mirror of
https://github.com/zotanmew/nginx-rtmp-module.git
synced 2024-06-10 09:39:33 +02:00
1233 lines
31 KiB
C
1233 lines
31 KiB
C
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/*
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* Copyright (c) 2012 Roman Arutyunyan
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_event.h>
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#include <strings.h>
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#include "ngx_rtmp.h"
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#include "ngx_rtmp_amf0.h"
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static void ngx_rtmp_init_session(ngx_connection_t *c);
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static void ngx_rtmp_handshake_recv(ngx_event_t *rev);
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static void ngx_rtmp_handshake_send(ngx_event_t *rev);
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static void ngx_rtmp_recv(ngx_event_t *rev);
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static void ngx_rtmp_send(ngx_event_t *rev);
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static ngx_int_t ngx_rtmp_receive_message(ngx_rtmp_session_t *s,
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ngx_rtmp_header_t *h, ngx_chain_t *in);
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#ifdef NGX_DEBUG
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char*
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ngx_rtmp_message_type(uint8_t type) {
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static char* types[] = {
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"?",
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"chunk_size",
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"abort",
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"ack",
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"user",
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"ack_size",
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"bandwidth",
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"edge",
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"audio",
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"video",
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"?",
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"?",
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"?",
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"?",
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"?",
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"amf3_meta",
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"amf3_shared",
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"amd3_cmd",
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"amf0_meta",
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"amf0_shared",
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"amf0_cmd",
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"?",
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"aggregate"
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};
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return type < sizeof(types) / sizeof(types[0])
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? types[type]
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: "?";
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}
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char*
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ngx_rtmp_user_message_type(uint16_t evt) {
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static char* evts[] = {
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"stream_begin",
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"stream_eof",
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"stream dry",
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"set_buflen",
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"recorded",
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"ping_request",
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"ping_response",
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};
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return evt < sizeof(evts) / sizeof(evts[0])
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? evts[evt]
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: "?";
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}
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#endif
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void
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ngx_rtmp_init_connection(ngx_connection_t *c)
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{
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ngx_uint_t i;
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ngx_rtmp_port_t *port;
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struct sockaddr *sa;
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struct sockaddr_in *sin;
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ngx_rtmp_log_ctx_t *ctx;
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ngx_rtmp_in_addr_t *addr;
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ngx_rtmp_session_t *s;
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ngx_rtmp_addr_conf_t *addr_conf;
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#if (NGX_HAVE_INET6)
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struct sockaddr_in6 *sin6;
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ngx_rtmp_in6_addr_t *addr6;
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#endif
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/* find the server configuration for the address:port */
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/* AF_INET only */
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port = c->listening->servers;
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if (port->naddrs > 1) {
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/*
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* There are several addresses on this port and one of them
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* is the "*:port" wildcard so getsockname() is needed to determine
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* the server address.
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*
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* AcceptEx() already gave this address.
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*/
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if (ngx_connection_local_sockaddr(c, NULL, 0) != NGX_OK) {
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ngx_rtmp_close_connection(c);
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return;
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}
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sa = c->local_sockaddr;
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switch (sa->sa_family) {
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#if (NGX_HAVE_INET6)
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case AF_INET6:
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sin6 = (struct sockaddr_in6 *) sa;
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addr6 = port->addrs;
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/* the last address is "*" */
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for (i = 0; i < port->naddrs - 1; i++) {
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if (ngx_memcmp(&addr6[i].addr6, &sin6->sin6_addr, 16) == 0) {
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break;
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}
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}
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addr_conf = &addr6[i].conf;
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break;
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#endif
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default: /* AF_INET */
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sin = (struct sockaddr_in *) sa;
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addr = port->addrs;
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/* the last address is "*" */
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for (i = 0; i < port->naddrs - 1; i++) {
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if (addr[i].addr == sin->sin_addr.s_addr) {
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break;
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}
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}
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addr_conf = &addr[i].conf;
