Subversion Repositories Kolibri OS

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;                                                                 ;;

;; Copyright (C) KolibriOS team 2004-2013. 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: 3523 $

uglobal

        net_10ms        dd ?

        net_tmr_count   dw ?

endg

DEBUG_NETWORK_ERROR     = 1

DEBUG_NETWORK_VERBOSE   = 0

NET_DEVICES_MAX         = 16

ARP_BLOCK               = 1             ; true or false

EPHEMERAL_PORT_MIN      = 49152

EPHEMERAL_PORT_MAX      = 61000

MIN_EPHEMERAL_PORT_N    = 0x00C0        ; same in Network byte order (FIXME)

MAX_EPHEMERAL_PORT_N    = 0x48EE        ; same in Network byte order (FIXME)

; Ethernet protocol numbers

ETHER_PROTO_ARP                 = 0x0608

ETHER_PROTO_IPv4                = 0x0008

ETHER_PROTO_IPv6                = 0xDD86

ETHER_PROTO_PPP_DISCOVERY       = 0x6388

ETHER_PROTO_PPP_SESSION         = 0x6488

; Internet protocol numbers

IP_PROTO_IP             = 0

IP_PROTO_ICMP           = 1

IP_PROTO_TCP            = 6

IP_PROTO_UDP            = 17

; PPP protocol numbers

PPP_PROTO_IPv4          = 0x2100

PPP_PROTO_IPV6          = 0x5780

PPP_PROTO_ETHERNET      = 666           ; FIXME

;Protocol family

AF_UNSPEC               = 0

AF_LOCAL                = 1

AF_INET4                = 2

AF_INET6                = 10

AF_PPP                  = 777           ; FIXME

; 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

SO_BINDTODEVICE         = 1 shl 9

SO_NONBLOCK             = 1 shl 31

; Socket flags for user calls

MSG_PEEK                = 0x02

MSG_DONTWAIT            = 0x40

; Socket level

SOL_SOCKET              = 0

; Socket States

SS_NOFDREF              = 0x0001        ; no file table ref any more

SS_ISCONNECTED          = 0x0002        ; socket connected to a peer

SS_ISCONNECTING         = 0x0004        ; in process of connecting to peer

SS_ISDISCONNECTING      = 0x0008        ; in process of disconnecting

SS_CANTSENDMORE         = 0x0010        ; can't send more data to peer

SS_CANTRCVMORE          = 0x0020        ; can't receive more data from peer

SS_RCVATMARK            = 0x0040        ; at mark on input

SS_ISABORTING           = 0x0080        ; aborting fd references - close()

SS_RESTARTSYS           = 0x0100        ; restart blocked system calls

SS_ISDISCONNECTED       = 0x0800        ; socket disconnected from peer

SS_ASYNC                = 0x1000        ; async i/o notify

SS_ISCONFIRMING         = 0x2000        ; deciding to accept connection req

SS_MORETOCOME           = 0x4000

SS_BLOCKED              = 0x8000

SOCKET_MAXDATA          = 4096*8        ; must be 4096*(power of 2) where 'power of 2' is at least 8

MAX_backlog             = 20            ; maximum backlog for stream sockets

; Error Codes

ENOBUFS                 = 1

EINPROGRESS             = 2

EOPNOTSUPP              = 4

EWOULDBLOCK             = 6

ENOTCONN                = 9

EALREADY                = 10

EINVAL                  = 11

EMSGSIZE                = 12

ENOMEM                  = 18

EADDRINUSE              = 20

ECONNREFUSED            = 61

ECONNRESET              = 52

EISCONN                 = 56

ETIMEDOUT               = 60

ECONNABORTED            = 53

; Api protocol numbers

API_ETH                 = 0

API_IPv4                = 1

API_ICMP                = 2

API_UDP                 = 3

API_TCP                 = 4

API_ARP                 = 5

API_PPPOE               = 6

API_IPv6                = 7

; Network device types

NET_DEVICE_LOOPBACK     = 0

NET_DEVICE_ETH          = 1

NET_DEVICE_SLIP         = 2

; Network link types (link protocols)

NET_LINK_LOOPBACK       = 0     ;;; Really a link type?

