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| Rev 6710 | Rev 6907 | ||
|---|---|---|---|
| Line 12... | Line 12... | ||
| 12 | ;; GNU GENERAL PUBLIC LICENSE ;; |
12 | ;; GNU GENERAL PUBLIC LICENSE ;; |
| 13 | ;; Version 2, June 1991 ;; |
13 | ;; Version 2, June 1991 ;; |
| 14 | ;; ;; |
14 | ;; ;; |
| 15 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
15 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| Line 16... | Line 16... | ||
| 16 | 16 | ||
| Line 17... | Line 17... | ||
| 17 | $Revision: 6710 $ |
17 | $Revision: 6907 $ |
| 18 | 18 | ||
| 19 | TCP_BIT_NEEDOUTPUT = 1 shl 0 |
19 | TCP_BIT_NEEDOUTPUT = 1 shl 0 |
| 20 | TCP_BIT_TIMESTAMP = 1 shl 1 |
20 | TCP_BIT_TIMESTAMP = 1 shl 1 |
| Line 35... | Line 35... | ||
| 35 | ; OUT: / ; |
35 | ; OUT: / ; |
| 36 | ; ; |
36 | ; ; |
| 37 | ;-----------------------------------------------------------------; |
37 | ;-----------------------------------------------------------------; |
| 38 | align 4 |
38 | align 4 |
| 39 | tcp_input: |
39 | tcp_input: |
| 40 | - | ||
| - | 40 | DEBUGF 1, "tcp_input!\n" |
|
| 41 | ; record the current time |
41 | ; record the current time |
| 42 | push [timer_ticks] ; in 1/100 seconds |
42 | push [timer_ticks] ; in 1/100 seconds |
| 43 | push ebx ecx esi edx ; mind the order (see TCP_queue_entry struct) |
43 | push ebx ecx esi edx ; mind the order (see TCP_queue_entry struct) |
| 44 | mov esi, esp |
44 | mov esi, esp |
| Line 52... | Line 52... | ||
| 52 | 52 | ||
| 53 | xor edx, edx |
53 | xor edx, edx |
| 54 | mov eax, [TCP_input_event] |
54 | mov eax, [TCP_input_event] |
| 55 | mov ebx, [eax + EVENT.id] |
55 | mov ebx, [eax + EVENT.id] |
| - | 56 | xor esi, esi |
|
| 56 | xor esi, esi |
57 | ; DEBUGF 1, "Raising Event on TCP input\n" |
| Line 57... | Line 58... | ||
| 57 | call raise_event |
58 | call raise_event |
| Line 58... | Line 59... | ||
| 58 | 59 | ||
| Line 94... | Line 95... | ||
| 94 | 95 | ||
| 95 | .wait: |
96 | .wait: |
| 96 | mov eax, [TCP_input_event] |
97 | mov eax, [TCP_input_event] |
| 97 | mov ebx, [eax + EVENT.id] |
98 | mov ebx, [eax + EVENT.id] |
| - | 99 | call wait_event |
|
| Line 98... | Line 100... | ||
| 98 | call wait_event |
100 | DEBUGF 1, "Woke up with tcp_input_event\n" |
| 99 | 101 | ||
| Line 100... | Line 102... | ||
| 100 | .loop: |
102 | .loop: |
| Line 107... | Line 109... | ||
| 107 | mov ebx, [esi + TCP_queue_entry.device_ptr] |
109 | mov ebx, [esi + TCP_queue_entry.device_ptr] |
| 108 | mov ecx, [esi + TCP_queue_entry.segment_size] |
110 | mov ecx, [esi + TCP_queue_entry.segment_size] |
| 109 | mov edi, [esi + TCP_queue_entry.ip_ptr] ; ptr to ipv4 header |
111 | mov edi, [esi + TCP_queue_entry.ip_ptr] ; ptr to ipv4 header |
| 110 | mov esi, [esi + TCP_queue_entry.segment_ptr] ; change esi last |
112 | mov esi, [esi + TCP_queue_entry.segment_ptr] ; change esi last |
| Line 111... | Line 113... | ||
| 111 | 113 | ||
| Line 112... | Line 114... | ||
| 112 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: size=%u time=%d\n", ecx, [timer_ticks] |
114 | DEBUGF 1, "TCP_input: size=%u time=%d\n", ecx, [timer_ticks] |
| Line 113... | Line 115... | ||
| 113 | 115 | ||
| Line 137... | Line 139... | ||
| 137 | jb .drop_no_socket ; If not, drop the packet |
139 | jb .drop_no_socket ; If not, drop the packet |
| 138 | mov [dataoffset], eax |
140 | mov [dataoffset], eax |
| Line 139... | Line 141... | ||
| 139 | 141 | ||
| 140 | sub ecx, eax ; substract TCP header size from total segment size |
142 | sub ecx, eax ; substract TCP header size from total segment size |
| 141 | jb .drop_no_socket ; If total segment size is less then the advertised header size, drop packet |
143 | jb .drop_no_socket ; If total segment size is less then the advertised header size, drop packet |
| Line 142... | Line 144... | ||
| 142 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: %u bytes of data\n", ecx |
144 | DEBUGF 1, "TCP_input: %u bytes of data\n", ecx |
| 143 | 145 | ||
| Line 144... | Line 146... | ||
| 144 | ;------------------------------------------- |
146 | ;------------------------------------------- |
| Line 199... | Line 201... | ||
| 199 | pusha |
201 | pusha |
| 200 | mov ecx, socket_mutex |
202 | mov ecx, socket_mutex |
| 201 | call mutex_unlock |
203 | call mutex_unlock |
| 202 | popa |
204 | popa |
| Line 203... | Line 205... | ||
| 203 | 205 | ||
| Line 204... | Line 206... | ||
| 204 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: socket ptr=%x state=%u flags=%x\n", ebx, [ebx + TCP_SOCKET.t_state], [edx + TCP_header.Flags]:2 |
