgibev == NULL) {
772 d29a2ee2 2022-09-06 op start_reply(c, TEMP_FAILURE, "internal server error");
776 d29a2ee2 2022-09-06 op bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
782 02be96c6 2021-02-09 op /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
784 02be96c6 2021-02-09 op apply_require_ca(struct client *c)
786 02be96c6 2021-02-09 op X509_STORE *store;
788 02be96c6 2021-02-09 op if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
790 ba94a608 2022-01-04 op return check_matching_certificate(store, c);
794 abc007d2 2021-02-08 op open_dir(struct client *c)
797 11c98667 2021-04-25 op int dirfd, root;
798 252908e6 2021-01-24 op char *before_file;
800 eae52ad4 2023-06-06 op log_debug("in open_dir");
802 11c98667 2021-04-25 op root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
804 0be51733 2021-01-20 op len = strlen(c->iri.path);
805 252908e6 2021-01-24 op if (len > 0 && !ends_with(c->iri.path, "/")) {
806 abc007d2 2021-02-08 op redirect_canonical_dir(c);
810 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
811 d1ca3911 2021-01-21 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
812 d1ca3911 2021-01-21 op if (!ends_with(c->sbuf, "/"))
813 0be51733 2021-01-20 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
814 252908e6 2021-01-24 op before_file = strchr(c->sbuf, '\0');
815 c8b74339 2021-01-24 op len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
816 c8b74339 2021-01-24 op sizeof(c->sbuf));
817 252908e6 2021-01-24 op if (len >= sizeof(c->sbuf)) {
818 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
822 252908e6 2021-01-24 op c->iri.path = c->sbuf;
824 252908e6 2021-01-24 op /* close later unless we have to generate the dir listing */
825 abc007d2 2021-02-08 op dirfd = c->pfd;
828 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
829 252908e6 2021-01-24 op case FILE_EXISTS:
830 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
831 98ee8406 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
834 252908e6 2021-01-24 op case FILE_DIRECTORY:
835 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
838 252908e6 2021-01-24 op case FILE_MISSING:
839 252908e6 2021-01-24 op *before_file = '\0';
841 252908e6 2021-01-24 op if (!vhost_auto_index(c->host, c->iri.path)) {
842 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
846 efe7d180 2021-10-02 op c->type = REQUEST_DIR;
848 e76f2c74 2021-04-25 op c->dirlen = scandir_fd(dirfd, &c->dir,
849 11c98667 2021-04-25 op root ? select_non_dotdot : select_non_dot,
851 11c98667 2021-04-25 op if (c->dirlen == -1) {
852 eae52ad4 2023-06-06 op log_warn("scandir_fd(%d) (vhost:%s) %s",
853 eae52ad4 2023-06-06 op c->pfd, c->host->domain, c->iri.path);
854 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
857 11c98667 2021-04-25 op c->diroff = 0;
860 4842c72d 2021-10-18 op start_reply(c, SUCCESS, "text/gemini");
861 efe7d180 2021-10-02 op evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
862 efe7d180 2021-10-02 op "# Index of %s\n\n", c->iri.path);
866 252908e6 2021-01-24 op /* unreachable */
870 252908e6 2021-01-24 op close(dirfd);
874 abc007d2 2021-02-08 op redirect_canonical_dir(struct client *c)
878 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
879 252908e6 2021-01-24 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
880 252908e6 2021-01-24 op len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
882 0be51733 2021-01-20 op if (len >= sizeof(c->sbuf)) {
883 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
887 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
891 efe7d180 2021-10-02 op client_tls_readcb(int fd, short event, void *d)
893 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
894 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
897 efe7d180 2021-10-02 op int what = EVBUFFER_READ;
898 efe7d180 2021-10-02 op int howmuch = IBUF_READ_SIZE;
899 efe7d180 2021-10-02 op char buf[IBUF_READ_SIZE];
901 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
902 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
906 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0)
907 efe7d180 2021-10-02 op howmuch = MIN(sizeof(buf), bufev->wm_read.high);
909 efe7d180 2021-10-02 op switch (ret = tls_read(client->ctx, buf, howmuch)) {
910 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
911 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
914 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
919 efe7d180 2021-10-02 op if (len == 0) {
920 efe7d180 2021-10-02 op what |= EVBUFFER_EOF;
924 efe7d180 2021-10-02 op if (evbuffer_add(bufev->input, buf, len) == -1) {
925 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
929 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
930 efe7d180 2021-10-02 op if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
932 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
934 efe7d180 2021-10-02 op * here we could implement a read pressure policy.
