A stack which works with or without an Mbed os library. Provides IPv4 or IPv6 with a full 1500 byte buffer.

Dependents:   oldheating gps motorhome heating

Committer:
andrewboyson
Date:
Tue May 09 15:39:03 2017 +0000
Revision:
15:6ca6778168b1
Parent:
14:e75a59c1123d
Child:
22:914b970356f0
Tidied up dns debug output

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 10:f0854784e960 1 #include "mbed.h"
andrewboyson 10:f0854784e960 2 #include "log.h"
andrewboyson 10:f0854784e960 3 #include "net.h"
andrewboyson 10:f0854784e960 4 #include "udp.h"
andrewboyson 10:f0854784e960 5 #include "ntp.h"
andrewboyson 10:f0854784e960 6 #include "dhcp.h"
andrewboyson 10:f0854784e960 7 #include "dns.h"
andrewboyson 15:6ca6778168b1 8 #include "eth.h"
andrewboyson 10:f0854784e960 9 #include "ip4.h"
andrewboyson 10:f0854784e960 10 #include "ip6.h"
andrewboyson 10:f0854784e960 11 #include "slaac.h"
andrewboyson 10:f0854784e960 12 #include "ndp.h"
andrewboyson 13:9cd54f7db57a 13 #include "io.h"
andrewboyson 10:f0854784e960 14
andrewboyson 15:6ca6778168b1 15 #define UNKNOWN true
andrewboyson 10:f0854784e960 16
andrewboyson 10:f0854784e960 17 #define HEADER_SIZE 8
andrewboyson 10:f0854784e960 18 __packed struct header
andrewboyson 10:f0854784e960 19 {
andrewboyson 10:f0854784e960 20 uint16_t srcPort;
andrewboyson 10:f0854784e960 21 uint16_t dstPort;
andrewboyson 10:f0854784e960 22 uint16_t totalLength;
andrewboyson 10:f0854784e960 23 uint16_t checksum;
andrewboyson 10:f0854784e960 24 };
andrewboyson 14:e75a59c1123d 25 uint16_t UdpSrcPort;
andrewboyson 14:e75a59c1123d 26 uint16_t UdpDstPort;
andrewboyson 10:f0854784e960 27 static uint16_t checksum;
andrewboyson 10:f0854784e960 28 static uint16_t totalLength;
andrewboyson 10:f0854784e960 29
andrewboyson 10:f0854784e960 30 static int handlePort(int* pDataLength, void* pData)
andrewboyson 10:f0854784e960 31 {
andrewboyson 14:e75a59c1123d 32 switch (UdpDstPort)
andrewboyson 10:f0854784e960 33 {
andrewboyson 10:f0854784e960 34 //Handle these
andrewboyson 13:9cd54f7db57a 35 case DHCP_CLIENT_PORT: return DhcpHandleResponse ( pDataLength, pData); // 68
andrewboyson 14:e75a59c1123d 36 case NTP_PORT: return NtpHandleRequest ( pDataLength, pData); // 123
andrewboyson 14:e75a59c1123d 37 case DNS_UNICAST_CLIENT_PORT: return DnsHandlePacketReceived(DNS_PROTOCOL_UDNS, pDataLength, pData); //53053
andrewboyson 14:e75a59c1123d 38 case DNS_MDNS_PORT: return DnsHandlePacketReceived(DNS_PROTOCOL_MDNS, pDataLength, pData); // 5353
andrewboyson 15:6ca6778168b1 39 case DNS_LLMNR_CLIENT_PORT: return DnsHandlePacketReceived(DNS_PROTOCOL_LLMNR, pDataLength, pData); //53055
andrewboyson 15:6ca6778168b1 40 case DNS_LLMNR_SERVER_PORT: return DnsHandlePacketReceived(DNS_PROTOCOL_LLMNR, pDataLength, pData); // 5355
andrewboyson 10:f0854784e960 41
andrewboyson 10:f0854784e960 42 //Quietly drop these
andrewboyson 10:f0854784e960 43 case DHCP_SERVER_PORT: //67
andrewboyson 15:6ca6778168b1 44 case 137: //NETBIOS name service
andrewboyson 15:6ca6778168b1 45 case 138: //NETBIOS datagram service
andrewboyson 15:6ca6778168b1 46 case 139: //NETBIOS session service
