forked from KolibriOS/kolibrios
1601 lines
31 KiB
PHP
1601 lines
31 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2010. 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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;; Written by hidnplayr@kolibrios.org, ;;
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;; and Clevermouse. ;;
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;; ;;
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;; Based on code by mike.dld ;;
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;; ;;
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;; GNU GENERAL PUBLIC LICENSE ;;
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;; Version 2, June 1991 ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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virtual at 0
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SOCKET:
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.NextPtr dd ? ; pointer to next socket in list
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.PrevPtr dd ? ; pointer to previous socket in list
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.Number dd ? ; socket number
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.lock dd ? ; lock mutex
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.PID dd ? ; application process id
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.Domain dd ? ; INET/UNIX/..
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.Type dd ? ; RAW/UDP/TCP/...
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.Protocol dd ? ; ICMP/IPv4/ARP/
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.errorcode dd ?
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.options dd ?
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.state dd ?
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.end:
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end virtual
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virtual at SOCKET.end
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IP_SOCKET:
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.LocalIP dd ?
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rd 3 ; for IPv6 addresses
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.RemoteIP dd ?
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rd 3 ; for IPv6 addresses
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.end:
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end virtual
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virtual at IP_SOCKET.end
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TCP_SOCKET:
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.LocalPort dw ? ; In INET byte order
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.RemotePort dw ? ; In INET byte order
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.backlog dw ? ; Backlog
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.backlog_cur dw ? ; current size of queue for un-accept-ed connections
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.OrigRemoteIP dd ? ; original remote IP address (used to reset to LISTEN state)
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.OrigRemotePort dw ? ; original remote port (used to reset to LISTEN state)
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.t_state dd ? ; TCB state
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.t_rxtshift dd ?
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.t_rxtcur dd ?
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.t_dupacks dd ?
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.t_maxseg dd ?
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.t_force dd ?
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.t_flags dd ?
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;---------------
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; RFC783 page 21
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; send sequence
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.SND_UNA dd ? ; sequence number of unack'ed sent Packets
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.SND_NXT dd ? ; next send sequence number to use
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.SND_UP dd ?
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.SND_WL1 dd ? ; window minus one
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.SND_WL2 dd ? ;
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.ISS dd ? ; initial send sequence number
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.SND_WND dd ? ; send window
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; receive sequence
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.RCV_WND dw ? ; receive window
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.RCV_NXT dd ? ; next receive sequence number to use
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.RCV_UP dd ?
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.IRS dd ? ; initial receive sequence number
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;---------------------
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; Additional variables
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; receive variables
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.RCV_ADV dd ?
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; retransmit variables
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.SND_MAX dd ?
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; congestion control
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.SND_CWND dd ?
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.SND_SSTHRESH dd ?
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;----------------------
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; Transmit timing stuff
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.t_idle dd ?
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.t_rtt dd ?
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.t_rtseq dd ?
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.t_srtt dd ?
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.t_rttvar dd ?
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.t_rttmin dd ?
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.max_sndwnd dd ?
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;-----------------
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; Out-of-band data
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.t_oobflags dd ?
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.t_iobc dd ?
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.t_softerror dd ?
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;---------
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; RFC 1323
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.SND_SCALE db ? ; Scale factor
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.RCV_SCALE db ?
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.request_r_scale db ?
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.requested_s_scale dd ?
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.ts_recent dd ?
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.ts_recent_age dd ?
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.last_ack_sent dd ?
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;-------
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; Timers
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.timer_retransmission dw ? ; rexmt
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.timer_ack dw ?
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.timer_persist dw ?
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.timer_keepalive dw ? ; keepalive/syn timeout
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.timer_timed_wait dw ? ; also used as 2msl timer
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.end:
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end virtual
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virtual at IP_SOCKET.end
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UDP_SOCKET:
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.LocalPort dw ? ; In INET byte order
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.RemotePort dw ? ; In INET byte order
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.firstpacket db ?
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.end:
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end virtual
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virtual at IP_SOCKET.end
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ICMP_SOCKET:
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.Identifier dw ? ;
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.end:
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end virtual
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struc RING_BUFFER {
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.start_ptr dd ? ; Pointer to start of buffer
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.end_ptr dd ? ; pointer to end of buffer
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.read_ptr dd ? ; Read pointer
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.write_ptr dd ? ; Write pointer
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.size dd ? ; Number of bytes buffered
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.end:
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}
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virtual at 0
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RING_BUFFER RING_BUFFER
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end virtual
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virtual at TCP_SOCKET.end
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STREAM_SOCKET:
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.rcv rd RING_BUFFER.end/4
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.snd rd RING_BUFFER.end/4
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.end:
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end virtual
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struct socket_queue_entry
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.data_ptr dd ?
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.buf_ptr dd ?
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.data_size dd ?
