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
eth/eth.cpp@14:e75a59c1123d, 2017-05-05 (annotated)
- Committer:
- andrewboyson
- Date:
- Fri May 05 17:44:16 2017 +0000
- Revision:
- 14:e75a59c1123d
- Parent:
- 13:9cd54f7db57a
- Child:
- 16:f416ef583c89
Made IP addresses and ports available to debug messages
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
andrewboyson | 10:f0854784e960 | 1 | #include "mbed.h" |
andrewboyson | 10:f0854784e960 | 2 | #include "io.h" |
andrewboyson | 10:f0854784e960 | 3 | #include "log.h" |
andrewboyson | 10:f0854784e960 | 4 | #include "net.h" |
andrewboyson | 10:f0854784e960 | 5 | #include "arp.h" |
andrewboyson | 10:f0854784e960 | 6 | #include "ip4.h" |
andrewboyson | 10:f0854784e960 | 7 | #include "ip6.h" |
andrewboyson | 10:f0854784e960 | 8 | #include "phy.h" |
andrewboyson | 10:f0854784e960 | 9 | #include "eth.h" |
andrewboyson | 13:9cd54f7db57a | 10 | #include "mac.h" |
andrewboyson | 10:f0854784e960 | 11 | |
andrewboyson | 10:f0854784e960 | 12 | #define HEADER_SIZE 14 |
andrewboyson | 13:9cd54f7db57a | 13 | |
andrewboyson | 13:9cd54f7db57a | 14 | #define DEBUG false |
andrewboyson | 13:9cd54f7db57a | 15 | |
andrewboyson | 10:f0854784e960 | 16 | __packed struct header |
andrewboyson | 10:f0854784e960 | 17 | { |
andrewboyson | 10:f0854784e960 | 18 | char dst[6]; |
andrewboyson | 10:f0854784e960 | 19 | char src[6]; |
andrewboyson | 10:f0854784e960 | 20 | uint16_t typ; |
andrewboyson | 10:f0854784e960 | 21 | }; |
andrewboyson | 10:f0854784e960 | 22 | |
andrewboyson | 14:e75a59c1123d | 23 | uint16_t EthProtocol; |
andrewboyson | 14:e75a59c1123d | 24 | |
andrewboyson | 14:e75a59c1123d | 25 | void EthProtocolToString(uint16_t prototype, int size, char* text) |
andrewboyson | 10:f0854784e960 | 26 | { |
andrewboyson | 14:e75a59c1123d | 27 | switch (prototype) |
andrewboyson | 10:f0854784e960 | 28 | { |
andrewboyson | 10:f0854784e960 | 29 | case ARP: strncpy (text, "ARP" , size); break; |
andrewboyson | 10:f0854784e960 | 30 | case IPV4: strncpy (text, "IPV4", size); break; |
andrewboyson | 10:f0854784e960 | 31 | case IPV6: strncpy (text, "IPV6", size); break; |
andrewboyson | 14:e75a59c1123d | 32 | default: snprintf(text, size, "%04hX", prototype); break; |
andrewboyson | 10:f0854784e960 | 33 | } |
andrewboyson | 10:f0854784e960 | 34 | } |
andrewboyson | 10:f0854784e960 | 35 | |
andrewboyson | 14:e75a59c1123d | 36 | static void finalisePacket(int action, int dataLength, void* pPacket, int* pSize) |
andrewboyson | 10:f0854784e960 | 37 | { |
andrewboyson | 14:e75a59c1123d | 38 | if (!action) return; |
andrewboyson | 14:e75a59c1123d | 39 | |
andrewboyson | 10:f0854784e960 | 40 | struct header * pHeader = (header*)pPacket; |
andrewboyson | 14:e75a59c1123d | 41 | |
andrewboyson | 14:e75a59c1123d | 42 | MacMake(action, EthProtocol, pHeader->dst); |
andrewboyson | 10:f0854784e960 | 43 | |
andrewboyson | 13:9cd54f7db57a | 44 | memcpy(pHeader->src, MacLocal, 6); //Put our MAC into the source |
andrewboyson | 14:e75a59c1123d | 45 | pHeader->typ = NetToHost16(EthProtocol); |
andrewboyson | 10:f0854784e960 | 46 | |
andrewboyson | 10:f0854784e960 | 47 | *pSize = HEADER_SIZE + dataLength; |
andrewboyson | 10:f0854784e960 | 48 | } |
andrewboyson | 13:9cd54f7db57a | 49 | void LogHeader(struct header* pHeader, char* title) |
andrewboyson | 13:9cd54f7db57a | 50 | { |
andrewboyson | 13:9cd54f7db57a | 51 | char text[20]; |
andrewboyson | 13:9cd54f7db57a | 52 | LogTimeF("ETH %s\r\n", title); |
andrewboyson | 14:e75a59c1123d | 53 | MacToString(pHeader->dst, sizeof(text), text); |
andrewboyson | 13:9cd54f7db57a | 54 | LogTimeF("Destination: %s\r\n", text); |
andrewboyson | 14:e75a59c1123d | 55 | MacToString(pHeader->src, sizeof(text), text); |
andrewboyson | 13:9cd54f7db57a | 56 | LogTimeF("Source: %s\r\n", text); |
