diff options
Diffstat (limited to 'thirdparty/lws/server/server.c')
| -rw-r--r-- | thirdparty/lws/server/server.c | 3025 |
1 files changed, 0 insertions, 3025 deletions
diff --git a/thirdparty/lws/server/server.c b/thirdparty/lws/server/server.c deleted file mode 100644 index db05954257..0000000000 --- a/thirdparty/lws/server/server.c +++ /dev/null @@ -1,3025 +0,0 @@ -/* - * libwebsockets - small server side websockets and web server implementation - * - * Copyright (C) 2010-2017 Andy Green <andy@warmcat.com> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation: - * version 2.1 of the License. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, - * MA 02110-1301 USA - */ - -#include "private-libwebsockets.h" - -const char * const method_names[] = { - "GET", "POST", "OPTIONS", "PUT", "PATCH", "DELETE", "CONNECT", "HEAD", -#ifdef LWS_WITH_HTTP2 - ":path", -#endif - }; - -#if defined (LWS_WITH_ESP8266) -#undef memcpy -void *memcpy(void *dest, const void *src, size_t n) -{ - return ets_memcpy(dest, src, n); -} -#endif - -int -lws_context_init_server(struct lws_context_creation_info *info, - struct lws_vhost *vhost) -{ -#if LWS_POSIX - int n, opt = 1, limit = 1; -#endif - lws_sockfd_type sockfd; - struct lws_vhost *vh; - struct lws *wsi; - int m = 0; - - (void)method_names; - (void)opt; - /* set up our external listening socket we serve on */ - - if (info->port == CONTEXT_PORT_NO_LISTEN || - info->port == CONTEXT_PORT_NO_LISTEN_SERVER) - return 0; - - vh = vhost->context->vhost_list; - while (vh) { - if (vh->listen_port == info->port) { - if ((!info->iface && !vh->iface) || - (info->iface && vh->iface && - !strcmp(info->iface, vh->iface))) { - vhost->listen_port = info->port; - vhost->iface = info->iface; - lwsl_notice(" using listen skt from vhost %s\n", - vh->name); - return 0; - } - } - vh = vh->vhost_next; - } - -#if LWS_POSIX - (void)n; -#if defined(__linux__) - limit = vhost->context->count_threads; -#endif - - for (m = 0; m < limit; m++) { -#ifdef LWS_WITH_UNIX_SOCK - if (LWS_UNIX_SOCK_ENABLED(vhost)) - sockfd = socket(AF_UNIX, SOCK_STREAM, 0); - else -#endif -#ifdef LWS_WITH_IPV6 - if (LWS_IPV6_ENABLED(vhost)) - sockfd = socket(AF_INET6, SOCK_STREAM, 0); - else -#endif - sockfd = socket(AF_INET, SOCK_STREAM, 0); - - if (sockfd == -1) { -#else -#if defined(LWS_WITH_ESP8266) - sockfd = esp8266_create_tcp_listen_socket(vhost); - if (!lws_sockfd_valid(sockfd)) { -#endif -#endif - lwsl_err("ERROR opening socket\n"); - return 1; - } -#if LWS_POSIX && !defined(LWS_WITH_ESP32) - -#if (defined(WIN32) || defined(_WIN32)) && defined(SO_EXCLUSIVEADDRUSE) - /* - * only accept that we are the only listener on the port - * https://msdn.microsoft.com/zh-tw/library/ - * windows/desktop/ms740621(v=vs.85).aspx - * - * for lws, to match Linux, we default to exclusive listen - */ - if (!lws_check_opt(vhost->options, - LWS_SERVER_OPTION_ALLOW_LISTEN_SHARE)) { - if (setsockopt(sockfd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, - (const void *)&opt, sizeof(opt)) < 0) { - lwsl_err("reuseaddr failed\n"); - compatible_close(sockfd); - return 1; - } - } else -#endif - - /* - * allow us to restart even if old sockets in TIME_WAIT - */ - if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, - (const void *)&opt, sizeof(opt)) < 0) { - lwsl_err("reuseaddr failed\n"); - compatible_close(sockfd); - return 1; - } - -#if defined(LWS_WITH_IPV6) && defined(IPV6_V6ONLY) - if (LWS_IPV6_ENABLED(vhost)) { - if (vhost->options & LWS_SERVER_OPTION_IPV6_V6ONLY_MODIFY) { - int value = (vhost->options & - LWS_SERVER_OPTION_IPV6_V6ONLY_VALUE) ? 1 : 0; - if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, - (const void*)&value, sizeof(value)) < 0) { - compatible_close(sockfd); - return 1; - } - } - } -#endif - -#if defined(__linux__) && defined(SO_REUSEPORT) - n = lws_check_opt(vhost->options, LWS_SERVER_OPTION_ALLOW_LISTEN_SHARE); -#if LWS_MAX_SMP > 1 - n = 1; -#endif - - if (n) - if (vhost->context->count_threads > 1) - if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEPORT, - (const void *)&opt, sizeof(opt)) < 0) { - compatible_close(sockfd); - return 1; - } -#endif -#endif - lws_plat_set_socket_options(vhost, sockfd); - -#if LWS_POSIX - n = lws_socket_bind(vhost, sockfd, info->port, info->iface); - if (n < 0) - goto bail; - info->port = n; -#endif - vhost->listen_port = info->port; - vhost->iface = info->iface; - - wsi = lws_zalloc(sizeof(struct lws), "listen wsi"); - if (wsi == NULL) { - lwsl_err("Out of mem\n"); - goto bail; - } - wsi->context = vhost->context; - wsi->desc.sockfd = sockfd; - wsi->mode = LWSCM_SERVER_LISTENER; - wsi->protocol = vhost->protocols; - wsi->tsi = m; - wsi->vhost = vhost; - wsi->listener = 1; - -#ifdef LWS_WITH_LIBUV - if (LWS_LIBUV_ENABLED(vhost->context)) - lws_uv_initvhost(vhost, wsi); -#endif - - if (insert_wsi_socket_into_fds(vhost->context, wsi)) - goto bail; - - vhost->context->count_wsi_allocated++; - vhost->lserv_wsi = wsi; - -#if LWS_POSIX - n = listen(wsi->desc.sockfd, LWS_SOMAXCONN); - if (n < 0) { - lwsl_err("listen failed with error %d\n", LWS_ERRNO); - vhost->lserv_wsi = NULL; - vhost->context->count_wsi_allocated--; - remove_wsi_socket_from_fds(wsi); - goto bail; - } - } /* for each thread able to independently listen */ -#else -#if defined(LWS_WITH_ESP8266) - esp8266_tcp_stream_bind(wsi->desc.sockfd, info->port, wsi); -#endif -#endif - if (!lws_check_opt(info->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS)) { -#ifdef LWS_WITH_UNIX_SOCK - if (LWS_UNIX_SOCK_ENABLED(vhost)) - lwsl_info(" Listening on \"%s\"\n", info->iface); - else -#endif - lwsl_info(" Listening on port %d\n", info->port); - } - - return 0; - -bail: - compatible_close(sockfd); - - return 1; -} - -#if defined(LWS_WITH_ESP8266) -#undef strchr -#define strchr ets_strchr -#endif - -struct lws_vhost * -lws_select_vhost(struct lws_context *context, int port, const char *servername) -{ - struct lws_vhost *vhost = context->vhost_list; - const char *p; - int n, m, colon; - - n = strlen(servername); - colon = n; - p = strchr(servername, ':'); - if (p) - colon = p - servername; - - /* Priotity 1: first try exact matches */ - - while (vhost) { - if (port == vhost->listen_port && - !strncmp(vhost->name, servername, colon)) { - lwsl_info("SNI: Found: %s\n", servername); - return vhost; - } - vhost = vhost->vhost_next; - } - - /* - * Priority 2: if no exact matches, try matching *.vhost-name - * unintentional matches are possible but resolve to x.com for *.x.com - * which is reasonable. If exact match exists we already chose it and - * never reach here. SSL will still fail it if the cert doesn't allow - * *.x.com. - */ - vhost = context->vhost_list; - while (vhost) { - m = strlen(vhost->name); - if (port == vhost->listen_port && - m <= (colon - 2) && - servername[colon - m - 1] == '.' && - !strncmp(vhost->name, servername + colon - m, m)) { - lwsl_info("SNI: Found %s on wildcard: %s\n", - servername, vhost->name); - return vhost; - } - vhost = vhost->vhost_next; - } - - /* Priority 3: match the first vhost on our port */ - - vhost = context->vhost_list; - while (vhost) { - if (port == vhost->listen_port) { - lwsl_info("vhost match to %s based on port %d\n", - vhost->name, port); - return vhost; - } - vhost = vhost->vhost_next; - } - - /* no match */ - - return NULL; -} - -LWS_VISIBLE LWS_EXTERN const char * -lws_get_mimetype(const char *file, const struct lws_http_mount *m) -{ - int n = strlen(file); - const struct lws_protocol_vhost_options *pvo = NULL; - - if (m) - pvo = m->extra_mimetypes; - - if (n < 5) - return NULL; - - if (!strcmp(&file[n - 4], ".ico")) - return "image/x-icon"; - - if (!strcmp(&file[n - 4], ".gif")) - return "image/gif"; - - if (!strcmp(&file[n - 3], ".js")) - return "text/javascript"; - - if (!strcmp(&file[n - 4], ".png")) - return "image/png"; - - if (!strcmp(&file[n - 4], ".jpg")) - return "image/jpeg"; - - if (!strcmp(&file[n - 3], ".gz")) - return "application/gzip"; - - if (!strcmp(&file[n - 4], ".JPG")) - return "image/jpeg"; - - if (!strcmp(&file[n - 5], ".html")) - return "text/html"; - - if (!strcmp(&file[n - 4], ".css")) - return "text/css"; - - if (!strcmp(&file[n - 4], ".txt")) - return "text/plain"; - - if (!strcmp(&file[n - 4], ".svg")) - return "image/svg+xml"; - - if (!strcmp(&file[n - 4], ".ttf")) - return "application/x-font-ttf"; - - if (!strcmp(&file[n - 4], ".otf")) - return "application/font-woff"; - - if (!strcmp(&file[n - 5], ".woff")) - return "application/font-woff"; - - if (!strcmp(&file[n - 4], ".xml")) - return "application/xml"; - - while (pvo) { - if (pvo->name[0] == '*') /* ie, match anything */ - return pvo->value; - - if (!strcmp(&file[n - strlen(pvo->name)], pvo->name)) - return pvo->value; - - pvo = pvo->next; - } - - return NULL; -} -static lws_fop_flags_t -lws_vfs_prepare_flags(struct lws *wsi) -{ - lws_fop_flags_t f = 0; - - if (!