2 * libwebsockets - small server side websockets and web server implementation
4 * Copyright (C) 2010-2016 Andy Green <andy@warmcat.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation:
9 * version 2.1 of the License.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
23 #include "private-libwebsockets.h"
25 #if defined (LWS_WITH_ESP8266)
27 void *memcpy(void *dest, const void *src, size_t n)
29 return ets_memcpy(dest, src, n);
34 lws_context_init_server(struct lws_context_creation_info *info,
35 struct lws_vhost *vhost)
38 int n, opt = 1, limit = 1;
40 lws_sockfd_type sockfd;
46 /* set up our external listening socket we serve on */
48 if (info->port == CONTEXT_PORT_NO_LISTEN || info->port == CONTEXT_PORT_NO_LISTEN_SERVER)
51 vh = vhost->context->vhost_list;
53 if (vh->listen_port == info->port) {
54 if ((!info->iface && !vh->iface) ||
55 (info->iface && vh->iface &&
56 !strcmp(info->iface, vh->iface))) {
57 vhost->listen_port = info->port;
58 vhost->iface = info->iface;
59 lwsl_notice(" using listen skt from vhost %s\n",
69 #if defined(__linux__)
70 limit = vhost->context->count_threads;
73 for (m = 0; m < limit; m++) {
74 #ifdef LWS_USE_UNIX_SOCK
75 if (LWS_UNIX_SOCK_ENABLED(vhost))
76 sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
80 if (LWS_IPV6_ENABLED(vhost))
81 sockfd = socket(AF_INET6, SOCK_STREAM, 0);
84 sockfd = socket(AF_INET, SOCK_STREAM, 0);
88 #if defined(LWS_WITH_ESP8266)
89 sockfd = esp8266_create_tcp_listen_socket(vhost);
90 if (!lws_sockfd_valid(sockfd)) {
93 lwsl_err("ERROR opening socket\n");
96 #if LWS_POSIX && !defined(LWS_WITH_ESP32)
98 #if (defined(WIN32) || defined(_WIN32)) && defined(SO_EXCLUSIVEADDRUSE)
100 * only accept that we are the only listener on the port
101 * https://msdn.microsoft.com/zh-tw/library/windows/desktop/ms740621(v=vs.85).aspx
103 * for lws, to match Linux, we default to exclusive listen
105 if (!lws_check_opt(vhost->options, LWS_SERVER_OPTION_ALLOW_LISTEN_SHARE)) {
106 if (setsockopt(sockfd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE,
107 (const void *)&opt, sizeof(opt)) < 0) {
108 lwsl_err("reuseaddr failed\n");
109 compatible_close(sockfd);
116 * allow us to restart even if old sockets in TIME_WAIT
118 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
119 (const void *)&opt, sizeof(opt)) < 0) {
120 lwsl_err("reuseaddr failed\n");
121 compatible_close(sockfd);
125 #if defined(LWS_USE_IPV6) && defined(IPV6_V6ONLY)
126 if (LWS_IPV6_ENABLED(vhost)) {
127 if (vhost->options & LWS_SERVER_OPTION_IPV6_V6ONLY_MODIFY) {
128 int value = (vhost->options & LWS_SERVER_OPTION_IPV6_V6ONLY_VALUE) ? 1 : 0;
129 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY,
130 (const void*)&value, sizeof(value)) < 0) {
131 compatible_close(sockfd);
138 #if defined(__linux__) && defined(SO_REUSEPORT)
139 n = lws_check_opt(vhost->options, LWS_SERVER_OPTION_ALLOW_LISTEN_SHARE);
145 if (vhost->context->count_threads > 1)
146 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEPORT,
147 (const void *)&opt, sizeof(opt)) < 0) {
148 compatible_close(sockfd);
153 lws_plat_set_socket_options(vhost, sockfd);
156 n = lws_socket_bind(vhost, sockfd, info->port, info->iface);
161 vhost->listen_port = info->port;
162 vhost->iface = info->iface;
164 wsi = lws_zalloc(sizeof(struct lws));
166 lwsl_err("Out of mem\n");
169 wsi->context = vhost->context;
170 wsi->desc.sockfd = sockfd;
171 wsi->mode = LWSCM_SERVER_LISTENER;
172 wsi->protocol = vhost->protocols;
178 if (LWS_LIBUV_ENABLED(vhost->context))
179 lws_uv_initvhost(vhost, wsi);
182 if (insert_wsi_socket_into_fds(vhost->context, wsi))
185 vhost->context->count_wsi_allocated++;
186 vhost->lserv_wsi = wsi;
189 n = listen(wsi->desc.sockfd, LWS_SOMAXCONN);
191 lwsl_err("listen failed with error %d\n", LWS_ERRNO);
192 vhost->lserv_wsi = NULL;
193 vhost->context->count_wsi_allocated--;
194 remove_wsi_socket_from_fds(wsi);
197 } /* for each thread able to independently listen */
199 #if defined(LWS_WITH_ESP8266)
200 esp8266_tcp_stream_bind(wsi->desc.sockfd, info->port, wsi);
203 if (!lws_check_opt(info->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS)) {
204 #ifdef LWS_USE_UNIX_SOCK
205 if (LWS_UNIX_SOCK_ENABLED(vhost))
206 lwsl_notice(" Listening on \"%s\"\n", info->iface);
209 lwsl_notice(" Listening on port %d\n", info->port);
215 compatible_close(sockfd);
220 #if defined(LWS_WITH_ESP8266)
222 #define strchr ets_strchr
226 lws_select_vhost(struct lws_context *context, int port, const char *servername)
228 struct lws_vhost *vhost = context->vhost_list;
232 n = strlen(servername);
234 p = strchr(servername, ':');
236 colon = p - servername;
238 /* Priotity 1: first try exact matches */
241 if (port == vhost->listen_port &&
242 !strncmp(vhost->name, servername, colon)) {
243 lwsl_info("SNI: Found: %s\n", servername);
246 vhost = vhost->vhost_next;
250 * Priority 2: if no exact matches, try matching *.vhost-name
251 * unintentional matches are possible but resolve to x.com for *.x.com
252 * which is reasonable. If exact match exists we already chose it and
253 * never reach here. SSL will still fail it if the cert doesn't allow
257 vhost = context->vhost_list;
259 m = strlen(vhost->name);
260 if (port == vhost->listen_port &&
262 servername[colon - m - 1] == '.' &&
263 !strncmp(vhost->name, servername + colon - m, m)) {
264 lwsl_info("SNI: Found %s on wildcard: %s\n",
265 servername, vhost->name);
268 vhost = vhost->vhost_next;
271 /* Priority 3: match the first vhost on our port */
273 vhost = context->vhost_list;
275 if (port == vhost->listen_port) {
276 lwsl_info("vhost match to %s based on port %d\n",
280 vhost = vhost->vhost_next;
288 LWS_VISIBLE LWS_EXTERN const char *
289 lws_get_mimetype(const char *file, const struct lws_http_mount *m)
291 int n = strlen(file);
292 const struct lws_protocol_vhost_options *pvo = NULL;
295 pvo = m->extra_mimetypes;
300 if (!strcmp(&file[n - 4], ".ico"))
301 return "image/x-icon";
303 if (!strcmp(&file[n - 4], ".gif"))
306 if (!strcmp(&file[n - 3], ".js"))
307 return "text/javascript";
309 if (!strcmp(&file[n - 4], ".png"))
312 if (!strcmp(&file[n - 4], ".jpg"))
315 if (!strcmp(&file[n - 3], ".gz"))
316 return "application/gzip";
318 if (!strcmp(&file[n - 4], ".JPG"))
321 if (!strcmp(&file[n - 5], ".html"))
324 if (!strcmp(&file[n - 4], ".css"))
327 if (!strcmp(&file[n - 4], ".txt"))
330 if (!strcmp(&file[n - 4], ".svg"))
331 return "image/svg+xml";
333 if (!strcmp(&file[n - 4], ".ttf"))
334 return "application/x-font-ttf";
336 if (!strcmp(&file[n - 4], ".otf"))
337 return "application/font-woff";
339 if (!strcmp(&file[n - 5], ".woff"))
340 return "application/font-woff";
342 if (!strcmp(&file[n - 4], ".xml"))
343 return "application/xml";
346 if (pvo->name[0] == '*') /* ie, match anything */
349 if (!strcmp(&file[n - strlen(pvo->name)], pvo->name))
357 static lws_fop_flags_t
358 lws_vfs_prepare_flags(struct lws *wsi)
360 lws_fop_flags_t f = 0;
362 if (!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_ACCEPT_ENCODING))
365 if (strstr(lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_ACCEPT_ENCODING),
367 lwsl_info("client indicates GZIP is acceptable\n");
368 f |= LWS_FOP_FLAG_COMPR_ACCEPTABLE_GZIP;
375 lws_http_serve(struct lws *wsi, char *uri, const char *origin,
376 const struct lws_http_mount *m)
378 const struct lws_protocol_vhost_options *pvo = m->interpret;
379 struct lws_process_html_args args;
380 const char *mimetype;
381 #if !defined(_WIN32_WCE) && !defined(LWS_WITH_ESP8266)
382 const struct lws_plat_file_ops *fops;
384 lws_fop_flags_t fflags = LWS_O_RDONLY;
385 #if defined(WIN32) && defined(LWS_HAVE__STAT32I64)
386 struct _stat32i64 st;
392 char path[256], sym[512];
393 unsigned char *p = (unsigned char *)sym + 32 + LWS_PRE, *start = p;
394 unsigned char *end = p + sizeof(sym) - 32 - LWS_PRE;
395 #if !defined(WIN32) && LWS_POSIX && !defined(LWS_WITH_ESP32)
400 lws_snprintf(path, sizeof(path) - 1, "%s/%s", origin, uri);
402 #if !defined(_WIN32_WCE) && !defined(LWS_WITH_ESP8266)
404 fflags |= lws_vfs_prepare_flags(wsi);
408 fops = lws_vfs_select_fops(wsi->context->fops, path, &vpath);
410 if (wsi->u.http.fop_fd)
411 lws_vfs_file_close(&wsi->u.http.fop_fd);
413 wsi->u.http.fop_fd = fops->LWS_FOP_OPEN(wsi->context->fops,
414 path, vpath, &fflags);
415 if (!wsi->u.http.fop_fd) {
416 lwsl_err("Unable to open '%s'\n", path);
421 /* if it can't be statted, don't try */
422 if (fflags & LWS_FOP_FLAG_VIRTUAL)
424 #if defined(LWS_WITH_ESP32)
428 if (fstat(wsi->u.http.fop_fd->fd, &st)) {
429 lwsl_info("unable to stat %s\n", path);
433 #if defined(LWS_HAVE__STAT32I64)
434 if (_stat32i64(path, &st)) {
435 lwsl_info("unable to stat %s\n", path);
439 if (stat(path, &st)) {
440 lwsl_info("unable to stat %s\n", path);
446 wsi->u.http.fop_fd->mod_time = (uint32_t)st.st_mtime;
447 fflags |= LWS_FOP_FLAG_MOD_TIME_VALID;
449 lwsl_debug(" %s mode %d\n", path, S_IFMT & st.st_mode);
450 #if !defined(WIN32) && LWS_POSIX && !defined(LWS_WITH_ESP32)
451 if ((S_IFMT & st.st_mode) == S_IFLNK) {
452 len = readlink(path, sym, sizeof(sym) - 1);
454 lwsl_err("Failed to read link %s\n", path);
458 lwsl_debug("symlink %s -> %s\n", path, sym);
459 lws_snprintf(path, sizeof(path) - 1, "%s", sym);
462 if ((S_IFMT & st.st_mode) == S_IFDIR) {
463 lwsl_debug("default filename append to dir\n");
464 lws_snprintf(path, sizeof(path) - 1, "%s/%s/index.html",
468 } while ((S_IFMT & st.st_mode) != S_IFREG && spin < 5);
471 lwsl_err("symlink loop %s \n", path);
473 n = sprintf(sym, "%08llX%08lX",
474 (unsigned long long)lws_vfs_get_length(wsi->u.http.fop_fd),
475 (unsigned long)lws_vfs_get_mod_time(wsi->u.http.fop_fd));
477 /* disable ranges if IF_RANGE token invalid */
479 if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_IF_RANGE))
480 if (strcmp(sym, lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_IF_RANGE)))
481 /* differs - defeat Range: */
482 wsi->u.http.ah->frag_index[WSI_TOKEN_HTTP_RANGE] = 0;