andrewboyson 10:f0854784e960 47 case 1900: //SSDP Simple Service Discovery Protocol (uPnP)
andrewboyson 10:f0854784e960 48 case 3076: //Call of Duty - Xbox
andrewboyson 15:6ca6778168b1 49 case 9956: //Alljoyn part af Allseen IoT services
andrewboyson 10:f0854784e960 50 case 9997: //VLC
andrewboyson 10:f0854784e960 51 case 9998: //VLC
andrewboyson 10:f0854784e960 52 case 9999: //VLC
andrewboyson 10:f0854784e960 53 case 17500: //Dropbox LAN sync
andrewboyson 10:f0854784e960 54 return DO_NOTHING;
andrewboyson 10:f0854784e960 55
andrewboyson 10:f0854784e960 56 //Report anything else
andrewboyson 10:f0854784e960 57 default:
andrewboyson 14:e75a59c1123d 58 if (UNKNOWN) LogTimeF("UDP unknown port %d\r\n", UdpDstPort);
andrewboyson 10:f0854784e960 59 return DO_NOTHING;
andrewboyson 10:f0854784e960 60 }
andrewboyson 10:f0854784e960 61 }
andrewboyson 10:f0854784e960 62 int UdpHandleReceivedPacket(int* pSize, void* pPacket)
andrewboyson 10:f0854784e960 63 {
andrewboyson 10:f0854784e960 64 void* pData = (char*)pPacket + HEADER_SIZE;
andrewboyson 10:f0854784e960 65 int dataLength = *pSize - HEADER_SIZE;
andrewboyson 10:f0854784e960 66
andrewboyson 10:f0854784e960 67 int action = handlePort(&dataLength, pData);
andrewboyson 10:f0854784e960 68
andrewboyson 10:f0854784e960 69 *pSize = dataLength + HEADER_SIZE;
andrewboyson 10:f0854784e960 70
andrewboyson 14:e75a59c1123d 71 uint16_t tmpPort = UdpDstPort;
andrewboyson 14:e75a59c1123d 72 UdpDstPort = UdpSrcPort;
andrewboyson 14:e75a59c1123d 73 UdpSrcPort = tmpPort;
andrewboyson 10:f0854784e960 74
andrewboyson 10:f0854784e960 75 return action;
andrewboyson 10:f0854784e960 76 }
andrewboyson 10:f0854784e960 77 static int pollForPacketToSend(int type, int* pDataLength, void* pData)
andrewboyson 10:f0854784e960 78 {
andrewboyson 10:f0854784e960 79 int action = 0;
andrewboyson 10:f0854784e960 80
andrewboyson 10:f0854784e960 81 if (!action && type == IPV4) //DHCP only works under IPv4
andrewboyson 10:f0854784e960 82 {
andrewboyson 10:f0854784e960 83 action = DhcpPollForRequestToSend(pData, pDataLength);
andrewboyson 10:f0854784e960 84 if (action)
andrewboyson 10:f0854784e960 85 {
andrewboyson 14:e75a59c1123d 86 UdpSrcPort = DHCP_CLIENT_PORT;
andrewboyson 14:e75a59c1123d 87 UdpDstPort = DHCP_SERVER_PORT;
andrewboyson 10:f0854784e960 88 }
andrewboyson 10:f0854784e960 89 }
andrewboyson 10:f0854784e960 90
andrewboyson 10:f0854784e960 91 if (!action) //DNS is agnostic
andrewboyson 10:f0854784e960 92 {
andrewboyson 13:9cd54f7db57a 93 action = DnsPollForPacketToSend(pData, pDataLength);
andrewboyson 10:f0854784e960 94 if (action)
andrewboyson 10:f0854784e960 95 {
andrewboyson 10:f0854784e960 96 switch (action)
andrewboyson 10:f0854784e960 97 {
andrewboyson 14:e75a59c1123d 98 case UNICAST_DNS: UdpSrcPort = DNS_UNICAST_CLIENT_PORT; UdpDstPort = DNS_UNICAST_SERVER_PORT; break; //53053, 53
andrewboyson 14:e75a59c1123d 99 case MULTICAST_MDNS: UdpSrcPort = DNS_MDNS_PORT; UdpDstPort = DNS_MDNS_PORT; break; // 5353, 5353
andrewboyson 14:e75a59c1123d 100 case MULTICAST_LLMNR: UdpSrcPort = DNS_LLMNR_CLIENT_PORT; UdpDstPort = DNS_LLMNR_SERVER_PORT; break; //53055, 5355
andrewboyson 10:f0854784e960 101
