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
ip6/udptcp6.c@80:4ef1500fca1d, 2018-11-15 (annotated)
- Committer:
- andrewboyson
- Date:
- Thu Nov 15 16:55:29 2018 +0000
- Revision:
- 80:4ef1500fca1d
- Parent:
- 74:c3756bfa960e
- Child:
- 136:8a65abb0dc63
Used local ip scope to determine the local address used in TCP.
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 <string.h> |
andrewboyson | 61:aad055f1b0d1 | 3 | |
andrewboyson | 74:c3756bfa960e | 4 | #include "log.h" |
andrewboyson | 74:c3756bfa960e | 5 | #include "net.h" |
andrewboyson | 74:c3756bfa960e | 6 | #include "action.h" |
andrewboyson | 74:c3756bfa960e | 7 | #include "eth.h" |
andrewboyson | 74:c3756bfa960e | 8 | #include "dhcp.h" |
andrewboyson | 74:c3756bfa960e | 9 | #include "ns.h" |
andrewboyson | 74:c3756bfa960e | 10 | #include "ip.h" |
andrewboyson | 49:1a6336f2b3f9 | 11 | #include "ip6addr.h" |
andrewboyson | 74:c3756bfa960e | 12 | #include "slaac.h" |
andrewboyson | 74:c3756bfa960e | 13 | #include "tcp.h" |
andrewboyson | 74:c3756bfa960e | 14 | #include "tcprecv.h" |
andrewboyson | 74:c3756bfa960e | 15 | #include "tcpsend.h" |
andrewboyson | 74:c3756bfa960e | 16 | #include "tcphdr.h" |
andrewboyson | 74:c3756bfa960e | 17 | #include "udp.h" |
andrewboyson | 74:c3756bfa960e | 18 | #include "led.h" |
andrewboyson | 74:c3756bfa960e | 19 | #include "ar6.h" |
andrewboyson | 11:c051adb70c5a | 20 | |
andrewboyson | 11:c051adb70c5a | 21 | static uint16_t calculateChecksum(uint8_t pro, char* pSrcIp, char* pDstIp, int size, void* pPacket) |
andrewboyson | 11:c051adb70c5a | 22 | { |
andrewboyson | 11:c051adb70c5a | 23 | __packed struct pseudo |
andrewboyson | 11:c051adb70c5a | 24 | { |
andrewboyson | 11:c051adb70c5a | 25 | char src[16]; |
andrewboyson | 11:c051adb70c5a | 26 | char dst[16]; |
andrewboyson | 11:c051adb70c5a | 27 | uint8_t zer; |
andrewboyson | 11:c051adb70c5a | 28 | uint8_t pro; |
andrewboyson | 11:c051adb70c5a | 29 | uint16_t len; |
andrewboyson | 11:c051adb70c5a | 30 | } pseudo; |
andrewboyson | 11:c051adb70c5a | 31 | |
andrewboyson | 11:c051adb70c5a | 32 | memcpy(pseudo.src, pSrcIp, 16); |
andrewboyson | 11:c051adb70c5a | 33 | memcpy(pseudo.dst, pDstIp, 16); |
andrewboyson | 11:c051adb70c5a | 34 | pseudo.zer = 0; |
andrewboyson | 11:c051adb70c5a | 35 | pseudo.pro = pro; |
andrewboyson | 11:c051adb70c5a | 36 | pseudo.len = NetToHost16(size); |
andrewboyson | 11:c051adb70c5a | 37 | |
andrewboyson | 11:c051adb70c5a | 38 | return NetCheckSumTwo(sizeof(pseudo), &pseudo, size, pPacket); |
andrewboyson | 11:c051adb70c5a | 39 | } |
andrewboyson | 44:83ce5ace337b | 40 | static void finalisePacket(uint8_t pro, int action, int scope, void* pPacket, int size, char* pSrcIp, char* pDstIp) |
andrewboyson | 11:c051adb70c5a | 41 | { |
andrewboyson | 11:c051adb70c5a | 42 | if (!action) return; |
andrewboyson | 11:c051adb70c5a | 43 | |
andrewboyson | 49:1a6336f2b3f9 | 44 | Ip6AddressFromDest (ActionGetDestPart(action), pDstIp); |
andrewboyson | 49:1a6336f2b3f9 | 45 | SlaacAddressFromScope(scope, pSrcIp); |
andrewboyson | 44:83ce5ace337b | 46 | |
