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@112:f8694d0b8858, 2019-01-21 (annotated)
- Committer:
- andrewboyson
- Date:
- Mon Jan 21 16:58:28 2019 +0000
- Revision:
- 112:f8694d0b8858
- Parent:
- 95:b9a99049016a
- Child:
- 113:904b40231907
Added NTP client into library. Added NTP multicast to client.
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 | 37:793b39683406 | 4 | #include "log.h" |
andrewboyson | 37:793b39683406 | 5 | #include "net.h" |
andrewboyson | 37:793b39683406 | 6 | #include "action.h" |
andrewboyson | 37:793b39683406 | 7 | #include "udp.h" |
andrewboyson | 37:793b39683406 | 8 | #include "ntp.h" |
andrewboyson | 57:e0fb648acf48 | 9 | #include "tftp.h" |
andrewboyson | 37:793b39683406 | 10 | #include "dhcp.h" |
andrewboyson | 37:793b39683406 | 11 | #include "dns.h" |
andrewboyson | 37:793b39683406 | 12 | #include "eth.h" |
andrewboyson | 37:793b39683406 | 13 | #include "ip4.h" |
andrewboyson | 37:793b39683406 | 14 | #include "ip6.h" |
andrewboyson | 37:793b39683406 | 15 | #include "slaac.h" |
andrewboyson | 37:793b39683406 | 16 | #include "ns.h" |
andrewboyson | 112:f8694d0b8858 | 17 | #include "ntpclient.h" |
andrewboyson | 10:f0854784e960 | 18 | |
andrewboyson | 52:fbc5a46b5e16 | 19 | bool UdpTrace = true; |
andrewboyson | 10:f0854784e960 | 20 | |
andrewboyson | 10:f0854784e960 | 21 | __packed struct header |
andrewboyson | 10:f0854784e960 | 22 | { |
andrewboyson | 10:f0854784e960 | 23 | uint16_t srcPort; |
andrewboyson | 10:f0854784e960 | 24 | uint16_t dstPort; |
andrewboyson | 10:f0854784e960 | 25 | uint16_t totalLength; |
andrewboyson | 10:f0854784e960 | 26 | uint16_t checksum; |
andrewboyson | 10:f0854784e960 | 27 | }; |
andrewboyson | 37:793b39683406 | 28 | static uint16_t srcPort; |
andrewboyson | 37:793b39683406 | 29 | static uint16_t dstPort; |
andrewboyson | 10:f0854784e960 | 30 | static uint16_t checksum; |
andrewboyson | 10:f0854784e960 | 31 | static uint16_t totalLength; |
andrewboyson | 10:f0854784e960 | 32 | |
andrewboyson | 59:e0e556c8bd46 | 33 | static void readHeader(void* pPacket, uint16_t size) |
andrewboyson | 59:e0e556c8bd46 | 34 | { |
andrewboyson | 61:aad055f1b0d1 | 35 | struct header* pHeader = (struct header*)pPacket; |
andrewboyson | 59:e0e556c8bd46 | 36 | |
andrewboyson | 59:e0e556c8bd46 | 37 | srcPort = NetToHost16(pHeader->srcPort); |
andrewboyson | 59:e0e556c8bd46 | 38 | dstPort = NetToHost16(pHeader->dstPort); |
andrewboyson | 59:e0e556c8bd46 | 39 | totalLength = NetToHost16(pHeader->totalLength); |
andrewboyson | 59:e0e556c8bd46 | 40 | checksum = NetToHost16(pHeader->checksum); |
andrewboyson | 59:e0e556c8bd46 | 41 | } |
andrewboyson | 59:e0e556c8bd46 | 42 | static int handlePort(void (*traceback)(void), int dataLengthRx, void* pDataRx, int* pPataLengthTx, void* pDataTx) |
andrewboyson | 10:f0854784e960 | 43 | { |
andrewboyson | 37:793b39683406 | 44 | switch (dstPort) |
andrewboyson | 10:f0854784e960 | 45 | { |
andrewboyson | 10:f0854784e960 | 46 | //Handle these |
andrewboyson | 59:e0e556c8bd46 | 47 | case DHCP_CLIENT_PORT: return DhcpHandleResponse (traceback, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); // 68 |
andrewboyson | 59:e0e556c8bd46 | 48 | case NTP_PORT: return NtpHandlePacketReceived(traceback, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); // 123 |
andrewboyson | 59:e0e556c8bd46 | 49 | case DNS_UNICAST_CLIENT_PORT: return DnsHandlePacketReceived(traceback, DNS_PROTOCOL_UDNS, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); //53053 |
