2 d3a08f4d 2021-01-17 op * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
4 d3a08f4d 2021-01-17 op * Permission to use, copy, modify, and distribute this software for any
5 d3a08f4d 2021-01-17 op * purpose with or without fee is hereby granted, provided that the above
6 d3a08f4d 2021-01-17 op * copyright notice and this permission notice appear in all copies.
8 d3a08f4d 2021-01-17 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 d3a08f4d 2021-01-17 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 d3a08f4d 2021-01-17 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 d3a08f4d 2021-01-17 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 d3a08f4d 2021-01-17 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 d3a08f4d 2021-01-17 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 d3a08f4d 2021-01-17 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 52418c8d 2021-02-12 op #include "gmid.h"
19 d3a08f4d 2021-01-17 op #include <sys/stat.h>
21 d3a08f4d 2021-01-17 op #include <assert.h>
22 efe7d180 2021-10-02 op #include <ctype.h>
23 d3a08f4d 2021-01-17 op #include <errno.h>
24 abc007d2 2021-02-08 op #include <event.h>
25 d3a08f4d 2021-01-17 op #include <fcntl.h>
26 b4d409cf 2021-01-21 op #include <fnmatch.h>
27 2fafa2d2 2021-02-01 op #include <limits.h>
28 d3a08f4d 2021-01-17 op #include <string.h>
30 efe7d180 2021-10-02 op #define MIN(a, b) ((a) < (b) ? (a) : (b))
32 090b8a89 2021-07-06 op int shutting_down;
34 8ad1c570 2021-05-09 op struct client clients[MAX_USERS];
36 bc99d868 2021-03-19 op static struct tls *ctx;
38 bc99d868 2021-03-19 op static struct event e4, e6, imsgev, siginfo, sigusr2;
39 6b191ed5 2021-02-23 op static int has_ipv6, has_siginfo;
41 d3a08f4d 2021-01-17 op int connected_clients;
43 49b73ba1 2021-02-10 op static inline int matches(const char*, const char*);
45 fe406389 2021-02-02 op static int check_path(struct client*, const char*, int*);
46 abc007d2 2021-02-08 op static void open_file(struct client*);
47 abc007d2 2021-02-08 op static void check_for_cgi(struct client*);
48 abc007d2 2021-02-08 op static void handle_handshake(int, short, void*);
49 91b9f2a8 2021-05-15 op static const char *strip_path(const char*, int);
50 57ec3e77 2021-02-08 op static void fmt_sbuf(const char*, struct client*, const char*);
51 abc007d2 2021-02-08 op static int apply_block_return(struct client*);
52 efe7d180 2021-10-02 op static int apply_fastcgi(struct client*);
53 02be96c6 2021-02-09 op static int apply_require_ca(struct client*);
54 b8e64ccd 2021-03-31 op static size_t host_nth(struct vhost*);
55 abc007d2 2021-02-08 op static void start_cgi(const char*, const char*, struct client*);
56 abc007d2 2021-02-08 op static void open_dir(struct client*);
57 abc007d2 2021-02-08 op static void redirect_canonical_dir(struct client*);
59 efe7d180 2021-10-02 op static void client_tls_readcb(int, short, void *);
60 efe7d180 2021-10-02 op static void client_tls_writecb(int, short, void *);
62 efe7d180 2021-10-02 op static void client_read(struct bufferevent *, void *);
63 efe7d180 2021-10-02 op void client_write(struct bufferevent *, void *);
64 efe7d180 2021-10-02 op static void client_error(struct bufferevent *, short, void *);
66 efe7d180 2021-10-02 op static void client_close_ev(int, short, void *);
68 efe7d180 2021-10-02 op static void cgi_read(struct bufferevent *, void *);
69 efe7d180 2021-10-02 op static void cgi_write(struct bufferevent *, void *);
70 efe7d180 2021-10-02 op static void cgi_error(struct bufferevent *, short, void *);
72 abc007d2 2021-02-08 op static void do_accept(int, short, void*);
73 efe7d180 2021-10-02 op static struct client *client_by_id(int);
75 bc99d868 2021-03-19 op static void handle_imsg_cgi_res(struct imsgbuf*, struct imsg*, size_t);
76 8ad1c570 2021-05-09 op static void handle_imsg_fcgi_fd(struct imsgbuf*, struct imsg*, size_t);
77 bc99d868 2021-03-19 op static void handle_imsg_quit(struct imsgbuf*, struct imsg*, size_t);
78 efe7d180 2021-10-02 op static void handle_dispatch_imsg(int, short, void *);
79 bc99d868 2021-03-19 op static void handle_siginfo(int, short, void*);
81 bc99d868 2021-03-19 op static imsg_handlerfn *handlers[] = {
82 bc99d868 2021-03-19 op [IMSG_QUIT] = handle_imsg_quit,
83 bc99d868 2021-03-19 op [IMSG_CGI_RES] = handle_imsg_cgi_res,
84 8ad1c570 2021-05-09 op [IMSG_FCGI_FD] = handle_imsg_fcgi_fd,
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 cd761624 2021-02-06 op if (loc->lang != NULL) {
106 49b73ba1 2021-02-10 op if (matches(loc->match, path))
107 6016a593 2021-01-30 op return loc->lang;
111 b8e64ccd 2021-03-31 op return TAILQ_FIRST(&v->locations)->lang;
115 c8b74339 2021-01-24 op vhost_default_mime(struct vhost *v, const char *path)
117 c8b74339 2021-01-24 op struct location *loc;
118 c8b74339 2021-01-24 op const char *default_mime = "application/octet-stream";
120 caad0308 2021-01-27 op if (v == NULL || path == NULL)
121 caad0308 2021-01-27 op return default_mime;
123 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
124 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
125 cd761624 2021-02-06 op if (loc->default_mime != NULL) {
126 49b73ba1 2021-02-10 op if (matches(loc->match, path))
127 6016a593 2021-01-30 op return loc->default_mime;
131 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
132 b8e64ccd 2021-03-31 op if (loc->default_mime != NULL)
133 b8e64ccd 2021-03-31 op return loc->default_mime;
134 c8b74339 2021-01-24 op return default_mime;
138 c8b74339 2021-01-24 op vhost_index(struct vhost *v, const char *path)
140 c8b74339 2021-01-24 op struct location *loc;
141 c8b74339 2021-01-24 op const char *index = "index.gmi";
143 caad0308 2021-01-27 op if (v == NULL || path == NULL)
144 caad0308 2021-01-27 op return index;
146 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
147 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
148 cd761624 2021-02-06 op if (loc->index != NULL) {
149 49b73ba1 2021-02-10 op if (matches(loc->match, path))
150 6016a593 2021-01-30 op return loc->index;
154 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
155 b8e64ccd 2021-03-31 op if (loc->index != NULL)
156 b8e64ccd 2021-03-31 op return loc->index;
157 c8b74339 2021-01-24 op return index;
161 252908e6 2021-01-24 op vhost_auto_index(struct vhost *v, const char *path)
163 252908e6 2021-01-24 op struct location *loc;
165 6016a593 2021-01-30 op if (v == NULL || path == NULL)
168 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
169 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
170 cd761624 2021-02-06 op if (loc->auto_index != 0) {
