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@73:43e3d7fb3d60, 2018-10-23 (annotated)
- Committer:
- andrewboyson
- Date:
- Tue Oct 23 06:46:50 2018 +0000
- Revision:
- 73:43e3d7fb3d60
- Parent:
- 71:736a5747ade1
- Child:
- 74:c3756bfa960e
Separated the TCP header into its own 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 <string.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 "eth.h" |
andrewboyson | 37:793b39683406 | 8 | #include "dhcp.h" |
andrewboyson | 37:793b39683406 | 9 | #include "ns.h" |
andrewboyson | 37:793b39683406 | 10 | #include "ip.h" |
andrewboyson | 49:1a6336f2b3f9 | 11 | #include "ip6addr.h" |
andrewboyson | 37:793b39683406 | 12 | #include "slaac.h" |
andrewboyson | 37:793b39683406 | 13 | #include "tcp.h" |
andrewboyson | 37:793b39683406 | 14 | #include "udp.h" |
andrewboyson | 73:43e3d7fb3d60 | 15 | #include "tcphdr.h" |
andrewboyson | 11:c051adb70c5a | 16 | |
andrewboyson | 11:c051adb70c5a | 17 | static uint16_t calculateChecksum(uint8_t pro, char* pSrcIp, char* pDstIp, int size, void* pPacket) |
andrewboyson | 11:c051adb70c5a | 18 | { |
andrewboyson | 11:c051adb70c5a | 19 | __packed struct pseudo |
andrewboyson | 11:c051adb70c5a | 20 | { |
andrewboyson | 11:c051adb70c5a | 21 | char src[16]; |
andrewboyson | 11:c051adb70c5a | 22 | char dst[16]; |
andrewboyson | 11:c051adb70c5a | 23 | uint8_t zer; |
andrewboyson | 11:c051adb70c5a | 24 | uint8_t pro; |
andrewboyson | 11:c051adb70c5a | 25 | uint16_t len; |
andrewboyson | 11:c051adb70c5a | 26 | } pseudo; |
andrewboyson | 11:c051adb70c5a | 27 | |
andrewboyson | 11:c051adb70c5a | 28 | memcpy(pseudo.src, pSrcIp, 16); |
andrewboyson | 11:c051adb70c5a | 29 | memcpy(pseudo.dst, pDstIp, 16); |
andrewboyson | 11:c051adb70c5a | 30 | pseudo.zer = 0; |
andrewboyson | 11:c051adb70c5a | 31 | pseudo.pro = pro; |
andrewboyson | 11:c051adb70c5a | 32 | pseudo.len = NetToHost16(size); |
andrewboyson | 11:c051adb70c5a | 33 | |
andrewboyson | 11:c051adb70c5a | 34 | return NetCheckSumTwo(sizeof(pseudo), &pseudo, size, pPacket); |
andrewboyson | 11:c051adb70c5a | 35 | } |
andrewboyson | 44:83ce5ace337b | 36 | static void finalisePacket(uint8_t pro, int action, int scope, void* pPacket, int size, char* pSrcIp, char* pDstIp) |
andrewboyson | 11:c051adb70c5a | 37 | { |
andrewboyson | 11:c051adb70c5a | 38 | if (!action) return; |
andrewboyson | 11:c051adb70c5a | 39 | |
andrewboyson | 49:1a6336f2b3f9 | 40 | Ip6AddressFromDest (ActionGetDestPart(action), pDstIp); |
andrewboyson | 49:1a6336f2b3f9 | 41 | SlaacAddressFromScope(scope, pSrcIp); |
andrewboyson | 44:83ce5ace337b | 42 | |
andrewboyson | 11:c051adb70c5a | 43 | switch (pro) |
andrewboyson | 11:c051adb70c5a | 44 | { |
andrewboyson | 73:43e3d7fb3d60 | 45 | case TCP: TcpHdrWrite(size, pPacket); break; |
andrewboyson | 11:c051adb70c5a | 46 | case UDP: UdpMakeHeader(size, pPacket); break; |