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break;
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}
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} else {
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switch (c->local_sockaddr->sa_family) {
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#if (NGX_HAVE_INET6)
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case AF_INET6:
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addr6 = port->addrs;
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addr_conf = &addr6[0].conf;
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break;
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#endif
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default: /* AF_INET */
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addr = port->addrs;
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addr_conf = &addr[0].conf;
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break;
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}
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}
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s = ngx_pcalloc(c->pool, sizeof(ngx_rtmp_session_t));
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if (s == NULL) {
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ngx_rtmp_close_connection(c);
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return;
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}
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s->main_conf = addr_conf->ctx->main_conf;
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s->srv_conf = addr_conf->ctx->srv_conf;
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s->addr_text = &addr_conf->addr_text;
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c->data = s;
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s->connection = c;
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ngx_log_error(NGX_LOG_INFO, c->log, 0, "*%ui client connected",
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c->number, &c->addr_text);
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ctx = ngx_palloc(c->pool, sizeof(ngx_rtmp_log_ctx_t));
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if (ctx == NULL) {
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ngx_rtmp_close_connection(c);
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return;
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}
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ctx->client = &c->addr_text;
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ctx->session = s;
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c->log->connection = c->number;
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c->log->handler = ngx_rtmp_log_error;
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c->log->data = ctx;
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c->log->action = "sending client greeting line";
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c->log_error = NGX_ERROR_INFO;
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ngx_rtmp_init_session(c);
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}
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static void
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ngx_rtmp_init_session(ngx_connection_t *c)
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{
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ngx_rtmp_session_t *s;
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ngx_rtmp_core_main_conf_t *cmcf;
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ngx_rtmp_core_srv_conf_t *cscf;
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ngx_buf_t *b;
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size_t n, size;
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ngx_rtmp_handler_pt *h;
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ngx_array_t *ch;
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s = c->data;
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cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
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s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_rtmp_max_module);
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if (s->ctx == NULL) {
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ngx_rtmp_close_connection(c);
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return;
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}
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s->in_streams = ngx_pcalloc(c->pool, sizeof(ngx_rtmp_stream_t)
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* cscf->max_streams);
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if (s->in_streams == NULL) {
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ngx_rtmp_close_connection(c);
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return;
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}
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size = NGX_RTMP_HANDSHAKE_SIZE + 1;
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s->in_chunk_size = NGX_RTMP_DEFAULT_CHUNK_SIZE;
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s->in_pool = ngx_create_pool(4096/*2 * size + sizeof(ngx_pool_t)*/, c->log);
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/* start handshake */
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b = &s->hs_in_buf;
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b->start = b->pos = b->last = ngx_pcalloc(s->in_pool, size);
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b->end = b->start + size;
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b->temporary = 1;
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b = &s->hs_out_buf;
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b->start = b->pos = b->last = ngx_pcalloc(s->in_pool, size);
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b->end = b->start + size;
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b->temporary = 1;
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c->write->handler = ngx_rtmp_handshake_send;
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c->read->handler = ngx_rtmp_handshake_recv;
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/* call connect callbacks */
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cmcf = ngx_rtmp_get_module_main_conf(s, ngx_rtmp_core_module);
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ch = &cmcf->events[NGX_RTMP_CONNECT];
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h = ch->elts;
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for(n = 0; n < ch->nelts; ++n, ++h) {
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if (*h) {
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if ((*h)(s, NULL, NULL) != NGX_OK) {
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ngx_rtmp_close_connection(c);
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return;
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}
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}
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}
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ngx_rtmp_handshake_recv(c->read);
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}
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uint32_t
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ngx_rtmp_get_timestamp()
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{
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ngx_time_t *tod;
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tod = ngx_timeofday();
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/* FIXME: divisor */
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return (uint32_t)(tod->sec * 1000 + tod->msec) /*& 0x00ffffff*/;
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}
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void
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ngx_rtmp_handshake_recv(ngx_event_t *rev)
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{
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ssize_t n;
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ngx_connection_t *c;
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ngx_rtmp_session_t *s;
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ngx_rtmp_core_srv_conf_t *cscf;
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ngx_buf_t *b;
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u_char *p;
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c = rev->data;
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s = c->data;