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.size:
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ends
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SOCKETBUFFSIZE equ 4096 ; in bytes
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SOCKET_QUEUE_SIZE equ 10 ; maximum number ofincoming packets queued for 1 socket
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; the incoming packet queue for sockets is placed in the socket struct itself, at this location from start
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SOCKET_QUEUE_LOCATION equ SOCKETBUFFSIZE - SOCKET_QUEUE_SIZE*socket_queue_entry.size - queue.data
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uglobal
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net_sockets rd 4
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last_UDP_port dw ? ; These values give the number of the last used ephemeral port
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last_TCP_port dw ? ;
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endg
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;-----------------------------------------------------------------
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;
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; SOCKET_init
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;
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;-----------------------------------------------------------------
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macro SOCKET_init {
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xor eax, eax
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mov edi, net_sockets
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mov ecx, 4
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rep stosd
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@@:
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pseudo_random eax
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cmp ax, MIN_EPHEMERAL_PORT
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jl @r
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cmp ax, MAX_EPHEMERAL_PORT
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jg @r
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mov [last_UDP_port], ax
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@@:
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pseudo_random eax
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cmp ax, MIN_EPHEMERAL_PORT
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jl @r
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cmp ax, MAX_EPHEMERAL_PORT
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jg @r
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mov [last_TCP_port], ax
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}
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;-----------------------------------------------------------------
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;
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; Socket API (function 74)
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;
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;-----------------------------------------------------------------
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align 4
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sys_socket:
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cmp ebx, 8 ; highest possible number
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jg @f
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lea ebx, [sock_sysfn_table + 4*ebx]
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jmp dword [ebx]
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@@:
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cmp ebx, 255
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jz SOCKET_debug
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s_error:
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DEBUGF 1,"socket error\n"
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mov dword [esp+32], -1
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ret
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sock_sysfn_table:
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dd SOCKET_open ; 0
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dd SOCKET_close ; 1
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dd SOCKET_bind ; 2
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dd SOCKET_listen ; 3
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dd SOCKET_connect ; 4
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dd SOCKET_accept ; 5
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dd SOCKET_send ; 6
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dd SOCKET_receive ; 7
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dd SOCKET_get_opt ; 8
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; dd SOCKET_set_opt ; 9
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;-----------------------------------------------------------------
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;
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; SOCKET_open
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;
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; IN: domain in ecx
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; type in edx
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; protocol in esi
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; OUT: eax is socket num, -1 on error
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;
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;-----------------------------------------------------------------
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align 4
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SOCKET_open:
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DEBUGF 1,"socket_open: domain: %u, type: %u protocol: %x\n", ecx, edx, esi
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call SOCKET_alloc
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jz s_error
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mov [eax + SOCKET.Domain], ecx
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mov [eax + SOCKET.Type], edx
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mov [eax + SOCKET.Protocol], esi
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mov [esp+32], edi
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cmp ecx, AF_INET4
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jnz .no_stream
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push [IP_LIST] ;;;;
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pop [eax + IP_SOCKET.LocalIP] ;;;;
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cmp edx, IP_PROTO_TCP
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jnz .no_stream
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mov ebx, eax
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lea eax, [ebx + STREAM_SOCKET.snd]
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call SOCKET_ring_create
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lea eax, [ebx + STREAM_SOCKET.rcv]
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call SOCKET_ring_create
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ret
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.no_stream:
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push edi
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init_queue (eax + SOCKET_QUEUE_LOCATION)
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pop edi
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ret
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;-----------------------------------------------------------------
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;
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; SOCKET_bind
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;
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; IN: socket number in ecx
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; pointer to sockaddr struct in edx
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; length of that struct in esi
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; OUT: 0 on success
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;
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;-----------------------------------------------------------------
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align 4
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SOCKET_bind:
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DEBUGF 1,"socket_bind: socknum: %u sockaddr: %x, length: %u\n", ecx, edx, esi
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call SOCKET_num_to_ptr
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jz s_error
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cmp esi, 2
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jl s_error
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cmp word [edx], AF_INET4
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je .af_inet4
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cmp word [edx], AF_UNIX
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je .af_unix
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jmp s_error
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.af_unix:
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; TODO: write code here
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mov dword [esp+32], 0
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ret
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.af_inet4:
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DEBUGF 1,"af_inet4\n"
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cmp esi, 6
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jl s_error
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mov ecx, [eax + SOCKET.Type]
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mov bx, word [edx + 2]
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test bx, bx
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jz .find_free
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call SOCKET_check_port
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; test bx, bx
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jz s_error
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jmp .got_port
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.find_free:
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call SOCKET_find_port
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; test bx, bx
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jz s_error
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.got_port:
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DEBUGF 1,"using local port: %u\n", bx
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mov word [eax + UDP_SOCKET.LocalPort], bx
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DEBUGF 1,"local ip: %u.%u.%u.%u\n",\
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[eax + IP_SOCKET.LocalIP + 0]:1,[eax + IP_SOCKET.LocalIP + 1]:1,\
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[eax + IP_SOCKET.LocalIP + 2]:1,[eax + IP_SOCKET.LocalIP + 3]:1
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mov dword [esp+32], 0
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ret
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;-----------------------------------------------------------------
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;
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; SOCKET_connect
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;
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; IN: socket number in ecx
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; pointer to sockaddr struct in edx
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; length of that struct in esi
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; OUT: 0 on success
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;
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;-----------------------------------------------------------------
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align 4
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SOCKET_connect:
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DEBUGF 1,"socket_connect: socknum: %u sockaddr: %x, length: %u\n", ecx, edx, esi
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call SOCKET_num_to_ptr
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jz s_error
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cmp esi, 8
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jl s_error
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cmp word [edx], AF_INET4
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je .af_inet4
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jmp s_error
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.af_inet4:
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cmp [eax + SOCKET.Type], IP_PROTO_UDP
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je .udp
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cmp [eax + SOCKET.Type], IP_PROTO_TCP
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je .tcp
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jmp s_error
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.udp:
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mov bx , word [edx + 2]
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mov word [eax + UDP_SOCKET.RemotePort], bx
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mov [eax + UDP_SOCKET.firstpacket], 0
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DEBUGF 1,"remote port: %u\n",bx
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mov ebx, dword [edx + 4]
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mov dword [eax + IP_SOCKET.RemoteIP], ebx
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DEBUGF 1,"remote ip: %u.%u.%u.%u\n",[edx+4]:1,[edx+5]:1,[edx+6]:1,[edx+7]:1
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mov dword [esp+32], 0
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ret
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.tcp:
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lea ebx, [eax + SOCKET.lock]
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call wait_mutex
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; fill in remote port and IP
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mov bx , word [edx + 2]
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mov [eax + TCP_SOCKET.RemotePort], bx
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DEBUGF 1,"remote port: %u\n", bx
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mov ebx, dword [edx + 4]
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mov [eax + IP_SOCKET.RemoteIP], ebx
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; check if local port and IP is ok
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cmp [eax + TCP_SOCKET.LocalPort], 0
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jne @f
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call SOCKET_find_port
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@@:
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DEBUGF 1,"local port: %u\n", [eax + TCP_SOCKET.LocalPort]:2
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;;;;;
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mov [eax + TCP_SOCKET.timer_persist], 0
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mov [eax + TCP_SOCKET.t_state], TCB_SYN_SENT
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mov ebx, [TCP_sequence_num]
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add [TCP_sequence_num], 6400
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mov [eax + TCP_SOCKET.ISS], ebx
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mov [eax + TCP_SOCKET.timer_keepalive], TCP_time_keep_init
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TCP_sendseqinit eax
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;;;; mov [ebx + TCP_SOCKET.timer_retransmission], ;; todo: create macro to set retransmission timer
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push eax
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call TCP_output
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pop eax
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mov [eax + SOCKET.lock], 0
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mov dword [esp+32], 0 ; success!
