2 * Copyright (c) 2021, 2022, 2023 Omar Polo <op@omarpolo.com>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
34 #define MIN(a, b) ((a) < (b) ? (a) : (b))
37 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
41 static struct event siginfo;
43 static struct event sigusr2;
45 int connected_clients;
48 * This function is not publicy exported because it is a hack until libtls
49 * has a proper privsep setup.
51 void tls_config_use_fake_private_key(struct tls_config *);
53 static inline int matches(const char*, const char*);
55 static void handle_handshake(int, short, void*);
56 static const char *strip_path(const char*, int);
57 static void fmtbuf(char *, size_t, const char *, struct client *,
59 static int apply_block_return(struct client*);
60 static int check_matching_certificate(X509_STORE *, struct client *);
61 static int apply_reverse_proxy(struct client *);
62 static int apply_fastcgi(struct client*);
63 static int apply_require_ca(struct client*);
64 static void open_dir(struct client*);
65 static void redirect_canonical_dir(struct client*);
67 static void client_tls_readcb(int, short, void *);
68 static void client_tls_writecb(int, short, void *);
70 static void client_read(struct bufferevent *, void *);
71 void client_write(struct bufferevent *, void *);
72 static void client_error(struct bufferevent *, short, void *);
74 static void client_close_ev(int, short, void *);
76 static void handle_siginfo(int, short, void*);
78 static int server_dispatch_parent(int, struct privsep_proc *, struct imsg *);
79 static int server_dispatch_crypto(int, struct privsep_proc *, struct imsg *);
80 static int server_dispatch_logger(int, struct privsep_proc *, struct imsg *);
82 static struct privsep_proc procs[] = {
83 { "parent", PROC_PARENT, server_dispatch_parent },
84 { "crypto", PROC_CRYPTO, server_dispatch_crypto },
85 { "logger", PROC_LOGGER, server_dispatch_logger },
88 static uint32_t server_client_id;
90 struct client_tree_id clients;
93 match_addr(struct address *target, struct address *source)
95 return (target->ai_flags == source->ai_flags &&
96 target->ai_family == source->ai_family &&
97 target->ai_socktype == source->ai_socktype &&
98 target->ai_protocol == source->ai_protocol &&
99 target->slen == source->slen &&
100 !memcmp(&target->ss, &source->ss, target->slen));
104 matches(const char *pattern, const char *path)
108 return !fnmatch(pattern, path, 0);
112 match_host(struct vhost *v, struct client *c)
115 struct address *addr;
117 TAILQ_FOREACH(addr, &v->addrs, addrs)
118 if (match_addr(addr, c->addr))
123 if (matches(v->domain, c->domain))
126 TAILQ_FOREACH(a, &v->aliases, aliases)
127 if (matches(a->alias, c->domain))
134 vhost_lang(struct vhost *v, const char *path)
136 struct location *loc;
138 if (v == NULL || path == NULL)
141 loc = TAILQ_FIRST(&v->locations);
142 while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
143 if (*loc->lang != '\0') {
144 if (matches(loc->match, path))
149 loc = TAILQ_FIRST(&v->locations);
150 if (*loc->lang == '\0')
156 vhost_default_mime(struct vhost *v, const char *path)
158 struct location *loc;
159 const char *default_mime = "application/octet-stream";
161 if (v == NULL || path == NULL)
164 loc = TAILQ_FIRST(&v->locations);
165 while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
