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
udp/udp.c@142:a8c0890a58d1, 2019-05-08 (annotated)
- Committer:
- andrewboyson
- Date:
- Wed May 08 12:15:13 2019 +0000
- Revision:
- 142:a8c0890a58d1
- Parent:
- 138:5ff0c7069300
- Child:
- 171:f708d6776752
Updated the lpc1768 module
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
andrewboyson | 61:aad055f1b0d1 | 1 | #include <stdint.h> |
andrewboyson | 61:aad055f1b0d1 | 2 | #include <stdbool.h> |
andrewboyson | 61:aad055f1b0d1 | 3 | |
andrewboyson | 121:bc048b65a630 | 4 | #include "log.h" |
andrewboyson | 121:bc048b65a630 | 5 | #include "net.h" |
andrewboyson | 37:793b39683406 | 6 | #include "action.h" |
andrewboyson | 121:bc048b65a630 | 7 | #include "udp.h" |
andrewboyson | 121:bc048b65a630 | 8 | #include "ntp.h" |
andrewboyson | 121:bc048b65a630 | 9 | #include "tftp.h" |
andrewboyson | 121:bc048b65a630 | 10 | #include "dhcp.h" |
andrewboyson | 121:bc048b65a630 | 11 | #include "dns.h" |
andrewboyson | 121:bc048b65a630 | 12 | #include "eth.h" |
andrewboyson | 121:bc048b65a630 | 13 | #include "ip4.h" |
andrewboyson | 121:bc048b65a630 | 14 | #include "ip6.h" |
andrewboyson | 121:bc048b65a630 | 15 | #include "slaac.h" |
andrewboyson | 121:bc048b65a630 | 16 | #include "ns.h" |
andrewboyson | 112:f8694d0b8858 | 17 | #include "ntpclient.h" |
andrewboyson | 142:a8c0890a58d1 | 18 | #include "restart.h" |
andrewboyson | 10:f0854784e960 | 19 | |
andrewboyson | 52:fbc5a46b5e16 | 20 | bool UdpTrace = true; |
andrewboyson | 10:f0854784e960 | 21 | |
andrewboyson | 138:5ff0c7069300 | 22 | static char* hdrPtrSrcPort (char* pPacket) { return pPacket + 0; } //2 |
andrewboyson | 138:5ff0c7069300 | 23 | static char* hdrPtrDstPort (char* pPacket) { return pPacket + 2; } //2 |
andrewboyson | 138:5ff0c7069300 | 24 | static char* hdrPtrTotalLength(char* pPacket) { return pPacket + 4; } //2 |
andrewboyson | 138:5ff0c7069300 | 25 | static char* hdrPtrChecksum (char* pPacket) { return pPacket + 6; } //2 |
andrewboyson | 138:5ff0c7069300 | 26 | static const int HEADER_LENGTH = 8; |
andrewboyson | 138:5ff0c7069300 | 27 | |
andrewboyson | 138:5ff0c7069300 | 28 | void UdpHdrSetChecksum(void* pPacket, uint16_t checksum) |
andrewboyson | 10:f0854784e960 | 29 | { |
andrewboyson | 138:5ff0c7069300 | 30 | NetDirect16(hdrPtrChecksum(pPacket), &checksum); |
andrewboyson | 138:5ff0c7069300 | 31 | } |
andrewboyson | 37:793b39683406 | 32 | static uint16_t srcPort; |
andrewboyson | 37:793b39683406 | 33 | static uint16_t dstPort; |
andrewboyson | 10:f0854784e960 | 34 | static uint16_t checksum; |
andrewboyson | 10:f0854784e960 | 35 | static uint16_t totalLength; |
andrewboyson | 10:f0854784e960 | 36 | |
andrewboyson | 138:5ff0c7069300 | 37 | static void readHeader(char* pPacket) |
andrewboyson | 138:5ff0c7069300 | 38 | { |
andrewboyson | 138:5ff0c7069300 | 39 | NetInvert16(&srcPort, hdrPtrSrcPort (pPacket)); |