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_ACCEPT_ENCODING)) - return f; - - if (strstr(lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_ACCEPT_ENCODING), - "gzip")) { - lwsl_info("client indicates GZIP is acceptable\n"); - f |= LWS_FOP_FLAG_COMPR_ACCEPTABLE_GZIP; - } - - return f; -} - -static int -lws_http_serve(struct lws *wsi, char *uri, const char *origin, - const struct lws_http_mount *m) -{ - const struct lws_protocol_vhost_options *pvo = m->interpret; - struct lws_process_html_args args; - const char *mimetype; -#if !defined(_WIN32_WCE) && !defined(LWS_WITH_ESP8266) - const struct lws_plat_file_ops *fops; - const char *vpath; - lws_fop_flags_t fflags = LWS_O_RDONLY; -#if defined(WIN32) && defined(LWS_HAVE__STAT32I64) - struct _stat32i64 st; -#else - struct stat st; -#endif - int spin = 0; -#endif - char path[256], sym[512]; - unsigned char *p = (unsigned char *)sym + 32 + LWS_PRE, *start = p; - unsigned char *end = p + sizeof(sym) - 32 - LWS_PRE; -#if !defined(WIN32) && LWS_POSIX && !defined(LWS_WITH_ESP32) - size_t len; -#endif - int n; - - lws_snprintf(path, sizeof(path) - 1, "%s/%s", origin, uri); - -#if !defined(_WIN32_WCE) && !defined(LWS_WITH_ESP8266) - - fflags |= lws_vfs_prepare_flags(wsi); - - do { - spin++; - fops = lws_vfs_select_fops(wsi->context->fops, path, &vpath); - - if (wsi->u.http.fop_fd) - lws_vfs_file_close(&wsi->u.http.fop_fd); - - wsi->u.http.fop_fd = fops->LWS_FOP_OPEN(wsi->context->fops, - path, vpath, &fflags); - if (!wsi->u.http.fop_fd) { - lwsl_err("Unable to open '%s'\n", path); - - return -1; - } - - /* if it can't be statted, don't try */ - if (fflags & LWS_FOP_FLAG_VIRTUAL) - break; -#if defined(LWS_WITH_ESP32) - break; -#endif -#if !defined(WIN32) - if (fstat(wsi->u.http.fop_fd->fd, &st)) { - lwsl_info("unable to stat %s\n", path); - goto bail; - } -#else -#if defined(LWS_HAVE__STAT32I64) - if (_stat32i64(path, &st)) { - lwsl_info("unable to stat %s\n", path); - goto bail; - } -#else - if (stat(path, &st)) { - lwsl_info("unable to stat %s\n", path); - goto bail; - } -#endif -#endif - - wsi->u.http.fop_fd->mod_time = (uint32_t)st.st_mtime; - fflags |= LWS_FOP_FLAG_MOD_TIME_VALID; - -#if !defined(WIN32) && LWS_POSIX && !defined(LWS_WITH_ESP32) - if ((S_IFMT & st.st_mode) == S_IFLNK) { - len = readlink(path, sym, sizeof(sym) - 1); - if (len) { - lwsl_err("Failed to read link %s\n", path); - goto bail; - } - sym[len] = '\0'; - lwsl_debug("symlink %s -> %s\n", path, sym); - lws_snprintf(path, sizeof(path) - 1, "%s", sym); - } -#endif - if ((S_IFMT & st.st_mode) == S_IFDIR) { - lwsl_debug("default filename append to dir\n"); - lws_snprintf(path, sizeof(path) - 1, "%s/%s/index.html", - origin, uri); - } - - } while ((S_IFMT & st.st_mode) != S_IFREG && spin < 5); - - if (spin == 5) - lwsl_err("symlink loop %s \n", path); - - n = sprintf(sym, "%08llX%08lX", - (unsigned long long)lws_vfs_get_length(wsi->u.http.fop_fd), - (unsigned long)lws_vfs_get_mod_time(wsi->u.http.fop_fd)); - - /* disable ranges if IF_RANGE token invalid */ - - if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_IF_RANGE)) - if (strcmp(sym, lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_IF_RANGE))) - /* differs - defeat Range: */ - wsi->u.http.ah->frag_index[WSI_TOKEN_HTTP_RANGE] = 0; - - if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_IF_NONE_MATCH)) { - /* - * he thinks he has some version of it already, - * check if the tag matches - */ - if (!strcmp(sym, lws_hdr_simple_ptr(wsi, - WSI_TOKEN_HTTP_IF_NONE_MATCH))) { - - lwsl_debug("%s: ETAG match %s %s\n", __func__, - uri, origin); - - /* we don't need to send the payload */ - if (lws_add_http_header_status(wsi, - HTTP_STATUS_NOT_MODIFIED, &p, end)) - return -1; - - if (lws_add_http_header_by_token(wsi, - WSI_TOKEN_HTTP_ETAG, - (unsigned char *)sym, n, &p, end)) - return -1; - - if (lws_finalize_http_header(wsi, &p, end)) - return -1; - - n = lws_write(wsi, start, p - start, - LWS_WRITE_HTTP_HEADERS | - LWS_WRITE_H2_STREAM_END); - if (n != (p - start)) { - lwsl_err("_write returned %d from %ld\n", n, - (long)(p - start)); - return -1; - } - - lws_vfs_file_close(&wsi->u.http.fop_fd); - - return lws_http_transaction_completed(wsi); - } - } - - if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_ETAG, - (unsigned char *)sym, n, &p, end)) - return -1; -#endif - - mimetype = lws_get_mimetype(path, m); - if (!mimetype) { - lwsl_err("unknown mimetype for %s\n", path); - goto bail; - } - if (!mimetype[0]) - lwsl_debug("sending no mimetype for %s\n", path); - - wsi->sending_chunked = 0; - - /* - * check if this is in the list of file suffixes to be interpreted by - * a protocol - */ - while (pvo) { - n = strlen(path); - if (n > (int)strlen(pvo->name) && - !strcmp(&path[n - strlen(pvo->name)], pvo->name)) { - wsi->sending_chunked = 1; - wsi->protocol_interpret_idx = - (char)(lws_intptr_t)pvo->value; - lwsl_info("want %s interpreted by %s\n", path, - wsi->vhost->protocols[ - (int)(lws_intptr_t)(pvo->value)].name); - wsi->protocol = &wsi->vhost->protocols[ - (int)(lws_intptr_t)(pvo->value)]; - if (lws_ensure_user_space(wsi)) - return -1; - break; - } - pvo = pvo->next; - } - - if (m->protocol) { - const struct lws_protocols *pp = lws_vhost_name_to_protocol( - wsi->vhost, m->protocol); - - if (lws_bind_protocol(wsi, pp)) - return 1; - args.p = (char *)p; - args.max_len = end - p; - if (pp->callback(wsi, LWS_CALLBACK_ADD_HEADERS, - wsi->user_space, &args, 0)) - return -1; - p = (unsigned char *)args.p; - } - - n = lws_serve_http_file(wsi, path, mimetype, (char *)start, p - start); - - if (n < 0 || ((n > 0) && lws_http_transaction_completed(wsi))) - return -1; /* error or can't reuse connection: close the socket */ - - return 0; -bail: - - return -1; -} - -const struct lws_http_mount * -lws_find_mount(struct lws *wsi, const char *uri_ptr, int uri_len) -{ - const struct lws_http_mount *hm, *hit = NULL; - int best = 0; - - hm = wsi->vhost->mount_list; - while (hm) { - if (uri_len >= hm->mountpoint_len && - !strncmp(uri_ptr, hm->mountpoint, hm->mountpoint_len) && - (uri_ptr[hm->mountpoint_len] == '\0' || - uri_ptr[hm->mountpoint_len] == '/' || - hm->mountpoint_len == 1) - ) { - if (hm->origin_protocol == LWSMPRO_CALLBACK || - ((hm->origin_protocol == LWSMPRO_CGI || - lws_hdr_total_length(wsi, WSI_TOKEN_GET_URI) || - (wsi->http2_substream && - lws_hdr_total_length(wsi, - WSI_TOKEN_HTTP_COLON_PATH)) || - hm->protocol) && - hm->mountpoint_len > best)) { - best = hm->mountpoint_len; - hit = hm; - } - } - hm = hm->mount_next; - } - - return hit; -} - -#if LWS_POSIX - -static int -lws_find_string_in_file(const char *filename, const char *string, int stringlen) -{ - char buf[128]; - int fd, match = 0, pos = 0, n = 0, hit = 0; - - fd = open(filename, O_RDONLY); - if (fd < 0) { - lwsl_err("can't open auth file: %s\n", filename); - return 1; - } - - while (1) { - if (pos == n) { - n = read(fd, buf, sizeof(buf)); - if (n <= 0) { - if (match == stringlen) - hit = 1; - break; - } - pos = 0; - } - - if (match == stringlen) { - if (buf[pos] == '\r' || buf[pos] == '\n') { - hit = 1; - break; - } - match = 0; - } - - if (buf[pos] == string[match]) - match++; - else - match = 0; - - pos++; - } - - close(fd); - - return hit; -} - -static int -lws_unauthorised_basic_auth(struct lws *wsi) -{ - struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi]; - unsigned char *start = pt->serv_buf + LWS_PRE, - *p = start, *end = p + 512; - char buf[64]; - int n; - - /* no auth... tell him it is required */ - - if (lws_add_http_header_status(wsi, HTTP_STATUS_UNAUTHORIZED, &p, end)) - return -1; - - n = lws_snprintf(buf, sizeof(buf), "Basic realm=\"lwsws\""); - if (lws_add_http_header_by_token(wsi, - WSI_TOKEN_HTTP_WWW_AUTHENTICATE, - (unsigned char *)buf, n, &p, end)) - return -1; - - if (lws_finalize_http_header(wsi, &p, end)) - return -1; - - n = lws_write(wsi, start, p - start, LWS_WRITE_HTTP_HEADERS | - LWS_WRITE_H2_STREAM_END); - if (n < 0) - return -1; - - return lws_http_transaction_completed(wsi); - -} - -#endif - -int lws_clean_url(char *p) -{ - if (p[0] == 'h' && p[1] == 't' && p[2] == 't' && p[3] == 'p') { - p += 4; - if (*p == 's') - p++; - if (*p == ':') { - p++; - if (*p == '/') - p++; - } - } - - while (*p) { - if (p[0] == '/' && p[1] == '/') { - char *p1 = p; - while (*p1) { - *p1 = p1[1]; - p1++; - } - continue; - } - p++; - } - - return 0; -} - - -static const unsigned char methods[] = { - WSI_TOKEN_GET_URI, - WSI_TOKEN_POST_URI, - WSI_TOKEN_OPTIONS_URI, - WSI_TOKEN_PUT_URI, - WSI_TOKEN_PATCH_URI, - WSI_TOKEN_DELETE_URI, - WSI_TOKEN_CONNECT, - WSI_TOKEN_HEAD_URI, -#ifdef LWS_WITH_HTTP2 - WSI_TOKEN_HTTP_COLON_PATH, -#endif -}; - -static int -lws_http_get_uri_and_method(struct lws *wsi, char **puri_ptr, int *puri_len) -{ - int n, count = 0; - - for (n = 0; n < ARRAY_SIZE(methods); n++) - if (lws_hdr_total_length(wsi, methods[n])) - count++; - if (!count) { - lwsl_warn("Missing URI in HTTP request\n"); - return -1; - } - - if (count != 1 && - !(wsi->http2_substream && - lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_COLON_PATH))) { - lwsl_warn("multiple methods?