484 if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_IF_NONE_MATCH)) {
486 * he thinks he has some version of it already,
487 * check if the tag matches
489 if (!strcmp(sym, lws_hdr_simple_ptr(wsi,
490 WSI_TOKEN_HTTP_IF_NONE_MATCH))) {
492 lwsl_debug("%s: ETAG match %s %s\n", __func__,
495 /* we don't need to send the payload */
496 if (lws_add_http_header_status(wsi,
497 HTTP_STATUS_NOT_MODIFIED, &p, end))
500 if (lws_add_http_header_by_token(wsi,
502 (unsigned char *)sym, n, &p, end))
505 if (lws_finalize_http_header(wsi, &p, end))
508 n = lws_write(wsi, start, p - start,
509 LWS_WRITE_HTTP_HEADERS);
510 if (n != (p - start)) {
511 lwsl_err("_write returned %d from %ld\n", n,
516 lws_vfs_file_close(&wsi->u.http.fop_fd);
518 return lws_http_transaction_completed(wsi);
522 if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_ETAG,
523 (unsigned char *)sym, n, &p, end))
527 mimetype = lws_get_mimetype(path, m);
529 lwsl_err("unknown mimetype for %s\n", path);
533 lwsl_debug("sending no mimetype for %s\n", path);
535 wsi->sending_chunked = 0;
538 * check if this is in the list of file suffixes to be interpreted by
543 if (n > (int)strlen(pvo->name) &&
544 !strcmp(&path[n - strlen(pvo->name)], pvo->name)) {
545 wsi->sending_chunked = 1;
546 wsi->protocol_interpret_idx = (char)(lws_intptr_t)pvo->value;
547 lwsl_info("want %s interpreted by %s\n", path,
548 wsi->vhost->protocols[(int)(lws_intptr_t)(pvo->value)].name);
549 wsi->protocol = &wsi->vhost->protocols[(int)(lws_intptr_t)(pvo->value)];
550 if (lws_ensure_user_space(wsi))
558 const struct lws_protocols *pp = lws_vhost_name_to_protocol(
559 wsi->vhost, m->protocol);
561 if (lws_bind_protocol(wsi, pp))
564 args.max_len = end - p;
565 if (pp->callback(wsi, LWS_CALLBACK_ADD_HEADERS,
566 wsi->user_space, &args, 0))
568 p = (unsigned char *)args.p;
571 n = lws_serve_http_file(wsi, path, mimetype, (char *)start, p - start);
573 if (n < 0 || ((n > 0) && lws_http_transaction_completed(wsi)))
574 return -1; /* error or can't reuse connection: close the socket */
582 const struct lws_http_mount *
583 lws_find_mount(struct lws *wsi, const char *uri_ptr, int uri_len)
585 const struct lws_http_mount *hm, *hit = NULL;
588 hm = wsi->vhost->mount_list;
590 if (uri_len >= hm->mountpoint_len &&
591 !strncmp(uri_ptr, hm->mountpoint, hm->mountpoint_len) &&
592 (uri_ptr[hm->mountpoint_len] == '\0' ||
593 uri_ptr[hm->mountpoint_len] == '/' ||
594 hm->mountpoint_len == 1)
596 if (hm->origin_protocol == LWSMPRO_CALLBACK ||
597 ((hm->origin_protocol == LWSMPRO_CGI ||
598 lws_hdr_total_length(wsi, WSI_TOKEN_GET_URI) ||
600 hm->mountpoint_len > best)) {
601 best = hm->mountpoint_len;
614 lws_find_string_in_file(const char *filename, const char *string, int stringlen)
617 int fd, match = 0, pos = 0, n = 0, hit = 0;
619 fd = open(filename, O_RDONLY);
621 lwsl_err("can't open auth file: %s\n", filename);
627 n = read(fd, buf, sizeof(buf));
629 if (match == stringlen)
636 if (match == stringlen) {
637 if (buf[pos] == '\r' || buf[pos] == '\n') {
644 if (buf[pos] == string[match])
658 lws_unauthorised_basic_auth(struct lws *wsi)
660 struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
661 unsigned char *start = pt->serv_buf + LWS_PRE,
662 *p = start, *end = p + 512;
666 /* no auth... tell him it is required */
668 if (lws_add_http_header_status(wsi, HTTP_STATUS_UNAUTHORIZED, &p, end))
671 n = lws_snprintf(buf, sizeof(buf), "Basic realm=\"lwsws\"");
672 if (lws_add_http_header_by_token(wsi,
673 WSI_TOKEN_HTTP_WWW_AUTHENTICATE,
674 (unsigned char *)buf, n, &p, end))
677 if (lws_finalize_http_header(wsi, &p, end))
680 n = lws_write(wsi, start, p - start, LWS_WRITE_HTTP_HEADERS);
684 return lws_http_transaction_completed(wsi);
690 int lws_clean_url(char *p)
692 if (p[0] == 'h' && p[1] == 't' && p[2] == 't' && p[3] == 'p') {
704 if (p[0] == '/' && p[1] == '/') {
719 lws_http_action(struct lws *wsi)
721 struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
722 enum http_connection_type connection_type;
723 enum http_version request_version;
724 char content_length_str[32];
725 struct lws_process_html_args args;
726 const struct lws_http_mount *hit = NULL;
727 unsigned int n, count = 0;
728 char http_version_str[10];
729 char http_conn_str[20];
730 int http_version_len;
731 char *uri_ptr = NULL, *s;
735 static const unsigned char methods[] = {
738 WSI_TOKEN_OPTIONS_URI,
741 WSI_TOKEN_DELETE_URI,
744 WSI_TOKEN_HTTP_COLON_PATH,
747 #if defined(_DEBUG) || defined(LWS_WITH_ACCESS_LOG)
748 static const char * const method_names[] = {
749 "GET", "POST", "OPTIONS", "PUT", "PATCH", "DELETE", "CONNECT",
755 static const char * const oprot[] = {
756 "http://", "https://"
759 /* it's not websocket.... shall we accept it as http? */
761 for (n = 0; n < ARRAY_SIZE(methods); n++)
762 if (lws_hdr_total_length(wsi, methods[n]))
765 lwsl_warn("Missing URI in HTTP request\n");
770 lwsl_warn("multiple methods?\n");
774 if (lws_ensure_user_space(wsi))
777 for (n = 0; n < ARRAY_SIZE(methods); n++)
778 if (lws_hdr_total_length(wsi, methods[n])) {
779 uri_ptr = lws_hdr_simple_ptr(wsi, methods[n]);
780 uri_len = lws_hdr_total_length(wsi, methods[n]);
781 lwsl_info("Method: %s request for '%s'\n",
782 method_names[n], uri_ptr);
789 /* we insist on absolute paths */
791 if (!uri_ptr || uri_ptr[0] != '/') {
792 lws_return_http_status(wsi, HTTP_STATUS_FORBIDDEN, NULL);
797 /* HTTP header had a content length? */
799 wsi->u.http.content_length = 0;
800 if (lws_hdr_total_length(wsi, WSI_TOKEN_POST_URI) ||
801 lws_hdr_total_length(wsi, WSI_TOKEN_PATCH_URI) ||
802 lws_hdr_total_length(wsi, WSI_TOKEN_PUT_URI))
803 wsi->u.http.content_length = 100 * 1024 * 1024;
805 if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_CONTENT_LENGTH)) {
806 lws_hdr_copy(wsi, content_length_str,
807 sizeof(content_length_str) - 1,
808 WSI_TOKEN_HTTP_CONTENT_LENGTH);
809 wsi->u.http.content_length = atoll(content_length_str);
812 if (wsi->http2_substream) {
813 wsi->u.http.request_version = HTTP_VERSION_2;
815 /* http_version? Default to 1.0, override with token: */
816 request_version = HTTP_VERSION_1_0;
818 /* Works for single digit HTTP versions. : */
819 http_version_len = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP);
820 if (http_version_len > 7) {
821 lws_hdr_copy(wsi, http_version_str,
822 sizeof(http_version_str) - 1, WSI_TOKEN_HTTP);
823 if (http_version_str[5] == '1' && http_version_str[7] == '1')
824 request_version = HTTP_VERSION_1_1;
826 wsi->u.http.request_version = request_version;
828 /* HTTP/1.1 defaults to "keep-alive", 1.0 to "close" */
829 if (request_version == HTTP_VERSION_1_1)
830 connection_type = HTTP_CONNECTION_KEEP_ALIVE;
832 connection_type = HTTP_CONNECTION_CLOSE;
834 /* Override default if http "Connection:" header: */
835 if (lws_hdr_total_length(wsi, WSI_TOKEN_CONNECTION)) {
836 lws_hdr_copy(wsi, http_conn_str, sizeof(http_conn_str) - 1,
837 WSI_TOKEN_CONNECTION);
838 http_conn_str[sizeof(http_conn_str) - 1] = '\0';
839 if (!strcasecmp(http_conn_str, "keep-alive"))
840 connection_type = HTTP_CONNECTION_KEEP_ALIVE;
842 if (!strcasecmp(http_conn_str, "close"))
843 connection_type = HTTP_CONNECTION_CLOSE;
845 wsi->u.http.connection_type = connection_type;
848 n = wsi->protocol->callback(wsi, LWS_CALLBACK_FILTER_HTTP_CONNECTION,
849 wsi->user_space, uri_ptr, uri_len);
851 lwsl_info("LWS_CALLBACK_HTTP closing\n");
856 * if there is content supposed to be coming,
857 * put a timeout on it having arrived
859 lws_set_timeout(wsi, PENDING_TIMEOUT_HTTP_CONTENT,
860 wsi->context->timeout_secs);
861 #ifdef LWS_OPENSSL_SUPPORT
862 if (wsi->redirect_to_https) {
864 * we accepted http:// only so we could redirect to
865 * https://, so issue the redirect. Create the redirection
866 * URI from the host: header and ignore the path part
868 unsigned char *start = pt->serv_buf + LWS_PRE, *p = start,
871 if (!lws_hdr_total_length(wsi, WSI_TOKEN_HOST))
874 n = sprintf((char *)end, "https://%s/",
875 lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST));
877 n = lws_http_redirect(wsi, HTTP_STATUS_MOVED_PERMANENTLY,
882 return lws_http_transaction_completed(wsi);
886 #ifdef LWS_WITH_ACCESS_LOG
888 * Produce Apache-compatible log string for wsi, like this:
890 * 2.31.234.19 - - [27/Mar/2016:03:22:44 +0800]
891 * "GET /aep-screen.png HTTP/1.1"
892 * 200 152987 "https://libwebsockets.org/index.html"
893 * "Mozilla/5.0 (Macint... Chrome/49.0.2623.87 Safari/537.36"
897 static const char * const hver[] = {
898 "http/1.0", "http/1.1", "http/2"
901 char ads[INET6_ADDRSTRLEN];
903 char ads[INET_ADDRSTRLEN];
908 time_t t = time(NULL);
911 if (wsi->access_log_pending)
914 wsi->access_log.header_log = lws_malloc(l);
915 if (wsi->access_log.header_log) {
919 strftime(da, sizeof(da), "%d/%b/%Y:%H:%M:%S %z", tmp);
921 strcpy(da, "01/Jan/1970:00:00:00 +0000");
923 pa = lws_get_peer_simple(wsi, ads, sizeof(ads));
927 me = method_names[meth];
929 lws_snprintf(wsi->access_log.header_log, l,
930 "%s - - [%s] \"%s %s %s\"",
932 hver[wsi->u.http.request_version]);
934 l = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_USER_AGENT);
936 wsi->access_log.user_agent = lws_malloc(l + 2);
937 if (wsi->access_log.user_agent)
938 lws_hdr_copy(wsi, wsi->access_log.user_agent,
939 l + 1, WSI_TOKEN_HTTP_USER_AGENT);
941 lwsl_err("OOM getting user agent\n");
943 wsi->access_log_pending = 1;
948 /* can we serve it from the mount list? */
950 hit = lws_find_mount(wsi, uri_ptr, uri_len);
952 /* deferred cleanup and reset to protocols[0] */
954 lwsl_info("no hit\n");
956 if (lws_bind_protocol(wsi, &wsi->vhost->protocols[0]))
959 n = wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP,
960 wsi->user_space, uri_ptr, uri_len);
965 s = uri_ptr + hit->mountpoint_len;
968 * if we have a mountpoint like https://xxx.com/yyy
969 * there is an implied / at the end for our purposes since
970 * we can only mount on a "directory".
