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Diffstat (limited to 'thirdparty/libwebsockets/client/client.c')
-rw-r--r--thirdparty/libwebsockets/client/client.c1304
1 files changed, 0 insertions, 1304 deletions
diff --git a/thirdparty/libwebsockets/client/client.c b/thirdparty/libwebsockets/client/client.c
deleted file mode 100644
index ded4e4bf0b..0000000000
--- a/thirdparty/libwebsockets/client/client.c
+++ /dev/null
@@ -1,1304 +0,0 @@
-/*
- * libwebsockets - small server side websockets and web server implementation
- *
- * Copyright (C) 2010-2014 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"
-
-int
-lws_handshake_client(struct lws *wsi, unsigned char **buf, size_t len)
-{
- int m;
-
- switch (wsi->mode) {
- case LWSCM_WSCL_WAITING_PROXY_REPLY:
- case LWSCM_WSCL_ISSUE_HANDSHAKE:
- case LWSCM_WSCL_WAITING_SERVER_REPLY:
- case LWSCM_WSCL_WAITING_EXTENSION_CONNECT:
- case LWSCM_WS_CLIENT:
- while (len) {
- /*
- * we were accepting input but now we stopped doing so
- */
- if (lws_is_flowcontrolled(wsi)) {
- lwsl_debug("%s: caching %ld\n", __func__, (long)len);
- lws_rxflow_cache(wsi, *buf, 0, len);
- return 0;
- }
- if (wsi->u.ws.rx_draining_ext) {
-#if !defined(LWS_NO_CLIENT)
- if (wsi->mode == LWSCM_WS_CLIENT)
- m = lws_client_rx_sm(wsi, 0);
- else
-#endif
- 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 (lws_client_rx_sm(wsi, *(*buf)++)) {
- lwsl_debug("client_rx_sm exited\n");
- return -1;
- }
- len--;
- }
- lwsl_debug("%s: finished with %ld\n", __func__, (long)len);
- return 0;
- default:
- break;
- }
-
- return 0;
-}
-
-LWS_VISIBLE LWS_EXTERN void
-lws_client_http_body_pending(struct lws *wsi, int something_left_to_send)
-{
- wsi->client_http_body_pending = !!something_left_to_send;
-}
-
-int
-lws_client_socket_service(struct lws_context *context, struct lws *wsi,
- struct lws_pollfd *pollfd)
-{
- struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
- char *p = (char *)&pt->serv_buf[0];
- const char *cce = NULL;
- unsigned char c;
- char *sb = p;
- int n = 0;
- ssize_t len = 0;
-#if defined(LWS_WITH_SOCKS5)
- char conn_mode = 0, pending_timeout = 0;
-#endif
-
- switch (wsi->mode) {
-
- case LWSCM_WSCL_WAITING_CONNECT:
-
- /*
- * we are under PENDING_TIMEOUT_SENT_CLIENT_HANDSHAKE
- * timeout protection set in client-handshake.c
- */
-
- if (!lws_client_connect_2(wsi)) {
- /* closed */
- lwsl_client("closed\n");
- return -1;
- }
-
- /* either still pending connection, or changed mode */
- return 0;
-
-#if defined(LWS_WITH_SOCKS5)
- /* SOCKS Greeting Reply */
- case LWSCM_WSCL_WAITING_SOCKS_GREETING_REPLY:
- case LWSCM_WSCL_WAITING_SOCKS_AUTH_REPLY:
- case LWSCM_WSCL_WAITING_SOCKS_CONNECT_REPLY:
-
- /* handle proxy hung up on us */
-
- if (pollfd->revents & LWS_POLLHUP) {
- lwsl_warn("SOCKS connection %p (fd=%d) dead\n",
- (void *)wsi, pollfd->fd);
- goto bail3;
- }
-
- n = recv(wsi->desc.sockfd, sb, context->pt_serv_buf_size, 0);
- if (n < 0) {
- if (LWS_ERRNO == LWS_EAGAIN) {
- lwsl_debug("SOCKS read EAGAIN, retrying\n");
- return 0;
- }
- lwsl_err("ERROR reading from SOCKS socket\n");
- goto bail3;
- }
-
- switch (wsi->mode) {
-
- case LWSCM_WSCL_WAITING_SOCKS_GREETING_REPLY:
- if (pt->serv_buf[0] != SOCKS_VERSION_5)
- goto socks_reply_fail;
-
- if (pt->serv_buf[1] == SOCKS_AUTH_NO_AUTH) {
- lwsl_client("SOCKS greeting reply: No Auth Method\n");
- socks_generate_msg(wsi, SOCKS_MSG_CONNECT, &len);
- conn_mode = LWSCM_WSCL_WAITING_SOCKS_CONNECT_REPLY;
- pending_timeout = PENDING_TIMEOUT_AWAITING_SOCKS_CONNECT_REPLY;
- goto socks_send;
- }
-
- if (pt->serv_buf[1] == SOCKS_AUTH_USERNAME_PASSWORD) {
- lwsl_client("SOCKS greeting reply: User/Pw Method\n");
- socks_generate_msg(wsi, SOCKS_MSG_USERNAME_PASSWORD, &len);
- conn_mode = LWSCM_WSCL_WAITING_SOCKS_AUTH_REPLY;
- pending_timeout = PENDING_TIMEOUT_AWAITING_SOCKS_AUTH_REPLY;
- goto socks_send;
- }
- goto socks_reply_fail;
-
- case LWSCM_WSCL_WAITING_SOCKS_AUTH_REPLY:
- if (pt->serv_buf[0] != SOCKS_SUBNEGOTIATION_VERSION_1 ||
- pt->serv_buf[1] != SOCKS_SUBNEGOTIATION_STATUS_SUCCESS)
