Adam Green / EthernetInterface

Deprecated fork of old network stack source from github. Please use official library instead: https://mbed.org/users/mbed_official/code/EthernetInterface/

Socket/UDPSocket.cpp@1:eadc868c2acf, 2013-10-26 (annotated)

Committer:
AdamGreen
Date:
Sat Oct 26 08:51:36 2013 +0000
Revision:
1:eadc868c2acf
Parent:
0:3b00827bb0b7 
Fix TCP checksum bug and stranded large TCP segments.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AdamGreen 0:3b00827bb0b7 1 /* Copyright (C) 2012 mbed.org, MIT License
AdamGreen 0:3b00827bb0b7 2 *
AdamGreen 0:3b00827bb0b7 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
AdamGreen 0:3b00827bb0b7 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
AdamGreen 0:3b00827bb0b7 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
AdamGreen 0:3b00827bb0b7 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
AdamGreen 0:3b00827bb0b7 7 * furnished to do so, subject to the following conditions:
AdamGreen 0:3b00827bb0b7 8 *
AdamGreen 0:3b00827bb0b7 9 * The above copyright notice and this permission notice shall be included in all copies or
AdamGreen 0:3b00827bb0b7 10 * substantial portions of the Software.
AdamGreen 0:3b00827bb0b7 11 *
AdamGreen 0:3b00827bb0b7 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
AdamGreen 0:3b00827bb0b7 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
AdamGreen 0:3b00827bb0b7 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
AdamGreen 0:3b00827bb0b7 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
AdamGreen 0:3b00827bb0b7 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
AdamGreen 0:3b00827bb0b7 17 */
AdamGreen 0:3b00827bb0b7 18
AdamGreen 0:3b00827bb0b7 19 #include "Socket/UDPSocket.h"
AdamGreen 0:3b00827bb0b7 20
AdamGreen 0:3b00827bb0b7 21 #include <cstring>
AdamGreen 0:3b00827bb0b7 22
AdamGreen 0:3b00827bb0b7 23 using std::memset;
AdamGreen 0:3b00827bb0b7 24
AdamGreen 0:3b00827bb0b7 25 UDPSocket::UDPSocket() {
AdamGreen 0:3b00827bb0b7 26 }
AdamGreen 0:3b00827bb0b7 27
AdamGreen 0:3b00827bb0b7 28 int UDPSocket::init(void) {
AdamGreen 0:3b00827bb0b7 29 return init_socket(SOCK_DGRAM);
AdamGreen 0:3b00827bb0b7 30 }
AdamGreen 0:3b00827bb0b7 31
AdamGreen 0:3b00827bb0b7 32 // Server initialization
AdamGreen 0:3b00827bb0b7 33 int UDPSocket::bind(int port) {
AdamGreen 0:3b00827bb0b7 34 if (init_socket(SOCK_DGRAM) < 0)
AdamGreen 0:3b00827bb0b7 35 return -1;
AdamGreen 0:3b00827bb0b7 36
AdamGreen 0:3b00827bb0b7 37 struct sockaddr_in localHost;
AdamGreen 0:3b00827bb0b7 38 std::memset(&localHost, 0, sizeof(localHost));
AdamGreen 0:3b00827bb0b7 39
AdamGreen 0:3b00827bb0b7 40 localHost.sin_family = AF_INET;
AdamGreen 0:3b00827bb0b7 41 localHost.sin_port = htons(port);
AdamGreen 0:3b00827bb0b7 42 localHost.sin_addr.s_addr = INADDR_ANY;