972 * But if we just go with that, the browser cannot understand
973 * that he is actually looking down one "directory level", so
974 * even though we give him /yyy/abc.html he acts like the
975 * current directory level is /. So relative urls like "x.png"
976 * wrongly look outside the mountpoint.
978 * Therefore if we didn't come in on a url with an explicit
979 * / at the end, we must redirect to add it so the browser
980 * understands he is one "directory level" down.
982 if ((hit->mountpoint_len > 1 ||
983 (hit->origin_protocol == LWSMPRO_REDIR_HTTP ||
984 hit->origin_protocol == LWSMPRO_REDIR_HTTPS)) &&
986 (hit->origin_protocol == LWSMPRO_REDIR_HTTP ||
987 hit->origin_protocol == LWSMPRO_REDIR_HTTPS)) &&
988 (hit->origin_protocol != LWSMPRO_CGI &&
989 hit->origin_protocol != LWSMPRO_CALLBACK //&&
990 //hit->protocol == NULL
992 unsigned char *start = pt->serv_buf + LWS_PRE,
993 *p = start, *end = p + 512;
995 lwsl_debug("Doing 301 '%s' org %s\n", s, hit->origin);
997 if (!lws_hdr_total_length(wsi, WSI_TOKEN_HOST))
1000 /* > at start indicates deal with by redirect */
1001 if (hit->origin_protocol == LWSMPRO_REDIR_HTTP ||
1002 hit->origin_protocol == LWSMPRO_REDIR_HTTPS)
1003 n = lws_snprintf((char *)end, 256, "%s%s",
1004 oprot[hit->origin_protocol & 1],
1007 n = lws_snprintf((char *)end, 256,
1008 "%s%s%s/", oprot[!!lws_is_ssl(wsi)],
1009 lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST),
1012 lwsl_notice("%s\n", end);
1013 lws_clean_url((char *)end);
1014 lwsl_notice("%s\n", end);
1016 n = lws_http_redirect(wsi, HTTP_STATUS_MOVED_PERMANENTLY,
1021 return lws_http_transaction_completed(wsi);
1027 if (hit->basic_auth_login_file) {
1028 char b64[160], plain[(sizeof(b64) * 3) / 4];
1031 /* Did he send auth? */
1032 if (!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_AUTHORIZATION))
1033 return lws_unauthorised_basic_auth(wsi);
1035 n = HTTP_STATUS_FORBIDDEN;
1037 m = lws_hdr_copy(wsi, b64, sizeof(b64), WSI_TOKEN_HTTP_AUTHORIZATION);
1039 lwsl_err("b64 auth too long\n");
1040 goto transaction_result_n;
1044 if (strcasecmp(b64, "Basic")) {
1045 lwsl_err("auth missing basic: %s\n", b64);
1046 goto transaction_result_n;
1049 /* It'll be like Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l */
1051 m = lws_b64_decode_string(b64 + 6, plain, sizeof(plain));
1053 lwsl_err("plain auth too long\n");
1054 goto transaction_result_n;
1057 // lwsl_notice(plain);
1059 if (!lws_find_string_in_file(hit->basic_auth_login_file, plain, m)) {
1060 lwsl_err("basic auth lookup failed\n");
1061 return lws_unauthorised_basic_auth(wsi);
1064 lwsl_notice("basic auth accepted\n");
1066 /* accept the auth */
1070 #if defined(LWS_WITH_HTTP_PROXY)
1072 * The mount is a reverse proxy?
1075 if (hit->origin_protocol == LWSMPRO_HTTPS ||
1076 hit->origin_protocol == LWSMPRO_HTTP) {
1077 struct lws_client_connect_info i;
1078 char ads[96], rpath[256], *pcolon, *pslash, *p;
1081 memset(&i, 0, sizeof(i));
1082 i.context = lws_get_context(wsi);
1084 pcolon = strchr(hit->origin, ':');
1085 pslash = strchr(hit->origin, '/');
1087 lwsl_err("Proxy mount origin '%s' must have /\n", hit->origin);
1090 if (pcolon > pslash)
1094 n = pcolon - hit->origin;
1096 n = pslash - hit->origin;
1098 if (n >= sizeof(ads) - 2)
1099 n = sizeof(ads) - 2;
1101 memcpy(ads, hit->origin, n);
1106 if (hit->origin_protocol == LWSMPRO_HTTPS) {
1108 i.ssl_connection = 1;
1111 i.port = atoi(pcolon + 1);
1113 lws_snprintf(rpath, sizeof(rpath) - 1, "/%s/%s", pslash + 1, uri_ptr + hit->mountpoint_len);
1114 lws_clean_url(rpath);
1115 na = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_URI_ARGS);
1117 p = rpath + strlen(rpath);
1119 lws_hdr_copy(wsi, p, &rpath[sizeof(rpath) - 1] - p, WSI_TOKEN_HTTP_URI_ARGS);
1133 i.uri_replace_from = hit->origin;
1134 i.uri_replace_to = hit->mountpoint;
1136 lwsl_notice("proxying to %s port %d url %s, ssl %d, from %s, to %s\n",
1137 i.address, i.port, i.path, i.ssl_connection, i.uri_replace_from, i.uri_replace_to);
1139 if (!lws_client_connect_via_info(&i)) {
1140 lwsl_err("proxy connect fail\n");
1149 * A particular protocol callback is mounted here?
1151 * For the duration of this http transaction, bind us to the
1152 * associated protocol
1154 if (hit->origin_protocol == LWSMPRO_CALLBACK || hit->protocol) {
1155 const struct lws_protocols *pp;
1156 const char *name = hit->origin;
1158 name = hit->protocol;
1160 pp = lws_vhost_name_to_protocol(wsi->vhost, name);
1163 lwsl_err("Unable to find plugin '%s'\n",
1168 if (lws_bind_protocol(wsi, pp))
1173 args.max_len = hit->auth_mask;
1174 args.final = 0; /* used to signal callback dealt with it */
1176 n = wsi->protocol->callback(wsi, LWS_CALLBACK_CHECK_ACCESS_RIGHTS,
1177 wsi->user_space, &args, 0);
1179 lws_return_http_status(wsi, HTTP_STATUS_UNAUTHORIZED,
1183 if (args.final) /* callback completely handled it well */
1186 if (hit->cgienv && wsi->protocol->callback(wsi,
1187 LWS_CALLBACK_HTTP_PMO,
1188 wsi->user_space, (void *)hit->cgienv, 0))
1191 if (lws_hdr_total_length(wsi, WSI_TOKEN_POST_URI)) {
1192 n = wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP,
1194 uri_ptr + hit->mountpoint_len,
1195 uri_len - hit->mountpoint_len);
1201 /* did we hit something with a cgi:// origin? */
1202 if (hit->origin_protocol == LWSMPRO_CGI) {
1203 const char *cmd[] = {
1204 NULL, /* replace with cgi path */
1208 lwsl_debug("%s: cgi\n", __func__);
1209 cmd[0] = hit->origin;
1212 if (hit->cgi_timeout)
1213 n = hit->cgi_timeout;
1215 n = lws_cgi(wsi, cmd, hit->mountpoint_len, n,
1218 lwsl_err("%s: cgi failed\n", __func__);
1227 if (s[0] == '\0' || (n == 1 && s[n - 1] == '/'))
1228 s = (char *)hit->def;
1232 wsi->cache_secs = hit->cache_max_age;
1233 wsi->cache_reuse = hit->cache_reusable;
1234 wsi->cache_revalidate = hit->cache_revalidate;
1235 wsi->cache_intermediaries = hit->cache_intermediaries;
1237 n = lws_http_serve(wsi, s, hit->origin, hit);
1240 * lws_return_http_status(wsi, HTTP_STATUS_NOT_FOUND, NULL);
1242 if (hit->protocol) {
1243 const struct lws_protocols *pp = lws_vhost_name_to_protocol(
1244 wsi->vhost, hit->protocol);
1246 if (lws_bind_protocol(wsi, pp))
1249 n = pp->callback(wsi, LWS_CALLBACK_HTTP,
1251 uri_ptr + hit->mountpoint_len,
1252 uri_len - hit->mountpoint_len);
1254 n = wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP,
1255 wsi->user_space, uri_ptr, uri_len);
1260 lwsl_info("LWS_CALLBACK_HTTP closing\n");
1269 * If we're not issuing a file, check for content_length or
1270 * HTTP keep-alive. No keep-alive header allocation for
1271 * ISSUING_FILE, as this uses HTTP/1.0.