andrewboyson | 11:c051adb70c5a | 47 | switch (pro) |
andrewboyson | 11:c051adb70c5a | 48 | { |
andrewboyson | 74:c3756bfa960e | 49 | case TCP: TcpHdrWriteToPacket(pPacket); break; |
andrewboyson | 11:c051adb70c5a | 50 | case UDP: UdpMakeHeader(size, pPacket); break; |
andrewboyson | 11:c051adb70c5a | 51 | } |
andrewboyson | 61:aad055f1b0d1 | 52 | |
andrewboyson | 11:c051adb70c5a | 53 | uint16_t checksum = calculateChecksum(pro, pSrcIp, pDstIp, size, pPacket); |
andrewboyson | 11:c051adb70c5a | 54 | |
andrewboyson | 11:c051adb70c5a | 55 | switch (pro) |
andrewboyson | 11:c051adb70c5a | 56 | { |
andrewboyson | 74:c3756bfa960e | 57 | case TCP: TcpHdrAddChecksumToPacket(pPacket, checksum); break; |
andrewboyson | 11:c051adb70c5a | 58 | case UDP: UdpAddChecksum(pPacket, checksum); break; |
andrewboyson | 11:c051adb70c5a | 59 | } |
andrewboyson | 11:c051adb70c5a | 60 | |
andrewboyson | 37:793b39683406 | 61 | if (ActionGetTracePart(action)) |
andrewboyson | 11:c051adb70c5a | 62 | { |
andrewboyson | 37:793b39683406 | 63 | switch (pro) |
andrewboyson | 37:793b39683406 | 64 | { |
andrewboyson | 73:43e3d7fb3d60 | 65 | case TCP: TcpHdrLog(0); break; |
andrewboyson | 56:35117a8b5c65 | 66 | case UDP: UdpLogHeader(0); break; |
andrewboyson | 37:793b39683406 | 67 | } |
andrewboyson | 37:793b39683406 | 68 | } |
andrewboyson | 37:793b39683406 | 69 | } |
andrewboyson | 37:793b39683406 | 70 | static void (*pTraceBack)(void); |
andrewboyson | 37:793b39683406 | 71 | static int tracePacketProtocol; |
andrewboyson | 37:793b39683406 | 72 | static uint16_t calculatedChecksum; |
andrewboyson | 37:793b39683406 | 73 | static void trace() |
andrewboyson | 37:793b39683406 | 74 | { |
andrewboyson | 37:793b39683406 | 75 | pTraceBack(); |
andrewboyson | 37:793b39683406 | 76 | switch(tracePacketProtocol) |
andrewboyson | 37:793b39683406 | 77 | { |
andrewboyson | 56:35117a8b5c65 | 78 | case UDP: UdpLogHeader(calculatedChecksum); break; |
andrewboyson | 73:43e3d7fb3d60 | 79 | case TCP: TcpHdrLog(calculatedChecksum); break; |
andrewboyson | 37:793b39683406 | 80 | default: LogTimeF("UdpTcp6 - traceback unrecognised protocol %d\r\n", tracePacketProtocol); break; |
andrewboyson | 11:c051adb70c5a | 81 | } |
andrewboyson | 11:c051adb70c5a | 82 | } |
andrewboyson | 11:c051adb70c5a | 83 | |
andrewboyson | 74:c3756bfa960e | 84 | int Tcp6HandleReceivedPacket(void (*traceback)(void), int scope, void* pPacketRx, int sizeRx, void* pPacketTx, int* pSizeTx, char* pSrcIp, char* pDstIp, int remArIndex) |
andrewboyson | 11:c051adb70c5a | 85 | { |
andrewboyson | 37:793b39683406 | 86 | pTraceBack = traceback; |
andrewboyson | 37:793b39683406 | 87 | tracePacketProtocol = TCP; |
andrewboyson | 59:e0e556c8bd46 | 88 | calculatedChecksum = calculateChecksum(TCP, pSrcIp, pDstIp, sizeRx, pPacketRx); |
andrewboyson | 11:c051adb70c5a | 89 | |
andrewboyson | 80:4ef1500fca1d | 90 | int action = TcpHandleReceivedPacket(trace, sizeRx, pPacketRx, pSizeTx, pPacketTx, IPV6, remArIndex, scope); |
andrewboyson | 11:c051adb70c5a | 91 | |
andrewboyson | 49:1a6336f2b3f9 | 92 | Ip6AddressCopy(pDstIp, pSrcIp); |
