1051 lines
27 KiB
C
1051 lines
27 KiB
C
#include "private-libwebsockets.h"
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static int
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lws_getaddrinfo46(struct lws *wsi, const char *ads, struct addrinfo **result)
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{
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struct addrinfo hints;
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memset(&hints, 0, sizeof(hints));
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*result = NULL;
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#ifdef LWS_WITH_IPV6
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if (wsi->ipv6) {
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#if !defined(__ANDROID__)
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hints.ai_family = AF_INET6;
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hints.ai_flags = AI_V4MAPPED;
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#endif
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} else
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#endif
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{
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_CANONNAME;
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}
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return getaddrinfo(ads, NULL, &hints, result);
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}
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struct lws *
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lws_client_connect_2(struct lws *wsi)
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{
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sockaddr46 sa46;
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struct addrinfo *result;
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struct lws_context *context = wsi->context;
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struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
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struct lws_pollfd pfd;
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const char *cce = "", *iface;
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int n, port;
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ssize_t plen = 0;
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const char *ads;
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#ifdef LWS_WITH_IPV6
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char ipv6only = lws_check_opt(wsi->vhost->options,
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LWS_SERVER_OPTION_IPV6_V6ONLY_MODIFY |
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LWS_SERVER_OPTION_IPV6_V6ONLY_VALUE);
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#if defined(__ANDROID__)
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ipv6only = 0;
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#endif
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#endif
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lwsl_client("%s\n", __func__);
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if (!wsi->u.hdr.ah) {
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cce = "ah was NULL at cc2";
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lwsl_err("%s\n", cce);
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goto oom4;
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}
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/*
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* start off allowing ipv6 on connection if vhost allows it
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*/
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wsi->ipv6 = LWS_IPV6_ENABLED(wsi->vhost);
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/* Decide what it is we need to connect to:
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*
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* Priority 1: connect to http proxy */
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if (wsi->vhost->http_proxy_port) {
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plen = sprintf((char *)pt->serv_buf,
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"CONNECT %s:%u HTTP/1.0\x0d\x0a"
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"User-agent: libwebsockets\x0d\x0a",
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lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS),
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wsi->c_port);
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if (wsi->vhost->proxy_basic_auth_token[0])
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plen += sprintf((char *)pt->serv_buf + plen,
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"Proxy-authorization: basic %s\x0d\x0a",
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wsi->vhost->proxy_basic_auth_token);
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plen += sprintf((char *)pt->serv_buf + plen, "\x0d\x0a");
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ads = wsi->vhost->http_proxy_address;
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port = wsi->vhost->http_proxy_port;
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#if defined(LWS_WITH_SOCKS5)
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/* Priority 2: Connect to SOCK5 Proxy */
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} else if (wsi->vhost->socks_proxy_port) {
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socks_generate_msg(wsi, SOCKS_MSG_GREETING, &plen);
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lwsl_client("Sending SOCKS Greeting\n");
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ads = wsi->vhost->socks_proxy_address;
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port = wsi->vhost->socks_proxy_port;
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#endif
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} else {
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/* Priority 3: Connect directly */
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ads = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS);
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port = wsi->c_port;
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}
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/*
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* prepare the actual connection
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* to whatever we decided to connect to
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*/
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lwsl_notice("%s: %p: address %s\n", __func__, wsi, ads);
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n = lws_getaddrinfo46(wsi, ads, &result);
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#ifdef LWS_WITH_IPV6
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if (wsi->ipv6) {
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if (n) {
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/* lws_getaddrinfo46 failed, there is no usable result */
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lwsl_notice("%s: lws_getaddrinfo46 failed %d\n",
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__func__, n);
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cce = "ipv6 lws_getaddrinfo46 failed";
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goto oom4;
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}
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memset(&sa46, 0, sizeof(sa46));
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sa46.sa6.sin6_family = AF_INET6;
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switch (result->ai_family) {
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case AF_INET:
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if (ipv6only)
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break;
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/* map IPv4 to IPv6 */
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bzero((char *)&sa46.sa6.sin6_addr,