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cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
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if (c->destroyed) {
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return;
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}
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if (rev->timedout) {
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ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
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c->timedout = 1;
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ngx_rtmp_close_connection(c);
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return;
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}
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if (rev->timer_set) {
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ngx_del_timer(rev);
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}
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b = (s->hs_stage == NGX_RTMP_HS_READ_DATA)
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? &s->hs_in_buf
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: &s->hs_out_buf;
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while (b->last != b->end) {
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n = c->recv(c, b->last, b->end - b->last);
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if (n == NGX_ERROR || n == 0) {
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ngx_rtmp_close_connection(c);
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return;
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}
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if (n == NGX_AGAIN) {
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ngx_add_timer(rev, cscf->timeout);
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if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
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ngx_rtmp_close_connection(c);
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}
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return;
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}
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b->last += n;
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}
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ngx_del_event(c->read, NGX_READ_EVENT, 0);
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++s->hs_stage;
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if (s->hs_stage == NGX_RTMP_HS_WRITE_DATA) {
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if (*b->pos != NGX_RTMP_VERSION) {
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ngx_log_error(NGX_LOG_INFO, c->log, NGX_ERROR,
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"invalid handshake signature");
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ngx_rtmp_close_connection(c);
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return;
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}
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/* version is never needed anymore */
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++b->pos;
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/* store current time as our epoch */
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s->epoch = ngx_rtmp_get_timestamp();
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/* read client epoch */
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p = (u_char*)&s->peer_epoch;
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*p++ = b->pos[3];
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*p++ = b->pos[2];
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*p++ = b->pos[1];
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*p++ = b->pos[0];
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/* prepare output signature:
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* set version, set epoch, fill zeroes */
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p = (u_char*)&s->epoch;
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b = &s->hs_out_buf;
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b->pos[0] = NGX_RTMP_VERSION;
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b->pos[4] = *p++;
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b->pos[3] = *p++;
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b->pos[2] = *p++;
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b->pos[1] = *p++;
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b->pos[5] = b->pos[6] = b->pos[7] = b->pos[8] = 0;
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for(b->last = b->pos + 9, n = 1;
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b->last < b->end;
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++b->last, ++n)
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{
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*b->last = (u_char)(n & 0xff);
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}
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/* reply timestamp is the same as out epoch */
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/*ngx_memcpy(s->hs_in_buf.pos + 4, b->pos + 1, 4);*/
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ngx_rtmp_handshake_send(c->write);
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return;
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}
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/* handshake done */
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ngx_reset_pool(s->in_pool);
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c->read->handler = ngx_rtmp_recv;
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c->write->handler = ngx_rtmp_send;
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ngx_log_debug2(NGX_LOG_DEBUG_RTMP, c->log, 0,
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"RTMP handshake done; epoch=%uD peer_epoch=%uD",
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s->epoch, s->peer_epoch);
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ngx_rtmp_recv(rev);
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}
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void
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ngx_rtmp_handshake_send(ngx_event_t *wev)
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{
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ngx_int_t n;
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ngx_connection_t *c;
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ngx_rtmp_session_t *s;
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ngx_rtmp_core_srv_conf_t *cscf;
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ngx_buf_t *b;
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c = wev->data;
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s = c->data;
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cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
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if (c->destroyed) {
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return;
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}
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if (wev->timedout) {
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ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
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"client timed out");
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c->timedout = 1;
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ngx_rtmp_close_connection(c);
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return;
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}
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if (wev->timer_set) {
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ngx_del_timer(wev);
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}
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restart:
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b = (s->hs_stage == NGX_RTMP_HS_WRITE_DATA)
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? &s->hs_out_buf
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: &s->hs_in_buf;
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while(b->pos != b->last) {
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n = c->send(c, b->pos, b->last - b->pos);
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if (n == NGX_ERROR) {
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ngx_rtmp_close_connection(c);
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return;
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}
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if (n == NGX_AGAIN || n == 0) {