- goto socks_reply_fail;
-
- lwsl_client("SOCKS password OK, sending connect\n");
- socks_generate_msg(wsi, SOCKS_MSG_CONNECT, &len);
- conn_mode = LWSCM_WSCL_WAITING_SOCKS_CONNECT_REPLY;
- pending_timeout = PENDING_TIMEOUT_AWAITING_SOCKS_CONNECT_REPLY;
-socks_send:
- n = send(wsi->desc.sockfd, (char *)pt->serv_buf, len,
- MSG_NOSIGNAL);
- if (n < 0) {
- lwsl_debug("ERROR writing to socks proxy\n");
- goto bail3;
- }
-
- lws_set_timeout(wsi, pending_timeout, AWAITING_TIMEOUT);
- wsi->mode = conn_mode;
- break;
-
-socks_reply_fail:
- lwsl_notice("socks reply: v%d, err %d\n",
- pt->serv_buf[0], pt->serv_buf[1]);
- goto bail3;
-
- case LWSCM_WSCL_WAITING_SOCKS_CONNECT_REPLY:
- if (pt->serv_buf[0] != SOCKS_VERSION_5 ||
- pt->serv_buf[1] != SOCKS_REQUEST_REPLY_SUCCESS)
- goto socks_reply_fail;
-
- lwsl_client("socks connect OK\n");
-
- /* free stash since we are done with it */
- lws_free_set_NULL(wsi->u.hdr.stash);
- if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS,
- wsi->vhost->socks_proxy_address))
- goto bail3;
-
- wsi->c_port = wsi->vhost->socks_proxy_port;
-
- /* clear his proxy connection timeout */
- lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
- goto start_ws_handshake;
- }
- break;
-#endif
-
- case LWSCM_WSCL_WAITING_PROXY_REPLY:
-
- /* handle proxy hung up on us */
-
- if (pollfd->revents & LWS_POLLHUP) {
-
- lwsl_warn("Proxy connection %p (fd=%d) dead\n",
- (void *)wsi, pollfd->fd);
-
- goto bail3;
- }
-
- n = recv(wsi->desc.sockfd, sb, context->pt_serv_buf_size, 0);
- if (n < 0) {
- if (LWS_ERRNO == LWS_EAGAIN) {
- lwsl_debug("Proxy read returned EAGAIN... retrying\n");
- return 0;
- }
- lwsl_err("ERROR reading from proxy socket\n");
- goto bail3;
- }
-
- pt->serv_buf[13] = '\0';
- if (strcmp(sb, "HTTP/1.0 200 ") &&
- strcmp(sb, "HTTP/1.1 200 ")) {
- lwsl_err("ERROR proxy: %s\n", sb);
- goto bail3;
- }
-
- /* clear his proxy connection timeout */
-
- lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
-
- /* fallthru */
-
- case LWSCM_WSCL_ISSUE_HANDSHAKE:
-
- /*
- * we are under PENDING_TIMEOUT_SENT_CLIENT_HANDSHAKE
- * timeout protection set in client-handshake.c
- *
- * take care of our lws_callback_on_writable
- * happening at a time when there's no real connection yet
- */
-#if defined(LWS_WITH_SOCKS5)
-start_ws_handshake:
-#endif
- if (lws_change_pollfd(wsi, LWS_POLLOUT, 0))
- return -1;
-
-#ifdef LWS_OPENSSL_SUPPORT
- /* we can retry this... just cook the SSL BIO the first time */
-
- if (wsi->use_ssl && !wsi->ssl &&
- lws_ssl_client_bio_create(wsi) < 0) {
- cce = "bio_create failed";
- goto bail3;
- }
-
- if (wsi->use_ssl) {
- n = lws_ssl_client_connect1(wsi);
- if (!n)
- return 0;
- if (n < 0) {
- cce = "lws_ssl_client_connect1 failed";
- goto bail3;
- }
- } else
- wsi->ssl = NULL;
-
- /* fallthru */
-
- case LWSCM_WSCL_WAITING_SSL:
-
- if (wsi->use_ssl) {
- n = lws_ssl_client_connect2(wsi);
- if (!n)
- return 0;
- if (n < 0) {
- cce = "lws_ssl_client_connect2 failed";
- goto bail3;
- }
- } else
- wsi->ssl = NULL;
-#endif
-
- wsi->mode = LWSCM_WSCL_ISSUE_HANDSHAKE2;
- lws_set_timeout(wsi, PENDING_TIMEOUT_AWAITING_CLIENT_HS_SEND,
- context->timeout_secs);
-
- /* fallthru */
-
- case LWSCM_WSCL_ISSUE_HANDSHAKE2:
- p = lws_generate_client_handshake(wsi, p);
- if (p == NULL) {
- if (wsi->mode == LWSCM_RAW)
- return 0;
-
- lwsl_err("Failed to generate handshake for client\n");
- lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
- return 0;
- }
-
- /* send our request to the server */
- lws_latency_pre(context, wsi);
-
- n = lws_ssl_capable_write(wsi, (unsigned char *)sb, p - sb);
- lws_latency(context, wsi, "send lws_issue_raw", n,
- n == p - sb);
- switch (n) {
- case LWS_SSL_CAPABLE_ERROR:
- lwsl_debug("ERROR writing to client socket\n");
- lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
- return 0;
- case LWS_SSL_CAPABLE_MORE_SERVICE:
- lws_callback_on_writable(wsi);
- break;
- }
-
- if (wsi->client_http_body_pending) {
- wsi->mode = LWSCM_WSCL_ISSUE_HTTP_BODY;