AdamGreen 0:3b00827bb0b7 43
AdamGreen 0:3b00827bb0b7 44 if (lwip_bind(_sock_fd, (const struct sockaddr *) &localHost, sizeof(localHost)) < 0) {
AdamGreen 0:3b00827bb0b7 45 close();
AdamGreen 0:3b00827bb0b7 46 return -1;
AdamGreen 0:3b00827bb0b7 47 }
AdamGreen 0:3b00827bb0b7 48
AdamGreen 0:3b00827bb0b7 49 return 0;
AdamGreen 0:3b00827bb0b7 50 }
AdamGreen 0:3b00827bb0b7 51
AdamGreen 0:3b00827bb0b7 52 int UDPSocket::join_multicast_group(const char* address) {
AdamGreen 0:3b00827bb0b7 53 struct ip_mreq mreq;
AdamGreen 0:3b00827bb0b7 54
AdamGreen 0:3b00827bb0b7 55 // Set up group address
AdamGreen 0:3b00827bb0b7 56 mreq.imr_multiaddr.s_addr = inet_addr(address);
AdamGreen 0:3b00827bb0b7 57 mreq.imr_interface.s_addr = htonl(INADDR_ANY);
AdamGreen 0:3b00827bb0b7 58
AdamGreen 0:3b00827bb0b7 59 return set_option(IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
AdamGreen 0:3b00827bb0b7 60 }
AdamGreen 0:3b00827bb0b7 61
AdamGreen 0:3b00827bb0b7 62 int UDPSocket::set_broadcasting(bool broadcast) {
AdamGreen 0:3b00827bb0b7 63 int option = (broadcast) ? (1) : (0);
AdamGreen 0:3b00827bb0b7 64 return set_option(SOL_SOCKET, SO_BROADCAST, &option, sizeof(option));
AdamGreen 0:3b00827bb0b7 65 }
AdamGreen 0:3b00827bb0b7 66
AdamGreen 0:3b00827bb0b7 67 // -1 if unsuccessful, else number of bytes written
AdamGreen 0:3b00827bb0b7 68 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length) {
AdamGreen 0:3b00827bb0b7 69 if (_sock_fd < 0)
AdamGreen 0:3b00827bb0b7 70 return -1;
AdamGreen 0:3b00827bb0b7 71
AdamGreen 0:3b00827bb0b7 72 if (!_blocking) {
AdamGreen 0:3b00827bb0b7 73 TimeInterval timeout(_timeout);
AdamGreen 0:3b00827bb0b7 74 if (wait_writable(timeout) != 0)
AdamGreen 0:3b00827bb0b7 75 return 0;
AdamGreen 0:3b00827bb0b7 76 }
AdamGreen 0:3b00827bb0b7 77
AdamGreen 0:3b00827bb0b7 78 return lwip_sendto(_sock_fd, packet, length, 0, (const struct sockaddr *) &remote._remoteHost, sizeof(remote._remoteHost));
AdamGreen 0:3b00827bb0b7 79 }
AdamGreen 0:3b00827bb0b7 80
AdamGreen 0:3b00827bb0b7 81 // -1 if unsuccessful, else number of bytes received
AdamGreen 0:3b00827bb0b7 82 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length) {
AdamGreen 0:3b00827bb0b7 83 if (_sock_fd < 0)
AdamGreen 0:3b00827bb0b7 84 return -1;
AdamGreen 0:3b00827bb0b7 85
AdamGreen 0:3b00827bb0b7 86 if (!_blocking) {
AdamGreen 0:3b00827bb0b7 87 TimeInterval timeout(_timeout);
AdamGreen 0:3b00827bb0b7 88 if (wait_readable(timeout) != 0)
AdamGreen 0:3b00827bb0b7 89 return 0;
AdamGreen 0:3b00827bb0b7 90 }
AdamGreen 0:3b00827bb0b7 91 remote.reset_address();
AdamGreen 0:3b00827bb0b7 92 socklen_t remoteHostLen = sizeof(remote._remoteHost);
AdamGreen 0:3b00827bb0b7 93 return lwip_recvfrom(_sock_fd, buffer, length, 0, (struct sockaddr*) &remote._remoteHost, &remoteHostLen);
AdamGreen 0:3b00827bb0b7 94 }