+++ /dev/null
-/*
- * libwebsockets-test-server-extpoll - libwebsockets external poll loop sample
- *
- * This acts the same as libwebsockets-test-server but works with the poll
- * loop taken out of libwebsockets and into this app. It's an example of how
- * you can integrate libwebsockets polling into an app that already has its
- * own poll loop.
- *
- * Copyright (C) 2010-2011 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 <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <getopt.h>
-#include <string.h>
-#include <sys/time.h>
-#ifdef __MINGW32__
-#include "../win32port/win32helpers/websock-w32.h"
-#else
-#ifdef __MINGW64__
-#include "../win32port/win32helpers/websock-w32.h"
-#else
-#include <poll.h>
-#endif
-#endif
-
-#include "../lib/libwebsockets.h"
-
-
-/*
- * This demo server shows how to use libwebsockets for one or more
- * websocket protocols in the same server
- *
- * It defines the following websocket protocols:
- *
- * dumb-increment-protocol: once the socket is opened, an incrementing
- * ascii string is sent down it every 50ms.
- * If you send "reset\n" on the websocket, then
- * the incrementing number is reset to 0.
- *
- * lws-mirror-protocol: copies any received packet to every connection also
- * using this protocol, including the sender
- */
-
-#define MAX_POLL_ELEMENTS 100
-struct pollfd pollfds[100];
-int count_pollfds = 0;
-
-
-
-enum demo_protocols {
- /* always first */
- PROTOCOL_HTTP = 0,
-
- PROTOCOL_DUMB_INCREMENT,
- PROTOCOL_LWS_MIRROR,
-
- /* always last */
- DEMO_PROTOCOL_COUNT
-};
-
-
-#define LOCAL_RESOURCE_PATH INSTALL_DATADIR"/libwebsockets-test-server"
-
-/* this protocol server (always the first one) just knows how to do HTTP */
-
-static int callback_http(struct libwebsocket_context * this,
- struct libwebsocket *wsi,
- enum libwebsocket_callback_reasons reason, void *user,
- void *in, size_t len)
-{
- int n;
- char client_name[128];
- char client_ip[128];
-
- switch (reason) {
- case LWS_CALLBACK_HTTP:
- fprintf(stderr, "serving HTTP URI %s\n", (char *)in);
-
- if (in && strcmp(in, "/favicon.ico") == 0) {
- if (libwebsockets_serve_http_file(wsi,
- LOCAL_RESOURCE_PATH"/favicon.ico", "image/x-icon"))
- fprintf(stderr, "Failed to send favicon\n");
- break;
- }
-
- /* send the script... when it runs it'll start websockets */
-
- if (libwebsockets_serve_http_file(wsi,
- LOCAL_RESOURCE_PATH"/test.html", "text/html"))
- fprintf(stderr, "Failed to send HTTP file\n");
- /* we are done with this connnection */
- return 1;
-
- /*
- * callback for confirming to continue with client IP appear in
- * protocol 0 callback since no websocket protocol has been agreed
- * yet. You can just ignore this if you won't filter on client IP
- * since the default uhandled callback return is 0 meaning let the
- * connection continue.
- */
-
- case LWS_CALLBACK_FILTER_NETWORK_CONNECTION:
-
- libwebsockets_get_peer_addresses((int)(long)user, client_name,
- sizeof(client_name), client_ip, sizeof(client_ip));
-
- fprintf(stderr, "Received network connect from %s (%s)\n",
- client_name, client_ip);
-
- /* if we returned non-zero from here, we kill the connection */
- break;
-
- /*
- * callbacks for managing the external poll() array appear in
- * protocol 0 callback
- */
-
- case LWS_CALLBACK_ADD_POLL_FD:
- pollfds[count_pollfds].fd = (int)(long)user;
- pollfds[count_pollfds].events = (int)len;
- pollfds[count_pollfds++].revents = 0;
- break;
-
- case LWS_CALLBACK_DEL_POLL_FD:
- for (n = 0; n < count_pollfds; n++) {
- if (pollfds[n].fd != (int)(long)user)
- continue;
- /*
- * swap the end guy into our vacant slot...