1273 * In any case, return 0 and let lws_read decide how to
1274 * proceed based on state
1276 if (wsi->state != LWSS_HTTP_ISSUING_FILE)
1277 /* Prepare to read body if we have a content length: */
1278 if (wsi->u.http.content_length > 0)
1279 wsi->state = LWSS_HTTP_BODY;
1284 /* we're closing, losing some rx is OK */
1285 lws_header_table_force_to_detachable_state(wsi);
1286 // lwsl_notice("%s: drop1\n", __func__);
1287 lws_header_table_detach(wsi, 1);
1291 transaction_result_n:
1292 lws_return_http_status(wsi, n, NULL);
1294 return lws_http_transaction_completed(wsi);
1299 lws_server_init_wsi_for_ws(struct lws *wsi)
1303 wsi->state = LWSS_ESTABLISHED;
1304 lws_restart_ws_ping_pong_timer(wsi);
1307 * create the frame buffer for this connection according to the
1308 * size mentioned in the protocol definition. If 0 there, use
1309 * a big default for compatibility
1312 n = wsi->protocol->rx_buffer_size;
1314 n = wsi->context->pt_serv_buf_size;
1316 wsi->u.ws.rx_ubuf = lws_malloc(n + 4 /* 0x0000ffff zlib */);
1317 if (!wsi->u.ws.rx_ubuf) {
1318 lwsl_err("Out of Mem allocating rx buffer %d\n", n);
1321 wsi->u.ws.rx_ubuf_alloc = n;
1322 lwsl_debug("Allocating RX buffer %d\n", n);
1324 #if LWS_POSIX && !defined(LWS_WITH_ESP32)
1325 if (!wsi->parent_carries_io)
1326 if (setsockopt(wsi->desc.sockfd, SOL_SOCKET, SO_SNDBUF,
1327 (const char *)&n, sizeof n)) {
1328 lwsl_warn("Failed to set SNDBUF to %d", n);
1333 /* notify user code that we're ready to roll */
1335 if (wsi->protocol->callback)
1336 if (wsi->protocol->callback(wsi, LWS_CALLBACK_ESTABLISHED,
1338 #ifdef LWS_OPENSSL_SUPPORT
1350 lws_handshake_server(struct lws *wsi, unsigned char **buf, size_t len)
1352 int protocol_len, n = 0, hit, non_space_char_found = 0, m;
1353 struct lws_context *context = lws_get_context(wsi);
1354 struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
1355 struct _lws_header_related hdr;
1356 struct allocated_headers *ah;
1357 unsigned char *obuf = *buf;
1358 char protocol_list[128];
1359 char protocol_name[64];
1363 if (len >= 10000000) {
1364 lwsl_err("%s: assert: len %ld\n", __func__, (long)len);
1368 if (!wsi->u.hdr.ah) {
1369 lwsl_err("%s: assert: NULL ah\n", __func__);
1374 wsi->more_rx_waiting = !!len;
1376 if (wsi->mode != LWSCM_HTTP_SERVING &&
1377 wsi->mode != LWSCM_HTTP_SERVING_ACCEPTED) {
1378 lwsl_err("%s: bad wsi mode %d\n", __func__, wsi->mode);
1382 m = lws_parse(wsi, *(*buf)++);
1386 * we are transitioning from http with
1387 * an AH, to raw. Drop the ah and set
1391 lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
1392 lws_bind_protocol(wsi, &wsi->vhost->protocols[
1394 raw_protocol_index]);
1395 lwsl_info("transition to raw vh %s prot %d\n",
1397 wsi->vhost->raw_protocol_index);
1398 if ((wsi->protocol->callback)(wsi,
1399 LWS_CALLBACK_RAW_ADOPT,
1400 wsi->user_space, NULL, 0))
1403 lws_header_table_force_to_detachable_state(wsi);
1404 lws_union_transition(wsi, LWSCM_RAW);
1405 lws_header_table_detach(wsi, 1);
1407 if (m == 2 && (wsi->protocol->callback)(wsi,
1408 LWS_CALLBACK_RAW_RX,
1409 wsi->user_space, obuf, olen))
1414 lwsl_info("lws_parse failed\n");
1418 if (wsi->u.hdr.parser_state != WSI_PARSING_COMPLETE)
1421 lwsl_parser("%s: lws_parse sees parsing complete\n", __func__);
1422 lwsl_debug("%s: wsi->more_rx_waiting=%d\n", __func__,
1423 wsi->more_rx_waiting);
1425 /* check for unwelcome guests */
1427 if (wsi->context->reject_service_keywords) {
1428 const struct lws_protocol_vhost_options *rej =
1429 wsi->context->reject_service_keywords;
1430 char ua[384], *msg = NULL;
1432 if (lws_hdr_copy(wsi, ua, sizeof(ua) - 1,
1433 WSI_TOKEN_HTTP_USER_AGENT) > 0) {
1434 ua[sizeof(ua) - 1] = '\0';
1436 if (strstr(ua, rej->name)) {
1437 msg = strchr(rej->value, ' ');
1440 lws_return_http_status(wsi, atoi(rej->value), msg);
1442 wsi->vhost->conn_stats.rejected++;
1453 if (lws_hdr_total_length(wsi, WSI_TOKEN_HOST)) {
1454 struct lws_vhost *vhost = lws_select_vhost(
1455 context, wsi->vhost->listen_port,
1456 lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST));
1461 lwsl_info("no host\n");
1463 wsi->vhost->conn_stats.trans++;
1464 if (!wsi->conn_stat_done) {
1465 wsi->vhost->conn_stats.conn++;
1466 wsi->conn_stat_done = 1;
1469 if (lws_hdr_total_length(wsi, WSI_TOKEN_CONNECT)) {
1470 lwsl_info("Changing to RAW mode\n");
1472 goto raw_transition;
1475 wsi->mode = LWSCM_PRE_WS_SERVING_ACCEPT;
1476 lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
1478 /* is this websocket protocol or normal http 1.0? */
1480 if (lws_hdr_total_length(wsi, WSI_TOKEN_UPGRADE)) {
1481 if (!strcasecmp(lws_hdr_simple_ptr(wsi, WSI_TOKEN_UPGRADE),
1483 wsi->vhost->conn_stats.ws_upg++;
1484 lwsl_info("Upgrade to ws\n");
1487 #ifdef LWS_USE_HTTP2
1488 if (!strcasecmp(lws_hdr_simple_ptr(wsi, WSI_TOKEN_UPGRADE),
1490 wsi->vhost->conn_stats.http2_upg++;
1491 lwsl_info("Upgrade to h2c\n");
1495 lwsl_info("Unknown upgrade\n");
1496 /* dunno what he wanted to upgrade to */
1500 /* no upgrade ack... he remained as HTTP */
1502 lwsl_info("No upgrade\n");
1505 lws_union_transition(wsi, LWSCM_HTTP_SERVING_ACCEPTED);
1506 wsi->state = LWSS_HTTP;
1507 wsi->u.http.fop_fd = NULL;
1509 /* expose it at the same offset as u.hdr */
1510 wsi->u.http.ah = ah;
1511 lwsl_debug("%s: wsi %p: ah %p\n", __func__, (void *)wsi,
1512 (void *)wsi->u.hdr.ah);
1514 n = lws_http_action(wsi);
1518 #ifdef LWS_USE_HTTP2
1520 if (!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP2_SETTINGS)) {
1521 lwsl_info("missing http2_settings\n");
1525 lwsl_info("h2c upgrade...\n");
1527 p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP2_SETTINGS);
1528 /* convert the peer's HTTP-Settings */
1529 n = lws_b64_decode_string(p, protocol_list,
1530 sizeof(protocol_list));
1532 lwsl_parser("HTTP2_SETTINGS too long\n");
1536 /* adopt the header info */
1540 lws_union_transition(wsi, LWSCM_HTTP2_SERVING);
1542 /* http2 union member has http union struct at start */
1543 wsi->u.http.ah = ah;
1545 lws_http2_init(&wsi->u.http2.peer_settings);
1546 lws_http2_init(&wsi->u.http2.my_settings);
1550 lws_http2_interpret_settings_payload(&wsi->u.http2.peer_settings,
1551 (unsigned char *)protocol_list, n);
1553 strcpy(protocol_list,
1554 "HTTP/1.1 101 Switching Protocols\x0d\x0a"
1555 "Connection: Upgrade\x0d\x0a"
1556 "Upgrade: h2c\x0d\x0a\x0d\x0a");
1557 n = lws_issue_raw(wsi, (unsigned char *)protocol_list,
1558 strlen(protocol_list));
1559 if (n != strlen(protocol_list)) {
1560 lwsl_debug("http2 switch: ERROR writing to socket\n");
1564 wsi->state = LWSS_HTTP2_AWAIT_CLIENT_PREFACE;
1571 lwsl_err("NULL protocol at lws_read\n");
1576 * Select the first protocol we support from the list
1577 * the client sent us.
1579 * Copy it to remove header fragmentation
1582 if (lws_hdr_copy(wsi, protocol_list, sizeof(protocol_list) - 1,
1583 WSI_TOKEN_PROTOCOL) < 0) {
1584 lwsl_err("protocol list too long");
1588 protocol_len = lws_hdr_total_length(wsi, WSI_TOKEN_PROTOCOL);
1589 protocol_list[protocol_len] = '\0';
1593 while (*p && !hit) {
1595 non_space_char_found = 0;
1596 while (n < sizeof(protocol_name) - 1 && *p &&
1598 // ignore leading spaces
1599 if (!non_space_char_found && *p == ' ') {
1603 non_space_char_found = 1;
1604 protocol_name[n++] = *p++;
1606 protocol_name[n] = '\0';
1610 lwsl_info("checking %s\n", protocol_name);
1613 while (wsi->vhost->protocols[n].callback) {
1614 lwsl_info("try %s\n", wsi->vhost->protocols[n].name);
1616 if (wsi->vhost->protocols[n].name &&
1617 !strcmp(wsi->vhost->protocols[n].name,
1619 wsi->protocol = &wsi->vhost->protocols[n];
1628 /* we didn't find a protocol he wanted? */
1631 if (lws_hdr_simple_ptr(wsi, WSI_TOKEN_PROTOCOL)) {
1632 lwsl_info("No protocol from \"%s\" supported\n",
1637 * some clients only have one protocol and
1638 * do not send the protocol list header...
1639 * allow it and match to the vhost's default
1640 * protocol (which itself defaults to zero)
1642 lwsl_info("defaulting to prot handler %d\n",
1643 wsi->vhost->default_protocol_index);
1644 n = wsi->vhost->default_protocol_index;
1645 wsi->protocol = &wsi->vhost->protocols[
1646 (int)wsi->vhost->default_protocol_index];
1649 /* allocate wsi->user storage */
1650 if (lws_ensure_user_space(wsi))
1654 * Give the user code a chance to study the request and
1655 * have the opportunity to deny it
1657 if ((wsi->protocol->callback)(wsi,
1658 LWS_CALLBACK_FILTER_PROTOCOL_CONNECTION,
1660 lws_hdr_simple_ptr(wsi, WSI_TOKEN_PROTOCOL), 0)) {
1661 lwsl_warn("User code denied connection\n");
1666 * Perform the handshake according to the protocol version the
1670 switch (wsi->ietf_spec_revision) {
1672 lwsl_parser("lws_parse calling handshake_04\n");
1673 if (handshake_0405(context, wsi)) {
1674 lwsl_info("hs0405 has failed the connection\n");
1680 lwsl_info("Unknown client spec version %d\n",
1681 wsi->ietf_spec_revision);
1685 lws_same_vh_protocol_insert(wsi, n);
1687 /* we are upgrading to ws, so http/1.1 and keepalive +
1688 * pipelined header considerations about keeping the ah around
1689 * no longer apply. However it's common for the first ws
1690 * protocol data to have been coalesced with the browser
1691 * upgrade request and to already be in the ah rx buffer.
1694 lwsl_info("%s: %p: inheriting ah in ws mode (rxpos:%d, rxlen:%d)\n",
1695 __func__, wsi, wsi->u.hdr.ah->rxpos,
1696 wsi->u.hdr.ah->rxlen);
1700 lws_union_transition(wsi, LWSCM_WS_SERVING);
1702 * first service is WS mode will notice this, use the RX and
1703 * then detach the ah (caution: we are not in u.hdr union
1704 * mode any more then... ah_temp member is at start the same
1707 * Because rxpos/rxlen shows something in the ah, we will get
1708 * service guaranteed next time around the event loop
1710 * All union members begin with hdr, so we can use it even
1711 * though we transitioned to ws union mode (the ah detach
1712 * code uses it anyway).