NET_LINK_MAC            = 1     ; Media access control (ethernet, isdn, ...)

NET_LINK_PPP            = 2     ; Point to Point Protocol (PPPoE, ...)

NET_LINK_IEEE802.11     = 3     ; IEEE 802.11 (WiFi)

; Hardware acceleration bits

HWACC_TCP_IPv4          = 1 shl 0

struct  NET_DEVICE

        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 ?    ;

        link_state      dd ?    ; link state (0 = no link)

        hwacc           dd ?    ; bitmask stating enabled HW 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

}

; Network to Hardware byte order (dword)

macro ntohd reg {

        rol     word reg, 8

        rol     dword reg, 16

        rol     word reg , 8

}

; Network to Hardware byte order (word)

macro ntohw reg {

        rol     word reg, 8

}

include "queue.inc"

include "loopback.inc"

include "ethernet.inc"

include "PPPoE.inc"

include "ARP.inc"

include "IPv4.inc"

include "IPv6.inc"

include "icmp.inc"

include "udp.inc"

include "tcp.inc"

include "socket.inc"

uglobal

align 4

        NET_RUNNING     dd  ?

        NET_DRV_LIST    rd  NET_DEVICES_MAX

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, (NET_DEVICES_MAX + 2)

        rep stosd

        ETH_init

        PPPoE_init

        IPv4_init

;        IPv6_init

        ICMP_init

        ARP_init

        UDP_init

        TCP_init

        SOCKET_init

        LOOP_init

        mov     [net_tmr_count], 0

        ret

; Wakeup every tick.

proc stack_handler_has_work?

        mov     eax, [timer_ticks]

        cmp     eax, [net_10ms]

        ret

endp

;-----------------------------------------------------------------

;

; stack_handler

;

;  This function is called in kernel loop

;

;  IN:  /

;  OUT: /

;

;-----------------------------------------------------------------

align 4

stack_handler:

        ; Test for 10ms tick

        mov     eax, [timer_ticks]

        cmp     eax, [net_10ms]

        je      .exit

        mov     [net_10ms], eax

        cmp     [NET_RUNNING], 0

        je      .exit

        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

align 4

NET_packet_free:

        and     dword[esp+4], not 0xfff

        jmp     kernel_free

align 4

NET_link_changed:

        DEBUGF  DEBUG_NETWORK_VERBOSE, "NET_link_changed device=0x%x status=0x%x\n", ebx, [ebx + NET_DEVICE.link_state]

align 4

NET_send_event:

        DEBUGF  DEBUG_NETWORK_VERBOSE, "NET_send_event\n"

; Send event to all applications

        push    edi ecx

        mov     edi, SLOT_BASE

        mov     ecx, [TASK_COUNT]

  .loop:

        add     edi, 256

        or      [edi + APPDATA.event_mask], EVENT_NETWORK2

        loop    .loop

        pop     ecx edi

        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  DEBUG_NETWORK_VERBOSE, "NET_Add_Device: %x\n", ebx   ;;; TODO: use mutex to lock net device list

        cmp     [NET_RUNNING], NET_DEVICES_MAX

        jae     .error

;----------------------------------

; Check if device is already listed

        mov     eax, ebx

        mov     ecx, NET_DEVICES_MAX    ; 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, NET_DEVICES_MAX

        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

        call    NET_send_event

        DEBUGF  DEBUG_NETWORK_VERBOSE, "Device number: %u\n", eax

        ret

  .error:

        or      eax, -1

        DEBUGF  DEBUG_NETWORK_ERROR, "Adding network device failed\n"

        ret

;-----------------------------------------------------------------

;

; NET_Remove_Device:

;

;  This function is called by network 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, NET_DEVICES_MAX