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sizeof(sa46.sa6.sin6_addr));
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sa46.sa6.sin6_addr.s6_addr[10] = 0xff;
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sa46.sa6.sin6_addr.s6_addr[11] = 0xff;
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memcpy(&sa46.sa6.sin6_addr.s6_addr[12],
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&((struct sockaddr_in *)result->ai_addr)->sin_addr,
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sizeof(struct in_addr));
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lwsl_notice("uplevelling AF_INET to AF_INET6\n");
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break;
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case AF_INET6:
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memcpy(&sa46.sa6.sin6_addr,
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&((struct sockaddr_in6 *)result->ai_addr)->sin6_addr,
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sizeof(struct in6_addr));
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sa46.sa6.sin6_scope_id = ((struct sockaddr_in6 *)result->ai_addr)->sin6_scope_id;
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sa46.sa6.sin6_flowinfo = ((struct sockaddr_in6 *)result->ai_addr)->sin6_flowinfo;
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break;
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default:
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lwsl_err("Unknown address family\n");
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freeaddrinfo(result);
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cce = "unknown address family";
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goto oom4;
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}
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} else
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#endif /* use ipv6 */
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/* use ipv4 */
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{
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void *p = NULL;
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if (!n) {
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struct addrinfo *res = result;
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/* pick the first AF_INET (IPv4) result */
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while (!p && res) {
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switch (res->ai_family) {
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case AF_INET:
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p = &((struct sockaddr_in *)res->ai_addr)->sin_addr;
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break;
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}
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res = res->ai_next;
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}
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#if defined(LWS_FALLBACK_GETHOSTBYNAME)
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} else if (n == EAI_SYSTEM) {
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struct hostent *host;
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lwsl_info("getaddrinfo (ipv4) failed, trying gethostbyname\n");
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host = gethostbyname(ads);
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if (host) {
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p = host->h_addr;
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} else {
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lwsl_err("gethostbyname failed\n");
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cce = "gethostbyname (ipv4) failed";
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goto oom4;
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}
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#endif
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} else {
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lwsl_err("getaddrinfo failed\n");
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cce = "getaddrinfo failed";
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goto oom4;
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}
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if (!p) {
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if (result)
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freeaddrinfo(result);
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lwsl_err("Couldn't identify address\n");
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cce = "unable to lookup address";
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goto oom4;
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}
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sa46.sa4.sin_family = AF_INET;
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sa46.sa4.sin_addr = *((struct in_addr *)p);
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bzero(&sa46.sa4.sin_zero, 8);
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}
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if (result)
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freeaddrinfo(result);
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/* now we decided on ipv4 or ipv6, set the port */
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if (!lws_socket_is_valid(wsi->desc.sockfd)) {
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#if defined(LWS_WITH_LIBUV)
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if (LWS_LIBUV_ENABLED(context))
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if (lws_libuv_check_watcher_active(wsi)) {
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lwsl_warn("Waiting for libuv watcher to close\n");
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cce = "waiting for libuv watcher to close";
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goto oom4;
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}
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#endif
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#ifdef LWS_WITH_IPV6
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if (wsi->ipv6)
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wsi->desc.sockfd = socket(AF_INET6, SOCK_STREAM, 0);
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else
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#endif
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wsi->desc.sockfd = socket(AF_INET, SOCK_STREAM, 0);
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if (!lws_socket_is_valid(wsi->desc.sockfd)) {
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lwsl_warn("Unable to open socket\n");
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cce = "unable to open socket";
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goto oom4;
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}
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if (lws_plat_set_socket_options(wsi->vhost, wsi->desc.sockfd)) {
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lwsl_err("Failed to set wsi socket options\n");
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compatible_close(wsi->desc.sockfd);
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cce = "set socket opts failed";
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goto oom4;
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}
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wsi->mode = LWSCM_WSCL_WAITING_CONNECT;
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lws_libev_accept(wsi, wsi->desc);
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lws_libuv_accept(wsi, wsi->desc);
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lws_libevent_accept(wsi, wsi->desc);
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if (insert_wsi_socket_into_fds(context, wsi)) {
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compatible_close(wsi->desc.sockfd);
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cce = "insert wsi failed";
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goto oom4;