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ngx_add_timer(c->write, cscf->timeout);
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if (ngx_handle_write_event(c->write, 0) != NGX_OK) {
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ngx_rtmp_close_connection(c);
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return;
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}
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}
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b->pos += n;
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}
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++s->hs_stage;
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if (s->hs_stage == NGX_RTMP_HS_WRITE_ECHO) {
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goto restart;
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}
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ngx_del_event(wev, NGX_WRITE_EVENT, 0);
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b = &s->hs_out_buf;
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b->pos = b->last = b->start + 1;
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ngx_rtmp_handshake_recv(c->read);
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}
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void
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ngx_rtmp_recv(ngx_event_t *rev)
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{
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ngx_int_t n;
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ngx_connection_t *c;
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ngx_rtmp_session_t *s;
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ngx_rtmp_core_srv_conf_t *cscf;
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ngx_rtmp_header_t *h;
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ngx_rtmp_stream_t *st, *st0;
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ngx_chain_t *in, *head;
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ngx_buf_t *b;
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u_char *p, *pp, *old_pos;
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size_t size, fsize, old_size;
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uint8_t fmt;
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uint32_t csid, timestamp;
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c = rev->data;
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s = c->data;
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b = NULL;
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old_pos = NULL;
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old_size = 0;
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cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
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if (c->destroyed) {
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return;
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}
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for( ;; ) {
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st = &s->in_streams[s->in_csid];
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/* allocate new buffer */
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if (st->in == NULL) {
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if ((st->in = ngx_alloc_chain_link(s->in_pool)) == NULL
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|| (st->in->buf = ngx_calloc_buf(s->in_pool)) == NULL)
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{
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ngx_log_error(NGX_LOG_INFO, c->log, NGX_ERROR,
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"chain alloc failed");
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ngx_rtmp_close_connection(c);
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return;
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}
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ngx_log_debug2(NGX_LOG_DEBUG_RTMP, c->log, 0,
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"allocating input buffer %p : %p",
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st->in, st->in->buf);
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st->in->next = NULL;
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b = st->in->buf;
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size = s->in_chunk_size + NGX_RTMP_MAX_CHUNK_HEADER;
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b->start = b->last = b->pos = ngx_palloc(s->in_pool, size);
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if (b->start == NULL) {
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ngx_log_error(NGX_LOG_INFO, c->log, NGX_ERROR,
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"buf alloc failed");
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ngx_rtmp_close_connection(c);
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return;
|
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}
|
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b->end = b->start + size;
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}
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h = &st->hdr;
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in = st->in;
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b = in->buf;
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|
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if (old_size) {
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|
|
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"reusing formerly read data: %d", old_size);
|
|
|
|
b->pos = b->start;
|
|
b->last = ngx_movemem(b->pos, old_pos, old_size);
|
|
|
|
} else {
|
|
|
|
if (old_pos) {
|
|
b->pos = b->last = b->start;
|
|
}
|
|
|
|
n = c->recv(c, b->last, b->end - b->last);
|
|
|
|
if (n == NGX_ERROR || n == 0) {
|
|
ngx_rtmp_close_connection(c);
|
|
return;
|
|
}
|
|
|
|
if (n == NGX_AGAIN) {
|
|
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
|
|
ngx_rtmp_close_connection(c);
|
|
}
|
|
return;
|
|
}
|
|
|
|
b->last += n;
|
|
s->in_bytes += n;
|
|
|
|
if (s->in_bytes - s->in_last_ack >= cscf->ack_window) {
|
|
|
|
s->in_last_ack = s->in_bytes;
|
|
|
|
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"sending RTMP ACK(%D)", s->in_bytes);
|
|
|
|
if (ngx_rtmp_send_ack(s, s->in_bytes)) {
|
|
ngx_rtmp_close_connection(c);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
old_pos = NULL;
|
|
old_size = 0;
|
|
|
|
/* parse headers */
|
|
if (b->pos == b->start) {
|
|
p = b->pos;
|
|
|
|
/* chunk basic header */
|
|
fmt = (*p >> 6) & 0x03;
|
|
csid = *p++ & 0x3f;
|
|
|
|
if (csid == 0) {
|
|
if (b->last - p < 1)
|
|
continue;
|
|
csid = 64;
|
|
csid += *(uint8_t*)p++;
|
|
|
|
} else if (csid == 1) {
|
|
if (b->last - p < 2)
|
|
continue;
|
|
csid = 64;
|
|
csid += *(uint8_t*)p++;
|
|
csid += (uint32_t)256 * (*(uint8_t*)p++);
|
|
}
|
|
|
|
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"RTMP bheader fmt=%d csid=%D",
|
|
(int)fmt, csid);
|
|
|
|
if (csid >= cscf->max_streams) {
|
|
ngx_log_error(NGX_LOG_INFO, c->log, NGX_ERROR,
|
|
"RTMP in chunk stream too big: %D >= %D",
|
|
csid, cscf->max_streams);
|
|
ngx_rtmp_close_connection(c);
|
|
return;
|
|
}
|
|
|
|
/* link orphan */
|
|
if (s->in_csid == 0) {
|
|
|
|
/* unlink from stream #0 */
|
|
st->in = st->in->next;
|
|
|
|
/* link to new stream */
|
|
s->in_csid = csid;
|
|
st = &s->in_streams[csid];
|
|
if (st->in == NULL) {
|
|
in->next = in;
|
|
} else {
|
|
in->next = st->in->next;
|
|
st->in->next = in;
|
|
}
|
|
st->in = in;
|
|
h = &st->hdr;
|
|
h->csid = csid;
|
|
}
|
|
|
|
/* get previous header to inherit data from */
|
|
timestamp = h->timestamp;
|
|
|
|
if (fmt <= 2 ) {
|
|
if (b->last - p < 3)
|
|
continue;
|
|
/* timestamp:
|
|
* big-endian 3b -> little-endian 4b */
|
|
pp = (u_char*)×tamp;
|
|
pp[2] = *p++;
|
|
pp[1] = *p++;
|
|
pp[0] = *p++;
|
|
pp[3] = 0;
|
|
|
|
if (fmt <= 1) {
|
|
if (b->last - p < 4)
|
|
continue;
|
|
/* size:
|
|
* big-endian 3b -> little-endian 4b
|
|
* type:
|
|
* 1b -> 1b*/
|
|
pp = (u_char*)&h->mlen;
|
|
pp[2] = *p++;
|
|
pp[1] = *p++;
|
|
pp[0] = *p++;
|
|
pp[3] = 0;
|
|
h->type = *(uint8_t*)p++;
|
|
|
|
if (fmt == 0) {
|
|
if (b->last - p < 4)
|
|
continue;
|
|
/* stream:
|
|
* little-endian 4b -> little-endian 4b */
|
|
pp = (u_char*)&h->msid;
|
|
pp[0] = *p++;
|
|
pp[1] = *p++;
|
|
pp[2] = *p++;
|
|
pp[3] = *p++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* extended header */
|
|
if (timestamp >= 0x00ffffff) {
|
|
/* Messages with type=3 should
|
|
* never have ext timestamp field
|
|
* according to standard.