andrewboyson | 14:e75a59c1123d | 57 | EthProtocolToString(NetToHost16(pHeader->typ), sizeof(text), text); |
andrewboyson | 13:9cd54f7db57a | 58 | LogTimeF("EtherType: %s\r\n", text); |
andrewboyson | 13:9cd54f7db57a | 59 | } |
andrewboyson | 10:f0854784e960 | 60 | int EthHandlePacket(void* pPacket, int* pSize) |
andrewboyson | 10:f0854784e960 | 61 | { |
andrewboyson | 10:f0854784e960 | 62 | struct header * pHeader = (header*)pPacket; |
andrewboyson | 10:f0854784e960 | 63 | int dataLength = *pSize - HEADER_SIZE; |
andrewboyson | 10:f0854784e960 | 64 | void* pData = (char*)pPacket + HEADER_SIZE; |
andrewboyson | 14:e75a59c1123d | 65 | |
andrewboyson | 14:e75a59c1123d | 66 | if (!MacAccept(pHeader->dst)) return DO_NOTHING; |
andrewboyson | 13:9cd54f7db57a | 67 | |
andrewboyson | 13:9cd54f7db57a | 68 | if (DEBUG) LogHeader(pHeader, "received packet"); |
andrewboyson | 10:f0854784e960 | 69 | |
andrewboyson | 14:e75a59c1123d | 70 | EthProtocol = NetToHost16(pHeader->typ); |
andrewboyson | 14:e75a59c1123d | 71 | if (EthProtocol < 1500) return DO_NOTHING; //drop 802.3 messages |
andrewboyson | 10:f0854784e960 | 72 | |
andrewboyson | 10:f0854784e960 | 73 | int action = DO_NOTHING; |
andrewboyson | 14:e75a59c1123d | 74 | switch (EthProtocol) |
andrewboyson | 10:f0854784e960 | 75 | { |
andrewboyson | 10:f0854784e960 | 76 | case ARP: action = ArpHandleReceivedPacket(pHeader->src, pData, &dataLength, pHeader->dst); break; |
andrewboyson | 10:f0854784e960 | 77 | case IPV4: action = Ip4HandleReceivedPacket(pHeader->src, pData, &dataLength, pHeader->dst); break; |
andrewboyson | 10:f0854784e960 | 78 | case IPV6: action = Ip6HandleReceivedPacket(pHeader->src, pData, &dataLength, pHeader->dst); break; |
andrewboyson | 10:f0854784e960 | 79 | default: |
andrewboyson | 13:9cd54f7db57a | 80 | LogHeader(pHeader, "packet not handled"); |
andrewboyson | 10:f0854784e960 | 81 | break; |
andrewboyson | 10:f0854784e960 | 82 | } |
andrewboyson | 10:f0854784e960 | 83 | |
andrewboyson | 14:e75a59c1123d | 84 | finalisePacket(action, dataLength, pPacket, pSize); |
andrewboyson | 10:f0854784e960 | 85 | return action; |
andrewboyson | 10:f0854784e960 | 86 | } |
andrewboyson | 10:f0854784e960 | 87 | int EthPollForPacketToSend(void* pPacket, int* pSize) |
andrewboyson | 10:f0854784e960 | 88 | { |
andrewboyson | 10:f0854784e960 | 89 | struct header * pHeader = (header*)pPacket; |
andrewboyson | 10:f0854784e960 | 90 | void* pData = (char*)pPacket + HEADER_SIZE; |
andrewboyson | 10:f0854784e960 | 91 | |
andrewboyson | 10:f0854784e960 | 92 | int dataLength = 0; |
andrewboyson | 14:e75a59c1123d | 93 | EthProtocol = 0; |
andrewboyson | 10:f0854784e960 | 94 | int action = DO_NOTHING; |
andrewboyson | 10:f0854784e960 | 95 | |
andrewboyson | 10:f0854784e960 | 96 | if (action == DO_NOTHING) |
andrewboyson | 10:f0854784e960 | 97 | { |
andrewboyson | 10:f0854784e960 | 98 | action = Ip6PollForPacketToSend(pData, &dataLength, pHeader->dst); |
andrewboyson | 14:e75a59c1123d | 99 | EthProtocol = IPV6; |
andrewboyson | 10:f0854784e960 | 100 | } |
andrewboyson | 10:f0854784e960 | 101 | |
andrewboyson | 10:f0854784e960 | 102 | if (action == DO_NOTHING) |
andrewboyson | 10:f0854784e960 | 103 | { |
andrewboyson | 10:f0854784e960 | 104 | action = Ip4PollForPacketToSend(pData, &dataLength, pHeader->dst); |
andrewboyson | 14:e75a59c1123d | 105 | EthProtocol = IPV4; |
andrewboyson | 10:f0854784e960 | 106 | } |
andrewboyson | 10:f0854784e960 | 107 | |
andrewboyson | 14:e75a59c1123d | 108 | finalisePacket(action, dataLength, pPacket, pSize); |
andrewboyson | 10:f0854784e960 | 109 | |
andrewboyson | 13:9cd54f7db57a | 110 | if (DEBUG) LogHeader(pHeader, "sent packet"); |
andrewboyson | 13:9cd54f7db57a | 111 | |
andrewboyson | 10:f0854784e960 | 112 | return action; |
andrewboyson | 10:f0854784e960 | 113 | } |
andrewboyson | 10:f0854784e960 | 114 |