206 | DEBUGF 1, "TCP_input: socket ptr=%x state=%u flags=%x\n", ebx, [ebx + TCP_SOCKET.t_state], [edx + TCP_header.Flags]:2 |
| 205 | 207 | ||
| Line 206... | Line 208... | ||
| 206 | ;---------------------------- |
208 | ;---------------------------- |
| Line 215... | Line 217... | ||
| 215 | pusha |
217 | pusha |
| 216 | lea ecx, [ebx + SOCKET.mutex] |
218 | lea ecx, [ebx + SOCKET.mutex] |
| 217 | call mutex_lock |
219 | call mutex_lock |
| 218 | popa |
220 | popa |
| Line 219... | Line 221... | ||
| 219 | 221 | ||
| Line 220... | Line 222... | ||
| 220 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: socket locked\n" |
222 | DEBUGF 1, "TCP_input: socket locked\n" |
| 221 | 223 | ||
| Line 222... | Line 224... | ||
| 222 | ;--------------------------- |
224 | ;--------------------------- |
| Line 241... | Line 243... | ||
| 241 | ;----------------------------------------------------------------------------------- |
243 | ;----------------------------------------------------------------------------------- |
| Line 242... | Line 244... | ||
| 242 | 244 | ||
| 243 | test [ebx + SOCKET.options], SO_ACCEPTCON |
245 | test [ebx + SOCKET.options], SO_ACCEPTCON |
| Line 244... | Line 246... | ||
| 244 | jz .no_accept |
246 | jz .no_accept |
| Line 245... | Line 247... | ||
| 245 | 247 | ||
| Line 246... | Line 248... | ||
| 246 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Accepting new connection\n" |
248 | DEBUGF 1, "TCP_input: Accepting new connection\n" |
| 247 | 249 | ||
| Line 298... | Line 300... | ||
| 298 | 300 | ||
| 299 | mov ecx, [dataoffset] |
301 | mov ecx, [dataoffset] |
| 300 | cmp ecx, sizeof.TCP_header ; Does header contain any options? |
302 | cmp ecx, sizeof.TCP_header ; Does header contain any options? |
| Line 301... | Line 303... | ||
| 301 | je .no_options |
303 | je .no_options |
| Line 302... | Line 304... | ||
| 302 | 304 | ||
| 303 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Segment has options\n" |
305 | DEBUGF 1, "TCP_input: Segment has options\n" |
| Line 304... | Line 306... | ||
| 304 | 306 | ||
| Line 321... | Line 323... | ||
| 321 | je .opt_sack_permit |
323 | je .opt_sack_permit |
| 322 | ; cmp al, TCP_OPT_SACK |
324 | ; cmp al, TCP_OPT_SACK |
| 323 | ; je .opt_sack |
325 | ; je .opt_sack |
| 324 | cmp al, TCP_OPT_TIMESTAMP |
326 | cmp al, TCP_OPT_TIMESTAMP |
| 325 | je .opt_timestamp |
327 | je .opt_timestamp |
| 326 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: unknown option:%u\n", al |
328 | DEBUGF 1, "TCP_input: unknown option:%u\n", al |
| 327 | jmp .no_options ; If we reach here, some unknown options were received, skip them all! |
329 | jmp .no_options ; If we reach here, some unknown options were received, skip them all! |
| Line 328... | Line 330... | ||
| 328 | 330 | ||
| 329 | .opt_maxseg: |
331 | .opt_maxseg: |
| 330 | lodsb |
332 | lodsb |
| Line 335... | Line 337... | ||
| 335 | jz @f |
337 | jz @f |
| Line 336... | Line 338... | ||
| 336 | 338 | ||
| 337 | xor eax, eax |
339 | xor eax, eax |
| 338 | lodsw |
340 | lodsw |
| 339 | rol ax, 8 |
341 | rol ax, 8 |
| 340 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Maxseg=%u\n", eax |
342 | DEBUGF 1, "TCP_input: Maxseg=%u\n", eax |
| 341 | call tcp_mss |
343 | call tcp_mss |
| 342 | @@: |
344 | @@: |
| Line 349... | Line 351... | ||
| 349 | jne .no_options |
351 | jne .no_options |
| Line 350... | Line 352... | ||
| 350 | 352 | ||
| 351 | test [edx + TCP_header.Flags], TH_SYN |
353 | test [edx + TCP_header.Flags], TH_SYN |
| Line 352... | Line 354... | ||
| 352 | jz @f |
354 | jz @f |
| 353 | 355 | ||
| Line 354... | Line 356... | ||
| 354 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Got window scale option\n" |
356 | DEBUGF 1, "TCP_input: Got window scale option\n" |
| 355 | or [ebx + TCP_SOCKET.t_flags], TF_RCVD_SCALE |
357 | or [ebx + TCP_SOCKET.t_flags], TF_RCVD_SCALE |
| 356 | 358 | ||
| Line 368... | Line 370... | ||
| 368 | jne .no_options |
370 | jne .no_options |
| Line 369... | Line 371... | ||
| 369 | 371 | ||
| 370 | test [edx + TCP_header.Flags], TH_SYN |
372 | test [edx + TCP_header.Flags], TH_SYN |
| Line 371... | Line 373... | ||
| 371 | jz @f |
373 | jz @f |
| 372 | 374 | ||
| Line 373... | Line 375... | ||
| 373 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Selective Acknowledgement permitted\n" |
375 | DEBUGF 1, "TCP_input: Selective Acknowledgement permitted\n" |
| 374 | or [ebx + TCP_SOCKET.t_flags], TF_SACK_PERMIT |
376 | or [ebx + TCP_SOCKET.t_flags], TF_SACK_PERMIT |
| Line 380... | Line 382... | ||
| 380 | .opt_timestamp: |
382 | .opt_timestamp: |