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}
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lws_change_pollfd(wsi, 0, LWS_POLLIN);
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/*
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* past here, we can't simply free the structs as error
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* handling as oom4 does. We have to run the whole close flow.
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*/
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if (!wsi->protocol)
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wsi->protocol = &wsi->vhost->protocols[0];
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wsi->protocol->callback(wsi, LWS_CALLBACK_WSI_CREATE,
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wsi->user_space, NULL, 0);
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lws_set_timeout(wsi, PENDING_TIMEOUT_AWAITING_CONNECT_RESPONSE,
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AWAITING_TIMEOUT);
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iface = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_IFACE);
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if (iface) {
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n = lws_socket_bind(wsi->vhost, wsi->desc.sockfd, 0, iface);
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if (n < 0) {
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cce = "unable to bind socket";
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goto failed;
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}
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}
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}
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#ifdef LWS_WITH_IPV6
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if (wsi->ipv6) {
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sa46.sa6.sin6_port = htons(port);
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n = sizeof(struct sockaddr_in6);
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} else
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#endif
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{
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sa46.sa4.sin_port = htons(port);
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n = sizeof(struct sockaddr);
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}
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if (connect(wsi->desc.sockfd, (const struct sockaddr *)&sa46, n) == -1 ||
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LWS_ERRNO == LWS_EISCONN) {
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if (LWS_ERRNO == LWS_EALREADY ||
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LWS_ERRNO == LWS_EINPROGRESS ||
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LWS_ERRNO == LWS_EWOULDBLOCK
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#ifdef _WIN32
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|| LWS_ERRNO == WSAEINVAL
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#endif
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) {
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lwsl_client("nonblocking connect retry (errno = %d)\n",
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LWS_ERRNO);
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if (lws_plat_check_connection_error(wsi)) {
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cce = "socket connect failed";
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goto failed;
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}
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/*
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* must do specifically a POLLOUT poll to hear
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* about the connect completion
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*/
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if (lws_change_pollfd(wsi, 0, LWS_POLLOUT)) {
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cce = "POLLOUT set failed";
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goto failed;
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}
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return wsi;
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}
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if (LWS_ERRNO != LWS_EISCONN) {
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lwsl_notice("Connect failed errno=%d\n", LWS_ERRNO);
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cce = "connect failed";
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goto failed;
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}
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}
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lwsl_client("connected\n");
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/* we are connected to server, or proxy */
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/* http proxy */
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if (wsi->vhost->http_proxy_port) {
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/*
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* OK from now on we talk via the proxy, so connect to that
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*
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* (will overwrite existing pointer,
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* leaving old string/frag there but unreferenced)
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*/
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if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS,
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wsi->vhost->http_proxy_address))
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goto failed;
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wsi->c_port = wsi->vhost->http_proxy_port;
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n = send(wsi->desc.sockfd, (char *)pt->serv_buf, plen,
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MSG_NOSIGNAL);
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if (n < 0) {
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lwsl_debug("ERROR writing to proxy socket\n");
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|
cce = "proxy write failed";
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goto failed;
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|
}
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lws_set_timeout(wsi, PENDING_TIMEOUT_AWAITING_PROXY_RESPONSE,
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AWAITING_TIMEOUT);
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wsi->mode = LWSCM_WSCL_WAITING_PROXY_REPLY;
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return wsi;
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}
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#if defined(LWS_WITH_SOCKS5)
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/* socks proxy */
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else if (wsi->vhost->socks_proxy_port) {
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n = send(wsi->desc.sockfd, (char *)pt->serv_buf, plen,
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MSG_NOSIGNAL);
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if (n < 0) {
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lwsl_debug("ERROR writing socks greeting\n");
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cce = "socks write failed";
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goto failed;
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}
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lws_set_timeout(wsi, PENDING_TIMEOUT_AWAITING_SOCKS_GREETING_REPLY,
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AWAITING_TIMEOUT);
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wsi->mode = LWSCM_WSCL_WAITING_SOCKS_GREETING_REPLY;
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return wsi;
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}
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#endif