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ret
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;-----------------------------------------------------------------
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;
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; SOCKET_listen
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;
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; IN: socket number in ecx
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; backlog in edx
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; OUT: eax is socket num, -1 on error
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;
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;-----------------------------------------------------------------
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align 4
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SOCKET_listen:
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DEBUGF 1,"Socket_listen: socknum: %u backlog: %u\n", ecx, edx
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call SOCKET_num_to_ptr
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jz s_error
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cmp word [eax + SOCKET.Domain], AF_INET4
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jne s_error
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cmp [eax + SOCKET.Type], IP_PROTO_TCP
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jne s_error
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; TODO: check local port number
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cmp edx, MAX_backlog
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jle .ok
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mov edx, MAX_backlog
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.ok:
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mov [eax + TCP_SOCKET.backlog], dx
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mov [eax + TCP_SOCKET.t_state], TCB_LISTEN
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or [eax + SOCKET.options], SO_ACCEPTCON
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mov dword [esp+32], 0
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ret
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;-----------------------------------------------------------------
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;
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; SOCKET_accept
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;
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; IN: socket number in ecx
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; addr in edx
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; addrlen in esi
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; OUT: eax is socket num, -1 on error
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;
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;-----------------------------------------------------------------
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align 4
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SOCKET_accept:
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DEBUGF 1,"Socket_accept: socknum: %u sockaddr: %x, length: %u\n", ecx, edx, esi
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call SOCKET_num_to_ptr
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jz s_error
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cmp word [eax + SOCKET.Domain], AF_INET4
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je .af_inet4
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jmp s_error
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.af_inet4:
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cmp [eax + SOCKET.Type], IP_PROTO_TCP
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je .tcp
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jmp s_error
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.tcp:
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lea ebx, [eax + SOCKET.lock]
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call wait_mutex
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movzx ebx, [eax + TCP_SOCKET.backlog_cur]
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test ebx, ebx
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jz .unlock_err
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dec [eax + TCP_SOCKET.backlog_cur]
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mov eax, [eax + TCP_SOCKET.end + (ebx-1)*4]
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mov [eax + SOCKET.lock], 0
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mov dword [esp+32], 0
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call TCP_output ;;;;;
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ret
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.unlock_err:
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mov [eax + SOCKET.lock], 0
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jmp s_error
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;-----------------------------------------------------------------
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;
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; SOCKET_close
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;
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; IN: socket number in ecx
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; OUT: eax is socket num, -1 on error
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;
|
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;-----------------------------------------------------------------
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align 4
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SOCKET_close:
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|
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DEBUGF 1,"socket_close: socknum: %u\n", ecx
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|
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call SOCKET_num_to_ptr
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jz s_error
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cmp [eax + SOCKET.Domain], AF_INET4
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jne s_error
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cmp [eax + SOCKET.Type], IP_PROTO_UDP
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je .free
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cmp [eax + SOCKET.Type], IP_PROTO_ICMP
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je .free
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cmp [eax + SOCKET.Type], IP_PROTO_TCP
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je .tcp
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jmp s_error
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.tcp:
|
|
test [eax + TCP_SOCKET.t_state], TCB_SYN_RECEIVED ;;;;;;
|
|
jz .free
|
|
|
|
;;; call TCP_output
|
|
|
|
;;; mov dword [esp+32], 0
|
|
|
|
;;; ret
|
|
|
|
; state must be LISTEN, SYN_SENT, CLOSED or maybe even invalid
|
|
; so, we may destroy the socket
|
|
.free:
|
|
call SOCKET_free
|
|
mov dword [esp+32], 0
|
|
|
|
ret
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_receive
|
|
;
|
|
; IN: socket number in ecx
|
|
; addr to buffer in edx
|
|
; length of buffer in esi
|
|
; flags in edi
|
|
; OUT: eax is number of bytes copied, -1 on error
|
|
;
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_receive:
|
|
|
|
DEBUGF 1,"socket_receive: socknum: %u bufaddr: %x, buflength: %u, flags: %x\n", ecx, edx, esi, edi
|
|
|
|
call SOCKET_num_to_ptr
|
|
jz s_error
|
|
|
|
cmp [eax + SOCKET.Type], IP_PROTO_TCP ;;;;;;;;
|
|
je .tcp
|
|
|
|
mov ebx, esi
|
|
get_from_queue (eax + SOCKET_QUEUE_LOCATION),\
|
|
SOCKET_QUEUE_SIZE,\
|
|
socket_queue_entry.size,\
|
|
s_error
|
|
; destroys esi and ecx
|
|
|
|
mov edi, edx ; addr to buffer
|
|
|
|
mov ecx, [esi + socket_queue_entry.data_size]
|
|
DEBUGF 1,"Got %u bytes of data\n", ecx
|
|
|
|
cmp ecx, ebx
|
|
jle .large_enough
|
|
DEBUGF 1,"Buffer too small...\n"
|
|
jmp s_error
|
|
|
|
.large_enough:
|
|
push [esi + socket_queue_entry.buf_ptr] ; save the buffer addr so we can clear it later
|
|
mov esi, [esi + socket_queue_entry.data_ptr]
|
|
DEBUGF 1,"Source buffer: %x, real addr: %x\n", [esp], esi
|
|
mov dword[esp+32+4], ecx ; return number of bytes copied in ebx
|
|
|
|
; copy the data
|
|
shr ecx, 1
|
|
jnc .nb
|
|
movsb
|
|
.nb: shr ecx, 1
|
|
jnc .nw
|
|
movsw
|
|
.nw: test ecx, ecx
|
|
jz .nd
|
|
rep movsd
|
|
.nd:
|
|
; remove the packet ;;; TODO: only if it is empty!!