171 49b73ba1 2021-02-10 op if (matches(loc->match, path))
172 6016a593 2021-01-30 op return loc->auto_index == 1;
176 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
177 b8e64ccd 2021-03-31 op return loc->auto_index == 1;
181 6abda252 2021-02-06 op vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
183 6abda252 2021-02-06 op struct location *loc;
185 6abda252 2021-02-06 op if (v == NULL || path == NULL)
188 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
189 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
190 cd761624 2021-02-06 op if (loc->block_code != 0) {
191 49b73ba1 2021-02-10 op if (matches(loc->match, path)) {
192 6abda252 2021-02-06 op *code = loc->block_code;
193 6abda252 2021-02-06 op *fmt = loc->block_fmt;
199 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
200 b8e64ccd 2021-03-31 op *code = loc->block_code;
201 b8e64ccd 2021-03-31 op *fmt = loc->block_fmt;
202 b8e64ccd 2021-03-31 op return loc->block_code != 0;
206 8ad1c570 2021-05-09 op vhost_fastcgi(struct vhost *v, const char *path)
208 8ad1c570 2021-05-09 op struct location *loc;
210 8ad1c570 2021-05-09 op if (v == NULL || path == NULL)
213 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
214 8ad1c570 2021-05-09 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
215 8ad1c570 2021-05-09 op if (loc->fcgi != -1)
216 8ad1c570 2021-05-09 op if (matches(loc->match, path))
217 8ad1c570 2021-05-09 op return loc->fcgi;
220 8ad1c570 2021-05-09 op loc = TAILQ_FIRST(&v->locations);
221 8ad1c570 2021-05-09 op return loc->fcgi;
225 1feaf2a6 2021-05-15 op vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
227 fdea6aa0 2021-04-30 op struct location *loc;
228 1feaf2a6 2021-05-15 op size_t l = 0;
230 fdea6aa0 2021-04-30 op if (v == NULL || path == NULL)
233 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
234 fdea6aa0 2021-04-30 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
236 fdea6aa0 2021-04-30 op if (loc->dirfd != -1)
237 1feaf2a6 2021-05-15 op if (matches(loc->match, path)) {
239 fdea6aa0 2021-04-30 op return loc->dirfd;
244 fdea6aa0 2021-04-30 op loc = TAILQ_FIRST(&v->locations);
245 fdea6aa0 2021-04-30 op return loc->dirfd;
249 6abda252 2021-02-06 op vhost_strip(struct vhost *v, const char *path)
251 6abda252 2021-02-06 op struct location *loc;
253 6abda252 2021-02-06 op if (v == NULL || path == NULL)
256 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
257 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
258 cd761624 2021-02-06 op if (loc->strip != 0) {
259 49b73ba1 2021-02-10 op if (matches(loc->match, path))
260 6abda252 2021-02-06 op return loc->strip;
264 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
265 b8e64ccd 2021-03-31 op return loc->strip;
269 02be96c6 2021-02-09 op vhost_require_ca(struct vhost *v, const char *path)
271 02be96c6 2021-02-09 op struct location *loc;
273 02be96c6 2021-02-09 op if (v == NULL || path == NULL)
276 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
277 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
278 02be96c6 2021-02-09 op if (loc->reqca != NULL) {
279 49b73ba1 2021-02-10 op if (matches(loc->match, path))
280 02be96c6 2021-02-09 op return loc->reqca;
284 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
285 b8e64ccd 2021-03-31 op return loc->reqca;
289 793835cb 2021-02-23 op vhost_disable_log(struct vhost *v, const char *path)
291 793835cb 2021-02-23 op struct location *loc;
293 793835cb 2021-02-23 op if (v == NULL || path == NULL)
296 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
297 b8e64ccd 2021-03-31 op while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
298 793835cb 2021-02-23 op if (loc->disable_log && matches(loc->match, path))
302 b8e64ccd 2021-03-31 op loc = TAILQ_FIRST(&v->locations);
303 b8e64ccd 2021-03-31 op return loc->disable_log;
307 d3a08f4d 2021-01-17 op check_path(struct client *c, const char *path, int *fd)
309 d3a08f4d 2021-01-17 op struct stat sb;
310 d1ca3911 2021-01-21 op const char *p;
311 efb48052 2021-07-27 op int dirfd, strip;
313 d3a08f4d 2021-01-17 op assert(path != NULL);
316 fdea6aa0 2021-04-30 op * in send_dir we add an initial / (to be redirect-friendly),
317 fdea6aa0 2021-04-30 op * but here we want to skip it
319 fdea6aa0 2021-04-30 op if (*path == '/')
322 fdea6aa0 2021-04-30 op strip = vhost_strip(c->host, path);
323 fdea6aa0 2021-04-30 op p = strip_path(path, strip);
325 fdea6aa0 2021-04-30 op if (*p == '/')
327 fdea6aa0 2021-04-30 op if (*p == '\0')
330 1feaf2a6 2021-05-15 op dirfd = vhost_dirfd(c->host, path, &c->loc);
331 fdea6aa0 2021-04-30 op log_debug(c, "check_path: strip=%d path=%s original=%s",
332 fdea6aa0 2021-04-30 op strip, p, path);
333 efb48052 2021-07-27 op if (*fd == -1 && (*fd = openat(dirfd, p, O_RDONLY)) == -1)
334 d3a08f4d 2021-01-17 op return FILE_MISSING;
336 d3a08f4d 2021-01-17 op if (fstat(*fd, &sb) == -1) {
337 3abf91b0 2021-02-07 op log_notice(c, "failed stat for %s: %s", path, strerror(errno));
338 d3a08f4d 2021-01-17 op return FILE_MISSING;
341 d3a08f4d 2021-01-17 op if (S_ISDIR(sb.st_mode))
342 d3a08f4d 2021-01-17 op return FILE_DIRECTORY;
344 d3a08f4d 2021-01-17 op if (sb.st_mode & S_IXUSR)
345 d3a08f4d 2021-01-17 op return FILE_EXECUTABLE;
347 d3a08f4d 2021-01-17 op return FILE_EXISTS;
351 abc007d2 2021-02-08 op open_file(struct client *c)
353 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
354 d3a08f4d 2021-01-17 op case FILE_EXECUTABLE:
355 eecad7a3 2021-02-12 op if (c->host->cgi != NULL && matches(c->host->cgi, c->iri.path)) {
356 abc007d2 2021-02-08 op start_cgi(c->iri.path, "", c);
360 d3a08f4d 2021-01-17 op /* fallthrough */
362 d3a08f4d 2021-01-17 op case FILE_EXISTS:
363 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
364 27b2fa9a 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
367 d3a08f4d 2021-01-17 op case FILE_DIRECTORY:
371 d3a08f4d 2021-01-17 op case FILE_MISSING:
372 eecad7a3 2021-02-12 op if (c->host->cgi != NULL && matches(c->host->cgi, c->iri.path)) {
373 abc007d2 2021-02-08 op check_for_cgi(c);
376 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
380 d3a08f4d 2021-01-17 op /* unreachable */
386 d3a08f4d 2021-01-17 op * the inverse of this algorithm, i.e. starting from the start of the
387 d3a08f4d 2021-01-17 op * path + strlen(cgi), and checking if each component, should be
388 d3a08f4d 2021-01-17 op * faster. But it's tedious to write. This does the opposite: starts
389 d3a08f4d 2021-01-17 op * from the end and strip one component at a time, until either an
390 d3a08f4d 2021-01-17 op * executable is found or we emptied the path.
