justin kim / WIZnetInterface

petfeeder st ver

Fork of WIZnetInterface by WIZnet

Socket/UDPSocket.cpp@30:a5c77f065ab7, 2017-06-09 (annotated)

Committer:
justinkim
Date:
Fri Jun 09 04:44:10 2017 +0000
Revision:
30:a5c77f065ab7
Parent:
0:6f28332c466f 
petfeeder st ver

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Soohwan Kim 0:6f28332c466f 1 /* Copyright (C) 2012 mbed.org, MIT License
Soohwan Kim 0:6f28332c466f 2 *
Soohwan Kim 0:6f28332c466f 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
Soohwan Kim 0:6f28332c466f 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
Soohwan Kim 0:6f28332c466f 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
Soohwan Kim 0:6f28332c466f 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
Soohwan Kim 0:6f28332c466f 7 * furnished to do so, subject to the following conditions:
Soohwan Kim 0:6f28332c466f 8 *
Soohwan Kim 0:6f28332c466f 9 * The above copyright notice and this permission notice shall be included in all copies or
Soohwan Kim 0:6f28332c466f 10 * substantial portions of the Software.
Soohwan Kim 0:6f28332c466f 11 *
Soohwan Kim 0:6f28332c466f 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
Soohwan Kim 0:6f28332c466f 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
Soohwan Kim 0:6f28332c466f 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
Soohwan Kim 0:6f28332c466f 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Soohwan Kim 0:6f28332c466f 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Soohwan Kim 0:6f28332c466f 17 */
Soohwan Kim 0:6f28332c466f 18
Soohwan Kim 0:6f28332c466f 19 #include "UDPSocket.h"
Soohwan Kim 0:6f28332c466f 20
Soohwan Kim 0:6f28332c466f 21 static int udp_local_port;
Soohwan Kim 0:6f28332c466f 22
Soohwan Kim 0:6f28332c466f 23 UDPSocket::UDPSocket()
Soohwan Kim 0:6f28332c466f 24 {
Soohwan Kim 0:6f28332c466f 25 }
Soohwan Kim 0:6f28332c466f 26 // After init function, bind() should be called.
Soohwan Kim 0:6f28332c466f 27 int UDPSocket::init(void)
Soohwan Kim 0:6f28332c466f 28 {
Soohwan Kim 0:6f28332c466f 29 if (_sock_fd < 0) {
Soohwan Kim 0:6f28332c466f 30 _sock_fd = eth->new_socket();
Soohwan Kim 0:6f28332c466f 31 }
Soohwan Kim 0:6f28332c466f 32 if (eth->setProtocol(_sock_fd, WIZnet_Chip::UDP) == false) return -1;
Soohwan Kim 0:6f28332c466f 33 return 0;
Soohwan Kim 0:6f28332c466f 34 }
Soohwan Kim 0:6f28332c466f 35
Soohwan Kim 0:6f28332c466f 36 // Server initialization
Soohwan Kim 0:6f28332c466f 37 int UDPSocket::bind(int port)
Soohwan Kim 0:6f28332c466f 38 {
Soohwan Kim 0:6f28332c466f 39 if (_sock_fd < 0) {
Soohwan Kim 0:6f28332c466f 40 _sock_fd = eth->new_socket();
Soohwan Kim 0:6f28332c466f 41 if (_sock_fd < 0) {
Soohwan Kim 0:6f28332c466f 42 return -1;
Soohwan Kim 0:6f28332c466f 43 }
Soohwan Kim 0:6f28332c466f 44 }
Soohwan Kim 0:6f28332c466f 45 // set local port
Soohwan Kim 0:6f28332c466f 46 if (port != 0) {
Soohwan Kim 0:6f28332c466f 47 eth->sreg<uint16_t>(_sock_fd, Sn_PORT, port);
Soohwan Kim 0:6f28332c466f 48 } else {
Soohwan Kim 0:6f28332c466f 49 udp_local_port++;
Soohwan Kim 0:6f28332c466f 50 eth->sreg<uint16_t>(_sock_fd, Sn_PORT, udp_local_port);
Soohwan Kim 0:6f28332c466f 51 }
Soohwan Kim 0:6f28332c466f 52 // set udp protocol
Soohwan Kim 0:6f28332c466f 53 eth->setProtocol(_sock_fd, WIZnet_Chip::UDP);