938 efe7d180 2021-10-02 op if (bufev->readcb != NULL)
939 efe7d180 2021-10-02 op (*bufev->readcb)(bufev, bufev->cbarg);
944 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
948 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
952 efe7d180 2021-10-02 op client_tls_writecb(int fd, short event, void *d)
954 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
955 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
958 efe7d180 2021-10-02 op short what = EVBUFFER_WRITE;
960 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
961 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
965 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0) {
966 efe7d180 2021-10-02 op ret = tls_write(client->ctx,
967 efe7d180 2021-10-02 op EVBUFFER_DATA(bufev->output),
968 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output));
969 efe7d180 2021-10-02 op switch (ret) {
970 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
971 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
974 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
978 efe7d180 2021-10-02 op evbuffer_drain(bufev->output, len);
981 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0)
982 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
984 efe7d180 2021-10-02 op if (bufev->writecb != NULL &&
985 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
986 efe7d180 2021-10-02 op (*bufev->writecb)(bufev, bufev->cbarg);
990 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
993 eae52ad4 2023-06-06 op log_warnx("tls error: %s", tls_error(client->ctx));
994 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
998 efe7d180 2021-10-02 op client_read(struct bufferevent *bev, void *d)
1000 efe7d180 2021-10-02 op struct client *c = d;
1001 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
1002 efe7d180 2021-10-02 op const char *parse_err = "invalid request";
1003 efe7d180 2021-10-02 op char decoded[DOMAIN_NAME_LEN];
1006 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ);
1009 901905e0 2022-01-05 op * libevent2 can still somehow call this function, even
1010 901905e0 2022-01-05 op * though I never enable EV_READ in the bufferevent. If
1011 901905e0 2022-01-05 op * that's the case, bail out.
1013 901905e0 2022-01-05 op if (c->type != REQUEST_UNDECIDED)
1016 efe7d180 2021-10-02 op /* max url len + \r\n */
1017 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(src) > 1024 + 2) {
1018 eae52ad4 2023-06-06 op log_debug("too much data received");
1019 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "bad request");
1023 efe7d180 2021-10-02 op c->req = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
1024 efe7d180 2021-10-02 op if (c->req == NULL) {
1025 efe7d180 2021-10-02 op /* not enough data yet. */
1026 efe7d180 2021-10-02 op bufferevent_enable(bev, EVBUFFER_READ);
1029 ea27eaaa 2022-03-27 op c->reqlen = strlen(c->req);
1030 ea27eaaa 2022-03-27 op if (c->reqlen > 1024+2) {
1031 eae52ad4 2023-06-06 op log_debug("URL too long");
1032 ea27eaaa 2022-03-27 op start_reply(c, BAD_REQUEST, "bad request");
1036 efe7d180 2021-10-02 op if (!parse_iri(c->req, &c->iri, &parse_err) ||
1037 efe7d180 2021-10-02 op !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
1038 eae52ad4 2023-06-06 op log_debug("IRI parse error: %s", parse_err);
1039 807a80cb 2021-10-06 op start_reply(c, BAD_REQUEST, "bad request");
1043 72b033ef 2021-12-29 op if (apply_reverse_proxy(c))
1046 52c92ef6 2021-12-09 op /* ignore the port number */
1047 52c92ef6 2021-12-09 op if (strcmp(c->iri.schema, "gemini") ||
1048 efe7d180 2021-10-02 op strcmp(decoded, c->domain)) {
1049 efe7d180 2021-10-02 op start_reply(c, PROXY_REFUSED, "won't proxy request");
1053 efe7d180 2021-10-02 op if (apply_require_ca(c) ||
1054 efe7d180 2021-10-02 op apply_block_return(c)||
1055 efe7d180 2021-10-02 op apply_fastcgi(c))
1058 efe7d180 2021-10-02 op open_file(c);
1062 efe7d180 2021-10-02 op client_write(struct bufferevent *bev, void *d)
1064 efe7d180 2021-10-02 op struct client *c = d;
1065 efe7d180 2021-10-02 op struct evbuffer *out = EVBUFFER_OUTPUT(bev);
1066 f2f8eb35 2022-07-04 op char nam[PATH_MAX];
1067 efe7d180 2021-10-02 op char buf[BUFSIZ];
1070 efe7d180 2021-10-02 op switch (c->type) {
1071 efe7d180 2021-10-02 op case REQUEST_UNDECIDED:
1073 efe7d180 2021-10-02 op * Ignore spurious calls when we still don't have idea
1074 efe7d180 2021-10-02 op * what to do with the request.
