;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2009. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; STACK.INC ;;
;; ;;
;; BASIC TCP/IP stack for KolibriOS ;;
;; ;;
;; Written by hidnplayr@kolibrios.org ;;
;; ;;
;; based on the work of Mike Hibbett, mikeh@oceanfree.net ;;
;; but also Paolo Franchetti ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 1483 $
__DEBUG_LEVEL_OLD__ equ __DEBUG_LEVEL__
__DEBUG_LEVEL__ equ 1 ; this sets the debug level for network part of kernel
uglobal
last_1sTick db ?
last_1hsTick dd ?
endg
MAX_NET_DEVICES equ 16
QUEUE_BEFORE_SENDING equ 0 ; 1 or 0 (enable or disable) currently only affects ethernet
MIN_EPHEMERAL_PORT equ 49152
MAX_EPHEMERAL_PORT equ 61000
ETHER equ 1337 ; TODO: find another value for this (how does it work in posix ?)
ETHER_ARP equ 0x0608
AF_UNSPEC equ 0
AF_UNIX equ 1
AF_INET4 equ 2
;AF_AX25 equ 3
;AF_IPX equ 4
;AF_APPLETALK equ 5
;AF_NETROM equ 6
;AF_BRIDGE equ 7
;AF_AAL5 equ 8
;AF_X25 equ 9
;AF_INET6 equ 10
;AF_MAX equ 12
IP_PROTO_IP equ 0
IP_PROTO_ICMP equ 1
IP_PROTO_TCP equ 6
IP_PROTO_UDP equ 17
; Socket types
SOCK_STREAM = 1
SOCK_DGRAM = 2
SOCK_RAW = 3
TCB_LISTEN equ 1
TCB_SYN_SENT equ 2
TCB_SYN_RECEIVED equ 3
TCB_ESTABLISHED equ 4
TCB_FIN_WAIT_1 equ 5
TCB_FIN_WAIT_2 equ 6
TCB_CLOSE_WAIT equ 7
TCB_CLOSING equ 8
TCB_LAST_ACK equ 9
TCB_TIMED_WAIT equ 10
TCB_CLOSED equ 11
TH_FIN equ 1 shl 0
TH_SYN equ 1 shl 1
TH_RST equ 1 shl 2
TH_PUSH equ 1 shl 3
TH_ACK equ 1 shl 4
TH_URG equ 1 shl 5
macro inc_INET reg {
add byte [reg + 3], 1
adc byte [reg + 2], 0
adc byte [reg + 1], 0
adc byte [reg], 0
}
macro add_INET reg {
add byte [reg + 3], cl
adc byte [reg + 2], ch
adc byte [reg + 1], 0
adc byte [reg], 0
rol ecx, 16
add byte [reg + 1], cl
adc byte [reg], ch
rol ecx, 16
}
macro pseudo_random reg {
add reg, [esp]
rol reg, 5
xor reg, [timer_ticks]
imul reg, 214013
xor reg, 0xdeadbeef
rol reg, 9
pushd reg
mov word [esp], 0x8080 ; kernel heap start addr (os_stack)
xor reg, [esp]
add esp, 4
}
include "queue.inc"
include "ARP.inc"
include "IPv4.inc"
include "ethernet.inc"
include "socket.inc"
include "tcp.inc"
include "udp.inc"
include "icmp.inc"
;-----------------------------------------------------------------
;
; stack_init
;
; This function calls all network init procedures
;
; IN: /
; OUT: /
;
;-----------------------------------------------------------------
align 4
stack_init:
call ETH_init
call IPv4_init
call ARP_init
call UDP_init
call TCP_init
call ICMP_init
call socket_init
mov al, 0 ; set up 1s timer
out 0x70, al
in al, 0x71
mov [last_1sTick], al
ret
;-----------------------------------------------------------------
;
; stack_handler
;
; This function calls all network init procedures
;
; IN: /
; OUT: /
;
;-----------------------------------------------------------------
align 4
stack_handler:
cmp [ETH_RUNNING], 0
je .exit
; Test for 10ms tick
mov eax, [timer_ticks]
cmp eax, [last_1hsTick]
je .exit
mov [last_1hsTick], eax
call ETH_handler ; handle all queued ethernet packets
if QUEUE_BEFORE_SENDING
call ETH_send_queued
end if
call TCP_send_queued
.sec_tick:
; Test for 1 second tick
mov al, 0
out 0x70, al
in al, 0x71
cmp al, [last_1sTick]
je .exit
mov [last_1sTick], al
call ARP_decrease_entry_ttls
call IPv4_decrease_fragment_ttls
call TCP_decrease_socket_ttls
.exit:
ret
;-----------------------------------------------------------------
;
; checksum_1
;
; This is the first of two functions needed to calculate a checksum.