|
|
|
|
call kernel_free
|
|
ret
|
|
|
|
.tcp:
|
|
|
|
mov ecx, esi
|
|
mov edi, edx
|
|
add eax, STREAM_SOCKET.rcv
|
|
call SOCKET_ring_read
|
|
|
|
mov dword[esp+32], ecx ; return number of bytes copied in ebx
|
|
|
|
ret
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_send
|
|
;
|
|
;
|
|
; IN: socket number in ecx
|
|
; pointer to data in edx
|
|
; datalength in esi
|
|
; flags in edi
|
|
; OUT: -1 on error
|
|
;
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_send:
|
|
|
|
DEBUGF 1,"socket_send: socknum: %u sockaddr: %x, length: %u, flags: %x\n", ecx, edx, esi, edi
|
|
|
|
call SOCKET_num_to_ptr
|
|
jz s_error
|
|
|
|
cmp word [eax + SOCKET.Domain], AF_INET4
|
|
je .af_inet4
|
|
|
|
jmp s_error
|
|
|
|
.af_inet4:
|
|
DEBUGF 1,"af_inet4\n"
|
|
|
|
cmp [eax + IP_SOCKET.LocalIP], 0
|
|
jne @f
|
|
mov ebx, [IP_LIST] ;;;;
|
|
mov dword [eax + IP_SOCKET.LocalIP], ebx
|
|
@@:
|
|
|
|
cmp [eax + SOCKET.Type], IP_PROTO_TCP
|
|
je .tcp
|
|
|
|
cmp [eax + SOCKET.Type], IP_PROTO_UDP
|
|
je .udp
|
|
|
|
jmp s_error
|
|
|
|
.udp:
|
|
DEBUGF 1,"type: UDP\n"
|
|
|
|
; check if local port is valid
|
|
cmp [eax + UDP_SOCKET.LocalPort], 0
|
|
jne @f
|
|
|
|
call SOCKET_find_port
|
|
jz s_error
|
|
|
|
; Now, send the packet
|
|
@@:
|
|
mov ecx, esi
|
|
mov esi, edx
|
|
|
|
call UDP_output
|
|
|
|
mov dword [esp+32], 0
|
|
ret
|
|
|
|
.tcp:
|
|
DEBUGF 1,"type: TCP\n"
|
|
|
|
; check if local port is valid
|
|
cmp [eax + TCP_SOCKET.LocalPort], 0
|
|
jne @f
|
|
|
|
call SOCKET_find_port
|
|
jz s_error
|
|
|
|
@@:
|
|
|
|
push eax
|
|
mov ecx, esi
|
|
mov esi, edx
|
|
add eax, STREAM_SOCKET.snd
|
|
call SOCKET_ring_write
|
|
pop eax
|
|
call TCP_output
|
|
|
|
mov [esp+32], eax
|
|
ret
|
|
|
|
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_get_options
|
|
;
|
|
; IN: ecx = socket number
|
|
; edx = pointer to the options:
|
|
; dd level, optname, optval, optlen
|
|
; OUT: -1 on error
|
|
;
|
|
; At moment, uses only pseudo-optname -2 for get last_ack_number for TCP.
|
|
; TODO: find best way to notify that send()'ed data were acknowledged
|
|
; Also pseudo-optname -3 is valid and returns socket state, one of TCB_*.
