;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; STACK.INC ;;
;; ;;
;; TCP/IP stack for KolibriOS ;;
;; ;;
;; Written by hidnplayr@kolibrios.org ;;
;; ;;
;; Some parts of code are based on the work of: ;;
;; Mike Hibbett (menuetos network stack) ;;
;; Eugen Brasoveanu (solar os network stack and drivers) ;;
;; mike.dld (kolibrios socket code) ;;
;; ;;
;; TCP part is based on 4.4BSD ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 1773 $
__DEBUG_LEVEL_OLD__ equ __DEBUG_LEVEL__ ; use seperate debug level for network part of kernel
__DEBUG_LEVEL__ equ 1
uglobal
net_10ms dd ?
net_tmr_count dw ?
endg
MAX_NET_DEVICES equ 16
MIN_EPHEMERAL_PORT equ 49152
MAX_EPHEMERAL_PORT equ 61000
; Ethernet protocol numbers
ETHER_ARP equ 0x0608
ETHER_IPv4 equ 0x0008
ETHER_PPP_DISCOVERY equ 0x6388
ETHER_PPP_SESSION equ 0x6488
;Protocol family
AF_UNSPEC equ 0
AF_UNIX equ 1
AF_INET4 equ 2
AF_INET6 equ 10
; Internet protocol numbers
IP_PROTO_IP equ 0
IP_PROTO_ICMP equ 1
IP_PROTO_TCP equ 6
IP_PROTO_UDP equ 17
; Socket types
SOCK_STREAM equ 1
SOCK_DGRAM equ 2
SOCK_RAW equ 3
; Socket options
SO_ACCEPTCON equ 1
; Socket States
SS_NOFDREF equ 0x001 ; no file table ref any more
SS_ISCONNECTED equ 0x002 ; socket connected to a peer
SS_ISCONNECTING equ 0x004 ; in process of connecting to peer
SS_ISDISCONNECTING equ 0x008 ; in process of disconnecting
SS_CANTSENDMORE equ 0x010 ; can't send more data to peer
SS_CANTRCVMORE equ 0x020 ; can't receive more data from peer
SS_RCVATMARK equ 0x040 ; at mark on input
SS_ISABORTING equ 0x080 ; aborting fd references - close()
SS_RESTARTSYS equ 0x100 ; restart blocked system calls
SS_ISDISCONNECTED equ 0x800 ; socket disconnected from peer
SS_ASYNC equ 0x100 ; async i/o notify
SS_ISCONFIRMING equ 0x200 ; deciding to accept connection req
SS_MORETOCOME equ 0x400 ;
SOCKET_MAXDATA equ 4096*32 ; must be 4096*(power of 2) where 'power of 2' is at least 8
; Network driver types
NET_TYPE_ETH equ 1
NET_TYPE_SLIP equ 2
MAX_backlog equ 20 ; maximum backlog for stream sockets
; Error Codes
ENOBUFS equ 55
ECONNREFUSED equ 61
ECONNRESET equ 52
ETIMEDOUT equ 60
ECONNABORTED equ 53
virtual at 0
NET_DEVICE:
.type dd ? ; Type field
.mtu dd ? ; Maximal Transmission Unit
.name dd ? ; Ptr to 0 terminated string
.unload dd ? ; Ptrs to driver functions
.reset dd ? ;
.transmit dd ? ;
.bytes_tx dq ? ; Statistics, updated by the driver
.bytes_rx dq ? ;
.packets_tx dd ? ;
.packets_rx dd ? ;
; .hwacc dd ? ; bitmask stating available hardware accelerations (offload engines)
.end:
end virtual
; Exactly as it says..
macro pseudo_random reg {
add reg, [esp]
rol reg, 5
xor reg, [timer_ticks]
add reg, [CPU_FREQ]
imul reg, 214013
xor reg, 0xdeadbeef
rol reg, 9
}
macro ntohd reg {
rol word reg, 8
rol dword reg, 16
rol word reg , 8
}
macro ntohw reg {
rol word reg, 8
}
macro packet_to_debug { ; set esi to packet you want to print, ecx to number of bytes
local .loop
.loop:
lodsb
DEBUGF 1,"%x ", eax:2
loop @r
}
include "queue.inc"
include "ethernet.inc"
;include "slip.inc"
;include "pppoe.inc"
include "ARP.inc"
include "IPv4.inc"
include "icmp.inc"
include "udp.inc"
include "tcp.inc"
include "socket.inc"
align 4
uglobal
NET_RUNNING dd ?
