TCPSocketServer.cpp

00001 /* Copyright (C) 2012 mbed.org, MIT License
00002  *
00003  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
00004  * and associated documentation files (the "Software"), to deal in the Software without restriction,
00005  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
00006  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
00007  * furnished to do so, subject to the following conditions:
00008  *
00009  * The above copyright notice and this permission notice shall be included in all copies or
00010  * substantial portions of the Software.
00011  *
00012  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
00013  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00014  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00015  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00016  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00017  */
00018 
00019 #include "TCPSocketServer.h"
00020 
00021 TCPSocketServer::TCPSocketServer() {}
00022 
00023 // Server initialization
00024 int TCPSocketServer::bind(int port) {
00025     if (_sock_fd < 0) {
00026         _sock_fd = eth->new_socket();
00027         if (_sock_fd < 0) {
00028             return -1;
00029         }
00030     }
00031     // set TCP protocol
00032     eth->setProtocol(_sock_fd, TCP);
00033     // set local port
00034     eth->sreg<uint16_t>(_sock_fd, Sn_PORT, port);
00035     // connect the network
00036     eth->scmd(_sock_fd, OPEN);
00037     return 0;
00038 }
00039 
00040 int TCPSocketServer::listen(int backlog) {
00041     if (_sock_fd < 0) {
00042         return -1;
00043     }
00044     if (backlog != 1) {
00045         return -1;
00046     }
00047     eth->scmd(_sock_fd, LISTEN);
00048     return 0;
00049 }
00050 
00051 
00052 int TCPSocketServer::accept(TCPSocketConnection& connection) {
00053     if (_sock_fd < 0) {
00054         return -1;
00055     }
00056     Timer t;
00057     t.reset();
00058     t.start();
00059     while(1) {
00060         if (t.read_ms() > _timeout && _blocking == false) {
00061             return -1;
00062         }
00063         if (eth->sreg<uint8_t>(_sock_fd, Sn_SR) == SOCK_ESTABLISHED) {
00064             break;
00065         }
00066     }
00067     uint32_t ip = eth->sreg<uint32_t>(_sock_fd, Sn_DIPR);
00068     char host[16];
00069     snprintf(host, sizeof(host), "%d.%d.%d.%d", (ip>>24)&0xff, (ip>>16)&0xff, (ip>>8)&0xff, ip&0xff);
00070     uint16_t port = eth->sreg<uint16_t>(_sock_fd, Sn_DPORT);
00071     connection._sock_fd = _sock_fd;
00072     connection.set_address(host, port);
00073     return 0;
00074 }
00075