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ip6/icmp/ndp/ns.cpp@53:77f8a49adf89, 2017-11-09 (annotated)

Committer:
andrewboyson
Date:
Thu Nov 09 15:44:29 2017 +0000
Revision:
53:77f8a49adf89
Parent:
52:fbc5a46b5e16
Child:
59:e0e556c8bd46
Set hop and ttl equal to 255 for on-link and to 64 or NdpHopLimit (64) for off-link.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 45:3dd57903ec99 1 #include "mbed.h"
andrewboyson 45:3dd57903ec99 2 #include "log.h"
andrewboyson 45:3dd57903ec99 3 #include "net.h"
andrewboyson 45:3dd57903ec99 4 #include "action.h"
andrewboyson 49:1a6336f2b3f9 5 #include "ip6addr.h"
andrewboyson 45:3dd57903ec99 6 #include "mac.h"
andrewboyson 50:492f2d2954e4 7 #include "nr6.h"
andrewboyson 48:952dddb74b8b 8 #include "ar6.h"
andrewboyson 45:3dd57903ec99 9 #include "ip6.h"
andrewboyson 45:3dd57903ec99 10 #include "slaac.h"
andrewboyson 47:73af5c0b0dc2 11 #include "ndp.h"
andrewboyson 45:3dd57903ec99 12
andrewboyson 45:3dd57903ec99 13 bool NsTraceRecvSol = false;
andrewboyson 45:3dd57903ec99 14 bool NsTraceRecvAdv = false;
andrewboyson 45:3dd57903ec99 15 bool NsTraceSendSol = false;
andrewboyson 45:3dd57903ec99 16
andrewboyson 45:3dd57903ec99 17 char NsAddressToResolve[16];
andrewboyson 45:3dd57903ec99 18 bool NsResolveRequestFlag = false;
andrewboyson 45:3dd57903ec99 19
andrewboyson 47:73af5c0b0dc2 20 __packed struct header
andrewboyson 45:3dd57903ec99 21 {
andrewboyson 47:73af5c0b0dc2 22 uint32_t reserved;
andrewboyson 47:73af5c0b0dc2 23 char target[16];
andrewboyson 47:73af5c0b0dc2 24 };
andrewboyson 48:952dddb74b8b 25 static struct header * pHeader;
andrewboyson 48:952dddb74b8b 26 static int size;
andrewboyson 45:3dd57903ec99 27
andrewboyson 48:952dddb74b8b 28 static void logHeader()
andrewboyson 45:3dd57903ec99 29 {
andrewboyson 45:3dd57903ec99 30 char* pData = (char*)pHeader + sizeof(struct header);
andrewboyson 47:73af5c0b0dc2 31 int dataLength = size - sizeof(struct header);
andrewboyson 45:3dd57903ec99 32
andrewboyson 47:73af5c0b0dc2 33 if (NetTraceVerbose)
andrewboyson 45:3dd57903ec99 34 {
andrewboyson 47:73af5c0b0dc2 35 Log("NS header\r\n");
andrewboyson 47:73af5c0b0dc2 36 LogF(" Size %d\r\n", size);
andrewboyson 47:73af5c0b0dc2 37 LogF(" Target "); Ip6AddressLog(pHeader->target); Log("\r\n");
andrewboyson 47:73af5c0b0dc2 38 NdpLogOptionsVerbose(pData, dataLength);
andrewboyson 45:3dd57903ec99 39 }
andrewboyson 47:73af5c0b0dc2 40 else
andrewboyson 47:73af5c0b0dc2 41 {
andrewboyson 47:73af5c0b0dc2 42 Log("NS header ");
andrewboyson 47:73af5c0b0dc2 43 Ip6AddressLog(pHeader->target);
andrewboyson 47:73af5c0b0dc2 44 NdpLogOptionsQuiet(pData, dataLength);
andrewboyson 47:73af5c0b0dc2 45 Log("\r\n");
andrewboyson 47:73af5c0b0dc2 46 }