|
|
* However that's not always the case
|
|
* in real life */
|
|
if (fmt <= 2 || cscf->publish_time_fix) {
|
|
if (b->last - p < 4)
|
|
continue;
|
|
pp = (u_char*)×tamp;
|
|
pp[3] = *p++;
|
|
pp[2] = *p++;
|
|
pp[1] = *p++;
|
|
pp[0] = *p++;
|
|
}
|
|
}
|
|
|
|
if (fmt == 1 || fmt == 2) {
|
|
h->timestamp += timestamp;
|
|
} else {
|
|
h->timestamp = timestamp;
|
|
}
|
|
|
|
ngx_log_debug6(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"RTMP mheader %s (%d) "
|
|
"timestamp=%uD mlen=%D len=%D msid=%D",
|
|
ngx_rtmp_message_type(h->type), (int)h->type,
|
|
h->timestamp, h->mlen, st->len, h->msid);
|
|
|
|
/* header done */
|
|
b->pos = p;
|
|
|
|
if (h->mlen > cscf->max_message) {
|
|
ngx_log_error(NGX_LOG_INFO, c->log, NGX_ERROR,
|
|
"too big message: %uz", cscf->max_message);
|
|
ngx_rtmp_close_connection(c);
|
|
return;
|
|
}
|
|
}
|
|
|
|
size = b->last - b->pos;
|
|
fsize = h->mlen - st->len;
|
|
|
|
if (size < ngx_min(fsize, s->in_chunk_size))
|
|
continue;
|
|
|
|
/* buffer is ready */
|
|
|
|
if (fsize > s->in_chunk_size) {
|
|
/* collect fragmented chunks */
|
|
st->len += s->in_chunk_size;
|
|
b->last = b->pos + s->in_chunk_size;
|
|
old_pos = b->last;
|
|
old_size = size - s->in_chunk_size;
|
|
|
|
} else {
|
|
/* handle! */
|
|
head = st->in->next;
|
|
st->in->next = NULL;
|
|
b->last = b->pos + fsize;
|
|
old_pos = b->last;
|
|
old_size = size - fsize;
|
|
st->len = 0;
|
|
|
|
if (ngx_rtmp_receive_message(s, h, head) != NGX_OK) {
|
|
ngx_rtmp_close_connection(c);
|
|
return;
|
|
}
|
|
|
|
/* add used bufs to stream #0 */
|
|
st0 = &s->in_streams[0];
|
|
st->in->next = st0->in;
|
|
st0->in = head;
|
|
st->in = NULL;
|
|
}
|
|
|
|
s->in_csid = 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ngx_rtmp_send(ngx_event_t *wev)
|
|
{
|
|
ngx_connection_t *c;
|
|
ngx_rtmp_session_t *s;
|
|
ngx_rtmp_core_srv_conf_t *cscf;
|
|
ngx_chain_t *out, *l, *cl;
|
|
u_char *p;
|
|
off_t limit;
|
|
size_t n;
|
|
|
|
c = wev->data;
|
|
s = c->data;
|
|
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
|
|
|
|
if (c->destroyed) {
|
|
return;
|
|
}
|
|
|
|
if (wev->timedout) {
|
|
ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
|
|
"client timed out");
|
|
c->timedout = 1;
|
|
ngx_rtmp_close_connection(c);
|
|
return;
|
|
}
|
|
|
|
if (wev->timer_set) {
|
|
ngx_del_timer(wev);
|
|
}
|
|
|
|
while (s->out) {
|
|
p = s->out->buf->pos;
|
|
|
|
/* send_chain calls writev for output.
|
|
* It uses mixed allocation model for
|
|
* for iovecs passed to writev. Only 64
|
|
* structs fit into stack. When writing more
|
|
* memory is allocated from c->pool and
|
|
* **NEVER EVER** returned back.
|
|
* IOV_MAX=1024 on Linux.
|
|
*
|
|
* The only way to escape allocation is
|
|
* limiting the number of output data blocks
|
|
* being written at once with NGX_HEADERS
|
|
* (64 by default).
|
|
*
|
|
* FIXME: NGINX
|
|
* Unfortunately NGINX API does not allow
|
|
* us to specify max number of such blocks
|
|
* but only size limit. We're left with
|
|
* limiting by size which leads to extra
|
|
* loop here to find size of first 64
|
|
* blocks in output.