| 381 | lodsb |
383 | lodsb |
| 382 | cmp al, 10 ; length must be 10 |
384 | cmp al, 10 ; length must be 10 |
| 383 | jne .no_options |
385 | jne .no_options |
| Line 384... | Line 386... | ||
| 384 | 386 | ||
| Line 385... | Line 387... | ||
| 385 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Got timestamp option\n" |
387 | DEBUGF 1, "TCP_input: Got timestamp option\n" |
| 386 | 388 | ||
| 387 | test [edx + TCP_header.Flags], TH_SYN |
389 | test [edx + TCP_header.Flags], TH_SYN |
| 388 | jz @f |
390 | jz @f |
| Line 405... | Line 407... | ||
| 405 | test eax, eax |
407 | test eax, eax |
| 406 | jz .no_paws |
408 | jz .no_paws |
| 407 | cmp eax, [ebx + TCP_SOCKET.ts_val] |
409 | cmp eax, [ebx + TCP_SOCKET.ts_val] |
| 408 | jbe .no_paws |
410 | jbe .no_paws |
| Line 409... | Line 411... | ||
| 409 | 411 | ||
| Line 410... | Line 412... | ||
| 410 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: PAWS: detected an old segment\n" |
412 | DEBUGF 1, "TCP_input: PAWS: detected an old segment\n" |
| 411 | 413 | ||
| Line 412... | Line 414... | ||
| 412 | mov eax, [timestamp] |
414 | mov eax, [timestamp] |
| Line 495... | Line 497... | ||
| 495 | ; - The acknowledgment field in the segment is greater than the largest unacknowledged sequence number. |
497 | ; - The acknowledgment field in the segment is greater than the largest unacknowledged sequence number. |
| Line 496... | Line 498... | ||
| 496 | 498 | ||
| 497 | sub eax, [ebx + TCP_SOCKET.SND_UNA] |
499 | sub eax, [ebx + TCP_SOCKET.SND_UNA] |
| Line 498... | Line 500... | ||
| 498 | jbe .not_uni_xfer |
500 | jbe .not_uni_xfer |
| Line 499... | Line 501... | ||
| 499 | 501 | ||
| 500 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Header prediction: we are sender\n" |
502 | DEBUGF 1, "TCP_input: Header prediction: we are sender\n" |
| Line 501... | Line 503... | ||
| 501 | 503 | ||
| Line 579... | Line 581... | ||
| 579 | cmp [ebx + TCP_SOCKET.seg_next], 0 |
581 | cmp [ebx + TCP_SOCKET.seg_next], 0 |
| 580 | jne .not_uni_xfer |
582 | jne .not_uni_xfer |
| Line 581... | Line 583... | ||
| 581 | 583 | ||
| Line 582... | Line 584... | ||
| 582 | ; Complete processing of received data |
584 | ; Complete processing of received data |
| Line 583... | Line 585... | ||
| 583 | 585 | ||
| 584 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Header prediction: we are receiving %u bytes\n", ecx |
586 | DEBUGF 1, "TCP_input: Header prediction: we are receiving %u bytes\n", ecx |
| 585 | 587 | ||
| 586 | mov esi, [dataoffset] |
588 | mov esi, [dataoffset] |
| 587 | add esi, edx |
589 | add esi, edx |
| Line 588... | Line 590... | ||
| 588 | lea eax, [ebx + STREAM_SOCKET.rcv] |
590 | lea eax, [ebx + STREAM_SOCKET.rcv] |
| - | 591 | call socket_ring_write ; Add the data to the socket buffer |
|
| 589 | call socket_ring_write ; Add the data to the socket buffer |
592 | add [ebx + TCP_SOCKET.RCV_NXT], ecx ; Update sequence number with number of bytes we have copied |
| Line 590... | Line 593... | ||
| 590 | add [ebx + TCP_SOCKET.RCV_NXT], ecx ; Update sequence number with number of bytes we have copied |
593 | |
| Line 591... | Line 594... | ||
| 591 | 594 | mov eax, ebx |
|
| Line 602... | Line 605... | ||
| 602 | ; TCP segment processing, the slow way |
605 | ; TCP segment processing, the slow way |
| 603 | ; |
606 | ; |
| 604 | ;----------------------------------------------------------------------------------- |
607 | ;----------------------------------------------------------------------------------- |
| Line 605... | Line 608... | ||
| 605 | 608 | ||
| 606 | .not_uni_xfer: |
609 | .not_uni_xfer: |
| Line 607... | Line 610... | ||
| 607 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Header prediction failed\n" |
610 | DEBUGF 1, "TCP_input: Header prediction failed\n" |
| Line 608... | Line 611... | ||
| 608 | 611 | ||
| 609 | ; Calculate receive window size |
612 | ; Calculate receive window size |
| 610 | 613 | ||
| 611 | push edx |
614 | push edx |
| 612 | mov eax, SOCKET_BUFFER_SIZE |
615 | mov eax, SOCKET_BUFFER_SIZE |
| 613 | sub eax, [ebx + STREAM_SOCKET.rcv.size] |
616 | sub eax, [ebx + STREAM_SOCKET.rcv.size] |
| 614 | DEBUGF DEBUG_NETWORK_VERBOSE, "Space in receive buffer=%d\n", eax |
617 | DEBUGF 1, "Space in receive buffer=%d\n", eax |
| 615 | mov edx, [ebx + TCP_SOCKET.RCV_ADV] |
618 | mov edx, [ebx + TCP_SOCKET.RCV_ADV] |
| 616 | sub edx, [ebx + TCP_SOCKET.RCV_NXT] |
619 | sub edx, [ebx + TCP_SOCKET.RCV_NXT] |
| 617 | DEBUGF DEBUG_NETWORK_VERBOSE, "Current advertised window=%d\n", edx |
