tool/mbed/mbed-sdk/libraries/net/lwip/Socket/Endpoint.cpp

   1 /* Copyright (C) 2012 mbed.org, MIT License
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
   4  * and associated documentation files (the "Software"), to deal in the Software without restriction,
   5  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
   6  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
   7  * furnished to do so, subject to the following conditions:
   8  *
   9  * The above copyright notice and this permission notice shall be included in all copies or
  10  * substantial portions of the Software.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
  13  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  14  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  15  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  16  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  17  */
  18 #include "Socket/Socket.h"
  19 #include "Socket/Endpoint.h"
  20 #include <cstring>
  21 #include <cstdio>
  22
  23 Endpoint::Endpoint()  {
  24     reset_address();
  25 }
  26 Endpoint::~Endpoint() {}
  27
  28 void Endpoint::reset_address(void) {
  29     std::memset(&_remoteHost, 0, sizeof(struct sockaddr_in));
  30     _ipAddress[0] = '\0';
  31 }
  32
  33 #include "stdio.h"
  34
  35 int Endpoint::set_address(const char* host, const int port) {
  36     reset_address();
  37
  38     // IP Address
  39     char address[5];
  40     char *p_address = address;
  41
  42     // Dot-decimal notation
  43     int result = std::sscanf(host, "%3u.%3u.%3u.%3u",
  44         (unsigned int*)&address[0], (unsigned int*)&address[1],
  45         (unsigned int*)&address[2], (unsigned int*)&address[3]);
  46
  47     if (result != 4) {
  48         // Resolve address with DNS
  49         struct hostent *host_address = lwip_gethostbyname(host);
  50         if (host_address == NULL)
  51             return -1; //Could not resolve address
  52         p_address = (char*)host_address->h_addr_list[0];
  53     }
  54     std::memcpy((char*)&_remoteHost.sin_addr.s_addr, p_address, 4);
  55
  56     // Address family
  57     _remoteHost.sin_family = AF_INET;
  58
  59     // Set port
  60     _remoteHost.sin_port = htons(port);
  61
  62     return 0;
  63 }
  64
  65 char* Endpoint::get_address() {
  66     if ((_ipAddress[0] == '\0') && (_remoteHost.sin_addr.s_addr != 0))
  67             inet_ntoa_r(_remoteHost.sin_addr, _ipAddress, sizeof(_ipAddress));
  68     return _ipAddress;
  69 }
  70
  71 int   Endpoint::get_port() {
  72     return ntohs(_remoteHost.sin_port);
  73 }