andrewboyson | 11:c051adb70c5a | 47 | } |
andrewboyson | 61:aad055f1b0d1 | 48 | |
andrewboyson | 11:c051adb70c5a | 49 | uint16_t checksum = calculateChecksum(pro, pSrcIp, pDstIp, size, pPacket); |
andrewboyson | 11:c051adb70c5a | 50 | |
andrewboyson | 11:c051adb70c5a | 51 | switch (pro) |
andrewboyson | 11:c051adb70c5a | 52 | { |
andrewboyson | 73:43e3d7fb3d60 | 53 | case TCP: TcpHdrAddChecksum(pPacket, checksum); break; |
andrewboyson | 11:c051adb70c5a | 54 | case UDP: UdpAddChecksum(pPacket, checksum); break; |
andrewboyson | 11:c051adb70c5a | 55 | } |
andrewboyson | 11:c051adb70c5a | 56 | |
andrewboyson | 37:793b39683406 | 57 | if (ActionGetTracePart(action)) |
andrewboyson | 11:c051adb70c5a | 58 | { |
andrewboyson | 37:793b39683406 | 59 | switch (pro) |
andrewboyson | 37:793b39683406 | 60 | { |
andrewboyson | 73:43e3d7fb3d60 | 61 | case TCP: TcpHdrLog(0); break; |
andrewboyson | 56:35117a8b5c65 | 62 | case UDP: UdpLogHeader(0); break; |
andrewboyson | 37:793b39683406 | 63 | } |
andrewboyson | 37:793b39683406 | 64 | } |
andrewboyson | 37:793b39683406 | 65 | } |
andrewboyson | 37:793b39683406 | 66 | static void (*pTraceBack)(void); |
andrewboyson | 37:793b39683406 | 67 | static int tracePacketProtocol; |
andrewboyson | 37:793b39683406 | 68 | static uint16_t calculatedChecksum; |
andrewboyson | 37:793b39683406 | 69 | static void trace() |
andrewboyson | 37:793b39683406 | 70 | { |
andrewboyson | 37:793b39683406 | 71 | pTraceBack(); |
andrewboyson | 37:793b39683406 | 72 | switch(tracePacketProtocol) |
andrewboyson | 37:793b39683406 | 73 | { |
andrewboyson | 56:35117a8b5c65 | 74 | case UDP: UdpLogHeader(calculatedChecksum); break; |
andrewboyson | 73:43e3d7fb3d60 | 75 | case TCP: TcpHdrLog(calculatedChecksum); break; |
andrewboyson | 37:793b39683406 | 76 | default: LogTimeF("UdpTcp6 - traceback unrecognised protocol %d\r\n", tracePacketProtocol); break; |
andrewboyson | 11:c051adb70c5a | 77 | } |
andrewboyson | 11:c051adb70c5a | 78 | } |
andrewboyson | 11:c051adb70c5a | 79 | |
andrewboyson | 71:736a5747ade1 | 80 | int Tcp6HandleReceivedPacket(void (*traceback)(void), int scope, void* pPacketRx, int sizeRx, void* pPacketTx, int* pSizeTx, char* pSrcIp, char* pDstIp, char* pCachedRemIp) |
andrewboyson | 11:c051adb70c5a | 81 | { |
andrewboyson | 37:793b39683406 | 82 | pTraceBack = traceback; |
andrewboyson | 37:793b39683406 | 83 | tracePacketProtocol = TCP; |
andrewboyson | 59:e0e556c8bd46 | 84 | calculatedChecksum = calculateChecksum(TCP, pSrcIp, pDstIp, sizeRx, pPacketRx); |
andrewboyson | 11:c051adb70c5a | 85 | |
andrewboyson | 71:736a5747ade1 | 86 | int action = TcpHandleReceivedPacket(trace, sizeRx, pPacketRx, pSizeTx, pPacketTx, IPV6, pCachedRemIp); |
andrewboyson | 11:c051adb70c5a | 87 | |
andrewboyson | 49:1a6336f2b3f9 | 88 | Ip6AddressCopy(pDstIp, pSrcIp); |