1717 lws_server_init_wsi_for_ws(wsi);
1718 lwsl_parser("accepted v%02d connection\n",
1719 wsi->ietf_spec_revision);
1721 /* !!! drop ah unreservedly after ESTABLISHED */
1722 if (!wsi->more_rx_waiting) {
1723 lws_header_table_force_to_detachable_state(wsi);
1725 //lwsl_notice("%p: dropping ah EST\n", wsi);
1726 lws_header_table_detach(wsi, 1);
1730 } /* while all chars are handled */
1735 /* drop the header info */
1736 /* we're closing, losing some rx is OK */
1737 lws_header_table_force_to_detachable_state(wsi);
1738 //lwsl_notice("%s: drop2\n", __func__);
1739 lws_header_table_detach(wsi, 1);
1745 lws_get_idlest_tsi(struct lws_context *context)
1747 unsigned int lowest = ~0;
1748 int n = 0, hit = -1;
1750 for (; n < context->count_threads; n++) {
1751 if ((unsigned int)context->pt[n].fds_count !=
1752 context->fd_limit_per_thread - 1 &&
1753 (unsigned int)context->pt[n].fds_count < lowest) {
1754 lowest = context->pt[n].fds_count;
1763 lws_create_new_server_wsi(struct lws_vhost *vhost)
1765 struct lws *new_wsi;
1766 int n = lws_get_idlest_tsi(vhost->context);
1769 lwsl_err("no space for new conn\n");
1773 new_wsi = lws_zalloc(sizeof(struct lws));
1774 if (new_wsi == NULL) {
1775 lwsl_err("Out of memory for new connection\n");
1780 lwsl_debug("Accepted wsi %p to context %p, tsi %d\n", new_wsi,
1781 vhost->context, new_wsi->tsi);
1783 new_wsi->vhost = vhost;
1784 new_wsi->context = vhost->context;
1785 new_wsi->pending_timeout = NO_PENDING_TIMEOUT;
1786 new_wsi->rxflow_change_to = LWS_RXFLOW_ALLOW;
1788 /* initialize the instance struct */
1790 new_wsi->state = LWSS_HTTP;
1791 new_wsi->mode = LWSCM_HTTP_SERVING;
1792 new_wsi->hdr_parsing_completed = 0;
1794 #ifdef LWS_OPENSSL_SUPPORT
1795 new_wsi->use_ssl = LWS_SSL_ENABLED(vhost);
1799 * these can only be set once the protocol is known
1800 * we set an unestablished connection's protocol pointer
1801 * to the start of the supported list, so it can look
1802 * for matching ones during the handshake
1804 new_wsi->protocol = vhost->protocols;
1805 new_wsi->user_space = NULL;
1806 new_wsi->ietf_spec_revision = 0;
1807 new_wsi->desc.sockfd = LWS_SOCK_INVALID;
1808 new_wsi->position_in_fds_table = -1;
1810 vhost->context->count_wsi_allocated++;
1813 * outermost create notification for wsi
1814 * no user_space because no protocol selection
1816 vhost->protocols[0].callback(new_wsi, LWS_CALLBACK_WSI_CREATE,
1822 LWS_VISIBLE int LWS_WARN_UNUSED_RESULT
1823 lws_http_transaction_completed(struct lws *wsi)
1825 int n = NO_PENDING_TIMEOUT;
1827 lws_access_log(wsi);
1829 if (!wsi->hdr_parsing_completed) {
1830 lwsl_notice("%s: ignoring, ah parsing incomplete\n", __func__);
1834 lwsl_debug("%s: wsi %p\n", __func__, wsi);
1835 /* if we can't go back to accept new headers, drop the connection */
1836 if (wsi->u.http.connection_type != HTTP_CONNECTION_KEEP_ALIVE) {
1837 lwsl_info("%s: %p: close connection\n", __func__, wsi);
1841 if (lws_bind_protocol(wsi, &wsi->vhost->protocols[0]))
1844 /* otherwise set ourselves up ready to go again */
1845 wsi->state = LWSS_HTTP;
1846 wsi->mode = LWSCM_HTTP_SERVING;
1847 wsi->u.http.content_length = 0;
1848 wsi->u.http.content_remain = 0;
1849 wsi->hdr_parsing_completed = 0;
1850 #ifdef LWS_WITH_ACCESS_LOG
1851 wsi->access_log.sent = 0;
1854 if (wsi->vhost->keepalive_timeout)
1855 n = PENDING_TIMEOUT_HTTP_KEEPALIVE_IDLE;
1856 lws_set_timeout(wsi, n, wsi->vhost->keepalive_timeout);
1859 * We already know we are on http1.1 / keepalive and the next thing
1860 * coming will be another header set.
1862 * If there is no pending rx and we still have the ah, drop it and
1863 * reacquire a new ah when the new headers start to arrive. (Otherwise
1864 * we needlessly hog an ah indefinitely.)
1866 * However if there is pending rx and we know from the keepalive state
1867 * that is already at least the start of another header set, simply
1868 * reset the existing header table and keep it.
1870 if (wsi->u.hdr.ah) {
1871 lwsl_info("%s: wsi->more_rx_waiting=%d\n", __func__,
1872 wsi->more_rx_waiting);
1874 if (!wsi->more_rx_waiting) {
1875 lws_header_table_force_to_detachable_state(wsi);
1876 lws_header_table_detach(wsi, 1);
1877 #ifdef LWS_OPENSSL_SUPPORT
1879 * additionally... if we are hogging an SSL instance
1880 * with no pending pipelined headers (or ah now), and
1881 * SSL is scarce, drop this connection without waiting
1884 if (wsi->vhost->use_ssl &&
1885 wsi->context->simultaneous_ssl_restriction &&
1886 wsi->context->simultaneous_ssl ==
1887 wsi->context->simultaneous_ssl_restriction) {
1888 lwsl_info("%s: simultaneous_ssl_restriction and nothing pipelined\n", __func__);
1893 lws_header_table_reset(wsi, 1);
1896 /* If we're (re)starting on headers, need other implied init */
1897 wsi->u.hdr.ues = URIES_IDLE;
1899 lwsl_info("%s: %p: keep-alive await new transaction\n", __func__, wsi);
1904 /* if not a socket, it's a raw, non-ssl file descriptor */
1906 LWS_VISIBLE struct lws *
1907 lws_adopt_descriptor_vhost(struct lws_vhost *vh, lws_adoption_type type,
1908 lws_sock_file_fd_type fd, const char *vh_prot_name,
1911 struct lws_context *context = vh->context;
1912 struct lws *new_wsi = lws_create_new_server_wsi(vh);
1913 struct lws_context_per_thread *pt;
1917 if (type & LWS_ADOPT_SOCKET && !(type & LWS_ADOPT_WS_PARENTIO))
1918 compatible_close(fd.sockfd);
1921 pt = &context->pt[(int)new_wsi->tsi];
1922 lws_stats_atomic_bump(context, pt, LWSSTATS_C_CONNECTIONS, 1);
1925 new_wsi->parent = parent;
1926 new_wsi->sibling_list = parent->child_list;
1927 parent->child_list = new_wsi;
1929 if (type & LWS_ADOPT_WS_PARENTIO)
1930 new_wsi->parent_carries_io = 1;
1936 new_wsi->protocol = lws_vhost_name_to_protocol(new_wsi->vhost,
1938 if (!new_wsi->protocol) {
1939 lwsl_err("Protocol %s not enabled on vhost %s\n",
1940 vh_prot_name, new_wsi->vhost->name);
1943 if (lws_ensure_user_space(new_wsi)) {
1944 lwsl_notice("OOM trying to get user_space\n");
1947 if (type & LWS_ADOPT_WS_PARENTIO) {
1948 new_wsi->desc.sockfd = LWS_SOCK_INVALID;
1949 lwsl_debug("binding to %s\n", new_wsi->protocol->name);
1950 lws_bind_protocol(new_wsi, new_wsi->protocol);
1951 lws_union_transition(new_wsi, LWSCM_WS_SERVING);
1952 lws_server_init_wsi_for_ws(new_wsi);
1957 if (type & LWS_ADOPT_HTTP) /* he will transition later */
1959 &vh->protocols[vh->default_protocol_index];
1960 else { /* this is the only time he will transition */
1961 lws_bind_protocol(new_wsi,
1962 &vh->protocols[vh->raw_protocol_index]);
1963 lws_union_transition(new_wsi, LWSCM_RAW);
1966 if (type & LWS_ADOPT_SOCKET) { /* socket desc */
1967 lwsl_debug("%s: new wsi %p, sockfd %d\n", __func__, new_wsi,
1968 (int)(lws_intptr_t)fd.sockfd);
1970 if (type & LWS_ADOPT_HTTP)
1971 /* the transport is accepted...
1972 * give him time to negotiate */
1973 lws_set_timeout(new_wsi,
1974 PENDING_TIMEOUT_ESTABLISH_WITH_SERVER,
1975 context->timeout_secs);
1978 #if defined(LWS_WITH_ESP8266)
1979 esp8266_tcp_stream_accept(accept_fd, new_wsi);
1982 } else /* file desc */
1983 lwsl_debug("%s: new wsi %p, filefd %d\n", __func__, new_wsi,
1984 (int)(lws_intptr_t)fd.filefd);
1987 * A new connection was accepted. Give the user a chance to
1988 * set properties of the newly created wsi. There's no protocol
1989 * selected yet so we issue this to the vhosts's default protocol,
1990 * itself by default protocols[0]
1992 n = LWS_CALLBACK_SERVER_NEW_CLIENT_INSTANTIATED;
1993 if (!(type & LWS_ADOPT_HTTP)) {
1994 if (!(type & LWS_ADOPT_SOCKET))
1995 n = LWS_CALLBACK_RAW_ADOPT_FILE;
1997 n = LWS_CALLBACK_RAW_ADOPT;
2000 if (!LWS_SSL_ENABLED(new_wsi->vhost) || !(type & LWS_ADOPT_ALLOW_SSL) ||
2001 !(type & LWS_ADOPT_SOCKET)) {
2003 if (!(type & LWS_ADOPT_HTTP)) {
2004 if (!(type & LWS_ADOPT_SOCKET))
2005 new_wsi->mode = LWSCM_RAW_FILEDESC;
2007 new_wsi->mode = LWSCM_RAW;
2011 if (!(type & LWS_ADOPT_HTTP))
2012 new_wsi->mode = LWSCM_SSL_INIT_RAW;
2014 new_wsi->mode = LWSCM_SSL_INIT;
2019 lws_libev_accept(new_wsi, new_wsi->desc);
2020 lws_libuv_accept(new_wsi, new_wsi->desc);
2021 lws_libevent_accept(new_wsi, new_wsi->desc);
2024 if (insert_wsi_socket_into_fds(context, new_wsi)) {
2025 lwsl_err("%s: fail inserting socket\n", __func__);
2029 if (lws_server_socket_service_ssl(new_wsi, fd.sockfd)) {
2030 lwsl_err("%s: fail ssl negotiation\n", __func__);
2035 * by deferring callback to this point, after insertion to fds,
2036 * lws_callback_on_writable() can work from the callback
2038 if ((new_wsi->protocol->callback)(
2039 new_wsi, n, new_wsi->user_space, NULL, 0))
2042 if (type & LWS_ADOPT_HTTP) {
2043 if (!lws_header_table_attach(new_wsi, 0))
2044 lwsl_debug("Attached ah immediately\n");
2046 lwsl_info("%s: waiting for ah\n", __func__);
2052 if (type & LWS_ADOPT_SOCKET)
2053 lws_close_free_wsi(new_wsi, LWS_CLOSE_STATUS_NOSTATUS);
2058 lwsl_notice("%s: exiting on bail\n", __func__);
2060 parent->child_list = new_wsi->sibling_list;
2061 if (new_wsi->user_space)
2062 lws_free(new_wsi->user_space);
2064 compatible_close(fd.sockfd);
2069 LWS_VISIBLE struct lws *
2070 lws_adopt_socket_vhost(struct lws_vhost *vh, lws_sockfd_type accept_fd)
2072 lws_sock_file_fd_type fd;
2074 fd.sockfd = accept_fd;
2075 return lws_adopt_descriptor_vhost(vh, LWS_ADOPT_SOCKET |
2076 LWS_ADOPT_HTTP | LWS_ADOPT_ALLOW_SSL, fd, NULL, NULL);
2079 LWS_VISIBLE struct lws *
2080 lws_adopt_socket(struct lws_context *context, lws_sockfd_type accept_fd)
2082 return lws_adopt_socket_vhost(context->vhost_list, accept_fd);
2085 /* Common read-buffer adoption for lws_adopt_*_readbuf */
2087 adopt_socket_readbuf(struct lws *wsi, const char *readbuf, size_t len)
2089 struct lws_context_per_thread *pt;
2090 struct allocated_headers *ah;
2091 struct lws_pollfd *pfd;
2096 if (!readbuf || len == 0)
2099 if (len > sizeof(ah->rx)) {
2100 lwsl_err("%s: rx in too big\n", __func__);
2105 * we can't process the initial read data until we can attach an ah.