166 if (*loc->default_mime != '\0') {
167 if (matches(loc->match, path))
168 return loc->default_mime;
172 loc = TAILQ_FIRST(&v->locations);
173 if (*loc->default_mime != '\0')
174 return loc->default_mime;
179 vhost_index(struct vhost *v, const char *path)
181 struct location *loc;
182 const char *index = "index.gmi";
184 if (v == NULL || path == NULL)
187 loc = TAILQ_FIRST(&v->locations);
188 while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
189 if (*loc->index != '\0') {
190 if (matches(loc->match, path))
195 loc = TAILQ_FIRST(&v->locations);
196 if (*loc->index != '\0')
202 vhost_auto_index(struct vhost *v, const char *path)
204 struct location *loc;
206 if (v == NULL || path == NULL)
209 loc = TAILQ_FIRST(&v->locations);
210 while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
211 if (loc->auto_index != 0) {
212 if (matches(loc->match, path))
213 return loc->auto_index == 1;
217 loc = TAILQ_FIRST(&v->locations);
218 return loc->auto_index == 1;
222 vhost_block_return(struct vhost *v, const char *path, int *code, const char **fmt)
224 struct location *loc;
226 if (v == NULL || path == NULL)
229 loc = TAILQ_FIRST(&v->locations);
230 while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
231 if (loc->block_code != 0) {
232 if (matches(loc->match, path)) {
233 *code = loc->block_code;
234 *fmt = loc->block_fmt;
240 loc = TAILQ_FIRST(&v->locations);
241 *code = loc->block_code;
242 *fmt = loc->block_fmt;
243 return loc->block_code != 0;
247 vhost_fastcgi(struct vhost *v, const char *path)
249 struct location *loc;
251 if (v == NULL || path == NULL)
254 loc = TAILQ_FIRST(&v->locations);
255 while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
257 if (matches(loc->match, path))
261 loc = TAILQ_FIRST(&v->locations);
266 vhost_dirfd(struct vhost *v, const char *path, size_t *retloc)
268 struct location *loc;
271 if (v == NULL || path == NULL)
274 loc = TAILQ_FIRST(&v->locations);
275 while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
277 if (loc->dirfd != -1)
278 if (matches(loc->match, path)) {
285 loc = TAILQ_FIRST(&v->locations);
290 vhost_strip(struct vhost *v, const char *path)
292 struct location *loc;
294 if (v == NULL || path == NULL)
297 loc = TAILQ_FIRST(&v->locations);
298 while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
299 if (loc->strip != 0) {
300 if (matches(loc->match, path))
305 loc = TAILQ_FIRST(&v->locations);
310 vhost_require_ca(struct vhost *v, const char *path)
312 struct location *loc;
314 if (v == NULL || path == NULL)
317 loc = TAILQ_FIRST(&v->locations);
318 while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
319 if (loc->reqca != NULL) {
320 if (matches(loc->match, path))
325 loc = TAILQ_FIRST(&v->locations);
330 vhost_disable_log(struct vhost *v, const char *path)
332 struct location *loc;
334 if (v == NULL || path == NULL)
337 loc = TAILQ_FIRST(&v->locations);
338 while ((loc = TAILQ_NEXT(loc, locations)) != NULL) {
339 if (loc->disable_log && matches(loc->match, path))
343 loc = TAILQ_FIRST(&v->locations);
344 return loc->disable_log;
348 mark_nonblock(int fd)
352 if ((flags = fcntl(fd, F_GETFL)) == -1)
353 fatal("fcntl(F_GETFL)");
354 if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
355 fatal("fcntl(F_SETFL)");
359 handle_handshake(int fd, short ev, void *d)