|
|
;
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_get_opt:
|
|
|
|
DEBUGF 1,"socket_get_opt\n"
|
|
|
|
call SOCKET_num_to_ptr
|
|
jz s_error
|
|
|
|
cmp dword [edx], IP_PROTO_TCP
|
|
jnz s_error
|
|
cmp dword [edx+4], -2
|
|
jz @f
|
|
cmp dword [edx+4], -3
|
|
jnz s_error
|
|
@@:
|
|
; mov eax, [edx+12]
|
|
; test eax, eax
|
|
; jz .fail
|
|
; cmp dword [eax], 4
|
|
; mov dword [eax], 4
|
|
; jb .fail
|
|
; stdcall net_socket_num_to_addr, ecx
|
|
; test eax, eax
|
|
; jz .fail
|
|
; ; todo: check that eax is really TCP socket
|
|
; mov ecx, [eax + TCP_SOCKET.last_ack_number]
|
|
; cmp dword [edx+4], -2
|
|
; jz @f
|
|
; mov ecx, [eax + TCP_SOCKET.state]
|
|
@@:
|
|
mov eax, [edx+8]
|
|
test eax, eax
|
|
jz @f
|
|
mov [eax], ecx
|
|
@@:
|
|
mov dword [esp+32], 0
|
|
ret
|
|
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_debug
|
|
;
|
|
; Copies socket variables to application buffer
|
|
;
|
|
; IN: ecx = socket number
|
|
; edx = pointer to buffer
|
|
;
|
|
; OUT: -1 on error
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_debug:
|
|
|
|
DEBUGF 1,"socket_debug\n"
|
|
|
|
call SOCKET_num_to_ptr
|
|
jz s_error
|
|
|
|
mov esi, eax
|
|
mov edi, edx
|
|
mov ecx, SOCKETBUFFSIZE/4
|
|
rep movsd
|
|
|
|
mov dword [esp+32], 0
|
|
ret
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_find_port
|
|
;
|
|
; Fills in the local port number for TCP and UDP sockets
|
|
; This procedure always works because the number of sockets is
|
|
; limited to a smaller number then the number of possible ports
|
|
;
|
|
; IN: eax = socket pointer
|
|
; OUT: /
|
|
;
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_find_port:
|
|
|
|
DEBUGF 1,"socket_find_free_port\n"
|
|
|
|
push ebx esi ecx
|
|
|
|
cmp [eax + SOCKET.Type], IP_PROTO_UDP
|
|
je .udp
|
|
|
|
cmp [eax + SOCKET.Type], IP_PROTO_TCP
|
|
je .tcp
|
|
|
|
jmp .error
|
|
|
|
.done:
|
|
mov [eax + UDP_SOCKET.LocalPort], bx
|
|
.error:
|
|
pop ecx esi ebx
|
|
ret
|
|
|
|
.udp:
|
|
mov bx, [last_UDP_port]
|
|
call .findit
|
|
mov [last_UDP_port], bx
|
|
jmp .done
|
|
|
|
.tcp:
|
|
mov bx, [last_TCP_port]
|
|
call .findit
|
|
mov [last_TCP_port], bx
|
|
jmp .done
|
|
|
|
|
|
.restart:
|
|
mov bx, MIN_EPHEMERAL_PORT
|
|
.findit:
|
|
inc bx
|
|
|
|
cmp bx, MAX_EPHEMERAL_PORT
|
|
jz .restart
|
|
|
|
call SOCKET_check_port
|
|
jz .findit
|
|
|
|
ret
|
|
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_check_port
|
|
;
|
|
; Checks if a local port number is unused
|
|
; If the proposed port number is unused, it is filled in in the socket structure
|
|
;
|
|
; IN: eax = socket ptr (to find out if its a TCP/UDP socket)
|
|
; bx = proposed socket number
|
|
;
|
|
; OUT: ZF = cleared on error
|
|
;
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_check_port:
|
|
|
|
DEBUGF 1,"socket_check_port\n"
|
|
|
|
mov ecx, [eax + SOCKET.Type]
|
|
mov esi, net_sockets
|
|
|
|
.next_socket:
|
|
mov esi, [esi + SOCKET.NextPtr]
|
|
or esi, esi
|
|
jz .port_ok
|
|
|
|
cmp [esi + SOCKET.Type], ecx
|
|
jne .next_socket
|
|
|
|
cmp [esi + UDP_SOCKET.LocalPort], bx
|
|
jne .next_socket
|
|
|
|
DEBUGF 1,"local port %u already in use\n", bx
|
|
ret
|
|
|
|
.port_ok:
|
|
mov [eax + UDP_SOCKET.LocalPort], bx
|
|
or bx, bx ; set the zero-flag
|
|
|
|
ret
|
|
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_input
|
|
;
|
|
; Updates a socket with received data
|
|
;
|
|
; Note: the mutex should already be set !
|
|
;
|
|
; IN: eax = socket ptr
|
|
; ebx = pointer to device struct
|
|
; ecx = data size
|
|
; esi = ptr to data
|
|
; [esp] = ptr to buf
|
|
; [esp + 4] = buf size
|
|
;
|
|
; OUT: /
|
|
;
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_input:
|
|
|
|
DEBUGF 1,"socket_input: socket=%x, data=%x size=%u\n", eax, esi, ecx
|
|
|
|
mov dword[esp+4], ecx
|
|
push esi
|
|
mov esi, esp
|
|
|
|
add_to_queue (eax + SOCKET_QUEUE_LOCATION),\
|
|
SOCKET_QUEUE_SIZE,\
|
|
socket_queue_entry.size,\
|
|
SOCKET_input.full
|
|
|
|
DEBUGF 1,"Queued packet successfully\n"
|
|
add esp, socket_queue_entry.size
|
|
mov [eax + SOCKET.lock], 0
|
|
jmp SOCKET_notify_owner
|
|
|
|
.full:
|
|
DEBUGF 2,"Socket %x is full!\n", eax
|
|
mov [eax + SOCKET.lock], 0
|
|
call kernel_free
|
|
add esp, 8
|
|
|
|
ret
|
|
|
|
|
|
;--------------------------
|
|
;
|
|
; eax = ptr to ring struct (just a buffer of the right size)
