Benoît Locher / Mbed 2 deprecated mbedNetTest

Example program showing how to use the mbedNet library with UDP sockets. This demo broadcasts a message each second with a counter value incrementing at every call while the application loop displays the datagrams received on the same socket.

Dependencies:   mbed

main.cpp@1:552bcce1761d, 2011-06-18 (annotated)

Committer:
Benoit
Date:
Sat Jun 18 08:34:29 2011 +0000
Revision:
1:552bcce1761d
Parent:
0:1b4d6b9e92a9 
Added static ARP entry for global broadcast address (255.255.255.255)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Benoit 0:1b4d6b9e92a9 1 #include <mbed.h>
Benoit 0:1b4d6b9e92a9 2 #include <Sockets.h>
Benoit 0:1b4d6b9e92a9 3 #include <mbedNetIF.h>
Benoit 0:1b4d6b9e92a9 4 #include <ARP.h>
Benoit 0:1b4d6b9e92a9 5 #include <ICMPv4.h>
Benoit 0:1b4d6b9e92a9 6 #include <UDPv4.h>
Benoit 0:1b4d6b9e92a9 7 #include <Debug.h>
Benoit 0:1b4d6b9e92a9 8
Benoit 0:1b4d6b9e92a9 9
Benoit 1:552bcce1761d 10 #define NET_TIMER_PERIOD 1
Benoit 1:552bcce1761d 11 #define BUFFER_LEN 64
Benoit 0:1b4d6b9e92a9 12
Benoit 0:1b4d6b9e92a9 13
Benoit 1:552bcce1761d 14 Serial pc(USBTX, USBRX); // tx, rx
Benoit 1:552bcce1761d 15 Ticker netTicker, echoTicker;
Benoit 1:552bcce1761d 16 Ethernet_Addr_t myMAC = {0x00, 0x10, 0x33, 0x2e, 0x18, 0x7f};
Benoit 1:552bcce1761d 17 IPv4_Addr_t ip = {192, 168, 0, 2},
Benoit 1:552bcce1761d 18 netmask = {255, 255, 255, 0},
Benoit 1:552bcce1761d 19 gateway = {192, 168, 0, 1},
Benoit 1:552bcce1761d 20 broadcastNet = {192, 168, 0, 255},
Benoit 1:552bcce1761d 21 broadcastAll = {255, 255, 255, 255};
Benoit 1:552bcce1761d 22 NetIF_t *mbedNetIF;
Benoit 1:552bcce1761d 23 Socket_t udpSocket;
Benoit 1:552bcce1761d 24 Socket_AddrIn_t localAddress, senderAddress, broadcastAddress;
Benoit 0:1b4d6b9e92a9 25
Benoit 0:1b4d6b9e92a9 26
Benoit 0:1b4d6b9e92a9 27 void NetTicker(void)
Benoit 0:1b4d6b9e92a9 28 {
Benoit 1:552bcce1761d 29 NetIF_ProcessTimers(NET_TIMER_PERIOD);
Benoit 0:1b4d6b9e92a9 30 }
Benoit 0:1b4d6b9e92a9 31
Benoit 0:1b4d6b9e92a9 32
Benoit 0:1b4d6b9e92a9 33 void EchoTicker(void)
Benoit 0:1b4d6b9e92a9 34 {
Benoit 1:552bcce1761d 35 char buffer[BUFFER_LEN];
Benoit 1:552bcce1761d 36 static int32_t counter = 0;
Benoit 1:552bcce1761d 37
Benoit 1:552bcce1761d 38 sprintf(buffer, "counter = %d\n", counter++);
Benoit 1:552bcce1761d 39 Sockets_SendTo(udpSocket, (uint8_t *)buffer, strlen(buffer), 0, (Socket_Addr_t *)&broadcastAddress, broadcastAddress.len);
Benoit 1:552bcce1761d 40 }
Benoit 1:552bcce1761d 41
Benoit 1:552bcce1761d 42
Benoit 1:552bcce1761d 43 void DisplayHelp(void)
Benoit 1:552bcce1761d 44 {