|
|
* */
|
|
|
|
limit = 0;
|
|
n = 0;
|
|
cl = s->out;
|
|
while (cl && n < 64) {
|
|
++n;
|
|
limit += cl->buf->last - cl->buf->pos;
|
|
cl = cl->next;
|
|
}
|
|
|
|
out = c->send_chain(c, s->out, limit);
|
|
|
|
if (out == NGX_CHAIN_ERROR) {
|
|
ngx_rtmp_close_connection(c);
|
|
return;
|
|
}
|
|
|
|
if (out == s->out && out->buf->pos == p) {
|
|
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
|
|
ngx_add_timer(c->write, cscf->timeout);
|
|
if (ngx_handle_write_event(c->write, 0) != NGX_OK) {
|
|
ngx_rtmp_close_connection(c);
|
|
}
|
|
return;
|
|
}
|
|
|
|
while (s->out) {
|
|
l = s->out;
|
|
|
|
if (l->buf->pos < l->buf->last) {
|
|
break;
|
|
}
|
|
|
|
s->out = s->out->next;
|
|
l->next = NULL;
|
|
|
|
l->next = s->out_free_chains;
|
|
s->out_free_chains = l;
|
|
|
|
ngx_rtmp_free_shared_buf(cscf, l->buf);
|
|
|
|
if (s->out == out) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
ngx_del_event(wev, NGX_WRITE_EVENT, 0);
|
|
}
|
|
|
|
|
|
void
|
|
ngx_rtmp_prepare_message(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
|
|
ngx_rtmp_header_t *lh, ngx_chain_t *out)
|
|
{
|
|
ngx_chain_t *l;
|
|
u_char *p, *pp;
|
|
ngx_int_t hsize, thsize, nbufs;
|
|
uint32_t mlen, timestamp, ext_timestamp;
|
|
static uint8_t hdrsize[] = { 12, 8, 4, 1 };
|
|
u_char th[7];
|
|
ngx_rtmp_core_srv_conf_t *cscf;
|
|
uint8_t fmt;
|
|
ngx_connection_t *c;
|
|
|
|
c = s->connection;
|
|
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
|
|
|
|
if (h->csid >= cscf->max_streams) {
|
|
ngx_log_error(NGX_LOG_INFO, c->log, NGX_ERROR,
|
|
"RTMP out chunk stream too big: %D >= %D",
|
|
h->csid, cscf->max_streams);
|
|
ngx_rtmp_close_connection(c);
|
|
return;
|
|
}
|
|
|
|
/* detect packet size */
|
|
mlen = 0;
|
|
nbufs = 0;
|
|
for(l = out; l; l = l->next) {
|
|
mlen += (l->buf->last - l->buf->pos);
|
|
++nbufs;
|
|
}
|
|
|
|
fmt = 0;
|
|
if (lh && lh->csid && h->msid == lh->msid) {
|
|
++fmt;
|
|
if (h->type == lh->type && mlen == lh->mlen) {
|
|
++fmt;
|
|
if (h->timestamp == lh->timestamp) {
|
|
++fmt;
|
|
}
|
|
}
|
|
timestamp = h->timestamp - lh->timestamp;
|
|
} else {
|
|
timestamp = h->timestamp;
|
|
}
|
|
|
|
if (lh) {
|
|
*lh = *h;
|
|
lh->mlen = mlen;
|
|
}
|
|
|
|
hsize = hdrsize[fmt];
|
|
|
|
ngx_log_debug8(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
|
|
"RTMP prep %s (%d) fmt=%d csid=%uD timestamp=%uD "
|
|
"mlen=%uD msid=%uD nbufs=%d",
|
|
ngx_rtmp_message_type(h->type), (int)h->type, (int)fmt,
|
|
h->csid, h->timestamp, mlen, h->msid, nbufs);
|
|
|
|
ext_timestamp = 0;
|
|
if (timestamp >= 0x00ffffff) {
|
|
ext_timestamp = timestamp;
|
|
timestamp = 0x00ffffff;
|
|
hsize += 4;
|
|
}
|
|
|
|
if (h->csid >= 64) {
|
|
++hsize;
|
|
if (h->csid >= 320) {
|
|
++hsize;
|
|
}
|
|
}
|
|
|
|
/* fill initial header */
|
|
out->buf->pos -= hsize;
|
|
p = out->buf->pos;
|
|
|
|
/* basic header */
|
|
*p = (fmt << 6);
|
|
if (h->csid >= 2 && h->csid <= 63) {
|
|
*p++ |= (((uint8_t)h->csid) & 0x3f);
|
|
} else if (h->csid >= 64 && h->csid < 320) {
|
|
++p;
|
|
*p++ = (uint8_t)(h->csid - 64);
|
|
} else {
|
|
*p++ |= 1;
|
|
