2014-01-08 05:03:52 +01:00
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2012-2013. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; IPv6.INC ;;
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;; ;;
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;; Part of the tcp/ip network stack for KolibriOS ;;
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;; ;;
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;; Written by hidnplayr@kolibrios.org ;;
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;; ;;
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;; GNU GENERAL PUBLIC LICENSE ;;
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;; Version 2, June 1991 ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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2014-09-12 21:16:32 +02:00
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$Revision: 4850 $
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2014-01-08 05:03:52 +01:00
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struct IPv6_header
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VersionTrafficFlow dd ? ; Version[0-3], Traffic class[4-11], Flow Label [12-31]
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PayloadLength dw ? ; 16 bits, unsigned length of payload (extension headers are part of this)
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NextHeader db ? ; Values are same as in IPv4 'Protocol' field
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HopLimit db ? ; Decremented by every node, packet is discarded when it reaches 0
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SourceAddress rd 4 ; 128-bit addresses
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DestinationAddress rd 4 ;
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Payload rb 0
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ends
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uglobal
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align 4
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IPv6:
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.addresses rd 4*NET_DEVICES_MAX
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.subnet rd 4*NET_DEVICES_MAX
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.dns rd 4*NET_DEVICES_MAX
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.gateway rd 4*NET_DEVICES_MAX
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.packets_tx rd NET_DEVICES_MAX
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.packets_rx rd NET_DEVICES_MAX
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endg
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;-----------------------------------------------------------------
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;
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; IPv6_init
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;
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; This function resets all IP variables
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;
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;-----------------------------------------------------------------
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macro IPv6_init {
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xor eax, eax
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mov edi, IPv6
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mov ecx, (4*4*4+2*4)MAX_IP
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rep stosd
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}
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;-----------------------------------------------------------------
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;
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; IPv6_input:
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;
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; Will check if IPv6 Packet isnt damaged
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; and call appropriate handler. (TCP/UDP/ICMP/..)
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;
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; It will also re-construct fragmented packets
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;
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; IN: Pointer to buffer in [esp]
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; size of buffer in [esp+4]
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; pointer to device struct in ebx
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; pointer to IPv6 header in edx
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; size of IPv6 packet in ecx
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; OUT: /
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;
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;-----------------------------------------------------------------
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align 4
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IPv6_input:
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DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input from: %x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%x%x\n",\
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[edx + IPv6_header.SourceAddress + 0]:2,[edx + IPv6_header.SourceAddress + 1]:2,\
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[edx + IPv6_header.SourceAddress + 2]:2,[edx + IPv6_header.SourceAddress + 3]:2,\
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[edx + IPv6_header.SourceAddress + 4]:2,[edx + IPv6_header.SourceAddress + 5]:2,\
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[edx + IPv6_header.SourceAddress + 6]:2,[edx + IPv6_header.SourceAddress + 7]:2,\
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[edx + IPv6_header.SourceAddress + 8]:2,[edx + IPv6_header.SourceAddress + 9]:2,\
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[edx + IPv6_header.SourceAddress + 10]:2,[edx + IPv6_header.SourceAddress + 11]:2,\
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[edx + IPv6_header.SourceAddress + 12]:2,[edx + IPv6_header.SourceAddress + 13]:2,\
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[edx + IPv6_header.SourceAddress + 14]:2,[edx + IPv6_header.SourceAddress + 15]:2
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DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input to: %x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%x%x\n",\
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[edx + IPv6_header.DestinationAddress + 0]:2,[edx + IPv6_header.DestinationAddress + 1]:2,\
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[edx + IPv6_header.DestinationAddress + 2]:2,[edx + IPv6_header.DestinationAddress + 3]:2,\
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[edx + IPv6_header.DestinationAddress + 4]:2,[edx + IPv6_header.DestinationAddress + 5]:2,\
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[edx + IPv6_header.DestinationAddress + 6]:2,[edx + IPv6_header.DestinationAddress + 7]:2,\
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[edx + IPv6_header.DestinationAddress + 8]:2,[edx + IPv6_header.DestinationAddress + 9]:2,\
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[edx + IPv6_header.DestinationAddress + 10]:2,[edx + IPv6_header.DestinationAddress + 11]:2,\
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[edx + IPv6_header.DestinationAddress + 12]:2,[edx + IPv6_header.DestinationAddress + 13]:2,\
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[edx + IPv6_header.DestinationAddress + 14]:2,[edx + IPv6_header.DestinationAddress + 15]:2
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sub ecx, sizeof.IPv6_header
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jb .dump
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cmp cx, [edx + IPv6_header.PayloadLength]
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jb .dump
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;-------------------------------------------------------------------
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; No, it's just a regular IP packet, pass it to the higher protocols
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.handle_it:
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movzx ecx, [edx + IPv6_header.PayloadLength]
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lea edi, [edx + IPv6_header.SourceAddress] ; make edi ptr to source and dest IPv6 address
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lea esi, [edx + IPv6_header.Payload] ; make esi ptr to data
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mov al, [edx + IPv6_header.NextHeader]
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.scan:
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cmp al, 59 ; no next
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je .dump
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cmp al, 0
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je .hop_by_hop
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cmp al, 43
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je .routing
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cmp al, 44
