forked from KolibriOS/kolibrios
1074 lines
27 KiB
PHP
1074 lines
27 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; SOCKET.INC ;;
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;; ;;
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;; Sockets constants, structures and functions ;;
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;; ;;
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;; Last revision: 11.11.2006 ;;
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;; ;;
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;; This file contains the following: ;;
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;; is_localport_unused ;;
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;; get_free_socket ;;
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;; socket_open ;;
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;; socket_open_tcp ;;
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;; socket_close ;;
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;; socket_close_tcp ;;
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;; socket_poll ;;
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;; socket_status ;;
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;; socket_read ;;
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;; socket_write ;;
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;; socket_write_tcp ;;
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;; ;;
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;; ;;
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;; Changes history: ;;
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;; 22.09.2003 - [Mike Hibbett] : mikeh@oceanfree.net ;;
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;; 11.11.2006 - [Johnny_B] and [smb] ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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;
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; Socket Descriptor + Buffer
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;
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; 0 1 2 3
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; 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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;
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 0| Status ( of this buffer ) |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 4| Application Process ID |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 8| Local IP Address |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 12| Local IP Port | Unused ( set to 0 ) |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 16| Remote IP Address |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 20| Remote IP Port | Unused ( set to 0 ) |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 24| Rx Data Count INTEL format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 28| TCB STATE INTEL format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 32| TCB Timer (seconds) INTEL format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 36| ISS (Inital Sequence # used by this connection ) INET format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 40| IRS ( Inital Receive Sequence # ) INET format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 44| SND.UNA Seq # of unack'ed sent packets INET format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 48| SND.NXT Next send seq # to use INET format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 52| SND.WND Send window INET format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 56| RCV.NXT Next expected receive sequence # INET format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 60| RCV.WND Receive window INET format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 64| SEG.LEN Segment length INTEL format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 68| SEG.WND Segment window INTEL format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 72| Retransmit queue # NOW WINDOW SIZE TIMER INTEL format|
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; 76| RX Data Buffer |
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; +-+-+-.......... -+
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; so, define struct
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struc SOCKET
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{
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.PrevPtr dd ?
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.NextPtr dd ?
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.Status dd ? ;+00 - Status ( of this buffer )
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.PID dd ? ;+04 - Application Process ID
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.LocalIP dd ? ;+08 - Local IP Address
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.LocalPort dw ? ;+12 - Local Port
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.RemoteIP dd ? ;+16 - Remote IP Address
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.RemotePort dw ? ;+20 - Remote Port
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.OrigRemoteIP dd ?
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.OrigRemotePort dw ?
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.rxDataCount dd ? ;+24 - Rx Data Count
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.TCBState dd ? ;+28 - TCB STATE
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.TCBTimer dd ? ;+32 - TCB Timer (seconds)
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.ISS dd ? ;+36 - Initial Send Sequence
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.IRS dd ? ;+40 - Initial Receive Sequence
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.SND_UNA dd ? ;+44 - Sequence number of unack'ed sent packets
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.SND_NXT dd ? ;+48 - Next send sequence number to use
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.SND_WND dd ? ;+52 - Send window
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.RCV_NXT dd ? ;+56 - Next receive sequence number to use
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.RCV_WND dd ? ;+60 - Receive window
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.SEG_LEN dd ? ;+64 - Segment length
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.SEG_WND dd ? ;+68 - Segment window
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.wndsizeTimer dd ? ;+72 - Retransmit queue # NOW WINDOW SIZE TIMER
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.rxData dd ? ;+76 - receive data buffer here
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}
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virtual at 0
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SOCKET SOCKET
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end virtual
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; simple macro calcing real memory address of SOCKET struct by socket's
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;macro Index2RealAddr reg
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;{
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; shl reg, 12
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; add reg, sockets
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;}
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;Constants
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; current socket statuses
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SOCK_EMPTY = 0 ; socket not in use
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SOCK_OPEN = 1 ; open issued, but no data sent
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; TCP opening modes