andrewboyson 45:3dd57903ec99 47 }
andrewboyson 48:952dddb74b8b 48 static void (*pTraceBack)(void);
andrewboyson 48:952dddb74b8b 49 static void trace()
andrewboyson 48:952dddb74b8b 50 {
andrewboyson 48:952dddb74b8b 51 pTraceBack();
andrewboyson 48:952dddb74b8b 52 logHeader();
andrewboyson 48:952dddb74b8b 53 }
andrewboyson 45:3dd57903ec99 54 int NsHandleReceivedSolicitation(void (*traceback)(void), void* pPacket, int* pSize, uint8_t* pType, uint8_t* pCode)
andrewboyson 45:3dd57903ec99 55 {
andrewboyson 48:952dddb74b8b 56 pTraceBack = traceback;
andrewboyson 48:952dddb74b8b 57 pHeader = (header*)pPacket;
andrewboyson 48:952dddb74b8b 58 size = *pSize;
andrewboyson 45:3dd57903ec99 59 char* pData = (char*)pHeader + sizeof(struct header);
andrewboyson 45:3dd57903ec99 60
andrewboyson 45:3dd57903ec99 61 //Check it is us
andrewboyson 45:3dd57903ec99 62 if (!SlaacScope(pHeader->target)) return DO_NOTHING;
andrewboyson 45:3dd57903ec99 63
andrewboyson 45:3dd57903ec99 64 if (NsTraceRecvSol)
andrewboyson 45:3dd57903ec99 65 {
andrewboyson 45:3dd57903ec99 66 if (NetTraceNewLine) Log("\r\n");
andrewboyson 45:3dd57903ec99 67 LogTimeF("NDP received neighbour solicit\r\n");
andrewboyson 45:3dd57903ec99 68 if (NetTraceStack) traceback();
andrewboyson 48:952dddb74b8b 69 logHeader();
andrewboyson 45:3dd57903ec99 70 }
andrewboyson 45:3dd57903ec99 71
andrewboyson 45:3dd57903ec99 72 //Send advertisement
andrewboyson 45:3dd57903ec99 73 *pType = 136;
andrewboyson 45:3dd57903ec99 74 *pCode = 0;
andrewboyson 45:3dd57903ec99 75 pHeader->reserved = 0x00000060; //R=0 (not a router); S=1 (solicited); O=1 (override)
andrewboyson 45:3dd57903ec99 76 //pHeader->target is unchanged
andrewboyson 45:3dd57903ec99 77
andrewboyson 47:73af5c0b0dc2 78 //Add target MAC
andrewboyson 47:73af5c0b0dc2 79 char* p = pData;
andrewboyson 47:73af5c0b0dc2 80 p += NdpAddOptionTargetMac(p, MacLocal);
andrewboyson 45:3dd57903ec99 81
andrewboyson 48:952dddb74b8b 82 size = sizeof(struct header) + p - pData;
andrewboyson 52:fbc5a46b5e16 83 *pSize = size;
andrewboyson 45:3dd57903ec99 84
andrewboyson 48:952dddb74b8b 85 if (NsTraceRecvSol) logHeader();
andrewboyson 45:3dd57903ec99 86
andrewboyson 45:3dd57903ec99 87 return ActionMakeFromDestAndTrace(UNICAST, NsTraceRecvSol && NetTraceStack);
andrewboyson 45:3dd57903ec99 88
andrewboyson 45:3dd57903ec99 89 }
andrewboyson 45:3dd57903ec99 90 int NsHandleReceivedAdvertisement(void (*traceback)(void), void* pPacket, int* pSize)
andrewboyson 45:3dd57903ec99 91 {
andrewboyson 48:952dddb74b8b 92 pTraceBack = traceback;
andrewboyson 48:952dddb74b8b 93 pHeader = (header*)pPacket;
andrewboyson 48:952dddb74b8b 94 size = *pSize;
andrewboyson 45:3dd57903ec99 95 char* pData = (char*)pHeader + sizeof(struct header);
