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 d3a08f4d 2021-01-17 op #include <sys/mman.h>
18 d3a08f4d 2021-01-17 op #include <sys/stat.h>
20 d3a08f4d 2021-01-17 op #include <netdb.h>
22 d3a08f4d 2021-01-17 op #include <assert.h>
23 d3a08f4d 2021-01-17 op #include <errno.h>
24 d3a08f4d 2021-01-17 op #include <fcntl.h>
25 b4d409cf 2021-01-21 op #include <fnmatch.h>
26 d3a08f4d 2021-01-17 op #include <string.h>
28 d3a08f4d 2021-01-17 op #include "gmid.h"
30 d3a08f4d 2021-01-17 op int connected_clients;
33 c8b74339 2021-01-24 op vhost_lang(struct vhost *v, const char *path)
35 c8b74339 2021-01-24 op struct location *loc;
36 c8b74339 2021-01-24 op const char *lang = NULL;
38 caad0308 2021-01-27 op if (v == NULL || path == NULL)
41 c8b74339 2021-01-24 op for (loc = v->locations; loc->match != NULL; ++loc) {
42 c8b74339 2021-01-24 op if (!fnmatch(loc->match, path, 0)) {
43 c8b74339 2021-01-24 op if (loc->lang != NULL)
44 c8b74339 2021-01-24 op lang = loc->lang;
52 c8b74339 2021-01-24 op vhost_default_mime(struct vhost *v, const char *path)
54 c8b74339 2021-01-24 op struct location *loc;
55 c8b74339 2021-01-24 op const char *default_mime = "application/octet-stream";
57 caad0308 2021-01-27 op if (v == NULL || path == NULL)
58 caad0308 2021-01-27 op return default_mime;
60 c8b74339 2021-01-24 op for (loc = v->locations; loc->match != NULL; ++loc) {
61 c8b74339 2021-01-24 op if (!fnmatch(loc->match, path, 0)) {
62 c8b74339 2021-01-24 op if (loc->default_mime != NULL)
63 c8b74339 2021-01-24 op default_mime = loc->default_mime;
67 c8b74339 2021-01-24 op return default_mime;
71 c8b74339 2021-01-24 op vhost_index(struct vhost *v, const char *path)
73 c8b74339 2021-01-24 op struct location *loc;
74 c8b74339 2021-01-24 op const char *index = "index.gmi";
76 caad0308 2021-01-27 op if (v == NULL || path == NULL)
79 c8b74339 2021-01-24 op for (loc = v->locations; loc->match != NULL; ++loc) {
80 c8b74339 2021-01-24 op if (!fnmatch(loc->match, path, 0)) {
81 c8b74339 2021-01-24 op if (loc->index != NULL)
82 c8b74339 2021-01-24 op index = loc->index;
90 252908e6 2021-01-24 op vhost_auto_index(struct vhost *v, const char *path)
92 252908e6 2021-01-24 op struct location *loc;
93 252908e6 2021-01-24 op int auto_index = 0;
95 252908e6 2021-01-24 op for (loc = v->locations; loc->match != NULL; ++loc) {
96 252908e6 2021-01-24 op if (!fnmatch(loc->match, path, 0)) {
97 252908e6 2021-01-24 op if (loc->auto_index)
98 252908e6 2021-01-24 op auto_index = loc->auto_index;
102 252908e6 2021-01-24 op return auto_index == 1;
106 d3a08f4d 2021-01-17 op check_path(struct client *c, const char *path, int *fd)
108 d3a08f4d 2021-01-17 op struct stat sb;
109 d1ca3911 2021-01-21 op const char *p;
112 d3a08f4d 2021-01-17 op assert(path != NULL);
114 d1ca3911 2021-01-21 op if (*path == '\0')
116 d1ca3911 2021-01-21 op else if (*path == '/')