andrewboyson | 138:5ff0c7069300 | 40 | NetInvert16(&dstPort, hdrPtrDstPort (pPacket)); |
andrewboyson | 138:5ff0c7069300 | 41 | NetDirect16(&checksum, hdrPtrChecksum (pPacket)); |
andrewboyson | 138:5ff0c7069300 | 42 | NetInvert16(&totalLength, hdrPtrTotalLength(pPacket)); |
andrewboyson | 138:5ff0c7069300 | 43 | } |
andrewboyson | 138:5ff0c7069300 | 44 | void UdpMakeHeader(int size, char* pPacket) |
andrewboyson | 59:e0e556c8bd46 | 45 | { |
andrewboyson | 138:5ff0c7069300 | 46 | checksum = 0; |
andrewboyson | 138:5ff0c7069300 | 47 | NetInvert16(hdrPtrSrcPort (pPacket), &srcPort ); |
andrewboyson | 138:5ff0c7069300 | 48 | NetInvert16(hdrPtrDstPort (pPacket), &dstPort ); |
andrewboyson | 138:5ff0c7069300 | 49 | NetDirect16(hdrPtrChecksum (pPacket), &checksum ); |
andrewboyson | 138:5ff0c7069300 | 50 | NetInvert16(hdrPtrTotalLength(pPacket), &size ); |
andrewboyson | 138:5ff0c7069300 | 51 | |
andrewboyson | 59:e0e556c8bd46 | 52 | } |
andrewboyson | 138:5ff0c7069300 | 53 | |
andrewboyson | 138:5ff0c7069300 | 54 | void UdpLogHeader(uint16_t calculatedChecksum) |
andrewboyson | 138:5ff0c7069300 | 55 | { |
andrewboyson | 138:5ff0c7069300 | 56 | if (NetTraceVerbose) |
andrewboyson | 138:5ff0c7069300 | 57 | { |
andrewboyson | 138:5ff0c7069300 | 58 | Log ("UDP header\r\n"); |
andrewboyson | 138:5ff0c7069300 | 59 | LogF(" Source port %hu\r\n", srcPort); |
andrewboyson | 138:5ff0c7069300 | 60 | LogF(" Destination port %hu\r\n", dstPort); |
andrewboyson | 138:5ff0c7069300 | 61 | LogF(" Total length %hu\r\n", totalLength); |
andrewboyson | 138:5ff0c7069300 | 62 | LogF(" Checksum (hex) %04hX\r\n", checksum); |
andrewboyson | 138:5ff0c7069300 | 63 | LogF(" Calculated %04hX\r\n", calculatedChecksum); |
andrewboyson | 138:5ff0c7069300 | 64 | } |
andrewboyson | 138:5ff0c7069300 | 65 | else |
andrewboyson | 138:5ff0c7069300 | 66 | { |
andrewboyson | 138:5ff0c7069300 | 67 | LogF("UDP header %hu >>> %hu\r\n", srcPort, dstPort); |
andrewboyson | 138:5ff0c7069300 | 68 | } |
andrewboyson | 138:5ff0c7069300 | 69 | } |
andrewboyson | 138:5ff0c7069300 | 70 | |
andrewboyson | 138:5ff0c7069300 | 71 | static int handlePort(void (*traceback)(void), int dataLengthRx, char* pDataRx, int* pPataLengthTx, char* pDataTx) |
andrewboyson | 10:f0854784e960 | 72 | { |
andrewboyson | 37:793b39683406 | 73 | switch (dstPort) |
andrewboyson | 10:f0854784e960 | 74 | { |
andrewboyson | 10:f0854784e960 | 75 | //Handle these |
andrewboyson | 59:e0e556c8bd46 | 76 | case DHCP_CLIENT_PORT: return DhcpHandleResponse (traceback, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); // 68 |
andrewboyson | 59:e0e556c8bd46 | 77 | case NTP_PORT: return NtpHandlePacketReceived(traceback, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); // 123 |
andrewboyson | 59:e0e556c8bd46 | 78 | case DNS_UNICAST_CLIENT_PORT: return DnsHandlePacketReceived(traceback, DNS_PROTOCOL_UDNS, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); //53053 |