393 abc007d2 2021-02-08 op check_for_cgi(struct client *c)
395 2fafa2d2 2021-02-01 op char path[PATH_MAX];
398 2fafa2d2 2021-02-01 op strlcpy(path, c->iri.path, sizeof(path));
399 d3a08f4d 2021-01-17 op end = strchr(path, '\0');
401 d3a08f4d 2021-01-17 op while (end > path) {
403 571d20fb 2021-05-15 op * go up one level. UNIX paths are simple and POSIX
404 571d20fb 2021-05-15 op * dirname, with its ambiguities on if the given
405 571d20fb 2021-05-15 op * pointer is changed or not, gives me headaches.
407 3571854e 2021-09-24 op while (*end != '/' && end > path)
410 3571854e 2021-09-24 op if (end == path)
415 abc007d2 2021-02-08 op switch (check_path(c, path, &c->pfd)) {
416 d3a08f4d 2021-01-17 op case FILE_EXECUTABLE:
417 abc007d2 2021-02-08 op start_cgi(path, end+1, c);
419 d3a08f4d 2021-01-17 op case FILE_MISSING:
430 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
435 9b8f5ed2 2021-02-03 op mark_nonblock(int fd)
439 9b8f5ed2 2021-02-03 op if ((flags = fcntl(fd, F_GETFL)) == -1)
440 9b8f5ed2 2021-02-03 op fatal("fcntl(F_GETFL): %s", strerror(errno));
441 9b8f5ed2 2021-02-03 op if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
442 9b8f5ed2 2021-02-03 op fatal("fcntl(F_SETFL): %s", strerror(errno));
446 abc007d2 2021-02-08 op handle_handshake(int fd, short ev, void *d)
448 abc007d2 2021-02-08 op struct client *c = d;
449 d3a08f4d 2021-01-17 op struct vhost *h;
450 cc8c2901 2021-04-29 op struct alist *a;
451 d3a08f4d 2021-01-17 op const char *servname;
452 a8d4a897 2021-01-29 op const char *parse_err = "unknown error";
454 d3a08f4d 2021-01-17 op switch (tls_handshake(c->ctx)) {
455 d3a08f4d 2021-01-17 op case 0: /* success */
456 d3a08f4d 2021-01-17 op case -1: /* already handshaked */
458 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
459 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, handle_handshake, c, NULL);
461 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
462 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
465 d3a08f4d 2021-01-17 op /* unreachable */
469 79288c8b 2021-09-24 op if ((servname = tls_conn_servername(c->ctx)) == NULL) {
470 79288c8b 2021-09-24 op log_debug(c, "handshake: missing SNI");
474 a8d4a897 2021-01-29 op if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
475 3abf91b0 2021-02-07 op log_info(c, "puny_decode: %s", parse_err);
479 b8e64ccd 2021-03-31 op TAILQ_FOREACH(h, &hosts, vhosts) {
480 eecad7a3 2021-02-12 op if (matches(h->domain, c->domain))
482 cc8c2901 2021-04-29 op TAILQ_FOREACH(a, &h->aliases, aliases) {
483 cc8c2901 2021-04-29 op if (matches(a->alias, c->domain))
489 3abf91b0 2021-02-07 op log_debug(c, "handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
490 3abf91b0 2021-02-07 op servname != NULL ? servname : "(null)",
492 b8e64ccd 2021-03-31 op h != NULL ? h->domain : "(null)");
494 b8e64ccd 2021-03-31 op if (h != NULL) {
497 efe7d180 2021-10-02 op c->bev = bufferevent_new(fd, client_read, client_write,
498 efe7d180 2021-10-02 op client_error, c);
499 efe7d180 2021-10-02 op if (c->bev == NULL)
500 efe7d180 2021-10-02 op fatal("%s: failed to allocate client buffer: %s",
501 efe7d180 2021-10-02 op __func__, strerror(errno));
503 efe7d180 2021-10-02 op event_set(&c->bev->ev_read, c->fd, EV_READ,
504 efe7d180 2021-10-02 op client_tls_readcb, c->bev);
505 efe7d180 2021-10-02 op event_set(&c->bev->ev_write, c->fd, EV_WRITE,
506 efe7d180 2021-10-02 op client_tls_writecb, c->bev);
508 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EV_READ);
514 abc007d2 2021-02-08 op start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
517 91b9f2a8 2021-05-15 op static const char *
518 91b9f2a8 2021-05-15 op strip_path(const char *path, int strip)
522 6abda252 2021-02-06 op while (strip > 0) {
523 6abda252 2021-02-06 op if ((t = strchr(path, '/')) == NULL) {
524 6abda252 2021-02-06 op path = strchr(path, '\0');
535 57ec3e77 2021-02-08 op fmt_sbuf(const char *fmt, struct client *c, const char *path)
538 57ec3e77 2021-02-08 op char buf[32];
540 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
541 6abda252 2021-02-06 op for (i = 0; *fmt; ++fmt) {
542 6abda252 2021-02-06 op if (i == sizeof(buf)-1 || *fmt == '%') {
543 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
544 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
548 6abda252 2021-02-06 op if (*fmt != '%') {
549 6abda252 2021-02-06 op buf[i++] = *fmt;
553 6abda252 2021-02-06 op switch (*++fmt) {
555 6abda252 2021-02-06 op strlcat(c->sbuf, "%", sizeof(c->sbuf));
558 737a6b50 2021-04-30 op if (*path != '/')
559 737a6b50 2021-04-30 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
560 6abda252 2021-02-06 op strlcat(c->sbuf, path, sizeof(c->sbuf));
563 6abda252 2021-02-06 op strlcat(c->sbuf, c->iri.query, sizeof(c->sbuf));
566 6abda252 2021-02-06 op snprintf(buf, sizeof(buf), "%d", conf.port);
567 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
568 6abda252 2021-02-06 op memset(buf, 0, sizeof(buf));
571 6abda252 2021-02-06 op strlcat(c->sbuf, c->domain, sizeof(c->sbuf));
574 6abda252 2021-02-06 op fatal("%s: unknown fmt specifier %c",
575 6abda252 2021-02-06 op __func__, *fmt);
580 6abda252 2021-02-06 op strlcat(c->sbuf, buf, sizeof(c->sbuf));
583 57ec3e77 2021-02-08 op /* 1 if a matching `block return' (and apply it), 0 otherwise */
585 57ec3e77 2021-02-08 op apply_block_return(struct client *c)
587 57ec3e77 2021-02-08 op const char *fmt, *path;
590 57ec3e77 2021-02-08 op if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
593 57ec3e77 2021-02-08 op path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
594 57ec3e77 2021-02-08 op fmt_sbuf(fmt, c, path);
596 abc007d2 2021-02-08 op start_reply(c, code, c->sbuf);
600 8ad1c570 2021-05-09 op /* 1 if matching `fcgi' (and apply it), 0 otherwise */
602 8ad1c570 2021-05-09 op apply_fastcgi(struct client *c)
605 8ad1c570 2021-05-09 op struct fcgi *f;
607 8ad1c570 2021-05-09 op if ((id = vhost_fastcgi(c->host, c->iri.path)) == -1)
610 8ad1c570 2021-05-09 op switch ((f = &fcgi[id])->s) {
611 8ad1c570 2021-05-09 op case FCGI_OFF:
612 8ad1c570 2021-05-09 op f->s = FCGI_INFLIGHT;
613 8ad1c570 2021-05-09 op log_info(c, "opening fastcgi connection for (%s,%s,%s)",
614 8ad1c570 2021-05-09 op f->path, f->port, f->prog);