361 struct client *c = d;
362 struct conf *conf = c->conf;
364 const char *servname;
365 const char *parse_err = "unknown error";
367 switch (tls_handshake(c->ctx)) {
368 case 0: /* success */
371 log_warnx("tls_handshake failed: %s", tls_error(c->ctx));
374 case TLS_WANT_POLLIN:
375 event_once(c->fd, EV_READ, handle_handshake, c, NULL);
377 case TLS_WANT_POLLOUT:
378 event_once(c->fd, EV_WRITE, handle_handshake, c, NULL);
385 c->bev = bufferevent_new(fd, client_read, client_write,
388 fatal("%s: failed to allocate client buffer", __func__);
390 event_set(&c->bev->ev_read, c->fd, EV_READ,
391 client_tls_readcb, c->bev);
392 event_set(&c->bev->ev_write, c->fd, EV_WRITE,
393 client_tls_writecb, c->bev);
396 evbuffer_unfreeze(c->bev->input, 0);
397 evbuffer_unfreeze(c->bev->output, 1);
400 if ((servname = tls_conn_servername(c->ctx)) == NULL) {
401 log_debug("handshake: missing SNI");
405 if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
406 log_info("puny_decode: %s", parse_err);
410 TAILQ_FOREACH(h, &conf->hosts, vhosts)
411 if (match_host(h, c))
414 log_debug("handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
415 servname != NULL ? servname : "(null)",
417 h != NULL ? h->domain : "(null)");
421 bufferevent_enable(c->bev, EV_READ);
426 start_reply(c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
430 strip_path(const char *path, int strip)
435 if ((t = strchr(path, '/')) == NULL) {
436 path = strchr(path, '\0');
447 fmtbuf(char *buf, size_t buflen, const char *fmt, struct client *c,
454 memset(tmp, 0, sizeof(tmp));
455 for (i = 0; *fmt; ++fmt) {
456 if (i == sizeof(tmp)-1 || *fmt == '%') {
457 strlcat(buf, tmp, buflen);
458 memset(tmp, 0, sizeof(tmp));
469 strlcat(buf, "%", buflen);
473 strlcat(buf, "/", buflen);
474 strlcat(buf, path, buflen);
477 strlcat(buf, c->iri.query, buflen);
480 snprintf(tmp, sizeof(tmp), "%d", c->addr->port);
481 strlcat(buf, tmp, buflen);
482 memset(tmp, 0, sizeof(tmp));
485 strlcat(buf, c->domain, buflen);
488 log_warnx("%s: unknown fmt specifier %c",
494 strlcat(buf, tmp, buflen);
497 /* 1 if a matching `block return' (and apply it), 0 otherwise */
499 apply_block_return(struct client *c)
501 char buf[GEMINI_URL_LEN];
502 const char *fmt, *path;
505 if (!vhost_block_return(c->host, c->iri.path, &code, &fmt))
508 path = strip_path(c->iri.path, vhost_strip(c->host, c->iri.path));
509 fmtbuf(buf, sizeof(buf), fmt, c, path);
511 start_reply(c, code, buf);
515 static struct proxy *
516 matched_proxy(struct client *c)
523 TAILQ_FOREACH(p, &c->host->proxies, proxies) {
524 if (*(proto = p->match_proto) == '\0')
526 if (*(host = p->match_host) == '\0')
528 if (*(port = p->match_port) == '\0')
531 if (matches(proto, c->iri.schema) &&
532 matches(host, c->domain) &&
533 matches(port, c->iri.port))
541 check_matching_certificate(X509_STORE *store, struct client *c)
546 if (!tls_peer_cert_provided(c->ctx)) {
547 start_reply(c, CLIENT_CERT_REQ, "client certificate required");
551 cert = tls_peer_cert_chain_pem(c->ctx, &len);
552 if (!validate_against_ca(store, cert, len)) {
553 start_reply(c, CERT_NOT_AUTH, "certificate not authorised");
561 proxy_socket(struct client *c, const char *host, const char *port)
563 struct addrinfo hints, *res, *res0;
564 int r, sock, save_errno;
565 const char *cause = NULL;
