forked from KolibriOS/kolibrios
347 lines
11 KiB
PHP
347 lines
11 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2021. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; ETHERNET.INC ;;
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;; ;;
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;; Ethernet network layer 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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$Revision$
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ETH_FRAME_MINIMUM = 60
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ETH_QUEUE_SIZE = 255
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struct ETH_header
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DstMAC dp ? ; destination MAC-address
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SrcMAC dp ? ; source MAC-address
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Type dw ? ; type of the upper-layer protocol
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ends
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struct ETH_DEVICE NET_DEVICE
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mac dp ?
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ends
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iglobal
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align 4
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ETH_BROADCAST dp 0xffffffffffff
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ETH_frame_queued dd 0 ; Number of queued frames
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ETH_frame_head dd ETH_frame_head ; Pointer to next frame in the linked list
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ETH_frame_tail dd ETH_frame_head ; Pointer to last frame in the linked list
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endg
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uglobal
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align 4
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ETH_input_event dd ?
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endg
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macro eth_init {
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movi ebx, 1
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mov ecx, eth_process_input
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call new_sys_threads
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test eax, eax
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jns @f
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DEBUGF DEBUG_NETWORK_ERROR,'K : cannot create kernel thread for ethernet, error %d\n', eax
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@@:
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}
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;-----------------------------------------------------------------;
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; ;
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; eth_input: This function is called by ethernet drivers. ;
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; Push the received ethernet packet onto the ethernet input queue.;
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; ;
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; IN: [esp] = Pointer to buffer ;
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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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eth_input:
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pop eax
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if defined NETWORK_SANITY_CHECKS
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cmp eax, [net_buffs_low]
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jb .assert_mbuff
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cmp eax, [net_buffs_high]
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ja .assert_mbuff
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test eax, 0x7ff
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jnz .assert_mbuff
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end if
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spin_lock_irqsave
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cmp [ETH_frame_queued], ETH_QUEUE_SIZE
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jae .full
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inc [ETH_frame_queued]
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; Add frame to the end of the linked list
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mov [eax + NET_BUFF.NextPtr], ETH_frame_head
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mov ebx, [ETH_frame_tail]
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mov [eax + NET_BUFF.PrevPtr], ebx
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mov [ETH_frame_tail], eax
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mov [ebx + NET_BUFF.NextPtr], eax
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spin_unlock_irqrestore
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; Mark it as being an Ethernet Frame
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mov [eax + NET_BUFF.type], NET_BUFF_ETH
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; Now queue an event to process it
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xor edx, edx
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mov eax, [ETH_input_event]
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mov ebx, [eax + EVENT.id]
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xor esi, esi
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call raise_event
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ret
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.full:
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mov ebx, [eax + NET_BUFF.device]
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inc [ebx + NET_DEVICE.packets_rx_ovr]
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DEBUGF DEBUG_NETWORK_VERBOSE, "ETH incoming queue is full, discarding packet!\n"
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spin_unlock_irqrestore
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stdcall net_buff_free, eax
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ret
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if defined NETWORK_SANITY_CHECKS
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.assert_mbuff:
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DEBUGF DEBUG_NETWORK_ERROR, "eth_input: invalid buffer 0x%x\n", eax
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DEBUGF DEBUG_NETWORK_ERROR, "eth_input: caller=0x%x\n", [esp+4]
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xor eax, eax
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ret
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end if
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;-----------------------------------------------------------------;
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; ;
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; eth_process_input: Process packets from ethernet input queue. ;
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; ;
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; IN: / ;
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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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eth_process_input:
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xor esi, esi
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mov ecx, MANUAL_DESTROY
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call create_event
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mov [ETH_input_event], eax
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pushf
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.wait:
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popf
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mov eax, [ETH_input_event]
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mov ebx, [eax + EVENT.id]
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call wait_event
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.loop:
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pushf
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cli
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cmp [ETH_frame_queued], 0
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je .wait
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dec [ETH_frame_queued]
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mov esi, [ETH_frame_head]
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mov ebx, [esi + NET_BUFF.NextPtr]
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mov [ETH_frame_head], ebx
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mov [ebx + NET_BUFF.PrevPtr], ETH_frame_head
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popf
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mov eax, [esi + NET_BUFF.offset]
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add eax, esi
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mov ecx, [esi + NET_BUFF.length]
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mov ebx, [esi + NET_BUFF.device]
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pushd .loop ; return address for protocol handler
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push esi ; keep pointer to NET_BUFF on stack
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DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: size=%u\n", ecx
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sub ecx, sizeof.ETH_header
