WIZnet / WIZnet_Library

This is WIZnet Ethernet Interface using Hardware TCP/IP chip, W5500, W5200 and W5100. One of them can be selected by enabling it in wiznet.h.

Dependents:   Embedded_web EmailButton EmailButton HTTPClient_Weather ... more

other drivers

for only W5500 / WIZ550io user, you could use

Import libraryW5500Interface

This is the Interface library for WIZnet W5500 chip which forked of EthernetInterfaceW5500, WIZnetInterface and WIZ550ioInterface. This library has simple name as "W5500Interface". and can be used for Wiz550io users also.

Last commit 28 Apr 2015 by W5500-Ethernet-Interface Makers

WIZnetInterface/Socket/UDPSocket.cpp@5:89edb39d8707, 2014-10-06 (annotated)

Committer:
Bongjun
Date:
Mon Oct 06 01:35:09 2014 +0000
Revision:
5:89edb39d8707
Parent:
0:b72d22e10709 
Perform Length check here to prevent buffer overrun fixed by Sean Newton

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jbkim 0:b72d22e10709 1 /* Copyright (C) 2012 mbed.org, MIT License
jbkim 0:b72d22e10709 2 *
jbkim 0:b72d22e10709 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
jbkim 0:b72d22e10709 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
jbkim 0:b72d22e10709 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
jbkim 0:b72d22e10709 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
jbkim 0:b72d22e10709 7 * furnished to do so, subject to the following conditions:
jbkim 0:b72d22e10709 8 *
jbkim 0:b72d22e10709 9 * The above copyright notice and this permission notice shall be included in all copies or
jbkim 0:b72d22e10709 10 * substantial portions of the Software.
jbkim 0:b72d22e10709 11 *
jbkim 0:b72d22e10709 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
jbkim 0:b72d22e10709 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
jbkim 0:b72d22e10709 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
jbkim 0:b72d22e10709 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
jbkim 0:b72d22e10709 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
jbkim 0:b72d22e10709 17 */
jbkim 0:b72d22e10709 18
jbkim 0:b72d22e10709 19 #include "UDPSocket.h"
jbkim 0:b72d22e10709 20
jbkim 0:b72d22e10709 21 static int udp_local_port;
jbkim 0:b72d22e10709 22
jbkim 0:b72d22e10709 23 UDPSocket::UDPSocket()
jbkim 0:b72d22e10709 24 {
jbkim 0:b72d22e10709 25 }
jbkim 0:b72d22e10709 26
jbkim 0:b72d22e10709 27 // After init function, bind() should be called.
jbkim 0:b72d22e10709 28 int UDPSocket::init(void)
jbkim 0:b72d22e10709 29 {
jbkim 0:b72d22e10709 30 if (_sock_fd < 0) {
jbkim 0:b72d22e10709 31 _sock_fd = eth->new_socket();
jbkim 0:b72d22e10709 32 }
Bongjun 5:89edb39d8707 33 if (eth->setProtocol(_sock_fd, UDP) == false) return -1;
jbkim 0:b72d22e10709 34 return 0;
jbkim 0:b72d22e10709 35 }
jbkim 0:b72d22e10709 36
jbkim 0:b72d22e10709 37 // Server initialization
jbkim 0:b72d22e10709 38 int UDPSocket::bind(int port)
jbkim 0:b72d22e10709 39 {
jbkim 0:b72d22e10709 40 if (_sock_fd < 0) {
jbkim 0:b72d22e10709 41 _sock_fd = eth->new_socket();
jbkim 0:b72d22e10709 42 if (_sock_fd < 0) {
jbkim 0:b72d22e10709 43 return -1;
jbkim 0:b72d22e10709 44 }
jbkim 0:b72d22e10709 45 }
jbkim 0:b72d22e10709 46 // set local port
jbkim 0:b72d22e10709 47 if (port != 0) {