1078 efe7d180 2021-10-02 op case REQUEST_FILE:
1079 efe7d180 2021-10-02 op if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1080 eae52ad4 2023-06-06 op log_warn("read");
1081 efe7d180 2021-10-02 op client_error(bev, EVBUFFER_ERROR, c);
1083 efe7d180 2021-10-02 op } else if (r == 0) {
1084 efe7d180 2021-10-02 op client_close(c);
1086 efe7d180 2021-10-02 op } else if (r != sizeof(buf))
1087 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1088 efe7d180 2021-10-02 op bufferevent_write(bev, buf, r);
1091 efe7d180 2021-10-02 op case REQUEST_DIR:
1092 efe7d180 2021-10-02 op /* TODO: handle big big directories better */
1093 efe7d180 2021-10-02 op for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1094 543f4a66 2022-07-04 op const char *sufx = "";
1096 f2f8eb35 2022-07-04 op encode_path(nam, sizeof(nam),
1097 efe7d180 2021-10-02 op c->dir[c->diroff]->d_name);
1098 543f4a66 2022-07-04 op if (c->dir[c->diroff]->d_type == DT_DIR)
1100 543f4a66 2022-07-04 op evbuffer_add_printf(out, "=> ./%s%s\n", nam, sufx);
1101 efe7d180 2021-10-02 op free(c->dir[c->diroff]);
1103 efe7d180 2021-10-02 op free(c->dir);
1104 efe7d180 2021-10-02 op c->dir = NULL;
1106 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1108 efe7d180 2021-10-02 op event_add(&c->bev->ev_write, NULL);
1111 efe7d180 2021-10-02 op case REQUEST_FCGI:
1112 72b033ef 2021-12-29 op case REQUEST_PROXY:
1114 d29a2ee2 2022-09-06 op * Here we depend on fastcgi or proxy connection to
1115 d29a2ee2 2022-09-06 op * provide data.
1119 efe7d180 2021-10-02 op case REQUEST_DONE:
1120 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(out) == 0)
1121 efe7d180 2021-10-02 op client_close(c);
1127 efe7d180 2021-10-02 op client_error(struct bufferevent *bev, short error, void *d)
1129 efe7d180 2021-10-02 op struct client *c = d;
1131 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1133 efe7d180 2021-10-02 op if (error & EVBUFFER_TIMEOUT) {
1134 eae52ad4 2023-06-06 op log_debug("timeout; forcefully closing the connection");
1135 efe7d180 2021-10-02 op if (c->code == 0)
1136 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "timeout");
1138 efe7d180 2021-10-02 op client_close(c);
1142 efe7d180 2021-10-02 op if (error & EVBUFFER_EOF) {
1143 efe7d180 2021-10-02 op client_close(c);
1147 eae52ad4 2023-06-06 op log_warnx("unknown bufferevent error 0x%x", error);
1148 efe7d180 2021-10-02 op client_close(c);
1152 efe7d180 2021-10-02 op start_reply(struct client *c, int code, const char *meta)
1154 efe7d180 2021-10-02 op struct evbuffer *evb = EVBUFFER_OUTPUT(c->bev);
1155 efe7d180 2021-10-02 op const char *lang;
1158 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EVBUFFER_WRITE);
1160 efe7d180 2021-10-02 op c->code = code;
1161 efe7d180 2021-10-02 op c->meta = meta;
1163 efe7d180 2021-10-02 op r = evbuffer_add_printf(evb, "%d %s", code, meta);
1164 efe7d180 2021-10-02 op if (r == -1)
1167 efe7d180 2021-10-02 op /* 2 digit status + space + 1024 max reply */
1168 efe7d180 2021-10-02 op if (r > 1027)