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je .fragment
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cmp al, 60
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je .dest_opts
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; cmp al, IP_PROTO_TCP
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; je TCP_input
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; cmp al, IP_PROTO_UDP
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; je UDP_input
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; cmp al, 58
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; je ICMP6_input
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DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - unknown protocol: %u\n", al
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.dump:
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DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - dumping\n"
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call kernel_free
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add esp, 4
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ret
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.dump_options:
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add esp, 2+4+4
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jmp .dump
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.nextheader:
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pop esi
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pop ecx
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pop ax
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jmp .scan
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;-------------------------
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; Hop-by-Hop
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.hop_by_hop:
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DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - hop by hop\n"
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pushw [esi] ; 8 bit identifier for option type
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movzx eax, byte[esi + 1] ; Hdr Ext Len
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inc eax ; first 8 octets not counted
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shl eax, 3 ; * 8
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sub ecx, eax
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push ecx
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add eax, esi
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push eax
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inc esi
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inc esi
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mov al, [esi]
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cmp al, 0
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je .pad_1
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cmp al, 1
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je .pad_n
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; TODO: check with other known options
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; unknown option.. discard packet or not?
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; check highest two bits
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test al, 0xc0 ; discard packet
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jnz .dump_options
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.pad_n:
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movzx eax, byte[esi + 1]
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DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - pad %u\n", eax
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inc esi
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inc esi
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add esi, eax
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sub ecx, eax
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jmp .hop_by_hop
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.pad_1:
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DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - pad 1\n"
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inc esi
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dec ecx
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jmp .hop_by_hop
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.dest_opts:
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DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - dest opts\n"
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jmp .nextheader
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.routing:
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DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - routing\n"
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pushw [esi] ; 8 bit identifier for option type
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movzx eax, byte[esi + 1] ; Hdr Ext Len
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inc eax ; first 8 octets not counted
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shl eax, 3 ; * 8
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sub ecx, eax
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push ecx
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add eax, esi
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push eax
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inc esi
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inc esi
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cmp al, 0
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je .pad_1
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cmp al, 1
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je .pad_n
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mov al, [esi] ; routing type
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jmp .nextheader
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.fragment:
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DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - fragment\n"
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jmp .nextheader
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;---------------------------------------------------------------------------
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;
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; IPv6_API
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;
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; This function is called by system function 75
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;
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; IN: subfunction number in bl
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; device number in bh
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; ecx, edx, .. depends on subfunction
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;
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; OUT:
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;
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;---------------------------------------------------------------------------
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align 4
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IPv6_api:
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movzx eax, bh
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shl eax, 2
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and ebx, 0x000000ff
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cmp ebx, .number
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ja .error
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jmp dword [.table + 4*ebx]
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.table:
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dd .packets_tx ; 0
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dd .packets_rx ; 1
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; dd .read_ip ; 2
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; dd .write_ip ; 3
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; dd .read_dns ; 4
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; dd .write_dns ; 5
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; dd .read_subnet ; 6
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; dd .write_subnet ; 7
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; dd .read_gateway ; 8
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; dd .write_gateway ; 9
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.number = ($ - .table) / 4 - 1
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.error:
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mov eax, -1
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ret
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.packets_tx:
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mov eax, [IPv6.packets_tx + eax]
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ret
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.packets_rx:
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mov eax, [IPv6.packets_rx + eax]
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ret
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