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/*
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* provoke service to issue the handshake directly
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* we need to do it this way because in the proxy case, this is the
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* next state and executed only if and when we get a good proxy
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* response inside the state machine... but notice in SSL case this
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* may not have sent anything yet with 0 return, and won't until some
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* many retries from main loop. To stop that becoming endless,
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* cover with a timeout.
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*/
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lws_set_timeout(wsi, PENDING_TIMEOUT_SENT_CLIENT_HANDSHAKE,
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AWAITING_TIMEOUT);
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wsi->mode = LWSCM_WSCL_ISSUE_HANDSHAKE;
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pfd.fd = wsi->desc.sockfd;
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pfd.events = LWS_POLLIN;
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pfd.revents = LWS_POLLIN;
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n = lws_service_fd(context, &pfd);
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if (n < 0) {
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cce = "first service failed";
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goto failed;
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}
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if (n) /* returns 1 on failure after closing wsi */
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return NULL;
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return wsi;
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|
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oom4:
|
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/* we're closing, losing some rx is OK */
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lws_header_table_force_to_detachable_state(wsi);
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|
|
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if (wsi->mode == LWSCM_HTTP_CLIENT ||
|
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wsi->mode == LWSCM_HTTP_CLIENT_ACCEPTED ||
|
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wsi->mode == LWSCM_WSCL_WAITING_CONNECT) {
|
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wsi->vhost->protocols[0].callback(wsi,
|
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LWS_CALLBACK_CLIENT_CONNECTION_ERROR,
|
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wsi->user_space, (void *)cce, strlen(cce));
|
|
wsi->already_did_cce = 1;
|
|
}
|
|
/* take care that we might be inserted in fds already */
|
|
if (wsi->position_in_fds_table != -1)
|
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goto failed1;
|
|
lws_remove_from_timeout_list(wsi);
|
|
lws_header_table_detach(wsi, 0);
|
|
lws_free(wsi);
|
|
|
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return NULL;
|
|
|
|
failed:
|
|
wsi->vhost->protocols[0].callback(wsi,
|
|
LWS_CALLBACK_CLIENT_CONNECTION_ERROR,
|
|
wsi->user_space, (void *)cce, strlen(cce));
|
|
wsi->already_did_cce = 1;
|
|
failed1:
|
|
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* lws_client_reset() - retarget a connected wsi to start over with a new connection (ie, redirect)
|
|
* this only works if still in HTTP, ie, not upgraded yet
|
|
* wsi: connection to reset
|
|
* address: network address of the new server
|
|
* port: port to connect to
|
|
* path: uri path to connect to on the new server
|
|
* host: host header to send to the new server
|
|
*/
|
|
LWS_VISIBLE struct lws *
|
|
lws_client_reset(struct lws **pwsi, int ssl, const char *address, int port,
|
|
const char *path, const char *host)
|
|
{
|
|
char origin[300] = "", protocol[300] = "", method[32] = "", iface[16] = "", *p;
|
|
struct lws *wsi = *pwsi;
|
|
|
|
if (wsi->redirects == 3) {
|
|
lwsl_err("%s: Too many redirects\n", __func__);
|
|
return NULL;
|
|
}
|
|
wsi->redirects++;
|
|
|
|
p = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_ORIGIN);
|
|
if (p)
|
|
strncpy(origin, p, sizeof(origin) - 1);
|
|
|
|
p = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS);
|
|
if (p)
|
|
strncpy(protocol, p, sizeof(protocol) - 1);
|
|
|
|
p = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_METHOD);
|
|
if (p)
|
|
strncpy(method, p, sizeof(method) - 1);
|
|
|
|
p = lws_hdr_simple_ptr(wsi, _WSI_TOKEN_CLIENT_IFACE);
|
|
if (p)
|
|
strncpy(method, p, sizeof(iface) - 1);
|
|
|
|
lwsl_info("redirect ads='%s', port=%d, path='%s', ssl = %d\n",
|
|
address, port, path, ssl);
|
|
|
|
/* close the connection by hand */
|
|
|
|
#ifdef LWS_OPENSSL_SUPPORT
|
|
lws_ssl_close(wsi);
|
|
#endif
|
|
|
|
#ifdef LWS_WITH_LIBUV
|
|
if (LWS_LIBUV_ENABLED(wsi->context)) {
|
|
lwsl_debug("%s: lws_libuv_closehandle: wsi %p\n", __func__, wsi);
|
|
/*
|
|
* libuv has to do his own close handle processing asynchronously
|
|
* but once it starts we can do everything else synchronously,
|
|
* including trash wsi->desc.sockfd since it took a copy.
|
|
*
|
|
* When it completes it will call compatible_close()
|
|
*/
|
|
lws_libuv_closehandle_manually(wsi);
|
|
} else
|
|
#else
|
|
compatible_close(wsi->desc.sockfd);
|
|
#endif
|
|
|
|
remove_wsi_socket_from_fds(wsi);
|
|
|
|
#ifdef LWS_OPENSSL_SUPPORT
|
|
wsi->use_ssl = ssl;
|
|
#else
|
|
if (ssl) {
|
|
lwsl_err("%s: not configured for ssl\n", __func__);
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
wsi->desc.sockfd = LWS_SOCK_INVALID;
|
|
wsi->state = LWSS_CLIENT_UNCONNECTED;
|
|
wsi->protocol = NULL;
|
|
wsi->pending_timeout = NO_PENDING_TIMEOUT;
|
|
wsi->c_port = port;
|
|
wsi->hdr_parsing_completed = 0;
|
|
_lws_header_table_reset(wsi->u.hdr.ah);
|
|
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS, address))
|
|
return NULL;
|
|
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_HOST, host))
|
|
return NULL;
|
|
|
|
if (origin[0])
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_ORIGIN,
|
|
origin))
|
|
return NULL;
|
|
if (protocol[0])
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS,
|
|
protocol))
|
|
return NULL;
|
|
if (method[0])
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_METHOD,
|
|
method))
|
|
return NULL;
|
|
|
|
if (iface[0])
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_IFACE,
|
|
iface))
|
|
return NULL;
|
|
|
|
origin[0] = '/';
|
|
strncpy(&origin[1], path, sizeof(origin) - 2);
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_URI, origin))
|
|
return NULL;
|
|
|
|
*pwsi = lws_client_connect_2(wsi);
|
|
|
|
return *pwsi;
|
|
}
|
|
|
|
#ifdef LWS_WITH_HTTP_PROXY
|
|
static hubbub_error
|
|
html_parser_cb(const hubbub_token *token, void *pw)
|
|
{
|
|
struct lws_rewrite *r = (struct lws_rewrite *)pw;
|
|
char buf[1024], *start = buf + LWS_PRE, *p = start,
|
|
*end = &buf[sizeof(buf) - 1];
|
|
size_t i;
|
|
|
|
switch (token->type) {
|
|
case HUBBUB_TOKEN_DOCTYPE:
|
|
|
|
p += lws_snprintf(p, end - p, "<!DOCTYPE %.*s %s ",
|
|
(int) token->data.doctype.name.len,
|
|
token->data.doctype.name.ptr,
|
|
token->data.doctype.force_quirks ?
|
|
"(force-quirks) " : "");
|
|
|
|
if (token->data.doctype.public_missing)
|
|
lwsl_debug("\tpublic: missing\n");
|
|
else
|
|
p += lws_snprintf(p, end - p, "PUBLIC \"%.*s\"\n",
|
|
(int) token->data.doctype.public_id.len,
|
|
token->data.doctype.public_id.ptr);
|
|
|
|
if (token->data.doctype.system_missing)
|
|
lwsl_debug("\tsystem: missing\n");
|
|
else
|
|
p += lws_snprintf(p, end - p, " \"%.*s\">\n",
|
|
(int) token->data.doctype.system_id.len,
|
|
token->data.doctype.system_id.ptr);
|
|
|
|
break;
|
|
case HUBBUB_TOKEN_START_TAG:
|
|
p += lws_snprintf(p, end - p, "<%.*s", (int)token->data.tag.name.len,
|
|
token->data.tag.name.ptr);
|
|
|
|
/* (token->data.tag.self_closing) ?