andrewboyson | 11:c051adb70c5a | 93 | |
andrewboyson | 59:e0e556c8bd46 | 94 | finalisePacket(TCP, action, scope, pPacketTx, *pSizeTx, pSrcIp, pDstIp); |
andrewboyson | 11:c051adb70c5a | 95 | |
andrewboyson | 11:c051adb70c5a | 96 | return action; |
andrewboyson | 11:c051adb70c5a | 97 | } |
andrewboyson | 11:c051adb70c5a | 98 | |
andrewboyson | 59:e0e556c8bd46 | 99 | int Udp6HandleReceivedPacket(void (*traceback)(void), int scope, void* pPacketRx, int sizeRx, void* pPacketTx, int* pSizeTx, char* pSrcIp, char* pDstIp) |
andrewboyson | 11:c051adb70c5a | 100 | { |
andrewboyson | 37:793b39683406 | 101 | pTraceBack = traceback; |
andrewboyson | 37:793b39683406 | 102 | tracePacketProtocol = UDP; |
andrewboyson | 59:e0e556c8bd46 | 103 | calculatedChecksum = calculateChecksum(UDP, pSrcIp, pDstIp, sizeRx, pPacketRx); |
andrewboyson | 59:e0e556c8bd46 | 104 | |
andrewboyson | 59:e0e556c8bd46 | 105 | int action = UdpHandleReceivedPacket(trace, sizeRx, pPacketRx, pSizeTx, pPacketTx); |
andrewboyson | 44:83ce5ace337b | 106 | |
andrewboyson | 49:1a6336f2b3f9 | 107 | Ip6AddressCopy(pDstIp, pSrcIp); |
andrewboyson | 11:c051adb70c5a | 108 | |
andrewboyson | 59:e0e556c8bd46 | 109 | finalisePacket(UDP, action, scope, pPacketTx, *pSizeTx, pSrcIp, pDstIp); |
andrewboyson | 11:c051adb70c5a | 110 | |
andrewboyson | 11:c051adb70c5a | 111 | return action; |
andrewboyson | 11:c051adb70c5a | 112 | } |
andrewboyson | 71:736a5747ade1 | 113 | int Tcp6PollForPacketToSend(void* pPacket, int* pSize, char* pSrcIp, char* pDstIp) |
andrewboyson | 74:c3756bfa960e | 114 | { |
andrewboyson | 74:c3756bfa960e | 115 | int remArIndex = -1; |
andrewboyson | 80:4ef1500fca1d | 116 | int locIpScope = SCOPE_LOCAL; |
andrewboyson | 80:4ef1500fca1d | 117 | int action = TcpPollForPacketToSend(pSize, pPacket, IPV6, &remArIndex, &locIpScope); |
andrewboyson | 74:c3756bfa960e | 118 | if (action && remArIndex >= 0) Ar6IndexToIp(remArIndex, pDstIp); |
andrewboyson | 71:736a5747ade1 | 119 | |
andrewboyson | 71:736a5747ade1 | 120 | |
andrewboyson | 80:4ef1500fca1d | 121 | finalisePacket(TCP, action, locIpScope, pPacket, *pSize, pSrcIp, pDstIp); |
andrewboyson | 71:736a5747ade1 | 122 | |
andrewboyson | 71:736a5747ade1 | 123 | return action; |
andrewboyson | 71:736a5747ade1 | 124 | |
andrewboyson | 71:736a5747ade1 | 125 | } |
andrewboyson | 11:c051adb70c5a | 126 | int Udp6PollForPacketToSend(void* pPacket, int* pSize, char* pSrcIp, char* pDstIp) |
andrewboyson | 11:c051adb70c5a | 127 | { |
andrewboyson | 11:c051adb70c5a | 128 | int action = UdpPollForPacketToSend(IPV6, pSize, pPacket); |
andrewboyson | 11:c051adb70c5a | 129 | |
andrewboyson | 44:83ce5ace337b | 130 | int scope = SCOPE_LOCAL; |
andrewboyson | 44:83ce5ace337b | 131 | |
andrewboyson | 44:83ce5ace337b | 132 | finalisePacket(UDP, action, scope, pPacket, *pSize, pSrcIp, pDstIp); |
andrewboyson | 11:c051adb70c5a | 133 | |
andrewboyson | 11:c051adb70c5a | 134 | return action; |
andrewboyson | 11:c051adb70c5a | 135 | |
andrewboyson | 11:c051adb70c5a | 136 | } |
andrewboyson | 11:c051adb70c5a | 137 |