andrewboyson | 11:c051adb70c5a | 89 | |
andrewboyson | 59:e0e556c8bd46 | 90 | finalisePacket(TCP, action, scope, pPacketTx, *pSizeTx, pSrcIp, pDstIp); |
andrewboyson | 11:c051adb70c5a | 91 | |
andrewboyson | 11:c051adb70c5a | 92 | return action; |
andrewboyson | 11:c051adb70c5a | 93 | } |
andrewboyson | 11:c051adb70c5a | 94 | |
andrewboyson | 59:e0e556c8bd46 | 95 | int Udp6HandleReceivedPacket(void (*traceback)(void), int scope, void* pPacketRx, int sizeRx, void* pPacketTx, int* pSizeTx, char* pSrcIp, char* pDstIp) |
andrewboyson | 11:c051adb70c5a | 96 | { |
andrewboyson | 37:793b39683406 | 97 | pTraceBack = traceback; |
andrewboyson | 37:793b39683406 | 98 | tracePacketProtocol = UDP; |
andrewboyson | 59:e0e556c8bd46 | 99 | calculatedChecksum = calculateChecksum(UDP, pSrcIp, pDstIp, sizeRx, pPacketRx); |
andrewboyson | 59:e0e556c8bd46 | 100 | |
andrewboyson | 59:e0e556c8bd46 | 101 | int action = UdpHandleReceivedPacket(trace, sizeRx, pPacketRx, pSizeTx, pPacketTx); |
andrewboyson | 44:83ce5ace337b | 102 | |
andrewboyson | 49:1a6336f2b3f9 | 103 | Ip6AddressCopy(pDstIp, pSrcIp); |
andrewboyson | 11:c051adb70c5a | 104 | |
andrewboyson | 59:e0e556c8bd46 | 105 | finalisePacket(UDP, action, scope, pPacketTx, *pSizeTx, pSrcIp, pDstIp); |
andrewboyson | 11:c051adb70c5a | 106 | |
andrewboyson | 11:c051adb70c5a | 107 | return action; |
andrewboyson | 11:c051adb70c5a | 108 | } |
andrewboyson | 71:736a5747ade1 | 109 | int Tcp6PollForPacketToSend(void* pPacket, int* pSize, char* pSrcIp, char* pDstIp) |
andrewboyson | 71:736a5747ade1 | 110 | { |
andrewboyson | 71:736a5747ade1 | 111 | int action = TcpPollForPacketToSend(pSize, pPacket, IPV6, pDstIp); |
andrewboyson | 71:736a5747ade1 | 112 | |
andrewboyson | 71:736a5747ade1 | 113 | int scope = SCOPE_LOCAL; |
andrewboyson | 71:736a5747ade1 | 114 | |
andrewboyson | 71:736a5747ade1 | 115 | finalisePacket(TCP, action, scope, pPacket, *pSize, pSrcIp, pDstIp); |
andrewboyson | 71:736a5747ade1 | 116 | |
andrewboyson | 71:736a5747ade1 | 117 | return action; |
andrewboyson | 71:736a5747ade1 | 118 | |
andrewboyson | 71:736a5747ade1 | 119 | } |
andrewboyson | 11:c051adb70c5a | 120 | int Udp6PollForPacketToSend(void* pPacket, int* pSize, char* pSrcIp, char* pDstIp) |
andrewboyson | 11:c051adb70c5a | 121 | { |
andrewboyson | 11:c051adb70c5a | 122 | int action = UdpPollForPacketToSend(IPV6, pSize, pPacket); |
andrewboyson | 11:c051adb70c5a | 123 | |
andrewboyson | 44:83ce5ace337b | 124 | int scope = SCOPE_LOCAL; |
andrewboyson | 44:83ce5ace337b | 125 | |
andrewboyson | 44:83ce5ace337b | 126 | finalisePacket(UDP, action, scope, pPacket, *pSize, pSrcIp, pDstIp); |
andrewboyson | 11:c051adb70c5a | 127 | |
andrewboyson | 11:c051adb70c5a | 128 | return action; |
andrewboyson | 11:c051adb70c5a | 129 | |
andrewboyson | 11:c051adb70c5a | 130 | } |
andrewboyson | 11:c051adb70c5a | 131 |