615 8ad1c570 2021-05-09 op imsg_compose(&exibuf, IMSG_FCGI_REQ, 0, 0, -1,
616 8ad1c570 2021-05-09 op &id, sizeof(id));
617 8ad1c570 2021-05-09 op imsg_flush(&exibuf);
618 8ad1c570 2021-05-09 op /* fallthrough */
619 8ad1c570 2021-05-09 op case FCGI_INFLIGHT:
620 8ad1c570 2021-05-09 op c->fcgi = id;
622 8ad1c570 2021-05-09 op case FCGI_READY:
623 8ad1c570 2021-05-09 op c->fcgi = id;
624 741b69be 2021-09-26 op fcgi_req(f, c);
631 02be96c6 2021-02-09 op /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
633 02be96c6 2021-02-09 op apply_require_ca(struct client *c)
635 02be96c6 2021-02-09 op X509_STORE *store;
636 02be96c6 2021-02-09 op const uint8_t *cert;
639 02be96c6 2021-02-09 op if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
642 02be96c6 2021-02-09 op if (!tls_peer_cert_provided(c->ctx)) {
643 02be96c6 2021-02-09 op start_reply(c, CLIENT_CERT_REQ, "client certificate required");
647 02be96c6 2021-02-09 op cert = tls_peer_cert_chain_pem(c->ctx, &len);
648 02be96c6 2021-02-09 op if (!validate_against_ca(store, cert, len)) {
649 02be96c6 2021-02-09 op start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
656 b8e64ccd 2021-03-31 op static size_t
657 b8e64ccd 2021-03-31 op host_nth(struct vhost *h)
659 b8e64ccd 2021-03-31 op struct vhost *v;
660 b8e64ccd 2021-03-31 op size_t i = 0;
662 b8e64ccd 2021-03-31 op TAILQ_FOREACH(v, &hosts, vhosts) {
672 abc007d2 2021-02-08 op start_cgi(const char *spath, const char *relpath, struct client *c)
674 d3a08f4d 2021-01-17 op char addr[NI_MAXHOST];
675 bc99d868 2021-03-19 op const char *t;
676 bc99d868 2021-03-19 op struct cgireq req;
679 efe7d180 2021-10-02 op c->type = REQUEST_CGI;
681 d3a08f4d 2021-01-17 op e = getnameinfo((struct sockaddr*)&c->addr, sizeof(c->addr),
682 d3a08f4d 2021-01-17 op addr, sizeof(addr),
684 d3a08f4d 2021-01-17 op NI_NUMERICHOST);
686 bc99d868 2021-03-19 op fatal("getnameinfo failed");
688 bc99d868 2021-03-19 op memset(&req, 0, sizeof(req));
690 bc99d868 2021-03-19 op memcpy(req.buf, c->req, sizeof(req.buf));
692 bc99d868 2021-03-19 op req.iri_schema_off = c->iri.schema - c->req;
693 bc99d868 2021-03-19 op req.iri_host_off = c->iri.host - c->req;
694 bc99d868 2021-03-19 op req.iri_port_off = c->iri.port - c->req;
695 bc99d868 2021-03-19 op req.iri_path_off = c->iri.path - c->req;
696 bc99d868 2021-03-19 op req.iri_query_off = c->iri.query - c->req;
697 bc99d868 2021-03-19 op req.iri_fragment_off = c->iri.fragment - c->req;
699 bc99d868 2021-03-19 op req.iri_portno = c->iri.port_no;
701 bc99d868 2021-03-19 op strlcpy(req.spath, spath, sizeof(req.spath));
702 bc99d868 2021-03-19 op strlcpy(req.relpath, relpath, sizeof(req.relpath));
703 bc99d868 2021-03-19 op strlcpy(req.addr, addr, sizeof(req.addr));
705 bc99d868 2021-03-19 op if ((t = tls_peer_cert_subject(c->ctx)) != NULL)
706 bc99d868 2021-03-19 op strlcpy(req.subject, t, sizeof(req.subject));
707 bc99d868 2021-03-19 op if ((t = tls_peer_cert_issuer(c->ctx)) != NULL)
708 bc99d868 2021-03-19 op strlcpy(req.issuer, t, sizeof(req.issuer));
709 bc99d868 2021-03-19 op if ((t = tls_peer_cert_hash(c->ctx)) != NULL)
710 bc99d868 2021-03-19 op strlcpy(req.hash, t, sizeof(req.hash));
711 89541eee 2021-04-13 op if ((t = tls_conn_version(c->ctx)) != NULL)
712 89541eee 2021-04-13 op strlcpy(req.version, t, sizeof(req.version));
713 89541eee 2021-04-13 op if ((t = tls_conn_cipher(c->ctx)) != NULL)
714 89541eee 2021-04-13 op strlcpy(req.cipher, t, sizeof(req.cipher));
716 89541eee 2021-04-13 op req.cipher_strength = tls_conn_cipher_strength(c->ctx);
717 bc99d868 2021-03-19 op req.notbefore = tls_peer_cert_notbefore(c->ctx);
718 bc99d868 2021-03-19 op req.notafter = tls_peer_cert_notafter(c->ctx);
720 b8e64ccd 2021-03-31 op req.host_off = host_nth(c->host);
721 1feaf2a6 2021-05-15 op req.loc_off = c->loc;
723 bc99d868 2021-03-19 op imsg_compose(&exibuf, IMSG_CGI_REQ, c->id, 0, -1, &req, sizeof(req));
724 bc99d868 2021-03-19 op imsg_flush(&exibuf);
726 bc99d868 2021-03-19 op close(c->pfd);
730 abc007d2 2021-02-08 op open_dir(struct client *c)
733 11c98667 2021-04-25 op int dirfd, root;
734 252908e6 2021-01-24 op char *before_file;
736 11c98667 2021-04-25 op root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
738 0be51733 2021-01-20 op len = strlen(c->iri.path);
739 252908e6 2021-01-24 op if (len > 0 && !ends_with(c->iri.path, "/")) {
740 abc007d2 2021-02-08 op redirect_canonical_dir(c);
744 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
745 d1ca3911 2021-01-21 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
746 d1ca3911 2021-01-21 op if (!ends_with(c->sbuf, "/"))
747 0be51733 2021-01-20 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
748 252908e6 2021-01-24 op before_file = strchr(c->sbuf, '\0');
749 c8b74339 2021-01-24 op len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
750 c8b74339 2021-01-24 op sizeof(c->sbuf));
751 252908e6 2021-01-24 op if (len >= sizeof(c->sbuf)) {
752 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
756 252908e6 2021-01-24 op c->iri.path = c->sbuf;
758 252908e6 2021-01-24 op /* close later unless we have to generate the dir listing */
759 abc007d2 2021-02-08 op dirfd = c->pfd;
762 abc007d2 2021-02-08 op switch (check_path(c, c->iri.path, &c->pfd)) {
763 252908e6 2021-01-24 op case FILE_EXECUTABLE:
764 eecad7a3 2021-02-12 op if (c->host->cgi != NULL && matches(c->host->cgi, c->iri.path)) {
765 abc007d2 2021-02-08 op start_cgi(c->iri.path, "", c);
769 252908e6 2021-01-24 op /* fallthrough */
771 252908e6 2021-01-24 op case FILE_EXISTS:
772 efe7d180 2021-10-02 op c->type = REQUEST_FILE;
773 98ee8406 2021-02-12 op start_reply(c, SUCCESS, mime(c->host, c->iri.path));
776 252908e6 2021-01-24 op case FILE_DIRECTORY:
777 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
780 252908e6 2021-01-24 op case FILE_MISSING:
781 252908e6 2021-01-24 op *before_file = '\0';
783 252908e6 2021-01-24 op if (!vhost_auto_index(c->host, c->iri.path)) {
784 abc007d2 2021-02-08 op start_reply(c, NOT_FOUND, "not found");
788 efe7d180 2021-10-02 op c->type = REQUEST_DIR;
790 e76f2c74 2021-04-25 op c->dirlen = scandir_fd(dirfd, &c->dir,
791 11c98667 2021-04-25 op root ? select_non_dotdot : select_non_dot,
793 11c98667 2021-04-25 op if (c->dirlen == -1) {