- lws_set_timeout(wsi, PENDING_TIMEOUT_CLIENT_ISSUE_PAYLOAD,
- context->timeout_secs);
- /* user code must ask for writable callback */
- break;
- }
-
- goto client_http_body_sent;
-
- case LWSCM_WSCL_ISSUE_HTTP_BODY:
- if (wsi->client_http_body_pending) {
- lws_set_timeout(wsi, PENDING_TIMEOUT_CLIENT_ISSUE_PAYLOAD,
- context->timeout_secs);
- /* user code must ask for writable callback */
- break;
- }
-client_http_body_sent:
- wsi->u.hdr.parser_state = WSI_TOKEN_NAME_PART;
- wsi->u.hdr.lextable_pos = 0;
- wsi->mode = LWSCM_WSCL_WAITING_SERVER_REPLY;
- lws_set_timeout(wsi, PENDING_TIMEOUT_AWAITING_SERVER_RESPONSE,
- context->timeout_secs);
- break;
-
- case LWSCM_WSCL_WAITING_SERVER_REPLY:
- /*
- * handle server hanging up on us...
- * but if there is POLLIN waiting, handle that first
- */
- if ((pollfd->revents & (LWS_POLLIN | LWS_POLLHUP)) ==
- LWS_POLLHUP) {
-
- lwsl_debug("Server connection %p (fd=%d) dead\n",
- (void *)wsi, pollfd->fd);
- cce = "Peer hung up";
- goto bail3;
- }
-
- if (!(pollfd->revents & LWS_POLLIN))
- break;
-
- /* interpret the server response
- *
- * HTTP/1.1 101 Switching Protocols
- * Upgrade: websocket
- * Connection: Upgrade
- * Sec-WebSocket-Accept: me89jWimTRKTWwrS3aRrL53YZSo=
- * Sec-WebSocket-Nonce: AQIDBAUGBwgJCgsMDQ4PEC==
- * Sec-WebSocket-Protocol: chat
- *
- * we have to take some care here to only take from the
- * socket bytewise. The browser may (and has been seen to
- * in the case that onopen() performs websocket traffic)
- * coalesce both handshake response and websocket traffic
- * in one packet, since at that point the connection is
- * definitively ready from browser pov.
- */
- len = 1;
- while (wsi->u.hdr.parser_state != WSI_PARSING_COMPLETE &&
- len > 0) {
- n = lws_ssl_capable_read(wsi, &c, 1);
- lws_latency(context, wsi, "send lws_issue_raw", n,
- n == 1);
- switch (n) {
- case 0:
- case LWS_SSL_CAPABLE_ERROR:
- cce = "read failed";
- goto bail3;
- case LWS_SSL_CAPABLE_MORE_SERVICE:
- return 0;
- }
-
- if (lws_parse(wsi, c)) {
- lwsl_warn("problems parsing header\n");
- goto bail3;
- }
- }
-
- /*
- * hs may also be coming in multiple packets, there is a 5-sec
- * libwebsocket timeout still active here too, so if parsing did
- * not complete just wait for next packet coming in this state
- */
- if (wsi->u.hdr.parser_state != WSI_PARSING_COMPLETE)
- break;
-
- /*
- * otherwise deal with the handshake. If there's any
- * packet traffic already arrived we'll trigger poll() again
- * right away and deal with it that way
- */
- return lws_client_interpret_server_handshake(wsi);
-
-bail3:
- lwsl_info("closing conn at LWS_CONNMODE...SERVER_REPLY\n");
- if (cce)
- lwsl_info("reason: %s\n", cce);
- wsi->protocol->callback(wsi,
- LWS_CALLBACK_CLIENT_CONNECTION_ERROR,
- wsi->user_space, (void *)cce, cce ? strlen(cce) : 0);
- wsi->already_did_cce = 1;
- lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
- return -1;
-
- case LWSCM_WSCL_WAITING_EXTENSION_CONNECT:
- lwsl_ext("LWSCM_WSCL_WAITING_EXTENSION_CONNECT\n");
- break;
-
- case LWSCM_WSCL_PENDING_CANDIDATE_CHILD:
- lwsl_ext("LWSCM_WSCL_PENDING_CANDIDATE_CHILD\n");
- break;
- default:
- break;
- }
-
- return 0;
-}
-
-/*
- * In-place str to lower case
- */
-
-static void
-strtolower(char *s)
-{
- while (*s) {
-#ifdef LWS_PLAT_OPTEE
- int tolower_optee(int c);
- *s = tolower_optee((int)*s);
-#else
- *s = tolower((int)*s);
-#endif
- s++;
- }
-}
-
-int LWS_WARN_UNUSED_RESULT
-lws_http_transaction_completed_client(struct lws *wsi)
-{
- lwsl_debug("%s: wsi %p\n", __func__, wsi);
- /* if we can't go back to accept new headers, drop the connection */
- if (wsi->u.http.connection_type != HTTP_CONNECTION_KEEP_ALIVE) {
- lwsl_info("%s: %p: close connection\n", __func__, wsi);
- return 1;
- }
-
- /* we don't support chained client connections yet */
- return 1;
-#if 0
- /* otherwise set ourselves up ready to go again */
- wsi->state = LWSS_CLIENT_HTTP_ESTABLISHED;
- wsi->mode = LWSCM_HTTP_CLIENT_ACCEPTED;
- wsi->u.http.rx_content_length = 0;
- wsi->hdr_parsing_completed = 0;
-