620 | DEBUGF 1, "Current advertised window=%d\n", edx |
| 618 | cmp eax, edx |
621 | cmp eax, edx |
| 619 | jg @f |
622 | jg @f |
| 620 | mov eax, edx |
623 | mov eax, edx |
| 621 | @@: |
624 | @@: |
| Line 622... | Line 625... | ||
| 622 | DEBUGF DEBUG_NETWORK_VERBOSE, "Receive window size=%d\n", eax |
625 | DEBUGF 1, "Receive window size=%d\n", eax |
| Line 644... | Line 647... | ||
| 644 | 647 | ||
| 645 | mov eax, [ebx + TCP_SOCKET.RCV_NXT] |
648 | mov eax, [ebx + TCP_SOCKET.RCV_NXT] |
| 646 | sub eax, [edx + TCP_header.SequenceNumber] |
649 | sub eax, [edx + TCP_header.SequenceNumber] |
| Line 647... | Line 650... | ||
| 647 | jle .no_duplicate |
650 | jle .no_duplicate |
| Line 648... | Line 651... | ||
| 648 | 651 | ||
| Line 649... | Line 652... | ||
| 649 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: %u bytes duplicate data!\n", eax |
652 | DEBUGF 1, "TCP_input: %u bytes duplicate data!\n", eax |
| 650 | 653 | ||
| Line 651... | Line 654... | ||
| 651 | ; Check for duplicate SYN |
654 | ; Check for duplicate SYN |
| Line 652... | Line 655... | ||
| 652 | 655 | ||
| 653 | test [edx + TCP_header.Flags], TH_SYN |
656 | test [edx + TCP_header.Flags], TH_SYN |
| Line 654... | Line 657... | ||
| 654 | jz .no_dup_syn |
657 | jz .no_dup_syn |
| Line 698... | Line 701... | ||
| 698 | .dup_processed: |
701 | .dup_processed: |
| Line 699... | Line 702... | ||
| 699 | 702 | ||
| 700 | ;----------------------------------------------- |
703 | ;----------------------------------------------- |
| Line 701... | Line 704... | ||
| 701 | ; Remove duplicate data and update urgent offset |
704 | ; Remove duplicate data and update urgent offset |
| Line 702... | Line 705... | ||
| 702 | 705 | ||
| Line 703... | Line 706... | ||
| 703 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: trimming duplicate data\n" |
706 | DEBUGF 1, "TCP_input: trimming duplicate data\n" |
| 704 | 707 | ||
| Line 738... | Line 741... | ||
| 738 | add eax, ecx |
741 | add eax, ecx |
| 739 | sub eax, [ebx + TCP_SOCKET.RCV_NXT] |
742 | sub eax, [ebx + TCP_SOCKET.RCV_NXT] |
| 740 | sub eax, [ebx + TCP_SOCKET.RCV_WND] ; eax now holds the number of bytes to drop |
743 | sub eax, [ebx + TCP_SOCKET.RCV_WND] ; eax now holds the number of bytes to drop |
| 741 | jle .no_excess_data |
744 | jle .no_excess_data |
| Line 742... | Line 745... | ||
| 742 | 745 | ||
| Line 743... | Line 746... | ||
| 743 | DEBUGF DEBUG_NETWORK_VERBOSE, "%d bytes beyond right edge of window\n", eax |
746 | DEBUGF 1, "%d bytes beyond right edge of window\n", eax |
| Line 744... | Line 747... | ||
| 744 | 747 | ||
| 745 | inc [TCPS_rcvpackafterwin] |
748 | inc [TCPS_rcvpackafterwin] |
| Line 776... | Line 779... | ||
| 776 | 779 | ||
| 777 | or [ebx + TCP_SOCKET.t_flags], TF_ACKNOW |
780 | or [ebx + TCP_SOCKET.t_flags], TF_ACKNOW |
| 778 | inc [TCPS_rcvwinprobe] |
781 | inc [TCPS_rcvwinprobe] |
| 779 | .dont_drop_all: |
782 | .dont_drop_all: |
| 780 | add [TCPS_rcvbyteafterwin], eax |
783 | add [TCPS_rcvbyteafterwin], eax |
| Line 781... | Line 784... | ||
| 781 | DEBUGF DEBUG_NETWORK_VERBOSE, "Trimming %u bytes from the right of the window\n" |
784 | DEBUGF 1, "Trimming %u bytes from the right of the window\n" |
| Line 782... | Line 785... | ||
| 782 | 785 | ||
| 783 | ; remove data from the right side of window (decrease data length) |
786 | ; remove data from the right side of window (decrease data length) |
| Line 804... | Line 807... | ||
| 804 | dec eax |
807 | dec eax |
| 805 | @@: |
808 | @@: |
| 806 | sub eax, ecx |
809 | sub eax, ecx |
| 807 | jae .no_timestamp |
810 | jae .no_timestamp |
| Line 808... | Line 811... | ||
| 808 | 811 | ||
| Line 809... | Line 812... | ||
| 809 | DEBUGF DEBUG_NETWORK_VERBOSE, "Recording timestamp\n" |
812 | DEBUGF 1, "Recording timestamp\n" |
| 810 | 813 | ||
| 811 | mov eax, [timestamp] |
814 | mov eax, [timestamp] |
| 812 | mov [ebx + TCP_SOCKET.ts_recent_age], eax |
815 | mov [ebx + TCP_SOCKET.ts_recent_age], eax |
| Line 821... | Line 824... | ||
| 821 | ;----------------------------------------------------------------------------------- |
824 | ;----------------------------------------------------------------------------------- |
| Line 822... | Line 825... | ||
| 822 | 825 | ||
| 823 | test [edx + TCP_header.Flags], TH_RST |
826 | test [edx + TCP_header.Flags], TH_RST |
| Line 824... | Line 827... | ||
| 824 | jz .no_rst |
827 | jz .no_rst |
| Line 825... | Line 828... | ||
| 825 | 828 | ||
| 826 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Got an RST flag\n" |
829 | DEBUGF 1, "TCP_input: Got an RST flag\n" |