;
; IN: edx = start offset for semi-checksum
; esi = pointer to data
; ecx = data size
; OUT: edx = semi-checksum
;
;
; Code was optimized by diamond
;
;-----------------------------------------------------------------
align 4
checksum_1:
shr ecx, 1
pushf
jz .no_2
shr ecx, 1
pushf
jz .no_4
shr ecx, 1
pushf
jz .no_8
.loop:
add dl, [esi+1]
adc dh, [esi+0]
adc dl, [esi+3]
adc dh, [esi+2]
adc dl, [esi+5]
adc dh, [esi+4]
adc dl, [esi+7]
adc dh, [esi+6]
adc edx, 0
add esi, 8
dec ecx
jnz .loop
adc edx, 0
.no_8:
popf
jnc .no_4
add dl, [esi+1]
adc dh, [esi+0]
adc dl, [esi+3]
adc dh, [esi+2]
adc edx, 0
add esi, 4
.no_4:
popf
jnc .no_2
add dl, [esi+1]
adc dh, [esi+0]
adc edx, 0
inc esi
inc esi
.no_2:
popf
jnc .end
add dh, [esi+0]
adc edx, 0
.end:
ret
;-----------------------------------------------------------------
;
; checksum_2
;
; This function calculates the final ip/tcp/udp checksum for you
;
; IN: edx = semi-checksum
; OUT: dx = checksum (in INET byte order)
;
;-----------------------------------------------------------------
align 4
checksum_2:
mov ecx, edx
shr ecx, 16
and edx, 0xffff
add edx, ecx
mov ecx, edx
shr ecx, 16
add edx, ecx
not dx
jnz .not_zero
dec dx
.not_zero:
xchg dl, dh
DEBUGF 1,"Checksum: %x\n",dx
ret
;----------------------------------------------------------------
;
; System function to work with network devices (73)
;
;----------------------------------------------------------------
align 4
sys_network:
cmp ebx, -1
jne @f
mov eax, [ETH_RUNNING]
jmp .return
@@:
cmp bh, MAX_NET_DEVICES ; Check if device number exists
jge .doesnt_exist
mov esi, ebx
and esi, 0x0000ff00
shr esi, 6
cmp dword [esi + ETH_DRV_LIST], 0 ; check if driver is running
je .doesnt_exist
test bl, bl ; 0 = Get device type (ethernet/token ring/...)
jnz @f
; todo
xor eax, eax
jmp .return
@@:
dec bl ; 1 = Get device name
jnz @f
mov esi, [esi + ETH_DRV_LIST]
mov esi, [esi + ETH_DEVICE.name]
mov edi, ecx
mov ecx, 64 ; max length
repnz movsb
xor eax, eax
jmp .return
@@:
dec bl ; 2 = Reset the device
jnz @f
mov esi, [esi + ETH_DRV_LIST]
call [esi + ETH_DEVICE.reset]
jmp .return
@@:
dec bl ; 3 = Stop driver for this device
jnz @f
mov esi, [esi + ETH_DRV_LIST]
call [esi + ETH_DEVICE.unload]
jmp .return
@@:
dec bl ; 4 = Get driver pointer
jnz @f
; ..;
@@:
; ... ; 5 Get driver name
.doesnt_exist:
DEBUGF 1,"sys_network: invalid device/function specified!\n"
mov eax, -1
.return:
mov [esp+28+4], eax
ret
;----------------------------------------------------------------
;
; System Function To work with Protocols (75)
;
;----------------------------------------------------------------
align 4
sys_protocols:
cmp bh, MAX_NET_DEVICES ; Check if device number exists
jge .doesnt_exist
mov esi, ebx
and esi, 0x0000ff00
shr esi, 6
cmp dword [esi + ETH_DRV_LIST], 0 ; check if driver is running TODO: check other lists too
je .doesnt_exist
push .return ; return address (we will be using jumps instead of calls)
mov eax, ebx ; set ax to protocol number
shr eax, 16 ;
cmp ax , IP_PROTO_IP
je IPv4_API
cmp ax , IP_PROTO_ICMP
je ICMP_API
cmp ax , IP_PROTO_UDP
je UDP_API
cmp ax , IP_PROTO_TCP
je TCP_API
cmp ax , ETHER_ARP
je ARP_API
cmp ax , ETHER
je ETH_API
add esp, 4 ; if we reached here, no function was called, so we need to balance stack
.doesnt_exist:
DEBUGF 1,"sys_protocols: protocol %u doesnt exist on device %u!\n",ax, bh
mov eax, -1
.return:
mov [esp+28+4], eax
ret
__DEBUG_LEVEL__ equ __DEBUG_LEVEL_OLD__