341 lines
8.4 KiB
PHP
341 lines
8.4 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2012. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; PPPoE.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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struct PPPoE_frame
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VersionAndType db ?
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Code db ?
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SessionID dw ?
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Length dw ? ; Length of payload, does NOT include the length PPPoE header.
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Payload rb 0
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ends
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uglobal
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PPPoE_SID dw ?
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PPPoE_MAC dp ?
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endg
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;-----------------------------------------------------------------
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;
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; PPPoE_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 PPPoE_init {
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call PPPoE_stop_connection
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}
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;-----------------------------------------------------------------
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;
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; PPPoE discovery input
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;
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; Handler of received Ethernet packet with type = Discovery
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;
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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 PPP header in edx
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; size of PPP 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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PPPoE_discovery_input:
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DEBUGF 2,"PPPoE_discovery_input\n"
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; First, find open PPPoE socket
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mov eax, net_sockets
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.next_socket:
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mov eax, [eax + SOCKET.NextPtr]
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or eax, eax
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jz .dump
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cmp [eax + SOCKET.Domain], AF_PPP
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jne .next_socket
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cmp [eax + SOCKET.Protocol], PPP_PROTO_ETHERNET
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jne .next_socket
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; Now, send it to the this socket
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mov ecx, [esp + 4]
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mov esi, [esp]
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jmp SOCKET_input
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.dump:
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DEBUGF 1,'PPPoE_discovery_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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;--------------------------------------
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;
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; Send discovery packet
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;
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; IN: eax = socket pointer
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; ecx = number of bytes to send
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; esi = pointer to data
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;
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;--------------------------------------
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align 4
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PPPoE_discovery_output:
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DEBUGF 2,"PPPoE_discovery_output: socket=%x buffer=%x size=%d\n", eax, esi, ecx
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; RFC2516: An entire PADI packet (including the PPPoE header) MUST NOT
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; exceed 1484 octets.
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cmp ecx, 1484 + 14
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ja .bad
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; Check that device exists and is ethernet device
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mov ebx, [eax + SOCKET.device]
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cmp ebx, MAX_NET_DEVICES
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ja .bad
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mov ebx, [NET_DRV_LIST + 4*ebx]
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test ebx, ebx
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jz .bad
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cmp [ebx + NET_DEVICE.type], NET_TYPE_ETH
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jne .bad
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DEBUGF 2,"PPPoE_discovery_output: device=%x\n", ebx
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; Create packet.
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push ecx esi
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stdcall kernel_alloc, 1500
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pop esi ecx
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test eax, eax
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jz .bad
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mov edx, ecx
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mov edi, eax
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rep movsb
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cmp edx, 60 ; Min ETH size
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ja @f
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mov edx, 60
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@@:
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push edx eax ; size and packet ptr for driver send proc
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; Overwrite source MAC and protocol type
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lea edi, [eax + ETH_header.SrcMAC]
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lea esi, [ebx + ETH_DEVICE.mac]
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movsd
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movsw
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cmp word[edi], ETHER_PPP_SESSION ; Allow only PPP_discovery, or LCP
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je @f
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mov ax, ETHER_PPP_DISCOVERY
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stosw
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@@:
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; And send the packet
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call [ebx + NET_DEVICE.transmit]
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xor eax, eax
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ret
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.bad:
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or eax, -1
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ret
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;-----------------------------------------------------------------
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;
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; PPPoE session input
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;
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; Handler of received Ethernet packet with type = Session
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;
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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 PPP header in edx
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; size of PPP 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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PPPoE_session_input:
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cmp [edx + PPPoE_frame.VersionAndType], 0x11
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jne .dump
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cmp [edx + PPPoE_frame.Code], 0x00
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jne .dump
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movzx ecx, [edx + PPPoE_frame.Length]
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xchg cl, ch
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mov ax, [edx + PPPoE_frame.SessionID]
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DEBUGF 2,"PPPoE_input: session ID=%x, length=%u\n", ax, cx
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cmp ax, [PPPoE_SID]
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jne .dump
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mov ax, word [edx + PPPoE_frame.Payload]
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add edx, PPPoE_frame.Payload + 2
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cmp ax, PPP_IPv4
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je IPv4_input
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; cmp ax, PPP_IPv6
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; je IPv6_input
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jmp PPPoE_discovery_input ; Send LCP,CHAP,CBCP,... packets to the PPP dialer
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DEBUGF 2,"PPPoE_input: Unknown protocol=%x\n", ax
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.dump:
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DEBUGF 2,"PPPoE_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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;-----------------------------------------------------------------
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;
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; PPPoE_output
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;
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; IN:
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; ebx = device ptr
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; ecx = packet size
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;
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; di = protocol
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;
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; OUT: edi = 0 on error, pointer to buffer otherwise
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; eax = buffer start
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; ebx = to device structure
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; ecx = unchanged (packet size of embedded data)
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; edx = size of complete buffer
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;
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;-----------------------------------------------------------------
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align 4
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PPPoE_output:
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DEBUGF 1,"PPPoE_output: size=%u device=%x\n", ecx, ebx
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pushw di
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pushw [PPPoE_SID]
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lea eax, [ebx + ETH_DEVICE.mac]
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lea edx, [PPPoE_MAC]
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add ecx, PPPoE_frame.Payload + 2
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mov di, ETHER_PPP_SESSION
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call ETH_output
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jz .eth_error
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sub ecx, PPPoE_frame.Payload
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mov [edi + PPPoE_frame.VersionAndType], 0x11
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mov [edi + PPPoE_frame.Code], 0
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popw [edi + PPPoE_frame.SessionID]
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xchg cl, ch
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mov [edi + PPPoE_frame.Length], cx
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xchg cl, ch
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pop word [edi + PPPoE_frame.Payload]
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sub ecx, 2
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add edi, PPPoE_frame.Payload + 2
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DEBUGF 1,"PPPoE_output: success!\n"
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ret
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.eth_error:
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add esp, 4
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xor edi, edi
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ret
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PPPoE_start_connection:
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DEBUGF 2,"PPPoE_start_connection: %x\n", cx
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cmp [PPPoE_SID], 0
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jne .fail
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mov [PPPoE_SID], cx
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mov dword [PPPoE_MAC], edx
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mov word [PPPoE_MAC + 4], si
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xor eax, eax
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ret
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.fail:
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or eax, -1
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ret
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align 4
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PPPoE_stop_connection:
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DEBUGF 2,"PPPoE_stop_connection\n"
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xor eax, eax
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mov [PPPoE_SID], ax
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mov dword [PPPoE_MAC], eax
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mov word [PPPoE_MAC + 4], ax
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ret
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;---------------------------------------------------------------------------
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;
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; PPPoE 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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PPPoE_api:
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movzx eax, bh
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shl eax, 2
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and ebx, 0xff
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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 PPPoE_start_connection ; 0
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dd PPPoE_stop_connection ; 1
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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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