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;
37 caad0308 2021-01-27 op if (v == NULL || path == NULL)
40 6016a593 2021-01-30 op for (loc = &v->locations[1]; loc->match != NULL; ++loc) {
41 c8b74339 2021-01-24 op if (!fnmatch(loc->match, path, 0)) {
42 c8b74339 2021-01-24 op if (loc->lang != NULL)
43 6016a593 2021-01-30 op return loc->lang;
47 6016a593 2021-01-30 op return v->locations[0].lang;
51 c8b74339 2021-01-24 op vhost_default_mime(struct vhost *v, const char *path)
53 c8b74339 2021-01-24 op struct location *loc;
54 c8b74339 2021-01-24 op const char *default_mime = "application/octet-stream";
56 caad0308 2021-01-27 op if (v == NULL || path == NULL)
57 caad0308 2021-01-27 op return default_mime;
59 6016a593 2021-01-30 op for (loc = &v->locations[1]; loc->match != NULL; ++loc) {
60 c8b74339 2021-01-24 op if (!fnmatch(loc->match, path, 0)) {
61 c8b74339 2021-01-24 op if (loc->default_mime != NULL)
62 6016a593 2021-01-30 op return loc->default_mime;
66 6016a593 2021-01-30 op if (v->locations[0].default_mime != NULL)
67 6016a593 2021-01-30 op return v->locations[0].default_mime;
68 c8b74339 2021-01-24 op return default_mime;
72 c8b74339 2021-01-24 op vhost_index(struct vhost *v, const char *path)
74 c8b74339 2021-01-24 op struct location *loc;
75 c8b74339 2021-01-24 op const char *index = "index.gmi";
77 caad0308 2021-01-27 op if (v == NULL || path == NULL)
80 6016a593 2021-01-30 op for (loc = &v->locations[1]; loc->match != NULL; ++loc) {
81 c8b74339 2021-01-24 op if (!fnmatch(loc->match, path, 0)) {
82 c8b74339 2021-01-24 op if (loc->index != NULL)
83 6016a593 2021-01-30 op return loc->index;
87 b59f3cdd 2021-01-30 op if (v->locations[0].index != NULL)
88 b59f3cdd 2021-01-30 op return v->locations[0].index;
93 252908e6 2021-01-24 op vhost_auto_index(struct vhost *v, const char *path)
95 252908e6 2021-01-24 op struct location *loc;
97 6016a593 2021-01-30 op if (v == NULL || path == NULL)
100 252908e6 2021-01-24 op for (loc = v->locations; loc->match != NULL; ++loc) {
101 252908e6 2021-01-24 op if (!fnmatch(loc->match, path, 0)) {
102 6016a593 2021-01-30 op if (loc->auto_index != 0)
103 6016a593 2021-01-30 op return loc->auto_index == 1;
107 6016a593 2021-01-30 op return v->locations[0].auto_index == 1;
111 d3a08f4d 2021-01-17 op check_path(struct client *c, const char *path, int *fd)
113 d3a08f4d 2021-01-17 op struct stat sb;
114 d1ca3911 2021-01-21 op const char *p;
117 d3a08f4d 2021-01-17 op assert(path != NULL);
119 d1ca3911 2021-01-21 op if (*path == '\0')
121 d1ca3911 2021-01-21 op else if (*path == '/')
122 d1ca3911 2021-01-21 op /* in send_dir we add an initial / (to be
123 d1ca3911 2021-01-21 op * redirect-friendly), but here we want to skip it */
128 252908e6 2021-01-24 op flags = O_RDONLY | O_NOFOLLOW;
130 252908e6 2021-01-24 op if (*fd == -1 && (*fd = openat(c->host->dirfd, p, flags)) == -1)
131 d3a08f4d 2021-01-17 op return FILE_MISSING;
133 d3a08f4d 2021-01-17 op if (fstat(*fd, &sb) == -1) {
134 d3a08f4d 2021-01-17 op LOGN(c, "failed stat for %s: %s", path, strerror(errno));
135 d3a08f4d 2021-01-17 op return FILE_MISSING;
138 d3a08f4d 2021-01-17 op if (S_ISDIR(sb.st_mode))
