;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; 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: 2621 $
__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 = 16
MIN_EPHEMERAL_PORT = 49152
MAX_EPHEMERAL_PORT = 61000
; Ethernet protocol numbers
ETHER_ARP = 0x0608
ETHER_IPv4 = 0x0008
ETHER_PPP_DISCOVERY = 0x6388
ETHER_PPP_SESSION = 0x6488
;Protocol family
AF_UNSPEC = 0
AF_UNIX = 1
AF_INET4 = 2
AF_INET6 = 10
; Internet protocol numbers
IP_PROTO_IP = 0
IP_PROTO_ICMP = 1
IP_PROTO_TCP = 6
IP_PROTO_UDP = 17
; Socket types
SOCK_STREAM = 1
SOCK_DGRAM = 2
SOCK_RAW = 3
; Socket options
SO_ACCEPTCON = 1 shl 0
SO_BROADCAST = 1 shl 1
SO_DEBUG = 1 shl 2
SO_DONTROUTE = 1 shl 3
SO_KEEPALIVE = 1 shl 4
SO_OOBINLINE = 1 shl 5
SO_REUSEADDR = 1 shl 6
SO_REUSEPORT = 1 shl 7
SO_USELOOPBACK = 1 shl 8
; Socket States
SS_NOFDREF = 0x001 ; no file table ref any more
SS_ISCONNECTED = 0x002 ; socket connected to a peer
SS_ISCONNECTING = 0x004 ; in process of connecting to peer
SS_ISDISCONNECTING = 0x008 ; in process of disconnecting
SS_CANTSENDMORE = 0x010 ; can't send more data to peer
SS_CANTRCVMORE = 0x020 ; can't receive more data from peer
SS_RCVATMARK = 0x040 ; at mark on input
SS_ISABORTING = 0x080 ; aborting fd references - close()
SS_RESTARTSYS = 0x100 ; restart blocked system calls
SS_ISDISCONNECTED = 0x800 ; socket disconnected from peer
SS_ASYNC = 0x100 ; async i/o notify
SS_ISCONFIRMING = 0x200 ; deciding to accept connection req
SS_MORETOCOME = 0x400
SOCKET_MAXDATA = 4096*32 ; must be 4096*(power of 2) where 'power of 2' is at least 8
; Network driver types
NET_TYPE_ETH = 1
NET_TYPE_SLIP = 2
MAX_backlog = 20 ; maximum backlog for stream sockets
; Error Codes
ENOBUFS = 55
ECONNREFUSED = 61
ECONNRESET = 52
ETIMEDOUT = 60
ECONNABORTED = 53
struct 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)
ends
; 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
}
include "queue.inc"
include "ethernet.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_DEFAULT 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 + 2)
rep stosd
; 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 ;;; TODO: use mutex to lock net device list
mov eax, [NET_RUNNING]
cmp eax, MAX_NET_DEVICES
jae .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
;-----------------------------
; Add device to the found slot
mov [edi], ebx ; add device to list
mov eax, edi ; Calculate device number in eax
sub eax, NET_DRV_LIST
shr eax, 2
inc [NET_RUNNING] ; Indicate that one more network device is up and running
cmp eax, 1 ; If it's the first network device, try to set it as default
jne @f
push eax
call NET_set_default
pop eax
@@:
DEBUGF 1,"Device number: %u\n", eax
ret
.error:
or eax, -1
DEBUGF 2,"Adding network device failed\n"
ret
;-----------------------------------------------------------------
;
; NET_set_default
;
; API to set the default interface
;
; IN: Device num in eax
; OUT: Device num in eax, -1 on error
;
;-----------------------------------------------------------------
align 4
NET_set_default:
DEBUGF 1,"NET_set_default %x\n", eax
cmp eax, MAX_NET_DEVICES
jae .error
cmp [NET_DRV_LIST+eax*4], 0
je .error
mov [NET_DEFAULT], eax
DEBUGF 1,"Device number %u is now default!\n", eax
ret
.error:
or eax, -1
DEBUGF 2,"Setting default network device failed\n"
ret
;-----------------------------------------------------------------
;
; NET_Remove_Device:
;
; This function is called by etwork drivers,
; to unregister network devices from the kernel
; d
; IN: Pointer to device structure in ebx
; OUT: eax: -1 on error
;
;-----------------------------------------------------------------
align 4
NET_remove_device:
cmp [NET_RUNNING], 0
je .error
cmp [NET_DRV_LIST], ebx
jne @f
mov [NET_DRV_LIST], 0
cmp [NET_RUNNING], 1
je @f
; there are still active devices, find one and make it default
xor eax, eax
mov ecx, MAX_NET_DEVICES
mov edi, NET_DRV_LIST
repe scasd
je @f
shr edi, 2
dec edi
mov [NET_DEFAULT], edi
@@:
;----------------------------
; Find the driver in the list
mov eax, ebx
mov ecx, MAX_NET_DEVICES
mov edi, NET_DRV_LIST+4
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: ; FIXME: make default device easily accessible
cmp ebx, -1
jne @f
mov eax, [NET_RUNNING]
jmp .return
@@:
cmp bh, MAX_NET_DEVICES ; Check if device number exists
jae .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
mov eax, [esi + NET_DRV_LIST]
and ebx, 0x000000ff
cmp ebx, .number
ja .doesnt_exist
jmp dword [.table + 4*ebx]
.table:
dd .get_type ; 0
dd .get_dev_name ; 1
dd .reset ; 2
dd .stop ; 3
dd .get_ptr ; 4
dd .get_drv_name ; 5
dd .set_default ; 6
.number = ($ - .table) / 4 - 1
.get_type: ; 0 = Get device type (ethernet/token ring/...)
mov eax, [eax + NET_DEVICE.type]
jmp .return
.get_dev_name: ; 1 = Get device name
mov esi, [eax + NET_DEVICE.name]
mov edi, ecx
mov ecx, 64/4 ; max length
rep movsd
xor eax, eax
jmp .return
.reset: ; 2 = Reset the device
call [eax + NET_DEVICE.reset]
jmp .return
.stop: ; 3 = Stop driver for this device
call [eax + NET_DEVICE.unload]
jmp .return
.get_ptr: ; 4 = Get driver pointer
jmp .return
.get_drv_name: ; 5 = Get driver name
xor eax, eax
jmp .return
.set_default: ; 6 = Set default device
call NET_set_default
jmp .return
.doesnt_exist:
DEBUGF 1,"sys_network: invalid device/function specified!\n"
mov eax, -1
.return:
mov [esp+32], eax
ret
;----------------------------------------------------------------
;
; System function to work with protocols (75)
;
;----------------------------------------------------------------
align 4
sys_protocols:
cmp bh, MAX_NET_DEVICES ; Check if device number exists
jae .doesnt_exist
mov esi, ebx
and esi, 0x0000ff00
shr esi, 6 ; now we have the device num * 4 in esi
cmp [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
; cmp ax, API_PPPoE
; je PPPoE_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 ; return eax value to the program
ret
__DEBUG_LEVEL__ equ __DEBUG_LEVEL_OLD__