\n"); - return -1; - } - - for (n = 0; n < ARRAY_SIZE(methods); n++) - if (lws_hdr_total_length(wsi, methods[n])) { - *puri_ptr = lws_hdr_simple_ptr(wsi, methods[n]); - *puri_len = lws_hdr_total_length(wsi, methods[n]); - return n; - } - - return -1; -} - -int -lws_http_action(struct lws *wsi) -{ - struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi]; - enum http_connection_type connection_type; - enum http_version request_version; - char content_length_str[32]; - struct lws_process_html_args args; - const struct lws_http_mount *hit = NULL; - unsigned int n; - char http_version_str[10]; - char http_conn_str[20]; - int http_version_len; - char *uri_ptr = NULL, *s; - int uri_len = 0, meth; - static const char * const oprot[] = { - "http://", "https://" - }; - - meth = lws_http_get_uri_and_method(wsi, &uri_ptr, &uri_len); - if (meth < 0 || meth >= ARRAY_SIZE(method_names)) - goto bail_nuke_ah; - - /* we insist on absolute paths */ - - if (!uri_ptr || uri_ptr[0] != '/') { - lws_return_http_status(wsi, HTTP_STATUS_FORBIDDEN, NULL); - - goto bail_nuke_ah; - } - - lwsl_info("Method: '%s' (%d), request for '%s'\n", method_names[meth], - meth, uri_ptr); - - if (lws_ensure_user_space(wsi)) - goto bail_nuke_ah; - - /* HTTP header had a content length? */ - - wsi->u.http.rx_content_length = 0; - if (lws_hdr_total_length(wsi, WSI_TOKEN_POST_URI) || - lws_hdr_total_length(wsi, WSI_TOKEN_PATCH_URI) || - lws_hdr_total_length(wsi, WSI_TOKEN_PUT_URI)) - wsi->u.http.rx_content_length = 100 * 1024 * 1024; - - if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_CONTENT_LENGTH)) { - lws_hdr_copy(wsi, content_length_str, - sizeof(content_length_str) - 1, - WSI_TOKEN_HTTP_CONTENT_LENGTH); - wsi->u.http.rx_content_length = atoll(content_length_str); - } - - if (wsi->http2_substream) { - wsi->u.http.request_version = HTTP_VERSION_2; - } else { - /* http_version? Default to 1.0, override with token: */ - request_version = HTTP_VERSION_1_0; - - /* Works for single digit HTTP versions. : */ - http_version_len = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP); - if (http_version_len > 7) { - lws_hdr_copy(wsi, http_version_str, - sizeof(http_version_str) - 1, - WSI_TOKEN_HTTP); - if (http_version_str[5] == '1' && - http_version_str[7] == '1') - request_version = HTTP_VERSION_1_1; - } - wsi->u.http.request_version = request_version; - - /* HTTP/1.1 defaults to "keep-alive", 1.0 to "close" */ - if (request_version == HTTP_VERSION_1_1) - connection_type = HTTP_CONNECTION_KEEP_ALIVE; - else - connection_type = HTTP_CONNECTION_CLOSE; - - /* Override default if http "Connection:" header: */ - if (lws_hdr_total_length(wsi, WSI_TOKEN_CONNECTION)) { - lws_hdr_copy(wsi, http_conn_str, - sizeof(http_conn_str) - 1, - WSI_TOKEN_CONNECTION); - http_conn_str[sizeof(http_conn_str) - 1] = '\0'; - if (!strcasecmp(http_conn_str, "keep-alive")) - connection_type = HTTP_CONNECTION_KEEP_ALIVE; - else - if (!strcasecmp(http_conn_str, "close")) - connection_type = HTTP_CONNECTION_CLOSE; - } - wsi->u.http.connection_type = connection_type; - } - - n = wsi->protocol->callback(wsi, LWS_CALLBACK_FILTER_HTTP_CONNECTION, - wsi->user_space, uri_ptr, uri_len); - if (n) { - lwsl_info("LWS_CALLBACK_HTTP closing\n"); - - return 1; - } - /* - * if there is content supposed to be coming, - * put a timeout on it having arrived - */ - lws_set_timeout(wsi, PENDING_TIMEOUT_HTTP_CONTENT, - wsi->context->timeout_secs); -#ifdef LWS_OPENSSL_SUPPORT - if (wsi->redirect_to_https) { - /* - * we accepted http:// only so we could redirect to - * https://, so issue the redirect. Create the redirection - * URI from the host: header and ignore the path part - */ - unsigned char *start = pt->serv_buf + LWS_PRE, *p = start, - *end = p + 512; - - if (!lws_hdr_total_length(wsi, WSI_TOKEN_HOST)) - goto bail_nuke_ah; - - n = sprintf((char *)end, "https://%s/", - lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST)); - - n = lws_http_redirect(wsi, HTTP_STATUS_MOVED_PERMANENTLY, - end, n, &p, end); - if ((int)n < 0) - goto bail_nuke_ah; - - return lws_http_transaction_completed(wsi); - } -#endif - -#ifdef LWS_WITH_ACCESS_LOG - lws_prepare_access_log_info(wsi, uri_ptr, meth); -#endif - - /* can we serve it from the mount list? */ - - hit = lws_find_mount(wsi, uri_ptr, uri_len); - if (!hit) { - /* deferred cleanup and reset to protocols[0] */ - - lwsl_info("no hit\n"); - - if (lws_bind_protocol(wsi, &wsi->vhost->protocols[0])) - return 1; - - n = wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP, - wsi->user_space, uri_ptr, uri_len); - - goto after; - } - - s = uri_ptr + hit->mountpoint_len; - - /* - * if we have a mountpoint like https://xxx.com/yyy - * there is an implied / at the end for our purposes since - * we can only mount on a "directory". - * - * But if we just go with that, the browser cannot understand - * that he is actually looking down one "directory level", so - * even though we give him /yyy/abc.html he acts like the - * current directory level is /. So relative urls like "x.png" - * wrongly look outside the mountpoint. - * - * Therefore if we didn't come in on a url with an explicit - * / at the end, we must redirect to add it so the browser - * understands he is one "directory level" down. - */ - if ((hit->mountpoint_len > 1 || - (hit->origin_protocol == LWSMPRO_REDIR_HTTP || - hit->origin_protocol == LWSMPRO_REDIR_HTTPS)) && - (*s != '/' || - (hit->origin_protocol == LWSMPRO_REDIR_HTTP || - hit->origin_protocol == LWSMPRO_REDIR_HTTPS)) && - (hit->origin_protocol != LWSMPRO_CGI && - hit->origin_protocol != LWSMPRO_CALLBACK)) { - unsigned char *start = pt->serv_buf + LWS_PRE, - *p = start, *end = p + 512; - - lwsl_debug("Doing 301 '%s' org %s\n", s, hit->origin); - - /* > at start indicates deal with by redirect */ - if (hit->origin_protocol == LWSMPRO_REDIR_HTTP || - hit->origin_protocol == LWSMPRO_REDIR_HTTPS) - n = lws_snprintf((char *)end, 256, "%s%s", - oprot[hit->origin_protocol & 1], - hit->origin); - else { - if (!lws_hdr_total_length(wsi, WSI_TOKEN_HOST)) { - if (!lws_hdr_total_length(wsi, - WSI_TOKEN_HTTP_COLON_AUTHORITY)) - goto bail_nuke_ah; - n = lws_snprintf((char *)end, 256, - "%s%s%s/", oprot[!!lws_is_ssl(wsi)], - lws_hdr_simple_ptr(wsi, - WSI_TOKEN_HTTP_COLON_AUTHORITY), - uri_ptr); - } else - n = lws_snprintf((char *)end, 256, - "%s%s%s/", oprot[!!lws_is_ssl(wsi)], - lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST), - uri_ptr); - } - - lws_clean_url((char *)end); - n = lws_http_redirect(wsi, HTTP_STATUS_MOVED_PERMANENTLY, - end, n, &p, end); - if ((int)n < 0) - goto bail_nuke_ah; - - return lws_http_transaction_completed(wsi); - } - -#if LWS_POSIX - /* basic auth? */ - - if (hit->basic_auth_login_file) { - char b64[160], plain[(sizeof(b64) * 3) / 4]; - int m; - - /* Did he send auth? */ - if (!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_AUTHORIZATION)) - return lws_unauthorised_basic_auth(wsi); - - n = HTTP_STATUS_FORBIDDEN; - - m = lws_hdr_copy(wsi, b64, sizeof(b64), - WSI_TOKEN_HTTP_AUTHORIZATION); - if (m < 7) { - lwsl_err("b64 auth too long\n"); - goto transaction_result_n; - } - - b64[5] = '\0'; - if (strcasecmp(b64, "Basic")) { - lwsl_err("auth missing basic: %s\n", b64); - goto transaction_result_n; - } - - /* It'll be like Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l */ - - m = lws_b64_decode_string(b64 + 6, plain, sizeof(plain)); - if (m < 0) { - lwsl_err("plain auth too long\n"); - goto transaction_result_n; - } - - if (!lws_find_string_in_file(hit->basic_auth_login_file, - plain, m)) { - lwsl_err("basic auth lookup failed\n"); - return lws_unauthorised_basic_auth(wsi); - } - - lwsl_notice("basic auth accepted\n"); - - /* accept the auth */ - } -#endif - -#if defined(LWS_WITH_HTTP_PROXY) - /* - * The mount is a reverse proxy? - */ - - if (hit->origin_protocol == LWSMPRO_HTTPS || - hit->origin_protocol == LWSMPRO_HTTP) { - struct lws_client_connect_info i; - char ads[96], rpath[256], *pcolon, *pslash, *p; - int n, na; - - memset(&i, 0, sizeof(i)); - i.context = lws_get_context(wsi); - - pcolon = strchr(hit->origin, ':'); - pslash = strchr(hit->origin, '/'); - if (!pslash) { - lwsl_err("Proxy mount origin '%s' must have /\n", - hit->origin); - return -1; - } - if (pcolon > pslash) - pcolon = NULL; - - if (pcolon) - n = pcolon - hit->origin; - else - n = pslash - hit->origin; - - if (n >= sizeof(ads) - 2) - n = sizeof(ads) - 2; - - memcpy(ads, hit->origin, n); - ads[n] = '\0'; - - i.address = ads; - i.port = 80; - if (hit->origin_protocol == LWSMPRO_HTTPS) { - i.port = 443; - i.ssl_connection = 1; - } - if (pcolon) - i.port = atoi(pcolon + 1); - - lws_snprintf(rpath, sizeof(rpath) - 1, "/%s/%s", pslash + 1, - uri_ptr + hit->mountpoint_len); - lws_clean_url(rpath); - na = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_URI_ARGS); - if (na) { - p = rpath + strlen(rpath); - *p++ = '?'; - lws_hdr_copy(wsi, p, &rpath[sizeof(rpath) - 1] - p, - WSI_TOKEN_HTTP_URI_ARGS); - while (--na) { - if (*p == '\0') - *p = '&'; - p++; - } - } - - - i.path = rpath; - i.host = i.address; - i.origin = NULL; - i.method = "GET"; - i.parent_wsi = wsi; - i.uri_replace_from = hit->origin; - i.uri_replace_to = hit->mountpoint; - - lwsl_notice("proxying to %s port %d url %s, ssl %d, from %s, to %s\n", - i.address, i.port, i.path, i.ssl_connection, - i.uri_replace_from, i.uri_replace_to); - - if (!lws_client_connect_via_info(&i)) { - lwsl_err("proxy connect fail\n"); - return 1; - } - - return 0; - } -#endif - - /* - * A particular protocol callback is mounted here? - * - * For the duration of this http transaction, bind us to the - * associated protocol - */ - if (hit->origin_protocol == LWSMPRO_CALLBACK || hit->protocol) { - const struct lws_protocols *pp; - const char *name = hit->origin; - if (hit->protocol) - name = hit->protocol; - - pp = lws_vhost_name_to_protocol(wsi->vhost, name); - if (!pp) { - n = -1; - lwsl_err("Unable to find plugin '%s'\n", - hit->origin); - return 1; - } - - if (lws_bind_protocol(wsi, pp)) - return 1; - - args.p = uri_ptr; - args.len = uri_len; - args.max_len = hit->auth_mask; - args.final = 0; /* used to signal callback dealt with it */ - - n = wsi->protocol->callback(wsi, LWS_CALLBACK_CHECK_ACCESS_RIGHTS, - wsi->user_space, &args, 0); - if (n) { - lws_return_http_status(wsi, HTTP_STATUS_UNAUTHORIZED, - NULL); - goto bail_nuke_ah; - } - if (args.final) /* callback completely handled it well */ - return 0; - - if (hit->cgienv && wsi->protocol->callback(wsi, - LWS_CALLBACK_HTTP_PMO, - wsi->user_space, (void *)hit->cgienv, 0)) - return 1; - - if (lws_hdr_total_length(wsi, WSI_TOKEN_POST_URI)) { - n = wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP, - wsi->user_space, - uri_ptr + hit->mountpoint_len, - uri_len - hit->mountpoint_len); - goto after; - } - } - -#ifdef LWS_WITH_CGI - /* did we hit something with a cgi:// origin? */ - if (hit->origin_protocol == LWSMPRO_CGI) { - const char *cmd[] = { - NULL, /* replace with cgi path */ - NULL - }; - - lwsl_debug("%s: cgi\n", __func__); - cmd[0] = hit->origin; - - n = 5; - if (hit->cgi_timeout) - n = hit->cgi_timeout; - - n = lws_cgi(wsi, cmd, hit->mountpoint_len, n, - hit->cgienv); - if (n) { - lwsl_err("%s: cgi failed\n", __func__); - return -1; - } - - goto deal_body; - } -#endif - - n = strlen(s); - if (s[0] == '\0' || (n == 1 && s[n - 1] == '/')) - s = (char *)hit->def; - if (!s) - s = "index.html"; - - wsi->cache_secs = hit->cache_max_age; - wsi->cache_reuse = hit->cache_reusable; - wsi->cache_revalidate = hit->cache_revalidate; - wsi->cache_intermediaries = hit->cache_intermediaries; - - n = lws_http_serve(wsi, s, hit->origin, hit); - if (n) { - /* - * lws_return_http_status(wsi, HTTP_STATUS_NOT_FOUND, NULL); - */ - if (hit->protocol) { - const struct lws_protocols *pp = lws_vhost_name_to_protocol( - wsi->vhost, hit->protocol); - - if (lws_bind_protocol(wsi, pp)) - return 1; - - n = pp->callback(wsi, LWS_CALLBACK_HTTP, - wsi->user_space, - uri_ptr + hit->mountpoint_len, - uri_len - hit->mountpoint_len); - } else - n = wsi->protocol->callback(wsi, LWS_CALLBACK_HTTP, - wsi->user_space, uri_ptr, uri_len); - } - -after: - if (n) { - lwsl_info("LWS_CALLBACK_HTTP closing\n"); - - return 1; - } - -#ifdef LWS_WITH_CGI -deal_body: -#endif - /* - * If we're not issuing a file, check for content_length or - * HTTP keep-alive. No keep-alive header allocation for - * ISSUING_FILE, as this uses HTTP/1.0. - * - * In any case, return 0 and let lws_read decide how to - * proceed based on state - */ - if (wsi->state != LWSS_HTTP_ISSUING_FILE) { - /* Prepare to read body if we have a content length: */ - lwsl_debug("wsi->u.http.rx_content_length %lld %d %d\n", - (long long)wsi->u.http.rx_content_length, - wsi->upgraded_to_http2, wsi->http2_substream); - if (wsi->u.http.rx_content_length > 0) { - lwsl_notice("%s: %p: LWSS_HTTP_BODY state set\n", - __func__, wsi); - wsi->state = LWSS_HTTP_BODY; - wsi->u.http.rx_content_remain = - wsi->u.http.rx_content_length; - } - } - - return 0; - -bail_nuke_ah: - /* we're closing, losing some rx is OK */ - lws_header_table_force_to_detachable_state(wsi); - lws_header_table_detach(wsi, 1); - - return 1; - -#if LWS_POSIX -transaction_result_n: - lws_return_http_status(wsi, n, NULL); - - return lws_http_transaction_completed(wsi); -#endif -} - -static int -lws_server_init_wsi_for_ws(struct lws *wsi) -{ - int n; - - wsi->state = LWSS_ESTABLISHED; - lws_restart_ws_ping_pong_timer(wsi); - - /* - * create the frame buffer for this connection according to the - * size mentioned in the protocol definition. If 0 there, use - * a big default for compatibility - */ - - n = wsi->protocol->rx_buffer_size; - if (!n) - n = wsi->context->pt_serv_buf_size; - n += LWS_PRE; - wsi->u.ws.rx_ubuf = lws_malloc(n + 4 /* 0x0000ffff zlib */, "rx_ubuf"); - if (!wsi->u.ws.rx_ubuf) { - lwsl_err("Out of Mem allocating rx buffer %d\n", n); - return 1; - } - wsi->u.ws.rx_ubuf_alloc = n; - lwsl_debug("Allocating RX buffer %d\n", n); - -#if LWS_POSIX && !defined(LWS_WITH_ESP32) - if (!wsi->parent_carries_io) - if (setsockopt(wsi->desc.sockfd, SOL_SOCKET, SO_SNDBUF, - (const char *)&n, sizeof n)) { - lwsl_warn("Failed to set SNDBUF to %d", n); - return 1; - } -#endif - - /* notify user code that we're ready to roll */ - - if (wsi->protocol->callback) - if (wsi->protocol->callback(wsi, LWS_CALLBACK_ESTABLISHED, - wsi->user_space, -#ifdef LWS_OPENSSL_SUPPORT - wsi->ssl, -#else - NULL, -#endif - 0)) - return 1; - - return 0; -} - -int -lws_handshake_server(struct lws *wsi, unsigned char **buf, size_t len) -{ - int protocol_len, n = 0, hit, non_space_char_found = 0, m; - struct lws_context *context = lws_get_context(wsi); - struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi]; - struct _lws_header_related hdr; - struct allocated_headers *ah; - unsigned char *obuf = *buf; - char protocol_list[128]; - char protocol_name[64]; - size_t olen = len; - char *p; - - if (len >= 10000000) { - lwsl_err("%s: assert: len %ld\n", __func__, (long)len); - assert(0); - } - - if (!wsi->u.hdr.ah) { - lwsl_err("%s: assert: NULL ah\n", __func__); - assert(0); - } - - lwsl_hexdump(*buf, len); - - while (len--) { - wsi->more_rx_waiting = !!len; - - if (wsi->mode != LWSCM_HTTP_SERVING && - wsi->mode != LWSCM_HTTP2_SERVING && - wsi->mode != LWSCM_HTTP_SERVING_ACCEPTED) { - lwsl_err("%s: bad wsi mode %d\n", __func__, wsi->mode); - goto bail_nuke_ah; - } - - m = lws_parse(wsi, *(*buf)++); - if (m) { - if (m == 2) { - /* - * we are transitioning from http with - * an AH, to raw. Drop the ah and set - * the mode. - */ -raw_transition: - lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0); - lws_bind_protocol(wsi, &wsi->vhost->protocols[ - wsi->vhost-> - raw_protocol_index]); - lwsl_info("transition to raw vh %s prot %d\n", - wsi->vhost->name, - wsi->vhost->raw_protocol_index); - if ((wsi->protocol->callback)(wsi, - LWS_CALLBACK_RAW_ADOPT, - wsi->user_space, NULL, 0)) - goto bail_nuke_ah; - - lws_header_table_force_to_detachable_state(wsi); - lws_union_transition(wsi, LWSCM_RAW); - lws_header_table_detach(wsi, 1); - - if (m == 2 && (wsi->protocol->callback)(wsi, - LWS_CALLBACK_RAW_RX, - wsi->user_space, obuf, olen)) - return 1; - - return 0; - } - lwsl_info("lws_parse failed\n"); - goto bail_nuke_ah; - } - - if (wsi->u.hdr.parser_state != WSI_PARSING_COMPLETE) - continue; - - lwsl_parser("%s: lws_parse sees parsing complete\n", __func__); - lwsl_debug("%s: wsi->more_rx_waiting=%d\n", __func__, - wsi->more_rx_waiting); - - /* select vhost */ - - if (lws_hdr_total_length(wsi, WSI_TOKEN_HOST)) { - struct lws_vhost *vhost = lws_select_vhost( - context, wsi->vhost->listen_port, - lws_hdr_simple_ptr(wsi, WSI_TOKEN_HOST)); - - if (vhost) - wsi->vhost = vhost; - } else - lwsl_info("no host\n"); - - if (wsi->mode != LWSCM_HTTP2_SERVING) { - wsi->vhost->conn_stats.h1_trans++; - if (!wsi->conn_stat_done) { - wsi->vhost->conn_stats.h1_conn++; - wsi->conn_stat_done = 1; - } - } - - /* check for unwelcome guests */ - - if (wsi->context->reject_service_keywords) { - const struct lws_protocol_vhost_options *rej = - wsi->context->reject_service_keywords; - char ua[384], *msg = NULL; - - if (lws_hdr_copy(wsi, ua, sizeof(ua) - 1, - WSI_TOKEN_HTTP_USER_AGENT) > 0) { - ua[sizeof(ua) - 1] = '\0'; - while (rej) { - if (strstr(ua, rej->name)) { -#ifdef LWS_WITH_ACCESS_LOG - char *uri_ptr = NULL; - int meth, uri_len; -#endif - - msg = strchr(rej->value, ' '); - if (msg) - msg++; - lws_return_http_status(wsi, - atoi(rej->value), msg); -#ifdef LWS_WITH_ACCESS_LOG - meth = lws_http_get_uri_and_method(wsi, - &uri_ptr, &uri_len); - if (meth >= 0) - lws_prepare_access_log_info(wsi, - uri_ptr, meth); - - /* wsi close will do the log */ -#endif - wsi->vhost->conn_stats.rejected++; - /* - * We don't want anything from - * this rejected guy. Follow - * the close flow, not the - * transaction complete flow. - */ - goto bail_nuke_ah; - } - rej = rej->next; - } - } - } - - - if (lws_hdr_total_length(wsi, WSI_TOKEN_CONNECT)) { - lwsl_info("Changing to RAW mode\n"); - m = 0; - goto raw_transition; - } - - wsi->mode = LWSCM_PRE_WS_SERVING_ACCEPT; - lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0); - - /* is this websocket protocol or normal http 1.0? */ - - if (lws_hdr_total_length(wsi, WSI_TOKEN_UPGRADE)) { - if (!strcasecmp(lws_hdr_simple_ptr(wsi, WSI_TOKEN_UPGRADE), - "websocket")) { - wsi->vhost->conn_stats.ws_upg++; - lwsl_info("Upgrade to ws\n"); - goto upgrade_ws; - } -#ifdef LWS_WITH_HTTP2 - if (!strcasecmp(lws_hdr_simple_ptr(wsi, WSI_TOKEN_UPGRADE), - "h2c")) { - wsi->vhost->conn_stats.h2_upg++; - lwsl_info("Upgrade to h2c\n"); - goto upgrade_h2c; - } -#endif - lwsl_info("Unknown upgrade\n"); - /* dunno what he wanted to upgrade to */ - goto bail_nuke_ah; - } - - /* no upgrade ack... he remained as HTTP */ - - lwsl_info("No upgrade\n"); - ah = wsi->u.hdr.ah; - - lws_union_transition(wsi, LWSCM_HTTP_SERVING_ACCEPTED); - wsi->state = LWSS_HTTP; - wsi->u.http.fop_fd = NULL; - - /* expose it at the same offset as u.hdr */ - wsi->u.http.ah = ah; - lwsl_debug("%s: wsi %p: ah %p\n", __func__, (void *)wsi, - (void *)wsi->u.hdr.ah); - - n = lws_http_action(wsi); - - return n; - -#ifdef LWS_WITH_HTTP2 -upgrade_h2c: - if (!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP2_SETTINGS)) { - lwsl_info("missing http2_settings\n"); - goto bail_nuke_ah; - } - - lwsl_info("h2c upgrade...