139 d3a08f4d 2021-01-17 op return FILE_DIRECTORY;
141 d3a08f4d 2021-01-17 op if (sb.st_mode & S_IXUSR)
142 d3a08f4d 2021-01-17 op return FILE_EXECUTABLE;
144 d3a08f4d 2021-01-17 op return FILE_EXISTS;
148 0be51733 2021-01-20 op open_file(struct pollfd *fds, struct client *c)
150 0be51733 2021-01-20 op switch (check_path(c, c->iri.path, &c->fd)) {
151 d3a08f4d 2021-01-17 op case FILE_EXECUTABLE:
152 252908e6 2021-01-24 op if (starts_with(c->iri.path, c->host->cgi)) {
153 07b0a142 2021-01-24 op start_cgi(c->iri.path, "", c->iri.query, fds, c);
157 d3a08f4d 2021-01-17 op /* fallthrough */
159 d3a08f4d 2021-01-17 op case FILE_EXISTS:
160 252908e6 2021-01-24 op load_file(fds, c);
163 d3a08f4d 2021-01-17 op case FILE_DIRECTORY:
164 252908e6 2021-01-24 op open_dir(fds, c);
167 d3a08f4d 2021-01-17 op case FILE_MISSING:
168 07b0a142 2021-01-24 op if (c->host->cgi != NULL && starts_with(c->iri.path, c->host->cgi)) {
169 07b0a142 2021-01-24 op check_for_cgi(c->iri.path, c->iri.query, fds, c);
172 a87f6625 2021-01-24 op start_reply(fds, c, NOT_FOUND, "not found");
176 d3a08f4d 2021-01-17 op /* unreachable */
182 252908e6 2021-01-24 op load_file(struct pollfd *fds, struct client *c)
184 252908e6 2021-01-24 op if ((c->len = filesize(c->fd)) == -1) {
185 252908e6 2021-01-24 op LOGE(c, "failed to get file size for %s", c->iri.path);
186 252908e6 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
190 252908e6 2021-01-24 op if ((c->buf = mmap(NULL, c->len, PROT_READ, MAP_PRIVATE,
191 252908e6 2021-01-24 op c->fd, 0)) == MAP_FAILED) {
192 252908e6 2021-01-24 op LOGW(c, "mmap: %s: %s", c->iri.path, strerror(errno));
193 252908e6 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
196 252908e6 2021-01-24 op c->i = c->buf;
197 252908e6 2021-01-24 op c->next = S_SENDING_FILE;
198 252908e6 2021-01-24 op start_reply(fds, c, SUCCESS, mime(c->host, c->iri.path));
202 d3a08f4d 2021-01-17 op * the inverse of this algorithm, i.e. starting from the start of the
203 d3a08f4d 2021-01-17 op * path + strlen(cgi), and checking if each component, should be
204 d3a08f4d 2021-01-17 op * faster. But it's tedious to write. This does the opposite: starts
205 d3a08f4d 2021-01-17 op * from the end and strip one component at a time, until either an
206 d3a08f4d 2021-01-17 op * executable is found or we emptied the path.
209 d3a08f4d 2021-01-17 op check_for_cgi(char *path, char *query, struct pollfd *fds, struct client *c)
212 d3a08f4d 2021-01-17 op end = strchr(path, '\0');
214 d3a08f4d 2021-01-17 op /* NB: assume CGI is enabled and path matches cgi */
216 d3a08f4d 2021-01-17 op while (end > path) {
217 d3a08f4d 2021-01-17 op /* go up one level. UNIX paths are simple and POSIX
218 d3a08f4d 2021-01-17 op * dirname, with its ambiguities on if the given path
219 d3a08f4d 2021-01-17 op * is changed or not, gives me headaches. */
220 d3a08f4d 2021-01-17 op while (*end != '/')
224 d3a08f4d 2021-01-17 op switch (check_path(c, path, &c->fd)) {
225 d3a08f4d 2021-01-17 op case FILE_EXECUTABLE:
226 07b0a142 2021-01-24 op start_cgi(path, end+1, query, fds,c);
228 d3a08f4d 2021-01-17 op case FILE_MISSING:
239 a87f6625 2021-01-24 op start_reply(fds, c, NOT_FOUND, "not found");