2107 * if one is available, get it and place the data in his ah rxbuf...
2108 * wsi with ah that have pending rxbuf get auto-POLLIN service.
2110 * no autoservice because we didn't get a chance to attach the
2111 * readbuf data to wsi or ah yet, and we will do it next if we get
2114 if (wsi->u.hdr.ah || !lws_header_table_attach(wsi, 0)) {
2116 memcpy(ah->rx, readbuf, len);
2120 lwsl_notice("%s: calling service on readbuf ah\n", __func__);
2121 pt = &wsi->context->pt[(int)wsi->tsi];
2123 /* unlike a normal connect, we have the headers already
2124 * (or the first part of them anyway).
2125 * libuv won't come back and service us without a network
2126 * event, so we need to do the header service right here.
2128 pfd = &pt->fds[wsi->position_in_fds_table];
2129 pfd->revents |= LWS_POLLIN;
2130 lwsl_err("%s: calling service\n", __func__);
2131 if (lws_service_fd_tsi(wsi->context, pfd, wsi->tsi))
2132 /* service closed us */
2137 lwsl_err("%s: deferring handling ah\n", __func__);
2139 * hum if no ah came, we are on the wait list and must defer
2140 * dealing with this until the ah arrives.
2142 * later successful lws_header_table_attach() will apply the
2143 * below to the rx buffer (via lws_header_table_reset()).
2145 wsi->u.hdr.preamble_rx = lws_malloc(len);
2146 if (!wsi->u.hdr.preamble_rx) {
2150 memcpy(wsi->u.hdr.preamble_rx, readbuf, len);
2151 wsi->u.hdr.preamble_rx_len = len;
2156 lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
2161 LWS_VISIBLE struct lws *
2162 lws_adopt_socket_readbuf(struct lws_context *context, lws_sockfd_type accept_fd,
2163 const char *readbuf, size_t len)
2165 return adopt_socket_readbuf(lws_adopt_socket(context, accept_fd), readbuf, len);
2168 LWS_VISIBLE struct lws *
2169 lws_adopt_socket_vhost_readbuf(struct lws_vhost *vhost, lws_sockfd_type accept_fd,
2170 const char *readbuf, size_t len)
2172 return adopt_socket_readbuf(lws_adopt_socket_vhost(vhost, accept_fd), readbuf, len);
2176 lws_server_socket_service(struct lws_context *context, struct lws *wsi,
2177 struct lws_pollfd *pollfd)
2179 struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
2180 lws_sockfd_type accept_fd = LWS_SOCK_INVALID;
2181 struct allocated_headers *ah;
2182 lws_sock_file_fd_type fd;
2183 int opts = LWS_ADOPT_SOCKET | LWS_ADOPT_ALLOW_SSL;
2185 struct sockaddr_storage cli_addr;
2190 // lwsl_notice("%s: mode %d\n", __func__, wsi->mode);
2192 switch (wsi->mode) {
2194 case LWSCM_HTTP_SERVING:
2195 case LWSCM_HTTP_SERVING_ACCEPTED:
2196 case LWSCM_HTTP2_SERVING:
2199 /* handle http headers coming in */
2201 /* pending truncated sends have uber priority */
2203 if (wsi->trunc_len) {
2204 if (!(pollfd->revents & LWS_POLLOUT))
2207 if (lws_issue_raw(wsi, wsi->trunc_alloc +
2209 wsi->trunc_len) < 0)
2212 * we can't afford to allow input processing to send
2213 * something new, so spin around he event loop until
2214 * he doesn't have any partials
2219 /* any incoming data ready? */
2221 if (!(pollfd->revents & pollfd->events & LWS_POLLIN))
2225 * If we previously just did POLLIN when IN and OUT were
2226 * signalled (because POLLIN processing may have used up
2227 * the POLLOUT), don't let that happen twice in a row...
2228 * next time we see the situation favour POLLOUT
2230 #if !defined(LWS_WITH_ESP8266)
2231 if (wsi->favoured_pollin &&
2232 (pollfd->revents & pollfd->events & LWS_POLLOUT)) {
2233 wsi->favoured_pollin = 0;
2238 /* these states imply we MUST have an ah attached */
2240 if (wsi->mode != LWSCM_RAW && (wsi->state == LWSS_HTTP ||
2241 wsi->state == LWSS_HTTP_ISSUING_FILE ||
2242 wsi->state == LWSS_HTTP_HEADERS)) {
2243 if (!wsi->u.hdr.ah) {
2245 //lwsl_err("wsi %p: missing ah\n", wsi);
2246 /* no autoservice beacuse we will do it next */
2247 if (lws_header_table_attach(wsi, 0)) {
2248 lwsl_info("wsi %p: failed to acquire ah\n", wsi);
2254 //lwsl_notice("%s: %p: rxpos:%d rxlen:%d\n", __func__, wsi,
2255 // ah->rxpos, ah->rxlen);
2257 /* if nothing in ah rx buffer, get some fresh rx */
2258 if (ah->rxpos == ah->rxlen) {
2259 ah->rxlen = lws_ssl_capable_read(wsi, ah->rx,
2262 //lwsl_notice("%s: wsi %p, ah->rxlen = %d\r\n",
2263 // __func__, wsi, ah->rxlen);
2264 switch (ah->rxlen) {
2266 lwsl_info("%s: read 0 len\n", __func__);
2267 /* lwsl_info(" state=%d\n", wsi->state); */
2268 // if (!wsi->hdr_parsing_completed)
2269 // lws_header_table_detach(wsi);
2271 case LWS_SSL_CAPABLE_ERROR:
2273 case LWS_SSL_CAPABLE_MORE_SERVICE:
2274 ah->rxlen = ah->rxpos = 0;
2279 * make sure ah does not get detached if we
2280 * have live data in the rx
2283 wsi->more_rx_waiting = 1;
2286 if (!(ah->rxpos != ah->rxlen && ah->rxlen)) {
2287 lwsl_err("%s: assert: rxpos %d, rxlen %d\n",
2288 __func__, ah->rxpos, ah->rxlen);
2293 /* just ignore incoming if waiting for close */
2294 if (wsi->state != LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE &&
2295 wsi->state != LWSS_HTTP_ISSUING_FILE) {
2296 n = lws_read(wsi, ah->rx + ah->rxpos,
2297 ah->rxlen - ah->rxpos);
2298 if (n < 0) /* we closed wsi */
2300 if (wsi->u.hdr.ah) {
2301 if ( wsi->u.hdr.ah->rxlen)
2302 wsi->u.hdr.ah->rxpos += n;
2304 lwsl_debug("%s: wsi %p: ah read rxpos %d, rxlen %d\n", __func__, wsi, wsi->u.hdr.ah->rxpos, wsi->u.hdr.ah->rxlen);
2306 if (lws_header_table_is_in_detachable_state(wsi) &&
2307 (wsi->mode != LWSCM_HTTP_SERVING &&
2308 wsi->mode != LWSCM_HTTP_SERVING_ACCEPTED &&
2309 wsi->mode != LWSCM_HTTP2_SERVING))
2310 lws_header_table_detach(wsi, 1);
2318 len = lws_ssl_capable_read(wsi, pt->serv_buf,
2319 context->pt_serv_buf_size);
2320 lwsl_debug("%s: wsi %p read %d\r\n", __func__, wsi, len);
2323 lwsl_info("%s: read 0 len\n", __func__);
2324 /* lwsl_info(" state=%d\n", wsi->state); */
2325 // if (!wsi->hdr_parsing_completed)
2326 // lws_header_table_detach(wsi);
2328 case LWS_SSL_CAPABLE_ERROR:
2330 case LWS_SSL_CAPABLE_MORE_SERVICE:
2334 if (wsi->mode == LWSCM_RAW) {
2335 n = user_callback_handle_rxflow(wsi->protocol->callback,
2336 wsi, LWS_CALLBACK_RAW_RX,
2337 wsi->user_space, pt->serv_buf, len);
2339 lwsl_info("LWS_CALLBACK_RAW_RX_fail\n");
2345 /* just ignore incoming if waiting for close */
2346 if (wsi->state != LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE &&
2347 wsi->state != LWSS_HTTP_ISSUING_FILE) {
2349 * this may want to send
2350 * (via HTTP callback for example)
2352 n = lws_read(wsi, pt->serv_buf, len);
2353 if (n < 0) /* we closed wsi */
2356 * he may have used up the
2357 * writability above, if we will defer POLLOUT
2358 * processing in favour of POLLIN, note it
2360 if (pollfd->revents & LWS_POLLOUT)
2361 wsi->favoured_pollin = 1;
2367 /* this handles POLLOUT for http serving fragments */
2369 if (!(pollfd->revents & LWS_POLLOUT))
2373 if (lws_change_pollfd(wsi, LWS_POLLOUT, 0)) {
2374 lwsl_notice("%s a\n", __func__);
2378 if (wsi->mode == LWSCM_RAW) {
2379 lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_C_WRITEABLE_CB, 1);
2380 #if defined(LWS_WITH_STATS)
2382 uint64_t ul = time_in_microseconds() - wsi->active_writable_req_us;
2384 lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_MS_WRITABLE_DELAY, ul);
2385 lws_stats_atomic_max(wsi->context, pt, LWSSTATS_MS_WORST_WRITABLE_DELAY, ul);
2386 wsi->active_writable_req_us = 0;
2389 n = user_callback_handle_rxflow(wsi->protocol->callback,
2390 wsi, LWS_CALLBACK_RAW_WRITEABLE,
2391 wsi->user_space, NULL, 0);
2393 lwsl_info("writeable_fail\n");
2399 if (!wsi->hdr_parsing_completed)
2402 if (wsi->state != LWSS_HTTP_ISSUING_FILE) {
2404 lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_C_WRITEABLE_CB, 1);
2405 #if defined(LWS_WITH_STATS)
2407 uint64_t ul = time_in_microseconds() - wsi->active_writable_req_us;
2409 lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_MS_WRITABLE_DELAY, ul);
2410 lws_stats_atomic_max(wsi->context, pt, LWSSTATS_MS_WORST_WRITABLE_DELAY, ul);
2411 wsi->active_writable_req_us = 0;
2415 n = user_callback_handle_rxflow(wsi->protocol->callback,
2416 wsi, LWS_CALLBACK_HTTP_WRITEABLE,
2417 wsi->user_space, NULL, 0);
2419 lwsl_info("writeable_fail\n");
2425 /* >0 == completion, <0 == error
2427 * We'll get a LWS_CALLBACK_HTTP_FILE_COMPLETION callback when
2428 * it's done. That's the case even if we just completed the
2429 * send, so wait for that.
2431 n = lws_serve_http_file_fragment(wsi);
2437 case LWSCM_SERVER_LISTENER:
2440 /* pollin means a client has connected to us then */
2443 if (!(pollfd->revents & LWS_POLLIN) || !(pollfd->events & LWS_POLLIN))
2446 #ifdef LWS_OPENSSL_SUPPORT
2448 * can we really accept it, with regards to SSL limit?