andrewboyson 10:f0854784e960 102 //Report anything else
andrewboyson 10:f0854784e960 103 default:
andrewboyson 10:f0854784e960 104 LogTimeF("DNS unknown action %d\r\n", action);
andrewboyson 10:f0854784e960 105 return DO_NOTHING;
andrewboyson 10:f0854784e960 106 }
andrewboyson 10:f0854784e960 107 }
andrewboyson 10:f0854784e960 108 }
andrewboyson 10:f0854784e960 109 return action;
andrewboyson 10:f0854784e960 110 }
andrewboyson 10:f0854784e960 111 int UdpPollForPacketToSend(int type, int* pSize, void* pPacket)
andrewboyson 10:f0854784e960 112 {
andrewboyson 10:f0854784e960 113 void* pData = (char*)pPacket + HEADER_SIZE;
andrewboyson 10:f0854784e960 114 int dataLength = *pSize - HEADER_SIZE;
andrewboyson 10:f0854784e960 115
andrewboyson 10:f0854784e960 116 int action = pollForPacketToSend(type, &dataLength, pData);
andrewboyson 10:f0854784e960 117
andrewboyson 10:f0854784e960 118 *pSize = dataLength + HEADER_SIZE;
andrewboyson 10:f0854784e960 119 return action;
andrewboyson 10:f0854784e960 120 }
andrewboyson 10:f0854784e960 121
andrewboyson 10:f0854784e960 122 void UdpLogHeader(char* title, void* pPacket, uint16_t calculatedChecksum)
andrewboyson 10:f0854784e960 123 {
andrewboyson 10:f0854784e960 124 LogTimeF("UDP %s\r\n", title);
andrewboyson 14:e75a59c1123d 125 LogF(" Source port %hu\r\n", UdpSrcPort);
andrewboyson 14:e75a59c1123d 126 LogF(" Destination port %hu\r\n", UdpDstPort);
andrewboyson 10:f0854784e960 127 LogF(" Total length %hu\r\n", totalLength);
andrewboyson 10:f0854784e960 128 LogF(" Checksum (hex) %04hX\r\n", checksum);
andrewboyson 10:f0854784e960 129 LogF(" Calculated %04hX\r\n", calculatedChecksum);
andrewboyson 10:f0854784e960 130 }
andrewboyson 10:f0854784e960 131
andrewboyson 10:f0854784e960 132 void UdpMakeHeader(int size, void* pPacket)
andrewboyson 10:f0854784e960 133 {
andrewboyson 10:f0854784e960 134 struct header* pHeader = (header*)pPacket;
andrewboyson 10:f0854784e960 135
andrewboyson 14:e75a59c1123d 136 pHeader->dstPort = NetToHost16(UdpDstPort);
andrewboyson 14:e75a59c1123d 137 pHeader->srcPort = NetToHost16(UdpSrcPort);
andrewboyson 10:f0854784e960 138 pHeader->totalLength = NetToHost16(size);
andrewboyson 10:f0854784e960 139 pHeader->checksum = 0;
andrewboyson 10:f0854784e960 140
andrewboyson 10:f0854784e960 141 }
andrewboyson 10:f0854784e960 142 void UdpAddChecksum(void* pPacket, uint16_t checksum)
andrewboyson 10:f0854784e960 143 {
andrewboyson 10:f0854784e960 144 struct header* pHeader = (header*)pPacket;
andrewboyson 10:f0854784e960 145 pHeader->checksum = checksum;
andrewboyson 10:f0854784e960 146 }
andrewboyson 10:f0854784e960 147 void UdpReadHeader(void* pPacket, uint16_t size)
andrewboyson 10:f0854784e960 148 {
andrewboyson 10:f0854784e960 149 struct header* pHeader = (header*)pPacket;
andrewboyson 10:f0854784e960 150
andrewboyson 14:e75a59c1123d 151 UdpSrcPort = NetToHost16(pHeader->srcPort);
andrewboyson 14:e75a59c1123d 152 UdpDstPort = NetToHost16(pHeader->dstPort);
andrewboyson 10:f0854784e960 153 totalLength = NetToHost16(pHeader->totalLength);
andrewboyson 10:f0854784e960 154 checksum = NetToHost16(pHeader->checksum);
andrewboyson 10:f0854784e960 155 }