1169 efe7d180 2021-10-02 op goto overflow;
1171 d29a2ee2 2022-09-06 op if (c->type != REQUEST_FCGI &&
1172 72b033ef 2021-12-29 op c->type != REQUEST_PROXY &&
1173 efe7d180 2021-10-02 op !strcmp(meta, "text/gemini") &&
1174 efe7d180 2021-10-02 op (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1175 4842c72d 2021-10-18 op rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1176 efe7d180 2021-10-02 op if (rr == -1)
1178 efe7d180 2021-10-02 op if (r + rr > 1027)
1179 efe7d180 2021-10-02 op goto overflow;
1182 efe7d180 2021-10-02 op bufferevent_write(c->bev, "\r\n", 2);
1184 efe7d180 2021-10-02 op if (!vhost_disable_log(c->host, c->iri.path))
1185 efe7d180 2021-10-02 op log_request(c, EVBUFFER_DATA(evb), EVBUFFER_LENGTH(evb));
1187 d28bd963 2022-01-27 op if (code != 20)
1188 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1193 eae52ad4 2023-06-06 op log_warnx("evbuffer_add_printf error: no memory");
1194 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1195 efe7d180 2021-10-02 op client_close(c);
1199 eae52ad4 2023-06-06 op log_warnx("reply header overflow");
1200 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1201 efe7d180 2021-10-02 op start_reply(c, TEMP_FAILURE, "internal error");
1205 efe7d180 2021-10-02 op client_close_ev(int fd, short event, void *d)
1207 8ad1c570 2021-05-09 op struct client *c = d;
1209 d3a08f4d 2021-01-17 op switch (tls_close(c->ctx)) {
1210 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
1211 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1213 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
1214 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1218 d3a08f4d 2021-01-17 op connected_clients--;
1220 e4daebe4 2021-10-06 op free(c->req);
1222 d3a08f4d 2021-01-17 op tls_free(c->ctx);
1223 d3a08f4d 2021-01-17 op c->ctx = NULL;
1225 efe7d180 2021-10-02 op free(c->header);
1227 abc007d2 2021-02-08 op if (c->pfd != -1)
1228 abc007d2 2021-02-08 op close(c->pfd);
1230 252908e6 2021-01-24 op if (c->dir != NULL)
1231 11c98667 2021-04-25 op free(c->dir);
1233 abc007d2 2021-02-08 op close(c->fd);
1238 72b033ef 2021-12-29 op client_proxy_close(int fd, short event, void *d)
1240 72b033ef 2021-12-29 op struct tls *ctx = d;
1242 72b033ef 2021-12-29 op if (ctx == NULL) {
1247 72b033ef 2021-12-29 op switch (tls_close(ctx)) {
1248 72b033ef 2021-12-29 op case TLS_WANT_POLLIN:
1249 72b033ef 2021-12-29 op event_once(fd, EV_READ, client_proxy_close, d, NULL);
1251 72b033ef 2021-12-29 op case TLS_WANT_POLLOUT:
1252 72b033ef 2021-12-29 op event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1256 72b033ef 2021-12-29 op tls_free(ctx);
1261 efe7d180 2021-10-02 op client_close(struct client *c)
1264 efe7d180 2021-10-02 op * We may end up calling client_close in various situations
1265 efe7d180 2021-10-02 op * and for the most unexpected reasons. Therefore, we need to
1266 b9b77f53 2022-01-27 op * ensure that everything gets properly released once we reach
1267 efe7d180 2021-10-02 op * this point.