117 d1ca3911 2021-01-21 op /* in send_dir we add an initial / (to be
118 d1ca3911 2021-01-21 op * redirect-friendly), but here we want to skip it */
123 252908e6 2021-01-24 op flags = O_RDONLY | O_NOFOLLOW;
125 252908e6 2021-01-24 op if (*fd == -1 && (*fd = openat(c->host->dirfd, p, flags)) == -1)
126 d3a08f4d 2021-01-17 op return FILE_MISSING;
128 d3a08f4d 2021-01-17 op if (fstat(*fd, &sb) == -1) {
129 d3a08f4d 2021-01-17 op LOGN(c, "failed stat for %s: %s", path, strerror(errno));
130 d3a08f4d 2021-01-17 op return FILE_MISSING;
133 d3a08f4d 2021-01-17 op if (S_ISDIR(sb.st_mode))
134 d3a08f4d 2021-01-17 op return FILE_DIRECTORY;
136 d3a08f4d 2021-01-17 op if (sb.st_mode & S_IXUSR)
137 d3a08f4d 2021-01-17 op return FILE_EXECUTABLE;
139 d3a08f4d 2021-01-17 op return FILE_EXISTS;
143 0be51733 2021-01-20 op open_file(struct pollfd *fds, struct client *c)
145 0be51733 2021-01-20 op switch (check_path(c, c->iri.path, &c->fd)) {
146 d3a08f4d 2021-01-17 op case FILE_EXECUTABLE:
147 252908e6 2021-01-24 op if (starts_with(c->iri.path, c->host->cgi)) {
148 07b0a142 2021-01-24 op start_cgi(c->iri.path, "", c->iri.query, fds, c);
152 d3a08f4d 2021-01-17 op /* fallthrough */
154 d3a08f4d 2021-01-17 op case FILE_EXISTS:
155 252908e6 2021-01-24 op load_file(fds, c);
158 d3a08f4d 2021-01-17 op case FILE_DIRECTORY:
159 252908e6 2021-01-24 op open_dir(fds, c);
162 d3a08f4d 2021-01-17 op case FILE_MISSING:
163 07b0a142 2021-01-24 op if (c->host->cgi != NULL && starts_with(c->iri.path, c->host->cgi)) {
164 07b0a142 2021-01-24 op check_for_cgi(c->iri.path, c->iri.query, fds, c);
167 a87f6625 2021-01-24 op start_reply(fds, c, NOT_FOUND, "not found");
171 d3a08f4d 2021-01-17 op /* unreachable */
177 252908e6 2021-01-24 op load_file(struct pollfd *fds, struct client *c)
179 252908e6 2021-01-24 op if ((c->len = filesize(c->fd)) == -1) {
180 252908e6 2021-01-24 op LOGE(c, "failed to get file size for %s", c->iri.path);
181 252908e6 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
185 252908e6 2021-01-24 op if ((c->buf = mmap(NULL, c->len, PROT_READ, MAP_PRIVATE,
186 252908e6 2021-01-24 op c->fd, 0)) == MAP_FAILED) {
187 252908e6 2021-01-24 op LOGW(c, "mmap: %s: %s", c->iri.path, strerror(errno));
188 252908e6 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
191 252908e6 2021-01-24 op c->i = c->buf;
192 252908e6 2021-01-24 op c->next = S_SENDING_FILE;
193 252908e6 2021-01-24 op start_reply(fds, c, SUCCESS, mime(c->host, c->iri.path));
197 d3a08f4d 2021-01-17 op * the inverse of this algorithm, i.e. starting from the start of the
198 d3a08f4d 2021-01-17 op * path + strlen(cgi), and checking if each component, should be
199 d3a08f4d 2021-01-17 op * faster. But it's tedious to write. This does the opposite: starts
200 d3a08f4d 2021-01-17 op * from the end and strip one component at a time, until either an
201 d3a08f4d 2021-01-17 op * executable is found or we emptied the path.