|
|
"(self-closing) " : "",
|
|
(token->data.tag.n_attributes > 0) ?
|
|
"attributes:" : "");
|
|
*/
|
|
for (i = 0; i < token->data.tag.n_attributes; i++) {
|
|
if (!hstrcmp(&token->data.tag.attributes[i].name, "href", 4) ||
|
|
!hstrcmp(&token->data.tag.attributes[i].name, "action", 6) ||
|
|
!hstrcmp(&token->data.tag.attributes[i].name, "src", 3)) {
|
|
const char *pp = (const char *)token->data.tag.attributes[i].value.ptr;
|
|
int plen = (int) token->data.tag.attributes[i].value.len;
|
|
|
|
if (strncmp(pp, "http:", 5) && strncmp(pp, "https:", 6)) {
|
|
|
|
if (!hstrcmp(&token->data.tag.attributes[i].value,
|
|
r->from, r->from_len)) {
|
|
pp += r->from_len;
|
|
plen -= r->from_len;
|
|
}
|
|
p += lws_snprintf(p, end - p, " %.*s=\"%s/%.*s\"",
|
|
(int) token->data.tag.attributes[i].name.len,
|
|
token->data.tag.attributes[i].name.ptr,
|
|
r->to, plen, pp);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
p += lws_snprintf(p, end - p, " %.*s=\"%.*s\"",
|
|
(int) token->data.tag.attributes[i].name.len,
|
|
token->data.tag.attributes[i].name.ptr,
|
|
(int) token->data.tag.attributes[i].value.len,
|
|
token->data.tag.attributes[i].value.ptr);
|
|
}
|
|
p += lws_snprintf(p, end - p, ">");
|
|
break;
|
|
case HUBBUB_TOKEN_END_TAG:
|
|
p += lws_snprintf(p, end - p, "</%.*s", (int) token->data.tag.name.len,
|
|
token->data.tag.name.ptr);
|
|
/*
|
|
(token->data.tag.self_closing) ?
|
|
"(self-closing) " : "",
|
|
(token->data.tag.n_attributes > 0) ?
|
|
"attributes:" : "");
|
|
*/
|
|
for (i = 0; i < token->data.tag.n_attributes; i++) {
|
|
p += lws_snprintf(p, end - p, " %.*s='%.*s'\n",
|
|
(int) token->data.tag.attributes[i].name.len,
|
|
token->data.tag.attributes[i].name.ptr,
|
|
(int) token->data.tag.attributes[i].value.len,
|
|
token->data.tag.attributes[i].value.ptr);
|
|
}
|
|
p += lws_snprintf(p, end - p, ">");
|
|
break;
|
|
case HUBBUB_TOKEN_COMMENT:
|
|
p += lws_snprintf(p, end - p, "<!-- %.*s -->\n",
|
|
(int) token->data.comment.len,
|
|
token->data.comment.ptr);
|
|
break;
|
|
case HUBBUB_TOKEN_CHARACTER:
|
|
if (token->data.character.len == 1) {
|
|
if (*token->data.character.ptr == '<') {
|
|
p += lws_snprintf(p, end - p, "<");
|
|
break;
|
|
}
|
|
if (*token->data.character.ptr == '>') {
|
|
p += lws_snprintf(p, end - p, ">");
|
|
break;
|
|
}
|
|
if (*token->data.character.ptr == '&') {
|
|
p += lws_snprintf(p, end - p, "&");
|
|
break;
|
|
}
|
|
}
|
|
|
|
p += lws_snprintf(p, end - p, "%.*s", (int) token->data.character.len,
|
|
token->data.character.ptr);
|
|
break;
|
|
case HUBBUB_TOKEN_EOF:
|
|
p += lws_snprintf(p, end - p, "\n");
|
|
break;
|
|
}
|
|
|
|
if (user_callback_handle_rxflow(r->wsi->protocol->callback,
|
|
r->wsi, LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ,
|
|
r->wsi->user_space, start, p - start))
|
|
return -1;
|
|
|
|
return HUBBUB_OK;
|
|
}
|
|
#endif
|
|
|
|
LWS_VISIBLE struct lws *
|
|
lws_client_connect_via_info(struct lws_client_connect_info *i)
|
|
{
|
|
struct lws *wsi;
|
|
int v = SPEC_LATEST_SUPPORTED;
|
|
const struct lws_protocols *p;
|
|
|
|
if (i->context->requested_kill)
|
|
return NULL;
|
|
|
|
if (!i->context->protocol_init_done)
|
|
lws_protocol_init(i->context);
|
|
|
|
wsi = lws_zalloc(sizeof(struct lws), "client wsi");
|
|
if (wsi == NULL)
|
|
goto bail;
|
|
|
|
wsi->context = i->context;
|
|
/* assert the mode and union status (hdr) clearly */
|
|
lws_union_transition(wsi, LWSCM_HTTP_CLIENT);
|
|
wsi->desc.sockfd = LWS_SOCK_INVALID;
|
|
|
|
/* 1) fill up the wsi with stuff from the connect_info as far as it
|
|
* can go. It's because not only is our connection async, we might
|
|
* not even be able to get ahold of an ah at this point.