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SOCKET_PASSIVE equ 0
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SOCKET_ACTIVE equ 1
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proc net_socket_alloc stdcall uses ebx ecx edx edi
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stdcall kernel_alloc, SOCKETBUFFSIZE
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DEBUGF 1, "K : net_socket_alloc (0x%x)\n", eax
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or eax, eax
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jz .exit
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push eax
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mov edi, eax
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mov ecx, SOCKETBUFFSIZE / 4
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cld
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xor eax, eax
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rep stosd
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pop eax
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mov ebx, net_sockets
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push [ebx + SOCKET.NextPtr]
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mov [ebx + SOCKET.NextPtr], eax
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mov [eax + SOCKET.PrevPtr], ebx
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pop ebx
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mov [eax + SOCKET.NextPtr], ebx
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or ebx, ebx
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jz @f
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mov [ebx + SOCKET.PrevPtr], eax
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@@: mov ebx, [TASK_BASE]
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mov ebx, [ebx + TASKDATA.pid]
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mov [eax + SOCKET.PID], ebx
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.exit:
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ret
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endp
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proc net_socket_free stdcall uses ebx ecx edx, sock:DWORD
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mov eax, [sock]
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DEBUGF 1, "K : net_socket_free (0x%x)\n", eax
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or eax, eax
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jz .error
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mov ebx, net_sockets
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mov ecx, [TASK_BASE]
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mov ecx, [ecx + TASKDATA.pid]
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.next_socket:
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mov ebx, [ebx + SOCKET.NextPtr]
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or ebx, ebx
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jz .error
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cmp ebx, eax
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jne .next_socket
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;cmp [ebx + SOCKET.PID], ecx
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;jne .next_socket
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mov ebx, [eax + SOCKET.NextPtr]
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mov eax, [eax + SOCKET.PrevPtr]
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mov [eax + SOCKET.NextPtr], ebx
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or ebx, ebx
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jz @f
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mov [ebx + SOCKET.PrevPtr], eax
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@@: stdcall kernel_free, [sock]
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ret
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.error:
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DEBUGF 1, "K : failed\n"
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ret
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endp
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proc net_socket_num_to_addr stdcall uses ebx ecx, x:DWORD
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; FIXME: do real transform
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mov eax, [x]
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mov ebx, net_sockets
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mov ecx, [TASK_BASE]
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mov ecx, [ecx + TASKDATA.pid]
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.next_socket:
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mov ebx, [ebx + SOCKET.NextPtr]
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or ebx, ebx
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jz .error
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cmp ebx, eax
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jne .next_socket
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;cmp [ebx + SOCKET.PID], ecx
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;jne .next_socket
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ret
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.error:
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xor eax, eax
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ret
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endp
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proc net_socket_addr_to_num stdcall uses ebx ecx, x:DWORD
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; FIXME: do real transform
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mov eax, [x]
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mov ebx, net_sockets
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mov ecx, [TASK_BASE]
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mov ecx, [ecx + TASKDATA.pid]
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.next_socket:
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mov ebx, [ebx + SOCKET.NextPtr]
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or ebx, ebx
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jz .error
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cmp ebx, eax
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jne .next_socket
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;cmp [ebx + SOCKET.PID], ecx
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;jne .next_socket
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ret
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.error:
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xor eax, eax
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ret
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endp
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;***************************************************************************
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; Function
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; is_localport_unused
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;
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; Description
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; scans through all the active sockets , looking to see if the
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; port number specified in bx is in use as a localport number.
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; This is useful when you want a to generate a unique local port
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; number.
