forked from KolibriOS/kolibrios
168 lines
4.5 KiB
PHP
168 lines
4.5 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; Part of the TCP/IP network stack for KolibriOS ;;
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;; ;;
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;; Written by hidnplayr@kolibrios.org ;;
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;; ;;
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;; Based on the code of 4.4BSD ;;
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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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;----------------------
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; 160 ms timer
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;----------------------
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macro TCP_timer_160ms {
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local .loop
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local .exit
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mov ebx, net_sockets
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.loop:
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mov ebx, [ebx + SOCKET.NextPtr]
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or ebx, ebx
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jz .exit
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cmp [ebx + SOCKET.Domain], AF_INET4
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jne .loop
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cmp [ebx + SOCKET.Protocol], IP_PROTO_TCP
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jne .loop
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test [ebx + TCP_SOCKET.t_flags], TF_DELACK
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jz .loop
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and [ebx + TCP_SOCKET.t_flags], not (TF_DELACK)
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push ebx
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mov cl, TH_ACK
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call TCP_respond
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; and [ebx + TCP_SOCKET.t_flags], TF_ACKNOW ;;
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; mov eax, ebx ;;
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; call TCP_output ;;
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pop ebx
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jmp .loop
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.exit:
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}
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;----------------------
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; 640 ms timer
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;----------------------
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macro TCP_timer_640ms {
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local .loop
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local .exit
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; Update TCP sequence number
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add [TCP_sequence_num], 64000
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; scan through all the active TCP sockets, decrementing ALL timers
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; timers do not have the chance to wrap because the keepalive timer will kill the socket when it expires
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mov eax, net_sockets
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.loop:
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mov eax, [eax + SOCKET.NextPtr]
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.check_only:
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or eax, eax
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jz .exit
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cmp [eax + SOCKET.Domain], AF_INET4
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jne .loop
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cmp [eax + SOCKET.Protocol], IP_PROTO_TCP
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jne .loop
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inc [eax + TCP_SOCKET.t_idle]
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dec [eax + TCP_SOCKET.timer_retransmission]
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jnz .check_more2
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DEBUGF 1,"socket %x: Retransmission timer expired\n", eax
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push eax
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call TCP_output
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pop eax
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.check_more2:
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dec [eax + TCP_SOCKET.timer_keepalive]
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jnz .check_more3
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DEBUGF 1,"socket %x: Keepalive expired\n", eax
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cmp [eax + TCP_SOCKET.state], TCPS_ESTABLISHED
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ja .dont_kill
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push eax
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call TCP_disconnect
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pop eax
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jmp .loop
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.dont_kill:
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test [eax + SOCKET.options], SO_KEEPALIVE
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jz .reset_keepalive
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push eax
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mov ebx, eax
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xor cl, cl
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call TCP_respond ; send keepalive
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pop eax
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mov [eax + TCP_SOCKET.timer_keepalive], TCP_time_keep_interval
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jmp .check_more3
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.reset_keepalive:
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mov [eax + TCP_SOCKET.timer_keepalive], TCP_time_keep_idle
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.check_more3:
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dec [eax + TCP_SOCKET.timer_timed_wait]
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jnz .check_more5
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DEBUGF 1,"socket %x: 2MSL timer expired\n", eax
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.check_more5:
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dec [eax + TCP_SOCKET.timer_persist]
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jnz .loop
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DEBUGF 1,"socket %x: persist timer expired\n", eax
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call TCP_set_persist
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mov [eax + TCP_SOCKET.t_force], 1
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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 + TCP_SOCKET.t_force], 0
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jmp .loop
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.exit:
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}
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; eax = socket
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TCP_cancel_timers:
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push eax edi
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lea edi, [eax + TCP_SOCKET.timer_retransmission]
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xor eax, eax
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stosd
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stosd
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stosd
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stosd
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stosd
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pop edi eax
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ret |