andrewboyson | 59:e0e556c8bd46 | 79 | case DNS_MDNS_PORT: return DnsHandlePacketReceived(traceback, DNS_PROTOCOL_MDNS, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); // 5353 |
andrewboyson | 59:e0e556c8bd46 | 80 | case DNS_LLMNR_CLIENT_PORT: return DnsHandlePacketReceived(traceback, DNS_PROTOCOL_LLMNR, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); //53055 |
andrewboyson | 59:e0e556c8bd46 | 81 | case DNS_LLMNR_SERVER_PORT: return DnsHandlePacketReceived(traceback, DNS_PROTOCOL_LLMNR, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); // 5355 |
andrewboyson | 59:e0e556c8bd46 | 82 | case TFTP_CLIENT_PORT: return TftpHandlePacketReceived(traceback, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); //60690 |
andrewboyson | 10:f0854784e960 | 83 | |
andrewboyson | 10:f0854784e960 | 84 | //Quietly drop these |
andrewboyson | 42:222a4f45f916 | 85 | case DHCP_SERVER_PORT: //67 |
andrewboyson | 57:e0fb648acf48 | 86 | case TFTP_SERVER_PORT: //69 |
andrewboyson | 42:222a4f45f916 | 87 | case 137: //NETBIOS name service |
andrewboyson | 42:222a4f45f916 | 88 | case 138: //NETBIOS datagram service |
andrewboyson | 42:222a4f45f916 | 89 | case 139: //NETBIOS session service |
andrewboyson | 42:222a4f45f916 | 90 | case 500: //Key exchange - Xbox live |
andrewboyson | 42:222a4f45f916 | 91 | case 1900: //SSDP Simple Service Discovery Protocol (uPnP) |
andrewboyson | 42:222a4f45f916 | 92 | case 3074: //Xbox live |
andrewboyson | 42:222a4f45f916 | 93 | case 3076: //Call of Duty - Xbox |
andrewboyson | 52:fbc5a46b5e16 | 94 | case 5050: //Don't know but have been sent by Kate and my android phones. |
andrewboyson | 42:222a4f45f916 | 95 | case 5224: //Don't know but a burst was broadcast by Kate's phone containing '_logitech-reverse-bonjour._tcp.local.5446 192.168.1.36 string' |
andrewboyson | 52:fbc5a46b5e16 | 96 | case 9956: //Alljoyn part of Allseen IoT services |
andrewboyson | 42:222a4f45f916 | 97 | case 9997: //VLC |
andrewboyson | 42:222a4f45f916 | 98 | case 9998: //VLC |
andrewboyson | 42:222a4f45f916 | 99 | case 9999: //VLC |
andrewboyson | 42:222a4f45f916 | 100 | case 17500: //Dropbox LAN sync |
andrewboyson | 95:b9a99049016a | 101 | case 57621: //Spotify P2P |
andrewboyson | 10:f0854784e960 | 102 | return DO_NOTHING; |
andrewboyson | 10:f0854784e960 | 103 | |
andrewboyson | 10:f0854784e960 | 104 | //Report anything else |
andrewboyson | 10:f0854784e960 | 105 | default: |
andrewboyson | 52:fbc5a46b5e16 | 106 | if (UdpTrace) |
andrewboyson | 52:fbc5a46b5e16 | 107 | { |
andrewboyson | 52:fbc5a46b5e16 | 108 | LogTimeF("UDP unknown port %d\r\n", dstPort); |
andrewboyson | 52:fbc5a46b5e16 | 109 | traceback(); //This will already include the UDP header |
andrewboyson | 52:fbc5a46b5e16 | 110 | } |
andrewboyson | 10:f0854784e960 | 111 | return DO_NOTHING; |
andrewboyson | 10:f0854784e960 | 112 | } |
andrewboyson | 10:f0854784e960 | 113 | } |
