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.cpp@11:c051adb70c5a, 2017-04-18 (annotated)
- Committer:
- andrewboyson
- Date:
- Tue Apr 18 19:07:05 2017 +0000
- Revision:
- 11:c051adb70c5a
- Child:
- 14:e75a59c1123d
Tidied IPv6 code
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
andrewboyson | 11:c051adb70c5a | 1 | #include "mbed.h" |
andrewboyson | 11:c051adb70c5a | 2 | #include "log.h" |
andrewboyson | 11:c051adb70c5a | 3 | #include "net.h" |
andrewboyson | 11:c051adb70c5a | 4 | #include "dhcp.h" |
andrewboyson | 11:c051adb70c5a | 5 | #include "ndp.h" |
andrewboyson | 11:c051adb70c5a | 6 | #include "ip6.h" |
andrewboyson | 11:c051adb70c5a | 7 | #include "slaac.h" |
andrewboyson | 11:c051adb70c5a | 8 | #include "tcp.h" |
andrewboyson | 11:c051adb70c5a | 9 | #include "udp.h" |
andrewboyson | 11:c051adb70c5a | 10 | |
andrewboyson | 11:c051adb70c5a | 11 | #define DEBUG false |
andrewboyson | 11:c051adb70c5a | 12 | |
andrewboyson | 11:c051adb70c5a | 13 | static uint16_t calculateChecksum(uint8_t pro, char* pSrcIp, char* pDstIp, int size, void* pPacket) |
andrewboyson | 11:c051adb70c5a | 14 | { |
andrewboyson | 11:c051adb70c5a | 15 | __packed struct pseudo |
andrewboyson | 11:c051adb70c5a | 16 | { |
andrewboyson | 11:c051adb70c5a | 17 | char src[16]; |
andrewboyson | 11:c051adb70c5a | 18 | char dst[16]; |
andrewboyson | 11:c051adb70c5a | 19 | uint8_t zer; |
andrewboyson | 11:c051adb70c5a | 20 | uint8_t pro; |
andrewboyson | 11:c051adb70c5a | 21 | uint16_t len; |
andrewboyson | 11:c051adb70c5a | 22 | } pseudo; |
andrewboyson | 11:c051adb70c5a | 23 | |
andrewboyson | 11:c051adb70c5a | 24 | memcpy(pseudo.src, pSrcIp, 16); |
andrewboyson | 11:c051adb70c5a | 25 | memcpy(pseudo.dst, pDstIp, 16); |
andrewboyson | 11:c051adb70c5a | 26 | pseudo.zer = 0; |
andrewboyson | 11:c051adb70c5a | 27 | pseudo.pro = pro; |
andrewboyson | 11:c051adb70c5a | 28 | pseudo.len = NetToHost16(size); |
andrewboyson | 11:c051adb70c5a | 29 | |
andrewboyson | 11:c051adb70c5a | 30 | return NetCheckSumTwo(sizeof(pseudo), &pseudo, size, pPacket); |
andrewboyson | 11:c051adb70c5a | 31 | } |
andrewboyson | 11:c051adb70c5a | 32 | |
andrewboyson | 11:c051adb70c5a | 33 | |
andrewboyson | 11:c051adb70c5a | 34 | static void finalisePacket(uint8_t pro, int action, void* pPacket, int size, char* pSrcIp, char* pDstIp) |
andrewboyson | 11:c051adb70c5a | 35 | { |
andrewboyson | 11:c051adb70c5a | 36 | if (!action) return; |
andrewboyson | 11:c051adb70c5a | 37 | |
andrewboyson | 11:c051adb70c5a | 38 | Ip6DestIpFromAction(action, pDstIp); |
andrewboyson | 11:c051adb70c5a | 39 | |
andrewboyson | 11:c051adb70c5a | 40 | memcpy(pSrcIp, SlaacLinkLocalIp, 16); |
andrewboyson | 11:c051adb70c5a | 41 | |
andrewboyson | 11:c051adb70c5a | 42 | switch (pro) |
andrewboyson | 11:c051adb70c5a | 43 | { |
andrewboyson | 11:c051adb70c5a | 44 | case TCP: TcpMakeHeader(size, pPacket); break; |
andrewboyson | 11:c051adb70c5a | 45 | case UDP: UdpMakeHeader(size, pPacket); break; |
andrewboyson | 11:c051adb70c5a | 46 | } |
andrewboyson | 11:c051adb70c5a | 47 | uint16_t checksum = calculateChecksum(pro, pSrcIp, pDstIp, size, pPacket); |
andrewboyson | 11:c051adb70c5a | 48 | |
andrewboyson | 11:c051adb70c5a | 49 | switch (pro) |
andrewboyson | 11:c051adb70c5a | 50 | { |
andrewboyson | 11:c051adb70c5a | 51 | case TCP: TcpAddChecksum(pPacket, checksum); break; |