| 827 | 830 | ||
| Line 843... | Line 846... | ||
| 843 | dd .econnreset ; TCPS_FIN_WAIT_2 |
846 | dd .econnreset ; TCPS_FIN_WAIT_2 |
| 844 | dd .rst_close ; TCPS_TIME_WAIT |
847 | dd .rst_close ; TCPS_TIME_WAIT |
| Line 845... | Line 848... | ||
| 845 | 848 | ||
| 846 | ;----------------------------------------------------------------------------------- |
849 | ;----------------------------------------------------------------------------------- |
| 847 | .econnrefused: |
850 | .econnrefused: |
| 848 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Connection refused\n" |
851 | DEBUGF 1, "TCP_input: Connection refused\n" |
| 849 | mov [ebx + SOCKET.errorcode], ECONNREFUSED |
852 | mov [ebx + SOCKET.errorcode], ECONNREFUSED |
| Line 850... | Line 853... | ||
| 850 | jmp .close |
853 | jmp .close |
| 851 | 854 | ||
| 852 | ;----------------------------------------------------------------------------------- |
855 | ;----------------------------------------------------------------------------------- |
| 853 | .econnreset: |
856 | .econnreset: |
| 854 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Connection reset\n" |
857 | DEBUGF 1, "TCP_input: Connection reset\n" |
| 855 | mov [ebx + SOCKET.errorcode], ECONNRESET |
858 | mov [ebx + SOCKET.errorcode], ECONNRESET |
| 856 | .close: |
859 | .close: |
| 857 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Closing connection\n" |
860 | DEBUGF 1, "TCP_input: Closing connection\n" |
| Line 858... | Line 861... | ||
| 858 | mov [ebx + TCP_SOCKET.t_state], TCPS_CLOSED |
861 | mov [ebx + TCP_SOCKET.t_state], TCPS_CLOSED |
| Line 859... | Line 862... | ||
| 859 | inc [TCPS_drops] |
862 | inc [TCPS_drops] |
| 860 | 863 | ||
| 861 | 864 | ||
| 862 | jmp .drop |
865 | jmp .drop |
| Line 863... | Line 866... | ||
| 863 | 866 | ||
| 864 | ;----------------------------------------------------------------------------------- |
867 | ;----------------------------------------------------------------------------------- |
| Line 899... | Line 902... | ||
| 899 | 902 | ||
| 900 | cmp [ebx + TCP_SOCKET.t_state], TCPS_SYN_RECEIVED |
903 | cmp [ebx + TCP_SOCKET.t_state], TCPS_SYN_RECEIVED |
| 901 | jb .ack_processed ; states: closed, listen, syn_sent |
904 | jb .ack_processed ; states: closed, listen, syn_sent |
| Line 902... | Line 905... | ||
| 902 | ja .no_syn_rcv ; established, fin_wait_1, fin_wait_2, close_wait, closing, last_ack, time_wait |
905 | ja .no_syn_rcv ; established, fin_wait_1, fin_wait_2, close_wait, closing, last_ack, time_wait |
| Line 903... | Line 906... | ||
| 903 | 906 | ||
| 904 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: state=syn_received\n" |
907 | DEBUGF 1, "TCP_input: state=syn_received\n" |
| 905 | 908 | ||
| 906 | mov eax, [edx + TCP_header.AckNumber] |
909 | mov eax, [edx + TCP_header.AckNumber] |
| Line 952... | Line 955... | ||
| 952 | mov eax, dword[edx + TCP_header.Window] |
955 | mov eax, dword[edx + TCP_header.Window] |
| 953 | cmp eax, [ebx + TCP_SOCKET.SND_WND] |
956 | cmp eax, [ebx + TCP_SOCKET.SND_WND] |
| 954 | jne .reset_dupacks |
957 | jne .reset_dupacks |
| Line 955... | Line 958... | ||
| 955 | 958 | ||
| 956 | inc [TCPS_rcvdupack] |
959 | inc [TCPS_rcvdupack] |
| Line 957... | Line 960... | ||
| 957 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Processing duplicate ACK\n" |
960 | DEBUGF 1, "TCP_input: Processing duplicate ACK\n" |
| 958 | 961 | ||
| 959 | ; If we have outstanding data, other than a window probe, this is a completely duplicate ACK |
962 | ; If we have outstanding data, other than a window probe, this is a completely duplicate ACK |
| Line 973... | Line 976... | ||
| 973 | inc [ebx + TCP_SOCKET.t_dupacks] |
976 | inc [ebx + TCP_SOCKET.t_dupacks] |
| 974 | cmp [ebx + TCP_SOCKET.t_dupacks], TCP_re_xmit_thresh |
977 | cmp [ebx + TCP_SOCKET.t_dupacks], TCP_re_xmit_thresh |
| 975 | jb .dup_ack_complete |
978 | jb .dup_ack_complete |
| 976 | ja .another_lost |
979 | ja .another_lost |
| Line 977... | Line 980... | ||
| 977 | 980 | ||
| Line 978... | Line 981... | ||
| 978 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Re-transmitting lost segment\n" |
981 | DEBUGF 1, "TCP_input: Re-transmitting lost segment\n" |
| Line 979... | Line 982... | ||
| 979 | 982 | ||
| 980 | push [ebx + TCP_SOCKET.SND_NXT] ; >>>> |
983 | push [ebx + TCP_SOCKET.SND_NXT] ; >>>> |
| Line 1036... | Line 1039... | ||
| 1036 | mov [ebx + TCP_SOCKET.SND_NXT], eax |
1039 | mov [ebx + TCP_SOCKET.SND_NXT], eax |
| 1037 | @@: |
1040 | @@: |
| 1038 | jmp .drop |
1041 | jmp .drop |
| Line 1039... | Line 1042... | ||
