BlueGreycalmElegant

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  → /kernel/branches/net/network/stack.inc @ 1472

  → /kernel/branches/net/network/stack.inc @ 1473

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Ignore whitespace Rev 1472 → Rev 1473

/kernel/branches/net/network/stack.inc
19,6 → 19,9
$Revision$
__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 ?
25,12 → 28,12
endg
MAX_NET_DEVICES equ 16
QUEUE_BEFORE_SENDING equ 1 ; 1 or 0 (enable or disable) currently only affects ethernet
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 equ 1337 ; TODO: find another value for this (how does it work in posix ?)
ETHER_ARP equ 0x0608
AF_UNSPEC equ 0
207,35 → 210,230
;
; This is the first of two functions needed to calculate the TCP checksum.
;
; IN: edx = start offeset for semi-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:
xor eax, eax
shr ecx, 1
pushf
.loop:
lodsw
xchg al, ah
add edx, eax
loop .loop
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 ecx
inc ecx
.no_2:
popf
jnc .end
add dh, [esi]
add dh, [esi+0]
adc edx, 0
.end:
ret
.end:
;IN: 12 bytes of pseudoheader pushed onto the stack
; edx = start offset
;
; OUT: pseudochecksum in edx
align 4
checksum_pseudoheader:
add dl, [esp+5]
adc dh, [esp+4]
adc dl, [esp+7]
adc dh, [esp+6]
adc dl, [esp+9]
adc dh, [esp+8]
adc dl, [esp+11]
adc dh, [esp+10]
adc dl, [esp+13]
adc dh, [esp+12]
adc dl, [esp+15]
adc dh, [esp+14]
adc edx,0
ret 12
align 4
checksum_ip_header:
; This is the fast procedure to create or check a IP header without options
;
; To create a new checksum, the checksum field must be set to 0 before computation
;
; To check an existing checksum, leave the checksum as is, and it will be 0 after this procedure, if it was correct
xor edx, edx
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 dl, [esi+9]
adc dh, [esi+8]
; we skip 11th and 12th byte, they are the checksum bytes and should be 0 for re-calculation
adc dl, [esi+13]
adc dh, [esi+12]
adc dl, [esi+15]
adc dh, [esi+14]
adc dl, [esi+17]
adc dh, [esi+16]
adc dl, [esi+19]
adc dh, [esi+18]
adc edx, 0
call checksum_2
neg word [esi+10] ; zero will stay zero so we jsut get the checksum
add word [esi+10], dx ; , else we will get (new checksum - old checksum) in the end, wich should be 0 :)
ret
align 4
checksum_udp:
; This is the fast procedure to create or check a IP header without options
;
; To create a new checksum, the checksum field must be set to 0 before computation
;
; To check an existing checksum, leave the checksum as is, and it will be 0 after this procedure, if it was correct
xor edx, edx
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 dl, [esi+9]
adc dh, [esi+8]
; we skip 11th and 12th byte, they are the checksum bytes and should be 0 for re-calculation
adc dl, [esi+13]
adc dh, [esi+12]
adc dl, [esi+15]
adc dh, [esi+14]
adc dl, [esi+17]
adc dh, [esi+16]
adc dl, [esi+19]
adc dh, [esi+18]
adc edx, 0
call checksum_2
neg word [esi+10] ; zero will stay zero so we jsut get the checksum
add word [esi+10], dx ; , else we will get (new checksum - old checksum) in the end, wich should be 0 :)
ret
;-----------------------------------------------------------------
;
; checksum_2
400,3 → 598,6
.return:
mov [esp+28+4], eax
ret
__DEBUG_LEVEL__ equ __DEBUG_LEVEL_OLD__