204 d3a08f4d 2021-01-17 op check_for_cgi(char *path, char *query, struct pollfd *fds, struct client *c)
207 d3a08f4d 2021-01-17 op end = strchr(path, '\0');
209 d3a08f4d 2021-01-17 op /* NB: assume CGI is enabled and path matches cgi */
211 d3a08f4d 2021-01-17 op while (end > path) {
212 d3a08f4d 2021-01-17 op /* go up one level. UNIX paths are simple and POSIX
213 d3a08f4d 2021-01-17 op * dirname, with its ambiguities on if the given path
214 d3a08f4d 2021-01-17 op * is changed or not, gives me headaches. */
215 d3a08f4d 2021-01-17 op while (*end != '/')
219 d3a08f4d 2021-01-17 op switch (check_path(c, path, &c->fd)) {
220 d3a08f4d 2021-01-17 op case FILE_EXECUTABLE:
221 07b0a142 2021-01-24 op start_cgi(path, end+1, query, fds,c);
223 d3a08f4d 2021-01-17 op case FILE_MISSING:
234 a87f6625 2021-01-24 op start_reply(fds, c, NOT_FOUND, "not found");
239 d3a08f4d 2021-01-17 op mark_nonblock(int fd)
243 d3a08f4d 2021-01-17 op if ((flags = fcntl(fd, F_GETFL)) == -1)
244 d3a08f4d 2021-01-17 op fatal("fcntl(F_GETFL): %s", strerror(errno));
245 d3a08f4d 2021-01-17 op if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
246 d3a08f4d 2021-01-17 op fatal("fcntl(F_SETFL): %s", strerror(errno));
250 d3a08f4d 2021-01-17 op handle_handshake(struct pollfd *fds, struct client *c)
252 d3a08f4d 2021-01-17 op struct vhost *h;
253 d3a08f4d 2021-01-17 op const char *servname;
255 d3a08f4d 2021-01-17 op switch (tls_handshake(c->ctx)) {
256 d3a08f4d 2021-01-17 op case 0: /* success */
257 d3a08f4d 2021-01-17 op case -1: /* already handshaked */
259 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
260 d3a08f4d 2021-01-17 op fds->events = POLLIN;
262 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
263 d3a08f4d 2021-01-17 op fds->events = POLLOUT;
266 d3a08f4d 2021-01-17 op /* unreachable */
270 d3a08f4d 2021-01-17 op servname = tls_conn_servername(c->ctx);
271 3300cbe0 2021-01-27 op puny_decode(servname, c->domain, sizeof(c->domain));
273 d3a08f4d 2021-01-17 op for (h = hosts; h->domain != NULL; ++h) {
274 3300cbe0 2021-01-27 op if (!fnmatch(h->domain, c->domain, 0))
278 22c6d633 2021-01-27 op LOGD(c, "handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"",
279 22c6d633 2021-01-27 op servname != NULL ? servname : "(null)",
281 22c6d633 2021-01-27 op h->domain != NULL ? h->domain : "(null)");
283 d3a08f4d 2021-01-17 op if (h->domain != NULL) {
284 d3a08f4d 2021-01-17 op c->state = S_OPEN;
286 d3a08f4d 2021-01-17 op handle_open_conn(fds, c);
290 0ab65593 2021-01-21 op if (servname != NULL)
291 0ab65593 2021-01-21 op strncpy(c->req, servname, sizeof(c->req));
293 0ab65593 2021-01-21 op strncpy(c->req, "null", sizeof(c->req));
295 a87f6625 2021-01-24 op start_reply(fds, c, BAD_REQUEST, "Wrong host or missing SNI");
299 d3a08f4d 2021-01-17 op handle_open_conn(struct pollfd *fds, struct client *c)
301 d3a08f4d 2021-01-17 op const char *parse_err = "invalid request";
302 3300cbe0 2021-01-27 op char decoded[DOMAIN_NAME_LEN];
304 0be51733 2021-01-20 op bzero(c->req, sizeof(c->req));
305 0be51733 2021-01-20 op bzero(&c->iri, sizeof(c->iri));
307 0be51733 2021-01-20 op switch (tls_read(c->ctx, c->req, sizeof(c->req)-1)) {
309 d3a08f4d 2021-01-17 op LOGE(c, "tls_read: %s", tls_error(c->ctx));
310 36162ed8 2021-01-22 op close_conn(fds, c);