jbkim 0:b72d22e10709 48 eth->sreg<uint16_t>(_sock_fd, Sn_PORT, port);
jbkim 0:b72d22e10709 49 } else {
jbkim 0:b72d22e10709 50 udp_local_port++;
jbkim 0:b72d22e10709 51 eth->sreg<uint16_t>(_sock_fd, Sn_PORT, udp_local_port);
jbkim 0:b72d22e10709 52 }
jbkim 0:b72d22e10709 53 // set udp protocol
jbkim 0:b72d22e10709 54 eth->setProtocol(_sock_fd, UDP);
jbkim 0:b72d22e10709 55 eth->scmd(_sock_fd, OPEN);
jbkim 0:b72d22e10709 56 return 0;
jbkim 0:b72d22e10709 57 }
jbkim 0:b72d22e10709 58
jbkim 0:b72d22e10709 59 // -1 if unsuccessful, else number of bytes written
jbkim 0:b72d22e10709 60 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length)
jbkim 0:b72d22e10709 61 {
jbkim 0:b72d22e10709 62 int size = eth->wait_writeable(_sock_fd, _blocking ? -1 : _timeout, length-1);
jbkim 0:b72d22e10709 63 if (size < 0) {
jbkim 0:b72d22e10709 64 return -1;
jbkim 0:b72d22e10709 65 }
jbkim 0:b72d22e10709 66 confEndpoint(remote);
jbkim 0:b72d22e10709 67 int ret = eth->send(_sock_fd, packet, length);
jbkim 0:b72d22e10709 68 return ret;
jbkim 0:b72d22e10709 69 }
jbkim 0:b72d22e10709 70
jbkim 0:b72d22e10709 71 // -1 if unsuccessful, else number of bytes received
jbkim 0:b72d22e10709 72 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length)
jbkim 0:b72d22e10709 73 {
jbkim 0:b72d22e10709 74 uint8_t info[8];
jbkim 0:b72d22e10709 75 int size = eth->wait_readable(_sock_fd, _blocking ? -1 : _timeout, sizeof(info));
jbkim 0:b72d22e10709 76 if (size < 0) {
jbkim 0:b72d22e10709 77 return -1;
jbkim 0:b72d22e10709 78 }
jbkim 0:b72d22e10709 79 eth->recv(_sock_fd, (char*)info, sizeof(info));
jbkim 0:b72d22e10709 80 readEndpoint(remote, info);
Bongjun 5:89edb39d8707 81 int udp_size = info[6]<<8|info[7];
jbkim 0:b72d22e10709 82 //TEST_ASSERT(udp_size <= (size-sizeof(info)));
jbkim 0:b72d22e10709 83 if (udp_size > (size-sizeof(info))) {
jbkim 0:b72d22e10709 84 return -1;
jbkim 0:b72d22e10709 85 }
Bongjun 5:89edb39d8707 86
Bongjun 5:89edb39d8707 87 /* Perform Length check here to prevent buffer overrun */
Bongjun 5:89edb39d8707 88 /* fixed by Sean Newton (https://developer.mbed.org/users/SeanNewton/) */
Bongjun 5:89edb39d8707 89 if (udp_size > length) {
Bongjun 5:89edb39d8707 90 //printf("udp_size: %d\n",udp_size);
Bongjun 5:89edb39d8707 91 return -1;
Bongjun 5:89edb39d8707 92 }
jbkim 0:b72d22e10709 93 return eth->recv(_sock_fd, buffer, udp_size);
jbkim 0:b72d22e10709 94 }
jbkim 0:b72d22e10709 95
jbkim 0:b72d22e10709 96 void UDPSocket::confEndpoint(Endpoint & ep)
jbkim 0:b72d22e10709 97 {
jbkim 0:b72d22e10709 98 char * host = ep.get_address();
jbkim 0:b72d22e10709 99 // set remote host
jbkim 0:b72d22e10709 100 eth->sreg_ip(_sock_fd, Sn_DIPR, host);
jbkim 0:b72d22e10709 101 // set remote port
jbkim 0:b72d22e10709 102 eth->sreg<uint16_t>(_sock_fd, Sn_DPORT, ep.get_port());
jbkim 0:b72d22e10709 103 }
jbkim 0:b72d22e10709 104
jbkim 0:b72d22e10709 105 void UDPSocket::readEndpoint(Endpoint & ep, uint8_t info[])
jbkim 0:b72d22e10709 106 {
jbkim 0:b72d22e10709 107 char addr[17];
jbkim 0:b72d22e10709 108 snprintf(addr, sizeof(addr), "%d.%d.%d.%d", info[0], info[1], info[2], info[3]);
jbkim 0:b72d22e10709 109 uint16_t port = info[4]<<8|info[5];
jbkim 0:b72d22e10709 110 ep.set_address(addr, port);
jbkim 0:b72d22e10709 111 }
jbkim 0:b72d22e10709 112