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; On return, eax = 1 for free, 0 for in use
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;
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;***************************************************************************
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proc is_localport_unused stdcall
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xchg bl, bh
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xor eax, eax ; Assume the return value is 'free'
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inc al
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mov edx, net_sockets
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.next_socket:
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mov edx, [edx + SOCKET.NextPtr]
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or edx, edx
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jz .exit
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cmp [edx + SOCKET.LocalPort], bx
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jne .next_socket ; Return back if the port is not occupied
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dec al ; return 'in use'
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.exit:
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ret
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endp
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;***************************************************************************
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; Function
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; socket_open
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;
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; Description
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; find a free socket
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; local port in ebx
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; remote port in ecx
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; remote ip in edx
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; return socket # in eax, -1 if none available
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;
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;***************************************************************************
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proc socket_open stdcall
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call net_socket_alloc
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or eax, eax
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jz .error
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DEBUGF 1, "K : socket_open (0x%x)\n", eax
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push eax
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mov [eax + SOCKET.Status], SOCK_OPEN
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xchg bh, bl
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mov [eax + SOCKET.LocalPort], bx
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xchg ch, cl
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mov [eax + SOCKET.RemotePort], cx
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mov ebx, [stack_ip]
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mov [eax + SOCKET.LocalIP], ebx
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mov [eax + SOCKET.RemoteIP], edx
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;pop eax ; Get the socket number back, so we can return it
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stdcall net_socket_addr_to_num
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ret
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.error:
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DEBUGF 1, "K : socket_open (fail)\n"
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or eax, -1
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ret
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endp
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;***************************************************************************
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; Function
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; socket_open_tcp
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;
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; Description
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; Opens a TCP socket in PASSIVE or ACTIVE mode
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; find a free socket
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; local port in ebx ( intel format )
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; remote port in ecx ( intel format )
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; remote ip in edx ( in Internet byte order )
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; Socket open mode in esi ( SOCKET_PASSIVE or SOCKET_ACTIVE )
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; return socket # in eax, -1 if none available
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;
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;***************************************************************************
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proc socket_open_tcp stdcall
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local sockAddr dd ?
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cmp esi, SOCKET_PASSIVE
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jne .skip_port_check
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push ebx
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mov eax, ebx
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xchg al, ah
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mov ebx, net_sockets
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.next_socket:
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mov ebx, [ebx + SOCKET.NextPtr]
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or ebx, ebx
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jz .last_socket
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cmp [ebx + SOCKET.TCBState], TCB_LISTEN
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jne .next_socket
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cmp [ebx + SOCKET.LocalPort], ax
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jne .next_socket
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xchg al, ah
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DEBUGF 1, "K : error: port %u is listened by 0x%x\n", ax, ebx
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pop ebx
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jmp .error
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.last_socket:
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pop ebx
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.skip_port_check:
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call net_socket_alloc
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or eax, eax
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jz .error
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DEBUGF 1, "K : socket_open_tcp (0x%x)\n", eax
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mov [sockAddr], eax
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; TODO - check this works!
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;xxx: already 0 (intialized by net_socket_alloc)
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;mov [eax + SOCKET.wndsizeTimer], 0 ; Reset the window timer.
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xchg bh, bl
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mov [eax + SOCKET.LocalPort], bx
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xchg ch, cl
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mov [eax + SOCKET.RemotePort], cx
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mov [eax + SOCKET.OrigRemotePort], cx
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mov ebx, [stack_ip]
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mov [eax + SOCKET.LocalIP], ebx
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mov [eax + SOCKET.RemoteIP], edx
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mov [eax + SOCKET.OrigRemoteIP], edx
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mov ebx, TCB_LISTEN
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cmp esi, SOCKET_PASSIVE
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je @f
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mov ebx, TCB_SYN_SENT
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@@: mov [eax + SOCKET.TCBState], ebx ; Indicate the state of the TCB
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cmp ebx, TCB_LISTEN
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je .exit
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; Now, if we are in active mode, then we have to send a SYN to the specified remote port
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mov eax, EMPTY_QUEUE
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call dequeue
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cmp ax, NO_BUFFER
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je .exit
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push eax
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mov bl, TH_SYN
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xor ecx, ecx
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stdcall build_tcp_packet, [sockAddr]
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mov eax, NET1OUT_QUEUE
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mov edx, [stack_ip]
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mov ecx, [sockAddr]
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cmp edx, [ecx + SOCKET.RemoteIP]
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jne .not_local
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mov eax, IPIN_QUEUE
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.not_local:
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; Send it.