|
|
;
|
|
align 4
|
|
SOCKET_ring_create:
|
|
|
|
mov esi, eax
|
|
stdcall create_ring_buffer, SOCKET_MAXDATA, PG_SW
|
|
|
|
DEBUGF 1,"SOCKET_ring_created: %x\n", eax
|
|
mov [esi + RING_BUFFER.start_ptr], eax
|
|
mov [esi + RING_BUFFER.write_ptr], eax
|
|
mov [esi + RING_BUFFER.read_ptr], eax
|
|
mov [esi + RING_BUFFER.size], 0
|
|
add eax, SOCKET_MAXDATA
|
|
mov [esi + RING_BUFFER.end_ptr], eax
|
|
|
|
ret
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_ring_write
|
|
;
|
|
; Adds data to a stream socket, and updates write pointer and size
|
|
;
|
|
; IN: eax = ptr to ring struct
|
|
; ecx = data size
|
|
; esi = ptr to data
|
|
;
|
|
; OUT: ecx = number of bytes stored
|
|
;
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_ring_write:
|
|
|
|
DEBUGF 1,"SOCKET_ring_write: ringbuff=%x ptr=%x size=%u\n", eax, esi, ecx
|
|
|
|
add [eax + RING_BUFFER.size], ecx
|
|
cmp [eax + RING_BUFFER.size], SOCKET_MAXDATA
|
|
jg .too_large
|
|
|
|
.copy:
|
|
mov edi, [eax + RING_BUFFER.write_ptr]
|
|
DEBUGF 2,"Copying %u bytes from %x to %x\n", ecx, esi, edi
|
|
|
|
push ecx
|
|
shr ecx, 1
|
|
jnc .nb
|
|
movsb
|
|
.nb:
|
|
shr ecx, 1
|
|
jnc .nw
|
|
movsw
|
|
.nw:
|
|
test ecx, ecx
|
|
jz .nd
|
|
rep movsd
|
|
.nd:
|
|
pop ecx
|
|
|
|
cmp edi, [eax + RING_BUFFER.end_ptr]
|
|
jge .wrap
|
|
mov [eax + RING_BUFFER.write_ptr], edi
|
|
|
|
ret
|
|
|
|
.wrap:
|
|
sub edi, SOCKET_MAXDATA
|
|
mov [eax + RING_BUFFER.write_ptr], edi
|
|
|
|
ret
|
|
|
|
.too_large:
|
|
mov ecx, SOCKET_MAXDATA ; calculate number of bytes available in buffer
|
|
sub ecx, [eax + RING_BUFFER.size]
|
|
jge .full
|
|
|
|
mov [eax + RING_BUFFER.size], SOCKET_MAXDATA ; update size, we will fill buffer completely
|
|
jmp .copy
|
|
|
|
.full:
|
|
DEBUGF 2,"Ring buffer is full!\n"
|
|
xor ecx, ecx
|
|
ret
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_ring_read
|
|
;
|
|
; reads the data, BUT DOES NOT CLEAR IT FROM MEMORY YET
|
|
;
|
|
; IN: eax = ptr to ring struct
|
|
; ecx = buffer size
|
|
; edi = ptr to buffer
|
|
;
|
|
; OUT: ecx = number of bytes read
|
|
;
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_ring_read:
|
|
|
|
DEBUGF 1,"SOCKET_ring_read: ringbuff=%x ptr=%x size=%u\n", eax, edi, ecx
|
|
|
|
cmp ecx, [eax + RING_BUFFER.size]
|
|
jg .less_data
|
|
|
|
.copy:
|
|
mov esi, [eax + RING_BUFFER.read_ptr]
|
|
|
|
DEBUGF 2,"Copying %u bytes from %x to %x\n", ecx, esi, edi
|
|
push ecx
|
|
shr ecx, 1
|
|
jnc .nb
|
|
movsb
|
|
.nb:
|
|
shr ecx, 1
|
|
jnc .nw
|
|
movsw
|
|
.nw:
|
|
test ecx, ecx
|
|
jz .nd
|
|
rep movsd
|
|
.nd:
|
|
pop ecx
|
|
|
|
; .no_data_at_all:
|
|
ret
|
|
|
|
.less_data:
|
|
mov ecx, [eax + RING_BUFFER.size]
|
|
test ecx, ecx
|
|
; jz .no_data_at_all
|
|
jmp .copy
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_ring_free
|
|
;
|
|
; Free's some bytes from the ringbuffer
|
|
;
|
|
; IN: eax = ptr to ring struct
|
|
; ecx = data size
|
|
;
|
|
; OUT: ecx = number of bytes free-ed
|
|
;
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_ring_free:
|
|
|
|
DEBUGF 1,"Trying to free %u bytes of data from ring %x\n", ecx, eax
|
|
|
|
sub [eax + RING_BUFFER.size], ecx
|
|
jl .sumthinwong
|
|
add [eax + RING_BUFFER.read_ptr], ecx
|
|
|
|
mov edx, [eax + RING_BUFFER.end_ptr]
|
|
cmp [eax + RING_BUFFER.read_ptr], edx
|
|
jl @f
|
|
sub [eax + RING_BUFFER.read_ptr], SOCKET_MAXDATA
|
|
@@:
|
|
ret
|
|
|
|
.sumthinwong: ; we could free all available bytes, but that would be stupid, i guess..
|
|
add [eax + RING_BUFFER.size], ecx
|
|
xor ecx, ecx
|
|
ret
|
|
|
|
|
|
;-----------------------------------------------------------------
|
|
;
|
|
; SOCKET_notify_owner
|
|
;
|
|
; notify's the owner of a socket that something happened
|
|
;
|
|
; IN: eax = socket ptr
|
|
; OUT: /
|
|
;
|
|
;-----------------------------------------------------------------
|
|
align 4
|
|
SOCKET_notify_owner:
|
|
|
|
DEBUGF 1,"socket_notify_owner\n"
|
|
|
|
call SOCKET_check
|
|
jz .error
|
|
|
|
push ecx eax esi
|
|
|
|
; socket exists, now try to flag an event to the application
|
|
|
|
mov eax, [eax + SOCKET.PID]
|
|
mov ecx, 1
|
|
mov esi, TASK_DATA + TASKDATA.pid
|
|
|
|
.next_pid:
|
|
cmp [esi], eax
|
|
je .found_pid
|
|
inc ecx
|
|
add esi, 0x20
|
|
cmp ecx, [TASK_COUNT]
|
|
jbe .next_pid
|
|
|
|
; PID not found, TODO: close socket!