- /* He asked for it to stay alive indefinitely */
- lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
-
- /*
- * As client, nothing new is going to come until we ask for it
- * we can drop the ah, if any
- */
- if (wsi->u.hdr.ah) {
- lws_header_table_force_to_detachable_state(wsi);
- lws_header_table_detach(wsi, 0);
- }
-
- /* 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;
-#endif
-}
-
-LWS_VISIBLE LWS_EXTERN unsigned int
-lws_http_client_http_response(struct lws *wsi)
-{
- if (!wsi->u.http.ah)
- return 0;
-
- return wsi->u.http.ah->http_response;
-}
-
-int
-lws_client_interpret_server_handshake(struct lws *wsi)
-{
- int n, len, okay = 0, port = 0, ssl = 0;
- int close_reason = LWS_CLOSE_STATUS_PROTOCOL_ERR;
- struct lws_context *context = wsi->context;
- const char *pc, *prot, *ads = NULL, *path, *cce = NULL;
- struct allocated_headers *ah = NULL;
- char *p, *q;
- char new_path[300];
-#ifndef LWS_NO_EXTENSIONS
- struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
- char *sb = (char *)&pt->serv_buf[0];
- const struct lws_ext_options *opts;
- const struct lws_extension *ext;
- char ext_name[128];
- const char *c, *a;
- char ignore;
- int more = 1;
- void *v;
-#endif
- if (wsi->u.hdr.stash)
- lws_free_set_NULL(wsi->u.hdr.stash);
-
- ah = wsi->u.hdr.ah;
- if (!wsi->do_ws) {
- /* we are being an http client...
- */
- lws_union_transition(wsi, LWSCM_HTTP_CLIENT_ACCEPTED);
- wsi->state = LWSS_CLIENT_HTTP_ESTABLISHED;
- wsi->u.http.ah = ah;
- ah->http_response = 0;
- }
-
- /*
- * well, what the server sent looked reasonable for syntax.
- * Now let's confirm it sent all the necessary headers
- *
- * http (non-ws) client will expect something like this
- *
- * HTTP/1.0.200
- * server:.libwebsockets
- * content-type:.text/html
- * content-length:.17703
- * set-cookie:.test=LWS_1456736240_336776_COOKIE;Max-Age=360000
- *
- *
- *
- */
-
- wsi->u.http.connection_type = HTTP_CONNECTION_KEEP_ALIVE;
- p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP);
- if (wsi->do_ws && !p) {
- lwsl_info("no URI\n");
- cce = "HS: URI missing";
- goto bail3;
- }
- if (!p) {
- p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP1_0);
- wsi->u.http.connection_type = HTTP_CONNECTION_CLOSE;
- }
- if (!p) {
- cce = "HS: URI missing";
- lwsl_info("no URI\n");
- goto bail3;
- }
- n = atoi(p);
- if (ah)
- ah->http_response = n;
-
- if (n == 301 || n == 302 || n == 303 || n == 307 || n == 308) {
- p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_LOCATION);
- if (!p) {
- cce = "HS: Redirect code but no Location";
- goto bail3;
- }
-
- /* Relative reference absolute path */
- if (p[0] == '/')
- {
-#ifdef LWS_OPENSSL_SUPPORT
- ssl = wsi->use_ssl;
-#endif
- ads = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS);
- port = wsi->c_port;
- path = p + 1; /* +1 as lws_client_reset expects leading / to be omitted */
- }
- /* Absolute (Full) URI */
- else if (strchr(p, ':'))
- {
- if (lws_parse_uri(p, &prot, &ads, &port, &path)) {
- cce = "HS: URI did not parse";
- goto bail3;
- }
-
- if (!strcmp(prot, "wss") || !strcmp(prot, "https"))
- ssl = 1;
- }
- /* Relative reference relative path */
- else
- {
- /* This doesn't try to calculate an absolute path, that will be left to the server */
-#ifdef LWS_OPENSSL_SUPPORT
- ssl = wsi->use_ssl;
-#endif
- ads = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS);
- port = wsi->c_port;
- path = new_path + 1; /* +1 as lws_client_reset expects leading / to be omitted */
- strncpy(new_path, lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_URI), sizeof(new_path));
- new_path[sizeof(new_path) - 1] = '\0';
- q = strrchr(new_path, '/');
- if (q)
- {
- strncpy(q + 1, p, sizeof(new_path) - (q - new_path) - 1);
- new_path[sizeof(new_path) - 1] = '\0';
- }
- else
- {
- path = p;
- }
- }
-
-#ifdef LWS_OPENSSL_SUPPORT
- if (wsi->use_ssl && !ssl) {
- cce = "HS: Redirect attempted SSL downgrade";
- goto bail3;
- }
-#endif
-
- if (!lws_client_reset(&wsi, ssl, ads, port, path, ads)) {
- /* there are two ways to fail out with NULL return...