1270 207b3e80 2021-10-07 op SPLAY_REMOVE(client_tree_id, &clients, c);
1272 efe7d180 2021-10-02 op if (c->cgibev != NULL) {
1273 efe7d180 2021-10-02 op bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1274 efe7d180 2021-10-02 op bufferevent_free(c->cgibev);
1275 efe7d180 2021-10-02 op c->cgibev = NULL;
1276 efe7d180 2021-10-02 op close(c->pfd);
1277 efe7d180 2021-10-02 op c->pfd = -1;
1280 efe7d180 2021-10-02 op bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1281 efe7d180 2021-10-02 op bufferevent_free(c->bev);
1282 efe7d180 2021-10-02 op c->bev = NULL;
1284 e0f6dc64 2022-01-27 op if (c->proxyevset &&
1285 e0f6dc64 2022-01-27 op event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1286 e0f6dc64 2022-01-27 op c->proxyevset = 0;
1287 e0f6dc64 2022-01-27 op event_del(&c->proxyev);
1290 e0f6dc64 2022-01-27 op if (c->pfd != -1 && c->proxyctx != NULL) {
1291 e0f6dc64 2022-01-27 op /* shut down the proxy TLS connection */
1292 e0f6dc64 2022-01-27 op client_proxy_close(c->pfd, 0, c->proxyctx);
1293 e0f6dc64 2022-01-27 op c->pfd = -1;
1296 e0f6dc64 2022-01-27 op if (c->proxybev != NULL)
1297 e0f6dc64 2022-01-27 op bufferevent_free(c->proxybev);
1299 efe7d180 2021-10-02 op client_close_ev(c->fd, 0, c);
1303 abc007d2 2021-02-08 op do_accept(int sock, short et, void *d)
1305 abc007d2 2021-02-08 op struct client *c;
1306 d3a08f4d 2021-01-17 op struct sockaddr_storage addr;
1307 abc007d2 2021-02-08 op struct sockaddr *saddr;
1308 d3a08f4d 2021-01-17 op socklen_t len;
1311 abc007d2 2021-02-08 op saddr = (struct sockaddr*)&addr;
1312 d3a08f4d 2021-01-17 op len = sizeof(addr);
1313 3cb3dd4d 2021-02-12 op if ((fd = accept(sock, saddr, &len)) == -1) {
1314 c62a411f 2021-10-13 op if (errno == EWOULDBLOCK || errno == EAGAIN ||
1315 c62a411f 2021-10-13 op errno == ECONNABORTED)
1317 df5058c9 2023-06-05 op fatal("accept");
1320 3cb3dd4d 2021-02-12 op mark_nonblock(fd);
1322 207b3e80 2021-10-07 op c = xcalloc(1, sizeof(*c));
1323 207b3e80 2021-10-07 op c->id = ++server_client_id;
1325 207b3e80 2021-10-07 op c->pfd = -1;
1326 207b3e80 2021-10-07 op c->addr = addr;
1328 207b3e80 2021-10-07 op if (tls_accept_socket(ctx, &c->ctx, fd) == -1) {
1329 eae52ad4 2023-06-06 op log_warnx("failed to accept socket: %s", tls_error(c->ctx));
1330 207b3e80 2021-10-07 op close(c->fd);
1335 207b3e80 2021-10-07 op SPLAY_INSERT(client_tree_id, &clients, c);
1336 207b3e80 2021-10-07 op event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1337 207b3e80 2021-10-07 op connected_clients++;
1340 8ad1c570 2021-05-09 op struct client *
1341 3fdc457c 2022-03-26 op client_by_id(int id)
1343 207b3e80 2021-10-07 op struct client find;
1345 207b3e80 2021-10-07 op find.id = id;
1346 207b3e80 2021-10-07 op return SPLAY_FIND(client_tree_id, &clients, &find);
1350 abc007d2 2021-02-08 op handle_siginfo(int fd, short ev, void *d)
1352 eae52ad4 2023-06-06 op log_info("%d connected clients", connected_clients);
1356 070b3295 2023-06-05 op add_keypair(struct vhost *h, struct tls_config *conf)
1358 c26f2460 2023-06-08 op if (h->ocsp == NULL) {