567 memset(&hints, 0, sizeof(hints));
568 hints.ai_family = AF_UNSPEC;
569 hints.ai_socktype = SOCK_STREAM;
571 /* XXX: asr_run? :> */
572 r = getaddrinfo(host, port, &hints, &res0);
574 log_warnx("getaddrinfo(\"%s\", \"%s\"): %s",
575 host, port, gai_strerror(r));
579 for (res = res0; res; res = res->ai_next) {
580 sock = socket(res->ai_family, res->ai_socktype,
587 if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
600 log_warn("can't connect to %s:%s: %s", host, port, cause);
607 /* 1 if matching a proxy relay-to (and apply it), 0 otherwise */
609 apply_reverse_proxy(struct client *c)
613 if ((p = matched_proxy(c)) == NULL)
618 if (p->reqca != NULL && check_matching_certificate(p->reqca, c))
621 log_debug("opening proxy connection for %s:%s",
624 if ((c->pfd = proxy_socket(c, p->host, p->port)) == -1) {
625 start_reply(c, PROXY_ERROR, "proxy error");
629 mark_nonblock(c->pfd);
630 if (proxy_init(c) == -1)
631 start_reply(c, PROXY_ERROR, "proxy error");
637 fcgi_open_sock(struct fcgi *f)
639 struct sockaddr_un addr;
642 if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
647 memset(&addr, 0, sizeof(addr));
648 addr.sun_family = AF_UNIX;
649 strlcpy(addr.sun_path, f->path, sizeof(addr.sun_path));
651 if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
652 log_warn("failed to connect to %s", f->path);
661 fcgi_open_conn(struct fcgi *f)
663 struct addrinfo hints, *servinfo, *p;
664 int r, sock, save_errno;
665 const char *cause = NULL;
667 memset(&hints, 0, sizeof(hints));
668 hints.ai_family = AF_UNSPEC;
669 hints.ai_socktype = SOCK_STREAM;
670 hints.ai_flags = AI_ADDRCONFIG;
672 if ((r = getaddrinfo(f->path, f->port, &hints, &servinfo)) != 0) {
673 log_warnx("getaddrinfo %s:%s: %s", f->path, f->port,
678 for (p = servinfo; p != NULL; p = p->ai_next) {
679 sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
684 if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
695 log_warn("couldn't connect to %s:%s: %s", f->path, f->port,
700 freeaddrinfo(servinfo);
704 /* 1 if matching `fcgi' (and apply it), 0 otherwise */
706 apply_fastcgi(struct client *c)
711 if ((id = vhost_fastcgi(c->host, c->iri.path)) == -1)
714 TAILQ_FOREACH(f, &c->conf->fcgi, fcgi) {
721 log_warnx("can't find fcgi #%d", id);
725 log_debug("opening fastcgi connection for (%s,%s)",
728 if (*f->port == '\0')
729 c->pfd = fcgi_open_sock(f);
731 c->pfd = fcgi_open_conn(f);
734 start_reply(c, CGI_ERROR, "CGI error");
738 mark_nonblock(c->pfd);
740 c->cgibev = bufferevent_new(c->pfd, fcgi_read, fcgi_write,
742 if (c->cgibev == NULL) {
743 start_reply(c, TEMP_FAILURE, "internal server error");
747 bufferevent_enable(c->cgibev, EV_READ|EV_WRITE);
753 /* 1 if matching `require client ca' fails (and apply it), 0 otherwise */
755 apply_require_ca(struct client *c)
759 if ((store = vhost_require_ca(c->host, c->iri.path)) == NULL)
761 return check_matching_certificate(store, c);
765 server_dir_listing(struct client *c)
769 root = !strcmp(c->iri.path, "/") || *c->iri.path == '\0';
771 if (!vhost_auto_index(c->host, c->iri.path)) {
772 start_reply(c, NOT_FOUND, "not found");
776 c->dirlen = scandir_fd(c->pfd, &c->dir,
777 root ? select_non_dotdot : select_non_dot,
779 if (c->dirlen == -1) {
780 log_warn("scandir_fd(%d) (vhost:%s) %s",
781 c->pfd, c->host->domain, c->iri.path);