|
|
*/
|
|
|
|
/* -1 means just use latest supported */
|
|
if (i->ietf_version_or_minus_one != -1 && i->ietf_version_or_minus_one)
|
|
v = i->ietf_version_or_minus_one;
|
|
|
|
wsi->ietf_spec_revision = v;
|
|
wsi->user_space = NULL;
|
|
wsi->state = LWSS_CLIENT_UNCONNECTED;
|
|
wsi->pending_timeout = NO_PENDING_TIMEOUT;
|
|
wsi->position_in_fds_table = -1;
|
|
wsi->c_port = i->port;
|
|
wsi->vhost = i->vhost;
|
|
if (!wsi->vhost)
|
|
wsi->vhost = i->context->vhost_list;
|
|
|
|
wsi->protocol = &wsi->vhost->protocols[0];
|
|
|
|
/* for http[s] connection, allow protocol selection by name */
|
|
|
|
if (i->method && i->vhost && i->protocol) {
|
|
p = lws_vhost_name_to_protocol(i->vhost, i->protocol);
|
|
if (p)
|
|
wsi->protocol = p;
|
|
}
|
|
|
|
if (wsi && !wsi->user_space && i->userdata) {
|
|
wsi->user_space_externally_allocated = 1;
|
|
wsi->user_space = i->userdata;
|
|
} else
|
|
/* if we stay in http, we can assign the user space now,
|
|
* otherwise do it after the protocol negotiated
|
|
*/
|
|
if (i->method)
|
|
if (lws_ensure_user_space(wsi))
|
|
goto bail;
|
|
|
|
#ifdef LWS_OPENSSL_SUPPORT
|
|
wsi->use_ssl = i->ssl_connection;
|
|
#else
|
|
if (i->ssl_connection) {
|
|
lwsl_err("libwebsockets not configured for ssl\n");
|
|
goto bail;
|
|
}
|
|
#endif
|
|
|
|
/* 2) stash the things from connect_info that we can't process without
|
|
* an ah. Because if no ah, we will go on the ah waiting list and
|
|
* process those things later (after the connect_info and maybe the
|
|
* things pointed to have gone out of scope.
|
|
*/
|
|
|
|
wsi->u.hdr.stash = lws_malloc(sizeof(*wsi->u.hdr.stash), "client stash");
|
|
if (!wsi->u.hdr.stash) {
|
|
lwsl_err("%s: OOM\n", __func__);
|
|
goto bail;
|
|
}
|
|
|
|
wsi->u.hdr.stash->origin[0] = '\0';
|
|
wsi->u.hdr.stash->protocol[0] = '\0';
|
|
wsi->u.hdr.stash->method[0] = '\0';
|
|
wsi->u.hdr.stash->iface[0] = '\0';
|
|
|
|
strncpy(wsi->u.hdr.stash->address, i->address,
|
|
sizeof(wsi->u.hdr.stash->address) - 1);
|
|
strncpy(wsi->u.hdr.stash->path, i->path,
|
|
sizeof(wsi->u.hdr.stash->path) - 1);
|
|
strncpy(wsi->u.hdr.stash->host, i->host,
|
|
sizeof(wsi->u.hdr.stash->host) - 1);
|
|
if (i->origin)
|
|
strncpy(wsi->u.hdr.stash->origin, i->origin,
|
|
sizeof(wsi->u.hdr.stash->origin) - 1);
|
|
if (i->protocol)
|
|
strncpy(wsi->u.hdr.stash->protocol, i->protocol,
|
|
sizeof(wsi->u.hdr.stash->protocol) - 1);
|
|
if (i->method)
|
|
strncpy(wsi->u.hdr.stash->method, i->method,
|
|
sizeof(wsi->u.hdr.stash->method) - 1);
|
|
if (i->iface)
|
|
strncpy(wsi->u.hdr.stash->iface, i->iface,
|
|
sizeof(wsi->u.hdr.stash->iface) - 1);
|
|
|
|
wsi->u.hdr.stash->address[sizeof(wsi->u.hdr.stash->address) - 1] = '\0';
|
|
wsi->u.hdr.stash->path[sizeof(wsi->u.hdr.stash->path) - 1] = '\0';
|
|
wsi->u.hdr.stash->host[sizeof(wsi->u.hdr.stash->host) - 1] = '\0';
|
|
wsi->u.hdr.stash->origin[sizeof(wsi->u.hdr.stash->origin) - 1] = '\0';
|
|
wsi->u.hdr.stash->protocol[sizeof(wsi->u.hdr.stash->protocol) - 1] = '\0';
|
|
wsi->u.hdr.stash->method[sizeof(wsi->u.hdr.stash->method) - 1] = '\0';
|
|
wsi->u.hdr.stash->iface[sizeof(wsi->u.hdr.stash->iface) - 1] = '\0';
|
|
|
|
if (i->pwsi)
|
|
*i->pwsi = wsi;
|
|
|
|
/* if we went on the waiting list, no probs just return the wsi
|
|
* when we get the ah, now or later, he will call
|
|
* lws_client_connect_via_info2() below.