- * works ok if n is the end guy
- */
- pollfds[n] = pollfds[count_pollfds - 1];
- pollfds[count_pollfds - 1].fd = -1;
- count_pollfds--;
- break;
- }
- break;
-
- case LWS_CALLBACK_SET_MODE_POLL_FD:
- for (n = 0; n < count_pollfds; n++)
- if (pollfds[n].fd == (int)(long)user)
- pollfds[n].events |= (int)(long)len;
- break;
-
- case LWS_CALLBACK_CLEAR_MODE_POLL_FD:
- for (n = 0; n < count_pollfds; n++)
- if (pollfds[n].fd == (int)(long)user)
- pollfds[n].events &= ~(int)(long)len;
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-/*
- * this is just an example of parsing handshake headers, you don't need this
- * in your code unless you will filter allowing connections by the header
- * content
- */
-
-static void
-dump_handshake_info(struct lws_tokens *lwst)
-{
- int n;
- static const char *token_names[] = {
- [WSI_TOKEN_GET_URI] = "GET URI",
- [WSI_TOKEN_HOST] = "Host",
- [WSI_TOKEN_CONNECTION] = "Connection",
- [WSI_TOKEN_KEY1] = "key 1",
- [WSI_TOKEN_KEY2] = "key 2",
- [WSI_TOKEN_PROTOCOL] = "Protocol",
- [WSI_TOKEN_UPGRADE] = "Upgrade",
- [WSI_TOKEN_ORIGIN] = "Origin",
- [WSI_TOKEN_DRAFT] = "Draft",
- [WSI_TOKEN_CHALLENGE] = "Challenge",
-
- /* new for 04 */
- [WSI_TOKEN_KEY] = "Key",
- [WSI_TOKEN_VERSION] = "Version",
- [WSI_TOKEN_SWORIGIN] = "Sworigin",
-
- /* new for 05 */
- [WSI_TOKEN_EXTENSIONS] = "Extensions",
-
- /* client receives these */
- [WSI_TOKEN_ACCEPT] = "Accept",
- [WSI_TOKEN_NONCE] = "Nonce",
- [WSI_TOKEN_HTTP] = "Http",
- [WSI_TOKEN_MUXURL] = "MuxURL",
- };
-
- for (n = 0; n < WSI_TOKEN_COUNT; n++) {
- if (lwst[n].token == NULL)
- continue;
-
- fprintf(stderr, " %s = %s\n", token_names[n], lwst[n].token);
- }
-}
-
-/* dumb_increment protocol */
-
-/*
- * one of these is auto-created for each connection and a pointer to the
- * appropriate instance is passed to the callback in the user parameter
- *
- * for this example protocol we use it to individualize the count for each
- * connection.
- */
-
-struct per_session_data__dumb_increment {
- int number;
-};
-
-static int
-callback_dumb_increment(struct libwebsocket_context * this,
- struct libwebsocket *wsi,
- enum libwebsocket_callback_reasons reason,
- void *user, void *in, size_t len)
-{
- int n;
- unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 512 +
- LWS_SEND_BUFFER_POST_PADDING];
- unsigned char *p = &buf[LWS_SEND_BUFFER_PRE_PADDING];
- struct per_session_data__dumb_increment *pss = user;
-
- switch (reason) {
-
- case LWS_CALLBACK_ESTABLISHED:
- pss->number = 0;
- break;
-
- /*
- * in this protocol, we just use the broadcast action as the chance to
- * send our own connection-specific data and ignore the broadcast info
- * that is available in the 'in' parameter
- */
-
- case LWS_CALLBACK_BROADCAST:
- n = sprintf((char *)p, "%d", pss->number++);
- n = libwebsocket_write(wsi, p, n, LWS_WRITE_TEXT);
- if (n < 0) {
- fprintf(stderr, "ERROR %d writing to socket\n", n);
- return 1;
- }
- break;
-
- case LWS_CALLBACK_RECEIVE:
- fprintf(stderr, "rx %d\n", (int)len);
- if (len < 6)
- break;
- if (strcmp(in, "reset\n") == 0)
- pss->number = 0;
- break;
-
- /*
- * this just demonstrates how to use the protocol filter. If you won't
- * study and reject connections based on header content, you don't need
- * to handle this callback
- */
-
- case LWS_CALLBACK_FILTER_PROTOCOL_CONNECTION:
- dump_handshake_info((struct lws_tokens *)(long)user);
- /* you could return non-zero here and kill the connection */
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-
-/* lws-mirror_protocol */
-
-#define MAX_MESSAGE_QUEUE 64
-
-struct per_session_data__lws_mirror {
- struct libwebsocket *wsi;
- int ringbuffer_tail;
-};
-
-struct a_message {
- void *payload;
- size_t len;
-};
-
-static struct a_message ringbuffer[MAX_MESSAGE_QUEUE];
-static int ringbuffer_head;
-
-
-static int
-callback_lws_mirror(struct libwebsocket_context * this,
- struct libwebsocket *wsi,
- enum libwebsocket_callback_reasons reason,
- void *user, void *in, size_t len)
-{
- int n;
- struct per_session_data__lws_mirror *pss = user;
-
- switch (reason) {
-
- case LWS_CALLBACK_ESTABLISHED:
- pss->ringbuffer_tail = ringbuffer_head;
- pss->wsi = wsi;
- libwebsocket_callback_on_writable(this, wsi);
- break;
-
- case LWS_CALLBACK_SERVER_WRITEABLE:
-
- if (pss->ringbuffer_tail != ringbuffer_head) {
-
- n = libwebsocket_write(wsi, (unsigned char *)
- ringbuffer[pss->ringbuffer_tail].payload +
- LWS_SEND_BUFFER_PRE_PADDING,
- ringbuffer[pss->ringbuffer_tail].len,
- LWS_WRITE_TEXT);
-
- if (n < 0) {
- fprintf(stderr, "ERROR %d writing to socket\n", n);
- exit(1);
- }
-
- if (pss->ringbuffer_tail == (MAX_MESSAGE_QUEUE - 1))
- pss->ringbuffer_tail = 0;
- else
- pss->ringbuffer_tail++;
-
- if (((ringbuffer_head - pss->ringbuffer_tail) %
- MAX_MESSAGE_QUEUE) < (MAX_MESSAGE_QUEUE - 15))
- libwebsocket_rx_flow_control(wsi, 1);
-
- libwebsocket_callback_on_writable(this, wsi);
-
- }
- break;
-
- case LWS_CALLBACK_BROADCAST:
- n = libwebsocket_write(wsi, in, len, LWS_WRITE_TEXT);
- if (n < 0)
- fprintf(stderr, "mirror write failed\n");
- break;
-
- case LWS_CALLBACK_RECEIVE:
-
- if (ringbuffer[ringbuffer_head].payload)
- free(ringbuffer[ringbuffer_head].payload);
-
- ringbuffer[ringbuffer_head].payload =
- malloc(LWS_SEND_BUFFER_PRE_PADDING + len +
- LWS_SEND_BUFFER_POST_PADDING);
- ringbuffer[ringbuffer_head].len = len;
- memcpy((char *)ringbuffer[ringbuffer_head].payload +
- LWS_SEND_BUFFER_PRE_PADDING, in, len);
- if (ringbuffer_head == (MAX_MESSAGE_QUEUE - 1))
- ringbuffer_head = 0;
- else
- ringbuffer_head++;
-
- if (((ringbuffer_head - pss->ringbuffer_tail) %
- MAX_MESSAGE_QUEUE) > (MAX_MESSAGE_QUEUE - 10))
- libwebsocket_rx_flow_control(wsi, 0);
-
- libwebsocket_callback_on_writable_all_protocol(
- libwebsockets_get_protocol(wsi));
- break;
-
- /*
- * this just demonstrates how to use the protocol filter. If you won't
- * study and reject connections based on header content, you don't need
- * to handle this callback
- */
-
- case LWS_CALLBACK_FILTER_PROTOCOL_CONNECTION:
- dump_handshake_info((struct lws_tokens *)(long)user);
- /* you could return non-zero here and kill the connection */
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-
-/* list of supported protocols and callbacks */
-
-static struct libwebsocket_protocols protocols[] = {
- /* first protocol must always be HTTP handler */
-
- {
- "http-only", /* name */
- callback_http, /* callback */
- 0 /* per_session_data_size */
- },
- {
- "dumb-increment-protocol",
- callback_dumb_increment,
- sizeof(struct per_session_data__dumb_increment),
- },
- {
- "lws-mirror-protocol",
- callback_lws_mirror,
- sizeof(struct per_session_data__lws_mirror)