andrewboyson | 59:e0e556c8bd46 | 50 | case DNS_MDNS_PORT: return DnsHandlePacketReceived(traceback, DNS_PROTOCOL_MDNS, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); // 5353 |
andrewboyson | 59:e0e556c8bd46 | 51 | case DNS_LLMNR_CLIENT_PORT: return DnsHandlePacketReceived(traceback, DNS_PROTOCOL_LLMNR, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); //53055 |
andrewboyson | 59:e0e556c8bd46 | 52 | case DNS_LLMNR_SERVER_PORT: return DnsHandlePacketReceived(traceback, DNS_PROTOCOL_LLMNR, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); // 5355 |
andrewboyson | 59:e0e556c8bd46 | 53 | case TFTP_CLIENT_PORT: return TftpHandlePacketReceived(traceback, dataLengthRx, pDataRx, pPataLengthTx, pDataTx); //60690 |
andrewboyson | 10:f0854784e960 | 54 | |
andrewboyson | 10:f0854784e960 | 55 | //Quietly drop these |
andrewboyson | 42:222a4f45f916 | 56 | case DHCP_SERVER_PORT: //67 |
andrewboyson | 57:e0fb648acf48 | 57 | case TFTP_SERVER_PORT: //69 |
andrewboyson | 42:222a4f45f916 | 58 | case 137: //NETBIOS name service |
andrewboyson | 42:222a4f45f916 | 59 | case 138: //NETBIOS datagram service |
andrewboyson | 42:222a4f45f916 | 60 | case 139: //NETBIOS session service |
andrewboyson | 42:222a4f45f916 | 61 | case 500: //Key exchange - Xbox live |
andrewboyson | 42:222a4f45f916 | 62 | case 1900: //SSDP Simple Service Discovery Protocol (uPnP) |
andrewboyson | 42:222a4f45f916 | 63 | case 3074: //Xbox live |
andrewboyson | 42:222a4f45f916 | 64 | case 3076: //Call of Duty - Xbox |
andrewboyson | 52:fbc5a46b5e16 | 65 | case 5050: //Don't know but have been sent by Kate and my android phones. |
andrewboyson | 42:222a4f45f916 | 66 | 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 | 67 | case 9956: //Alljoyn part of Allseen IoT services |
andrewboyson | 42:222a4f45f916 | 68 | case 9997: //VLC |
andrewboyson | 42:222a4f45f916 | 69 | case 9998: //VLC |
andrewboyson | 42:222a4f45f916 | 70 | case 9999: //VLC |
andrewboyson | 42:222a4f45f916 | 71 | case 17500: //Dropbox LAN sync |
andrewboyson | 95:b9a99049016a | 72 | case 57621: //Spotify P2P |
andrewboyson | 10:f0854784e960 | 73 | return DO_NOTHING; |
andrewboyson | 10:f0854784e960 | 74 | |
andrewboyson | 10:f0854784e960 | 75 | //Report anything else |
andrewboyson | 10:f0854784e960 | 76 | default: |
andrewboyson | 52:fbc5a46b5e16 | 77 | if (UdpTrace) |
andrewboyson | 52:fbc5a46b5e16 | 78 | { |
andrewboyson | 52:fbc5a46b5e16 | 79 | LogTimeF("UDP unknown port %d\r\n", dstPort); |
andrewboyson | 52:fbc5a46b5e16 | 80 | traceback(); //This will already include the UDP header |
andrewboyson | 52:fbc5a46b5e16 | 81 | } |
andrewboyson | 10:f0854784e960 | 82 | return DO_NOTHING; |
andrewboyson | 10:f0854784e960 | 83 | } |
andrewboyson | 10:f0854784e960 | 84 | } |
andrewboyson | 59:e0e556c8bd46 | 85 | int UdpHandleReceivedPacket(void (*traceback)(void), int sizeRx, void* pPacketRx, int* pSizeTx, void* pPacketTx) |
andrewboyson | 10:f0854784e960 | 86 | { |
andrewboyson | 59:e0e556c8bd46 | 87 | readHeader(pPacketRx, sizeRx); |
andrewboyson | 59:e0e556c8bd46 | 88 | |
andrewboyson | 61:aad055f1b0d1 | 89 | void* pDataRx = (char*)pPacketRx + sizeof(struct header); |
andrewboyson | 61:aad055f1b0d1 | 90 | void* pDataTx = (char*)pPacketTx + sizeof(struct header); |
andrewboyson | 61:aad055f1b0d1 | 91 | int dataLengthRx = sizeRx - sizeof(struct header); |
andrewboyson | 61:aad055f1b0d1 | 92 | int dataLengthTx = *pSizeTx - sizeof(struct header); |
andrewboyson | 10:f0854784e960 | 93 | |