- * simple, early problem where the wsi is intact, or
- * we went through with the reconnect attempt and the
- * wsi is already closed. In the latter case, the wsi
- * has beet set to NULL additionally.
- */
- lwsl_err("Redirect failed\n");
- cce = "HS: Redirect failed";
- if (wsi)
- goto bail3;
-
- return 1;
- }
- return 0;
- }
-
- if (!wsi->do_ws) {
-
-#ifdef LWS_WITH_HTTP_PROXY
- wsi->perform_rewrite = 0;
- if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE)) {
- if (!strncmp(lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE),
- "text/html", 9))
- wsi->perform_rewrite = 1;
- }
-#endif
-
- /* allocate the per-connection user memory (if any) */
- if (lws_ensure_user_space(wsi)) {
- lwsl_err("Problem allocating wsi user mem\n");
- cce = "HS: OOM";
- goto bail2;
- }
-
- /* he may choose to send us stuff in chunked transfer-coding */
- wsi->chunked = 0;
- wsi->chunk_remaining = 0; /* ie, next thing is chunk size */
- if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_TRANSFER_ENCODING)) {
- wsi->chunked = !strcmp(lws_hdr_simple_ptr(wsi,
- WSI_TOKEN_HTTP_TRANSFER_ENCODING),
- "chunked");
- /* first thing is hex, after payload there is crlf */
- wsi->chunk_parser = ELCP_HEX;
- }
-
- if (lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_CONTENT_LENGTH)) {
- wsi->u.http.rx_content_length =
- atoll(lws_hdr_simple_ptr(wsi,
- WSI_TOKEN_HTTP_CONTENT_LENGTH));
- lwsl_notice("%s: incoming content length %llu\n", __func__,
- (unsigned long long)wsi->u.http.rx_content_length);
- wsi->u.http.rx_content_remain = wsi->u.http.rx_content_length;
- } else /* can't do 1.1 without a content length or chunked */
- if (!wsi->chunked)
- wsi->u.http.connection_type = HTTP_CONNECTION_CLOSE;
-
- /*
- * we seem to be good to go, give client last chance to check
- * headers and OK it
- */
- if (wsi->protocol->callback(wsi, LWS_CALLBACK_CLIENT_FILTER_PRE_ESTABLISH,
- wsi->user_space, NULL, 0)) {
-
- cce = "HS: disallowed by client filter";
- goto bail2;
- }
-
- /* clear his proxy connection timeout */
- lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
-
- wsi->rxflow_change_to = LWS_RXFLOW_ALLOW;
-
- /* call him back to inform him he is up */
- if (wsi->protocol->callback(wsi,
- LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP,
- wsi->user_space, NULL, 0)) {
- cce = "HS: disallowed at ESTABLISHED";
- goto bail3;
- }
-
- /* free up his parsing allocations */
- lws_header_table_detach(wsi, 0);
-
- lwsl_notice("%s: client connection up\n", __func__);
-
- return 0;
- }
-
- if (p && !strncmp(p, "401", 3)) {
- lwsl_warn(
- "lws_client_handshake: got bad HTTP response '%s'\n", p);
- cce = "HS: ws upgrade unauthorized";
- goto bail3;
- }
-
- if (p && strncmp(p, "101", 3)) {
- lwsl_warn(
- "lws_client_handshake: got bad HTTP response '%s'\n", p);
- cce = "HS: ws upgrade response not 101";
- goto bail3;
- }
-
- if (lws_hdr_total_length(wsi, WSI_TOKEN_ACCEPT) == 0) {
- lwsl_info("no ACCEPT\n");
- cce = "HS: ACCEPT missing";
- goto bail3;
- }
-
- p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_UPGRADE);
- if (!p) {
- lwsl_info("no UPGRADE\n");
- cce = "HS: UPGRADE missing";
- goto bail3;
- }
- strtolower(p);
- if (strcmp(p, "websocket")) {
- lwsl_warn(
- "lws_client_handshake: got bad Upgrade header '%s'\n", p);
- cce = "HS: Upgrade to something other than websocket";
- goto bail3;
- }
-
- p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_CONNECTION);
- if (!p) {
- lwsl_info("no Connection hdr\n");
- cce = "HS: CONNECTION missing";
- goto bail3;
- }
- strtolower(p);
- if (strcmp(p, "upgrade")) {
- lwsl_warn("lws_client_int_s_hs: bad header %s\n", p);
- cce = "HS: UPGRADE malformed";
- goto bail3;
- }
-
- pc = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS);
- if (!pc) {
- lwsl_parser("lws_client_int_s_hs: no protocol list\n");
- } else
- lwsl_parser("lws_client_int_s_hs: protocol list '%s'\n", pc);
-
- /*
- * confirm the protocol the server wants to talk was in the list
- * of protocols we offered
- */
-
- len = lws_hdr_total_length(wsi, WSI_TOKEN_PROTOCOL);
- if (!len) {
- lwsl_info("lws_client_int_s_hs: WSI_TOKEN_PROTOCOL is null\n");
- /*