782 start_reply(c, TEMP_FAILURE, "internal server error");
786 c->type = REQUEST_DIR;
787 start_reply(c, SUCCESS, "text/gemini");
788 evbuffer_add_printf(EVBUFFER_OUTPUT(c->bev),
789 "# Index of /%s\n\n", c->iri.path);
793 open_dir(struct client *c)
800 if (*c->iri.path != '\0' && !ends_with(c->iri.path, "/")) {
801 redirect_canonical_dir(c);
805 index = vhost_index(c->host, c->iri.path);
806 fd = openat(c->pfd, index, O_RDONLY);
808 server_dir_listing(c);
812 if (fstat(fd, &sb) == -1) {
815 start_reply(c, TEMP_FAILURE, "internal server error");
819 if (!S_ISREG(sb.st_mode)) {
821 server_dir_listing(c);
825 strlcpy(path, c->iri.path, sizeof(path));
826 strlcat(path, index, sizeof(path));
830 c->type = REQUEST_FILE;
831 start_reply(c, SUCCESS, mime(c->conf, c->host, path));
835 redirect_canonical_dir(struct client *c)
837 char buf[GEMINI_URL_LEN];
840 r = snprintf(buf, sizeof(buf), "/%s/", c->iri.path);
841 if (r < 0 || (size_t)r >= sizeof(buf)) {
842 start_reply(c, TEMP_FAILURE, "internal server error");
846 start_reply(c, TEMP_REDIRECT, buf);
850 client_tls_readcb(int fd, short event, void *d)
852 struct bufferevent *bufev = d;
853 struct client *client = bufev->cbarg;
856 int what = EVBUFFER_READ;
857 int howmuch = IBUF_READ_SIZE;
858 char buf[IBUF_READ_SIZE];
860 if (event == EV_TIMEOUT) {
861 what |= EVBUFFER_TIMEOUT;
865 if (bufev->wm_read.high != 0)
866 howmuch = MIN(sizeof(buf), bufev->wm_read.high);
868 switch (ret = tls_read(client->ctx, buf, howmuch)) {
869 case TLS_WANT_POLLIN:
870 case TLS_WANT_POLLOUT:
873 what |= EVBUFFER_ERROR;
879 what |= EVBUFFER_EOF;
883 if (evbuffer_add(bufev->input, buf, len) == -1) {
884 what |= EVBUFFER_ERROR;
888 event_add(&bufev->ev_read, NULL);
889 if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
891 if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
893 * here we could implement a read pressure policy.
897 if (bufev->readcb != NULL)
898 (*bufev->readcb)(bufev, bufev->cbarg);
903 event_add(&bufev->ev_read, NULL);
907 (*bufev->errorcb)(bufev, what, bufev->cbarg);
911 client_tls_writecb(int fd, short event, void *d)
913 struct bufferevent *bufev = d;
914 struct client *client = bufev->cbarg;
917 short what = EVBUFFER_WRITE;
919 if (event == EV_TIMEOUT) {
920 what |= EVBUFFER_TIMEOUT;
924 if (EVBUFFER_LENGTH(bufev->output) != 0) {
925 ret = tls_write(client->ctx,
926 EVBUFFER_DATA(bufev->output),
927 EVBUFFER_LENGTH(bufev->output));
929 case TLS_WANT_POLLIN:
930 case TLS_WANT_POLLOUT:
933 what |= EVBUFFER_ERROR;
937 evbuffer_drain(bufev->output, len);
940 if (EVBUFFER_LENGTH(bufev->output) != 0)
941 event_add(&bufev->ev_write, NULL);
943 if (bufev->writecb != NULL &&
944 EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
945 (*bufev->writecb)(bufev, bufev->cbarg);
949 event_add(&bufev->ev_write, NULL);
952 log_warnx("tls error: %s", tls_error(client->ctx));
953 (*bufev->errorcb)(bufev, what, bufev->cbarg);
957 client_read(struct bufferevent *bev, void *d)
960 struct client *c = d;
961 struct evbuffer *src = EVBUFFER_INPUT(bev);
962 const char *path, *p, *parse_err = "invalid request";
963 char decoded[DOMAIN_NAME_LEN];
965 bufferevent_disable(bev, EVBUFFER_READ);
968 * libevent2 can still somehow call this function, even
969 * though I never enable EV_READ in the bufferevent. If
970 * that's the case, bail out.
