Andrew Boyson / net

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/icmp/ndp/ra.c@119:8e1a7805b801, 2019-01-29 (annotated)

Committer:
andrewboyson
Date:
Tue Jan 29 15:07:14 2019 +0000
Revision:
119:8e1a7805b801
Parent:
101:a677d8aee6dd
Child:
137:cf6e7db0e985
Updated NDP module to backoff its requests in not successful.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 61:aad055f1b0d1 1 #include <stdint.h>
andrewboyson 61:aad055f1b0d1 2 #include <stdbool.h>
andrewboyson 61:aad055f1b0d1 3
andrewboyson 46:40d33e9037e4 4 #include "log.h"
andrewboyson 101:a677d8aee6dd 5 #include "clk.h"
andrewboyson 46:40d33e9037e4 6 #include "net.h"
andrewboyson 46:40d33e9037e4 7 #include "action.h"
andrewboyson 46:40d33e9037e4 8 #include "ip6.h"
andrewboyson 46:40d33e9037e4 9 #include "mac.h"
andrewboyson 46:40d33e9037e4 10 #include "slaac.h"
andrewboyson 46:40d33e9037e4 11 #include "ndp.h"
andrewboyson 46:40d33e9037e4 12
andrewboyson 46:40d33e9037e4 13 bool RaTrace = false;
andrewboyson 46:40d33e9037e4 14
andrewboyson 46:40d33e9037e4 15 __packed struct header
andrewboyson 46:40d33e9037e4 16 {
andrewboyson 46:40d33e9037e4 17 uint8_t hop;
andrewboyson 46:40d33e9037e4 18 uint8_t mo;
andrewboyson 46:40d33e9037e4 19 uint16_t lifetime;
andrewboyson 46:40d33e9037e4 20 uint32_t reachable;
andrewboyson 46:40d33e9037e4 21 uint32_t retrans;
andrewboyson 46:40d33e9037e4 22 };
andrewboyson 47:73af5c0b0dc2 23 void logHeader(struct header* pHeader, char* pData, int dataLength)
andrewboyson 46:40d33e9037e4 24 {
andrewboyson 46:40d33e9037e4 25 if (NetTraceVerbose)
andrewboyson 46:40d33e9037e4 26 {
andrewboyson 46:40d33e9037e4 27 Log("RA header\r\n");
andrewboyson 46:40d33e9037e4 28 LogF(" Hop limit %d\r\n", pHeader->hop);
andrewboyson 46:40d33e9037e4 29 LogF(" M O %x\r\n", pHeader->mo);
andrewboyson 46:40d33e9037e4 30 LogF(" Lifetime %d\r\n", NetToHost16(pHeader->lifetime));
andrewboyson 46:40d33e9037e4 31 LogF(" Reachable %d\r\n", NetToHost32(pHeader->reachable));
andrewboyson 46:40d33e9037e4 32 LogF(" Retrans %d\r\n", NetToHost32(pHeader->retrans));
andrewboyson 47:73af5c0b0dc2 33 NdpLogOptionsVerbose(pData, dataLength);
andrewboyson 46:40d33e9037e4 34 }
andrewboyson 46:40d33e9037e4 35 else
andrewboyson 46:40d33e9037e4 36 {
andrewboyson 47:73af5c0b0dc2 37 Log("RA header");
andrewboyson 47:73af5c0b0dc2 38 NdpLogOptionsQuiet(pData, dataLength);
andrewboyson 47:73af5c0b0dc2 39 Log("\r\n");
andrewboyson 46:40d33e9037e4 40 }
andrewboyson 46:40d33e9037e4 41 }
andrewboyson 46:40d33e9037e4 42 int RaHandleReceivedAdvertisement(void (*traceback)(void), void* pPacket, int* pSize)
andrewboyson 46:40d33e9037e4 43 {
andrewboyson 61:aad055f1b0d1 44 struct header* pHeader = (struct header*)pPacket;
andrewboyson 46:40d33e9037e4 45 char* pData = (char*)pHeader + sizeof(struct header);
andrewboyson 46:40d33e9037e4 46 int dataLength = *pSize - sizeof(struct header);
andrewboyson 46:40d33e9037e4 47
andrewboyson 47:73af5c0b0dc2 48 NdpHopLimit = pHeader->hop;
andrewboyson 47:73af5c0b0dc2 49 NdpManagedConfiguration = pHeader->mo & 0x80;
andrewboyson 47:73af5c0b0dc2 50 NdpOtherConfiguration = pHeader->mo & 0x40;
andrewboyson 119:8e1a7805b801 51 NdpSetLease (NetToHost16(pHeader->lifetime)); //This resets the NdpElapsedTimer
andrewboyson 46:40d33e9037e4 52
andrewboyson 46:40d33e9037e4 53 if (RaTrace)
andrewboyson 46:40d33e9037e4 54 {
andrewboyson 46:40d33e9037e4 55 if (NetTraceNewLine) Log("\r\n");
andrewboyson 46:40d33e9037e4 56 LogTimeF("NDP received router advertise\r\n");
andrewboyson 46:40d33e9037e4 57 if (NetTraceStack) traceback();
andrewboyson 47:73af5c0b0dc2 58 logHeader(pHeader, pData, dataLength);
andrewboyson 46:40d33e9037e4 59 }
andrewboyson 47:73af5c0b0dc2 60 NdpDecodeOptions(pData, dataLength, NdpRouterMac, NULL);
andrewboyson 46:40d33e9037e4 61
andrewboyson 46:40d33e9037e4 62 return DO_NOTHING;
andrewboyson 46:40d33e9037e4 63
andrewboyson 46:40d33e9037e4 64 }