2449 * another vhost may also have had POLLIN on his listener this
2450 * round and used it up already
2453 if (wsi->vhost->use_ssl &&
2454 context->simultaneous_ssl_restriction &&
2455 context->simultaneous_ssl ==
2456 context->simultaneous_ssl_restriction)
2457 /* no... ignore it, he won't come again until we are
2458 * below the simultaneous_ssl_restriction limit and
2459 * POLLIN is enabled on him again
2463 /* listen socket got an unencrypted connection... */
2465 clilen = sizeof(cli_addr);
2466 lws_latency_pre(context, wsi);
2467 accept_fd = accept(pollfd->fd, (struct sockaddr *)&cli_addr,
2469 lws_latency(context, wsi, "listener accept", accept_fd,
2471 if (accept_fd < 0) {
2472 if (LWS_ERRNO == LWS_EAGAIN ||
2473 LWS_ERRNO == LWS_EWOULDBLOCK) {
2474 // lwsl_err("accept asks to try again\n");
2477 lwsl_err("ERROR on accept: %s\n", strerror(LWS_ERRNO));
2481 lws_plat_set_socket_options(wsi->vhost, accept_fd);
2483 #if defined(LWS_USE_IPV6)
2484 lwsl_debug("accepted new conn port %u on fd=%d\n",
2485 ((cli_addr.ss_family == AF_INET6) ?
2486 ntohs(((struct sockaddr_in6 *) &cli_addr)->sin6_port) :
2487 ntohs(((struct sockaddr_in *) &cli_addr)->sin_port)),
2490 lwsl_debug("accepted new conn port %u on fd=%d\n",
2491 ntohs(((struct sockaddr_in *) &cli_addr)->sin_port),
2496 /* not very beautiful... */
2497 accept_fd = (lws_sockfd_type)pollfd;
2500 * look at who we connected to and give user code a chance
2501 * to reject based on client IP. There's no protocol selected
2502 * yet so we issue this to protocols[0]
2504 if ((wsi->vhost->protocols[0].callback)(wsi,
2505 LWS_CALLBACK_FILTER_NETWORK_CONNECTION,
2506 NULL, (void *)(lws_intptr_t)accept_fd, 0)) {
2507 lwsl_debug("Callback denied network connection\n");
2508 compatible_close(accept_fd);
2512 if (!(wsi->vhost->options & LWS_SERVER_OPTION_ONLY_RAW))
2513 opts |= LWS_ADOPT_HTTP;
2515 fd.sockfd = accept_fd;
2516 if (!lws_adopt_descriptor_vhost(wsi->vhost, opts, fd,
2518 /* already closed cleanly as necessary */
2522 } while (pt->fds_count < context->fd_limit_per_thread - 1 &&
2523 lws_poll_listen_fd(&pt->fds[wsi->position_in_fds_table]) > 0);
2531 if (!lws_server_socket_service_ssl(wsi, accept_fd))
2535 lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
2541 lws_serve_http_file(struct lws *wsi, const char *file, const char *content_type,
2542 const char *other_headers, int other_headers_len)
2544 static const char * const intermediates[] = { "private", "public" };
2545 struct lws_context *context = lws_get_context(wsi);
2546 struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
2547 #if defined(LWS_WITH_RANGES)
2548 struct lws_range_parsing *rp = &wsi->u.http.range;
2550 char cache_control[50], *cc = "no-store";
2551 unsigned char *response = pt->serv_buf + LWS_PRE;
2552 unsigned char *p = response;
2553 unsigned char *end = p + context->pt_serv_buf_size - LWS_PRE;
2554 lws_filepos_t computed_total_content_length;
2555 int ret = 0, cclen = 8, n = HTTP_STATUS_OK;
2556 lws_fop_flags_t fflags = LWS_O_RDONLY;
2557 #if defined(LWS_WITH_RANGES)
2560 const struct lws_plat_file_ops *fops;
2564 * We either call the platform fops .open with first arg platform fops,
2565 * or we call fops_zip .open with first arg platform fops, and fops_zip
2566 * open will decide whether to switch to fops_zip or stay with fops_def.
2568 * If wsi->u.http.fop_fd is already set, the caller already opened it
2570 if (!wsi->u.http.fop_fd) {
2571 fops = lws_vfs_select_fops(wsi->context->fops, file, &vpath);
2572 fflags |= lws_vfs_prepare_flags(wsi);
2573 wsi->u.http.fop_fd = fops->LWS_FOP_OPEN(wsi->context->fops,
2574 file, vpath, &fflags);
2575 if (!wsi->u.http.fop_fd) {
2576 lwsl_err("Unable to open '%s'\n", file);
2581 wsi->u.http.filelen = lws_vfs_get_length(wsi->u.http.fop_fd);
2582 computed_total_content_length = wsi->u.http.filelen;
2584 #if defined(LWS_WITH_RANGES)
2585 ranges = lws_ranges_init(wsi, rp, wsi->u.http.filelen);
2587 lwsl_debug("Range count %d\n", ranges);
2590 * 1 range -> 206 + Content-Type: normal; Content-Range;
2591 * more -> 206 + Content-Type: multipart/byteranges
2592 * Repeat the true Content-Type in each multipart header
2593 * along with Content-Range
2596 /* it means he expressed a range in Range:, but it was illegal */
2597 lws_return_http_status(wsi, HTTP_STATUS_REQ_RANGE_NOT_SATISFIABLE, NULL);
2598 if (lws_http_transaction_completed(wsi))
2599 return -1; /* <0 means just hang up */
2601 lws_vfs_file_close(&wsi->u.http.fop_fd);
2603 return 0; /* == 0 means we dealt with the transaction complete */
2606 n = HTTP_STATUS_PARTIAL_CONTENT;
2609 if (lws_add_http_header_status(wsi, n, &p, end))
2612 if ((wsi->u.http.fop_fd->flags & (LWS_FOP_FLAG_COMPR_ACCEPTABLE_GZIP |
2613 LWS_FOP_FLAG_COMPR_IS_GZIP)) ==
2614 (LWS_FOP_FLAG_COMPR_ACCEPTABLE_GZIP | LWS_FOP_FLAG_COMPR_IS_GZIP)) {
2615 if (lws_add_http_header_by_token(wsi,
2616 WSI_TOKEN_HTTP_CONTENT_ENCODING,
2617 (unsigned char *)"gzip", 4, &p, end))
2619 lwsl_info("file is being provided in gzip\n");
2623 #if defined(LWS_WITH_RANGES)
2626 content_type && content_type[0])
2627 if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE,
2628 (unsigned char *)content_type,
2629 strlen(content_type), &p, end))
2632 #if defined(LWS_WITH_RANGES)
2633 if (ranges >= 2) { /* multipart byteranges */
2634 strncpy(wsi->u.http.multipart_content_type, content_type,
2635 sizeof(wsi->u.http.multipart_content_type) - 1);
2636 wsi->u.http.multipart_content_type[
2637 sizeof(wsi->u.http.multipart_content_type) - 1] = '\0';
2638 if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE,
2639 (unsigned char *)"multipart/byteranges; boundary=_lws",
2644 * our overall content length has to include
2646 * - (n + 1) x "_lws\r\n"
2647 * - n x Content-Type: xxx/xxx\r\n
2648 * - n x Content-Range: bytes xxx-yyy/zzz\r\n
2650 * - the actual payloads (aggregated in rp->agg)
2652 * Precompute it for the main response header
2655 computed_total_content_length = (lws_filepos_t)rp->agg +
2656 6 /* final _lws\r\n */;
2658 lws_ranges_reset(rp);
2659 while (lws_ranges_next(rp)) {
2660 n = lws_snprintf(cache_control, sizeof(cache_control),
2661 "bytes %llu-%llu/%llu",
2662 rp->start, rp->end, rp->extent);
2664 computed_total_content_length +=
2665 6 /* header _lws\r\n */ +
2666 14 + strlen(content_type) + 2 + /* Content-Type: xxx/xxx\r\n */
2667 15 + n + 2 + /* Content-Range: xxxx\r\n */
2671 lws_ranges_reset(rp);
2672 lws_ranges_next(rp);
2676 computed_total_content_length = (lws_filepos_t)rp->agg;
2677 n = lws_snprintf(cache_control, sizeof(cache_control), "bytes %llu-%llu/%llu",
2678 rp->start, rp->end, rp->extent);
2680 if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_RANGE,
2681 (unsigned char *)cache_control,
2686 wsi->u.http.range.inside = 0;
2688 if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_ACCEPT_RANGES,
2689 (unsigned char *)"bytes", 5, &p, end))
2693 if (!wsi->sending_chunked) {
2694 if (lws_add_http_header_content_length(wsi,
2695 computed_total_content_length,
2699 if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_TRANSFER_ENCODING,
2700 (unsigned char *)"chunked",
2705 if (wsi->cache_secs && wsi->cache_reuse) {
2706 if (wsi->cache_revalidate) {
2708 cclen = sprintf(cache_control, "%s max-age: %u",
2709 intermediates[wsi->cache_intermediaries],
2717 if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CACHE_CONTROL,
2718 (unsigned char *)cc, cclen, &p, end))
2721 if (wsi->u.http.connection_type == HTTP_CONNECTION_KEEP_ALIVE)
2722 if (lws_add_http_header_by_token(wsi, WSI_TOKEN_CONNECTION,
2723 (unsigned char *)"keep-alive", 10, &p, end))
2726 if (other_headers) {
2727 if ((end - p) < other_headers_len)
2729 memcpy(p, other_headers, other_headers_len);
2730 p += other_headers_len;
2733 if (lws_finalize_http_header(wsi, &p, end))
2736 ret = lws_write(wsi, response, p - response, LWS_WRITE_HTTP_HEADERS);
2737 if (ret != (p - response)) {
2738 lwsl_err("_write returned %d from %ld\n", ret, (long)(p - response));
2742 wsi->u.http.filepos = 0;
2743 wsi->state = LWSS_HTTP_ISSUING_FILE;
2745 return lws_serve_http_file_fragment(wsi);
2749 lws_interpret_incoming_packet(struct lws *wsi, unsigned char **buf, size_t len)
2753 lwsl_parser("%s: received %d byte packet\n", __func__, (int)len);
2755 lwsl_hexdump(*buf, len);
2758 /* let the rx protocol state machine have as much as it needs */
2762 * we were accepting input but now we stopped doing so
2764 if (!(wsi->rxflow_change_to & LWS_RXFLOW_ALLOW)) {
2765 lws_rxflow_cache(wsi, *buf, 0, len);
2766 lwsl_parser("%s: cached %ld\n", __func__, (long)len);
2770 if (wsi->u.ws.rx_draining_ext) {
2771 // lwsl_notice("draining with 0\n");
2772 m = lws_rx_sm(wsi, 0);
2778 /* account for what we're using in rxflow buffer */
2779 if (wsi->rxflow_buffer)
2782 /* consume payload bytes efficiently */
2784 wsi->lws_rx_parse_state ==
2785 LWS_RXPS_PAYLOAD_UNTIL_LENGTH_EXHAUSTED) {
2786 m = lws_payload_until_length_exhausted(wsi, buf, &len);
2787 if (wsi->rxflow_buffer)
2788 wsi->rxflow_pos += m;
2791 /* process the byte */
2792 m = lws_rx_sm(wsi, *(*buf)++);
2798 lwsl_parser("%s: exit with %d unused\n", __func__, (int)len);