andrewboyson 48:952dddb74b8b 96 int dataLength = size - sizeof(struct header);
andrewboyson 45:3dd57903ec99 97
andrewboyson 45:3dd57903ec99 98 if (NsTraceRecvAdv)
andrewboyson 45:3dd57903ec99 99 {
andrewboyson 45:3dd57903ec99 100 if (NetTraceNewLine) Log("\r\n");
andrewboyson 45:3dd57903ec99 101 LogTimeF("NDP received neighbour advertise\r\n");
andrewboyson 45:3dd57903ec99 102 if (NetTraceStack) traceback();
andrewboyson 48:952dddb74b8b 103 logHeader();
andrewboyson 45:3dd57903ec99 104 }
andrewboyson 45:3dd57903ec99 105
andrewboyson 47:73af5c0b0dc2 106 char tgtMac[6];
andrewboyson 47:73af5c0b0dc2 107 NdpDecodeOptions(pData, dataLength, NULL, tgtMac);
andrewboyson 45:3dd57903ec99 108
andrewboyson 48:952dddb74b8b 109 Ar6AddIpRecord(trace, tgtMac, pHeader->target);
andrewboyson 50:492f2d2954e4 110 Nr6MakeRequestForNameFromIp(pHeader->target);
andrewboyson 45:3dd57903ec99 111
andrewboyson 45:3dd57903ec99 112 return DO_NOTHING;
andrewboyson 45:3dd57903ec99 113 }
andrewboyson 45:3dd57903ec99 114
andrewboyson 45:3dd57903ec99 115 int NsGetWaitingSolicitation(void* pPacket, int* pSize, uint8_t* pType, uint8_t* pCode)
andrewboyson 45:3dd57903ec99 116 {
andrewboyson 45:3dd57903ec99 117 if (!NsResolveRequestFlag) return DO_NOTHING;
andrewboyson 46:40d33e9037e4 118 NsResolveRequestFlag = false;
andrewboyson 45:3dd57903ec99 119
andrewboyson 45:3dd57903ec99 120 *pType = 135; //Neighbour solicitation
andrewboyson 45:3dd57903ec99 121 *pCode = 0;
andrewboyson 47:73af5c0b0dc2 122
andrewboyson 48:952dddb74b8b 123 pHeader = (header*)pPacket;
andrewboyson 48:952dddb74b8b 124 size = *pSize;
andrewboyson 47:73af5c0b0dc2 125 pHeader->reserved = 0;
andrewboyson 49:1a6336f2b3f9 126 Ip6AddressCopy(pHeader->target, NsAddressToResolve);
andrewboyson 45:3dd57903ec99 127
andrewboyson 45:3dd57903ec99 128 char* pData = (char*)pHeader + sizeof(struct header);
andrewboyson 45:3dd57903ec99 129 char* p = pData;
andrewboyson 47:73af5c0b0dc2 130 p += NdpAddOptionSourceMac(p, MacLocal);
andrewboyson 45:3dd57903ec99 131
andrewboyson 48:952dddb74b8b 132 size = sizeof(struct header) + p - pData;
andrewboyson 53:77f8a49adf89 133 *pSize = size;
andrewboyson 45:3dd57903ec99 134
andrewboyson 45:3dd57903ec99 135 if (NsTraceSendSol)
andrewboyson 45:3dd57903ec99 136 {
andrewboyson 45:3dd57903ec99 137 if (NetTraceNewLine) Log("\r\n");
andrewboyson 45:3dd57903ec99 138 LogTimeF("NDP sent neighbour solicit\r\n");
andrewboyson 48:952dddb74b8b 139 logHeader();
andrewboyson 45:3dd57903ec99 140 }
andrewboyson 45:3dd57903ec99 141
andrewboyson 45:3dd57903ec99 142 return ActionMakeFromDestAndTrace(MULTICAST_NODE, NsTraceSendSol && NetTraceStack);
andrewboyson 45:3dd57903ec99 143
andrewboyson 45:3dd57903ec99 144 }