244 d3a08f4d 2021-01-17 op mark_nonblock(int fd)
248 d3a08f4d 2021-01-17 op if ((flags = fcntl(fd, F_GETFL)) == -1)
249 d3a08f4d 2021-01-17 op fatal("fcntl(F_GETFL): %s", strerror(errno));
250 d3a08f4d 2021-01-17 op if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
251 d3a08f4d 2021-01-17 op fatal("fcntl(F_SETFL): %s", strerror(errno));
255 d3a08f4d 2021-01-17 op handle_handshake(struct pollfd *fds, struct client *c)
257 d3a08f4d 2021-01-17 op struct vhost *h;
258 d3a08f4d 2021-01-17 op const char *servname;
259 a8d4a897 2021-01-29 op const char *parse_err = "unknown error";
261 d3a08f4d 2021-01-17 op switch (tls_handshake(c->ctx)) {
262 d3a08f4d 2021-01-17 op case 0: /* success */
263 d3a08f4d 2021-01-17 op case -1: /* already handshaked */
265 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
266 d3a08f4d 2021-01-17 op fds->events = POLLIN;
268 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
269 d3a08f4d 2021-01-17 op fds->events = POLLOUT;
272 d3a08f4d 2021-01-17 op /* unreachable */
276 d3a08f4d 2021-01-17 op servname = tls_conn_servername(c->ctx);
277 a8d4a897 2021-01-29 op if (!puny_decode(servname, c->domain, sizeof(c->domain), &parse_err)) {
278 a8d4a897 2021-01-29 op LOGI(c, "%s", parse_err);
282 d3a08f4d 2021-01-17 op for (h = hosts; h->domain != NULL; ++h) {
283 3300cbe0 2021-01-27 op if (!fnmatch(h->domain, c->domain, 0))
287 90cb9eea 2021-01-28 op /* LOGD(c, "handshake: SNI: \"%s\"; decoded: \"%s\"; matched: \"%s\"", */
288 90cb9eea 2021-01-28 op /* servname != NULL ? servname : "(null)", */
289 90cb9eea 2021-01-28 op /* c->domain, */
290 90cb9eea 2021-01-28 op /* h->domain != NULL ? h->domain : "(null)"); */
292 d3a08f4d 2021-01-17 op if (h->domain != NULL) {
293 d3a08f4d 2021-01-17 op c->state = S_OPEN;
295 d3a08f4d 2021-01-17 op handle_open_conn(fds, c);
300 0ab65593 2021-01-21 op if (servname != NULL)
301 0ab65593 2021-01-21 op strncpy(c->req, servname, sizeof(c->req));
303 0ab65593 2021-01-21 op strncpy(c->req, "null", sizeof(c->req));
305 a8d4a897 2021-01-29 op start_reply(fds, c, BAD_REQUEST, "Wrong/malformed host or missing SNI");
309 d3a08f4d 2021-01-17 op handle_open_conn(struct pollfd *fds, struct client *c)
311 d3a08f4d 2021-01-17 op const char *parse_err = "invalid request";
312 3300cbe0 2021-01-27 op char decoded[DOMAIN_NAME_LEN];
314 0be51733 2021-01-20 op bzero(c->req, sizeof(c->req));
315 0be51733 2021-01-20 op bzero(&c->iri, sizeof(c->iri));
317 0be51733 2021-01-20 op switch (tls_read(c->ctx, c->req, sizeof(c->req)-1)) {
319 d3a08f4d 2021-01-17 op LOGE(c, "tls_read: %s", tls_error(c->ctx));
320 36162ed8 2021-01-22 op close_conn(fds, c);
323 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
324 d3a08f4d 2021-01-17 op fds->events = POLLIN;
327 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
328 d3a08f4d 2021-01-17 op fds->events = POLLOUT;
332 c4f682f8 2021-01-27 op if (!trim_req_iri(c->req, &parse_err)
333 a2fd8013 2021-01-29 op || !parse_iri(c->req, &c->iri, &parse_err)
334 a2fd8013 2021-01-29 op || !puny_decode(c->iri.host, decoded, sizeof(decoded), &parse_err)) {
335 c4f682f8 2021-01-27 op LOGI(c, "iri parse error: %s", parse_err);
336 c4f682f8 2021-01-27 op start_reply(fds, c, BAD_REQUEST, "invalid request");