andrewboyson | 138:5ff0c7069300 | 114 | int UdpHandleReceivedPacket(void (*traceback)(void), int sizeRx, char* pPacketRx, int* pSizeTx, char* pPacketTx) |
andrewboyson | 10:f0854784e960 | 115 | { |
andrewboyson | 142:a8c0890a58d1 | 116 | int lastRestartPoint = RestartPoint; |
andrewboyson | 142:a8c0890a58d1 | 117 | RestartPoint = FAULT_POINT_UdpHandleReceivedPacket; |
andrewboyson | 121:bc048b65a630 | 118 | |
andrewboyson | 138:5ff0c7069300 | 119 | readHeader(pPacketRx); |
andrewboyson | 59:e0e556c8bd46 | 120 | |
andrewboyson | 138:5ff0c7069300 | 121 | void* pDataRx = pPacketRx + HEADER_LENGTH; |
andrewboyson | 138:5ff0c7069300 | 122 | void* pDataTx = pPacketTx + HEADER_LENGTH; |
andrewboyson | 138:5ff0c7069300 | 123 | int dataLengthRx = sizeRx - HEADER_LENGTH; |
andrewboyson | 138:5ff0c7069300 | 124 | int dataLengthTx = *pSizeTx - HEADER_LENGTH; |
andrewboyson | 10:f0854784e960 | 125 | |
andrewboyson | 59:e0e556c8bd46 | 126 | int action = handlePort(traceback, dataLengthRx, pDataRx, &dataLengthTx, pDataTx); |
andrewboyson | 10:f0854784e960 | 127 | |
andrewboyson | 138:5ff0c7069300 | 128 | *pSizeTx = dataLengthTx + HEADER_LENGTH; |
andrewboyson | 10:f0854784e960 | 129 | |
andrewboyson | 37:793b39683406 | 130 | uint16_t tmpPort = dstPort; |
andrewboyson | 37:793b39683406 | 131 | dstPort = srcPort; |
andrewboyson | 37:793b39683406 | 132 | srcPort = tmpPort; |
andrewboyson | 10:f0854784e960 | 133 | |
andrewboyson | 142:a8c0890a58d1 | 134 | RestartPoint = lastRestartPoint; |
andrewboyson | 10:f0854784e960 | 135 | return action; |
andrewboyson | 10:f0854784e960 | 136 | } |
andrewboyson | 138:5ff0c7069300 | 137 | static int pollForPacketToSend(int type, int* pDataLength, char* pData) |
andrewboyson | 10:f0854784e960 | 138 | { |
andrewboyson | 37:793b39683406 | 139 | int action = DO_NOTHING; |
andrewboyson | 10:f0854784e960 | 140 | |
andrewboyson | 10:f0854784e960 | 141 | if (!action && type == IPV4) //DHCP only works under IPv4 |
andrewboyson | 10:f0854784e960 | 142 | { |
andrewboyson | 10:f0854784e960 | 143 | action = DhcpPollForRequestToSend(pData, pDataLength); |
andrewboyson | 10:f0854784e960 | 144 | if (action) |
andrewboyson | 10:f0854784e960 | 145 | { |
andrewboyson | 37:793b39683406 | 146 | srcPort = DHCP_CLIENT_PORT; |
andrewboyson | 37:793b39683406 | 147 | dstPort = DHCP_SERVER_PORT; |
andrewboyson | 10:f0854784e960 | 148 | } |
andrewboyson | 10:f0854784e960 | 149 | } |
andrewboyson | 10:f0854784e960 | 150 | |
andrewboyson | 83:08c983006a6e | 151 | if (!action && type == (DnsSendRequestsViaIp4 ? IPV4 : IPV6)) //DNS is agnostic |
andrewboyson | 10:f0854784e960 | 152 | { |
andrewboyson | 13:9cd54f7db57a | 153 | action = DnsPollForPacketToSend(pData, pDataLength); |
andrewboyson | 37:793b39683406 | 154 | int dest = ActionGetDestPart(action); |
andrewboyson | 37:793b39683406 | 155 | if (dest) |
andrewboyson | 10:f0854784e960 | 156 | { |
andrewboyson | 37:793b39683406 | 157 | switch (dest) |
