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TCP: advertise correct window, small updates and bugfixes

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git-svn-id: svn://kolibrios.org@4347 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr
2013-12-13 12:20:53 +00:00
parent df6a761ad4
commit bf755d6cbd
4 changed files with 93 additions and 67 deletions
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55
kernel/trunk/network/tcp_output.inc
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@@ -26,7 +26,11 @@ $Revision: 3289 $
;
;-----------------------------------------------------------------
align 4
TCP_output:
proc TCP_output
locals
temp_bits db ?
endl
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: socket=%x\n", eax
@@ -57,7 +61,7 @@ TCP_output:
.not_idle:
.again:
mov [eax + TCP_SOCKET.temp_bits], 0
mov [temp_bits], 0
mov ebx, [eax + TCP_SOCKET.SND_NXT] ; calculate offset (71)
sub ebx, [eax + TCP_SOCKET.SND_UNA] ;
@@ -145,7 +149,7 @@ TCP_output:
jbe @f
mov esi, [eax + TCP_SOCKET.t_maxseg]
or [eax + TCP_SOCKET.temp_bits], TCP_BIT_SENDALOT
or [temp_bits], TCP_BIT_SENDALOT
@@:
;--------------------------------------------
@@ -406,16 +410,48 @@ TCP_send:
jbe .no_overflow
mov esi, [eax + TCP_SOCKET.t_maxseg]
or [eax + TCP_SOCKET.temp_bits], TCP_BIT_SENDALOT
or [temp_bits], TCP_BIT_SENDALOT
.no_overflow:
;----------------------------------------------------
; Calculate the receive window.
; Dont shrink window, but avoid silly window syndrome
mov ebx, SOCKET_MAXDATA
sub ebx, [eax + STREAM_SOCKET.rcv.size]
cmp ebx, SOCKET_MAXDATA/4
jae @f
cmp ebx, [eax + TCP_SOCKET.t_maxseg]
jae @f
xor ebx, ebx
@@:
cmp ebx, TCP_max_win
jbe @f
mov ebx, TCP_max_win
@@:
mov ecx, [eax + TCP_SOCKET.RCV_ADV]
sub ecx, [eax + TCP_SOCKET.RCV_NXT]
cmp ebx, ecx
ja @f
mov ebx, ecx
@@:
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: window = %u\n", ebx
mov cl, [eax + TCP_SOCKET.RCV_SCALE]
shr ebx, cl
xchg bl, bh
;-----------------------------------------------------------------
; Start by pushing all TCP header values in reverse order on stack
; (essentially, creating the tcp header on the stack!)
pushw 0 ; .UrgentPointer dw ?
pushw 0 ; .Checksum dw ?
pushw 0x00a0 ; .Window dw ? ;;;;;;; FIXME (370)
pushw bx ; .Window dw ?
shl edi, 2 ; .DataOffset db ? only 4 left-most bits
shl dx, 8
or dx, di ; .Flags db ?
@@ -566,7 +602,7 @@ TCP_send:
push [eax + TCP_SOCKET.RCV_NXT]
pop [eax + TCP_SOCKET.last_ack_sent]
; and flags
; clear the ACK flags
and [eax + TCP_SOCKET.t_flags], not (TF_ACKNOW + TF_DELACK)
;--------------
@@ -582,7 +618,7 @@ TCP_send:
;-----------------------------
; Check if we need more output
test [eax + TCP_SOCKET.temp_bits], TCP_BIT_SENDALOT
test [temp_bits], TCP_BIT_SENDALOT
jnz TCP_output.again
DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: success!\n"
@@ -622,7 +658,4 @@ TCP_send:
ret
endp