340 3300cbe0 2021-01-27 op if (c->iri.port_no != conf.port
341 3300cbe0 2021-01-27 op || strcmp(c->iri.schema, "gemini")
342 3300cbe0 2021-01-27 op || strcmp(decoded, c->domain)) {
343 a87f6625 2021-01-24 op start_reply(fds, c, PROXY_REFUSED, "won't proxy request");
347 0be51733 2021-01-20 op open_file(fds, c);
351 df79b4c1 2021-01-19 op start_reply(struct pollfd *pfd, struct client *c, int code, const char *meta)
353 05c23a54 2021-01-19 op char buf[1030]; /* status + ' ' + max reply len + \r\n\0 */
354 c8b74339 2021-01-24 op const char *lang;
357 df79b4c1 2021-01-19 op c->code = code;
358 df79b4c1 2021-01-19 op c->meta = meta;
359 df79b4c1 2021-01-19 op c->state = S_INITIALIZING;
361 c8b74339 2021-01-24 op lang = vhost_lang(c->host, c->iri.path);
363 05c23a54 2021-01-19 op snprintf(buf, sizeof(buf), "%d ", code);
364 df79b4c1 2021-01-19 op strlcat(buf, meta, sizeof(buf));
365 c8b74339 2021-01-24 op if (!strcmp(meta, "text/gemini") && lang != NULL) {
366 05c23a54 2021-01-19 op strlcat(buf, "; lang=", sizeof(buf));
367 c8b74339 2021-01-24 op strlcat(buf, lang, sizeof(buf));
370 05c23a54 2021-01-19 op len = strlcat(buf, "\r\n", sizeof(buf));
371 0be51733 2021-01-20 op assert(len < sizeof(buf));
373 df79b4c1 2021-01-19 op switch (tls_write(c->ctx, buf, len)) {
375 a87f6625 2021-01-24 op close_conn(pfd, c);
377 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
378 d3a08f4d 2021-01-17 op pfd->events = POLLIN;
380 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
381 d3a08f4d 2021-01-17 op pfd->events = POLLOUT;
385 a87f6625 2021-01-24 op log_request(c, buf, sizeof(buf));
387 a87f6625 2021-01-24 op /* we don't need a body */
388 a87f6625 2021-01-24 op if (c->code != SUCCESS) {
389 a87f6625 2021-01-24 op close_conn(pfd, c);
393 a87f6625 2021-01-24 op /* advance the state machine */
394 a87f6625 2021-01-24 op c->state = c->next;
395 a87f6625 2021-01-24 op handle(pfd, c);
399 d3a08f4d 2021-01-17 op start_cgi(const char *spath, const char *relpath, const char *query,
400 d3a08f4d 2021-01-17 op struct pollfd *fds, struct client *c)
402 d3a08f4d 2021-01-17 op char addr[NI_MAXHOST];
403 d3a08f4d 2021-01-17 op const char *ruser, *cissuer, *chash;
406 d3a08f4d 2021-01-17 op e = getnameinfo((struct sockaddr*)&c->addr, sizeof(c->addr),
407 d3a08f4d 2021-01-17 op addr, sizeof(addr),
409 d3a08f4d 2021-01-17 op NI_NUMERICHOST);
413 d3a08f4d 2021-01-17 op if (tls_peer_cert_provided(c->ctx)) {
414 d3a08f4d 2021-01-17 op ruser = tls_peer_cert_subject(c->ctx);
415 d3a08f4d 2021-01-17 op cissuer = tls_peer_cert_issuer(c->ctx);
416 d3a08f4d 2021-01-17 op chash = tls_peer_cert_hash(c->ctx);
418 d3a08f4d 2021-01-17 op ruser = NULL;
419 d3a08f4d 2021-01-17 op cissuer = NULL;
420 d3a08f4d 2021-01-17 op chash = NULL;
423 d3a08f4d 2021-01-17 op if (!send_string(exfd, spath)
424 d3a08f4d 2021-01-17 op || !send_string(exfd, relpath)
425 d3a08f4d 2021-01-17 op || !send_string(exfd, query)
426 d3a08f4d 2021-01-17 op || !send_string(exfd, addr)
427 d3a08f4d 2021-01-17 op || !send_string(exfd, ruser)
428 d3a08f4d 2021-01-17 op || !send_string(exfd, cissuer)
429 d3a08f4d 2021-01-17 op || !send_string(exfd, chash)