1359 c26f2460 2023-06-08 op if (tls_config_add_keypair_mem(conf, h->cert, h->certlen,
1360 c26f2460 2023-06-08 op h->key, h->keylen) == -1)
1361 c26f2460 2023-06-08 op fatalx("failed to load the keypair: %s",
1362 c26f2460 2023-06-08 op tls_config_error(conf));
1364 c26f2460 2023-06-08 op if (tls_config_add_keypair_ocsp_mem(conf, h->cert, h->certlen,
1365 c26f2460 2023-06-08 op h->key, h->keylen, h->ocsp, h->ocsplen) == -1)
1366 c26f2460 2023-06-08 op fatalx("failed to load the keypair: %s",
1367 070b3295 2023-06-05 op tls_config_error(conf));
1372 070b3295 2023-06-05 op setup_tls(void)
1374 070b3295 2023-06-05 op struct tls_config *tlsconf;
1375 070b3295 2023-06-05 op struct vhost *h;
1377 c26f2460 2023-06-08 op if (ctx == NULL) {
1378 c26f2460 2023-06-08 op if ((ctx = tls_server()) == NULL)
1379 c26f2460 2023-06-08 op fatal("tls_server failure");
1382 070b3295 2023-06-05 op if ((tlsconf = tls_config_new()) == NULL)
1383 070b3295 2023-06-05 op fatal("tls_config_new");
1385 070b3295 2023-06-05 op /* optionally accept client certs, but don't try to verify them */
1386 070b3295 2023-06-05 op tls_config_verify_client_optional(tlsconf);
1387 070b3295 2023-06-05 op tls_config_insecure_noverifycert(tlsconf);
1389 070b3295 2023-06-05 op if (tls_config_set_protocols(tlsconf, conf.protos) == -1)
1390 070b3295 2023-06-05 op fatalx("tls_config_set_protocols: %s",
1391 070b3295 2023-06-05 op tls_config_error(tlsconf));
1393 070b3295 2023-06-05 op h = TAILQ_FIRST(&hosts);
1395 070b3295 2023-06-05 op /* we need to set something, then we can add how many key we want */
1396 c26f2460 2023-06-08 op if (tls_config_set_keypair_mem(tlsconf, h->cert, h->certlen,
1397 c26f2460 2023-06-08 op h->key, h->keylen) == -1)
1398 c26f2460 2023-06-08 op fatalx("tls_config_set_keypair_mem failed: %s",
1399 c26f2460 2023-06-08 op tls_config_error(tlsconf));
1401 070b3295 2023-06-05 op /* same for OCSP */
1402 c26f2460 2023-06-08 op if (h->ocsp != NULL &&
1403 c26f2460 2023-06-08 op tls_config_set_ocsp_staple_mem(tlsconf, h->ocsp, h->ocsplen)
1405 c26f2460 2023-06-08 op fatalx("tls_config_set_ocsp_staple_file failed: %s",
1406 c26f2460 2023-06-08 op tls_config_error(tlsconf));
1408 070b3295 2023-06-05 op while ((h = TAILQ_NEXT(h, vhosts)) != NULL)
1409 070b3295 2023-06-05 op add_keypair(h, tlsconf);
1411 c26f2460 2023-06-08 op tls_reset(ctx);
1412 070b3295 2023-06-05 op if (tls_configure(ctx, tlsconf) == -1)
1413 070b3295 2023-06-05 op fatalx("tls_configure: %s", tls_error(ctx));
1415 070b3295 2023-06-05 op tls_config_free(tlsconf);
1419 a01a91db 2023-06-05 op load_vhosts(void)
1421 a01a91db 2023-06-05 op struct vhost *h;
1422 a01a91db 2023-06-05 op struct location *l;
1424 a01a91db 2023-06-05 op TAILQ_FOREACH(h, &hosts, vhosts) {
1425 a01a91db 2023-06-05 op TAILQ_FOREACH(l, &h->locations, locations) {
1426 a01a91db 2023-06-05 op if (*l->dir == '\0')
1428 a01a91db 2023-06-05 op l->dirfd = open(l->dir, O_RDONLY | O_DIRECTORY);
1429 a01a91db 2023-06-05 op if (l->dirfd == -1)
1430 df5058c9 2023-06-05 op fatal("open %s for domain %s", l->dir,