|
|
|
|
jmp .error2
|
|
|
|
.found_pid:
|
|
shl ecx, 8
|
|
or [ecx + SLOT_BASE + APPDATA.event_mask], EVENT_NETWORK
|
|
mov [check_idle_semaphore], 200
|
|
|
|
DEBUGF 1,"owner notified\n"
|
|
|
|
.error2:
|
|
pop esi eax ecx
|
|
.error:
|
|
|
|
ret
|
|
|
|
|
|
;--------------------------------------------------------------------
|
|
;
|
|
; SOCKET_alloc
|
|
;
|
|
; Allocate memory for socket data and put new socket into the list
|
|
; Newly created socket is initialized with calling PID and number and
|
|
; put into beginning of list (which is a fastest way).
|
|
;
|
|
; IN: /
|
|
; OUT: eax = 0 on error, socket ptr otherwise
|
|
; edi = socket number
|
|
; ZF = cleared on error
|
|
;
|
|
;--------------------------------------------------------------------
|
|
align 4
|
|
SOCKET_alloc:
|
|
|
|
push ecx ebx
|
|
|
|
stdcall kernel_alloc, SOCKETBUFFSIZE
|
|
DEBUGF 1, "SOCKET_alloc: ptr=%x\n", eax
|
|
or eax, eax
|
|
jz .exit
|
|
|
|
; zero-initialize allocated memory
|
|
push eax edi
|
|
mov edi, eax
|
|
mov ecx, SOCKETBUFFSIZE / 4
|
|
xor eax, eax
|
|
rep stosd
|
|
pop edi eax
|
|
|
|
; find first free socket number and use it
|
|
mov ebx, net_sockets
|
|
xor ecx, ecx
|
|
.next_socket_number:
|
|
inc ecx
|
|
.next_socket:
|
|
mov ebx, [ebx + SOCKET.NextPtr]
|
|
test ebx, ebx
|
|
jz .last_socket
|
|
cmp [ebx + SOCKET.Number], ecx
|
|
jne .next_socket
|
|
mov ebx, net_sockets
|
|
jmp .next_socket_number
|
|
|
|
.last_socket:
|
|
mov [eax + SOCKET.Number], ecx
|
|
DEBUGF 1, "SOCKET_alloc: number=%u\n", ecx
|
|
mov edi, ecx
|
|
|
|
; Fill in PID
|
|
mov ebx, [TASK_BASE]
|
|
mov ebx, [ebx + TASKDATA.pid]
|
|
mov [eax + SOCKET.PID], ebx
|
|
|
|
; add socket to the list by re-arranging some pointers
|
|
mov ebx, [net_sockets + SOCKET.NextPtr]
|
|
|
|
mov [eax + SOCKET.PrevPtr], net_sockets
|
|
mov [eax + SOCKET.NextPtr], ebx
|
|
|
|
test ebx, ebx
|
|
jz @f
|
|
add ebx, SOCKET.lock ; lock the next socket
|
|
call wait_mutex
|
|
sub ebx, SOCKET.lock
|
|
mov [ebx + SOCKET.PrevPtr], eax
|
|
mov [ebx + SOCKET.lock], 0
|
|
@@:
|
|
|
|
mov [net_sockets + SOCKET.NextPtr], eax
|
|
or eax, eax ; used to clear zero flag
|
|
.exit:
|
|
pop ebx ecx
|
|
|
|
ret
|
|
|
|
|
|
;----------------------------------------------------
|
|
;
|
|
; SOCKET_free
|
|
;
|
|
; Free socket data memory and remove socket from the list
|
|
;
|
|
; IN: eax = socket ptr
|
|
; OUT: /
|
|
;
|
|
;----------------------------------------------------
|
|
align 4
|
|
SOCKET_free:
|
|
|
|
DEBUGF 1, "socket_free: %x\n", eax
|
|
|
|
call SOCKET_check
|
|
jz .error
|
|
|
|
push ebx
|
|
lea ebx, [eax + SOCKET.lock]
|
|
call wait_mutex
|
|
|
|
DEBUGF 1, "freeing socket..\n"
|
|
|
|
cmp [eax + SOCKET.Domain], AF_INET4
|
|
jnz .no_stream
|
|
|
|
cmp [eax + SOCKET.Type], IP_PROTO_TCP
|
|
jnz .no_stream
|
|
|
|
stdcall kernel_free, [eax + STREAM_SOCKET.rcv + RING_BUFFER.start_ptr]
|
|
stdcall kernel_free, [eax + STREAM_SOCKET.snd + RING_BUFFER.start_ptr]
|
|
.no_stream:
|
|
|
|
push eax ; this will be passed to kernel_free
|
|
mov ebx, [eax + SOCKET.NextPtr]
|
|
mov eax, [eax + SOCKET.PrevPtr]
|
|
|
|
DEBUGF 1, "linking socket %x to socket %x\n", eax, ebx
|
|
|
|
test eax, eax
|
|
jz @f
|
|
mov [eax + SOCKET.NextPtr], ebx
|
|
@@:
|
|
|
|
test ebx, ebx
|
|
jz @f
|
|
mov [ebx + SOCKET.PrevPtr], eax
|
|
@@:
|
|
|
|
call kernel_free
|
|
pop ebx
|
|
|
|
DEBUGF 1, "socket is gone!\n"
|
|
|
|
.error:
|
|
ret
|
|
|
|
|
|
; IN: socket nr in ebx
|
|
; OUT: socket nr in eax
|
|
; preserves edx
|
|
|
|
align 4
|
|
SOCKET_fork:
|
|
|
|
;; Exit if backlog queue is full
|
|
; mov ax, [ebx + TCP_SOCKET.backlog_cur]
|
|
; cmp ax, [ebx + TCP_SOCKET.backlog]
|
|
; jae .exit
|
|
|
|
; Allocate new socket
|
|
call SOCKET_alloc
|
|
;;; jz .fail
|
|
|
|
; Copy structure from current socket to new, (including lock!)