794 11c98667 2021-04-25 op log_err(c, "scandir_fd(%d) (vhost:%s) %s: %s",
795 abc007d2 2021-02-08 op c->pfd, c->host->domain, c->iri.path, strerror(errno));
796 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
799 11c98667 2021-04-25 op c->diroff = 0;
802 abc007d2 2021-02-08 op start_reply(c, SUCCESS, "text/gemini");
803 efe7d180 2021-10-02 op evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
804 efe7d180 2021-10-02 op "# Index of %s\n\n", c->iri.path);
808 252908e6 2021-01-24 op /* unreachable */
812 252908e6 2021-01-24 op close(dirfd);
816 abc007d2 2021-02-08 op redirect_canonical_dir(struct client *c)
820 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
821 252908e6 2021-01-24 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
822 252908e6 2021-01-24 op len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
824 0be51733 2021-01-20 op if (len >= sizeof(c->sbuf)) {
825 abc007d2 2021-02-08 op start_reply(c, TEMP_FAILURE, "internal server error");
829 abc007d2 2021-02-08 op start_reply(c, TEMP_REDIRECT, c->sbuf);
833 efe7d180 2021-10-02 op client_tls_readcb(int fd, short event, void *d)
835 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
836 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
839 efe7d180 2021-10-02 op int what = EVBUFFER_READ;
840 efe7d180 2021-10-02 op int howmuch = IBUF_READ_SIZE;
841 efe7d180 2021-10-02 op char buf[IBUF_READ_SIZE];
843 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
844 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
848 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0)
849 efe7d180 2021-10-02 op howmuch = MIN(sizeof(buf), bufev->wm_read.high);
851 efe7d180 2021-10-02 op switch (ret = tls_read(client->ctx, buf, howmuch)) {
852 efe7d180 2021-10-02 op case TLS_WANT_POLLIN:
853 efe7d180 2021-10-02 op case TLS_WANT_POLLOUT:
856 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
861 efe7d180 2021-10-02 op if (len == 0) {
862 efe7d180 2021-10-02 op what |= EVBUFFER_EOF;
866 efe7d180 2021-10-02 op if (evbuffer_add(bufev->input, buf, len) == -1) {
867 efe7d180 2021-10-02 op what |= EVBUFFER_ERROR;
871 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
872 efe7d180 2021-10-02 op if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
874 efe7d180 2021-10-02 op if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
876 efe7d180 2021-10-02 op * here we could implement a read pressure policy.
880 efe7d180 2021-10-02 op if (bufev->readcb != NULL)
881 efe7d180 2021-10-02 op (*bufev->readcb)(bufev, bufev->cbarg);
886 efe7d180 2021-10-02 op event_add(&bufev->ev_read, NULL);
890 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
894 efe7d180 2021-10-02 op client_tls_writecb(int fd, short event, void *d)
896 efe7d180 2021-10-02 op struct bufferevent *bufev = d;
897 efe7d180 2021-10-02 op struct client *client = bufev->cbarg;
900 efe7d180 2021-10-02 op short what = EVBUFFER_WRITE;
902 efe7d180 2021-10-02 op if (event == EV_TIMEOUT) {
903 efe7d180 2021-10-02 op what |= EVBUFFER_TIMEOUT;
907 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0) {
908 efe7d180 2021-10-02 op ret = tls_write(client->ctx,
909 efe7d180 2021-10-02 op EVBUFFER_DATA(bufev->output),
910 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output));
911 efe7d180 2021-10-02 op switch (ret) {
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;
920 efe7d180 2021-10-02 op evbuffer_drain(bufev->output, len);
923 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(bufev->output) != 0)
924 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
926 efe7d180 2021-10-02 op if (bufev->writecb != NULL &&
927 efe7d180 2021-10-02 op EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
928 efe7d180 2021-10-02 op (*bufev->writecb)(bufev, bufev->cbarg);
932 efe7d180 2021-10-02 op event_add(&bufev->ev_write, NULL);
935 efe7d180 2021-10-02 op log_err(client, "tls error: %s", tls_error(client->ctx));
936 efe7d180 2021-10-02 op (*bufev->errorcb)(bufev, what, bufev->cbarg);
940 efe7d180 2021-10-02 op client_read(struct bufferevent *bev, void *d)
942 efe7d180 2021-10-02 op struct client *c = d;
943 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
944 efe7d180 2021-10-02 op const char *parse_err = "invalid request";
945 efe7d180 2021-10-02 op char decoded[DOMAIN_NAME_LEN];
948 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ);
950 efe7d180 2021-10-02 op /* max url len + \r\n */
951 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(src) > 1024 + 2) {
952 efe7d180 2021-10-02 op log_err(c, "too much data received");
953 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "bad request");
957 efe7d180 2021-10-02 op c->req = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
958 efe7d180 2021-10-02 op if (c->req == NULL) {
959 efe7d180 2021-10-02 op /* not enough data yet. */
960 efe7d180 2021-10-02 op bufferevent_enable(bev, EVBUFFER_READ);
964 efe7d180 2021-10-02 op if (!parse_iri(c->req, &c->iri, &parse_err) ||
965 efe7d180 2021-10-02 op !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
966 efe7d180 2021-10-02 op log_err(c, "IRI parse error: %s", parse_err);
967 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "bad request");
971 efe7d180 2021-10-02 op if (c->iri.port_no != conf.port ||
972 efe7d180 2021-10-02 op strcmp(c->iri.schema, "gemini") ||
973 efe7d180 2021-10-02 op strcmp(decoded, c->domain)) {
974 efe7d180 2021-10-02 op start_reply(c, PROXY_REFUSED, "won't proxy request");
978 efe7d180 2021-10-02 op if (apply_require_ca(c) ||
979 efe7d180 2021-10-02 op apply_block_return(c)||
980 efe7d180 2021-10-02 op apply_fastcgi(c))
983 efe7d180 2021-10-02 op if (c->host->entrypoint != NULL) {
985 efe7d180 2021-10-02 op start_cgi(c->host->entrypoint, c->iri.path, c);
989 efe7d180 2021-10-02 op open_file(c);
993 efe7d180 2021-10-02 op client_write(struct bufferevent *bev, void *d)
995 efe7d180 2021-10-02 op struct client *c = d;
996 efe7d180 2021-10-02 op struct evbuffer *out = EVBUFFER_OUTPUT(bev);
997 efe7d180 2021-10-02 op char buf[BUFSIZ];
1000 efe7d180 2021-10-02 op switch (c->type) {
1001 efe7d180 2021-10-02 op case REQUEST_UNDECIDED:
1003 efe7d180 2021-10-02 op * Ignore spurious calls when we still don't have idea
1004 efe7d180 2021-10-02 op * what to do with the request.