Benoit 1:552bcce1761d 45 printf("\r\nCommands:\r\n");
Benoit 1:552bcce1761d 46 printf(" d: display ARP cache\r\n");
Benoit 1:552bcce1761d 47 printf(" f: flush ARP cache\r\n");
Benoit 1:552bcce1761d 48 printf(" g: send ARP request for gateway\r\n");
Benoit 1:552bcce1761d 49 printf(" h: display these short help lines\r\n");
Benoit 1:552bcce1761d 50 printf("\r\n");
Benoit 0:1b4d6b9e92a9 51 }
Benoit 0:1b4d6b9e92a9 52
Benoit 0:1b4d6b9e92a9 53
Benoit 0:1b4d6b9e92a9 54 int main()
Benoit 0:1b4d6b9e92a9 55 {
Benoit 1:552bcce1761d 56 int32_t byteCount, senderAddressLength;
Benoit 1:552bcce1761d 57 char buffer[BUFFER_LEN], c;
Benoit 1:552bcce1761d 58
Benoit 1:552bcce1761d 59 // serial output speed to 115200 baud
Benoit 1:552bcce1761d 60 pc.baud(115200);
Benoit 1:552bcce1761d 61 setbuf(stdout, NULL);
Benoit 0:1b4d6b9e92a9 62
Benoit 1:552bcce1761d 63 // Clears screen and display a welcome message
Benoit 1:552bcce1761d 64 printf("%cStarting!\r\n", 12);
Benoit 1:552bcce1761d 65
Benoit 1:552bcce1761d 66 // Set debug levels to have the NetIF networking layer display the interface status
Benoit 1:552bcce1761d 67 Debug_SetMasks(DEBUG_MODULE_NETIF, DEBUG_LEVEL_ALL & ~(DEBUG_LEVEL_VERBOSE0 | DEBUG_LEVEL_VERBOSE1 | DEBUG_LEVEL_VERBOSE2));
Benoit 1:552bcce1761d 68
Benoit 1:552bcce1761d 69 mbedNetIF = NetIF_RegisterInterface(&ip, &netmask, &gateway, &mbedNetIF_Driver, (void *)&myMAC); // Registers the ethernet drivers as a network interface
Benoit 0:1b4d6b9e92a9 70
Benoit 1:552bcce1761d 71 ethernet.RegisterProtocol(&arp); // We need ARP over ethernet to resolve IP addresses with MAC addresses
Benoit 1:552bcce1761d 72 ethernet.RegisterProtocol(&ipv4); // We need IPv4 (over ethernet) of course
Benoit 1:552bcce1761d 73 ipv4.RegisterProtocol(&icmpv4); // Then ICMPv4 over IPv4 to answer ping requests
Benoit 1:552bcce1761d 74 ipv4.RegisterProtocol(&udpv4); // Next let's register UDPv4 over IPv4
Benoit 1:552bcce1761d 75 udpv4.RegisterAPI(&sockets); // Finally let's register the Sockets API (it is available for UDP at the moment)
Benoit 1:552bcce1761d 76
Benoit 1:552bcce1761d 77 ARP_AddStaticEntry(mbedNetIF, broadcastNet, &ethernet_Addr_Broadcast); // We add a static entry to the local network broadcast address to the ARP cache
Benoit 1:552bcce1761d 78 ARP_AddStaticEntry(mbedNetIF, broadcastAll, &ethernet_Addr_Broadcast); // We add a static entry to the GLOBAL broadcast address to the ARP cache
Benoit 1:552bcce1761d 79
Benoit 1:552bcce1761d 80 netTicker.attach(&NetTicker, NET_TIMER_PERIOD); // A 1 second periodic timer to process network house keeping routines (like expiration in the ARP cache, timeouts for TCP in the future, ...)