972 if (c->type != REQUEST_UNDECIDED)
975 /* max url len + \r\n */
976 if (EVBUFFER_LENGTH(src) > 1024 + 2) {
977 log_debug("too much data received");
978 start_reply(c, BAD_REQUEST, "bad request");
982 c->req = evbuffer_readln(src, &c->reqlen, EVBUFFER_EOL_CRLF_STRICT);
983 if (c->req == NULL) {
984 /* not enough data yet. */
985 bufferevent_enable(bev, EVBUFFER_READ);
988 if (c->reqlen > 1024+2) {
989 log_debug("URL too long");
990 start_reply(c, BAD_REQUEST, "bad request");
994 if (!parse_iri(c->req, &c->iri, &parse_err) ||
995 !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
996 log_debug("IRI parse error: %s", parse_err);
997 start_reply(c, BAD_REQUEST, "bad request");
1001 if (apply_reverse_proxy(c))
1004 /* ignore the port number */
1005 if (strcmp(c->iri.schema, "gemini") ||
1006 strcmp(decoded, c->domain)) {
1007 start_reply(c, PROXY_REFUSED, "won't proxy request");
1011 if (apply_require_ca(c) ||
1012 apply_block_return(c)||
1017 p = strip_path(path, vhost_strip(c->host, path));
1023 c->pfd = openat(vhost_dirfd(c->host, path, &c->loc), p, O_RDONLY);
1025 if (errno == EACCES)
1026 log_info("can't open %s: %s", p, strerror(errno));
1027 start_reply(c, NOT_FOUND, "not found");
1031 if (fstat(c->pfd, &sb) == -1) {
1032 log_warnx("fstat %s", path);
1033 start_reply(c, TEMP_FAILURE, "internal server error");
1037 if (S_ISDIR(sb.st_mode)) {
1042 c->type = REQUEST_FILE;
1043 start_reply(c, SUCCESS, mime(c->conf, c->host, p));
1047 client_write(struct bufferevent *bev, void *d)
1049 struct client *c = d;
1050 struct evbuffer *out = EVBUFFER_OUTPUT(bev);
1056 case REQUEST_UNDECIDED:
1058 * Ignore spurious calls when we still don't have idea
1059 * what to do with the request.
1064 if ((r = read(c->pfd, buf, sizeof(buf))) == -1) {
1066 client_error(bev, EVBUFFER_ERROR, c);
1068 } else if (r == 0) {
1071 } else if (r != sizeof(buf))
1072 c->type = REQUEST_DONE;
1073 bufferevent_write(bev, buf, r);
1077 /* TODO: handle big big directories better */
1078 for (c->diroff = 0; c->diroff < c->dirlen; ++c->diroff) {
1079 const char *sufx = "";
1081 encode_path(nam, sizeof(nam),
1082 c->dir[c->diroff]->d_name);
1083 if (c->dir[c->diroff]->d_type == DT_DIR)
1085 evbuffer_add_printf(out, "=> ./%s%s\n", nam, sufx);
1086 free(c->dir[c->diroff]);
1091 c->type = REQUEST_DONE;
1093 event_add(&c->bev->ev_write, NULL);
1099 * Here we depend on fastcgi or proxy connection to
1105 if (EVBUFFER_LENGTH(out) == 0)
1112 client_error(struct bufferevent *bev, short error, void *d)
1114 struct client *c = d;
1116 c->type = REQUEST_DONE;
1118 if (error & EVBUFFER_TIMEOUT) {
1119 log_debug("timeout; forcefully closing the connection");
1121 start_reply(c, BAD_REQUEST, "timeout");
1127 if (error & EVBUFFER_EOF) {
1132 log_warnx("unknown bufferevent error 0x%x", error);
1137 start_reply(struct client *c, int code, const char *meta)
1139 struct evbuffer *evb = EVBUFFER_OUTPUT(c->bev);
1143 bufferevent_enable(c->bev, EVBUFFER_WRITE);
1148 r = evbuffer_add_printf(evb, "%d %s", code, meta);
1152 /* 2 digit status + space + 1024 max reply */
1156 if (c->type != REQUEST_FCGI &&
1157 c->type != REQUEST_PROXY &&
1158 !strcmp(meta, "text/gemini") &&
1159 (lang = vhost_lang(c->host, c->iri.path)) != NULL) {
1160 rr = evbuffer_add_printf(evb, ";lang=%s", lang);
1167 bufferevent_write(c->bev, "\r\n", 2);