313 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
314 d3a08f4d 2021-01-17 op fds->events = POLLIN;
317 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
318 d3a08f4d 2021-01-17 op fds->events = POLLOUT;
322 c4f682f8 2021-01-27 op if (!trim_req_iri(c->req, &parse_err)
323 c4f682f8 2021-01-27 op || !parse_iri(c->req, &c->iri, &parse_err)) {
324 c4f682f8 2021-01-27 op LOGI(c, "iri parse error: %s", parse_err);
325 c4f682f8 2021-01-27 op start_reply(fds, c, BAD_REQUEST, "invalid request");
329 3300cbe0 2021-01-27 op puny_decode(c->iri.host, decoded, sizeof(decoded));
331 3300cbe0 2021-01-27 op if (c->iri.port_no != conf.port
332 3300cbe0 2021-01-27 op || strcmp(c->iri.schema, "gemini")
333 3300cbe0 2021-01-27 op || strcmp(decoded, c->domain)) {
334 a87f6625 2021-01-24 op start_reply(fds, c, PROXY_REFUSED, "won't proxy request");
338 0be51733 2021-01-20 op open_file(fds, c);
342 df79b4c1 2021-01-19 op start_reply(struct pollfd *pfd, struct client *c, int code, const char *meta)
344 05c23a54 2021-01-19 op char buf[1030]; /* status + ' ' + max reply len + \r\n\0 */
345 c8b74339 2021-01-24 op const char *lang;
348 df79b4c1 2021-01-19 op c->code = code;
349 df79b4c1 2021-01-19 op c->meta = meta;
350 df79b4c1 2021-01-19 op c->state = S_INITIALIZING;
352 c8b74339 2021-01-24 op lang = vhost_lang(c->host, c->iri.path);
354 05c23a54 2021-01-19 op snprintf(buf, sizeof(buf), "%d ", code);
355 df79b4c1 2021-01-19 op strlcat(buf, meta, sizeof(buf));
356 c8b74339 2021-01-24 op if (!strcmp(meta, "text/gemini") && lang != NULL) {
357 05c23a54 2021-01-19 op strlcat(buf, "; lang=", sizeof(buf));
358 c8b74339 2021-01-24 op strlcat(buf, lang, sizeof(buf));
361 05c23a54 2021-01-19 op len = strlcat(buf, "\r\n", sizeof(buf));
362 0be51733 2021-01-20 op assert(len < sizeof(buf));
364 df79b4c1 2021-01-19 op switch (tls_write(c->ctx, buf, len)) {
366 a87f6625 2021-01-24 op close_conn(pfd, c);
368 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
369 d3a08f4d 2021-01-17 op pfd->events = POLLIN;
371 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
372 d3a08f4d 2021-01-17 op pfd->events = POLLOUT;
376 a87f6625 2021-01-24 op log_request(c, buf, sizeof(buf));
378 a87f6625 2021-01-24 op /* we don't need a body */
379 a87f6625 2021-01-24 op if (c->code != SUCCESS) {
380 a87f6625 2021-01-24 op close_conn(pfd, c);
384 a87f6625 2021-01-24 op /* advance the state machine */
385 a87f6625 2021-01-24 op c->state = c->next;
386 a87f6625 2021-01-24 op handle(pfd, c);
390 d3a08f4d 2021-01-17 op start_cgi(const char *spath, const char *relpath, const char *query,
391 d3a08f4d 2021-01-17 op struct pollfd *fds, struct client *c)
393 d3a08f4d 2021-01-17 op char addr[NI_MAXHOST];
394 d3a08f4d 2021-01-17 op const char *ruser, *cissuer, *chash;
397 d3a08f4d 2021-01-17 op e = getnameinfo((struct sockaddr*)&c->addr, sizeof(c->addr),
398 d3a08f4d 2021-01-17 op addr, sizeof(addr),
400 d3a08f4d 2021-01-17 op NI_NUMERICHOST);
404 d3a08f4d 2021-01-17 op if (tls_peer_cert_provided(c->ctx)) {
405 d3a08f4d 2021-01-17 op ruser = tls_peer_cert_subject(c->ctx);
406 d3a08f4d 2021-01-17 op cissuer = tls_peer_cert_issuer(c->ctx);
407 d3a08f4d 2021-01-17 op chash = tls_peer_cert_hash(c->ctx);
409 d3a08f4d 2021-01-17 op ruser = NULL;
410 d3a08f4d 2021-01-17 op cissuer = NULL;