*p++ = (uint8_t)(h->csid - 64);
|
|
*p++ = (uint8_t)((h->csid - 64) >> 8);
|
|
}
|
|
|
|
/* create fmt3 header for successive fragments */
|
|
thsize = p - out->buf->pos;
|
|
ngx_memcpy(th, out->buf->pos, thsize);
|
|
th[0] |= 0xc0;
|
|
|
|
/* message header */
|
|
if (fmt <= 2) {
|
|
pp = (u_char*)×tamp;
|
|
*p++ = pp[2];
|
|
*p++ = pp[1];
|
|
*p++ = pp[0];
|
|
if (fmt <= 1) {
|
|
pp = (u_char*)&mlen;
|
|
*p++ = pp[2];
|
|
*p++ = pp[1];
|
|
*p++ = pp[0];
|
|
*p++ = h->type;
|
|
if (fmt == 0) {
|
|
pp = (u_char*)&h->msid;
|
|
*p++ = pp[0];
|
|
*p++ = pp[1];
|
|
*p++ = pp[2];
|
|
*p++ = pp[3];
|
|
}
|
|
}
|
|
}
|
|
|
|
/* extended header */
|
|
if (ext_timestamp) {
|
|
pp = (u_char*)&ext_timestamp;
|
|
*p++ = pp[3];
|
|
*p++ = pp[2];
|
|
*p++ = pp[1];
|
|
*p++ = pp[0];
|
|
|
|
/* This CONTRADICTS the standard
|
|
* but that's the way flash client
|
|
* wants data to be encoded;
|
|
* ffmpeg complains */
|
|
if (cscf->play_time_fix) {
|
|
ngx_memcpy(&th[thsize], p - 4, 4);
|
|
thsize += 4;
|
|
}
|
|
}
|
|
|
|
/* append headers to successive fragments */
|
|
for(out = out->next; out; out = out->next) {
|
|
out->buf->pos -= thsize;
|
|
ngx_memcpy(out->buf->pos, th, thsize);
|
|
}
|
|
}
|
|
|
|
|
|
ngx_int_t
|
|
ngx_rtmp_send_message(ngx_rtmp_session_t *s, ngx_chain_t *out,
|
|
ngx_uint_t priority)
|
|
{
|
|
ngx_chain_t *l, **ll;
|
|
ngx_connection_t *c;
|
|
ngx_buf_t *b;
|
|
ngx_rtmp_core_srv_conf_t *cscf;
|
|
size_t nbytes, nbufs, qbytes, qbufs;
|
|
|
|
c = s->connection;
|
|
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
|
|
qbytes = 0;
|
|
qbufs = 0;
|
|
nbytes = 0;
|
|
nbufs = 0;
|
|
|
|
for(ll = &s->out; *ll; ll = &(*ll)->next) {
|
|
qbytes += (*ll)->buf->last - (*ll)->buf->pos;
|
|
++qbufs;
|
|
}
|
|
|
|
/* drop packet? */
|
|
if (qbytes > cscf->max_buf / (priority + 1)) {
|
|
ngx_log_debug3(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"drop message bytes=%uz, bufs=%uz priority=%ui",
|
|
qbytes, qbufs, priority);
|
|
return NGX_AGAIN;
|
|
}
|
|
|
|
/* append locally-linked chain of shared buffers */
|
|
for(l = out; l; l = l->next) {
|
|
|
|
if (s->out_free_chains) {
|
|
*ll = s->out_free_chains;
|
|
s->out_free_chains = (*ll)->next;
|
|
|
|
} else {
|
|
*ll = ngx_alloc_chain_link(c->pool);
|
|
if (*ll == NULL) {
|
|
break;
|
|
}
|
|
(*ll)->buf = ngx_calloc_buf(c->pool);
|
|
if ((*ll)->buf == NULL) {
|
|
ngx_free_chain(c->pool, (*ll));
|
|
break;
|
|
}
|
|
}
|
|
|
|
b = (*ll)->buf;
|
|
*b = *l->buf;
|
|
|
|
ngx_rtmp_acquire_shared_buf(b);
|
|
|
|
ll = &(*ll)->next;
|
|
|
|
nbytes += (b->last - b->pos);
|
|
++nbufs;
|
|
}
|
|
*ll = NULL;
|
|
|
|
ngx_log_debug7(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"RTMP send bytes=%uz+%uz, bufs=%uz+%uz, priority=%ui, "
|
|
"ready=%d, active=%d",
|
|
qbytes, nbytes, qbufs, nbufs, priority,
|
|
c->write->ready, c->write->active);
|
|
|
|
if (!c->write->active) {
|
|
ngx_rtmp_send(c->write);
|
|
}
|
|
|
|
return c->destroyed ? NGX_ERROR : NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_receive_message(ngx_rtmp_session_t *s,
|
|
ngx_rtmp_header_t *h, ngx_chain_t *in)
|
|
{
|
|