NET_DRV_LIST rd MAX_NET_DEVICES
endg
;-----------------------------------------------------------------
;
; stack_init
;
; This function calls all network init procedures
;
; IN: /
; OUT: /
;
;-----------------------------------------------------------------
align 4
stack_init:
; Init the network drivers list
xor eax, eax
mov edi, NET_RUNNING
mov ecx, MAX_NET_DEVICES + 1
rep stosd
ETH_init
; SLIP_init
; PPPOE_init
IPv4_init
ICMP_init
ARP_init
UDP_init
TCP_init
SOCKET_init
mov [net_tmr_count], 0
ret
;-----------------------------------------------------------------
;
; stack_handler
;
; This function is called in kernel loop
;
; IN: /
; OUT: /
;
;-----------------------------------------------------------------
align 4
stack_handler:
cmp [NET_RUNNING], 0
je .exit
; Test for 10ms tick
mov eax, [timer_ticks]
cmp eax, [net_10ms]
je .exit
mov [net_10ms], eax
test [net_10ms], 0x0f ; 160ms
jnz .exit
TCP_timer_160ms
test [net_10ms], 0x3f ; 640ms
jnz .exit
TCP_timer_640ms
ARP_decrease_entry_ttls
IPv4_decrease_fragment_ttls
.exit:
ret
;-----------------------------------------------------------------
;
; NET_Add_Device:
;
; This function is called by the network drivers,
; to register each running NIC to the kernel
;
; IN: Pointer to device structure in ebx
; OUT: Device num in eax, -1 on error
;
;-----------------------------------------------------------------
align 4
NET_add_device:
DEBUGF 1,"NET_Add_Device: %x\n", ebx
mov eax, [NET_RUNNING]
cmp eax, MAX_NET_DEVICES
jge .error
;----------------------------------
; Check if device is already listed
mov eax, ebx
mov ecx, MAX_NET_DEVICES ; We need to check whole list because a device may be removed without re-organizing list
mov edi, NET_DRV_LIST
repne scasd ; See if device is already in the list
jz .error
;----------------------------
; Find empty slot in the list
xor eax, eax
mov ecx, MAX_NET_DEVICES
mov edi, NET_DRV_LIST
repne scasd
jnz .error
sub edi, 4
cmp [ebx + NET_DEVICE.type], NET_TYPE_ETH
je .ethernet
cmp [ebx + NET_DEVICE.type], NET_TYPE_SLIP
je .slip
DEBUGF 1,"Unknown network device type: %u\n", [ebx + NET_DEVICE.type]
jmp .error
.ethernet:
DEBUGF 1,"Trying to add an ethernet device\n"
inc [ETH_RUNNING] ; Indicate that one more ethernet device is up and running
jmp .add_it
.slip:
DEBUGF 1,"Trying to add a slip device\n"
;;;;
jmp .error
.add_it:
;-----------------------------
; Add device to the found slot
mov [edi], ebx ; add device to list
sub edi, NET_DRV_LIST ; Calculate device number in eax
mov eax, edi ;
shr eax, 2
inc [NET_RUNNING] ; Indicate that one more network device is up and running
DEBUGF 1,"Device number: %u\n",eax
ret
.error:
or eax, -1
DEBUGF 2,"Adding network device failed\n"
ret
;-----------------------------------------------------------------
;
; NET_Remove_Device:
;
; This function is called by etwork drivers,
; to unregister network devices from the kernel
;
; IN: Pointer to device structure in ebx
; OUT: eax: -1 on error
;
;-----------------------------------------------------------------
align 4
NET_remove_device:
cmp [NET_RUNNING], 0
je .error
;----------------------------
; Find the driver in the list
mov eax, ebx
mov ecx, MAX_NET_DEVICES
mov edi, NET_DRV_LIST
repne scasd
jnz .error
;------------------------
; Remove it from the list
xor eax, eax
mov dword [edi-4], eax
dec [NET_RUNNING]
ret
.error:
or eax, -1
ret
;-----------------------------------------------------------------
;
; NET_ptr_to_num
;
; IN: ebx = ptr to device struct
; OUT: edi = -1 on error, device number otherwise
;
;-----------------------------------------------------------------
align 4
NET_ptr_to_num:
push ecx
mov ecx, MAX_NET_DEVICES
mov edi, NET_DRV_LIST
.loop:
cmp ebx, [edi]
jz .found
add edi, 4
dec ecx
jnz .loop
; repnz scasd could work too if eax is used instead of ebx!
or edi, -1
pop ecx
ret
.found:
sub edi, NET_DRV_LIST
shr edi, 2
pop ecx
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 dx, cx
test dx, dx ; it seems that ZF is not set when CF is set :(
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, [NET_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 + NET_DRV_LIST], 0 ; check if driver is running
je .doesnt_exist
test bl, bl ; 0 = Get device type (ethernet/token ring/...)
jnz @f
xor eax, eax
jmp .return
@@:
dec bl ; 1 = Get device name
jnz @f
mov esi, [esi + NET_DRV_LIST]
mov esi, [esi + NET_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 + NET_DRV_LIST]
call [esi + NET_DEVICE.reset]
jmp .return
@@:
dec bl ; 3 = Stop driver for this device
jnz @f
mov esi, [esi + NET_DRV_LIST]
call [esi + NET_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 ; now we have the device num * 4 in esi
cmp dword [esi + NET_DRV_LIST], 0 ; check if driver is running
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 , 1337 ;;;;;
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__