411 d3a08f4d 2021-01-17 op chash = NULL;
414 d3a08f4d 2021-01-17 op if (!send_string(exfd, spath)
415 d3a08f4d 2021-01-17 op || !send_string(exfd, relpath)
416 d3a08f4d 2021-01-17 op || !send_string(exfd, query)
417 d3a08f4d 2021-01-17 op || !send_string(exfd, addr)
418 d3a08f4d 2021-01-17 op || !send_string(exfd, ruser)
419 d3a08f4d 2021-01-17 op || !send_string(exfd, cissuer)
420 d3a08f4d 2021-01-17 op || !send_string(exfd, chash)
421 d3a08f4d 2021-01-17 op || !send_vhost(exfd, c->host))
424 d3a08f4d 2021-01-17 op close(c->fd);
425 d3a08f4d 2021-01-17 op if ((c->fd = recv_fd(exfd)) == -1) {
426 a87f6625 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
429 a87f6625 2021-01-24 op c->state = S_SENDING_CGI;
430 d3a08f4d 2021-01-17 op cgi_poll_on_child(fds, c);
431 0be51733 2021-01-20 op c->code = -1;
432 d3a08f4d 2021-01-17 op /* handle_cgi(fds, c); */
436 d3a08f4d 2021-01-17 op /* fatal("cannot talk to the executor process: %s", strerror(errno)); */
437 132cae8c 2021-01-18 op fatal("cannot talk to the executor process");
441 0be51733 2021-01-20 op send_file(struct pollfd *fds, struct client *c)
443 d3a08f4d 2021-01-17 op ssize_t ret, len;
445 06f233ad 2021-01-21 op /* ensure the correct state */
446 a87f6625 2021-01-24 op c->state = S_SENDING_FILE;
448 d3a08f4d 2021-01-17 op len = (c->buf + c->len) - c->i;
450 d3a08f4d 2021-01-17 op while (len > 0) {
451 d3a08f4d 2021-01-17 op switch (ret = tls_write(c->ctx, c->i, len)) {
453 d3a08f4d 2021-01-17 op LOGE(c, "tls_write: %s", tls_error(c->ctx));
454 36162ed8 2021-01-22 op close_conn(fds, c);
457 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
458 d3a08f4d 2021-01-17 op fds->events = POLLIN;
461 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
462 d3a08f4d 2021-01-17 op fds->events = POLLOUT;
472 36162ed8 2021-01-22 op close_conn(fds, c);
476 252908e6 2021-01-24 op open_dir(struct pollfd *fds, struct client *c)
480 252908e6 2021-01-24 op char *before_file;
482 0be51733 2021-01-20 op len = strlen(c->iri.path);
483 252908e6 2021-01-24 op if (len > 0 && !ends_with(c->iri.path, "/")) {
484 252908e6 2021-01-24 op redirect_canonical_dir(fds, c);
488 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
489 d1ca3911 2021-01-21 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
490 d1ca3911 2021-01-21 op if (!ends_with(c->sbuf, "/"))
491 0be51733 2021-01-20 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
492 252908e6 2021-01-24 op before_file = strchr(c->sbuf, '\0');
493 c8b74339 2021-01-24 op len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
494 c8b74339 2021-01-24 op sizeof(c->sbuf));
495 252908e6 2021-01-24 op if (len >= sizeof(c->sbuf)) {
496 252908e6 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
500 252908e6 2021-01-24 op c->iri.path = c->sbuf;
502 252908e6 2021-01-24 op /* close later unless we have to generate the dir listing */
503 252908e6 2021-01-24 op dirfd = c->fd;
506 252908e6 2021-01-24 op switch (check_path(c, c->iri.path, &c->fd)) {
507 252908e6 2021-01-24 op case FILE_EXECUTABLE:
508 252908e6 2021-01-24 op if (starts_with(c->iri.path, c->host->cgi)) {
509 252908e6 2021-01-24 op start_cgi(c->iri.path, "", c->iri.query, fds, c);
513 252908e6 2021-01-24 op /* fallthrough */
515 252908e6 2021-01-24 op case FILE_EXISTS:
516 252908e6 2021-01-24 op load_file(fds, c);