|
|
*/
|
|
if (lws_header_table_attach(wsi, 0) < 0) {
|
|
/*
|
|
* if we failed here, the connection is already closed
|
|
* and freed.
|
|
*/
|
|
goto bail1;
|
|
}
|
|
|
|
if (i->parent_wsi) {
|
|
lwsl_info("%s: created child %p of parent %p\n", __func__,
|
|
wsi, i->parent_wsi);
|
|
wsi->parent = i->parent_wsi;
|
|
wsi->sibling_list = i->parent_wsi->child_list;
|
|
i->parent_wsi->child_list = wsi;
|
|
}
|
|
#ifdef LWS_WITH_HTTP_PROXY
|
|
if (i->uri_replace_to)
|
|
wsi->rw = lws_rewrite_create(wsi, html_parser_cb,
|
|
i->uri_replace_from,
|
|
i->uri_replace_to);
|
|
#endif
|
|
|
|
return wsi;
|
|
|
|
bail:
|
|
lws_free(wsi);
|
|
|
|
bail1:
|
|
if (i->pwsi)
|
|
*i->pwsi = NULL;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct lws *
|
|
lws_client_connect_via_info2(struct lws *wsi)
|
|
{
|
|
struct client_info_stash *stash = wsi->u.hdr.stash;
|
|
|
|
if (!stash)
|
|
return wsi;
|
|
|
|
/*
|
|
* we're not necessarily in a position to action these right away,
|
|
* stash them... we only need during connect phase so u.hdr is fine
|
|
*/
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_PEER_ADDRESS,
|
|
stash->address))
|
|
goto bail1;
|
|
|
|
/* these only need u.hdr lifetime as well */
|
|
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_URI, stash->path))
|
|
goto bail1;
|
|
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_HOST, stash->host))
|
|
goto bail1;
|
|
|
|
if (stash->origin[0])
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_ORIGIN,
|
|
stash->origin))
|
|
goto bail1;
|
|
/*
|
|
* this is a list of protocols we tell the server we're okay with
|
|
* stash it for later when we compare server response with it
|
|
*/
|
|
if (stash->protocol[0])
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_SENT_PROTOCOLS,
|
|
stash->protocol))
|
|
goto bail1;
|
|
if (stash->method[0])
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_METHOD,
|
|
stash->method))
|
|
goto bail1;
|
|
if (stash->iface[0])
|
|
if (lws_hdr_simple_create(wsi, _WSI_TOKEN_CLIENT_IFACE,
|
|
stash->iface))
|
|
goto bail1;
|
|
|
|
#if defined(LWS_WITH_SOCKS5)
|
|
if (!wsi->vhost->socks_proxy_port)
|
|
lws_free_set_NULL(wsi->u.hdr.stash);
|
|
#endif
|
|
|
|
/*
|
|
* Check with each extension if it is able to route and proxy this
|
|
* connection for us. For example, an extension like x-google-mux
|
|
* can handle this and then we don't need an actual socket for this
|
|
* connection.