- },
- {
- NULL, NULL, 0 /* End of list */
- }
-};
-
-static struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "debug", required_argument, NULL, 'd' },
- { "port", required_argument, NULL, 'p' },
- { "ssl", no_argument, NULL, 's' },
- { "killmask", no_argument, NULL, 'k' },
- { "interface", required_argument, NULL, 'i' },
- { NULL, 0, 0, 0 }
-};
-
-int main(int argc, char **argv)
-{
- int n = 0;
- const char *cert_path =
- LOCAL_RESOURCE_PATH"/libwebsockets-test-server.pem";
- const char *key_path =
- LOCAL_RESOURCE_PATH"/libwebsockets-test-server.key.pem";
- unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 1024 +
- LWS_SEND_BUFFER_POST_PADDING];
- int port = 7681;
- int use_ssl = 0;
- struct libwebsocket_context *context;
- int opts = 0;
- unsigned int oldus = 0;
- char interface_name[128] = "";
- const char *interface_ptr = NULL;
-
- fprintf(stderr, "libwebsockets test server with external poll()\n"
- "(C) Copyright 2010-2011 Andy Green <andy@warmcat.com> "
- "licensed under LGPL2.1\n");
-
- while (n >= 0) {
- n = getopt_long(argc, argv, "i:khsp:d:", options, NULL);
- if (n < 0)
- continue;
- switch (n) {
- case 'd':
- lws_set_log_level(atoi(optarg), NULL);
- break;
- case 's':
- use_ssl = 1;
- break;
- case 'k':
- opts = LWS_SERVER_OPTION_DEFEAT_CLIENT_MASK;
- break;
- case 'p':
- port = atoi(optarg);
- break;
- case 'i':
- strncpy(interface_name, optarg, sizeof interface_name);
- interface_name[(sizeof interface_name) - 1] = '\0';
- interface_ptr = interface_name;
- break;
- case 'h':
- fprintf(stderr, "Usage: test-server "
- "[--port=<p>] [--ssl] "
- "[-d <log bitfield>]\n");
- exit(1);
- }
- }
-
- if (!use_ssl)
- cert_path = key_path = NULL;
-
- context = libwebsocket_create_context(port, interface_ptr, protocols,
- libwebsocket_internal_extensions,
- cert_path, key_path, NULL, -1, -1,
- opts, NULL);
- if (context == NULL) {
- fprintf(stderr, "libwebsocket init failed\n");
- return -1;
- }
-
- buf[LWS_SEND_BUFFER_PRE_PADDING] = 'x';
-
- /*
- * This is an example of an existing application's explicit poll()
- * loop that libwebsockets can integrate with.
- */
-
- while (1) {
- struct timeval tv;
-
- /*
- * this represents an existing server's single poll action
- * which also includes libwebsocket sockets
- */
-
- n = poll(pollfds, count_pollfds, 25);
- if (n < 0)
- goto done;
-
- if (n)
- for (n = 0; n < count_pollfds; n++)
- if (pollfds[n].revents)
- /*
- * returns immediately if the fd does not
- * match anything under libwebsockets
- * control
- */
- if (libwebsocket_service_fd(context,
- &pollfds[n]))
- goto done;
-
- /* do our broadcast periodically */
-
- gettimeofday(&tv, NULL);
-
- /*
- * This broadcasts to all dumb-increment-protocol connections
- * at 20Hz.
- *
- * We're just sending a character 'x', in these examples the
- * callbacks send their own per-connection content.
- *
- * You have to send something with nonzero length to get the
- * callback actions delivered.
- *
- * We take care of pre-and-post padding allocation.
- */
-
- if (((unsigned int)tv.tv_usec - oldus) > 50000) {
- libwebsockets_broadcast(
- &protocols[PROTOCOL_DUMB_INCREMENT],
- &buf[LWS_SEND_BUFFER_PRE_PADDING], 1);
- oldus = tv.tv_usec;
- }
- }
-
-done:
- libwebsocket_context_destroy(context);
-
- return 0;
-}
projects / profile / ivi / libwebsockets.git / commitdiff