430 d3a08f4d 2021-01-17 op || !send_vhost(exfd, c->host))
433 d3a08f4d 2021-01-17 op close(c->fd);
434 d3a08f4d 2021-01-17 op if ((c->fd = recv_fd(exfd)) == -1) {
435 a87f6625 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
438 a87f6625 2021-01-24 op c->state = S_SENDING_CGI;
439 d3a08f4d 2021-01-17 op cgi_poll_on_child(fds, c);
440 0be51733 2021-01-20 op c->code = -1;
441 d3a08f4d 2021-01-17 op /* handle_cgi(fds, c); */
445 d3a08f4d 2021-01-17 op /* fatal("cannot talk to the executor process: %s", strerror(errno)); */
446 132cae8c 2021-01-18 op fatal("cannot talk to the executor process");
450 0be51733 2021-01-20 op send_file(struct pollfd *fds, struct client *c)
452 d3a08f4d 2021-01-17 op ssize_t ret, len;
454 06f233ad 2021-01-21 op /* ensure the correct state */
455 a87f6625 2021-01-24 op c->state = S_SENDING_FILE;
457 d3a08f4d 2021-01-17 op len = (c->buf + c->len) - c->i;
459 d3a08f4d 2021-01-17 op while (len > 0) {
460 d3a08f4d 2021-01-17 op switch (ret = tls_write(c->ctx, c->i, len)) {
462 d3a08f4d 2021-01-17 op LOGE(c, "tls_write: %s", tls_error(c->ctx));
463 36162ed8 2021-01-22 op close_conn(fds, c);
466 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
467 d3a08f4d 2021-01-17 op fds->events = POLLIN;
470 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
471 d3a08f4d 2021-01-17 op fds->events = POLLOUT;
481 36162ed8 2021-01-22 op close_conn(fds, c);
485 252908e6 2021-01-24 op open_dir(struct pollfd *fds, struct client *c)
489 252908e6 2021-01-24 op char *before_file;
491 0be51733 2021-01-20 op len = strlen(c->iri.path);
492 252908e6 2021-01-24 op if (len > 0 && !ends_with(c->iri.path, "/")) {
493 252908e6 2021-01-24 op redirect_canonical_dir(fds, c);
497 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
498 d1ca3911 2021-01-21 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
499 d1ca3911 2021-01-21 op if (!ends_with(c->sbuf, "/"))
500 0be51733 2021-01-20 op strlcat(c->sbuf, "/", sizeof(c->sbuf));
501 252908e6 2021-01-24 op before_file = strchr(c->sbuf, '\0');
502 c8b74339 2021-01-24 op len = strlcat(c->sbuf, vhost_index(c->host, c->iri.path),
503 c8b74339 2021-01-24 op sizeof(c->sbuf));
504 252908e6 2021-01-24 op if (len >= sizeof(c->sbuf)) {
505 252908e6 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
509 252908e6 2021-01-24 op c->iri.path = c->sbuf;
511 252908e6 2021-01-24 op /* close later unless we have to generate the dir listing */
512 252908e6 2021-01-24 op dirfd = c->fd;
515 252908e6 2021-01-24 op switch (check_path(c, c->iri.path, &c->fd)) {
516 252908e6 2021-01-24 op case FILE_EXECUTABLE:
517 252908e6 2021-01-24 op if (starts_with(c->iri.path, c->host->cgi)) {
518 252908e6 2021-01-24 op start_cgi(c->iri.path, "", c->iri.query, fds, c);
522 252908e6 2021-01-24 op /* fallthrough */
524 252908e6 2021-01-24 op case FILE_EXISTS:
525 252908e6 2021-01-24 op load_file(fds, c);
528 252908e6 2021-01-24 op case FILE_DIRECTORY:
529 252908e6 2021-01-24 op start_reply(fds, c, TEMP_REDIRECT, c->sbuf);
532 252908e6 2021-01-24 op case FILE_MISSING:
533 252908e6 2021-01-24 op *before_file = '\0';
535 252908e6 2021-01-24 op if (!vhost_auto_index(c->host, c->iri.path)) {