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jb .err
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; Set registers for protocol handlers
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lea edx, [eax + sizeof.ETH_header]
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mov ax, [eax + ETH_header.Type]
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; Place protocol handlers here
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cmp ax, ETHER_PROTO_IPv4
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je ipv4_input
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cmp ax, ETHER_PROTO_ARP
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je arp_input
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; cmp ax, ETHER_PROTO_IPv6
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; je ipv6_input
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; cmp ax, ETHER_PROTO_PPP_DISCOVERY
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; je pppoe_discovery_input
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; cmp ax, ETHER_PROTO_PPP_SESSION
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; je pppoe_session_input
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DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: Unknown packet type=%x\n", ax
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.drop:
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mov eax, [esp]
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mov eax, [eax + NET_BUFF.device]
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inc [eax + NET_DEVICE.packets_rx_drop]
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DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: dropping\n"
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call net_buff_free
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ret
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.err:
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mov eax, [esp]
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mov eax, [eax + NET_BUFF.device]
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inc [eax + NET_DEVICE.packets_rx_err]
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DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: invalid frame received\n"
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call net_buff_free
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ret
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;-----------------------------------------------------------------;
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; ;
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; eth_output ;
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; ;
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; IN: ax = protocol ;
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; ebx = device ptr ;
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; ecx = payload size ;
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; edx = pointer to destination mac ;
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; ;
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; OUT: eax = start of net frame / 0 on error ;
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; ebx = device ptr ;
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; ecx = payload size ;
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; edi = start of payload ;
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; ;
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;-----------------------------------------------------------------;
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align 4
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eth_output:
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DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_output: size=%u device=%x\n", ecx, ebx
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cmp ecx, [ebx + ETH_DEVICE.mtu]
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ja .too_large
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push ecx
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push ax edx
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add ecx, sizeof.ETH_header + NET_BUFF.data
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stdcall net_buff_alloc, ecx
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test eax, eax
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jz .out_of_ram
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mov [eax + NET_BUFF.type], NET_BUFF_ETH
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mov [eax + NET_BUFF.device], ebx
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mov [eax + NET_BUFF.offset], NET_BUFF.data
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lea edi, [eax + NET_BUFF.data]
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pop esi
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movsd
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movsw
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lea esi, [ebx + ETH_DEVICE.mac]
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movsd
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movsw
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pop ax
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stosw
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lea eax, [edi - sizeof.ETH_header - NET_BUFF.data] ; Set eax to buffer start
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pop ecx
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lea edx, [ecx + sizeof.ETH_header] ; Set edx to complete buffer size
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cmp edx, ETH_FRAME_MINIMUM
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jbe .adjust_size
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.done:
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mov [eax + NET_BUFF.length], edx
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DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_output: ptr=%x size=%u\n", eax, edx
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ret
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.adjust_size:
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mov edx, ETH_FRAME_MINIMUM
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test edx, edx ; clear zero flag
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jmp .done
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.out_of_ram:
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inc [ebx + NET_DEVICE.packets_tx_drop]
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DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_output: Out of ram!\n"
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add esp, 4+2
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pop ecx
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xor eax, eax
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ret
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.too_large:
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inc [eax + NET_DEVICE.packets_tx_err]
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DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_output: Packet too large!\n"
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xor eax, eax
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ret
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;-----------------------------------------------------------------;
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; ;
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; eth_api: Part of system function 76. ;
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; ;
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; IN: bl = subfunction number ;
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; bh = device number ;
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; ecx, edx, .. depends on subfunction ;
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; ;
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; OUT: depends on subfunction ;
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; ;
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;-----------------------------------------------------------------;
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align 4
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eth_api:
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cmp bh, NET_DEVICES_MAX
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ja .error
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movzx eax, bh
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mov eax, dword [net_device_list + 4*eax]
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cmp [eax + NET_DEVICE.device_type], NET_DEVICE_ETH
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jne .error
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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 .read_mac ; 0
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.number = ($ - .table) / 4 - 1
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.error:
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or eax, -1
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ret
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.read_mac:
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movzx ebx, word [eax + ETH_DEVICE.mac]
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mov eax, dword [eax + ETH_DEVICE.mac + 2]
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mov [esp+20+4], ebx ; FIXME
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ret
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