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Small changes in TCP_input

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git-svn-id: svn://kolibrios.org@5133 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2014-09-19 19:02:34 +00:00
parent 7406df89a5
commit c993fd46f8
2 changed files with 40 additions and 43 deletions
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1
kernel/trunk/network/tcp.inc
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@ -96,6 +96,7 @@ TCP_RTTVAR_SHIFT = 2
TCP_BIT_NEEDOUTPUT = 1 shl 0
TCP_BIT_TIMESTAMP = 1 shl 1
TCP_BIT_DROPSOCKET = 1 shl 2
TCP_BIT_FIN_IS_ACKED = 1 shl 3
TCP_BIT_SENDALOT = 1 shl 0

70
kernel/trunk/network/tcp_input.inc
View File

@ -1,13 +1,13 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
;; Copyright (C) KolibriOS team 2004-2014. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; Part of the TCP/IP network stack for KolibriOS ;;
;; ;;
;; Written by hidnplayr@kolibrios.org ;;
;; ;;
;; Based on the code of 4.4BSD ;;
;; Based on the algorithms used in 4.4BSD ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
@ -531,11 +531,9 @@ endl
cmp eax, [ebx + TCP_SOCKET.SND_UNA]
jne .not_uni_xfer
; - The reassembly list of out-of-order segments for the connection is empty (seg_next equals tp).
;;; TODO
; jnz .not_uni_xfer
; - The reassembly list of out-of-order segments for the connection is empty.
cmp [ebx + TCP_SOCKET.seg_next], 0
jne .not_uni_xfer
; Complete processing of received data
@ -840,7 +838,7 @@ endl
pop word [ebx + TCP_SOCKET.SND_SCALE]
@@:
;;; TODO: call TCP_reassemble
call TCP_reassemble
mov eax, [edx + TCP_header.SequenceNumber]
dec eax
@ -1094,8 +1092,7 @@ endl
pop ebx edx ecx
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: our FIN is acked\n"
stc
or [temp_bits], TCP_BIT_FIN_IS_ACKED
jmp .wakeup
.finiacked:
@ -1109,19 +1106,15 @@ endl
pop edx ecx
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: our FIN is not acked\n"
clc
;----------------------------------------
; Wake up process waiting on send buffer
.wakeup:
pushf ; Keep the flags (Carry flag)
mov eax, ebx
call SOCKET_notify
; Update TCPS
mov eax, [edx + TCP_header.AckNumber]
mov [ebx + TCP_SOCKET.SND_UNA], eax
cmp eax, [ebx + TCP_SOCKET.SND_NXT]
@ -1129,8 +1122,6 @@ endl
mov [ebx + TCP_SOCKET.SND_NXT], eax
@@:
popf
; General ACK handling complete
; Now do the state-specific ones
; Carry flag is set when our FIN is acked
@ -1153,7 +1144,8 @@ endl
.ack_fw1:
jnc .ack_processed
test [temp_bits], TCP_BIT_FIN_IS_ACKED
jz .ack_processed
test [ebx + SOCKET.state], SS_CANTRCVMORE
jnz @f
@ -1166,7 +1158,8 @@ endl
jmp .ack_processed
.ack_c:
jnc .ack_processed
test [temp_bits], TCP_BIT_FIN_IS_ACKED
jz .ack_processed
mov [ebx + TCP_SOCKET.t_state], TCPS_TIMED_WAIT
mov eax, ebx
@ -1178,7 +1171,8 @@ endl
jmp .ack_processed
.ack_la:
jnc .ack_processed
test [temp_bits], TCP_BIT_FIN_IS_ACKED
jz .ack_processed
push ebx
lea ecx, [ebx + SOCKET.mutex]
@ -1252,7 +1246,7 @@ align 4
call SOCKET_notify
popa
jmp .trim_then_step6
jmp .trim
;------------
; Active Open
@ -1345,9 +1339,9 @@ align 4
mov eax, [ebx + TCP_SOCKET.t_rtt]
test eax, eax
je .trim_then_step6
je .trim
call TCP_xmit_timer
jmp .trim_then_step6
jmp .trim
.simultaneous_open:
@ -1358,8 +1352,7 @@ align 4
;-------------------------------------
; Common processing for receipt of SYN
.trim_then_step6:
.trim:
inc [edx + TCP_header.SequenceNumber]
; Drop any received data that doesnt fit in the receive window.
@ -1372,17 +1365,12 @@ align 4
;;; TODO: update stats
.dont_trim:
mov eax, [edx + TCP_header.SequenceNumber]
mov [ebx + TCP_SOCKET.RCV_UP], eax
dec eax
mov [ebx + TCP_SOCKET.SND_WL1], eax
;-------
; step 6
.ack_processed:
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: ACK processed\n"
;----------------------------------------------
@ -1587,14 +1575,14 @@ align 4
jnz .need_output
test [eax + TCP_SOCKET.t_flags], TF_ACKNOW
jz .dumpit
jz .done
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: ACK now!\n"
.need_output:
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: need output\n"
call TCP_output
.dumpit:
.done:
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: dumping\n"
call NET_packet_free
@ -1614,7 +1602,7 @@ align 4
pop eax edx
test [edx + TCP_header.Flags], TH_RST
jnz .dumpit
jnz .done
or [eax + TCP_SOCKET.t_flags], TF_ACKNOW
jmp .need_output
@ -1628,7 +1616,7 @@ align 4
pop edx ebx
test [edx + TCP_header.Flags], TH_RST
jnz .dumpit
jnz .done
;;; if its a multicast/broadcast, also drop
@ -1637,7 +1625,7 @@ align 4
test [edx + TCP_header.Flags], TH_SYN
jnz .respond_syn
jmp .dumpit
jmp .done
;---------
; Respond
@ -1656,8 +1644,10 @@ align 4
pop ebx
jmp .destroy_new_socket
.no_socket:
;-----------------------------------------
; The connection has no associated socket
.no_socket:
pusha
mov ecx, socket_mutex
call mutex_unlock
@ -1687,8 +1677,8 @@ align 4
call TCP_respond_segment
jmp .drop_no_socket
;-----
; Drop
;------------------------------------------------
; Unlock socket mutex and prepare to drop segment
.drop:
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Dropping segment\n"
@ -1698,6 +1688,9 @@ align 4
call mutex_unlock
popa
;--------------------------------------------
; Destroy the newly created socket if needed
.destroy_new_socket:
test [temp_bits], TCP_BIT_DROPSOCKET
jz .drop_no_socket
@ -1705,6 +1698,9 @@ align 4
mov eax, ebx
call SOCKET_free
;------------------
; Drop the segment
.drop_no_socket:
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Drop (no socket)\n"