Soohwan Kim 0:6f28332c466f 54 eth->scmd(_sock_fd, WIZnet_Chip::OPEN);
Soohwan Kim 0:6f28332c466f 55 return 0;
Soohwan Kim 0:6f28332c466f 56 }
Soohwan Kim 0:6f28332c466f 57
Soohwan Kim 0:6f28332c466f 58 // -1 if unsuccessful, else number of bytes written
Soohwan Kim 0:6f28332c466f 59 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length)
Soohwan Kim 0:6f28332c466f 60 {
Soohwan Kim 0:6f28332c466f 61 int size = eth->wait_writeable(_sock_fd, _blocking ? -1 : _timeout, length-1);
Soohwan Kim 0:6f28332c466f 62 if (size < 0) {
Soohwan Kim 0:6f28332c466f 63 return -1;
Soohwan Kim 0:6f28332c466f 64 }
Soohwan Kim 0:6f28332c466f 65 confEndpoint(remote);
Soohwan Kim 0:6f28332c466f 66 int ret = eth->send(_sock_fd, packet, length);
Soohwan Kim 0:6f28332c466f 67 return ret;
Soohwan Kim 0:6f28332c466f 68 }
Soohwan Kim 0:6f28332c466f 69
Soohwan Kim 0:6f28332c466f 70 // -1 if unsuccessful, else number of bytes received
Soohwan Kim 0:6f28332c466f 71 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length)
Soohwan Kim 0:6f28332c466f 72 {
Soohwan Kim 0:6f28332c466f 73 uint8_t info[8];
Soohwan Kim 0:6f28332c466f 74 int size = eth->wait_readable(_sock_fd, _blocking ? -1 : _timeout, sizeof(info));
Soohwan Kim 0:6f28332c466f 75 if (size < 0) {
Soohwan Kim 0:6f28332c466f 76 return -1;
Soohwan Kim 0:6f28332c466f 77 }
Soohwan Kim 0:6f28332c466f 78 eth->recv(_sock_fd, (char*)info, sizeof(info));
Soohwan Kim 0:6f28332c466f 79 readEndpoint(remote, info);
Soohwan Kim 0:6f28332c466f 80 int udp_size = info[6]<<8|info[7];
Soohwan Kim 0:6f28332c466f 81 //TEST_ASSERT(udp_size <= (size-sizeof(info)));
Soohwan Kim 0:6f28332c466f 82 if (udp_size > (size-sizeof(info))) {
Soohwan Kim 0:6f28332c466f 83 return -1;
Soohwan Kim 0:6f28332c466f 84 }
Soohwan Kim 0:6f28332c466f 85
Soohwan Kim 0:6f28332c466f 86 /* Perform Length check here to prevent buffer overrun */
Soohwan Kim 0:6f28332c466f 87 /* fixed by Sean Newton (https://developer.mbed.org/users/SeanNewton/) */
Soohwan Kim 0:6f28332c466f 88 if (udp_size > length) {
Soohwan Kim 0:6f28332c466f 89 //printf("udp_size: %d\n",udp_size);
Soohwan Kim 0:6f28332c466f 90 return -1;
Soohwan Kim 0:6f28332c466f 91 }
Soohwan Kim 0:6f28332c466f 92 return eth->recv(_sock_fd, buffer, udp_size);
Soohwan Kim 0:6f28332c466f 93 }
Soohwan Kim 0:6f28332c466f 94
Soohwan Kim 0:6f28332c466f 95 void UDPSocket::confEndpoint(Endpoint & ep)
Soohwan Kim 0:6f28332c466f 96 {
Soohwan Kim 0:6f28332c466f 97 char * host = ep.get_address();
Soohwan Kim 0:6f28332c466f 98 // set remote host
Soohwan Kim 0:6f28332c466f 99 eth->sreg_ip(_sock_fd, Sn_DIPR, host);
Soohwan Kim 0:6f28332c466f 100 // set remote port
Soohwan Kim 0:6f28332c466f 101 eth->sreg<uint16_t>(_sock_fd, Sn_DPORT, ep.get_port());
Soohwan Kim 0:6f28332c466f 102 }
Soohwan Kim 0:6f28332c466f 103
Soohwan Kim 0:6f28332c466f 104 void UDPSocket::readEndpoint(Endpoint & ep, uint8_t info[])
Soohwan Kim 0:6f28332c466f 105 {
Soohwan Kim 0:6f28332c466f 106 char addr[17];
Soohwan Kim 0:6f28332c466f 107 snprintf(addr, sizeof(addr), "%d.%d.%d.%d", info[0], info[1], info[2], info[3]);
Soohwan Kim 0:6f28332c466f 108 uint16_t port = info[4]<<8|info[5];
Soohwan Kim 0:6f28332c466f 109 ep.set_address(addr, port);
Soohwan Kim 0:6f28332c466f 110 }
Soohwan Kim 0:6f28332c466f 111