- * no protocol name to work from,
- * default to first protocol
- */
- n = 0;
- wsi->protocol = &wsi->vhost->protocols[0];
- goto check_extensions;
- }
-
- p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_PROTOCOL);
- len = strlen(p);
-
- while (pc && *pc && !okay) {
- if (!strncmp(pc, p, len) &&
- (pc[len] == ',' || pc[len] == '\0')) {
- okay = 1;
- continue;
- }
- while (*pc && *pc++ != ',')
- ;
- while (*pc && *pc == ' ')
- pc++;
- }
-
- if (!okay) {
- lwsl_err("lws_client_int_s_hs: got bad protocol %s\n", p);
- cce = "HS: PROTOCOL malformed";
- goto bail2;
- }
-
- /*
- * identify the selected protocol struct and set it
- */
- n = 0;
- wsi->protocol = NULL;
- while (wsi->vhost->protocols[n].callback && !wsi->protocol) {
- if (strcmp(p, wsi->vhost->protocols[n].name) == 0) {
- wsi->protocol = &wsi->vhost->protocols[n];
- break;
- }
- n++;
- }
-
- if (wsi->protocol == NULL) {
- lwsl_err("lws_client_int_s_hs: fail protocol %s\n", p);
- cce = "HS: Cannot match protocol";
- goto bail2;
- }
-
-check_extensions:
- /*
- * stitch protocol choice into the vh protocol linked list
- * We always insert ourselves at the start of the list
- *
- * X <-> B
- * X <-> pAn <-> pB
- */
- //lwsl_err("%s: pre insert vhost start wsi %p, that wsi prev == %p\n",
- // __func__,
- // wsi->vhost->same_vh_protocol_list[n],
- // wsi->same_vh_protocol_prev);
- wsi->same_vh_protocol_prev = /* guy who points to us */
- &wsi->vhost->same_vh_protocol_list[n];
- wsi->same_vh_protocol_next = /* old first guy is our next */
- wsi->vhost->same_vh_protocol_list[n];
- /* we become the new first guy */
- wsi->vhost->same_vh_protocol_list[n] = wsi;
-
- if (wsi->same_vh_protocol_next)
- /* old first guy points back to us now */
- wsi->same_vh_protocol_next->same_vh_protocol_prev =
- &wsi->same_vh_protocol_next;
-
-#ifndef LWS_NO_EXTENSIONS
- /* instantiate the accepted extensions */
-
- if (!lws_hdr_total_length(wsi, WSI_TOKEN_EXTENSIONS)) {
- lwsl_ext("no client extensions allowed by server\n");
- goto check_accept;
- }
-
- /*
- * break down the list of server accepted extensions
- * and go through matching them or identifying bogons
- */
-
- if (lws_hdr_copy(wsi, sb, context->pt_serv_buf_size, WSI_TOKEN_EXTENSIONS) < 0) {
- lwsl_warn("ext list from server failed to copy\n");
- cce = "HS: EXT: list too big";
- goto bail2;
- }
-
- c = sb;
- n = 0;
- ignore = 0;
- a = NULL;
- while (more) {
-
- if (*c && (*c != ',' && *c != '\t')) {
- if (*c == ';') {
- ignore = 1;
- if (!a)
- a = c + 1;
- }
- if (ignore || *c == ' ') {
- c++;
- continue;
- }
-
- ext_name[n] = *c++;
- if (n < sizeof(ext_name) - 1)
- n++;
- continue;
- }
- ext_name[n] = '\0';
- ignore = 0;
- if (!*c)
- more = 0;
- else {
- c++;
- if (!n)
- continue;
- }
-
- /* check we actually support it */
-
- lwsl_notice("checking client ext %s\n", ext_name);
-
- n = 0;
- ext = wsi->vhost->extensions;
- while (ext && ext->callback) {
- if (strcmp(ext_name, ext->name)) {
- ext++;
- continue;
- }
-
- n = 1;
- lwsl_notice("instantiating client ext %s\n", ext_name);
-
- /* instantiate the extension on this conn */
-
- wsi->active_extensions[wsi->count_act_ext] = ext;
-
- /* allow him to construct his ext instance */
-
- if (ext->callback(lws_get_context(wsi), ext, wsi,
- LWS_EXT_CB_CLIENT_CONSTRUCT,
- (void *)&wsi->act_ext_user[wsi->count_act_ext],
- (void *)&opts, 0)) {
- lwsl_info(" ext %s failed construction\n", ext_name);
- ext++;
- continue;
- }
-
- /*
- * allow the user code to override ext defaults if it
- * wants to
- */
- ext_name[0] = '\0';
- if (user_callback_handle_rxflow(wsi->protocol->callback,
- wsi, LWS_CALLBACK_WS_EXT_DEFAULTS,
- (char *)ext->name, ext_name,
- sizeof(ext_name))) {
- cce = "HS: EXT: failed setting defaults";
- goto bail2;
- }
-
- if (ext_name[0] &&
- lws_ext_parse_options(ext, wsi, wsi->act_ext_user[
- wsi->count_act_ext], opts, ext_name,
- strlen(ext_name))) {
- lwsl_err("%s: unable to parse user defaults '%s'",
- __func__, ext_name);
- cce = "HS: EXT: failed parsing defaults";
- goto bail2;
- }
-
- /*
- * give the extension the server options
- */
- if (a && lws_ext_parse_options(ext, wsi,