536 252908e6 2021-01-24 op start_reply(fds, c, NOT_FOUND, "not found");
540 252908e6 2021-01-24 op c->fd = dirfd;
541 252908e6 2021-01-24 op c->next = S_SENDING_DIR;
543 252908e6 2021-01-24 op if ((c->dir = fdopendir(c->fd)) == NULL) {
544 252908e6 2021-01-24 op LOGE(c, "can't fdopendir(%d) (vhost:%s) %s: %s",
545 252908e6 2021-01-24 op c->fd, c->host->domain, c->iri.path, strerror(errno));
546 252908e6 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
551 252908e6 2021-01-24 op start_reply(fds, c, SUCCESS, "text/gemini");
555 252908e6 2021-01-24 op /* unreachable */
559 252908e6 2021-01-24 op close(dirfd);
563 252908e6 2021-01-24 op redirect_canonical_dir(struct pollfd *fds, struct client *c)
567 252908e6 2021-01-24 op strlcpy(c->sbuf, "/", sizeof(c->sbuf));
568 252908e6 2021-01-24 op strlcat(c->sbuf, c->iri.path, sizeof(c->sbuf));
569 252908e6 2021-01-24 op len = strlcat(c->sbuf, "/", sizeof(c->sbuf));
571 0be51733 2021-01-20 op if (len >= sizeof(c->sbuf)) {
572 a87f6625 2021-01-24 op start_reply(fds, c, TEMP_FAILURE, "internal server error");
576 252908e6 2021-01-24 op start_reply(fds, c, TEMP_REDIRECT, c->sbuf);
580 252908e6 2021-01-24 op read_next_dir_entry(struct client *c)
582 252908e6 2021-01-24 op struct dirent *d;
586 252908e6 2021-01-24 op if ((d = readdir(c->dir)) == NULL) {
587 252908e6 2021-01-24 op if (errno != 0)
588 252908e6 2021-01-24 op LOGE(c, "readdir: %s", strerror(errno));
591 252908e6 2021-01-24 op } while (!strcmp(d->d_name, "."));
593 252908e6 2021-01-24 op /* XXX: url escape */
594 252908e6 2021-01-24 op snprintf(c->sbuf, sizeof(c->sbuf), "=> %s %s\n",
595 252908e6 2021-01-24 op d->d_name, d->d_name);
596 252908e6 2021-01-24 op c->len = strlen(c->sbuf);
603 252908e6 2021-01-24 op send_directory_listing(struct pollfd *fds, struct client *c)
608 252908e6 2021-01-24 op if (c->len == 0) {
609 252908e6 2021-01-24 op if (!read_next_dir_entry(c))
613 252908e6 2021-01-24 op while (c->len > 0) {
614 252908e6 2021-01-24 op switch (r = tls_write(c->ctx, c->sbuf + c->off, c->len)) {
618 252908e6 2021-01-24 op case TLS_WANT_POLLOUT:
619 252908e6 2021-01-24 op fds->events = POLLOUT;
622 252908e6 2021-01-24 op case TLS_WANT_POLLIN:
623 252908e6 2021-01-24 op fds->events = POLLIN;
635 252908e6 2021-01-24 op close_conn(fds, c);
639 d3a08f4d 2021-01-17 op cgi_poll_on_child(struct pollfd *fds, struct client *c)
643 d3a08f4d 2021-01-17 op if (c->waiting_on_child)
645 d3a08f4d 2021-01-17 op c->waiting_on_child = 1;
647 d3a08f4d 2021-01-17 op fds->events = POLLIN;
649 d3a08f4d 2021-01-17 op fd = fds->fd;
650 d3a08f4d 2021-01-17 op fds->fd = c->fd;
655 d3a08f4d 2021-01-17 op cgi_poll_on_client(struct pollfd *fds, struct client *c)
659 d3a08f4d 2021-01-17 op if (!c->waiting_on_child)
661 d3a08f4d 2021-01-17 op c->waiting_on_child = 0;
663 d3a08f4d 2021-01-17 op fd = fds->fd;
664 d3a08f4d 2021-01-17 op fds->fd = c->fd;
668 3309ef97 2021-01-23 op /* handle the read from the child process. Return like read(2) */
669 3309ef97 2021-01-23 op static ssize_t
670 3309ef97 2021-01-23 op read_from_cgi(struct client *c)
676 3309ef97 2021-01-23 op /* if we haven't read a whole response line, we want to
677 3309ef97 2021-01-23 op * continue reading. */