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pop ebx
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call queue
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mov esi, [sockAddr]
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; increment SND.NXT in socket
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add esi, SOCKET.SND_NXT
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call inc_inet_esi
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.exit:
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mov ebx, [sockAddr]
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mov [ebx + SOCKET.Status], SOCK_OPEN
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;pop eax ; Get the socket number back, so we can return it
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stdcall net_socket_addr_to_num, ebx
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ret
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.error:
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DEBUGF 1, "K : socket_open_tcp (fail)\n"
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or eax, -1
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ret
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endp
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;***************************************************************************
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; Function
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; socket_close
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;
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; Description
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; socket # in ebx
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; returns 0 for ok, -1 for socket not open (fail)
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;
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;***************************************************************************
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proc socket_close stdcall
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DEBUGF 1, "K : socket_close (0x%x)\n", ebx
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stdcall net_socket_num_to_addr, ebx
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or eax, eax
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jz .error
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cmp [eax + SOCKET.Status], dword SOCK_EMPTY
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jz .error
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; Clear the socket varaibles
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stdcall net_socket_free, eax
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; mov edi, eax
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; xor eax, eax
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; mov ecx, SOCKETHEADERSIZE
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; cld
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; rep stosb
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xor eax, eax
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ret
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.error:
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DEBUGF 1, "K : socket_close (fail)\n"
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or eax, -1
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ret
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endp
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;***************************************************************************
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; Function
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; socket_close_tcp
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;
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; Description
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; socket # in ebx
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; returns 0 for ok, -1 for socket not open (fail)
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;
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;***************************************************************************
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proc socket_close_tcp stdcall
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local sockAddr dd ?
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DEBUGF 1, "K : socket_close_tcp (0x%x)\n", ebx
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; first, remove any resend entries
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pusha
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mov esi, resendQ
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mov ecx, 0
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.next_resendq:
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cmp ecx, NUMRESENDENTRIES
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je .last_resendq ; None left
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;cmp [esi], bl ; XTODO: bl -> ebx
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cmp [esi + 4], ebx
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je @f ; found one
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inc ecx
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add esi, 8
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jmp .next_resendq
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;@@: mov byte[esi], 0xff ; XTODO: 0xff -> 0
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@@: mov dword[esi + 4], 0
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inc ecx
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add esi, 8
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jmp .next_resendq
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.last_resendq:
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popa
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stdcall net_socket_num_to_addr, ebx
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or eax, eax
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jz .error
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mov ebx, eax
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mov [sockAddr], eax
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cmp [ebx + SOCKET.Status], SOCK_EMPTY
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je .error
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cmp [ebx + SOCKET.TCBState], TCB_LISTEN ;xxx
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je .destroy_tcb ;xxx
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cmp [ebx + SOCKET.TCBState], TCB_SYN_SENT ;xxx
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je .destroy_tcb ;xxx
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; Now construct the response, and queue for sending by IP
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mov eax, EMPTY_QUEUE
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call dequeue
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cmp ax, NO_BUFFER
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je .error
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push eax
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;xxx mov bl, TH_FIN + TH_ACK
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mov bl, TH_FIN ;xxx
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xor ecx, ecx
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xor esi, esi
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stdcall build_tcp_packet, [sockAddr]
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mov ebx, [sockAddr]
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|
; increament SND.NXT in socket
|
|
lea esi, [ebx + SOCKET.SND_NXT]
|
|
call inc_inet_esi
|
|
|
|
; Get the socket state
|
|
mov eax, [ebx + SOCKET.TCBState]
|
|
;xxx cmp eax, TCB_LISTEN
|
|
;xxx je .destroy_tcb
|
|
;xxx cmp eax, TCB_SYN_SENT
|
|
;xxx je .destroy_tcb
|
|
cmp eax, TCB_SYN_RECEIVED
|
|
je .fin_wait_1
|
|
cmp eax, TCB_ESTABLISHED
|
|
je .fin_wait_1
|
|
|
|
; assume CLOSE WAIT
|
|
; Send a fin, then enter last-ack state
|
|
; TODO: check if it's really a TCB_CLOSE_WAIT
|
|
mov [ebx + SOCKET.TCBState], TCB_LAST_ACK
|
|
jmp .send
|
|
|
|
.fin_wait_1:
|
|
; Send a fin, then enter finwait2 state
|
|
mov [ebx + SOCKET.TCBState], TCB_FIN_WAIT_1
|
|
|
|
.send:
|
|
mov eax, NET1OUT_QUEUE
|
|
mov edx, [stack_ip]
|
|
mov ecx, [sockAddr]
|
|
cmp edx, [ecx + SOCKET.RemoteIP]
|
|
jne .not_local
|
|
mov eax, IPIN_QUEUE
|
|
|
|
.not_local:
|
|
; Send it.