519 252908e6 2021-01-24 op case FILE_DIRECTORY:
520 252908e6 2021-01-24 op start_reply(fds, c, TEMP_REDIRECT, c->sbuf);
523 252908e6 2021-01-24 op case FILE_MISSING:
524 252908e6 2021-01-24 op *before_file = '\0';
526 252908e6 2021-01-24 op if (!vhost_auto_index(c->host, c->iri.path)) {
527 252908e6 2021-01-24 op start_reply(fds, c, NOT_FOUND, "not found");
531 252908e6 2021-01-24 op c->fd = dirfd;
532 252908e6 2021-01-24 op c->next = S_SENDING_DIR;
534 252908e6 2021-01-24 op if ((c->dir = fdopendir(c->fd)) == NULL) {
535 252908e6 2021-01-24 op LOGE(c, "can't fdopendir(%d) (vhost:%s) %s: %s",
536 252908e6 2021-01-24 op c->fd, c->host->domain, c->iri.path, strerror(errno));
537 252908e6 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
542 252908e6 2021-01-24 op start_reply(fds, c, SUCCESS, "text/gemini");
546 252908e6 2021-01-24 op /* unreachable */
550 252908e6 2021-01-24 op close(dirfd);
554 252908e6 2021-01-24 op redirect_canonical_dir(struct pollfd *fds, struct client *c)
558 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
559 252908e6 2021-01-24 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
560 252908e6 2021-01-24 op len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
562 0be51733 2021-01-20 op if (len >= sizeof(c->sbuf)) {
563 a87f6625 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
567 252908e6 2021-01-24 op start_reply(fds, c, TEMP_REDIRECT, c->sbuf);
571 252908e6 2021-01-24 op read_next_dir_entry(struct client *c)
573 252908e6 2021-01-24 op struct dirent *d;
577 252908e6 2021-01-24 op if ((d = readdir(c->dir)) == NULL) {
578 252908e6 2021-01-24 op if (errno != 0)
579 252908e6 2021-01-24 op LOGE(c, "readdir: %s", strerror(errno));
582 252908e6 2021-01-24 op } while (!strcmp(d->d_name, "."));
584 252908e6 2021-01-24 op /* XXX: url escape */
585 252908e6 2021-01-24 op snprintf(c->sbuf, sizeof(c->sbuf), "=> %s %s\n",
586 252908e6 2021-01-24 op d->d_name, d->d_name);
587 252908e6 2021-01-24 op c->len = strlen(c->sbuf);
594 252908e6 2021-01-24 op send_directory_listing(struct pollfd *fds, struct client *c)
599 252908e6 2021-01-24 op if (c->len == 0) {
600 252908e6 2021-01-24 op if (!read_next_dir_entry(c))
604 252908e6 2021-01-24 op while (c->len > 0) {
605 252908e6 2021-01-24 op switch (r = tls_write(c->ctx, c->sbuf + c->off, c->len)) {
609 252908e6 2021-01-24 op case TLS_WANT_POLLOUT:
610 252908e6 2021-01-24 op fds->events = POLLOUT;
613 252908e6 2021-01-24 op case TLS_WANT_POLLIN:
614 252908e6 2021-01-24 op fds->events = POLLIN;
626 252908e6 2021-01-24 op close_conn(fds, c);
630 d3a08f4d 2021-01-17 op cgi_poll_on_child(struct pollfd *fds, struct client *c)
634 d3a08f4d 2021-01-17 op if (c->waiting_on_child)
636 d3a08f4d 2021-01-17 op c->waiting_on_child = 1;
638 d3a08f4d 2021-01-17 op fds->events = POLLIN;
640 d3a08f4d 2021-01-17 op fd = fds->fd;
641 d3a08f4d 2021-01-17 op fds->fd = c->fd;
646 d3a08f4d 2021-01-17 op cgi_poll_on_client(struct pollfd *fds, struct client *c)
650 d3a08f4d 2021-01-17 op if (!c->waiting_on_child)
652 d3a08f4d 2021-01-17 op c->waiting_on_child = 0;
654 d3a08f4d 2021-01-17 op fd = fds->fd;
655 d3a08f4d 2021-01-17 op fds->fd = c->fd;
659 3309ef97 2021-01-23 op /* handle the read from the child process. Return like read(2) */
660 3309ef97 2021-01-23 op static ssize_t
