Wayne Jay / EthernetInterface

Onenet

Dependents:   K64F_eCompass_OneNET_JW

Socket/UDPSocket.cpp@0:b2805b6888dc, 2016-06-20 (annotated)

Committer:
robert_jw
Date:
Mon Jun 20 01:40:20 2016 +0000
Revision:
0:b2805b6888dc
ADS

Who changed what in which revision?

UserRevisionLine numberNew contents of line
robert_jw 0:b2805b6888dc 1 /* Copyright (C) 2012 mbed.org, MIT License
robert_jw 0:b2805b6888dc 2 *
robert_jw 0:b2805b6888dc 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
robert_jw 0:b2805b6888dc 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
robert_jw 0:b2805b6888dc 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
robert_jw 0:b2805b6888dc 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
robert_jw 0:b2805b6888dc 7 * furnished to do so, subject to the following conditions:
robert_jw 0:b2805b6888dc 8 *
robert_jw 0:b2805b6888dc 9 * The above copyright notice and this permission notice shall be included in all copies or
robert_jw 0:b2805b6888dc 10 * substantial portions of the Software.
robert_jw 0:b2805b6888dc 11 *
robert_jw 0:b2805b6888dc 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
robert_jw 0:b2805b6888dc 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
robert_jw 0:b2805b6888dc 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
robert_jw 0:b2805b6888dc 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
robert_jw 0:b2805b6888dc 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
robert_jw 0:b2805b6888dc 17 */
robert_jw 0:b2805b6888dc 18
robert_jw 0:b2805b6888dc 19 #include "Socket/UDPSocket.h"
robert_jw 0:b2805b6888dc 20
robert_jw 0:b2805b6888dc 21 #include <cstring>
robert_jw 0:b2805b6888dc 22
robert_jw 0:b2805b6888dc 23 using std::memset;
robert_jw 0:b2805b6888dc 24
robert_jw 0:b2805b6888dc 25 UDPSocket::UDPSocket() {
robert_jw 0:b2805b6888dc 26 }
robert_jw 0:b2805b6888dc 27
robert_jw 0:b2805b6888dc 28 int UDPSocket::init(void) {
robert_jw 0:b2805b6888dc 29 return init_socket(SOCK_DGRAM);
robert_jw 0:b2805b6888dc 30 }
robert_jw 0:b2805b6888dc 31
robert_jw 0:b2805b6888dc 32 // Server initialization
robert_jw 0:b2805b6888dc 33 int UDPSocket::bind(int port) {
robert_jw 0:b2805b6888dc 34 if (init_socket(SOCK_DGRAM) < 0)
robert_jw 0:b2805b6888dc 35 return -1;
robert_jw 0:b2805b6888dc 36
robert_jw 0:b2805b6888dc 37 struct sockaddr_in localHost;
robert_jw 0:b2805b6888dc 38 std::memset(&localHost, 0, sizeof(localHost));
robert_jw 0:b2805b6888dc 39
robert_jw 0:b2805b6888dc 40 localHost.sin_family = AF_INET;
robert_jw 0:b2805b6888dc 41 localHost.sin_port = htons(port);
robert_jw 0:b2805b6888dc 42 localHost.sin_addr.s_addr = INADDR_ANY;
robert_jw 0:b2805b6888dc 43
robert_jw 0:b2805b6888dc 44 if (lwip_bind(_sock_fd, (const struct sockaddr *) &localHost, sizeof(localHost)) < 0) {
robert_jw 0:b2805b6888dc 45 close();
robert_jw 0:b2805b6888dc 46 return -1;
robert_jw 0:b2805b6888dc 47 }
robert_jw 0:b2805b6888dc 48
robert_jw 0:b2805b6888dc 49 return 0;
robert_jw 0:b2805b6888dc 50 }
robert_jw 0:b2805b6888dc 51
robert_jw 0:b2805b6888dc 52 int UDPSocket::join_multicast_group(const char* address) {
robert_jw 0:b2805b6888dc 53 struct ip_mreq mreq;
robert_jw 0:b2805b6888dc 54
robert_jw 0:b2805b6888dc 55 // Set up group address
robert_jw 0:b2805b6888dc 56 mreq.imr_multiaddr.s_addr = inet_addr(address);
robert_jw 0:b2805b6888dc 57 mreq.imr_interface.s_addr = htonl(INADDR_ANY);
robert_jw 0:b2805b6888dc 58
robert_jw 0:b2805b6888dc 59 return set_option(IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
robert_jw 0:b2805b6888dc 60 }
robert_jw 0:b2805b6888dc 61
robert_jw 0:b2805b6888dc 62 int UDPSocket::set_broadcasting(bool broadcast) {
robert_jw 0:b2805b6888dc 63 int option = (broadcast) ? (1) : (0);
robert_jw 0:b2805b6888dc 64 return set_option(SOL_SOCKET, SO_BROADCAST, &option, sizeof(option));
robert_jw 0:b2805b6888dc 65 }
robert_jw 0:b2805b6888dc 66
robert_jw 0:b2805b6888dc 67 // -1 if unsuccessful, else number of bytes written
robert_jw 0:b2805b6888dc 68 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length) {
robert_jw 0:b2805b6888dc 69 if (_sock_fd < 0)
robert_jw 0:b2805b6888dc 70 return -1;
robert_jw 0:b2805b6888dc 71
robert_jw 0:b2805b6888dc 72 if (!_blocking) {
robert_jw 0:b2805b6888dc 73 TimeInterval timeout(_timeout);
robert_jw 0:b2805b6888dc 74 if (wait_writable(timeout) != 0)
robert_jw 0:b2805b6888dc 75 return 0;
robert_jw 0:b2805b6888dc 76 }
robert_jw 0:b2805b6888dc 77
robert_jw 0:b2805b6888dc 78 return lwip_sendto(_sock_fd, packet, length, 0, (const struct sockaddr *) &remote._remoteHost, sizeof(remote._remoteHost));
robert_jw 0:b2805b6888dc 79 }
robert_jw 0:b2805b6888dc 80
robert_jw 0:b2805b6888dc 81 // -1 if unsuccessful, else number of bytes received
robert_jw 0:b2805b6888dc 82 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length) {
robert_jw 0:b2805b6888dc 83 if (_sock_fd < 0)
robert_jw 0:b2805b6888dc 84 return -1;
robert_jw 0:b2805b6888dc 85
robert_jw 0:b2805b6888dc 86 if (!_blocking) {
robert_jw 0:b2805b6888dc 87 TimeInterval timeout(_timeout);
robert_jw 0:b2805b6888dc 88 if (wait_readable(timeout) != 0)
robert_jw 0:b2805b6888dc 89 return 0;
robert_jw 0:b2805b6888dc 90 }
robert_jw 0:b2805b6888dc 91 remote.reset_address();
robert_jw 0:b2805b6888dc 92 socklen_t remoteHostLen = sizeof(remote._remoteHost);
robert_jw 0:b2805b6888dc 93 return lwip_recvfrom(_sock_fd, buffer, length, 0, (struct sockaddr*) &remote._remoteHost, &remoteHostLen);
robert_jw 0:b2805b6888dc 94 }