|
|
; We start at PID to reserve the socket num, and the 2 pointers at beginning of socket
|
|
lea esi, [edx + SOCKET.PID]
|
|
lea edi, [eax + SOCKET.PID]
|
|
mov ecx, (TCP_SOCKET.end - SOCKET.PID + 3)/4
|
|
rep movsd
|
|
|
|
;; Push pointer to new socket to queue
|
|
; movzx ecx, [ebx + TCP_SOCKET.backlog_cur]
|
|
; inc [ebx + TCP_SOCKET.backlog_cur]
|
|
; mov [ebx + TCP_SOCKET.end + ecx*4], eax
|
|
|
|
;;;; mov [eax + IP_SOCKET.RemoteIP], esi ; IP source address
|
|
|
|
ret
|
|
|
|
|
|
;---------------------------------------------------
|
|
;
|
|
; SOCKET_num_to_ptr
|
|
;
|
|
; Get socket structure address by its number
|
|
;
|
|
; IN: ecx = socket number
|
|
; OUT: eax = 0 on error, socket ptr otherwise
|
|
; ZF = set on error
|
|
;
|
|
;---------------------------------------------------
|
|
align 4
|
|
SOCKET_num_to_ptr:
|
|
|
|
DEBUGF 1,"socket_num_to_ptr: %u ", ecx
|
|
|
|
mov eax, net_sockets
|
|
|
|
.next_socket:
|
|
mov eax, [eax + SOCKET.NextPtr]
|
|
or eax, eax
|
|
jz .error
|
|
cmp [eax + SOCKET.Number], ecx
|
|
jne .next_socket
|
|
|
|
test eax, eax
|
|
|
|
DEBUGF 1,"(%x)\n", eax
|
|
.error:
|
|
ret
|
|
|
|
|
|
;---------------------------------------------------
|
|
;
|
|
; SOCKET_ptr_to_num
|
|
;
|
|
; Get socket number by its address
|
|
;
|
|
; IN: eax = socket ptr
|
|
; OUT: eax = 0 on error, socket num otherwise
|
|
; ZF = set on error
|
|
;
|
|
;---------------------------------------------------
|
|
align 4
|
|
SOCKET_ptr_to_num:
|
|
|
|
DEBUGF 1,"socket_ptr_to_num: %x ", eax
|
|
|
|
call SOCKET_check
|
|
jz .error
|
|
|
|
mov eax, [eax + SOCKET.Number]
|
|
|
|
DEBUGF 1,"(%u)\n", eax
|
|
|
|
.error:
|
|
ret
|
|
|
|
|
|
;---------------------------------------------------
|
|
;
|
|
; SOCKET_check
|
|
;
|
|
; checks if the given value is really a socket ptr
|
|
;
|
|
; IN: eax = socket ptr
|
|
; OUT: eax = 0 on error, unchanged otherwise
|
|
; ZF = set on error
|
|
;
|
|
;---------------------------------------------------
|
|
align 4
|
|
SOCKET_check:
|
|
|
|
DEBUGF 1,"socket_check\n"
|
|
|
|
push ebx
|
|
mov ebx, net_sockets
|
|
|
|
.next_socket:
|
|
mov ebx, [ebx + SOCKET.NextPtr]
|
|
or ebx, ebx
|
|
jz .done
|
|
cmp ebx, eax
|
|
jnz .next_socket
|
|
|
|
.done:
|
|
mov eax, ebx
|
|
test eax, eax
|
|
pop ebx
|
|
|
|
ret
|
|
|
|
|
|
|
|
;---------------------------------------------------
|
|
;
|
|
; SOCKET_check_owner
|
|
;
|
|
; checks if the caller application owns the socket
|
|
;
|
|
; IN: eax = socket ptr
|
|
; OUT: ZF = true/false
|
|
;
|
|
;---------------------------------------------------
|
|
align 4
|
|
SOCKET_check_owner:
|
|
|
|
DEBUGF 1,"socket_check_owner\n"
|
|
|
|
push ebx
|
|
mov ebx, [TASK_BASE]
|
|
mov ebx, [ecx + TASKDATA.pid]
|
|
cmp [eax + SOCKET.PID], ebx
|
|
pop ebx
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
;---------------------------------------------------
|
|
;
|
|
; SOCKET_process_end
|
|
;
|
|
; Kernel calls this function when a certain process ends
|
|
; This function will check if the process had any open sockets
|
|
; And update them accordingly
|
|
;
|
|
; IN: eax = pid
|
|
; OUT: /
|
|
;
|
|
;------------------------------------------------------
|
|
align 4
|
|
SOCKET_process_end:
|
|
|
|
DEBUGF 1,"socket_process_end: %x\n", eax
|
|
|
|
push ebx
|
|
mov ebx, net_sockets
|
|
|
|
.next_socket:
|
|
|
|
mov ebx, [ebx + SOCKET.NextPtr]
|
|
.test_socket:
|
|
test ebx, ebx
|
|
jz .done
|
|
|
|
cmp [ebx + SOCKET.PID], eax
|
|
jne .next_socket
|
|
|
|
DEBUGF 1,"closing socket %x", eax, ebx
|
|
|
|
mov [ebx + SOCKET.PID], 0
|
|
|
|
cmp [ebx + SOCKET.Type], IP_PROTO_UDP
|
|
je .udp
|
|
|
|
cmp [ebx + SOCKET.Type], IP_PROTO_TCP
|
|
je .tcp
|
|
|
|
jmp .next_socket ; kill all sockets for given PID
|
|
|
|
.udp:
|
|
mov eax, ebx
|
|
mov ebx, [ebx + SOCKET.NextPtr]
|
|
call SOCKET_free
|
|
jmp .test_socket
|
|
|
|
.tcp:
|
|
|
|
jmp .next_socket
|
|
|
|
.done:
|
|
pop ebx
|
|
|
|
ret
|