andrewboyson | 11:c051adb70c5a | 52 | case UDP: UdpAddChecksum(pPacket, checksum); break; |
andrewboyson | 11:c051adb70c5a | 53 | } |
andrewboyson | 11:c051adb70c5a | 54 | |
andrewboyson | 11:c051adb70c5a | 55 | switch (pro) |
andrewboyson | 11:c051adb70c5a | 56 | { |
andrewboyson | 11:c051adb70c5a | 57 | case TCP: if (DEBUG) TcpLogHeader("IPv6 packet sent", pPacket, 0); break; |
andrewboyson | 11:c051adb70c5a | 58 | case UDP: if (DEBUG) UdpLogHeader("IPv6 packet sent", pPacket, 0); break; |
andrewboyson | 11:c051adb70c5a | 59 | } |
andrewboyson | 11:c051adb70c5a | 60 | } |
andrewboyson | 11:c051adb70c5a | 61 | |
andrewboyson | 11:c051adb70c5a | 62 | int Tcp6HandleReceivedPacket(char* pSrcIp, char* pDstIp, int *pSize, void * pPacket) |
andrewboyson | 11:c051adb70c5a | 63 | { |
andrewboyson | 11:c051adb70c5a | 64 | uint16_t calculatedChecksum = calculateChecksum(TCP, pSrcIp, pDstIp, *pSize, pPacket); |
andrewboyson | 11:c051adb70c5a | 65 | if (DEBUG) TcpLogHeader("IPv6 packet received", pPacket, calculatedChecksum); |
andrewboyson | 11:c051adb70c5a | 66 | |
andrewboyson | 11:c051adb70c5a | 67 | TcpReadHeader(pPacket, *pSize); |
andrewboyson | 11:c051adb70c5a | 68 | |
andrewboyson | 11:c051adb70c5a | 69 | int action = TcpHandleReceivedPacket(pSize, pPacket); |
andrewboyson | 11:c051adb70c5a | 70 | |
andrewboyson | 11:c051adb70c5a | 71 | memcpy(pDstIp, pSrcIp, 16); |
andrewboyson | 11:c051adb70c5a | 72 | |
andrewboyson | 11:c051adb70c5a | 73 | finalisePacket(TCP, action, pPacket, *pSize, pSrcIp, pDstIp); |
andrewboyson | 11:c051adb70c5a | 74 | |
andrewboyson | 11:c051adb70c5a | 75 | return action; |
andrewboyson | 11:c051adb70c5a | 76 | } |
andrewboyson | 11:c051adb70c5a | 77 | |
andrewboyson | 11:c051adb70c5a | 78 | int Udp6HandleReceivedPacket(char* pSrcIp, char* pDstIp, int *pSize, void * pPacket) |
andrewboyson | 11:c051adb70c5a | 79 | { |
andrewboyson | 11:c051adb70c5a | 80 | uint16_t calculatedChecksum = calculateChecksum(UDP, pSrcIp, pDstIp, *pSize, pPacket); |
andrewboyson | 11:c051adb70c5a | 81 | if (DEBUG) UdpLogHeader("IPv6 packet received", pPacket, calculatedChecksum); |
andrewboyson | 11:c051adb70c5a | 82 | |
andrewboyson | 11:c051adb70c5a | 83 | UdpReadHeader(pPacket, *pSize); |
andrewboyson | 11:c051adb70c5a | 84 | |
andrewboyson | 11:c051adb70c5a | 85 | int action = UdpHandleReceivedPacket(pSize, pPacket); |
andrewboyson | 11:c051adb70c5a | 86 | |
andrewboyson | 11:c051adb70c5a | 87 | memcpy(pDstIp, pSrcIp, 16); |
andrewboyson | 11:c051adb70c5a | 88 | |
andrewboyson | 11:c051adb70c5a | 89 | finalisePacket(UDP, action, pPacket, *pSize, pSrcIp, pDstIp); |
andrewboyson | 11:c051adb70c5a | 90 | |
andrewboyson | 11:c051adb70c5a | 91 | return action; |
andrewboyson | 11:c051adb70c5a | 92 | } |
andrewboyson | 11:c051adb70c5a | 93 | int Udp6PollForPacketToSend(void* pPacket, int* pSize, char* pSrcIp, char* pDstIp) |
andrewboyson | 11:c051adb70c5a | 94 | { |
andrewboyson | 11:c051adb70c5a | 95 | int action = UdpPollForPacketToSend(IPV6, pSize, pPacket); |
andrewboyson | 11:c051adb70c5a | 96 | |
andrewboyson | 11:c051adb70c5a | 97 | finalisePacket(UDP, action, pPacket, *pSize, pSrcIp, pDstIp); |
andrewboyson | 11:c051adb70c5a | 98 | |
andrewboyson | 11:c051adb70c5a | 99 | return action; |
andrewboyson | 11:c051adb70c5a | 100 | |
andrewboyson | 11:c051adb70c5a | 101 | } |
andrewboyson | 11:c051adb70c5a | 102 |