| 1039 | 1042 | ||
| 1040 | .another_lost: |
1043 | .another_lost: |
| Line 1041... | Line 1044... | ||
| 1041 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Increasing congestion window\n" |
1044 | DEBUGF 1, "TCP_input: Increasing congestion window\n" |
| 1042 | 1045 | ||
| Line 1043... | Line 1046... | ||
| 1043 | mov eax, [ebx + TCP_SOCKET.t_maxseg] |
1046 | mov eax, [ebx + TCP_SOCKET.t_maxseg] |
| Line 1094... | Line 1097... | ||
| 1094 | 1097 | ||
| 1095 | mov edi, [edx + TCP_header.AckNumber] |
1098 | mov edi, [edx + TCP_header.AckNumber] |
| 1096 | sub edi, [ebx + TCP_SOCKET.SND_UNA] ; now we got the number of acked bytes in edi |
1099 | sub edi, [ebx + TCP_SOCKET.SND_UNA] ; now we got the number of acked bytes in edi |
| 1097 | inc [TCPS_rcvackpack] |
1100 | inc [TCPS_rcvackpack] |
| 1098 | add [TCPS_rcvackbyte], edi |
1101 | add [TCPS_rcvackbyte], edi |
| Line 1099... | Line 1102... | ||
| 1099 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: acceptable ACK for %u bytes\n", edi |
1102 | DEBUGF 1, "TCP_input: acceptable ACK for %u bytes\n", edi |
| 1100 | 1103 | ||
| 1101 | ;----------------------------------------------------------------------------------- |
1104 | ;----------------------------------------------------------------------------------- |
| 1102 | ; |
1105 | ; |
| Line 1203... | Line 1206... | ||
| 1203 | sub [ebx + TCP_SOCKET.SND_WND], ecx |
1206 | sub [ebx + TCP_SOCKET.SND_WND], ecx |
| 1204 | lea eax, [ebx + STREAM_SOCKET.snd] |
1207 | lea eax, [ebx + STREAM_SOCKET.snd] |
| 1205 | call socket_ring_free |
1208 | call socket_ring_free |
| 1206 | pop ebx edx ecx |
1209 | pop ebx edx ecx |
| Line 1207... | Line 1210... | ||
| 1207 | 1210 | ||
| 1208 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: our FIN is acked\n" |
1211 | DEBUGF 1, "TCP_input: our FIN is acked\n" |
| 1209 | or [temp_bits], TCP_BIT_FIN_IS_ACKED |
1212 | or [temp_bits], TCP_BIT_FIN_IS_ACKED |
| 1210 | jmp .ack_complete |
1213 | jmp .ack_complete |
| Line 1211... | Line 1214... | ||
| 1211 | .no_fin_ack: |
1214 | .no_fin_ack: |
| Line 1329... | Line 1332... | ||
| 1329 | ; Initiation of Passive Open? |
1332 | ; Initiation of Passive Open? |
| 1330 | ; |
1333 | ; |
| 1331 | ;----------------------------------------------------------------------------------- |
1334 | ;----------------------------------------------------------------------------------- |
| Line 1332... | Line 1335... | ||
| 1332 | 1335 | ||
| 1333 | .state_listen: |
1336 | .state_listen: |
| Line 1334... | Line 1337... | ||
| 1334 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: state=listen\n" |
1337 | DEBUGF 1, "TCP_input: state=listen\n" |
| 1335 | 1338 | ||
| Line 1336... | Line 1339... | ||
| 1336 | test [edx + TCP_header.Flags], TH_RST |
1339 | test [edx + TCP_header.Flags], TH_RST |
| Line 1395... | Line 1398... | ||
| 1395 | ; Completion of active open? |
1398 | ; Completion of active open? |
| 1396 | ; |
1399 | ; |
| 1397 | ;----------------------------------------------------------------------------------- |
1400 | ;----------------------------------------------------------------------------------- |
| Line 1398... | Line 1401... | ||
| 1398 | 1401 | ||
| 1399 | .state_syn_sent: |
1402 | .state_syn_sent: |
| Line 1400... | Line 1403... | ||
| 1400 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: state=syn_sent\n" |
1403 | DEBUGF 1, "TCP_input: state=syn_sent\n" |
| 1401 | 1404 | ||
| Line 1402... | Line 1405... | ||
| 1402 | test [edx + TCP_header.Flags], TH_ACK |
1405 | test [edx + TCP_header.Flags], TH_ACK |
| Line 1455... | Line 1458... | ||
| 1455 | jbe .simultaneous_open |
1458 | jbe .simultaneous_open |
| Line 1456... | Line 1459... | ||
| 1456 | 1459 | ||
| 1457 | test [edx + TCP_header.Flags], TH_ACK |
1460 | test [edx + TCP_header.Flags], TH_ACK |
| Line 1458... | Line 1461... | ||
| 1458 | jz .simultaneous_open |
1461 | jz .simultaneous_open |
| Line 1459... | Line 1462... | ||
| 1459 | 1462 | ||
| Line 1460... | Line 1463... | ||
| 1460 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: active open\n" |
1463 | DEBUGF 1, "TCP_input: active open\n" |
| Line 1496... | Line 1499... | ||
| 1496 | ; Simultaneous open (We have received a SYN but no ACK) |
1499 | ; Simultaneous open (We have received a SYN but no ACK) |
| 1497 | ; |
1500 | ; |
| 1498 | ;----------------------------------------------------------------------------------- |
1501 | ;----------------------------------------------------------------------------------- |
| Line 1499... | Line 1502... | ||
| 1499 | 1502 | ||