1169 if (!vhost_disable_log(c->host, c->iri.path))
1170 log_request(c, code, meta);
1173 c->type = REQUEST_DONE;
1178 log_warnx("evbuffer_add_printf error: no memory");
1179 evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1184 log_warnx("reply header overflow");
1185 evbuffer_drain(evb, EVBUFFER_LENGTH(evb));
1186 start_reply(c, TEMP_FAILURE, "internal error");
1190 client_close_ev(int fd, short event, void *d)
1192 struct client *c = d;
1194 switch (tls_close(c->ctx)) {
1195 case TLS_WANT_POLLIN:
1196 event_once(c->fd, EV_READ, client_close_ev, c, NULL);
1198 case TLS_WANT_POLLOUT:
1199 event_once(c->fd, EV_WRITE, client_close_ev, c, NULL);
1203 connected_clients--;
1225 client_proxy_close(int fd, short event, void *d)
1227 struct tls *ctx = d;
1234 switch (tls_close(ctx)) {
1235 case TLS_WANT_POLLIN:
1236 event_once(fd, EV_READ, client_proxy_close, d, NULL);
1238 case TLS_WANT_POLLOUT:
1239 event_once(fd, EV_WRITE, client_proxy_close, d, NULL);
1248 client_close(struct client *c)
1251 * We may end up calling client_close in various situations
1252 * and for the most unexpected reasons. Therefore, we need to
1253 * ensure that everything gets properly released once we reach
1257 SPLAY_REMOVE(client_tree_id, &clients, c);
1259 if (c->cgibev != NULL) {
1260 bufferevent_disable(c->cgibev, EVBUFFER_READ|EVBUFFER_WRITE);
1261 bufferevent_free(c->cgibev);
1267 if (c->bev != NULL) {
1268 bufferevent_disable(c->bev, EVBUFFER_READ|EVBUFFER_WRITE);
1269 bufferevent_free(c->bev);
1272 if (c->proxyevset &&
1273 event_pending(&c->proxyev, EV_READ|EV_WRITE, NULL)) {
1275 event_del(&c->proxyev);
1278 if (c->pfd != -1 && c->proxyctx != NULL) {
1279 /* shut down the proxy TLS connection */
1280 client_proxy_close(c->pfd, 0, c->proxyctx);
1284 if (c->proxybev != NULL)
1285 bufferevent_free(c->proxybev);
1287 client_close_ev(c->fd, 0, c);
1291 server_accept(int sock, short et, void *d)
1293 struct address *addr = d;
1295 struct sockaddr_storage raddr;
1296 struct sockaddr *sraddr;
1300 sraddr = (struct sockaddr *)&raddr;
1301 len = sizeof(raddr);
1302 if ((fd = accept(sock, sraddr, &len)) == -1) {
1303 if (errno == EWOULDBLOCK || errno == EAGAIN ||
1304 errno == ECONNABORTED)
1311 c = xcalloc(1, sizeof(*c));
1312 c->conf = addr->conf;
1314 c->id = ++server_client_id;
1317 memcpy(&c->raddr, &raddr, sizeof(raddr));
1320 e = getnameinfo(sraddr, len, c->rhost, sizeof(c->rhost),
1321 c->rserv, sizeof(c->rserv), NI_NUMERICHOST | NI_NUMERICSERV);
1323 log_warnx("getnameinfo failed: %s", gai_strerror(e));
1329 if (tls_accept_socket(addr->ctx, &c->ctx, fd) == -1) {
1330 log_warnx("failed to accept socket: %s", tls_error(c->ctx));
1336 SPLAY_INSERT(client_tree_id, &clients, c);
1337 event_once(c->fd, EV_READ|EV_WRITE, handle_handshake, c, NULL);
1338 connected_clients++;
1342 client_by_id(int id)
1347 return SPLAY_FIND(client_tree_id, &clients, &find);
1351 handle_siginfo(int fd, short ev, void *d)
1353 log_info("%d connected clients", connected_clients);
1357 add_matching_kps(struct tls_config *tlsconf, struct address *addr,
1360 struct address *vaddr;
1364 TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1365 TAILQ_FOREACH(vaddr, &h->addrs, addrs) {
1366 if (!match_addr(addr, vaddr))
1371 r = tls_config_set_keypair_ocsp_mem(tlsconf,
1372 h->cert, h->certlen, h->key, h->keylen,