\n"); - - p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP2_SETTINGS); - /* convert the peer's HTTP-Settings */ - n = lws_b64_decode_string(p, protocol_list, - sizeof(protocol_list)); - if (n < 0) { - lwsl_parser("HTTP2_SETTINGS too long\n"); - return 1; - } - - /* adopt the header info */ - - ah = wsi->u.hdr.ah; - - lws_union_transition(wsi, LWSCM_HTTP2_SERVING); - - /* http2 union member has http union struct at start */ - wsi->u.http.ah = ah; - - if (!wsi->u.h2.h2n) { - wsi->u.h2.h2n = lws_zalloc(sizeof(*wsi->u.h2.h2n), "h2n"); - if (!wsi->u.h2.h2n) - return 1; - } - - lws_h2_init(wsi); - - /* HTTP2 union */ - - lws_h2_settings(wsi, &wsi->u.h2.h2n->set, - (unsigned char *)protocol_list, n); - - lws_hpack_dynamic_size(wsi, wsi->u.h2.h2n->set.s[ - H2SET_HEADER_TABLE_SIZE]); - - strcpy(protocol_list, "HTTP/1.1 101 Switching Protocols\x0d\x0a" - "Connection: Upgrade\x0d\x0a" - "Upgrade: h2c\x0d\x0a\x0d\x0a"); - n = lws_issue_raw(wsi, (unsigned char *)protocol_list, - strlen(protocol_list)); - if (n != strlen(protocol_list)) { - lwsl_debug("http2 switch: ERROR writing to socket\n"); - return 1; - } - - wsi->state = LWSS_HTTP2_AWAIT_CLIENT_PREFACE; - - return 0; -#endif - -upgrade_ws: - if (!wsi->protocol) - lwsl_err("NULL protocol at lws_read\n"); - - /* - * It's websocket - * - * Select the first protocol we support from the list - * the client sent us. - * - * Copy it to remove header fragmentation - */ - - if (lws_hdr_copy(wsi, protocol_list, sizeof(protocol_list) - 1, - WSI_TOKEN_PROTOCOL) < 0) { - lwsl_err("protocol list too long"); - goto bail_nuke_ah; - } - - protocol_len = lws_hdr_total_length(wsi, WSI_TOKEN_PROTOCOL); - protocol_list[protocol_len] = '\0'; - p = protocol_list; - hit = 0; - - while (*p && !hit) { - n = 0; - non_space_char_found = 0; - while (n < sizeof(protocol_name) - 1 && - *p && *p != ',') { - /* ignore leading spaces */ - if (!non_space_char_found && *p == ' ') { - n++; - continue; - } - non_space_char_found = 1; - protocol_name[n++] = *p++; - } - protocol_name[n] = '\0'; - if (*p) - p++; - - lwsl_info("checking %s\n", protocol_name); - - n = 0; - while (wsi->vhost->protocols[n].callback) { - lwsl_info("try %s\n", - wsi->vhost->protocols[n].name); - - if (wsi->vhost->protocols[n].name && - !strcmp(wsi->vhost->protocols[n].name, - protocol_name)) { - wsi->protocol = &wsi->vhost->protocols[n]; - hit = 1; - break; - } - - n++; - } - } - - /* we didn't find a protocol he wanted? */ - - if (!hit) { - if (lws_hdr_simple_ptr(wsi, WSI_TOKEN_PROTOCOL)) { - lwsl_info("No protocol from \"%s\" supported\n", - protocol_list); - goto bail_nuke_ah; - } - /* - * some clients only have one protocol and - * do not send the protocol list header... - * allow it and match to the vhost's default - * protocol (which itself defaults to zero) - */ - lwsl_info("defaulting to prot handler %d\n", - wsi->vhost->default_protocol_index); - n = wsi->vhost->default_protocol_index; - wsi->protocol = &wsi->vhost->protocols[ - (int)wsi->vhost->default_protocol_index]; - } - - /* allocate wsi->user storage */ - if (lws_ensure_user_space(wsi)) - goto bail_nuke_ah; - - /* - * Give the user code a chance to study the request and - * have the opportunity to deny it - */ - if ((wsi->protocol->callback)(wsi, - LWS_CALLBACK_FILTER_PROTOCOL_CONNECTION, - wsi->user_space, - lws_hdr_simple_ptr(wsi, WSI_TOKEN_PROTOCOL), 0)) { - lwsl_warn("User code denied connection\n"); - goto bail_nuke_ah; - } - - /* - * Perform the handshake according to the protocol version the - * client announced - */ - - switch (wsi->ietf_spec_revision) { - case 13: - lwsl_parser("lws_parse calling handshake_04\n"); - if (handshake_0405(context, wsi)) { - lwsl_info("hs0405 has failed the connection\n"); - goto bail_nuke_ah; - } - break; - - default: - lwsl_info("Unknown client spec version %d\n", - wsi->ietf_spec_revision); - goto bail_nuke_ah; - } - - lws_same_vh_protocol_insert(wsi, n); - - /* we are upgrading to ws, so http/1.1 and keepalive + - * pipelined header considerations about keeping the ah around - * no longer apply. However it's common for the first ws - * protocol data to have been coalesced with the browser - * upgrade request and to already be in the ah rx buffer. - */ - - lwsl_info("%s: %p: inheriting ws ah (rxpos:%d, rxlen:%d)\n", - __func__, wsi, wsi->u.hdr.ah->rxpos, - wsi->u.hdr.ah->rxlen); - lws_pt_lock(pt); - hdr = wsi->u.hdr; - - lws_union_transition(wsi, LWSCM_WS_SERVING); - /* - * first service is WS mode will notice this, use the RX and - * then detach the ah (caution: we are not in u.hdr union - * mode any more then... ah_temp member is at start the same - * though) - * - * Because rxpos/rxlen shows something in the ah, we will get - * service guaranteed next time around the event loop - * - * All union members begin with hdr, so we can use it even - * though we transitioned to ws union mode (the ah detach - * code uses it anyway). - */ - wsi->u.hdr = hdr; - lws_pt_unlock(pt); - - lws_server_init_wsi_for_ws(wsi); - lwsl_parser("accepted v%02d connection\n", - wsi->ietf_spec_revision); - - /* !!! drop ah unreservedly after ESTABLISHED */ - if (!wsi->more_rx_waiting) { - lws_header_table_force_to_detachable_state(wsi); - lws_header_table_detach(wsi, 1); - } - - return 0; - } /* while all chars are handled */ - - return 0; - -bail_nuke_ah: - /* drop the header info */ - /* we're closing, losing some rx is OK */ - lws_header_table_force_to_detachable_state(wsi); - lws_header_table_detach(wsi, 1); - - return 1; -} - - -static int -lws_get_idlest_tsi(struct lws_context *context) -{ - unsigned int lowest = ~0; - int n = 0, hit = -1; - - for (; n < context->count_threads; n++) { - if ((unsigned int)context->pt[n].fds_count != - context->fd_limit_per_thread - 1 && - (unsigned int)context->pt[n].fds_count < lowest) { - lowest = context->pt[n].fds_count; - hit = n; - } - } - - return hit; -} - -struct lws * -lws_create_new_server_wsi(struct lws_vhost *vhost) -{ - struct lws *new_wsi; - int n = lws_get_idlest_tsi(vhost->context); - - if (n < 0) { - lwsl_err("no space for new conn\n"); - return NULL; - } - - new_wsi = lws_zalloc(sizeof(struct lws), "new server wsi"); - if (new_wsi == NULL) { - lwsl_err("Out of memory for new connection\n"); - return NULL; - } - - new_wsi->tsi = n; - lwsl_debug("new wsi %p joining vhost %s, tsi %d\n", new_wsi, - vhost->name, new_wsi->tsi); - - new_wsi->vhost = vhost; - new_wsi->context = vhost->context; - new_wsi->pending_timeout = NO_PENDING_TIMEOUT; - new_wsi->rxflow_change_to = LWS_RXFLOW_ALLOW; - - /* initialize the instance struct */ - - new_wsi->state = LWSS_HTTP; - new_wsi->mode = LWSCM_HTTP_SERVING; - new_wsi->hdr_parsing_completed = 0; - -#ifdef LWS_OPENSSL_SUPPORT - new_wsi->use_ssl = LWS_SSL_ENABLED(vhost); -#endif - - /* - * these can only be set once the protocol is known - * we set an un-established connection's protocol pointer - * to the start of the supported list, so it can look - * for matching ones during the handshake - */ - new_wsi->protocol = vhost->protocols; - new_wsi->user_space = NULL; - new_wsi->ietf_spec_revision = 0; - new_wsi->desc.sockfd = LWS_SOCK_INVALID; - new_wsi->position_in_fds_table = -1; - - vhost->context->count_wsi_allocated++; - - /* - * outermost create notification for wsi - * no user_space because no protocol selection - */ - vhost->protocols[0].callback(new_wsi, LWS_CALLBACK_WSI_CREATE, - NULL, NULL, 0); - - return new_wsi; -} - -LWS_VISIBLE int LWS_WARN_UNUSED_RESULT -lws_http_transaction_completed(struct lws *wsi) -{ - int n = NO_PENDING_TIMEOUT; - - lwsl_info("%s: wsi %p\n", __func__, wsi); - - lws_access_log(wsi); - - if (!wsi->hdr_parsing_completed) { - lwsl_notice("%s: ignoring, ah parsing incomplete\n", __func__); - return 0; - } - - lwsl_debug("%s: wsi %p\n", __func__, wsi); - /* if we can't go back to accept new headers, drop the connection */ - if (wsi->http2_substream) - return 0; - - if (wsi->seen_zero_length_recv) - return 1; - - if (wsi->u.http.connection_type != HTTP_CONNECTION_KEEP_ALIVE) { - lwsl_info("%s: %p: close connection\n", __func__, wsi); - return 1; - } - - if (lws_bind_protocol(wsi, &wsi->vhost->protocols[0])) - return 1; - - /* otherwise set ourselves up ready to go again */ - wsi->state = LWSS_HTTP; - wsi->mode = LWSCM_HTTP_SERVING; - wsi->u.http.tx_content_length = 0; - wsi->u.http.tx_content_remain = 0; - wsi->hdr_parsing_completed = 0; -#ifdef LWS_WITH_ACCESS_LOG - wsi->access_log.sent = 0; -#endif - - if (wsi->vhost->keepalive_timeout) - n = PENDING_TIMEOUT_HTTP_KEEPALIVE_IDLE; - lws_set_timeout(wsi, n, wsi->vhost->keepalive_timeout); - - /* - * We already know we are on http1.1 / keepalive and the next thing - * coming will be another header set. - * - * If there is no pending rx and we still have the ah, drop it and - * reacquire a new ah when the new headers start to arrive. (Otherwise - * we needlessly hog an ah indefinitely.) - * - * However if there is pending rx and we know from the keepalive state - * that is already at least the start of another header set, simply - * reset the existing header table and keep it. - */ - if (wsi->u.hdr.ah) { - lwsl_debug("%s: wsi->more_rx_waiting=%d\n", __func__, - wsi->more_rx_waiting); - - if (!wsi->more_rx_waiting) { - lws_header_table_force_to_detachable_state(wsi); - lws_header_table_detach(wsi, 1); -#ifdef LWS_OPENSSL_SUPPORT - /* - * additionally... if we are hogging an SSL instance - * with no pending pipelined headers (or ah now), and - * SSL is scarce, drop this connection without waiting - */ - - if (wsi->vhost->use_ssl && - wsi->context->simultaneous_ssl_restriction && - wsi->context->simultaneous_ssl == - wsi->context->simultaneous_ssl_restriction) { - lwsl_info("%s: simultaneous_ssl_restriction\n", - __func__); - return 1; - } -#endif - } else { - lws_header_table_reset(wsi, 1); - /* - * If we kept the ah, we should restrict the amount - * of time we are willing to keep it. Otherwise it - * will be bound the whole time the connection remains - * open. - */ - lws_set_timeout(wsi, PENDING_TIMEOUT_HOLDING_AH, - wsi->vhost->keepalive_timeout); - } - } - - /* If we're (re)starting on headers, need other implied init */ - wsi->u.hdr.ues = URIES_IDLE; - - lwsl_info("%s: %p: keep-alive await new transaction\n", __func__, wsi); - - return 0; -} - -/* if not a socket, it's a raw, non-ssl file descriptor */ - -LWS_VISIBLE struct lws * -lws_adopt_descriptor_vhost(struct lws_vhost *vh, lws_adoption_type type, - lws_sock_file_fd_type fd, const char *vh_prot_name, - struct lws *parent) -{ - struct lws_context *context = vh->context; - struct lws *new_wsi; - struct lws_context_per_thread *pt; - int n, ssl = 0; - -#if defined(LWS_WITH_PEER_LIMITS) - struct lws_peer *peer = NULL; - - if (type & LWS_ADOPT_SOCKET && !