| 1500 | .simultaneous_open: |
1503 | .simultaneous_open: |
| 1501 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: simultaneous open\n" |
1504 | DEBUGF 1, "TCP_input: simultaneous open\n" |
| Line 1502... | Line 1505... | ||
| 1502 | mov [ebx + TCP_SOCKET.t_state], TCPS_SYN_RECEIVED |
1505 | mov [ebx + TCP_SOCKET.t_state], TCPS_SYN_RECEIVED |
| 1503 | 1506 | ||
| 1504 | ;----------------------------------------------------------------------------------- |
1507 | ;----------------------------------------------------------------------------------- |
| Line 1516... | Line 1519... | ||
| 1516 | ; Drop any received data that doesnt fit in the receive window. |
1519 | ; Drop any received data that doesnt fit in the receive window. |
| Line 1517... | Line 1520... | ||
| 1517 | 1520 | ||
| 1518 | cmp ecx, [ebx + TCP_SOCKET.RCV_WND] |
1521 | cmp ecx, [ebx + TCP_SOCKET.RCV_WND] |
| Line 1519... | Line 1522... | ||
| 1519 | jbe .dont_trim |
1522 | jbe .dont_trim |
| 1520 | 1523 | ||
| 1521 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: received data does not fit in window, trimming %u bytes\n", eax |
1524 | DEBUGF 1, "TCP_input: received data does not fit in window, trimming %u bytes\n", eax |
| 1522 | inc [TCPS_rcvpackafterwin] |
1525 | inc [TCPS_rcvpackafterwin] |
| Line 1523... | Line 1526... | ||
| 1523 | sub ecx, [ebx + TCP_SOCKET.RCV_WND] |
1526 | sub ecx, [ebx + TCP_SOCKET.RCV_WND] |
| Line 1537... | Line 1540... | ||
| 1537 | ; Update window information (step 6 in RFC793) |
1540 | ; Update window information (step 6 in RFC793) |
| 1538 | ; |
1541 | ; |
| 1539 | ;----------------------------------------------------------------------------------- |
1542 | ;----------------------------------------------------------------------------------- |
| Line 1540... | Line 1543... | ||
| 1540 | 1543 | ||
| 1541 | .ack_processed: |
1544 | .ack_processed: |
| Line 1542... | Line 1545... | ||
| 1542 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: ACK processed\n" |
1545 | DEBUGF 1, "TCP_input: ACK processed\n" |
| Line 1543... | Line 1546... | ||
| 1543 | 1546 | ||
| 1544 | ; dont look at window if no ACK |
1547 | ; dont look at window if no ACK |
| Line 1589... | Line 1592... | ||
| 1589 | cmp eax, [ebx + TCP_SOCKET.max_sndwnd] |
1592 | cmp eax, [ebx + TCP_SOCKET.max_sndwnd] |
| 1590 | jbe @f |
1593 | jbe @f |
| 1591 | mov [ebx + TCP_SOCKET.max_sndwnd], eax |
1594 | mov [ebx + TCP_SOCKET.max_sndwnd], eax |
| 1592 | @@: |
1595 | @@: |
| Line 1593... | Line 1596... | ||
| 1593 | 1596 | ||
| Line 1594... | Line 1597... | ||
| 1594 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Updating window to %u\n", eax |
1597 | DEBUGF 1, "TCP_input: Updating window to %u\n", eax |
| 1595 | 1598 | ||
| Line 1596... | Line 1599... | ||
| 1596 | push [edx + TCP_header.SequenceNumber] |
1599 | push [edx + TCP_header.SequenceNumber] |
| Line 1685... | Line 1688... | ||
| 1685 | call socket_notify |
1688 | call socket_notify |
| Line 1686... | Line 1689... | ||
| 1686 | 1689 | ||
| Line 1687... | Line 1690... | ||
| 1687 | jmp .data_done |
1690 | jmp .data_done |
| 1688 | 1691 | ||
| 1689 | .out_of_order: |
1692 | .out_of_order: |
| Line 1690... | Line 1693... | ||
| 1690 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP data is out of order!\nSequencenumber is %u, we expected %u.\n", \ |
1693 | DEBUGF 1, "TCP data is out of order!\nSequencenumber is %u, we expected %u.\n", \ |
| Line 1691... | Line 1694... | ||
| 1691 | [edx + TCP_header.SequenceNumber], [ebx + TCP_SOCKET.RCV_NXT] |
1694 | [edx + TCP_header.SequenceNumber], [ebx + TCP_SOCKET.RCV_NXT] |
| Line 1707... | Line 1710... | ||
| 1707 | ;----------------------------------------------------------------------------------- |
1710 | ;----------------------------------------------------------------------------------- |
| Line 1708... | Line 1711... | ||
| 1708 | 1711 | ||
| 1709 | test [edx + TCP_header.Flags], TH_FIN |
1712 | test [edx + TCP_header.Flags], TH_FIN |
| Line 1710... | Line 1713... | ||
| 1710 | jz .final_processing |
1713 | jz .final_processing |
| Line 1711... | Line 1714... | ||
| 1711 | 1714 | ||
| 1712 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Processing FIN\n" |
1715 | DEBUGF 1, "TCP_input: Processing FIN\n" |
| Line 1713... | Line 1716... | ||
| 1713 | 1716 | ||
| Line 1714... | Line 1717... | ||
| 1714 | cmp [ebx + TCP_SOCKET.t_state], TCPS_TIME_WAIT |
1717 | cmp [ebx + TCP_SOCKET.t_state], TCPS_TIME_WAIT |
| 1715 | jae .not_first_fin |
1718 | jae .not_first_fin |
| Line 1716... | Line 1719... | ||