1008 efe7d180 2021-10-02 op case REQUEST_FILE:
1009 efe7d180 2021-10-02 op if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1010 efe7d180 2021-10-02 op log_warn(c, "read: %s", strerror(errno));
1011 efe7d180 2021-10-02 op client_error(bev, EVBUFFER_ERROR, c);
1013 efe7d180 2021-10-02 op } else if (r == 0) {
1014 efe7d180 2021-10-02 op client_close(c);
1016 efe7d180 2021-10-02 op } else if (r != sizeof(buf))
1017 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1018 efe7d180 2021-10-02 op bufferevent_write(bev, buf, r);
1021 efe7d180 2021-10-02 op case REQUEST_DIR:
1022 efe7d180 2021-10-02 op /* TODO: handle big big directories better */
1023 efe7d180 2021-10-02 op for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1024 efe7d180 2021-10-02 op evbuffer_add_printf(out, "=> %s\n",
1025 efe7d180 2021-10-02 op c->dir[c->diroff]->d_name);
1026 efe7d180 2021-10-02 op free(c->dir[c->diroff]);
1028 efe7d180 2021-10-02 op free(c->dir);
1029 efe7d180 2021-10-02 op c->dir = NULL;
1031 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1033 efe7d180 2021-10-02 op event_add(&c->bev->ev_write, NULL);
1036 efe7d180 2021-10-02 op case REQUEST_CGI:
1037 efe7d180 2021-10-02 op case REQUEST_FCGI:
1039 efe7d180 2021-10-02 op * Here we depend on on the cgi script or fastcgi
1040 efe7d180 2021-10-02 op * connection to provide data.
1044 efe7d180 2021-10-02 op case REQUEST_DONE:
1045 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(out) == 0)
1046 efe7d180 2021-10-02 op client_close(c);
1052 efe7d180 2021-10-02 op client_error(struct bufferevent *bev, short error, void *d)
1054 efe7d180 2021-10-02 op struct client *c = d;
1056 efe7d180 2021-10-02 op if (c->type == REQUEST_FCGI)
1057 efe7d180 2021-10-02 op fcgi_abort_request(c);
1059 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1061 efe7d180 2021-10-02 op if (error & EVBUFFER_TIMEOUT) {
1062 efe7d180 2021-10-02 op log_warn(c, "timeout reached, "
1063 efe7d180 2021-10-02 op "forcefully closing the connection");
1064 efe7d180 2021-10-02 op if (c->code == 0)
1065 efe7d180 2021-10-02 op start_reply(c, BAD_REQUEST, "timeout");
1067 efe7d180 2021-10-02 op client_close(c);
1071 efe7d180 2021-10-02 op if (error & EVBUFFER_EOF) {
1072 efe7d180 2021-10-02 op client_close(c);
1076 efe7d180 2021-10-02 op log_err(c, "unknown bufferevent error: %s", strerror(errno));
1077 efe7d180 2021-10-02 op client_close(c);
1081 efe7d180 2021-10-02 op start_reply(struct client *c, int code, const char *meta)
1083 efe7d180 2021-10-02 op struct evbuffer *evb = EVBUFFER_OUTPUT(c->bev);
1084 efe7d180 2021-10-02 op const char *lang;
1087 efe7d180 2021-10-02 op bufferevent_enable(c->bev, EVBUFFER_WRITE);
1089 efe7d180 2021-10-02 op c->code = code;
1090 efe7d180 2021-10-02 op c->meta = meta;
1092 efe7d180 2021-10-02 op r = evbuffer_add_printf(evb, "%d %s", code, meta);
1093 efe7d180 2021-10-02 op if (r == -1)
1096 efe7d180 2021-10-02 op /* 2 digit status + space + 1024 max reply */
1097 efe7d180 2021-10-02 op if (r > 1027)
1098 efe7d180 2021-10-02 op goto overflow;
1100 efe7d180 2021-10-02 op if (c->type != REQUEST_CGI &&
1101 efe7d180 2021-10-02 op c->type != REQUEST_FCGI &&
1102 efe7d180 2021-10-02 op !strcmp(meta, "text/gemini") &&
1103 efe7d180 2021-10-02 op (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1104 efe7d180 2021-10-02 op rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1105 efe7d180 2021-10-02 op if (rr == -1)
1107 efe7d180 2021-10-02 op if (r + rr > 1027)
1108 efe7d180 2021-10-02 op goto overflow;
1111 efe7d180 2021-10-02 op bufferevent_write(c->bev, "\r\n", 2);
1113 efe7d180 2021-10-02 op if (!vhost_disable_log(c->host, c->iri.path))
1114 efe7d180 2021-10-02 op log_request(c, EVBUFFER_DATA(evb), EVBUFFER_LENGTH(evb));
1116 efe7d180 2021-10-02 op if (code != 20 && IS_INTERNAL_REQUEST(c->type))
1117 efe7d180 2021-10-02 op c->type = REQUEST_DONE;
1122 efe7d180 2021-10-02 op log_err(c, "evbuffer_add_printf error: no memory");
1123 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1124 efe7d180 2021-10-02 op client_close(c);
1128 efe7d180 2021-10-02 op log_warn(c, "reply header overflow");
1129 efe7d180 2021-10-02 op evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1130 efe7d180 2021-10-02 op start_reply(c, TEMP_FAILURE, "internal error");
1134 efe7d180 2021-10-02 op client_close_ev(int fd, short event, void *d)
1136 8ad1c570 2021-05-09 op struct client *c = d;
1138 d3a08f4d 2021-01-17 op switch (tls_close(c->ctx)) {
1139 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
1140 efe7d180 2021-10-02 op event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1142 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
1143 efe7d180 2021-10-02 op event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1147 d3a08f4d 2021-01-17 op connected_clients--;
1149 d3a08f4d 2021-01-17 op tls_free(c->ctx);
1150 d3a08f4d 2021-01-17 op c->ctx = NULL;
1152 efe7d180 2021-10-02 op free(c->header);
1154 abc007d2 2021-02-08 op if (c->pfd != -1)
1155 abc007d2 2021-02-08 op close(c->pfd);
1157 252908e6 2021-01-24 op if (c->dir != NULL)
1158 11c98667 2021-04-25 op free(c->dir);
1160 abc007d2 2021-02-08 op close(c->fd);
1165 efe7d180 2021-10-02 op client_close(struct client *c)
1168 efe7d180 2021-10-02 op * We may end up calling client_close in various situations
1169 efe7d180 2021-10-02 op * and for the most unexpected reasons. Therefore, we need to
1170 efe7d180 2021-10-02 op * ensure that everything is properly released once we reach
1171 efe7d180 2021-10-02 op * this point.