679 3309ef97 2021-01-23 op if (c->code == -1) {
680 3309ef97 2021-01-23 op buf = c->sbuf + c->len;
681 3309ef97 2021-01-23 op len = sizeof(c->sbuf) - c->len;
683 3309ef97 2021-01-23 op buf = c->sbuf;
684 3309ef97 2021-01-23 op len = sizeof(c->sbuf);
687 3309ef97 2021-01-23 op r = read(c->fd, buf, len);
688 3309ef97 2021-01-23 op if (r == 0 || r == -1)
694 3309ef97 2021-01-23 op if (c->code != -1)
697 3309ef97 2021-01-23 op if (strchr(c->sbuf, '\n') || c->len == sizeof(c->sbuf)) {
699 3309ef97 2021-01-23 op log_request(c, c->sbuf, c->len);
706 d3a08f4d 2021-01-17 op handle_cgi(struct pollfd *fds, struct client *c)
710 d3a08f4d 2021-01-17 op /* ensure c->fd is the child and fds->fd the client */
711 d3a08f4d 2021-01-17 op cgi_poll_on_client(fds, c);
714 3309ef97 2021-01-23 op if (c->code == -1 || c->len == 0) {
715 3309ef97 2021-01-23 op switch (r = read_from_cgi(c)) {
720 d3a08f4d 2021-01-17 op if (errno == EAGAIN || errno == EWOULDBLOCK) {
721 d3a08f4d 2021-01-17 op cgi_poll_on_child(fds, c);
728 3309ef97 2021-01-23 op if (c->code == -1) {
729 3309ef97 2021-01-23 op cgi_poll_on_child(fds, c);
733 d3a08f4d 2021-01-17 op while (c->len > 0) {
734 d3a08f4d 2021-01-17 op switch (r = tls_write(c->ctx, c->sbuf + c->off, c->len)) {
738 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
739 d3a08f4d 2021-01-17 op fds->events = POLLOUT;
742 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
743 d3a08f4d 2021-01-17 op fds->events = POLLIN;
755 36162ed8 2021-01-22 op close_conn(fds, c);
759 36162ed8 2021-01-22 op close_conn(struct pollfd *pfd, struct client *c)
761 d3a08f4d 2021-01-17 op c->state = S_CLOSING;
763 d3a08f4d 2021-01-17 op switch (tls_close(c->ctx)) {
764 d3a08f4d 2021-01-17 op case TLS_WANT_POLLIN:
765 d3a08f4d 2021-01-17 op pfd->events = POLLIN;
767 d3a08f4d 2021-01-17 op case TLS_WANT_POLLOUT:
768 d3a08f4d 2021-01-17 op pfd->events = POLLOUT;
772 d3a08f4d 2021-01-17 op connected_clients--;
774 d3a08f4d 2021-01-17 op tls_free(c->ctx);
775 d3a08f4d 2021-01-17 op c->ctx = NULL;
777 d3a08f4d 2021-01-17 op if (c->buf != MAP_FAILED)
778 d3a08f4d 2021-01-17 op munmap(c->buf, c->len);
780 d3a08f4d 2021-01-17 op if (c->fd != -1)
781 d3a08f4d 2021-01-17 op close(c->fd);
783 252908e6 2021-01-24 op if (c->dir != NULL)
784 252908e6 2021-01-24 op closedir(c->dir);
786 d3a08f4d 2021-01-17 op close(pfd->fd);
787 d3a08f4d 2021-01-17 op pfd->fd = -1;
791 d3a08f4d 2021-01-17 op do_accept(int sock, struct tls *ctx, struct pollfd *fds, struct client *clients)
794 d3a08f4d 2021-01-17 op struct sockaddr_storage addr;
795 d3a08f4d 2021-01-17 op socklen_t len;
797 d3a08f4d 2021-01-17 op len = sizeof(addr);
798 d3a08f4d 2021-01-17 op if ((fd = accept(sock, (struct sockaddr*)&addr, &len)) == -1) {
799 d3a08f4d 2021-01-17 op if (errno == EWOULDBLOCK)
801 d3a08f4d 2021-01-17 op fatal("accept: %s", strerror(errno));
804 d3a08f4d 2021-01-17 op mark_nonblock(fd);
806 d3a08f4d 2021-01-17 op for (i = 0; i < MAX_USERS; ++i) {
807 d3a08f4d 2021-01-17 op if (fds[i].fd == -1) {
808 d3a08f4d 2021-01-17 op bzero(&clients[i], sizeof(struct client));
809 d3a08f4d 2021-01-17 op if (tls_accept_socket(ctx, &clients[i].ctx, fd) == -1)