661 3309ef97 2021-01-23 op read_from_cgi(struct client *c)
667 3309ef97 2021-01-23 op /* if we haven't read a whole response line, we want to
668 3309ef97 2021-01-23 op * continue reading. */
670 3309ef97 2021-01-23 op if (c->code == -1) {
671 3309ef97 2021-01-23 op buf = c->sbuf + c->len;
672 3309ef97 2021-01-23 op len = sizeof(c->sbuf) - c->len;
674 3309ef97 2021-01-23 op buf = c->sbuf;
675 3309ef97 2021-01-23 op len = sizeof(c->sbuf);
678 3309ef97 2021-01-23 op r = read(c->fd, buf, len);
679 3309ef97 2021-01-23 op if (r == 0 || r == -1)
685 3309ef97 2021-01-23 op if (c->code != -1)
688 3309ef97 2021-01-23 op if (strchr(c->sbuf, '\n') || c->len == sizeof(c->sbuf)) {
690 3309ef97 2021-01-23 op log_request(c, c->sbuf, c->len);
697 d3a08f4d 2021-01-17 op handle_cgi(struct pollfd *fds, struct client *c)
701 d3a08f4d 2021-01-17 op /* ensure c->fd is the child and fds->fd the client */
702 d3a08f4d 2021-01-17 op cgi_poll_on_client(fds, c);
705 3309ef97 2021-01-23 op if (c->code == -1 || c->len == 0) {
706 3309ef97 2021-01-23 op switch (r = read_from_cgi(c)) {
711 d3a08f4d 2021-01-17 op if (errno == EAGAIN || errno == EWOULDBLOCK) {
712 d3a08f4d 2021-01-17 op cgi_poll_on_child(fds, c);
719 3309ef97 2021-01-23 op if (c->code == -1) {
720 3309ef97 2021-01-23 op cgi_poll_on_child(fds, c);
724 d3a08f4d 2021-01-17 op while (c->len > 0) {
725 d3a08f4d 2021-01-17 op switch (r = tls_write(c->ctx, c->sbuf + c->off, c->len)) {
729 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
730 d3a08f4d 2021-01-17 op fds->events = POLLOUT;
733 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
734 d3a08f4d 2021-01-17 op fds->events = POLLIN;
746 36162ed8 2021-01-22 op close_conn(fds, c);
750 36162ed8 2021-01-22 op close_conn(struct pollfd *pfd, struct client *c)
752 d3a08f4d 2021-01-17 op c->state = S_CLOSING;
754 d3a08f4d 2021-01-17 op switch (tls_close(c->ctx)) {
755 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
756 d3a08f4d 2021-01-17 op pfd->events = POLLIN;
758 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
759 d3a08f4d 2021-01-17 op pfd->events = POLLOUT;
763 d3a08f4d 2021-01-17 op connected_clients--;
765 d3a08f4d 2021-01-17 op tls_free(c->ctx);
766 d3a08f4d 2021-01-17 op c->ctx = NULL;
768 d3a08f4d 2021-01-17 op if (c->buf != MAP_FAILED)
769 d3a08f4d 2021-01-17 op munmap(c->buf, c->len);
771 d3a08f4d 2021-01-17 op if (c->fd != -1)
772 d3a08f4d 2021-01-17 op close(c->fd);
774 252908e6 2021-01-24 op if (c->dir != NULL)
775 252908e6 2021-01-24 op closedir(c->dir);
777 d3a08f4d 2021-01-17 op close(pfd->fd);
778 d3a08f4d 2021-01-17 op pfd->fd = -1;
782 d3a08f4d 2021-01-17 op do_accept(int sock, struct tls *ctx, struct pollfd *fds, struct client *clients)
785 d3a08f4d 2021-01-17 op struct sockaddr_storage addr;
786 d3a08f4d 2021-01-17 op socklen_t len;
788 d3a08f4d 2021-01-17 op len = sizeof(addr);
789 d3a08f4d 2021-01-17 op if ((fd = accept(sock, (struct sockaddr*)&addr, &len)) == -1) {
790 d3a08f4d 2021-01-17 op if (errno == EWOULDBLOCK)
792 d3a08f4d 2021-01-17 op fatal("accept: %s", strerror(errno));
795 d3a08f4d 2021-01-17 op mark_nonblock(fd);
797 d3a08f4d 2021-01-17 op for (i = 0; i < MAX_USERS; ++i) {
798 d3a08f4d 2021-01-17 op if (fds[i].fd == -1) {
799 d3a08f4d 2021-01-17 op bzero(&clients[i], sizeof(struct client));
