SPICE建立Channel的详细步骤及消息传递流程

参考 http://www.cnblogs.com/D-Tec/archive/2013/04/19/3030129.html
建立Channel的详细步骤及消息传递流程如下：（s表示server代码，c表示client代码）

s: reds_init_net, 注册回调reds_accept 创建listen socket，增加监听watch_add(reds_accept),后续加入select监听

c: RedChannel::run-》RedChannelBase::connect() -》RedPeer::connect_unsecure发送连接请求，等待服务端accept

s: reds_accept
    -》spice_server_add_client，reds_handle_new_link
        -》async_read_handler，异步接收数据，需要客户端发送数据，填充link->link_header结束
c: RedChannelBase::link() -》link_mess.channel_type = _type，send 发送link请求，recive等待
s:            -》reds_handle_read_header_done，
                -》async_read_handler，填充link->link_mess
                    -》reds_handle_read_link_done
                        —》async_read_handler，填充link->auth_mechanism
                            ->reds_handle_auth_mechanism
                                ->reds_get_spice_ticket
                                   —》async_read_handler，填充link->tiTicketing.encrypted_ticket.encrypted_data
                                       —》 reds_handle_ticket
                                           ->reds_handle_link
                                             ->if (link->link_mess->channel_type == SPICE_CHANNEL_MAIN) { reds_handle_main_link(link); }
   async_read_handler-》reds_stream_read堵塞，等待客户端发送消息

reds_handle_main_link流程
    -》reds_send_link_result(link, SPICE_LINK_ERR_OK);

c->s: SPICE_CHANNEL_MAIN s: reds_handle_main_link，此过程的详细步骤如上

s->c: SPICE_MSG_MAIN_INIT, c: handle_init

c->s: SPICE_MSGC_MAIN_ATTACH_CHANNELS s: reds_send_channels

s->c: SPICE_MSG_MAIN_CHANNELS_LIST c: handle_channels