|
|
*/
|
|
|
|
if (lws_ext_cb_all_exts(wsi->context, wsi,
|
|
LWS_EXT_CB_CAN_PROXY_CLIENT_CONNECTION,
|
|
(void *)stash->address,
|
|
wsi->c_port) > 0) {
|
|
lwsl_client("lws_client_connect: ext handling conn\n");
|
|
|
|
lws_set_timeout(wsi,
|
|
PENDING_TIMEOUT_AWAITING_EXTENSION_CONNECT_RESPONSE,
|
|
AWAITING_TIMEOUT);
|
|
|
|
wsi->mode = LWSCM_WSCL_WAITING_EXTENSION_CONNECT;
|
|
return wsi;
|
|
}
|
|
lwsl_client("lws_client_connect: direct conn\n");
|
|
wsi->context->count_wsi_allocated++;
|
|
|
|
return lws_client_connect_2(wsi);
|
|
|
|
bail1:
|
|
#if defined(LWS_WITH_SOCKS5)
|
|
if (!wsi->vhost->socks_proxy_port)
|
|
lws_free_set_NULL(wsi->u.hdr.stash);
|
|
#endif
|
|
|
|
return NULL;
|
|
}
|
|
|
|
LWS_VISIBLE struct lws *
|
|
lws_client_connect_extended(struct lws_context *context, const char *address,
|
|
int port, int ssl_connection, const char *path,
|
|
const char *host, const char *origin,
|
|
const char *protocol, int ietf_version_or_minus_one,
|
|
void *userdata)
|
|
{
|
|
struct lws_client_connect_info i;
|
|
|
|
memset(&i, 0, sizeof(i));
|
|
|
|
i.context = context;
|
|
i.address = address;
|
|
i.port = port;
|
|
i.ssl_connection = ssl_connection;
|
|
i.path = path;
|
|
i.host = host;
|
|
i.origin = origin;
|
|
i.protocol = protocol;
|
|
i.ietf_version_or_minus_one = ietf_version_or_minus_one;
|
|
i.userdata = userdata;
|
|
|
|
return lws_client_connect_via_info(&i);
|
|
}
|
|
|
|
LWS_VISIBLE struct lws *
|
|
lws_client_connect(struct lws_context *context, const char *address,
|
|
int port, int ssl_connection, const char *path,
|
|
const char *host, const char *origin,
|
|
const char *protocol, int ietf_version_or_minus_one)
|
|
{
|
|
struct lws_client_connect_info i;
|
|
|
|
memset(&i, 0, sizeof(i));
|
|
|
|
i.context = context;
|
|
i.address = address;
|
|
i.port = port;
|
|
i.ssl_connection = ssl_connection;
|
|
i.path = path;
|
|
i.host = host;
|
|
i.origin = origin;
|
|
i.protocol = protocol;
|
|
i.ietf_version_or_minus_one = ietf_version_or_minus_one;
|
|
i.userdata = NULL;
|
|
|
|
return lws_client_connect_via_info(&i);
|
|
}
|
|
|
|
#if defined(LWS_WITH_SOCKS5)
|
|
void socks_generate_msg(struct lws *wsi, enum socks_msg_type type,
|
|
ssize_t *msg_len)
|
|
{
|
|
struct lws_context *context = wsi->context;
|
|
struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
|
|
ssize_t len = 0, n, passwd_len;
|
|
short net_num;
|
|
char *p;
|
|
|
|
switch (type) {
|
|
case SOCKS_MSG_GREETING:
|
|
/* socks version, version 5 only */
|
|
pt->serv_buf[len++] = SOCKS_VERSION_5;
|
|
/* number of methods */
|
|
pt->serv_buf[len++] = 2;
|
|
/* username password method */
|
|
pt->serv_buf[len++] = SOCKS_AUTH_USERNAME_PASSWORD;
|
|
/* no authentication method */
|
|
pt->serv_buf[len++] = SOCKS_AUTH_NO_AUTH;
|
|
break;
|
|
|
|
case SOCKS_MSG_USERNAME_PASSWORD:
|
|
n = strlen(wsi->vhost->socks_user);
|
|
passwd_len = strlen(wsi->vhost->socks_password);
|
|
|
|
/* the subnegotiation version */
|
|
pt->serv_buf[len++] = SOCKS_SUBNEGOTIATION_VERSION_1;
|
|
/* length of the user name */
|
|
pt->serv_buf[len++] = n;
|
|
/* user name */
|
|
strncpy((char *)&pt->serv_buf[len], wsi->vhost->socks_user,
|
|
context->pt_serv_buf_size - len);
|
|
len += n;
|
|
/* length of the password */
|
|
pt->serv_buf[len++] = passwd_len;
|
|
/* password */
|
|
strncpy((char *)&pt->serv_buf[len], wsi->vhost->socks_password,
|
|
context->pt_serv_buf_size - len);
|
|
len += passwd_len;
|
|
break;
|
|
|
|
case SOCKS_MSG_CONNECT:
|
|
p = (char*)&net_num;
|
|
|
|
/* socks version */
|
|
pt->serv_buf[len++] = SOCKS_VERSION_5;
|
|
/* socks command */
|
|
pt->serv_buf[len++] = SOCKS_COMMAND_CONNECT;
|
|
/* reserved */
|
|
pt->serv_buf[len++] = 0;
|
|
/* address type */
|
|
pt->serv_buf[len++] = SOCKS_ATYP_DOMAINNAME;
|
|
/* skip length, we fill it in at the end */
|
|
n = len++;
|
|
|
|
/* the address we tell SOCKS proxy to connect to */
|
|
strncpy((char *)&(pt->serv_buf[len]), wsi->u.hdr.stash->address,
|
|
context->pt_serv_buf_size - len);
|
|
len += strlen(wsi->u.hdr.stash->address);
|
|
net_num = htons(wsi->c_port);
|
|
|
|
/* the port we tell SOCKS proxy to connect to */
|
|
pt->serv_buf[len++] = p[0];
|
|
pt->serv_buf[len++] = p[1];
|
|
|
|
/* the length of the address, excluding port */
|
|
pt->serv_buf[n] = strlen(wsi->u.hdr.stash->address);
|
|
break;
|
|
|
|
default:
|
|
return;
|
|
}
|
|
|
|
*msg_len = len;
|
|
}
|
|
#endif
|