(type & LWS_ADOPT_WS_PARENTIO)) { - peer = lws_get_or_create_peer(vh, fd.sockfd); - - if (!peer) { - lwsl_err("OOM creating peer\n"); - return NULL; - } - if (context->ip_limit_wsi && - peer->count_wsi >= context->ip_limit_wsi) { - lwsl_notice("Peer reached wsi limit %d\n", - context->ip_limit_wsi); - lws_stats_atomic_bump(context, &context->pt[0], - LWSSTATS_C_PEER_LIMIT_WSI_DENIED, 1); - return NULL; - } - } -#endif - - new_wsi = lws_create_new_server_wsi(vh); - if (!new_wsi) { - if (type & LWS_ADOPT_SOCKET && !(type & LWS_ADOPT_WS_PARENTIO)) - compatible_close(fd.sockfd); - return NULL; - } -#if defined(LWS_WITH_PEER_LIMITS) - if (peer) - lws_peer_add_wsi(context, peer, new_wsi); -#endif - pt = &context->pt[(int)new_wsi->tsi]; - lws_stats_atomic_bump(context, pt, LWSSTATS_C_CONNECTIONS, 1); - - if (parent) { - new_wsi->parent = parent; - new_wsi->sibling_list = parent->child_list; - parent->child_list = new_wsi; - - if (type & LWS_ADOPT_WS_PARENTIO) - new_wsi->parent_carries_io = 1; - } - - new_wsi->desc = fd; - - if (vh_prot_name) { - new_wsi->protocol = lws_vhost_name_to_protocol(new_wsi->vhost, - vh_prot_name); - if (!new_wsi->protocol) { - lwsl_err("Protocol %s not enabled on vhost %s\n", - vh_prot_name, new_wsi->vhost->name); - goto bail; - } - if (lws_ensure_user_space(new_wsi)) { - lwsl_notice("OOM trying to get user_space\n"); - goto bail; - } - if (type & LWS_ADOPT_WS_PARENTIO) { - new_wsi->desc.sockfd = LWS_SOCK_INVALID; - lwsl_debug("binding to %s\n", new_wsi->protocol->name); - lws_bind_protocol(new_wsi, new_wsi->protocol); - lws_union_transition(new_wsi, LWSCM_WS_SERVING); - lws_server_init_wsi_for_ws(new_wsi); - - return new_wsi; - } - } else - if (type & LWS_ADOPT_HTTP) /* he will transition later */ - new_wsi->protocol = - &vh->protocols[vh->default_protocol_index]; - else { /* this is the only time he will transition */ - lws_bind_protocol(new_wsi, - &vh->protocols[vh->raw_protocol_index]); - lws_union_transition(new_wsi, LWSCM_RAW); - } - - if (type & LWS_ADOPT_SOCKET) { /* socket desc */ - lwsl_debug("%s: new wsi %p, sockfd %d\n", __func__, new_wsi, - (int)(lws_intptr_t)fd.sockfd); - - if (type & LWS_ADOPT_HTTP) - /* the transport is accepted... - * give him time to negotiate */ - lws_set_timeout(new_wsi, - PENDING_TIMEOUT_ESTABLISH_WITH_SERVER, - context->timeout_secs); - -#if LWS_POSIX == 0 -#if defined(LWS_WITH_ESP8266) - esp8266_tcp_stream_accept(accept_fd, new_wsi); -#endif -#endif - } else /* file desc */ - lwsl_debug("%s: new wsi %p, filefd %d\n", __func__, new_wsi, - (int)(lws_intptr_t)fd.filefd); - - /* - * A new connection was accepted. Give the user a chance to - * set properties of the newly created wsi. There's no protocol - * selected yet so we issue this to the vhosts's default protocol, - * itself by default protocols[0] - */ - n = LWS_CALLBACK_SERVER_NEW_CLIENT_INSTANTIATED; - if (!(type & LWS_ADOPT_HTTP)) { - if (!(type & LWS_ADOPT_SOCKET)) - n = LWS_CALLBACK_RAW_ADOPT_FILE; - else - n = LWS_CALLBACK_RAW_ADOPT; - } - - if (!LWS_SSL_ENABLED(new_wsi->vhost) || !(type & LWS_ADOPT_ALLOW_SSL) || - !(type & LWS_ADOPT_SOCKET)) { - /* non-SSL */ - if (!(type & LWS_ADOPT_HTTP)) { - if (!(type & LWS_ADOPT_SOCKET)) - new_wsi->mode = LWSCM_RAW_FILEDESC; - else - new_wsi->mode = LWSCM_RAW; - } - } else { - /* SSL */ - if (!(type & LWS_ADOPT_HTTP)) - new_wsi->mode = LWSCM_SSL_INIT_RAW; - else - new_wsi->mode = LWSCM_SSL_INIT; - - ssl = 1; - } - - lws_libev_accept(new_wsi, new_wsi->desc); - lws_libuv_accept(new_wsi, new_wsi->desc); - lws_libevent_accept(new_wsi, new_wsi->desc); - - if (!ssl) { - if (insert_wsi_socket_into_fds(context, new_wsi)) { - lwsl_err("%s: fail inserting socket\n", __func__); - goto fail; - } - } else - if (lws_server_socket_service_ssl(new_wsi, fd.sockfd)) { - lwsl_info("%s: fail ssl negotiation\n", __func__); - goto fail; - } - - /* - * by deferring callback to this point, after insertion to fds, - * lws_callback_on_writable() can work from the callback - */ - if ((new_wsi->protocol->callback)( - new_wsi, n, new_wsi->user_space, NULL, 0)) - goto fail; - - if (type & LWS_ADOPT_HTTP) { - if (!lws_header_table_attach(new_wsi, 0)) - lwsl_debug("Attached ah immediately\n"); - else - lwsl_info("%s: waiting for ah\n", __func__); - } - - return new_wsi; - -fail: - if (type & LWS_ADOPT_SOCKET) - lws_close_free_wsi(new_wsi, LWS_CLOSE_STATUS_NOSTATUS); - - return NULL; - -bail: - lwsl_notice("%s: exiting on bail\n", __func__); - if (parent) - parent->child_list = new_wsi->sibling_list; - if (new_wsi->user_space) - lws_free(new_wsi->user_space); - lws_free(new_wsi); - compatible_close(fd.sockfd); - - return NULL; -} - -LWS_VISIBLE struct lws * -lws_adopt_socket_vhost(struct lws_vhost *vh, lws_sockfd_type accept_fd) -{ - lws_sock_file_fd_type fd; - - fd.sockfd = accept_fd; - return lws_adopt_descriptor_vhost(vh, LWS_ADOPT_SOCKET | - LWS_ADOPT_HTTP | LWS_ADOPT_ALLOW_SSL, fd, NULL, NULL); -} - -LWS_VISIBLE struct lws * -lws_adopt_socket(struct lws_context *context, lws_sockfd_type accept_fd) -{ - return lws_adopt_socket_vhost(context->vhost_list, accept_fd); -} - -/* Common read-buffer adoption for lws_adopt_*_readbuf */ -static struct lws* -adopt_socket_readbuf(struct lws *wsi, const char *readbuf, size_t len) -{ - struct lws_context_per_thread *pt; - struct allocated_headers *ah; - struct lws_pollfd *pfd; - - if (!wsi) - return NULL; - - if (!readbuf || len == 0) - return wsi; - - if (len > sizeof(ah->rx)) { - lwsl_err("%s: rx in too big\n", __func__); - goto bail; - } - - /* - * we can't process the initial read data until we can attach an ah. - * - * if one is available, get it and place the data in his ah rxbuf... - * wsi with ah that have pending rxbuf get auto-POLLIN service. - * - * no autoservice because we didn't get a chance to attach the - * readbuf data to wsi or ah yet, and we will do it next if we get - * the ah. - */ - if (wsi->u.hdr.ah || !lws_header_table_attach(wsi, 0)) { - ah = wsi->u.hdr.ah; - memcpy(ah->rx, readbuf, len); - ah->rxpos = 0; - ah->rxlen = (int16_t)len; - - lwsl_notice("%s: calling service on readbuf ah\n", __func__); - pt = &wsi->context->pt[(int)wsi->tsi]; - - /* unlike a normal connect, we have the headers already - * (or the first part of them anyway). - * libuv won't come back and service us without a network - * event, so we need to do the header service right here. - */ - pfd = &pt->fds[wsi->position_in_fds_table]; - pfd->revents |= LWS_POLLIN; - lwsl_err("%s: calling service\n", __func__); - if (lws_service_fd_tsi(wsi->context, pfd, wsi->tsi)) - /* service closed us */ - return NULL; - - return wsi; - } - lwsl_err("%s: deferring handling ah\n", __func__); - /* - * hum if no ah came, we are on the wait list and must defer - * dealing with this until the ah arrives. - * - * later successful lws_header_table_attach() will apply the - * below to the rx buffer (via lws_header_table_reset()). - */ - wsi->u.hdr.preamble_rx = lws_malloc(len, "preamble_rx"); - if (!wsi->u.hdr.preamble_rx) { - lwsl_err("OOM\n"); - goto bail; - } - memcpy(wsi->u.hdr.preamble_rx, readbuf, len); - wsi->u.hdr.preamble_rx_len = len; - - return wsi; - -bail: - lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS); - - return NULL; -} - -LWS_VISIBLE struct lws * -lws_adopt_socket_readbuf(struct lws_context *context, lws_sockfd_type accept_fd, - const char *readbuf, size_t len) -{ - return adopt_socket_readbuf(lws_adopt_socket(context, accept_fd), - readbuf, len); -} - -LWS_VISIBLE struct lws * -lws_adopt_socket_vhost_readbuf(struct lws_vhost *vhost, - lws_sockfd_type accept_fd, - const char *readbuf, size_t len) -{ - return adopt_socket_readbuf(lws_adopt_socket_vhost(vhost, accept_fd), - readbuf, len); -} - -LWS_VISIBLE int -lws_server_socket_service(struct lws_context *context, struct lws *wsi, - struct lws_pollfd *pollfd) -{ - struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi]; - lws_sockfd_type accept_fd = LWS_SOCK_INVALID; - struct allocated_headers *ah; - lws_sock_file_fd_type fd; - int opts = LWS_ADOPT_SOCKET | LWS_ADOPT_ALLOW_SSL; -#if LWS_POSIX - struct sockaddr_storage cli_addr; - socklen_t clilen; -#endif - int n, len; - - switch (wsi->mode) { - - case LWSCM_HTTP_SERVING: - case LWSCM_HTTP_SERVING_ACCEPTED: - case LWSCM_HTTP2_SERVING: - case LWSCM_RAW: - - /* handle http headers coming in */ - - /* pending truncated sends have uber priority */ - - if (wsi->trunc_len) { - if (!(pollfd->revents & LWS_POLLOUT)) - break; - - if (lws_issue_raw(wsi, wsi->trunc_alloc + - wsi->trunc_offset, - wsi->trunc_len) < 0) - goto fail; - /* - * we can't afford to allow input processing to send - * something new, so spin around he event loop until - * he doesn't have any partials - */ - break; - } - - /* any incoming data ready? */ - - if (!