#define VALIDATE_CHECKSUM 0
#define MAX_PACKET_SIZE 2048
+// === TYPES ===
+typedef struct {
+ Uint16 Type;
+ tPacketCallback Callback;
+} tLink_PktType;
+
+
// === PROTOTYPES ===
void Link_RegisterType(Uint16 Type, tPacketCallback Callback);
void Link_SendPacket(tAdapter *Adapter, Uint16 Type, tMacAddr To, tIPStackBuffer *Buffer);
// === GLOBALS ===
int giRegisteredTypes = 0;
int giRegisteredTypeSpace = 0;
-struct {
- Uint16 Type;
- tPacketCallback Callback;
-} *gaRegisteredTypes;
+tLink_PktType *gaRegisteredTypes;
int gbLink_CRCTableGenerated = 0;
Uint32 gaiLink_CRCTable[256];
*/
void Link_RegisterType(Uint16 Type, tPacketCallback Callback)
{
- int i;
- void *tmp;
+ tLink_PktType *typeslot = NULL;
- for( i = giRegisteredTypes; i -- ; )
+ for( int i = 0; i < giRegisteredTypes; i ++)
{
if(gaRegisteredTypes[i].Type == Type) {
Log_Warning("Net Link", "Attempt to register 0x%x twice", Type);
return ;
}
// Ooh! Free slot!
- if(gaRegisteredTypes[i].Callback == NULL) break;
+ if(gaRegisteredTypes[i].Callback == NULL)
+ {
+ typeslot = &gaRegisteredTypes[i];
+ break;
+ }
}
- if(i == -1)
+ if(typeslot == NULL)
{
- giRegisteredTypeSpace += 5;
- tmp = realloc(gaRegisteredTypes, giRegisteredTypeSpace*sizeof(*gaRegisteredTypes));
- if(!tmp) {
- Log_Warning("Net Link",
- "Out of heap space! (Attempted to allocate %i)",
- giRegisteredTypeSpace*sizeof(*gaRegisteredTypes)
- );
- return ;
+ if( giRegisteredTypes == giRegisteredTypeSpace )
+ {
+ giRegisteredTypeSpace += 5;
+ void *tmp = realloc(gaRegisteredTypes, giRegisteredTypeSpace*sizeof(tLink_PktType));
+ if(!tmp) {
+ Log_Warning("Net Link",
+ "Out of heap space! (Attempted to allocate %i)",
+ giRegisteredTypeSpace*sizeof(tLink_PktType)
+ );
+ return ;
+ }
+ gaRegisteredTypes = tmp;
}
- gaRegisteredTypes = tmp;
- i = giRegisteredTypes;
- giRegisteredTypes ++;
+ typeslot = &gaRegisteredTypes[giRegisteredTypes++];
}
- gaRegisteredTypes[i].Callback = Callback;
- gaRegisteredTypes[i].Type = Type;
+ typeslot->Callback = Callback;
+ typeslot->Type = Type;
}
/**
- * \fn void Link_SendPacket(tAdapter *Adapter, Uint16 Type, tMacAddr To, int Length, void *Buffer)
* \brief Formats and sends a packet on the specified interface
*/
void Link_SendPacket(tAdapter *Adapter, Uint16 Type, tMacAddr To, tIPStackBuffer *Buffer)
#if LINK_LOGPACKETS
Log_Log("Net Link",
- "Packet from %02x:%02x:%02x:%02x:%02x:%02x"
+ "eth%i Packet from %02x:%02x:%02x:%02x:%02x:%02x"
" to %02x:%02x:%02x:%02x:%02x:%02x (Type=%04x)",
+ Adapter->Index,
hdr->Src.B[0], hdr->Src.B[1], hdr->Src.B[2],
hdr->Src.B[3], hdr->Src.B[4], hdr->Src.B[5],
hdr->Dest.B[0], hdr->Dest.B[1], hdr->Dest.B[2],
// TODO: Check checksum
#endif
+ Uint16 type = ntohs(hdr->Type);
// Check if there is a registered callback for this packet type
- int i;
- for( i = giRegisteredTypes; i--; )
+ for( int i = giRegisteredTypes; i--; )
{
- if(gaRegisteredTypes[i].Type == ntohs(hdr->Type)) break;
+ if(gaRegisteredTypes[i].Type == type)
+ {
+ // Call the callback
+ gaRegisteredTypes[i].Callback(
+ Adapter,
+ hdr->Src,
+ len - sizeof(tEthernetHeader),
+ hdr->Data
+ );
+ free(data);
+ return 0;
+ }
}
// No? Ignore it
- if( i == -1 ) {
- Log_Log("Net Link", "Unregistered type 0x%x", ntohs(hdr->Type));
-
- free(data);
- return 1;
- }
-
- // Call the callback
- gaRegisteredTypes[i].Callback(
- Adapter,
- hdr->Src,
- len - sizeof(tEthernetHeader),
- hdr->Data
- );
-
- free(data);
+ Log_Log("Net Link", "eth%i Unregistered type 0x%04x", Adapter->Index, type);
- return 0;
+ free(data);
+ return 1;
}
// From http://www.cl.cam.ac.uk/research/srg/bluebook/21/crc/node6.html