        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]

        call    NET_send_event

        xor     eax, eax

        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:

        call    NET_ptr_to_num4

        ror     edi, 2          ; If -1, stay -1

                                ; valid device numbers have last two bits 0, so do just shr

        ret

align 4

NET_ptr_to_num4:                ; Todo, place number in device structure so we only need to verify?

        push    ecx

        mov     ecx, NET_DEVICES_MAX

        mov     edi, NET_DRV_LIST

  .loop:

        cmp     ebx, [edi]

        je      .found

        add     edi, 4

        dec     ecx

        jnz     .loop

        or      edi, -1

        pop     ecx

        ret

  .found:

        sub     edi, NET_DRV_LIST

        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  DEBUG_NETWORK_VERBOSE, "Checksum: %x\n", dx

        ret

;----------------------------------------------------------------

;

;  System function to work with network devices (74)

;

;----------------------------------------------------------------

align 4

sys_network:

        cmp     bl, 255

        jne     @f

        mov     eax, [NET_RUNNING]

        mov     [esp+32], eax

        ret

   @@:

        cmp     bh, NET_DEVICES_MAX             ; 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      .packets_tx             ; 6

        dd      .packets_rx             ; 7

        dd      .bytes_tx               ; 8

        dd      .bytes_rx               ; 9

        dd      .state                  ; 10

  .number = ($ - .table) / 4 - 1

  .get_type:

        mov     eax, [eax + NET_DEVICE.device_type]

        mov     [esp+32], eax

        ret

  .get_dev_name:

        mov     esi, [eax + NET_DEVICE.name]

        mov     edi, ecx

        mov     ecx, 64/4 ; max length

        rep movsd

        xor     eax, eax

        mov     [esp+32], eax

        ret

  .reset:

        call    [eax + NET_DEVICE.reset]

        mov     [esp+32], eax

        ret

  .stop:

        call    [eax + NET_DEVICE.unload]

        mov     [esp+32], eax

        ret

  .get_ptr:

        mov     [esp+32], eax

        ret

  .get_drv_name:

        xor     eax, eax

        mov     [esp+32], eax

        ret

  .packets_tx:

        mov     eax, [eax + NET_DEVICE.packets_tx]

        mov     [esp+32], eax

        ret

  .packets_rx:

        mov     eax, [eax + NET_DEVICE.packets_rx]

        mov     [esp+32], eax

        ret

  .bytes_tx:

        mov     ebx, dword [eax + NET_DEVICE.bytes_tx + 4]

        mov     [esp+20], ebx

        mov     eax, dword [eax + NET_DEVICE.bytes_tx]

        mov     [esp+32], eax

        ret

  .bytes_rx:

        mov     ebx, dword [eax + NET_DEVICE.bytes_rx + 4]

        mov     [esp+20], ebx

        mov     eax, dword [eax + NET_DEVICE.bytes_rx]

        mov     [esp+32], eax

        ret

  .state:

        mov     eax, [eax + NET_DEVICE.link_state]

        mov     [esp+32], eax

        ret

  .doesnt_exist:

        mov     dword[esp+32], -1

        ret

;----------------------------------------------------------------

;

;  System function to work with protocols  (76)

;

;----------------------------------------------------------------

align 4

sys_protocols:

        cmp     bh, NET_DEVICES_MAX             ; 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, API_ETH

        je      ETH_api

        cmp     ax, API_IPv4

        je      IPv4_api

        cmp     ax, API_ICMP

        je      ICMP_api

        cmp     ax, API_UDP

        je      UDP_api

        cmp     ax, API_TCP

        je      TCP_api

        cmp     ax, API_ARP

        je      ARP_api

        cmp     ax, API_PPPOE

        je      PPPoE_api

        cmp     ax, API_IPv6

        je      IPv6_api

        add     esp, 4                           ; if we reached here, no function was called, so we need to balance stack

  .doesnt_exist:

        mov     eax, -1

  .return:

        mov     [esp+28+4], eax                 ; return eax value to the program

        ret