810 d3a08f4d 2021-01-17 op break; /* goodbye fd! */
812 d3a08f4d 2021-01-17 op fds[i].fd = fd;
813 d3a08f4d 2021-01-17 op fds[i].events = POLLIN;
815 d3a08f4d 2021-01-17 op clients[i].state = S_HANDSHAKE;
816 a87f6625 2021-01-24 op clients[i].next = S_SENDING_FILE;
817 d3a08f4d 2021-01-17 op clients[i].fd = -1;
818 d3a08f4d 2021-01-17 op clients[i].waiting_on_child = 0;
819 d3a08f4d 2021-01-17 op clients[i].buf = MAP_FAILED;
820 252908e6 2021-01-24 op clients[i].dir = NULL;
821 d3a08f4d 2021-01-17 op clients[i].addr = addr;
823 d3a08f4d 2021-01-17 op connected_clients++;
832 d3a08f4d 2021-01-17 op handle(struct pollfd *fds, struct client *client)
834 d3a08f4d 2021-01-17 op switch (client->state) {
835 d3a08f4d 2021-01-17 op case S_HANDSHAKE:
836 d3a08f4d 2021-01-17 op handle_handshake(fds, client);
840 d3a08f4d 2021-01-17 op handle_open_conn(fds, client);
843 d3a08f4d 2021-01-17 op case S_INITIALIZING:
844 a87f6625 2021-01-24 op start_reply(fds, client, client->code, client->meta);
847 a87f6625 2021-01-24 op case S_SENDING_FILE:
848 a87f6625 2021-01-24 op send_file(fds, client);
851 252908e6 2021-01-24 op case S_SENDING_DIR:
852 252908e6 2021-01-24 op send_directory_listing(fds, client);
855 a87f6625 2021-01-24 op case S_SENDING_CGI:
856 a87f6625 2021-01-24 op handle_cgi(fds, client);
859 d3a08f4d 2021-01-17 op case S_CLOSING:
860 36162ed8 2021-01-22 op close_conn(fds, client);
864 d3a08f4d 2021-01-17 op /* unreachable */
870 d3a08f4d 2021-01-17 op loop(struct tls *ctx, int sock4, int sock6)
873 d3a08f4d 2021-01-17 op struct client clients[MAX_USERS];
874 d3a08f4d 2021-01-17 op struct pollfd fds[MAX_USERS];
876 d3a08f4d 2021-01-17 op connected_clients = 0;
878 d3a08f4d 2021-01-17 op for (i = 0; i < MAX_USERS; ++i) {
879 d3a08f4d 2021-01-17 op fds[i].fd = -1;
880 d3a08f4d 2021-01-17 op fds[i].events = POLLIN;
881 d3a08f4d 2021-01-17 op bzero(&clients[i], sizeof(struct client));
884 d3a08f4d 2021-01-17 op fds[0].fd = sock4;
885 d3a08f4d 2021-01-17 op fds[1].fd = sock6;
888 d3a08f4d 2021-01-17 op if (poll(fds, MAX_USERS, INFTIM) == -1) {
889 d3a08f4d 2021-01-17 op if (errno == EINTR) {
890 132cae8c 2021-01-18 op fprintf(stderr, "connected clients: %d\n",
891 d3a08f4d 2021-01-17 op connected_clients);
894 d3a08f4d 2021-01-17 op fatal("poll: %s", strerror(errno));
897 d3a08f4d 2021-01-17 op for (i = 0; i < MAX_USERS; i++) {
898 d3a08f4d 2021-01-17 op if (fds[i].revents == 0)
901 d3a08f4d 2021-01-17 op if (fds[i].revents & (POLLERR|POLLNVAL))
902 d3a08f4d 2021-01-17 op fatal("bad fd %d: %s", fds[i].fd,
903 d3a08f4d 2021-01-17 op strerror(errno));
905 d3a08f4d 2021-01-17 op if (fds[i].revents & POLLHUP) {
906 d3a08f4d 2021-01-17 op /* fds[i] may be the fd of the stdin
907 d3a08f4d 2021-01-17 op * of a cgi script that has exited. */
908 d3a08f4d 2021-01-17 op if (!clients[i].waiting_on_child) {
909 36162ed8 2021-01-22 op close_conn(&fds[i], &clients[i]);
914 d3a08f4d 2021-01-17 op if (fds[i].fd == sock4)
915 d3a08f4d 2021-01-17 op do_accept(sock4, ctx, fds, clients);
916 d3a08f4d 2021-01-17 op else if (fds[i].fd == sock6)
917 d3a08f4d 2021-01-17 op do_accept(sock6, ctx, fds, clients);
919 d3a08f4d 2021-01-17 op handle(&fds[i], &clients[i]);