2804 lws_server_get_canonical_hostname(struct lws_context *context,
2805 struct lws_context_creation_info *info)
2807 if (lws_check_opt(info->options, LWS_SERVER_OPTION_SKIP_SERVER_CANONICAL_NAME))
2809 #if LWS_POSIX && !defined(LWS_WITH_ESP32)
2810 /* find canonical hostname */
2811 gethostname((char *)context->canonical_hostname,
2812 sizeof(context->canonical_hostname) - 1);
2814 lwsl_notice(" canonical_hostname = %s\n", context->canonical_hostname);
2820 #define LWS_MAX_ELEM_NAME 32
2822 enum urldecode_stateful {
2836 static const char * const mp_hdr[] = {
2837 "content-disposition: ",
2842 typedef int (*lws_urldecode_stateful_cb)(void *data,
2843 const char *name, char **buf, int len, int final);
2845 struct lws_urldecode_stateful {
2848 char name[LWS_MAX_ELEM_NAME];
2849 char temp[LWS_MAX_ELEM_NAME];
2850 char content_type[32];
2851 char content_disp[32];
2852 char content_disp_filename[256];
2853 char mime_boundary[128];
2860 unsigned int multipart_form_data:1;
2861 unsigned int inside_quote:1;
2862 unsigned int subname:1;
2863 unsigned int boundary_real_crlf:1;
2865 enum urldecode_stateful state;
2867 lws_urldecode_stateful_cb output;
2870 static struct lws_urldecode_stateful *
2871 lws_urldecode_s_create(struct lws *wsi, char *out, int out_len, void *data,
2872 lws_urldecode_stateful_cb output)
2874 struct lws_urldecode_stateful *s = lws_zalloc(sizeof(*s));
2882 s->out_len = out_len;
2891 if (lws_hdr_copy(wsi, buf, sizeof(buf), WSI_TOKEN_HTTP_CONTENT_TYPE) > 0) {
2892 /* multipart/form-data; boundary=----WebKitFormBoundarycc7YgAPEIHvgE9Bf */
2894 if (!strncmp(buf, "multipart/form-data", 19)) {
2895 s->multipart_form_data = 1;
2896 s->state = MT_LOOK_BOUND_IN;
2898 p = strstr(buf, "boundary=");
2901 s->mime_boundary[m++] = '\x0d';
2902 s->mime_boundary[m++] = '\x0a';
2903 s->mime_boundary[m++] = '-';
2904 s->mime_boundary[m++] = '-';
2905 while (m < sizeof(s->mime_boundary) - 1 &&
2907 s->mime_boundary[m++] = *p++;
2909 s->mime_boundary[m] = '\0';
2911 lwsl_notice("boundary '%s'\n", s->mime_boundary);
2920 lws_urldecode_s_process(struct lws_urldecode_stateful *s, const char *in, int len)
2923 char c, was_end = 0;
2926 if (s->pos == s->out_len - s->mp - 1) {
2927 if (s->output(s->data, s->name, &s->out, s->pos, 0))
2935 /* states for url arg style */
2938 s->inside_quote = 0;
2940 s->name[s->pos] = '\0';
2947 s->name[s->pos] = '\0';
2948 if (s->output(s->data, s->name, &s->out, s->pos, 1))
2955 if (s->pos >= sizeof(s->name) - 1) {
2956 lwsl_notice("Name too long\n");
2959 s->name[s->pos++] = *in++;
2968 s->out[s->pos] = '\0';
2969 if (s->output(s->data, s->name, &s->out, s->pos, 1))
2978 s->out[s->pos++] = ' ';
2981 s->out[s->pos++] = *in++;
2984 n = char_to_hex(*in);
2994 n = char_to_hex(*in);
2999 s->out[s->pos++] = s->sum | n;
3004 /* states for multipart / mime style */
3006 case MT_LOOK_BOUND_IN:
3008 if (*in == s->mime_boundary[s->mp] &&
3009 s->mime_boundary[s->mp]) {
3012 if (!s->mime_boundary[s->mp]) {
3014 s->state = MT_IGNORE1;
3016 if (s->pos || was_end)
3017 if (s->output(s->data, s->name,
3018 &s->out, s->pos, 1))
3023 s->content_disp[0] = '\0';
3025 s->content_disp_filename[0] = '\0';
3026 s->boundary_real_crlf = 1;
3032 if (!s->boundary_real_crlf)
3035 memcpy(s->out + s->pos, s->mime_boundary + n, s->mp - n);
3038 goto retry_as_first;
3041 s->out[s->pos++] = *in;
3049 if (c >= 'A' && c <= 'Z')
3051 for (n = 0; n < ARRAY_SIZE(mp_hdr); n++)
3052 if (c == mp_hdr[n][s->mp]) {
3066 if (mp_hdr[hit][s->mp])
3074 s->state = MT_LOOK_BOUND_IN;
3076 s->state += hit + 1;
3080 /* form-data; name="file"; filename="t.txt" */
3082 if (*in == '\x0d') {
3083 // lwsl_notice("disp: '%s', '%s', '%s'\n",
3084 // s->content_disp, s->name,
3085 // s->content_disp_filename);
3087 if (s->content_disp_filename[0])
3088 if (s->output(s->data, s->name,
3089 &s->out, s->pos, LWS_UFS_OPEN))
3091 s->state = MT_IGNORE2;
3102 s->inside_quote ^= 1;
3108 s->temp[s->mp] = '\0';
3113 if (s->mp < sizeof(s->temp) - 1 &&
3114 (*in != ' ' || s->inside_quote))
3115 s->temp[s->mp++] = *in;
3120 if (s->mp < sizeof(s->content_disp) - 1)
3121 s->content_disp[s->mp++] = *in;
3122 s->content_disp[s->mp] = '\0';
3126 if (!strcmp(s->temp, "name")) {
3127 if (s->mp < sizeof(s->name) - 1)
3128 s->name[s->mp++] = *in;
3129 s->name[s->mp] = '\0';
3133 if (!strcmp(s->temp, "filename")) {
3134 if (s->mp < sizeof(s->content_disp_filename) - 1)
3135 s->content_disp_filename[s->mp++] = *in;
3136 s->content_disp_filename[s->mp] = '\0';
3145 s->state = MT_IGNORE2;
3147 if (s->mp < sizeof(s->content_type) - 1)
3148 s->content_type[s->mp++] = *in;
3149 s->content_type[s->mp] = '\0';
3156 s->state = MT_IGNORE2;
3163 s->state = MT_HNAME;
3173 lws_urldecode_s_destroy(struct lws_urldecode_stateful *s)
3177 if (s->state != US_IDLE)
3181 if (s->output(s->data, s->name, &s->out, s->pos, 1))
3190 struct lws_urldecode_stateful *s;
3191 lws_spa_fileupload_cb opt_cb;
3192 const char * const *param_names;
3206 lws_urldecode_spa_lookup(struct lws_spa *spa,
3211 for (n = 0; n < spa->count_params; n++)
3212 if (!strcmp(spa->param_names[n], name))
3219 lws_urldecode_spa_cb(void *data, const char *name, char **buf, int len,
3222 struct lws_spa *spa =
3223 (struct lws_spa *)data;
3226 if (spa->s->content_disp_filename[0]) {
3228 n = spa->opt_cb(spa->opt_data, name,
3229 spa->s->content_disp_filename,
3237 n = lws_urldecode_spa_lookup(spa, name);
3239 if (n == -1 || !len) /* unrecognized */
3242 if (!spa->params[n])
3243 spa->params[n] = *buf;
3245 if ((*buf) + len >= spa->end) {
3246 lwsl_notice("%s: exceeded storage\n", __func__);
3250 spa->param_length[n] += len;
3252 /* move it on inside storage */
3256 spa->s->out_len -= len + 1;
3261 LWS_VISIBLE LWS_EXTERN struct lws_spa *
3262 lws_spa_create(struct lws *wsi, const char * const *param_names,
3263 int count_params, int max_storage,
3264 lws_spa_fileupload_cb opt_cb, void *opt_data)
3266 struct lws_spa *spa = lws_zalloc(sizeof(*spa));
3271 spa->param_names = param_names;
3272 spa->count_params = count_params;
3273 spa->max_storage = max_storage;
3274 spa->opt_cb = opt_cb;
3275 spa->opt_data = opt_data;
3277 spa->storage = lws_malloc(max_storage);
3280 spa->end = spa->storage + max_storage - 1;
3282 spa->params = lws_zalloc(sizeof(char *) * count_params);
3286 spa->s = lws_urldecode_s_create(wsi, spa->storage, max_storage, spa,
3287 lws_urldecode_spa_cb);
3291 spa->param_length = lws_zalloc(sizeof(int) * count_params);
3292 if (!spa->param_length)
3295 lwsl_info("%s: Created SPA %p\n", __func__, spa);
3300 lws_urldecode_s_destroy(spa->s);
3302 lws_free(spa->params);
3304 lws_free(spa->storage);
3311 LWS_VISIBLE LWS_EXTERN int
3312 lws_spa_process(struct lws_spa *ludspa, const char *in, int len)
3315 lwsl_err("%s: NULL spa\n", __func__);
3318 /* we reject any junk after the last part arrived and we finalized */
3319 if (ludspa->finalized)
3322 return lws_urldecode_s_process(ludspa->s, in, len);
3325 LWS_VISIBLE LWS_EXTERN int
3326 lws_spa_get_length(struct lws_spa *ludspa, int n)
3328 if (n >= ludspa->count_params)
3331 return ludspa->param_length[n];
3334 LWS_VISIBLE LWS_EXTERN const char *
3335 lws_spa_get_string(struct lws_spa *ludspa, int n)
3337 if (n >= ludspa->count_params)
3340 return ludspa->params[n];
3343 LWS_VISIBLE LWS_EXTERN int
3344 lws_spa_finalize(struct lws_spa *spa)
3347 lws_urldecode_s_destroy(spa->s);
3356 LWS_VISIBLE LWS_EXTERN int
3357 lws_spa_destroy(struct lws_spa *spa)
3361 lwsl_notice("%s: destroy spa %p\n", __func__, spa);
3364 lws_urldecode_s_destroy(spa->s);
3366 lwsl_debug("%s %p %p %p %p\n", __func__,
3373 lws_free(spa->param_length);
3374 lws_free(spa->params);
3375 lws_free(spa->storage);
3382 LWS_VISIBLE LWS_EXTERN int
3383 lws_spa_destroy(struct lws_spa *spa)
3387 lwsl_info("%s: destroy spa %p\n", __func__, spa);
3390 lws_urldecode_s_destroy(spa->s);
3392 lwsl_debug("%s\n", __func__);
3394 lws_free(spa->param_length);
3395 lws_free(spa->params);
3396 lws_free(spa->storage);
3402 LWS_VISIBLE LWS_EXTERN int
3403 lws_chunked_html_process(struct lws_process_html_args *args,
3404 struct lws_process_html_state *s)
3406 char *sp, buffer[32];
3410 /* do replacements */
3412 old_len = args->len;
3415 while (sp < args->p + old_len) {
3417 if (args->len + 7 >= args->max_len) {
3418 lwsl_err("Used up interpret padding\n");
3422 if ((!s->pos && *sp == '$') || s->pos) {
3423 int hits = 0, hit = 0;
3427 s->swallow[s->pos++] = *sp;
3428 if (s->pos == sizeof(s->swallow) - 1)
3430 for (n = 0; n < s->count_vars; n++)
3431 if (!strncmp(s->swallow, s->vars[n], s->pos)) {
3437 s->swallow[s->pos] = '\0';
3438 memcpy(s->start, s->swallow, s->pos);
3444 if (hits == 1 && s->pos == strlen(s->vars[hit])) {
3445 pc = s->replace(s->data, hit);
3449 s->swallow[s->pos] = '\0';
3451 memmove(s->start + n,
3453 old_len - (sp - args->p));
3454 old_len += (n - s->pos) + 1;
3456 memcpy(s->start, pc, n);
3470 /* no space left for final chunk trailer */
3471 if (args->final && args->len + 7 >= args->max_len)
3474 n = sprintf(buffer, "%X\x0d\x0a", args->len);
3477 memcpy(args->p, buffer, n);
3481 sp = args->p + args->len;
3491 sp = args->p + args->len;