andrewboyson | 59:e0e556c8bd46 | 94 | int action = handlePort(traceback, dataLengthRx, pDataRx, &dataLengthTx, pDataTx); |
andrewboyson | 10:f0854784e960 | 95 | |
andrewboyson | 61:aad055f1b0d1 | 96 | *pSizeTx = dataLengthTx + sizeof(struct header); |
andrewboyson | 10:f0854784e960 | 97 | |
andrewboyson | 37:793b39683406 | 98 | uint16_t tmpPort = dstPort; |
andrewboyson | 37:793b39683406 | 99 | dstPort = srcPort; |
andrewboyson | 37:793b39683406 | 100 | srcPort = tmpPort; |
andrewboyson | 10:f0854784e960 | 101 | |
andrewboyson | 10:f0854784e960 | 102 | return action; |
andrewboyson | 10:f0854784e960 | 103 | } |
andrewboyson | 10:f0854784e960 | 104 | static int pollForPacketToSend(int type, int* pDataLength, void* pData) |
andrewboyson | 10:f0854784e960 | 105 | { |
andrewboyson | 37:793b39683406 | 106 | int action = DO_NOTHING; |
andrewboyson | 10:f0854784e960 | 107 | |
andrewboyson | 10:f0854784e960 | 108 | if (!action && type == IPV4) //DHCP only works under IPv4 |
andrewboyson | 10:f0854784e960 | 109 | { |
andrewboyson | 10:f0854784e960 | 110 | action = DhcpPollForRequestToSend(pData, pDataLength); |
andrewboyson | 10:f0854784e960 | 111 | if (action) |
andrewboyson | 10:f0854784e960 | 112 | { |
andrewboyson | 37:793b39683406 | 113 | srcPort = DHCP_CLIENT_PORT; |
andrewboyson | 37:793b39683406 | 114 | dstPort = DHCP_SERVER_PORT; |
andrewboyson | 10:f0854784e960 | 115 | } |
andrewboyson | 10:f0854784e960 | 116 | } |
andrewboyson | 10:f0854784e960 | 117 | |
andrewboyson | 83:08c983006a6e | 118 | if (!action && type == (DnsSendRequestsViaIp4 ? IPV4 : IPV6)) //DNS is agnostic |
andrewboyson | 10:f0854784e960 | 119 | { |
andrewboyson | 13:9cd54f7db57a | 120 | action = DnsPollForPacketToSend(pData, pDataLength); |
andrewboyson | 37:793b39683406 | 121 | int dest = ActionGetDestPart(action); |
andrewboyson | 37:793b39683406 | 122 | if (dest) |
andrewboyson | 10:f0854784e960 | 123 | { |
andrewboyson | 37:793b39683406 | 124 | switch (dest) |
andrewboyson | 10:f0854784e960 | 125 | { |
andrewboyson | 37:793b39683406 | 126 | case UNICAST_DNS: srcPort = DNS_UNICAST_CLIENT_PORT; dstPort = DNS_UNICAST_SERVER_PORT; break; //53053, 53 |
andrewboyson | 37:793b39683406 | 127 | case MULTICAST_MDNS: srcPort = DNS_MDNS_PORT; dstPort = DNS_MDNS_PORT; break; // 5353, 5353 |
andrewboyson | 37:793b39683406 | 128 | case MULTICAST_LLMNR: srcPort = DNS_LLMNR_CLIENT_PORT; dstPort = DNS_LLMNR_SERVER_PORT; break; //53055, 5355 |
andrewboyson | 10:f0854784e960 | 129 | |
andrewboyson | 10:f0854784e960 | 130 | //Report anything else |
andrewboyson | 10:f0854784e960 | 131 | default: |
andrewboyson | 37:793b39683406 | 132 | LogTimeF("DNS unknown dest %d\r\n", dest); |
andrewboyson | 10:f0854784e960 | 133 | return DO_NOTHING; |
andrewboyson | 10:f0854784e960 | 134 | } |
andrewboyson | 10:f0854784e960 | 135 | } |
andrewboyson | 10:f0854784e960 | 136 | } |
andrewboyson | 112:f8694d0b8858 | 137 | if (!action && type == (NtpClientSendRequestsViaIp4 ? IPV4 : IPV6)) //NTP is agnostic |
andrewboyson | 22:914b970356f0 | 138 | { |
andrewboyson | 22:914b970356f0 | 139 | action = NtpPollForPacketToSend(type, pData, pDataLength); |
andrewboyson | 22:914b970356f0 | 140 | if (action) |
andrewboyson | 22:914b970356f0 | 141 | { |
andrewboyson | 37:793b39683406 | 142 | srcPort = NTP_PORT; |
andrewboyson | 37:793b39683406 | 143 | dstPort = NTP_PORT; |
andrewboyson | 22:914b970356f0 | 144 | } |
andrewboyson | 22:914b970356f0 | 145 | } |