Benoit 1:552bcce1761d 81
Benoit 1:552bcce1761d 82 NetIF_Up(mbedNetIF); // Finally we bring the network interface up
Benoit 1:552bcce1761d 83
Benoit 1:552bcce1761d 84 udpSocket = Sockets_Open(AF_INET, SOCK_DGRAM, 0); // Create an UDP socket
Benoit 0:1b4d6b9e92a9 85
Benoit 1:552bcce1761d 86 localAddress.family = AF_INET;
Benoit 1:552bcce1761d 87 localAddress.len = sizeof(Socket_AddrIn_t);
Benoit 1:552bcce1761d 88 localAddress.port = htons(12345);
Benoit 1:552bcce1761d 89 localAddress.address = ipv4_Addr_Any;
Benoit 1:552bcce1761d 90
Benoit 1:552bcce1761d 91 broadcastAddress.family = AF_INET;
Benoit 1:552bcce1761d 92 broadcastAddress.len = sizeof(Socket_AddrIn_t);
Benoit 1:552bcce1761d 93 broadcastAddress.port = htons(54321);
Benoit 1:552bcce1761d 94 broadcastAddress.address = broadcastNet;
Benoit 1:552bcce1761d 95
Benoit 1:552bcce1761d 96 Sockets_Bind(udpSocket, (Socket_Addr_t *)&localAddress, localAddress.len); // We bind the socket to port 12345 and any local IP address
Benoit 1:552bcce1761d 97
Benoit 1:552bcce1761d 98 echoTicker.attach(&EchoTicker, 2); // Every two seconds, broadcast an UDP message to port 54321
Benoit 1:552bcce1761d 99
Benoit 1:552bcce1761d 100 // Then do whatever you need for your application. here we simply check if we have received a datagram from the udpSocket and display its informations
Benoit 1:552bcce1761d 101 senderAddressLength = sizeof(Socket_AddrIn_t);
Benoit 0:1b4d6b9e92a9 102
Benoit 1:552bcce1761d 103 DisplayHelp();
Benoit 1:552bcce1761d 104
Benoit 1:552bcce1761d 105 printf(">");
Benoit 0:1b4d6b9e92a9 106
Benoit 1:552bcce1761d 107 while(true)
Benoit 1:552bcce1761d 108 {
Benoit 1:552bcce1761d 109 byteCount = Sockets_RecvFrom(udpSocket, (uint8_t *)buffer, BUFFER_LEN, 0, (Socket_Addr_t *)&senderAddress, &senderAddressLength);
Benoit 1:552bcce1761d 110 if (byteCount > 0)
Benoit 1:552bcce1761d 111 {
Benoit 1:552bcce1761d 112 buffer[byteCount] = '\0';
Benoit 1:552bcce1761d 113 printf("We have received '%s' (%d bytes) from %d.%d.%d.%d:%d\r\n",
Benoit 1:552bcce1761d 114 buffer,
Benoit 1:552bcce1761d 115 byteCount,
Benoit 1:552bcce1761d 116 senderAddress.address.IP0,
Benoit 1:552bcce1761d 117 senderAddress.address.IP1,
Benoit 1:552bcce1761d 118 senderAddress.address.IP2,
Benoit 1:552bcce1761d 119 senderAddress.address.IP3,
Benoit 1:552bcce1761d 120 ntohs(senderAddress.port)
Benoit 1:552bcce1761d 121 );
Benoit 1:552bcce1761d 122 }
Benoit 1:552bcce1761d 123
Benoit 1:552bcce1761d 124 if (pc.readable())
Benoit 1:552bcce1761d 125 {
Benoit 1:552bcce1761d 126 c = pc.getc();
Benoit 1:552bcce1761d 127 printf("%c", c);
Benoit 1:552bcce1761d 128 switch(c)
Benoit 1:552bcce1761d 129 {
Benoit 1:552bcce1761d 130 case 'd':
Benoit 1:552bcce1761d 131 ARP_DisplayCache();
Benoit 1:552bcce1761d 132 printf("\r\n>");
Benoit 1:552bcce1761d 133 break;
Benoit 0:1b4d6b9e92a9 134
Benoit 1:552bcce1761d 135 case 'f':
Benoit 1:552bcce1761d 136 ARP_FlushCache(False);
Benoit 1:552bcce1761d 137 printf("\r\n>");
Benoit 1:552bcce1761d 138 break;
Benoit 1:552bcce1761d 139
Benoit 1:552bcce1761d 140 case 'g':
Benoit 1:552bcce1761d 141 ARP_ResolveIPv4Address(mbedNetIF, gateway, NULL);
Benoit 1:552bcce1761d 142 printf("\r\n>");
Benoit 1:552bcce1761d 143 break;
Benoit 1:552bcce1761d 144
Benoit 1:552bcce1761d 145 case 'h':
Benoit 1:552bcce1761d 146 DisplayHelp();
Benoit 1:552bcce1761d 147 printf("\r\n>");
Benoit 1:552bcce1761d 148 break;
Benoit 1:552bcce1761d 149 }
Benoit 0:1b4d6b9e92a9 150 }
Benoit 0:1b4d6b9e92a9 151 }
Benoit 0:1b4d6b9e92a9 152 }