- wsi->act_ext_user[wsi->count_act_ext],
- opts, a, c - a)) {
- lwsl_err("%s: unable to parse remote def '%s'",
- __func__, a);
- cce = "HS: EXT: failed parsing options";
- goto bail2;
- }
-
- if (ext->callback(lws_get_context(wsi), ext, wsi,
- LWS_EXT_CB_OPTION_CONFIRM,
- wsi->act_ext_user[wsi->count_act_ext],
- NULL, 0)) {
- lwsl_err("%s: ext %s rejects server options %s",
- __func__, ext->name, a);
- cce = "HS: EXT: Rejects server options";
- goto bail2;
- }
-
- wsi->count_act_ext++;
-
- ext++;
- }
-
- if (n == 0) {
- lwsl_warn("Unknown ext '%s'!\n", ext_name);
- cce = "HS: EXT: unknown ext";
- goto bail2;
- }
-
- a = NULL;
- n = 0;
- }
-
-check_accept:
-#endif
-
- /*
- * Confirm his accept token is the one we precomputed
- */
-
- p = lws_hdr_simple_ptr(wsi, WSI_TOKEN_ACCEPT);
- if (strcmp(p, wsi->u.hdr.ah->initial_handshake_hash_base64)) {
- lwsl_warn("lws_client_int_s_hs: accept '%s' wrong vs '%s'\n", p,
- wsi->u.hdr.ah->initial_handshake_hash_base64);
- cce = "HS: Accept hash wrong";
- goto bail2;
- }
-
- /* allocate the per-connection user memory (if any) */
- if (lws_ensure_user_space(wsi)) {
- lwsl_err("Problem allocating wsi user mem\n");
- cce = "HS: OOM";
- goto bail2;
- }
-
- /*
- * we seem to be good to go, give client last chance to check
- * headers and OK it
- */
- if (wsi->protocol->callback(wsi, LWS_CALLBACK_CLIENT_FILTER_PRE_ESTABLISH,
- wsi->user_space, NULL, 0)) {
- cce = "HS: Rejected by filter cb";
- goto bail2;
- }
-
- /* clear his proxy connection timeout */
- lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
-
- /* free up his parsing allocations */
- lws_header_table_detach(wsi, 0);
-
- lws_union_transition(wsi, LWSCM_WS_CLIENT);
- wsi->state = LWSS_ESTABLISHED;
- lws_restart_ws_ping_pong_timer(wsi);
-
- wsi->rxflow_change_to = LWS_RXFLOW_ALLOW;
-
- /*
- * create the frame buffer for this connection according to the
- * size mentioned in the protocol definition. If 0 there, then
- * use a big default for compatibility
- */
- n = wsi->protocol->rx_buffer_size;
- if (!n)
- n = context->pt_serv_buf_size;
- n += LWS_PRE;
- wsi->u.ws.rx_ubuf = lws_malloc(n + 4 /* 0x0000ffff zlib */, "client frame buffer");
- if (!wsi->u.ws.rx_ubuf) {
- lwsl_err("Out of Mem allocating rx buffer %d\n", n);
- cce = "HS: OOM";
- goto bail2;
- }
- wsi->u.ws.rx_ubuf_alloc = n;
- lwsl_info("Allocating client RX buffer %d\n", n);
-
-#if !defined(LWS_WITH_ESP32)
- if (setsockopt(wsi->desc.sockfd, SOL_SOCKET, SO_SNDBUF, (const char *)&n,
- sizeof n)) {
- lwsl_warn("Failed to set SNDBUF to %d", n);
- cce = "HS: SO_SNDBUF failed";
- goto bail3;
- }
-#endif
-
- lwsl_debug("handshake OK for protocol %s\n", wsi->protocol->name);
-
- /* call him back to inform him he is up */
-
- if (wsi->protocol->callback(wsi, LWS_CALLBACK_CLIENT_ESTABLISHED,
- wsi->user_space, NULL, 0)) {
- cce = "HS: Rejected at CLIENT_ESTABLISHED";
- goto bail3;
- }
-#ifndef LWS_NO_EXTENSIONS
- /*
- * inform all extensions, not just active ones since they
- * already know
- */
- ext = wsi->vhost->extensions;
-
- while (ext && ext->callback) {
- v = NULL;
- for (n = 0; n < wsi->count_act_ext; n++)
- if (wsi->active_extensions[n] == ext)
- v = wsi->act_ext_user[n];
-
- ext->callback(context, ext, wsi,
- LWS_EXT_CB_ANY_WSI_ESTABLISHED, v, NULL, 0);
- ext++;
- }
-#endif
-
- return 0;
-
-bail3:
- close_reason = LWS_CLOSE_STATUS_NOSTATUS;
-
-bail2:
- if (wsi->protocol)
- wsi->protocol->callback(wsi, LWS_CALLBACK_CLIENT_CONNECTION_ERROR,
- wsi->user_space, (void *)cce,
- (unsigned int)strlen(cce));
- wsi->already_did_cce = 1;
-
- lwsl_info("closing connection due to bail2 connection error\n");
-
- /* closing will free up his parsing allocations */
- lws_close_free_wsi(wsi, close_reason);
-
- return 1;
-}
-
-
-char *
-lws_generate_client_handshake(struct lws *wsi, char *pkt)
-{
- char buf[128], hash[20], key_b64[40], *p = pkt;
- struct lws_context *context = wsi->context;
- const char *meth;
- int n;
-#ifndef LWS_NO_EXTENSIONS
- const struct lws_extension *ext;
- int ext_count = 0;
-#endif
- const char *pp = lws_hdr_simple_ptr(wsi,
- _WSI_TOKEN_CLIENT_SENT_PROTOCOLS);
-
- meth = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_METHOD);