|
|
pop ebx
|
|
call queue
|
|
jmp .exit
|
|
|
|
.destroy_tcb:
|
|
;xxx pop eax
|
|
|
|
; Clear the socket variables
|
|
;xxx stdcall net_socket_free, [sockAddr]
|
|
stdcall net_socket_free, ebx
|
|
|
|
.exit:
|
|
xor eax, eax
|
|
ret
|
|
|
|
.error:
|
|
DEBUGF 1, "K : socket_close_tcp (fail)\n"
|
|
or eax, -1
|
|
ret
|
|
endp
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; socket_poll
|
|
;
|
|
; Description
|
|
; socket # in ebx
|
|
; returns count in eax.
|
|
;
|
|
;***************************************************************************
|
|
proc socket_poll stdcall
|
|
; DEBUGF 1, "socket_poll(0x%x)\n", ebx
|
|
stdcall net_socket_num_to_addr, ebx
|
|
or eax, eax
|
|
jz .error
|
|
|
|
mov eax, [eax + SOCKET.rxDataCount]
|
|
ret
|
|
|
|
.error:
|
|
xor eax, eax
|
|
ret
|
|
endp
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; socket_status
|
|
;
|
|
; Description
|
|
; socket # in ebx
|
|
; returns TCB state in eax.
|
|
;
|
|
;***************************************************************************
|
|
proc socket_status stdcall
|
|
;; DEBUGF 1, "socket_status(0x%x)\n", ebx
|
|
stdcall net_socket_num_to_addr, ebx
|
|
or eax, eax
|
|
jz .error
|
|
|
|
mov eax, [eax + SOCKET.TCBState]
|
|
ret
|
|
|
|
.error:
|
|
xor eax, eax
|
|
ret
|
|
endp
|
|
|
|
; Index2RealAddr ebx
|
|
; mov eax, [ebx + SOCKET.TCBState]
|
|
;
|
|
; ret
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; socket_read
|
|
;
|
|
; Description
|
|
; socket # in ebx
|
|
; returns # of bytes remaining in eax, data in bl
|
|
;
|
|
;***************************************************************************
|
|
proc socket_read stdcall
|
|
; DEBUGF 1, "socket_read(0x%x)\n", ebx
|
|
stdcall net_socket_num_to_addr, ebx
|
|
or eax, eax
|
|
jz .error
|
|
|
|
mov ebx, eax
|
|
mov eax, [ebx + SOCKET.rxDataCount] ; get count of bytes
|
|
test eax, eax
|
|
jz .error
|
|
|
|
dec eax
|
|
mov esi, ebx ; esi is address of socket
|
|
mov [ebx + SOCKET.rxDataCount], eax ; store new count
|
|
movzx ebx, byte[ebx + SOCKET.rxData] ; get the byte
|
|
|
|
mov ecx, SOCKETBUFFSIZE - SOCKET.rxData - 1
|
|
lea edi, [esi + SOCKET.rxData]
|
|
lea esi, [edi + 1]
|
|
cld
|
|
push ecx
|
|
shr ecx, 2
|
|
rep movsd
|
|
pop ecx
|
|
and ecx, 3
|
|
rep movsb
|
|
|
|
ret
|
|
|
|
.error:
|
|
xor eax, eax
|
|
xor ebx, ebx
|
|
ret
|
|
endp
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; socket_read_packet
|
|
;
|
|
; Description
|
|
; socket # in ebx
|
|
; datapointer # in ecx
|
|
; buffer size in edx
|
|
; returns # of bytes copied in eax
|
|
;
|
|
;***************************************************************************
|
|
proc socket_read_packet stdcall
|
|
; DEBUGF 1, "socket_read_packet(0x%x)\n", ebx
|
|
stdcall net_socket_num_to_addr, ebx ; get real socket address
|
|
or eax, eax
|
|
jz .error
|
|
|
|
mov ebx, eax
|
|
mov eax, [ebx + SOCKET.rxDataCount] ; get count of bytes
|
|
test eax, eax ; if count of bytes is zero..