andrewboyson | 10:f0854784e960 | 158 | { |
andrewboyson | 37:793b39683406 | 159 | case UNICAST_DNS: srcPort = DNS_UNICAST_CLIENT_PORT; dstPort = DNS_UNICAST_SERVER_PORT; break; //53053, 53 |
andrewboyson | 37:793b39683406 | 160 | case MULTICAST_MDNS: srcPort = DNS_MDNS_PORT; dstPort = DNS_MDNS_PORT; break; // 5353, 5353 |
andrewboyson | 37:793b39683406 | 161 | case MULTICAST_LLMNR: srcPort = DNS_LLMNR_CLIENT_PORT; dstPort = DNS_LLMNR_SERVER_PORT; break; //53055, 5355 |
andrewboyson | 10:f0854784e960 | 162 | |
andrewboyson | 10:f0854784e960 | 163 | //Report anything else |
andrewboyson | 10:f0854784e960 | 164 | default: |
andrewboyson | 37:793b39683406 | 165 | LogTimeF("DNS unknown dest %d\r\n", dest); |
andrewboyson | 10:f0854784e960 | 166 | return DO_NOTHING; |
andrewboyson | 10:f0854784e960 | 167 | } |
andrewboyson | 10:f0854784e960 | 168 | } |
andrewboyson | 10:f0854784e960 | 169 | } |
andrewboyson | 113:904b40231907 | 170 | if (!action && type == (NtpClientQuerySendRequestsViaIp4 ? IPV4 : IPV6)) //NTP is agnostic |
andrewboyson | 22:914b970356f0 | 171 | { |
andrewboyson | 22:914b970356f0 | 172 | action = NtpPollForPacketToSend(type, pData, pDataLength); |
andrewboyson | 22:914b970356f0 | 173 | if (action) |
andrewboyson | 22:914b970356f0 | 174 | { |
andrewboyson | 37:793b39683406 | 175 | srcPort = NTP_PORT; |
andrewboyson | 37:793b39683406 | 176 | dstPort = NTP_PORT; |
andrewboyson | 22:914b970356f0 | 177 | } |
andrewboyson | 22:914b970356f0 | 178 | } |
andrewboyson | 83:08c983006a6e | 179 | if (!action && type == (TftpSendRequestsViaIp4 ? IPV4 : IPV6)) //TFTP is agnostic |
andrewboyson | 57:e0fb648acf48 | 180 | { |
andrewboyson | 57:e0fb648acf48 | 181 | action = TftpPollForPacketToSend(type, pData, pDataLength); |
andrewboyson | 57:e0fb648acf48 | 182 | if (action) |
andrewboyson | 57:e0fb648acf48 | 183 | { |
andrewboyson | 57:e0fb648acf48 | 184 | srcPort = TFTP_CLIENT_PORT; |
andrewboyson | 57:e0fb648acf48 | 185 | dstPort = TFTP_SERVER_PORT; |
andrewboyson | 57:e0fb648acf48 | 186 | } |
andrewboyson | 57:e0fb648acf48 | 187 | } |
andrewboyson | 37:793b39683406 | 188 | |
andrewboyson | 10:f0854784e960 | 189 | return action; |
andrewboyson | 10:f0854784e960 | 190 | } |
andrewboyson | 138:5ff0c7069300 | 191 | int UdpPollForPacketToSend(int type, int* pSize, char* pPacket) |
andrewboyson | 10:f0854784e960 | 192 | { |
andrewboyson | 138:5ff0c7069300 | 193 | void* pData = pPacket + HEADER_LENGTH; |
andrewboyson | 138:5ff0c7069300 | 194 | int dataLength = *pSize - HEADER_LENGTH; |
andrewboyson | 10:f0854784e960 | 195 | |
andrewboyson | 10:f0854784e960 | 196 | int action = pollForPacketToSend(type, &dataLength, pData); |
andrewboyson | 10:f0854784e960 | 197 | |
andrewboyson | 138:5ff0c7069300 | 198 | *pSize = dataLength + HEADER_LENGTH; |
andrewboyson | 10:f0854784e960 | 199 | return action; |
andrewboyson | 10:f0854784e960 | 200 | } |