- if (!meth) {
- meth = "GET";
- wsi->do_ws = 1;
- } else {
- wsi->do_ws = 0;
- }
-
- if (!strcmp(meth, "RAW")) {
- lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
- lwsl_notice("client transition to raw\n");
-
- if (pp) {
- const struct lws_protocols *pr;
-
- pr = lws_vhost_name_to_protocol(wsi->vhost, pp);
-
- if (!pr) {
- lwsl_err("protocol %s not enabled on vhost\n",
- pp);
- return NULL;
- }
-
- lws_bind_protocol(wsi, pr);
- }
-
- if ((wsi->protocol->callback)(wsi,
- LWS_CALLBACK_RAW_ADOPT,
- wsi->user_space, NULL, 0))
- return NULL;
-
- lws_header_table_force_to_detachable_state(wsi);
- lws_union_transition(wsi, LWSCM_RAW);
- lws_header_table_detach(wsi, 1);
-
- return NULL;
- }
-
- if (wsi->do_ws) {
- /*
- * create the random key
- */
- n = lws_get_random(context, hash, 16);
- if (n != 16) {
- lwsl_err("Unable to read from random dev %s\n",
- SYSTEM_RANDOM_FILEPATH);
- return NULL;
- }
-
- lws_b64_encode_string(hash, 16, key_b64, sizeof(key_b64));
- }
-
- /*
- * 04 example client handshake
- *
- * GET /chat HTTP/1.1
- * Host: server.example.com
- * Upgrade: websocket
- * Connection: Upgrade
- * Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
- * Sec-WebSocket-Origin: http://example.com
- * Sec-WebSocket-Protocol: chat, superchat
- * Sec-WebSocket-Version: 4
- */
-
- p += sprintf(p, "%s %s HTTP/1.1\x0d\x0a", meth,
- lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_URI));
-
- p += sprintf(p, "Pragma: no-cache\x0d\x0a"
- "Cache-Control: no-cache\x0d\x0a");
-
- p += sprintf(p, "Host: %s\x0d\x0a",
- lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_HOST));
-
- if (lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_ORIGIN)) {
- if (lws_check_opt(context->options, LWS_SERVER_OPTION_JUST_USE_RAW_ORIGIN))
- p += sprintf(p, "Origin: %s\x0d\x0a",
- lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_ORIGIN));
- else
- p += sprintf(p, "Origin: http://%s\x0d\x0a",
- lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_ORIGIN));
- }
-
- if (wsi->do_ws) {
- p += sprintf(p, "Upgrade: websocket\x0d\x0a"
- "Connection: Upgrade\x0d\x0a"
- "Sec-WebSocket-Key: ");
- strcpy(p, key_b64);
- p += strlen(key_b64);
- p += sprintf(p, "\x0d\x0a");
- if (lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS))
- p += sprintf(p, "Sec-WebSocket-Protocol: %s\x0d\x0a",
- lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS));
-
- /* tell the server what extensions we could support */
-
-#ifndef LWS_NO_EXTENSIONS
- ext = wsi->vhost->extensions;
- while (ext && ext->callback) {
- n = lws_ext_cb_all_exts(context, wsi,
- LWS_EXT_CB_CHECK_OK_TO_PROPOSE_EXTENSION,
- (char *)ext->name, 0);
- if (n) { /* an extension vetos us */
- lwsl_ext("ext %s vetoed\n", (char *)ext->name);
- ext++;
- continue;
- }
- n = wsi->vhost->protocols[0].callback(wsi,
- LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED,
- wsi->user_space, (char *)ext->name, 0);
-
- /*
- * zero return from callback means
- * go ahead and allow the extension,
- * it's what we get if the callback is
- * unhandled
- */
-
- if (n) {
- ext++;
- continue;
- }
-
- /* apply it */
-
- if (ext_count)
- *p++ = ',';
- else
- p += sprintf(p, "Sec-WebSocket-Extensions: ");
- p += sprintf(p, "%s", ext->client_offer);
- ext_count++;
-
- ext++;
- }
- if (ext_count)
- p += sprintf(p, "\x0d\x0a");
-#endif
-
- if (wsi->ietf_spec_revision)
- p += sprintf(p, "Sec-WebSocket-Version: %d\x0d\x0a",
- wsi->ietf_spec_revision);
-
- /* prepare the expected server accept response */
-
- key_b64[39] = '\0'; /* enforce composed length below buf sizeof */
- n = sprintf(buf, "%s258EAFA5-E914-47DA-95CA-C5AB0DC85B11", key_b64);
-
- lws_SHA1((unsigned char *)buf, n, (unsigned char *)hash);
-
- lws_b64_encode_string(hash, 20,
- wsi->u.hdr.ah->initial_handshake_hash_base64,
- sizeof(wsi->u.hdr.ah->initial_handshake_hash_base64));
- }
-
- /* give userland a chance to append, eg, cookies */
-
- if (wsi->protocol->callback(wsi, LWS_CALLBACK_CLIENT_APPEND_HANDSHAKE_HEADER,
- wsi->user_space, &p, (pkt + context->pt_serv_buf_size) - p - 12))
- return NULL;
-
- p += sprintf(p, "\x0d\x0a");
-
- return p;
-}
-