| 1716 | 1719 | ||
| Line 1773... | Line 1776... | ||
| 1773 | ; Finally, drop the segment |
1776 | ; Finally, drop the segment |
| 1774 | ; |
1777 | ; |
| 1775 | ;----------------------------------------------------------------------------------- |
1778 | ;----------------------------------------------------------------------------------- |
| Line 1776... | Line 1779... | ||
| 1776 | 1779 | ||
| 1777 | .final_processing: |
1780 | .final_processing: |
| Line 1778... | Line 1781... | ||
| 1778 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Final processing\n" |
1781 | DEBUGF 1, "TCP_input: Final processing\n" |
| 1779 | 1782 | ||
| 1780 | push ebx |
1783 | push ebx |
| 1781 | lea ecx, [ebx + SOCKET.mutex] |
1784 | lea ecx, [ebx + SOCKET.mutex] |
| Line 1785... | Line 1788... | ||
| 1785 | test [temp_bits], TCP_BIT_NEEDOUTPUT |
1788 | test [temp_bits], TCP_BIT_NEEDOUTPUT |
| 1786 | jnz .need_output |
1789 | jnz .need_output |
| Line 1787... | Line 1790... | ||
| 1787 | 1790 | ||
| 1788 | test [eax + TCP_SOCKET.t_flags], TF_ACKNOW |
1791 | test [eax + TCP_SOCKET.t_flags], TF_ACKNOW |
| 1789 | jz .done |
1792 | jz .done |
| Line 1790... | Line 1793... | ||
| 1790 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: ACK now!\n" |
1793 | DEBUGF 1, "TCP_input: ACK now!\n" |
| 1791 | 1794 | ||
| 1792 | .need_output: |
1795 | .need_output: |
| Line 1793... | Line 1796... | ||
| 1793 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: need output\n" |
1796 | DEBUGF 1, "TCP_input: need output\n" |
| 1794 | call tcp_output |
1797 | call tcp_output |
| Line 1795... | Line 1798... | ||
| 1795 | 1798 | ||
| 1796 | .done: |
1799 | .done: |
| Line 1797... | Line 1800... | ||
| 1797 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: dumping\n" |
1800 | DEBUGF 1, "TCP_input: dumping\n" |
| Line 1805... | Line 1808... | ||
| 1805 | ; |
1808 | ; |
| 1806 | ;----------------------------------------------------------------------------------- |
1809 | ;----------------------------------------------------------------------------------- |
| Line 1807... | Line 1810... | ||
| 1807 | 1810 | ||
| 1808 | ;----------------------------------------------------------------------------------- |
1811 | ;----------------------------------------------------------------------------------- |
| 1809 | .drop_after_ack: |
1812 | .drop_after_ack: |
| Line 1810... | Line 1813... | ||
| 1810 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Drop after ACK\n" |
1813 | DEBUGF 1, "TCP_input: Drop after ACK\n" |
| 1811 | 1814 | ||
| 1812 | push edx ebx |
1815 | push edx ebx |
| 1813 | lea ecx, [ebx + SOCKET.mutex] |
1816 | lea ecx, [ebx + SOCKET.mutex] |
| Line 1820... | Line 1823... | ||
| 1820 | or [eax + TCP_SOCKET.t_flags], TF_ACKNOW |
1823 | or [eax + TCP_SOCKET.t_flags], TF_ACKNOW |
| 1821 | jmp .need_output |
1824 | jmp .need_output |
| Line 1822... | Line 1825... | ||
| 1822 | 1825 | ||
| 1823 | ;----------------------------------------------------------------------------------- |
1826 | ;----------------------------------------------------------------------------------- |
| 1824 | .drop_with_reset: |
1827 | .drop_with_reset: |
| Line 1825... | Line 1828... | ||
| 1825 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Drop with reset\n" |
1828 | DEBUGF 1, "TCP_input: Drop with reset\n" |
| 1826 | 1829 | ||
| 1827 | push ebx edx |
1830 | push ebx edx |
| 1828 | lea ecx, [ebx + SOCKET.mutex] |
1831 | lea ecx, [ebx + SOCKET.mutex] |
| Line 1892... | Line 1895... | ||
| 1892 | 1895 | ||
| 1893 | ;------------------------------------------------ |
1896 | ;------------------------------------------------ |
| Line 1894... | Line 1897... | ||
| 1894 | ; Unlock socket mutex and prepare to drop segment |
1897 | ; Unlock socket mutex and prepare to drop segment |
| 1895 | 1898 | ||
| Line 1896... | Line 1899... | ||
| 1896 | .drop: |
1899 | .drop: |
| 1897 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Dropping segment\n" |
1900 | DEBUGF 1, "TCP_input: Dropping segment\n" |
| 1898 | 1901 | ||
| 1899 | pusha |
1902 | pusha |
| Line 1913... | Line 1916... | ||
| 1913 | 1916 | ||
| 1914 | ;------------------ |
1917 | ;------------------ |
| Line 1915... | Line 1918... | ||
| 1915 | ; Drop the segment |
1918 | ; Drop the segment |
| 1916 | 1919 | ||
| Line 1917... | Line 1920... | ||
| 1917 | .drop_no_socket: |
1920 | .drop_no_socket: |
| 1918 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Drop (no socket)\n" |
1921 | DEBUGF 1, "TCP_input: Drop (no socket)\n" |
| Line 1919... | Line 1922... | ||
| 1919 | 1922 | ||