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https://github.com/warmcat/libwebsockets.git
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edd7efd43d
During client redirect we "reset" the wsi to the redirect address, involving closing the current fd that was told to redirect (it will usually be a completely different server or port). With libuv and its two-stage close that's not trivial. This solves the problem we will "reset" (overwrite) where the handle lives in the wsi with new a new connection / handle by having it copied out into an allocated watcher struct, which is freed in the uv close callback. To confirm it the minimal ws client example gets some new options, the original problem was replicated with this $ lws-minimal-ws-client-echo -s invalid.url.com -p 80 https://github.com/warmcat/libwebsockets/issues/1390
150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/*
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* lws-minimal-ws-client-echo
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*
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* Copyright (C) 2018 Andy Green <andy@warmcat.com>
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*
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* This file is made available under the Creative Commons CC0 1.0
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* Universal Public Domain Dedication.
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*
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* This demonstrates a ws client that echoes back what it was sent, in a
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* way compatible with autobahn -m fuzzingserver
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*/
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#include <libwebsockets.h>
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#include <string.h>
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#include <signal.h>
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#define LWS_PLUGIN_STATIC
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#include "protocol_lws_minimal_client_echo.c"
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static struct lws_protocols protocols[] = {
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LWS_PLUGIN_PROTOCOL_MINIMAL_CLIENT_ECHO,
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{ NULL, NULL, 0, 0 } /* terminator */
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};
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static struct lws_context *context;
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static int interrupted, port = 7681, options = 0;
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static const char *url = "/", *ads = "localhost";
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/* pass pointers to shared vars to the protocol */
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static const struct lws_protocol_vhost_options pvo_ads = {
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NULL,
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NULL,
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"ads", /* pvo name */
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(void *)&ads /* pvo value */
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};
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static const struct lws_protocol_vhost_options pvo_url = {
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&pvo_ads,
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NULL,
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"url", /* pvo name */
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(void *)&url /* pvo value */
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};
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static const struct lws_protocol_vhost_options pvo_options = {
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&pvo_url,
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NULL,
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"options", /* pvo name */
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(void *)&options /* pvo value */
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};
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static const struct lws_protocol_vhost_options pvo_port = {
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&pvo_options,
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NULL,
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"port", /* pvo name */
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(void *)&port /* pvo value */
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};
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static const struct lws_protocol_vhost_options pvo_interrupted = {
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&pvo_port,
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NULL,
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"interrupted", /* pvo name */
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(void *)&interrupted /* pvo value */
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};
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static const struct lws_protocol_vhost_options pvo = {
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NULL, /* "next" pvo linked-list */
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&pvo_interrupted, /* "child" pvo linked-list */
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"lws-minimal-client-echo", /* protocol name we belong to on this vhost */
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"" /* ignored */
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};
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static const struct lws_extension extensions[] = {
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{
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"permessage-deflate",
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lws_extension_callback_pm_deflate,
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"permessage-deflate"
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"; client_no_context_takeover"
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"; client_max_window_bits"
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},
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{ NULL, NULL, NULL /* terminator */ }
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};
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void sigint_handler(int sig)
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{
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interrupted = 1;
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}
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int main(int argc, const char **argv)
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{
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struct lws_context_creation_info info;
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const char *p;
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int logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
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/* for LLL_ verbosity above NOTICE to be built into lws,
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* lws must have been configured and built with
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* -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
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/* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
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/* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
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/* | LLL_DEBUG */;
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if ((p = lws_cmdline_option(argc, argv, "-d")))
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logs = atoi(p);
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lws_set_log_level(logs, NULL);
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lwsl_user("LWS minimal ws client echo + permessage-deflate + multifragment bulk message\n");
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lwsl_user(" lws-minimal-ws-client-echo [-n (no exts)] [-u url] [-p port] [-o (once)]\n");
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if ((p = lws_cmdline_option(argc, argv, "-u")))
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url = p;
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if ((p = lws_cmdline_option(argc, argv, "-p")))
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port = atoi(p);
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if (lws_cmdline_option(argc, argv, "-o"))
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options |= 1;
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if ((p = lws_cmdline_option(argc, argv, "-s")))
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ads = p;
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lwsl_user("options %d, ads %s\n", options, ads);
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memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
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info.port = CONTEXT_PORT_NO_LISTEN;
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info.protocols = protocols;
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info.pvo = &pvo;
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if (!lws_cmdline_option(argc, argv, "-n"))
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info.extensions = extensions;
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info.pt_serv_buf_size = 32 * 1024;
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info.options = LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT |
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LWS_SERVER_OPTION_VALIDATE_UTF8;
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if (lws_cmdline_option(argc, argv, "--libuv"))
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info.options |= LWS_SERVER_OPTION_LIBUV;
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else
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signal(SIGINT, sigint_handler);
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context = lws_create_context(&info);
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if (!context) {
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lwsl_err("lws init failed\n");
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return 1;
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}
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while (!lws_service(context, 1000) && !interrupted)
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;
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lws_context_destroy(context);
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lwsl_user("Completed %s\n", interrupted == 2 ? "OK" : "failed");
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return interrupted != 2;
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}
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