1174 efe7d180 2021-10-02 op if (c->type == REQUEST_FCGI)
1175 efe7d180 2021-10-02 op fcgi_abort_request(c);
1177 efe7d180 2021-10-02 op if (c->cgibev != NULL) {
1178 efe7d180 2021-10-02 op bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1179 efe7d180 2021-10-02 op bufferevent_free(c->cgibev);
1180 efe7d180 2021-10-02 op c->cgibev = NULL;
1181 efe7d180 2021-10-02 op close(c->pfd);
1182 efe7d180 2021-10-02 op c->pfd = -1;
1185 efe7d180 2021-10-02 op bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1186 efe7d180 2021-10-02 op bufferevent_free(c->bev);
1187 efe7d180 2021-10-02 op c->bev = NULL;
1189 efe7d180 2021-10-02 op client_close_ev(c->fd, 0, c);
1193 efe7d180 2021-10-02 op cgi_read(struct bufferevent *bev, void *d)
1195 efe7d180 2021-10-02 op struct client *client = d;
1196 efe7d180 2021-10-02 op struct evbuffer *src = EVBUFFER_INPUT(bev);
1197 efe7d180 2021-10-02 op char *header;
1201 efe7d180 2021-10-02 op /* intercept the header */
1202 efe7d180 2021-10-02 op if (client->code == 0) {
1203 efe7d180 2021-10-02 op header = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
1204 efe7d180 2021-10-02 op if (header == NULL) {
1205 efe7d180 2021-10-02 op /* max reply + \r\n */
1206 efe7d180 2021-10-02 op if (EVBUFFER_LENGTH(src) > 1026) {
1207 efe7d180 2021-10-02 op log_warn(client, "CGI script is trying to "
1208 efe7d180 2021-10-02 op "send a header too long.");
1209 efe7d180 2021-10-02 op cgi_error(bev, EVBUFFER_READ, client);
1212 efe7d180 2021-10-02 op /* wait a bit */
1216 efe7d180 2021-10-02 op if (len < 3 || len > 1029 ||
1217 efe7d180 2021-10-02 op !isdigit(header[0]) ||
1218 efe7d180 2021-10-02 op !isdigit(header[1]) ||
1219 efe7d180 2021-10-02 op !isspace(header[2])) {
1220 efe7d180 2021-10-02 op free(header);
1221 efe7d180 2021-10-02 op log_warn(client, "CGI script is trying to send a "
1222 efe7d180 2021-10-02 op "malformed header");
1223 efe7d180 2021-10-02 op cgi_error(bev, EVBUFFER_READ, client);
1227 efe7d180 2021-10-02 op client->header = header;
1228 efe7d180 2021-10-02 op code = (header[0] - '0') * 10 + (header[1] - '0');
1230 efe7d180 2021-10-02 op if (code < 10 || code >= 70) {
1231 efe7d180 2021-10-02 op log_warn(client, "CGI script is trying to send an "
1232 efe7d180 2021-10-02 op "invalid reply code (%d)", code);
1233 efe7d180 2021-10-02 op cgi_error(bev, EVBUFFER_READ, client);
1237 efe7d180 2021-10-02 op start_reply(client, code, header + 3);
1239 efe7d180 2021-10-02 op if (client->code < 20 || client->code > 29) {
1240 efe7d180 2021-10-02 op cgi_error(client->cgibev, EVBUFFER_EOF, client);
1245 efe7d180 2021-10-02 op bufferevent_write_buffer(client->bev, src);
1249 efe7d180 2021-10-02 op cgi_write(struct bufferevent *bev, void *d)
1252 efe7d180 2021-10-02 op * Never called. We don't send data to a CGI script.
1258 efe7d180 2021-10-02 op cgi_error(struct bufferevent *bev, short error, void *d)
1260 efe7d180 2021-10-02 op struct client *client = d;
1262 efe7d180 2021-10-02 op if (error & EVBUFFER_ERROR)
1263 efe7d180 2021-10-02 op log_err(client, "%s: evbuffer error (%x): %s",
1264 efe7d180 2021-10-02 op __func__, error, strerror(errno));
1266 efe7d180 2021-10-02 op bufferevent_disable(bev, EVBUFFER_READ|EVBUFFER_WRITE);
1267 efe7d180 2021-10-02 op bufferevent_free(bev);
1268 efe7d180 2021-10-02 op client->cgibev = NULL;
1270 efe7d180 2021-10-02 op close(client->pfd);
1271 efe7d180 2021-10-02 op client->pfd = -1;
1273 efe7d180 2021-10-02 op client->type = REQUEST_DONE;
1274 efe7d180 2021-10-02 op if (client->code != 0)
1275 efe7d180 2021-10-02 op client_write(client->bev, client);
1277 efe7d180 2021-10-02 op start_reply(client, CGI_ERROR, "CGI error");
1281 abc007d2 2021-02-08 op do_accept(int sock, short et, void *d)
1283 abc007d2 2021-02-08 op struct client *c;
1284 d3a08f4d 2021-01-17 op struct sockaddr_storage addr;
1285 abc007d2 2021-02-08 op struct sockaddr *saddr;
1286 d3a08f4d 2021-01-17 op socklen_t len;
1291 abc007d2 2021-02-08 op saddr = (struct sockaddr*)&addr;
1292 d3a08f4d 2021-01-17 op len = sizeof(addr);
1293 3cb3dd4d 2021-02-12 op if ((fd = accept(sock, saddr, &len)) == -1) {
1294 cfb8a77f 2021-02-07 op if (errno == EWOULDBLOCK || errno == EAGAIN)
1296 d3a08f4d 2021-01-17 op fatal("accept: %s", strerror(errno));
1299 3cb3dd4d 2021-02-12 op mark_nonblock(fd);
1301 d3a08f4d 2021-01-17 op for (i = 0; i < MAX_USERS; ++i) {
1302 bc99d868 2021-03-19 op c = &clients[i];
1303 abc007d2 2021-02-08 op if (c->fd == -1) {
1304 abc007d2 2021-02-08 op memset(c, 0, sizeof(*c));
1306 bc99d868 2021-03-19 op if (tls_accept_socket(ctx, &c->ctx, fd) == -1)
1307 d3a08f4d 2021-01-17 op break; /* goodbye fd! */
1310 abc007d2 2021-02-08 op c->pfd = -1;
1311 abc007d2 2021-02-08 op c->dir = NULL;
1312 abc007d2 2021-02-08 op c->addr = addr;
1313 8ad1c570 2021-05-09 op c->fcgi = -1;
1315 efe7d180 2021-10-02 op event_once(c->fd, EV_READ|EV_WRITE, handle_handshake,
1318 d3a08f4d 2021-01-17 op connected_clients++;
1326 8ad1c570 2021-05-09 op static struct client *