|
|
jz .exit ; exit function (eax will be zero)
|
|
|
|
test edx, edx ; if buffer size is zero, copy all data
|
|
jz .copy_all_bytes
|
|
cmp edx, eax ; if buffer size is larger then the bytes of data, copy all data
|
|
jge .copy_all_bytes
|
|
|
|
sub eax, edx ; store new count (data bytes in buffer - bytes we're about to copy)
|
|
mov [ebx + SOCKET.rxDataCount], eax ;
|
|
push eax
|
|
mov eax, edx ; number of bytes we want to copy must be in eax
|
|
call .start_copy ; copy to the application
|
|
|
|
mov esi, ebx ; now we're going to copy the remaining bytes to the beginning
|
|
add esi, SOCKET.rxData ; we dont need to copy the header
|
|
mov edi, esi ; edi is where we're going to copy to
|
|
add esi, edx ; esi is from where we copy
|
|
pop ecx ; count of bytes we have left
|
|
push ecx ; push it again so we can re-use it later
|
|
shr ecx, 2 ; divide eax by 4
|
|
cld
|
|
rep movsd ; copy all full dwords
|
|
pop ecx
|
|
and ecx, 3
|
|
rep movsb ; copy remaining bytes
|
|
|
|
.exit:
|
|
ret ; at last, exit
|
|
|
|
.error:
|
|
xor eax, eax
|
|
ret
|
|
|
|
.copy_all_bytes:
|
|
xor esi, esi
|
|
mov [ebx + SOCKET.rxDataCount], esi ; store new count (zero)
|
|
call .start_copy
|
|
ret
|
|
|
|
.start_copy:
|
|
mov edi, ecx
|
|
mov esi, ebx
|
|
add esi, SOCKET.rxData ; we dont need to copy the header
|
|
mov ecx, eax ; eax is count of bytes
|
|
push ecx
|
|
shr ecx, 2 ; divide eax by 4
|
|
cld ; copy all full dwords
|
|
rep movsd
|
|
pop ecx
|
|
and ecx, 3
|
|
rep movsb ; copy the rest bytes
|
|
retn ; exit, or go back to shift remaining bytes if any
|
|
endp
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; socket_write
|
|
;
|
|
; Description
|
|
; socket in ebx
|
|
; # of bytes to write in ecx
|
|
; pointer to data in edx
|
|
; returns 0 in eax ok, -1 == failed ( invalid socket, or
|
|
; could not queue IP packet )
|
|
;
|
|
;***************************************************************************
|
|
proc socket_write stdcall
|
|
; DEBUGF 1, "socket_write(0x%x)\n", ebx
|
|
stdcall net_socket_num_to_addr, ebx ; get real socket address
|
|
or eax, eax
|
|
jz .error
|
|
|
|
mov ebx, eax
|
|
|
|
; If the socket is invalid, return with an error code
|
|
cmp [ebx + SOCKET.Status], SOCK_EMPTY
|
|
je .error
|
|
|
|
mov eax, EMPTY_QUEUE
|
|
call dequeue
|
|
cmp ax, NO_BUFFER
|
|
je .error
|
|
|
|
; Save the queue entry number
|
|
push eax
|
|
|
|
; save the pointers to the data buffer & size
|
|
push edx
|
|
push ecx
|
|
|
|
; convert buffer pointer eax to the absolute address
|
|
mov ecx, IPBUFFSIZE
|
|
mul ecx
|
|
add eax, IPbuffs
|
|
|
|
mov edx, eax
|
|
|
|
; So, ebx holds the socket ptr, edx holds the IPbuffer ptr
|
|
|
|
; Fill in the IP header (some data is in the socket descriptor)
|
|
mov eax, [ebx + SOCKET.LocalIP]
|
|
mov [edx + IP_PACKET.SourceAddress], eax
|
|
mov eax, [ebx + SOCKET.RemoteIP]
|
|
mov [edx + IP_PACKET.DestinationAddress], eax
|
|
|
|
mov [edx + IP_PACKET.VersionAndIHL], 0x45
|
|
mov [edx + IP_PACKET.TypeOfService], 0
|
|
|
|
pop eax ; Get the UDP data length
|
|
push eax
|
|
|
|
add eax, 20 + 8 ; add IP header and UDP header lengths