ngx_rtmp_core_main_conf_t *cmcf;
|
|
ngx_array_t *evhs;
|
|
size_t n;
|
|
ngx_rtmp_handler_pt *evh;
|
|
ngx_connection_t *c;
|
|
|
|
c = s->connection;
|
|
cmcf = ngx_rtmp_get_module_main_conf(s, ngx_rtmp_core_module);
|
|
|
|
#ifdef NGX_DEBUG
|
|
{
|
|
int nbufs;
|
|
ngx_chain_t *ch;
|
|
|
|
for(nbufs = 1, ch = in;
|
|
ch->next;
|
|
ch = ch->next, ++nbufs);
|
|
|
|
ngx_log_debug7(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"RTMP recv %s (%d) csid=%D timestamp=%D "
|
|
"mlen=%D msid=%D nbufs=%d",
|
|
ngx_rtmp_message_type(h->type), (int)h->type,
|
|
h->csid, h->timestamp, h->mlen, h->msid, nbufs);
|
|
}
|
|
#endif
|
|
|
|
if (h->type >= NGX_RTMP_MSG_MAX) {
|
|
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"unexpected RTMP message type: %d", (int)h->type);
|
|
return NGX_OK;
|
|
}
|
|
|
|
evhs = &cmcf->events[h->type];
|
|
evh = evhs->elts;
|
|
|
|
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"nhandlers: %d", evhs->nelts);
|
|
|
|
for(n = 0; n < evhs->nelts; ++n, ++evh) {
|
|
if (!evh) {
|
|
continue;
|
|
}
|
|
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"calling handler %d", n);
|
|
|
|
switch ((*evh)(s, h, in)) {
|
|
case NGX_ERROR:
|
|
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, c->log, 0,
|
|
"handler %d failed", n);
|
|
return NGX_ERROR;
|
|
case NGX_DONE:
|
|
return NGX_OK;
|
|
}
|
|
}
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
void
|
|
ngx_rtmp_close_connection(ngx_connection_t *c)
|
|
{
|
|
ngx_rtmp_session_t *s;
|
|
ngx_pool_t *pool;
|
|
ngx_rtmp_core_main_conf_t *cmcf;
|
|
ngx_rtmp_core_srv_conf_t *cscf;
|
|
ngx_rtmp_handler_pt *h;
|
|
ngx_array_t *dh;
|
|
size_t n;
|
|
|
|
if (c->destroyed) {
|
|
return;
|
|
}
|
|
|
|
s = c->data;
|
|
cmcf = ngx_rtmp_get_module_main_conf(s, ngx_rtmp_core_module);
|
|
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
|
|
|
|
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, c->log, 0, "close connection");
|
|
|
|
if (s) {
|
|
dh = &cmcf->events[NGX_RTMP_DISCONNECT];
|
|
h = dh->elts;
|
|
|
|
for(n = 0; n < dh->nelts; ++n, ++h) {
|
|
if (*h) {
|
|
(*h)(s, NULL, NULL);
|
|
}
|
|
}
|
|
|
|
if (s->in_pool) {
|
|
ngx_destroy_pool(s->in_pool);
|
|
}
|
|
}
|
|
|
|
/* release only buffers, links are local
|
|
* and will be released as part of pool */
|
|
for (; s->out; s->out = s->out->next) {
|
|
ngx_rtmp_free_shared_buf(cscf, s->out->buf);
|
|
}
|
|
|
|
c->destroyed = 1;
|
|
pool = c->pool;
|
|
ngx_close_connection(c);
|
|
ngx_destroy_pool(pool);
|
|
}
|
|
|
|
|
|
u_char *
|
|
ngx_rtmp_log_error(ngx_log_t *log, u_char *buf, size_t len)
|
|
{
|
|
u_char *p;
|
|
ngx_rtmp_session_t *s;
|
|
ngx_rtmp_log_ctx_t *ctx;
|
|
|
|
if (log->action) {
|
|
p = ngx_snprintf(buf, len, " while %s", log->action);
|
|
len -= p - buf;
|
|
buf = p;
|
|
}
|
|
|
|
ctx = log->data;
|
|
|
|
p = ngx_snprintf(buf, len, ", client: %V", ctx->client);
|
|
len -= p - buf;
|
|
buf = p;
|
|
|
|
s = ctx->session;
|
|
|
|
if (s == NULL) {
|
|
return p;
|
|
}
|
|
|
|
p = ngx_snprintf(buf, len, ", server: %V", s->addr_text);
|
|
len -= p - buf;
|
|
buf = p;
|
|
|
|
return p;
|
|
}
|