1327 bc99d868 2021-03-19 op client_by_id(int id)
1329 bc99d868 2021-03-19 op if ((size_t)id > sizeof(clients)/sizeof(clients[0]))
1330 bc99d868 2021-03-19 op fatal("in client_by_id: invalid id %d", id);
1331 bc99d868 2021-03-19 op return &clients[id];
1334 8ad1c570 2021-05-09 op struct client *
1335 8ad1c570 2021-05-09 op try_client_by_id(int id)
1337 8ad1c570 2021-05-09 op if ((size_t)id > sizeof(clients)/sizeof(clients[0]))
1338 8ad1c570 2021-05-09 op return NULL;
1339 8ad1c570 2021-05-09 op return &clients[id];
1343 bc99d868 2021-03-19 op handle_imsg_cgi_res(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1345 bc99d868 2021-03-19 op struct client *c;
1347 bc99d868 2021-03-19 op c = client_by_id(imsg->hdr.peerid);
1349 efe7d180 2021-10-02 op if ((c->pfd = imsg->fd) == -1) {
1350 bc99d868 2021-03-19 op start_reply(c, TEMP_FAILURE, "internal server error");
1354 efe7d180 2021-10-02 op c->type = REQUEST_CGI;
1356 efe7d180 2021-10-02 op c->cgibev = bufferevent_new(c->pfd, cgi_read, cgi_write,
1357 efe7d180 2021-10-02 op cgi_error, c);
1359 efe7d180 2021-10-02 op bufferevent_enable(c->cgibev, EV_READ);
1363 8ad1c570 2021-05-09 op handle_imsg_fcgi_fd(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1365 8ad1c570 2021-05-09 op struct client *c;
1366 8ad1c570 2021-05-09 op struct fcgi *f;
1369 8ad1c570 2021-05-09 op id = imsg->hdr.peerid;
1370 8ad1c570 2021-05-09 op f = &fcgi[id];
1372 741b69be 2021-09-26 op if ((f->fd = imsg->fd) == -1)
1373 8ad1c570 2021-05-09 op f->s = FCGI_OFF;
1375 741b69be 2021-09-26 op mark_nonblock(f->fd);
1377 741b69be 2021-09-26 op f->s = FCGI_READY;
1379 741b69be 2021-09-26 op f->bev = bufferevent_new(f->fd, fcgi_read, fcgi_write,
1380 741b69be 2021-09-26 op fcgi_error, f);
1381 741b69be 2021-09-26 op if (f->bev == NULL) {
1382 741b69be 2021-09-26 op close(f->fd);
1383 741b69be 2021-09-26 op log_err(NULL, "%s: failed to allocate client buffer",
1385 741b69be 2021-09-26 op f->s = FCGI_OFF;
1388 741b69be 2021-09-26 op bufferevent_enable(f->bev, EV_READ|EV_WRITE);
1391 8ad1c570 2021-05-09 op for (i = 0; i < MAX_USERS; ++i) {
1392 8ad1c570 2021-05-09 op c = &clients[i];
1393 8ad1c570 2021-05-09 op if (c->fd == -1)
1395 8ad1c570 2021-05-09 op if (c->fcgi != id)
1398 741b69be 2021-09-26 op if (f->s == FCGI_OFF) {
1399 8ad1c570 2021-05-09 op c->fcgi = -1;
1400 8ad1c570 2021-05-09 op start_reply(c, TEMP_FAILURE, "internal server error");
1402 741b69be 2021-09-26 op fcgi_req(f, c);
1407 bc99d868 2021-03-19 op handle_imsg_quit(struct imsgbuf *ibuf, struct imsg *imsg, size_t len)
1415 a8a1f439 2021-07-07 op * don't call event_loopbreak since we want to finish to
1416 a8a1f439 2021-07-07 op * handle the ongoing connections.
1419 090b8a89 2021-07-06 op shutting_down = 1;
1421 a6e689d7 2021-02-12 op event_del(&e4);
1422 a6e689d7 2021-02-12 op if (has_ipv6)
1423 a6e689d7 2021-02-12 op event_del(&e6);
1424 a6e689d7 2021-02-12 op if (has_siginfo)
1425 a6e689d7 2021-02-12 op signal_del(&siginfo);
1426 bc99d868 2021-03-19 op event_del(&imsgev);
1427 a6e689d7 2021-02-12 op signal_del(&sigusr2);
1429 090b8a89 2021-07-06 op for (i = 0; i < FCGI_MAX; ++i) {
1430 090b8a89 2021-07-06 op if (fcgi[i].path == NULL && fcgi[i].prog == NULL)
1433 741b69be 2021-09-26 op if (fcgi[i].bev == NULL || fcgi[i].pending != 0)
1436 090b8a89 2021-07-06 op fcgi_close_backend(&fcgi[i]);
1441 bc99d868 2021-03-19 op handle_dispatch_imsg(int fd, short ev, void *d)
1443 bc99d868 2021-03-19 op struct imsgbuf *ibuf = d;
1444 bc99d868 2021-03-19 op dispatch_imsg(ibuf, handlers, sizeof(handlers));
1448 abc007d2 2021-02-08 op handle_siginfo(int fd, short ev, void *d)
1454 abc007d2 2021-02-08 op log_info(NULL, "%d connected clients", connected_clients);
1458 bc99d868 2021-03-19 op loop(struct tls *ctx_, int sock4, int sock6, struct imsgbuf *ibuf)
1464 abc007d2 2021-02-08 op event_init();
1466 bc99d868 2021-03-19 op memset(&clients, 0, sizeof(clients));
1467 abc007d2 2021-02-08 op for (i = 0; i < MAX_USERS; ++i)
1468 bc99d868 2021-03-19 op clients[i].fd = -1;
1470 bc99d868 2021-03-19 op event_set(&e4, sock4, EV_READ | EV_PERSIST, &do_accept, NULL);
1471 a6e689d7 2021-02-12 op event_add(&e4, NULL);
1473 abc007d2 2021-02-08 op if (sock6 != -1) {
1474 a6e689d7 2021-02-12 op has_ipv6 = 1;
1475 bc99d868 2021-03-19 op event_set(&e6, sock6, EV_READ | EV_PERSIST, &do_accept, NULL);
1476 a6e689d7 2021-02-12 op event_add(&e6, NULL);
1479 bc99d868 2021-03-19 op event_set(&imsgev, ibuf->fd, EV_READ | EV_PERSIST, handle_dispatch_imsg, ibuf);
1480 bc99d868 2021-03-19 op event_add(&imsgev, NULL);
1482 abc007d2 2021-02-08 op #ifdef SIGINFO
1483 a6e689d7 2021-02-12 op has_siginfo = 1;
1484 a6e689d7 2021-02-12 op signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1485 a6e689d7 2021-02-12 op signal_add(&siginfo, NULL);
1487 5e3285d5 2021-02-12 op signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1488 a6e689d7 2021-02-12 op signal_add(&sigusr2, NULL);
1490 62e001b0 2021-03-20 op sandbox_server_process();
1491 abc007d2 2021-02-08 op event_dispatch();