|
|
xchg al, ah
|
|
mov [edx + IP_PACKET.TotalLength], ax
|
|
xor eax, eax
|
|
mov [edx + IP_PACKET.Identification], ax
|
|
mov [edx + IP_PACKET.FlagsAndFragmentOffset], 0x0040
|
|
mov [edx + IP_PACKET.TimeToLive], 0x20
|
|
mov [edx + IP_PACKET.Protocol], PROTOCOL_UDP
|
|
|
|
; Checksum left unfilled
|
|
mov [edx + IP_PACKET.HeaderChecksum], ax
|
|
|
|
; Fill in the UDP header (some data is in the socket descriptor)
|
|
mov ax, [ebx + SOCKET.LocalPort]
|
|
mov [edx + 20 + UDP_PACKET.SourcePort], ax
|
|
|
|
mov ax, [ebx + SOCKET.RemotePort]
|
|
mov [edx + 20 + UDP_PACKET.DestinationPort], ax
|
|
|
|
pop eax
|
|
push eax
|
|
|
|
add eax, 8
|
|
xchg al, ah
|
|
mov [edx + 20 + UDP_PACKET.Length], ax
|
|
|
|
; Checksum left unfilled
|
|
xor eax, eax
|
|
mov [edx + 20 + UDP_PACKET.Checksum], ax
|
|
|
|
pop ecx ; count of bytes to send
|
|
mov ebx, ecx ; need the length later
|
|
pop eax ; get callers ptr to data to send
|
|
|
|
; Get the address of the callers data
|
|
mov edi, [TASK_BASE]
|
|
add edi, TASKDATA.mem_start
|
|
add eax, [edi]
|
|
mov esi, eax
|
|
|
|
mov edi, edx
|
|
add edi, 28
|
|
cld
|
|
rep movsb ; copy the data across
|
|
|
|
; we have edx as IPbuffer ptr.
|
|
; Fill in the UDP checksum
|
|
; First, fill in pseudoheader
|
|
mov eax, [edx + IP_PACKET.SourceAddress]
|
|
mov [pseudoHeader], eax
|
|
mov eax, [edx + IP_PACKET.DestinationAddress]
|
|
mov [pseudoHeader + 4], eax
|
|
mov word[pseudoHeader + 8], PROTOCOL_UDP shl 8 + 0 ; 0 + protocol
|
|
add ebx, 8
|
|
mov eax, ebx
|
|
xchg al, ah
|
|
mov [pseudoHeader + 10], ax
|
|
|
|
mov eax, pseudoHeader
|
|
mov [checkAdd1], eax
|
|
mov [checkSize1], word 12
|
|
mov eax, edx
|
|
add eax, 20
|
|
mov [checkAdd2], eax
|
|
mov eax, ebx
|
|
mov [checkSize2], ax ; was eax!! mjh 8/7/02
|
|
|
|
call checksum
|
|
|
|
; store it in the UDP checksum ( in the correct order! )
|
|
mov ax, [checkResult]
|
|
|
|
; If the UDP checksum computes to 0, we must make it 0xffff
|
|
; (0 is reserved for 'not used')
|
|
test ax, ax
|
|
jnz @f
|
|
mov ax, 0xffff
|
|
|
|
@@: xchg al, ah
|
|
mov [edx + 20 + UDP_PACKET.Checksum], ax
|
|
|
|
; Fill in the IP header checksum
|
|
GET_IHL ecx,edx ; get IP-Header length
|
|
stdcall checksum_jb,edx,ecx ; buf_ptr, buf_size
|
|
xchg al, ah
|
|
mov [edx + IP_PACKET.HeaderChecksum], ax
|
|
|
|
; Check destination IP address.
|
|
; If it is the local host IP, route it back to IP_RX
|
|
|
|
pop ebx
|
|
|
|
mov eax, NET1OUT_QUEUE
|
|
mov ecx, [edx + SOCKET.RemoteIP]
|
|
mov edx, [stack_ip]
|
|
cmp edx, ecx
|
|
jne .not_local
|
|
mov eax, IPIN_QUEUE
|
|
|
|
.not_local:
|
|
; Send it.
|
|
call queue
|
|
|
|
xor eax, eax
|
|
ret
|
|
|
|
.error:
|
|
or eax, -1
|
|
ret
|
|
endp
|
|
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; socket_write_tcp
|
|
;
|
|
; Description
|
|
; socket in ebx
|
|
; # of bytes to write in ecx
|
|
; pointer to data in edx
|
|
; returns 0 in eax ok, -1 == failed ( invalid socket, or
|
|
; could not queue IP packet )
|
|
;
|
|
;***************************************************************************
|
|
proc socket_write_tcp stdcall
|
|
local sockAddr dd ?