(pollfd->revents & pollfd->events & LWS_POLLIN)) - goto try_pollout; - - /* - * If we previously just did POLLIN when IN and OUT were - * signalled (because POLLIN processing may have used up - * the POLLOUT), don't let that happen twice in a row... - * next time we see the situation favour POLLOUT - */ -#if !defined(LWS_WITH_ESP8266) - if (wsi->favoured_pollin && - (pollfd->revents & pollfd->events & LWS_POLLOUT)) { - lwsl_notice("favouring pollout\n"); - wsi->favoured_pollin = 0; - goto try_pollout; - } -#endif - - /* these states imply we MUST have an ah attached */ - - if (wsi->mode != LWSCM_RAW && (wsi->state == LWSS_HTTP || - wsi->state == LWSS_HTTP_ISSUING_FILE || - wsi->state == LWSS_HTTP_HEADERS)) { - if (!wsi->u.hdr.ah) { - /* no autoservice beacuse we will do it next */ - if (lws_header_table_attach(wsi, 0)) { - lwsl_info("wsi %p: ah get fail\n", wsi); - goto try_pollout; - } - } - ah = wsi->u.hdr.ah; - - /* if nothing in ah rx buffer, get some fresh rx */ - if (ah->rxpos == ah->rxlen) { - ah->rxlen = lws_ssl_capable_read(wsi, ah->rx, - sizeof(ah->rx)); - ah->rxpos = 0; - switch (ah->rxlen) { - case 0: - lwsl_info("%s: read 0 len a\n", __func__); - wsi->seen_zero_length_recv = 1; - lws_change_pollfd(wsi, LWS_POLLIN, 0); - goto try_pollout; - /* fallthru */ - case LWS_SSL_CAPABLE_ERROR: - goto fail; - case LWS_SSL_CAPABLE_MORE_SERVICE: - ah->rxlen = ah->rxpos = 0; - goto try_pollout; - } - - /* - * make sure ah does not get detached if we - * have live data in the rx - */ - if (ah->rxlen) - wsi->more_rx_waiting = 1; - } - - if (!(ah->rxpos != ah->rxlen && ah->rxlen)) { - lwsl_err("%s: assert: rxpos %d, rxlen %d\n", - __func__, ah->rxpos, ah->rxlen); - - assert(0); - } - - /* just ignore incoming if waiting for close */ - if (wsi->state != LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE && - wsi->state != LWSS_HTTP_ISSUING_FILE) { - /* - * otherwise give it to whoever wants it - * according to the connection state - */ - - n = lws_read(wsi, ah->rx + ah->rxpos, - ah->rxlen - ah->rxpos); - if (n < 0) /* we closed wsi */ - return 1; - - if (!wsi->u.hdr.ah) - break; - if ( wsi->u.hdr.ah->rxlen) - wsi->u.hdr.ah->rxpos += n; - - lwsl_debug("%s: wsi %p: ah read rxpos %d, rxlen %d\n", - __func__, wsi, wsi->u.hdr.ah->rxpos, - wsi->u.hdr.ah->rxlen); - - if (lws_header_table_is_in_detachable_state(wsi) && - (wsi->mode != LWSCM_HTTP_SERVING && - wsi->mode != LWSCM_HTTP_SERVING_ACCEPTED && - wsi->mode != LWSCM_HTTP2_SERVING)) - lws_header_table_detach(wsi, 1); - - break; - } - - goto try_pollout; - } - - len = lws_ssl_capable_read(wsi, pt->serv_buf, - context->pt_serv_buf_size); - lwsl_debug("%s: wsi %p read %d\r\n", __func__, wsi, len); - switch (len) { - case 0: - lwsl_info("%s: read 0 len b\n", __func__); - - /* fallthru */ - case LWS_SSL_CAPABLE_ERROR: - goto fail; - case LWS_SSL_CAPABLE_MORE_SERVICE: - goto try_pollout; - } - - if (len < 0) /* coverity */ - goto fail; - - if (wsi->mode == LWSCM_RAW) { - n = user_callback_handle_rxflow(wsi->protocol->callback, - wsi, LWS_CALLBACK_RAW_RX, - wsi->user_space, pt->serv_buf, len); - if (n < 0) { - lwsl_info("LWS_CALLBACK_RAW_RX_fail\n"); - goto fail; - } - goto try_pollout; - } - - /* just ignore incoming if waiting for close */ - if (wsi->state != LWSS_FLUSHING_STORED_SEND_BEFORE_CLOSE && - wsi->state != LWSS_HTTP_ISSUING_FILE) { - /* - * this may want to send - * (via HTTP callback for example) - */ - n = lws_read(wsi, pt->serv_buf, len); - if (n < 0) /* we closed wsi */ - return 1; - /* - * he may have used up the - * writability above, if we will defer POLLOUT - * processing in favour of POLLIN, note it - */ - if (pollfd->revents & LWS_POLLOUT) - wsi->favoured_pollin = 1; - break; - } - /* - * he may have used up the - * writability above, if we will defer POLLOUT - * processing in favour of POLLIN, note it - */ - if (pollfd->revents & LWS_POLLOUT) - wsi->favoured_pollin = 1; - -try_pollout: - - /* this handles POLLOUT for http serving fragments */ - - if (!(pollfd->revents & LWS_POLLOUT)) - break; - - /* one shot */ - if (lws_change_pollfd(wsi, LWS_POLLOUT, 0)) { - lwsl_notice("%s a\n", __func__); - goto fail; - } - - if (wsi->mode == LWSCM_RAW) { - lws_stats_atomic_bump(wsi->context, pt, - LWSSTATS_C_WRITEABLE_CB, 1); -#if defined(LWS_WITH_STATS) - if (wsi->active_writable_req_us) { - uint64_t ul = time_in_microseconds() - - wsi->active_writable_req_us; - - lws_stats_atomic_bump(wsi->context, pt, - LWSSTATS_MS_WRITABLE_DELAY, ul); - lws_stats_atomic_max(wsi->context, pt, - LWSSTATS_MS_WORST_WRITABLE_DELAY, ul); - wsi->active_writable_req_us = 0; - } -#endif - n = user_callback_handle_rxflow(wsi->protocol->callback, - wsi, LWS_CALLBACK_RAW_WRITEABLE, - wsi->user_space, NULL, 0); - if (n < 0) { - lwsl_info("writeable_fail\n"); - goto fail; - } - break; - } - - if (!wsi->hdr_parsing_completed) - break; - - if (wsi->state != LWSS_HTTP_ISSUING_FILE) { - - lws_stats_atomic_bump(wsi->context, pt, - LWSSTATS_C_WRITEABLE_CB, 1); -#if defined(LWS_WITH_STATS) - if (wsi->active_writable_req_us) { - uint64_t ul = time_in_microseconds() - - wsi->active_writable_req_us; - - lws_stats_atomic_bump(wsi->context, pt, - LWSSTATS_MS_WRITABLE_DELAY, ul); - lws_stats_atomic_max(wsi->context, pt, - LWSSTATS_MS_WORST_WRITABLE_DELAY, ul); - wsi->active_writable_req_us = 0; - } -#endif - - n = user_callback_handle_rxflow(wsi->protocol->callback, - wsi, LWS_CALLBACK_HTTP_WRITEABLE, - wsi->user_space, NULL, 0); - if (n < 0) { - lwsl_info("writeable_fail\n"); - goto fail; - } - break; - } - - /* >0 == completion, <0 == error - * - * We'll get a LWS_CALLBACK_HTTP_FILE_COMPLETION callback when - * it's done. That's the case even if we just completed the - * send, so wait for that. - */ - n = lws_serve_http_file_fragment(wsi); - if (n < 0) - goto fail; - - break; - - case LWSCM_SERVER_LISTENER: - -#if LWS_POSIX - /* pollin means a client has connected to us then */ - - do { - if (!(pollfd->revents & LWS_POLLIN) || - !(pollfd->events & LWS_POLLIN)) - break; - -#ifdef LWS_OPENSSL_SUPPORT - /* - * can we really accept it, with regards to SSL limit? - * another vhost may also have had POLLIN on his listener this - * round and used it up already - */ - - if (wsi->vhost->use_ssl && - context->simultaneous_ssl_restriction && - context->simultaneous_ssl == - context->simultaneous_ssl_restriction) - /* no... ignore it, he won't come again until we are - * below the simultaneous_ssl_restriction limit and - * POLLIN is enabled on him again - */ - break; -#endif - /* listen socket got an unencrypted connection... */ - - clilen = sizeof(cli_addr); - lws_latency_pre(context, wsi); - - /* - * We cannot identify the peer who is in the listen - * socket connect queue before we accept it; even if - * we could, not accepting it due to PEER_LIMITS would - * block the connect queue for other legit peers. - */ - accept_fd = accept(pollfd->fd, (struct sockaddr *)&cli_addr, - &clilen); - lws_latency(context, wsi, "listener accept", accept_fd, - accept_fd >= 0); - if (accept_fd < 0) { - if (LWS_ERRNO == LWS_EAGAIN || - LWS_ERRNO == LWS_EWOULDBLOCK) { - break; - } - lwsl_err("ERROR on accept: %s\n", strerror(LWS_ERRNO)); - break; - } - - lws_plat_set_socket_options(wsi->vhost, accept_fd); - -#if defined(LWS_WITH_IPV6) - lwsl_debug("accepted new conn port %u on fd=%d\n", - ((cli_addr.ss_family == AF_INET6) ? - ntohs(((struct sockaddr_in6 *) &cli_addr)->sin6_port) : - ntohs(((struct sockaddr_in *) &cli_addr)->sin_port)), - accept_fd); -#else - lwsl_debug("accepted new conn port %u on fd=%d\n", - ntohs(((struct sockaddr_in *) &cli_addr)->sin_port), - accept_fd); -#endif - -#else - /* not very beautiful... */ - accept_fd = (lws_sockfd_type)pollfd; -#endif - /* - * look at who we connected to and give user code a chance - * to reject based on client IP. There's no protocol selected - * yet so we issue this to protocols[0] - */ - if ((wsi->vhost->protocols[0].callback)(wsi, - LWS_CALLBACK_FILTER_NETWORK_CONNECTION, - NULL, (void *)(lws_intptr_t)accept_fd, 0)) { - lwsl_debug("Callback denied network connection\n"); - compatible_close(accept_fd); - break; - } - - if (!