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Rev 4052 Rev 4347
Line 24... Line 24...
24 
;
 24 
;
25 
; OUT: /
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; OUT: /
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;
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;
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;-----------------------------------------------------------------
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;-----------------------------------------------------------------
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align 4
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align 4
29 
TCP_output:
 29 
proc TCP_output
- 
 
 30 
 
- 
 
 31 
locals
- 
 
 32 
        temp_bits       db ?
- 
 
 33 
endl
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 34 
 
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        DEBUGF  DEBUG_NETWORK_VERBOSE, "TCP_output: socket=%x\n", eax
 35 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "TCP_output: socket=%x\n", eax
32 
 
 36 
 
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        mov     ebx, [eax + TCP_SOCKET.t_maxseg]
 59 
        mov     ebx, [eax + TCP_SOCKET.t_maxseg]
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        mov     [eax + TCP_SOCKET.SND_CWND], ebx
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        mov     [eax + TCP_SOCKET.SND_CWND], ebx
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 61 
 
58 
  .not_idle:
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  .not_idle:
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  .again:
 63 
  .again:
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        mov     [eax + TCP_SOCKET.temp_bits], 0
 64 
        mov     [temp_bits], 0
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 65 
 
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        mov     ebx, [eax + TCP_SOCKET.SND_NXT]         ; calculate offset (71)
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        mov     ebx, [eax + TCP_SOCKET.SND_NXT]         ; calculate offset (71)
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143 
 
 147 
 
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        cmp     esi, [eax + TCP_SOCKET.t_maxseg]
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        cmp     esi, [eax + TCP_SOCKET.t_maxseg]
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        jbe     @f
 149 
        jbe     @f
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 150 
 
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        mov     esi, [eax + TCP_SOCKET.t_maxseg]
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        mov     esi, [eax + TCP_SOCKET.t_maxseg]
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        or      [eax + TCP_SOCKET.temp_bits], TCP_BIT_SENDALOT
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        or      [temp_bits], TCP_BIT_SENDALOT
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       @@:
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       @@:
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        add     esi, edi                        ; total TCP segment size
 408 
        add     esi, edi                        ; total TCP segment size
405 
        cmp     esi, [eax + TCP_SOCKET.t_maxseg]
 409 
        cmp     esi, [eax + TCP_SOCKET.t_maxseg]
406 
        jbe     .no_overflow
 410 
        jbe     .no_overflow
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 411 
 
408 
        mov     esi, [eax + TCP_SOCKET.t_maxseg]
 412 
        mov     esi, [eax + TCP_SOCKET.t_maxseg]
409 
        or      [eax + TCP_SOCKET.temp_bits], TCP_BIT_SENDALOT
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        or      [temp_bits], TCP_BIT_SENDALOT
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- 
 
 414 
  .no_overflow:
- 
 
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- 
 
 416 
;----------------------------------------------------
- 
 
 417 
; Calculate the receive window.
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; Dont shrink window, but avoid silly window syndrome
- 
 
 419 
 
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        mov     ebx, SOCKET_MAXDATA
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        sub     ebx, [eax + STREAM_SOCKET.rcv.size]
- 
 
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- 
 
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        cmp     ebx, SOCKET_MAXDATA/4
- 
 
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        jae     @f
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        cmp     ebx, [eax + TCP_SOCKET.t_maxseg]
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        jae     @f
- 
 
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        xor     ebx, ebx
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 428 
  @@:
- 
 
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- 
 
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        cmp     ebx, TCP_max_win
- 
 
 431 
        jbe     @f
- 
 
 432 
        mov     ebx, TCP_max_win
- 
 
 433 
  @@:
- 
 
 434 
 
- 
 
 435 
        mov     ecx, [eax + TCP_SOCKET.RCV_ADV]
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 436 
        sub     ecx, [eax + TCP_SOCKET.RCV_NXT]
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        cmp     ebx, ecx
- 
 
 438 
        ja      @f
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 439 
        mov     ebx, ecx
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 440 
  @@:
- 
 
 441 
 
- 
 
 442 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "TCP_send: window = %u\n", ebx
- 
 
 443 
 
- 
 
 444 
        mov     cl, [eax + TCP_SOCKET.RCV_SCALE]
- 
 
 445 
        shr     ebx, cl
410 
  .no_overflow:
 446 
        xchg    bl, bh
411 
 
 447 
 
412 
;-----------------------------------------------------------------
 448 
;-----------------------------------------------------------------
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413 
; Start by pushing all TCP header values in reverse order on stack
 449 
; Start by pushing all TCP header values in reverse order on stack
414 
; (essentially, creating the tcp header on the stack!)
 450 
; (essentially, creating the tcp header on the stack!)
415 
 
 451 
 
416 
        pushw   0       ;        .UrgentPointer          dw ?
 452 
        pushw   0       ;        .UrgentPointer          dw ?
417 
        pushw   0       ;        .Checksum               dw ?
 453 
        pushw   0       ;        .Checksum               dw ?
418 
        pushw   0x00a0  ;        .Window                 dw ?    ;;;;;;; FIXME (370)
 454 
        pushw   bx      ;        .Window                 dw ?
419 
        shl     edi, 2  ;        .DataOffset             db ?  only 4 left-most bits
 455 
        shl     edi, 2  ;        .DataOffset             db ?  only 4 left-most bits
420 
        shl     dx, 8
 456 
        shl     dx, 8
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 600 
 
565 
; update last ack sent
 601 
; update last ack sent
566 
        push    [eax + TCP_SOCKET.RCV_NXT]
 602 
        push    [eax + TCP_SOCKET.RCV_NXT]
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567 
        pop     [eax + TCP_SOCKET.last_ack_sent]
 603 
        pop     [eax + TCP_SOCKET.last_ack_sent]
568 
 
 604 
 
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569 
; and flags
 605 
; clear the ACK flags
570 
        and     [eax + TCP_SOCKET.t_flags], not (TF_ACKNOW + TF_DELACK)
 606 
        and     [eax + TCP_SOCKET.t_flags], not (TF_ACKNOW + TF_DELACK)
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580 
        pop     eax
 616 
        pop     eax
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581 
 
 617 
 
582 
;-----------------------------
 618 
;-----------------------------
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583 
; Check if we need more output
 619 
; Check if we need more output
584 
 
 620 
 
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585 
        test    [eax + TCP_SOCKET.temp_bits], TCP_BIT_SENDALOT
 621 
        test    [temp_bits], TCP_BIT_SENDALOT
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586 
        jnz     TCP_output.again
 622 
        jnz     TCP_output.again
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620 
 
 656 
 
621 
        or      eax, -2
 657 
        or      eax, -2
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622 
        ret
 - 
 
623 

            -
            
 

          

          

            624
            

            -
            
 

          

          

            625
            

            658
            
        ret

          

          

            626
            

            659