Endpoint.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 #include "Socket/Socket.h"
00019 #include "Socket/Endpoint.h"
00020 #include <cstring>
00021 #include <cstdio>
00022 
00023 
00024 Endpoint::Endpoint()  {
00025     reset_address();
00026 }
00027 Endpoint::~Endpoint() {}
00028 
00029 void Endpoint::reset_address(void) {
00030     std::memset(&_remoteHost, 0, sizeof(struct sockaddr_in));
00031     _ipAddress[0] = '\0';
00032 }
00033 
00034 #include "stdio.h"
00035 
00036 int Endpoint::set_address(const char* host, const int port) {
00037     reset_address();
00038     
00039     // IP Address
00040     char address[5];
00041     char *p_address = address;
00042     
00043     // Dot-decimal notation
00044     int result = std::sscanf(host, "%3u.%3u.%3u.%3u",
00045         (unsigned int*)&address[0], (unsigned int*)&address[1],
00046         (unsigned int*)&address[2], (unsigned int*)&address[3]);
00047     
00048     if (result != 4) {
00049         #if LWIP_DNS
00050         // Resolve address with DNS
00051         struct hostent *host_address = lwip_gethostbyname(host);
00052         if (host_address == NULL)
00053             return -1; //Could not resolve address
00054         p_address = (char*)host_address->h_addr_list[0];
00055         #endif
00056     }
00057     std::memcpy((char*)&_remoteHost.sin_addr.s_addr, p_address, 4);
00058     
00059     // Address family
00060     _remoteHost.sin_family = AF_INET;
00061     
00062     // Set port
00063     _remoteHost.sin_port = htons(port);
00064     
00065     return 0;
00066 }
00067 
00068 char* Endpoint::get_address() {
00069     if ((_ipAddress[0] == '\0') && (_remoteHost.sin_addr.s_addr != 0))
00070             inet_ntoa_r(_remoteHost.sin_addr, _ipAddress, sizeof(_ipAddress));
00071     return _ipAddress;
00072 }
00073 
00074 int   Endpoint::get_port() {
00075     return ntohs(_remoteHost.sin_port);
00076 }