(wsi->vhost->options & LWS_SERVER_OPTION_ONLY_RAW)) - opts |= LWS_ADOPT_HTTP; - else - opts = LWS_ADOPT_SOCKET; - - fd.sockfd = accept_fd; - if (!lws_adopt_descriptor_vhost(wsi->vhost, opts, fd, - NULL, NULL)) - /* already closed cleanly as necessary */ - return 1; - -#if LWS_POSIX - } while (pt->fds_count < context->fd_limit_per_thread - 1 && - lws_poll_listen_fd(&pt->fds[wsi->position_in_fds_table]) > 0); -#endif - return 0; - - default: - break; - } - - if (!lws_server_socket_service_ssl(wsi, accept_fd)) - return 0; - -fail: - lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS); - - return 1; -} - -LWS_VISIBLE int -lws_serve_http_file(struct lws *wsi, const char *file, const char *content_type, - const char *other_headers, int other_headers_len) -{ - static const char * const intermediates[] = { "private", "public" }; - struct lws_context *context = lws_get_context(wsi); - struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi]; -#if defined(LWS_WITH_RANGES) - struct lws_range_parsing *rp = &wsi->u.http.range; -#endif - char cache_control[50], *cc = "no-store"; - unsigned char *response = pt->serv_buf + LWS_PRE; - unsigned char *p = response; - unsigned char *end = p + context->pt_serv_buf_size - LWS_PRE; - lws_filepos_t computed_total_content_length; - int ret = 0, cclen = 8, n = HTTP_STATUS_OK; - lws_fop_flags_t fflags = LWS_O_RDONLY; -#if defined(LWS_WITH_RANGES) - int ranges; -#endif - const struct lws_plat_file_ops *fops; - const char *vpath; - - /* - * We either call the platform fops .open with first arg platform fops, - * or we call fops_zip .open with first arg platform fops, and fops_zip - * open will decide whether to switch to fops_zip or stay with fops_def. - * - * If wsi->u.http.fop_fd is already set, the caller already opened it - */ - if (!wsi->u.http.fop_fd) { - fops = lws_vfs_select_fops(wsi->context->fops, file, &vpath); - fflags |= lws_vfs_prepare_flags(wsi); - wsi->u.http.fop_fd = fops->LWS_FOP_OPEN(wsi->context->fops, - file, vpath, &fflags); - if (!wsi->u.http.fop_fd) { - lwsl_err("Unable to open '%s'\n", file); - - return -1; - } - } - wsi->u.http.filelen = lws_vfs_get_length(wsi->u.http.fop_fd); - computed_total_content_length = wsi->u.http.filelen; - -#if defined(LWS_WITH_RANGES) - ranges = lws_ranges_init(wsi, rp, wsi->u.http.filelen); - - lwsl_debug("Range count %d\n", ranges); - /* - * no ranges -> 200; - * 1 range -> 206 + Content-Type: normal; Content-Range; - * more -> 206 + Content-Type: multipart/byteranges - * Repeat the true Content-Type in each multipart header - * along with Content-Range - */ - if (ranges < 0) { - /* it means he expressed a range in Range:, but it was illegal */ - lws_return_http_status(wsi, HTTP_STATUS_REQ_RANGE_NOT_SATISFIABLE, - NULL); - if (lws_http_transaction_completed(wsi)) - return -1; /* <0 means just hang up */ - - lws_vfs_file_close(&wsi->u.http.fop_fd); - - return 0; /* == 0 means we dealt with the transaction complete */ - } - if (ranges) - n = HTTP_STATUS_PARTIAL_CONTENT; -#endif - - if (lws_add_http_header_status(wsi, n, &p, end)) - return -1; - - if ((wsi->u.http.fop_fd->flags & (LWS_FOP_FLAG_COMPR_ACCEPTABLE_GZIP | - LWS_FOP_FLAG_COMPR_IS_GZIP)) == - (LWS_FOP_FLAG_COMPR_ACCEPTABLE_GZIP | LWS_FOP_FLAG_COMPR_IS_GZIP)) { - if (lws_add_http_header_by_token(wsi, - WSI_TOKEN_HTTP_CONTENT_ENCODING, - (unsigned char *)"gzip", 4, &p, end)) - return -1; - lwsl_info("file is being provided in gzip\n"); - } - - if ( -#if defined(LWS_WITH_RANGES) - ranges < 2 && -#endif - content_type && content_type[0]) - if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE, - (unsigned char *)content_type, - strlen(content_type), &p, end)) - return -1; - -#if defined(LWS_WITH_RANGES) - if (ranges >= 2) { /* multipart byteranges */ - strncpy(wsi->u.http.multipart_content_type, content_type, - sizeof(wsi->u.http.multipart_content_type) - 1); - wsi->u.http.multipart_content_type[ - sizeof(wsi->u.http.multipart_content_type) - 1] = '\0'; - if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE, - (unsigned char *)"multipart/byteranges; boundary=_lws", - 20, &p, end)) - return -1; - - /* - * our overall content length has to include - * - * - (n + 1) x "_lws\r\n" - * - n x Content-Type: xxx/xxx\r\n - * - n x Content-Range: bytes xxx-yyy/zzz\r\n - * - n x /r/n - * - the actual payloads (aggregated in rp->agg) - * - * Precompute it for the main response header - */ - - computed_total_content_length = (lws_filepos_t)rp->agg + - 6 /* final _lws\r\n */; - - lws_ranges_reset(rp); - while (lws_ranges_next(rp)) { - n = lws_snprintf(cache_control, sizeof(cache_control), - "bytes %llu-%llu/%llu", - rp->start, rp->end, rp->extent); - - computed_total_content_length += - 6 /* header _lws\r\n */ + - /* Content-Type: xxx/xxx\r\n */ - 14 + strlen(content_type) + 2 + - /* Content-Range: xxxx\r\n */ - 15 + n + 2 + - 2; /* /r/n */ - } - - lws_ranges_reset(rp); - lws_ranges_next(rp); - } - - if (ranges == 1) { - computed_total_content_length = (lws_filepos_t)rp->agg; - n = lws_snprintf(cache_control, sizeof(cache_control), - "bytes %llu-%llu/%llu", - rp->start, rp->end, rp->extent); - - if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_RANGE, - (unsigned char *)cache_control, - n, &p, end)) - return -1; - } - - wsi->u.http.range.inside = 0; - - if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_ACCEPT_RANGES, - (unsigned char *)"bytes", 5, &p, end)) - return -1; -#endif - - if (!wsi->sending_chunked) { - if (lws_add_http_header_content_length(wsi, - computed_total_content_length, - &p, end)) - return -1; - } else { - if (lws_add_http_header_by_token(wsi, - WSI_TOKEN_HTTP_TRANSFER_ENCODING, - (unsigned char *)"chunked", - 7, &p, end)) - return -1; - } - - if (wsi->cache_secs && wsi->cache_reuse) { - if (wsi->cache_revalidate) { - cc = cache_control; - cclen = sprintf(cache_control, "%s max-age: %u", - intermediates[wsi->cache_intermediaries], - wsi->cache_secs); - } else { - cc = "no-cache"; - cclen = 8; - } - } - - if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CACHE_CONTROL, - (unsigned char *)cc, cclen, &p, end)) - return -1; - - if (wsi->u.http.connection_type == HTTP_CONNECTION_KEEP_ALIVE) - if (lws_add_http_header_by_token(wsi, WSI_TOKEN_CONNECTION, - (unsigned char *)"keep-alive", 10, &p, end)) - return -1; - - if (other_headers) { - if ((end - p) < other_headers_len) - return -1; - memcpy(p, other_headers, other_headers_len); - p += other_headers_len; - } - - if (lws_finalize_http_header(wsi, &p, end)) - return -1; - - ret = lws_write(wsi, response, p - response, LWS_WRITE_HTTP_HEADERS); - if (ret != (p - response)) { - lwsl_err("_write returned %d from %ld\n", ret, - (long)(p - response)); - return -1; - } - - wsi->u.http.filepos = 0; - wsi->state = LWSS_HTTP_ISSUING_FILE; - - lws_callback_on_writable(wsi); - - return 0; -} - -int -lws_interpret_incoming_packet(struct lws *wsi, unsigned char **buf, size_t len) -{ - int m; - - lwsl_parser("%s: received %d byte packet\n", __func__, (int)len); -#if 0 - lwsl_hexdump(*buf, len); -#endif - - /* let the rx protocol state machine have as much as it needs */ - - while (len) { - /* - * we were accepting input but now we stopped doing so - */ - if (wsi->rxflow_bitmap) { - lws_rxflow_cache(wsi, *buf, 0, len); - lwsl_parser("%s: cached %ld\n", __func__, (long)len); - return 1; - } - - if (wsi->u.ws.rx_draining_ext) { - m = lws_rx_sm(wsi, 0); - if (m < 0) - return -1; - continue; - } - - /* account for what we're using in rxflow buffer */ - if (wsi->rxflow_buffer) { - wsi->rxflow_pos++; - if (wsi->rxflow_pos > wsi->rxflow_len) { - lwsl_err("bumped rxflow buffer too far (%d / %d)", wsi->rxflow_pos, wsi->rxflow_len); - assert(0); - } - } - - /* consume payload bytes efficiently */ - if (wsi->lws_rx_parse_state == - LWS_RXPS_PAYLOAD_UNTIL_LENGTH_EXHAUSTED) { - m = lws_payload_until_length_exhausted(wsi, buf, &len); - if (wsi->rxflow_buffer) - wsi->rxflow_pos += m; - } - - if (wsi->rxflow_buffer && wsi->rxflow_pos == wsi->rxflow_len) { - lwsl_debug("%s: %p flow buf: drained\n", __func__, wsi); - lws_free_set_NULL(wsi->rxflow_buffer); - /* having drained the rxflow buffer, can rearm POLLIN */ -#ifdef LWS_NO_SERVER - m = -#endif - _lws_rx_flow_control(wsi); - /* m ignored, needed for NO_SERVER case */ - } - - /* process the byte */ - m = lws_rx_sm(wsi, *(*buf)++); - if (m < 0) - return -1; - len--; - } - - lwsl_parser("%s: exit with %d unused\n", __func__, (int)len); - - return 0; -} - -LWS_VISIBLE void -lws_server_get_canonical_hostname(struct lws_context *context, - struct lws_context_creation_info *info) -{ - if (lws_check_opt(info->options, - LWS_SERVER_OPTION_SKIP_SERVER_CANONICAL_NAME)) - return; -#if LWS_POSIX && !defined(LWS_WITH_ESP32) - /* find canonical hostname */ - gethostname((char *)context->canonical_hostname, - sizeof(context->canonical_hostname) - 1); - - lwsl_info(" canonical_hostname = %s\n", context->canonical_hostname); -#else - (void)context; -#endif -} - - -LWS_VISIBLE LWS_EXTERN int -lws_chunked_html_process(struct lws_process_html_args *args, - struct lws_process_html_state *s) -{ - char *sp, buffer[32]; - const char *pc; - int old_len, n; - - /* do replacements */ - sp = args->p; - old_len = args->len; - args->len = 0; - s->start = sp; - while (sp < args->p + old_len) { - - if (args->len + 7 >= args->max_len) { - lwsl_err("Used up interpret padding\n"); - return -1; - } - - if ((!s->pos && *sp == '$') || s->pos) { - int hits = 0, hit = 0; - - if (!s->pos) - s->start = sp; - s->swallow[s->pos++] = *sp; - if (s->pos == sizeof(s->swallow) - 1) - goto skip; - for (n = 0; n < s->count_vars; n++) - if (!strncmp(s->swallow, s->vars[n], s->pos)) { - hits++; - hit = n; - } - if (!hits) { -skip: - s->swallow[s->pos] = '\0'; - memcpy(s->start, s->swallow, s->pos); - args->len++; - s->pos = 0; - sp = s->start + 1; - continue; - } - if (hits == 1 && s->pos == strlen(s->vars[hit])) { - pc = s->replace(s->data, hit); - if (!pc) - pc = "NULL"; - n = strlen(pc); - s->swallow[s->pos] = '\0'; - if (n != s->pos) { - memmove(s->start + n, - s->start + s->pos, - old_len - (sp - args->p)); - old_len += (n - s->pos) + 1; - } - memcpy(s->start, pc, n); - args->len++; - sp = s->start + 1; - - s->pos = 0; - } - sp++; - continue; - } - - args->len++; - sp++; - } - - /* no space left for final chunk trailer */ - if (args->final && args->len + 7 >= args->max_len) - return -1; - - n = sprintf(buffer, "%X\x0d\x0a", args->len); - - args->p -= n; - memcpy(args->p, buffer, n); - args->len += n; - - if (args->final) { - sp = args->p + args->len; - *sp++ = '\x0d'; - *sp++ = '\x0a'; - *sp++ = '0'; - *sp++ = '\x0d'; - *sp++ = '\x0a'; - *sp++ = '\x0d'; - *sp++ = '\x0a'; - args->len += 7; - } else { - sp = args->p + args->len; - *sp++ = '\x0d'; - *sp++ = '\x0a'; - args->len += 2; - } - - return 0; -} |