1373 h->ocsp, h->ocsplen);
1375 r = tls_config_add_keypair_ocsp_mem(tlsconf,
1376 h->cert, h->certlen, h->key, h->keylen,
1377 h->ocsp, h->ocsplen);
1381 fatalx("failed to load keypair"
1382 " for host %s: %s", h->domain,
1383 tls_config_error(tlsconf));
1389 setup_tls(struct conf *conf)
1391 struct tls_config *tlsconf;
1392 struct address *addr;
1394 TAILQ_FOREACH(addr, &conf->addrs, addrs) {
1395 if ((tlsconf = tls_config_new()) == NULL)
1396 fatal("tls_config_new");
1398 if (conf->use_privsep_crypto)
1399 tls_config_use_fake_private_key(tlsconf);
1401 /* optionally accept client certs but don't verify */
1402 tls_config_verify_client_optional(tlsconf);
1403 tls_config_insecure_noverifycert(tlsconf);
1405 if (tls_config_set_protocols(tlsconf, conf->protos) == -1)
1406 fatalx("tls_config_set_protocols: %s",
1407 tls_config_error(tlsconf));
1409 add_matching_kps(tlsconf, addr, conf);
1411 tls_reset(addr->ctx);
1412 if (tls_configure(addr->ctx, tlsconf) == -1)
1413 fatalx("tls_configure: %s", tls_error(addr->ctx));
1415 tls_config_free(tlsconf);
1420 load_vhosts(struct conf *conf)
1425 TAILQ_FOREACH(h, &conf->hosts, vhosts) {
1426 TAILQ_FOREACH(l, &h->locations, locations) {
1427 if (*l->dir == '\0')
1429 l->dirfd = open(l->dir, O_RDONLY | O_DIRECTORY);
1431 fatal("open %s for domain %s", l->dir,
1438 server(struct privsep *ps, struct privsep_proc *p)
1440 proc_run(ps, p, procs, nitems(procs), server_init, NULL);
1444 server_init(struct privsep *ps, struct privsep_proc *p, void *arg)
1448 SPLAY_INIT(&clients);
1451 signal_set(&siginfo, SIGINFO, &handle_siginfo, NULL);
1452 signal_add(&siginfo, NULL);
1454 signal_set(&sigusr2, SIGUSR2, &handle_siginfo, NULL);
1455 signal_add(&sigusr2, NULL);
1457 sandbox_server_process();
1460 * ge doesn't use the privsep crypto engine; it doesn't use
1461 * privsep at all so `ps' is NULL.
1465 if (c->use_privsep_crypto)
1466 crypto_engine_init(ps->ps_env);
1471 server_configure_done(struct conf *conf)
1473 struct address *addr;
1475 if (load_default_mime(&conf->mime) == -1)
1476 fatal("can't load default mime");
1477 sort_mime(&conf->mime);
1481 TAILQ_FOREACH(addr, &conf->addrs, addrs) {
1482 if (addr->sock != -1)
1483 event_add(&addr->evsock, NULL);
1490 server_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
1492 struct privsep *ps = p->p_ps;
1493 struct conf *conf = ps->ps_env;
1495 switch (imsg->hdr.type) {
1496 case IMSG_RECONF_START:
1497 case IMSG_RECONF_MIME:
1498 case IMSG_RECONF_PROTOS:
1499 case IMSG_RECONF_SOCK:
1500 case IMSG_RECONF_FCGI:
1501 case IMSG_RECONF_HOST:
1502 case IMSG_RECONF_CERT:
1503 case IMSG_RECONF_KEY:
1504 case IMSG_RECONF_OCSP:
1505 case IMSG_RECONF_HOST_ADDR:
1506 case IMSG_RECONF_LOC:
1507 case IMSG_RECONF_ENV:
1508 case IMSG_RECONF_ALIAS:
1509 case IMSG_RECONF_PROXY:
1510 case IMSG_RECONF_PROXY_CERT:
1511 case IMSG_RECONF_PROXY_KEY:
1512 return config_recv(conf, imsg);
1513 case IMSG_RECONF_END:
1514 if (config_recv(conf, imsg) == -1)
1516 if (server_configure_done(conf) == -1)
1527 server_dispatch_crypto(int fd, struct privsep_proc *p, struct imsg *imsg)
1533 server_dispatch_logger(int fd, struct privsep_proc *p, struct imsg *imsg)
1539 client_tree_cmp(struct client *a, struct client *b)
1543 else if (a->id < b->id)
1549 SPLAY_GENERATE(client_tree_id, client, entry, client_tree_cmp)