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;;          GNU GENERAL PUBLIC LICENSE                             ;;
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;;          GNU GENERAL PUBLIC LICENSE                             ;;
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;;             Version 2, June 1991                                ;;
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;;             Version 2, June 1991                                ;;
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;;                                                                 ;;
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;;                                                                 ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 1251 $
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$Revision: 1254 $
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	push	edx ebx
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	push	edx ebx
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	; save checksum, and clear it in original packet
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	mov	di , [edx + IPv4_Packet.HeaderChecksum]
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	; save checksum, and clear it in original packet
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	DEBUGF	1,"checksum: %x\n",di
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	mov	di , [edx + IPv4_Packet.HeaderChecksum]
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	mov	word [edx + IPv4_Packet.HeaderChecksum], 0
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	mov	word [edx + IPv4_Packet.HeaderChecksum], 0
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	; now compare the two..
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	; now compare the two..
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	cmp	dx, di
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	cmp	dx, di
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	pop	ebx edx
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	pop	ebx edx
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	jne	.dump						; if checksum isn't valid then dump packet
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	jne	.dump						; if checksum isn't valid then dump packet
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	DEBUGF	1,"IPv4 Checksum is correct\n",di
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	mov	eax, [edx + IPv4_Packet.DestinationAddress]
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	mov	eax, [edx + IPv4_Packet.DestinationAddress]
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	mov	edi, BROADCAST
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	mov	edi, BROADCAST
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	mov	ecx, MAX_IP+1
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	mov	ecx, MAX_IP+1
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	repnz	scasd
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	repnz	scasd
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	jmp	.dump
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	jmp	.dump
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  .ip_ok:
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  .ip_ok:
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	call	ETH_struc2dev					; TODO: make this work on other protocols too!
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	call	ETH_struc2dev					; TODO: make this work on other protocols too!
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	inc	[IP_PACKETS_RX+4*edi]
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	inc	[IP_PACKETS_RX+4*edi]
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	DEBUGF	1,"IP_Handler - packet from %u.%u.%u.%u\n",\
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	DEBUGF	1,"packet comes from %u.%u.%u.%u\n",\
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	[edx + IPv4_Packet.SourceAddress]:1,[edx + IPv4_Packet.SourceAddress + 1]:1,[edx + IPv4_Packet.SourceAddress + 2]:1,[edx + IPv4_Packet.SourceAddress + 3]:1
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	[edx + IPv4_Packet.SourceAddress]:1,[edx + IPv4_Packet.SourceAddress + 1]:1,[edx + IPv4_Packet.SourceAddress + 2]:1,[edx + IPv4_Packet.SourceAddress + 3]:1
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	mov	al , [edx + IPv4_Packet.VersionAndIHL]
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	mov	al , [edx + IPv4_Packet.VersionAndIHL]
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	sub	ecx, eax					;
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	sub	ecx, eax					;
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	add	eax, edx
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	add	eax, edx
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	push	eax
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	push	eax
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	mov	al , [edx + IPv4_Packet.Protocol]
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;----------------------- experimental
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	mov	al , [edx + IPv4_Packet.Protocol]
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	mov	esi, [edx + IPv4_Packet.SourceAddress]
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	mov	esi, [edx + IPv4_Packet.SourceAddress]
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	mov	edi, [edx + IPv4_Packet.DestinationAddress]
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;-----------------------
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	mov	edi, [edx + IPv4_Packet.DestinationAddress]
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	pop	edx						; Offset to data (tcp/udp/icmp/.. Packet)
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	pop	edx						; Offset to data (tcp/udp/icmp/.. Packet)
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	je	UDP_handler
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	je	UDP_handler
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	cmp	al , IP_PROTO_ICMP
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	cmp	al , IP_PROTO_ICMP
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	je	ICMP_handler
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	je	ICMP_handler
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	DEBUGF	1,"IP_Handler - unknown protocol:%u\n",al
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	DEBUGF	1,"unknown protocol: %u\n",al
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  .dump:
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  .dump:
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	add	eax, edx
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	add	eax, edx
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	push	eax
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	mov	al , [edx + IPv4_Packet.Protocol]
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	push	eax
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;----------------------- experimental
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	mov	al , [edx + IPv4_Packet.Protocol]
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	mov	esi, [edx + IPv4_Packet.SourceAddress]
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	mov	edi, [edx + IPv4_Packet.DestinationAddress]
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	mov	esi, [edx + IPv4_Packet.SourceAddress]
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;-----------------------
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	mov	edi, [edx + IPv4_Packet.DestinationAddress]
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	pop	edx						; Offset to data (tcp/udp/icmp/.. Packet)
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	pop	edx						; Offset to data (tcp/udp/icmp/.. Packet)