|
|
|
|
; DEBUGF 1, "socket_write_tcp(0x%x)\n", ebx
|
|
stdcall net_socket_num_to_addr, ebx
|
|
or eax, eax
|
|
jz .error
|
|
|
|
mov ebx, eax
|
|
mov [sockAddr], ebx
|
|
|
|
; If the socket is invalid, return with an error code
|
|
cmp [ebx + SOCKET.Status], SOCK_EMPTY
|
|
je .error
|
|
|
|
; If the sockets window timer is nonzero, do not queue packet
|
|
; TODO - done
|
|
cmp [ebx + SOCKET.wndsizeTimer], 0
|
|
jne .error
|
|
|
|
mov eax, EMPTY_QUEUE
|
|
call dequeue
|
|
cmp ax, NO_BUFFER
|
|
je .error
|
|
|
|
push eax
|
|
|
|
; Get the address of the callers data
|
|
mov edi, [TASK_BASE]
|
|
add edi, TASKDATA.mem_start
|
|
add edx, [edi]
|
|
mov esi, edx
|
|
|
|
pop eax
|
|
push eax
|
|
|
|
push ecx
|
|
mov bl, TH_ACK
|
|
stdcall build_tcp_packet, [sockAddr]
|
|
pop ecx
|
|
|
|
; Check destination IP address.
|
|
; If it is the local host IP, route it back to IP_RX
|
|
|
|
pop ebx
|
|
push ecx
|
|
|
|
mov eax, NET1OUT_QUEUE
|
|
mov edx, [stack_ip]
|
|
mov ecx, [sockAddr]
|
|
cmp edx, [ecx + SOCKET.RemoteIP]
|
|
jne .not_local
|
|
mov eax, IPIN_QUEUE
|
|
|
|
.not_local:
|
|
pop ecx
|
|
push ebx ; save ipbuffer number
|
|
|
|
call queue
|
|
|
|
mov esi, [sockAddr]
|
|
|
|
; increament SND.NXT in socket
|
|
; Amount to increment by is in ecx
|
|
add esi, SOCKET.SND_NXT
|
|
call add_inet_esi
|
|
|
|
pop ebx
|
|
|
|
; Copy the IP buffer to a resend queue
|
|
; If there isn't one, dont worry about it for now
|
|
mov esi, resendQ
|
|
mov ecx, 0
|
|
|
|
.next_resendq:
|
|
cmp ecx, NUMRESENDENTRIES
|
|
je .exit ; None found
|
|
;cmp byte[esi], 0xff ; XTODO: 0xff -> 0
|
|
cmp dword[esi + 4], 0
|
|
je @f ; found one
|
|
inc ecx
|
|
add esi, 8
|
|
jmp .next_resendq
|
|
|
|
@@: push ebx
|
|
|
|
; OK, we have a buffer descriptor ptr in esi.
|
|
; resend entry # in ecx
|
|
; Populate it
|
|
; socket #
|
|
; retries count
|
|
; retry time
|
|
; fill IP buffer associated with this descriptor
|
|
|
|
stdcall net_socket_addr_to_num, [sockAddr]
|
|
;mov [esi], al ; XTODO: al -> eax
|
|
mov [esi + 4], eax
|
|
mov byte[esi + 1], TCP_RETRIES
|
|
mov word[esi + 2], TCP_TIMEOUT
|
|
|
|
inc ecx
|
|
; Now get buffer location, and copy buffer across. argh! more copying,,
|
|
mov edi, resendBuffer - IPBUFFSIZE
|
|
|
|
@@: add edi, IPBUFFSIZE
|
|
loop @b
|
|
|
|
; we have dest buffer location in edi
|
|
pop eax
|
|
; convert source buffer pointer eax to the absolute address
|
|
mov ecx, IPBUFFSIZE
|
|
mul ecx
|
|
add eax, IPbuffs
|
|
mov esi, eax
|
|
|
|
; do copy
|
|
mov ecx, IPBUFFSIZE
|
|
cld
|
|
rep movsb
|
|
|
|
.exit:
|
|
xor eax, eax
|
|
ret
|
|
|
|
.error:
|
|
or eax, -1
|
|
ret
|
|
endp
|