Modules/IPStack - Planning new ARP code

diff --git a/KernelLand/Modules/IPStack/arp.c b/KernelLand/Modules/IPStack/arp.c
index 2957eee..d1d50cd 100644 (file)
--- a/KernelLand/Modules/IPStack/arp.c
+++ b/KernelLand/Modules/IPStack/arp.c
@@ -16,6 +16,20 @@
 #define        ARP_CACHE_SIZE  128
 #define        ARP_MAX_AGE             (60*60*1000)    // 1Hr
 
+typedef struct sARP_CacheEnt
+{
+       void    *Layer3Addr;
+       tMacAddr        L2Addr;
+       Sint64  LastUpdate;
+       Sint64  LastUsed;
+} tARP_CacheEnt;
+typedef struct sARP_Cache
+{
+       size_t  AddrSize;
+        int    nCacheEnts;
+       tARP_CacheEnt   Cache[];
+} tARP_Cache;
+
 // === IMPORTS ===
 extern tInterface      *IPv4_GetInterface(tAdapter *Adapter, tIPv4 Address, int Broadcast);
 #if ARPv6
@@ -28,6 +42,7 @@ tMacAddr      ARP_Resolve4(tInterface *Interface, tIPv4 Address);
 void   ARP_int_GetPacket(tAdapter *Adapter, tMacAddr From, int Length, void *Buffer);
 
 // === GLOBALS ===
+ int   giARP_WaitingThreads;
 struct sARP_Cache4 {
        tIPv4   IP;
        tMacAddr        MAC;
@@ -37,7 +52,6 @@ struct sARP_Cache4 {
  int   giARP_Cache4Space;
 tMutex glARP_Cache4;
 tSemaphore     gARP_Cache4Semaphore;
- int   giARP_WaitingThreads;
 #if ARPv6
 struct sARP_Cache6 {
        tIPv6   IP;
@@ -50,6 +64,24 @@ tMutex       glARP_Cache6;
 #endif
 
 // === CODE ===
+tARP_Cache *ARP_int_CreateCache(unsigned int NumCacheEntries, size_t AddrSize)
+{
+       size_t  len = sizeof(tARP_Cache) + NumCacheEntries * (sizeof(tARP_CacheEnt) + AddrSize);
+       tARP_Cache      *ret = calloc(len, 1);
+       
+       ret->nCacheEnts = NumCacheEntries;
+       ret->AddrSize = AddrSize;
+       
+       char    *addr_storage_pos = (void*)&ret->Cache[NumCacheEntries];
+       
+       for( int i = 0; i < NumCacheEntries; i ++ )
+       {
+               ret->Cache[i].Layer3Addr = addr_storage_pos;
+               addr_storage_pos += AddrSize;
+       }
+       
+       return ret;
+}
 /**
  * \fn int ARP_Initialise()
  * \brief Initalise the ARP section
@@ -71,6 +103,22 @@ int ARP_Initialise()
        return 1;
 }
 
+tMacAddr ARP_Resolve(tInterface *Interface, void *Address)
+{
+       switch(Interface->Type)
+       {
+       case AF_INET4:
+               return ARP_Resolve4(Interface, *(tIPv4*)Address);
+//     case AF_INET6:
+//             ret = ARP_int_CacheLookup(Interface, 16, Address);
+//             if(ret == cMAC_ZERO) {
+//                     // TODO: Send ICMPv6 ND requests
+//             }
+//             return ret;
+       }
+       return cMAC_ZERO;
+}
+
 /**
  * \brief Resolves a MAC address from an IPv4 address
  */