andrewboyson | 83:08c983006a6e | 146 | if (!action && type == (TftpSendRequestsViaIp4 ? IPV4 : IPV6)) //TFTP is agnostic |
andrewboyson | 57:e0fb648acf48 | 147 | { |
andrewboyson | 57:e0fb648acf48 | 148 | action = TftpPollForPacketToSend(type, pData, pDataLength); |
andrewboyson | 57:e0fb648acf48 | 149 | if (action) |
andrewboyson | 57:e0fb648acf48 | 150 | { |
andrewboyson | 57:e0fb648acf48 | 151 | srcPort = TFTP_CLIENT_PORT; |
andrewboyson | 57:e0fb648acf48 | 152 | dstPort = TFTP_SERVER_PORT; |
andrewboyson | 57:e0fb648acf48 | 153 | } |
andrewboyson | 57:e0fb648acf48 | 154 | } |
andrewboyson | 37:793b39683406 | 155 | |
andrewboyson | 10:f0854784e960 | 156 | return action; |
andrewboyson | 10:f0854784e960 | 157 | } |
andrewboyson | 10:f0854784e960 | 158 | int UdpPollForPacketToSend(int type, int* pSize, void* pPacket) |
andrewboyson | 10:f0854784e960 | 159 | { |
andrewboyson | 61:aad055f1b0d1 | 160 | void* pData = (char*)pPacket + sizeof(struct header); |
andrewboyson | 61:aad055f1b0d1 | 161 | int dataLength = *pSize - sizeof(struct header); |
andrewboyson | 10:f0854784e960 | 162 | |
andrewboyson | 10:f0854784e960 | 163 | int action = pollForPacketToSend(type, &dataLength, pData); |
andrewboyson | 10:f0854784e960 | 164 | |
andrewboyson | 61:aad055f1b0d1 | 165 | *pSize = dataLength + sizeof(struct header); |
andrewboyson | 10:f0854784e960 | 166 | return action; |
andrewboyson | 10:f0854784e960 | 167 | } |
andrewboyson | 10:f0854784e960 | 168 | |
andrewboyson | 37:793b39683406 | 169 | void UdpLogHeader(uint16_t calculatedChecksum) |
andrewboyson | 43:bc028d5a6424 | 170 | { |
andrewboyson | 43:bc028d5a6424 | 171 | if (NetTraceVerbose) |
andrewboyson | 43:bc028d5a6424 | 172 | { |
andrewboyson | 43:bc028d5a6424 | 173 | Log ("UDP header\r\n"); |
andrewboyson | 43:bc028d5a6424 | 174 | LogF(" Source port %hu\r\n", srcPort); |
andrewboyson | 43:bc028d5a6424 | 175 | LogF(" Destination port %hu\r\n", dstPort); |
andrewboyson | 43:bc028d5a6424 | 176 | LogF(" Total length %hu\r\n", totalLength); |
andrewboyson | 43:bc028d5a6424 | 177 | LogF(" Checksum (hex) %04hX\r\n", checksum); |
andrewboyson | 43:bc028d5a6424 | 178 | LogF(" Calculated %04hX\r\n", calculatedChecksum); |
andrewboyson | 43:bc028d5a6424 | 179 | } |
andrewboyson | 43:bc028d5a6424 | 180 | else |
andrewboyson | 43:bc028d5a6424 | 181 | { |
andrewboyson | 44:83ce5ace337b | 182 | LogF("UDP header %hu >>> %hu\r\n", srcPort, dstPort); |
andrewboyson | 43:bc028d5a6424 | 183 | } |
andrewboyson | 10:f0854784e960 | 184 | } |
andrewboyson | 10:f0854784e960 | 185 | |
andrewboyson | 10:f0854784e960 | 186 | void UdpMakeHeader(int size, void* pPacket) |
andrewboyson | 10:f0854784e960 | 187 | { |
andrewboyson | 61:aad055f1b0d1 | 188 | struct header* pHeader = (struct header*)pPacket; |
andrewboyson | 10:f0854784e960 | 189 | |
andrewboyson | 37:793b39683406 | 190 | pHeader->dstPort = NetToHost16(dstPort); |
andrewboyson | 37:793b39683406 | 191 | pHeader->srcPort = NetToHost16(srcPort); |
andrewboyson | 10:f0854784e960 | 192 | pHeader->totalLength = NetToHost16(size); |
andrewboyson | 10:f0854784e960 | 193 | pHeader->checksum = 0; |
andrewboyson | 10:f0854784e960 | 194 | |
andrewboyson | 10:f0854784e960 | 195 | } |
andrewboyson | 10:f0854784e960 | 196 | void UdpAddChecksum(void* pPacket, uint16_t checksum) |
andrewboyson | 10:f0854784e960 | 197 | { |
andrewboyson | 61:aad055f1b0d1 | 198 | struct header* pHeader = (struct header*)pPacket; |
andrewboyson | 10:f0854784e960 | 199 | pHeader->checksum = checksum; |
andrewboyson | 10:f0854784e960 | 200 | } |