800 d3a08f4d 2021-01-17 op if (tls_accept_socket(ctx, &clients[i].ctx, fd) == -1)
801 d3a08f4d 2021-01-17 op break; /* goodbye fd! */
803 d3a08f4d 2021-01-17 op fds[i].fd = fd;
804 d3a08f4d 2021-01-17 op fds[i].events = POLLIN;
806 d3a08f4d 2021-01-17 op clients[i].state = S_HANDSHAKE;
807 a87f6625 2021-01-24 op clients[i].next = S_SENDING_FILE;
808 d3a08f4d 2021-01-17 op clients[i].fd = -1;
809 d3a08f4d 2021-01-17 op clients[i].waiting_on_child = 0;
810 d3a08f4d 2021-01-17 op clients[i].buf = MAP_FAILED;
811 252908e6 2021-01-24 op clients[i].dir = NULL;
812 d3a08f4d 2021-01-17 op clients[i].addr = addr;
814 d3a08f4d 2021-01-17 op connected_clients++;
823 d3a08f4d 2021-01-17 op handle(struct pollfd *fds, struct client *client)
825 d3a08f4d 2021-01-17 op switch (client->state) {
826 d3a08f4d 2021-01-17 op case S_HANDSHAKE:
827 d3a08f4d 2021-01-17 op handle_handshake(fds, client);
831 d3a08f4d 2021-01-17 op handle_open_conn(fds, client);
834 d3a08f4d 2021-01-17 op case S_INITIALIZING:
835 a87f6625 2021-01-24 op start_reply(fds, client, client->code, client->meta);
838 a87f6625 2021-01-24 op case S_SENDING_FILE:
839 a87f6625 2021-01-24 op send_file(fds, client);
842 252908e6 2021-01-24 op case S_SENDING_DIR:
843 252908e6 2021-01-24 op send_directory_listing(fds, client);
846 a87f6625 2021-01-24 op case S_SENDING_CGI:
847 a87f6625 2021-01-24 op handle_cgi(fds, client);
850 d3a08f4d 2021-01-17 op case S_CLOSING:
851 36162ed8 2021-01-22 op close_conn(fds, client);
855 d3a08f4d 2021-01-17 op /* unreachable */
861 d3a08f4d 2021-01-17 op loop(struct tls *ctx, int sock4, int sock6)
864 d3a08f4d 2021-01-17 op struct client clients[MAX_USERS];
865 d3a08f4d 2021-01-17 op struct pollfd fds[MAX_USERS];
867 d3a08f4d 2021-01-17 op connected_clients = 0;
869 d3a08f4d 2021-01-17 op for (i = 0; i < MAX_USERS; ++i) {
870 d3a08f4d 2021-01-17 op fds[i].fd = -1;
871 d3a08f4d 2021-01-17 op fds[i].events = POLLIN;
872 d3a08f4d 2021-01-17 op bzero(&clients[i], sizeof(struct client));
875 d3a08f4d 2021-01-17 op fds[0].fd = sock4;
876 d3a08f4d 2021-01-17 op fds[1].fd = sock6;
879 d3a08f4d 2021-01-17 op if (poll(fds, MAX_USERS, INFTIM) == -1) {
880 d3a08f4d 2021-01-17 op if (errno == EINTR) {
881 132cae8c 2021-01-18 op fprintf(stderr, "connected clients: %d\n",
882 d3a08f4d 2021-01-17 op connected_clients);
885 d3a08f4d 2021-01-17 op fatal("poll: %s", strerror(errno));
888 d3a08f4d 2021-01-17 op for (i = 0; i < MAX_USERS; i++) {
889 d3a08f4d 2021-01-17 op if (fds[i].revents == 0)
892 d3a08f4d 2021-01-17 op if (fds[i].revents & (POLLERR|POLLNVAL))
893 d3a08f4d 2021-01-17 op fatal("bad fd %d: %s", fds[i].fd,
894 d3a08f4d 2021-01-17 op strerror(errno));
896 d3a08f4d 2021-01-17 op if (fds[i].revents & POLLHUP) {
897 d3a08f4d 2021-01-17 op /* fds[i] may be the fd of the stdin
898 d3a08f4d 2021-01-17 op * of a cgi script that has exited. */
899 d3a08f4d 2021-01-17 op if (!clients[i].waiting_on_child) {
900 36162ed8 2021-01-22 op close_conn(&fds[i], &clients[i]);
905 d3a08f4d 2021-01-17 op if (fds[i].fd == sock4)
906 d3a08f4d 2021-01-17 op do_accept(sock4, ctx, fds, clients);
907 d3a08f4d 2021-01-17 op else if (fds[i].fd == sock6)
908 d3a08f4d 2021-01-17 op do_accept(sock6, ctx, fds, clients);
910 d3a08f4d 2021-01-17 op handle(&fds[i], &clients[i]);