1437 c26f2460 2023-06-08 op server(struct privsep *ps, struct privsep_proc *p)
1439 c26f2460 2023-06-08 op proc_run(ps, p, procs, nitems(procs), server_init, NULL);
1443 c26f2460 2023-06-08 op server_init(struct privsep *ps, struct privsep_proc *p, void *arg)
1445 c26f2460 2023-06-08 op SPLAY_INIT(&clients);
1447 c26f2460 2023-06-08 op #ifdef SIGINFO
1448 c26f2460 2023-06-08 op has_siginfo = 1;
1449 c26f2460 2023-06-08 op signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1450 c26f2460 2023-06-08 op signal_add(&siginfo, NULL);
1452 c26f2460 2023-06-08 op signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1453 c26f2460 2023-06-08 op signal_add(&sigusr2, NULL);
1455 c26f2460 2023-06-08 op sandbox_server_process();
1459 3886afce 2023-06-08 op server_configure_done(struct conf *conf)
1461 3886afce 2023-06-08 op if (load_default_mime(&conf->mime) == -1)
1462 3886afce 2023-06-08 op fatal("can't load default mime");
1463 3886afce 2023-06-08 op sort_mime(&conf->mime);
1464 3886afce 2023-06-08 op setup_tls();
1465 3886afce 2023-06-08 op load_vhosts();
1466 3886afce 2023-06-08 op if (conf->sock4 != -1)
1467 3886afce 2023-06-08 op event_add(&conf->evsock4, NULL);
1468 3886afce 2023-06-08 op if (conf->sock6 != -1)
1469 3886afce 2023-06-08 op event_add(&conf->evsock6, NULL);
1475 c26f2460 2023-06-08 op server_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
1477 c26f2460 2023-06-08 op struct privsep *ps = p->p_ps;
1478 c26f2460 2023-06-08 op struct conf *conf = ps->ps_env;
1480 c26f2460 2023-06-08 op switch (imsg->hdr.type) {
1481 c26f2460 2023-06-08 op case IMSG_RECONF_START:
1482 c26f2460 2023-06-08 op case IMSG_RECONF_MIME:
1483 c26f2460 2023-06-08 op case IMSG_RECONF_PROTOS:
1484 c26f2460 2023-06-08 op case IMSG_RECONF_PORT:
1485 c26f2460 2023-06-08 op case IMSG_RECONF_SOCK4:
1486 c26f2460 2023-06-08 op case IMSG_RECONF_SOCK6:
1487 c26f2460 2023-06-08 op case IMSG_RECONF_FCGI:
1488 c26f2460 2023-06-08 op case IMSG_RECONF_HOST:
1489 c26f2460 2023-06-08 op case IMSG_RECONF_CERT:
1490 c26f2460 2023-06-08 op case IMSG_RECONF_KEY:
1491 c26f2460 2023-06-08 op case IMSG_RECONF_OCSP:
1492 c26f2460 2023-06-08 op case IMSG_RECONF_LOC:
1493 c26f2460 2023-06-08 op case IMSG_RECONF_ENV:
1494 c26f2460 2023-06-08 op case IMSG_RECONF_ALIAS:
1495 c26f2460 2023-06-08 op case IMSG_RECONF_PROXY:
1496 deadd9e1 2023-06-09 op case IMSG_RECONF_PROXY_CERT:
1497 deadd9e1 2023-06-09 op case IMSG_RECONF_PROXY_KEY:
1498 c26f2460 2023-06-08 op return config_recv(conf, imsg);
1499 c26f2460 2023-06-08 op case IMSG_RECONF_END:
1500 c26f2460 2023-06-08 op if (config_recv(conf, imsg) == -1)
1502 3886afce 2023-06-08 op if (server_configure_done(conf) == -1)
1512 c26f2460 2023-06-08 op server_dispatch_logger(int fd, struct privsep_proc *p, struct imsg *imsg)
1518 207b3e80 2021-10-07 op client_tree_cmp(struct client *a, struct client *b)
1520 207b3e80 2021-10-07 op if (a->id == b->id)
1522 207b3e80 2021-10-07 op else if (a->id < b->id)
1528 207b3e80 2021-10-07 op SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)
