Rev 6907 | Rev 6910 | Go to most recent revision | Show entire file | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 6907 | Rev 6908 | ||
|---|---|---|---|
| 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: 6907 $ |
17 | $Revision: 6908 $ |
| 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 | DEBUGF 1, "tcp_input!\n" |
- | |
| - | 40 | ||
| 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 |
- | |
| 57 | ; DEBUGF 1, "Raising Event on TCP input\n" |
56 | xor esi, esi |
| Line 58... | Line 57... | ||
| 58 | call raise_event |
57 | call raise_event |
| Line 59... | Line 58... | ||
| 59 | 58 | ||
| Line 95... | Line 94... | ||
| 95 | 94 | ||
| 96 | .wait: |
95 | .wait: |
| 97 | mov eax, [TCP_input_event] |
96 | mov eax, [TCP_input_event] |
| 98 | mov ebx, [eax + EVENT.id] |
97 | mov ebx, [eax + EVENT.id] |
| 99 | call wait_event |
- | |
| Line 100... | Line 98... | ||
| 100 | DEBUGF 1, "Woke up with tcp_input_event\n" |
98 | call wait_event |
| 101 | 99 | ||
| Line 102... | Line 100... | ||
| 102 | .loop: |
100 | .loop: |
| Line 109... | Line 107... | ||
| 109 | mov ebx, [esi + TCP_queue_entry.device_ptr] |
107 | mov ebx, [esi + TCP_queue_entry.device_ptr] |
| 110 | mov ecx, [esi + TCP_queue_entry.segment_size] |
108 | mov ecx, [esi + TCP_queue_entry.segment_size] |
| 111 | mov edi, [esi + TCP_queue_entry.ip_ptr] ; ptr to ipv4 header |
109 | mov edi, [esi + TCP_queue_entry.ip_ptr] ; ptr to ipv4 header |
| 112 | mov esi, [esi + TCP_queue_entry.segment_ptr] ; change esi last |
110 | mov esi, [esi + TCP_queue_entry.segment_ptr] ; change esi last |
| Line 113... | Line 111... | ||
| 113 | 111 | ||
| Line 114... | Line 112... | ||
| 114 | DEBUGF 1, "TCP_input: size=%u time=%d\n", ecx, [timer_ticks] |
112 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: size=%u time=%d\n", ecx, [timer_ticks] |
| Line 115... | Line 113... | ||
| 115 | 113 | ||
| Line 139... | Line 137... | ||
| 139 | jb .drop_no_socket ; If not, drop the packet |
137 | jb .drop_no_socket ; If not, drop the packet |
| 140 | mov [dataoffset], eax |
138 | mov [dataoffset], eax |
| Line 141... | Line 139... | ||
| 141 | 139 | ||
| 142 | sub ecx, eax ; substract TCP header size from total segment size |
140 | sub ecx, eax ; substract TCP header size from total segment size |
| 143 | jb .drop_no_socket ; If total segment size is less then the advertised header size, drop packet |
141 | jb .drop_no_socket ; If total segment size is less then the advertised header size, drop packet |
| Line 144... | Line 142... | ||
| 144 | DEBUGF 1, "TCP_input: %u bytes of data\n", ecx |
142 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: %u bytes of data\n", ecx |
| 145 | 143 | ||
| Line 146... | Line 144... | ||
| 146 | ;------------------------------------------- |
144 | ;------------------------------------------- |
| Line 201... | Line 199... | ||
| 201 | pusha |
199 | pusha |
| 202 | mov ecx, socket_mutex |
200 | mov ecx, socket_mutex |
| 203 | call mutex_unlock |
201 | call mutex_unlock |
| 204 | popa |
202 | popa |
| Line 205... | Line 203... | ||
| 205 | 203 | ||
| Line 206... | Line 204... | ||
| 206 | DEBUGF 1, "TCP_input: socket ptr=%x state=%u flags=%x\n", ebx, [ebx + TCP_SOCKET.t_state], [edx + TCP_header.Flags]:2 |
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 |
| 207 | 205 | ||
| Line 208... | Line 206... | ||
| 208 | ;---------------------------- |
206 | ;---------------------------- |
| Line 217... | Line 215... | ||
| 217 | pusha |
215 | pusha |
| 218 | lea ecx, [ebx + SOCKET.mutex] |
216 | lea ecx, [ebx + SOCKET.mutex] |
| 219 | call mutex_lock |
217 | call mutex_lock |
| 220 | popa |
218 | popa |
| Line 221... | Line 219... | ||
| 221 | 219 | ||
| Line 222... | Line 220... | ||
| 222 | DEBUGF 1, "TCP_input: socket locked\n" |
220 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: socket locked\n" |
| 223 | 221 | ||
| Line 224... | Line 222... | ||
| 224 | ;--------------------------- |
222 | ;--------------------------- |
| Line 243... | Line 241... | ||
| 243 | ;----------------------------------------------------------------------------------- |
241 | ;----------------------------------------------------------------------------------- |
| Line 244... | Line 242... | ||
| 244 | 242 | ||
| 245 | test [ebx + SOCKET.options], SO_ACCEPTCON |
243 | test [ebx + SOCKET.options], SO_ACCEPTCON |
| Line 246... | Line 244... | ||
| 246 | jz .no_accept |
244 | jz .no_accept |
| Line 247... | Line 245... | ||
| 247 | 245 | ||
| Line 248... | Line 246... | ||
| 248 | DEBUGF 1, "TCP_input: Accepting new connection\n" |
246 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Accepting new connection\n" |
| 249 | 247 | ||
| Line 300... | Line 298... | ||
| 300 | 298 | ||
| 301 | mov ecx, [dataoffset] |
299 | mov ecx, [dataoffset] |
| 302 | cmp ecx, sizeof.TCP_header ; Does header contain any options? |
300 | cmp ecx, sizeof.TCP_header ; Does header contain any options? |
| Line 303... | Line 301... | ||
| 303 | je .no_options |
301 | je .no_options |
| Line 304... | Line 302... | ||
| 304 | 302 | ||
| 305 | DEBUGF 1, "TCP_input: Segment has options\n" |
303 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Segment has options\n" |
| Line 306... | Line 304... | ||
| 306 | 304 | ||
| Line 323... | Line 321... | ||
| 323 | je .opt_sack_permit |
321 | je .opt_sack_permit |
| 324 | ; cmp al, TCP_OPT_SACK |
322 | ; cmp al, TCP_OPT_SACK |
| 325 | ; je .opt_sack |
323 | ; je .opt_sack |
| 326 | cmp al, TCP_OPT_TIMESTAMP |
324 | cmp al, TCP_OPT_TIMESTAMP |
| 327 | je .opt_timestamp |
325 | je .opt_timestamp |
| 328 | DEBUGF 1, "TCP_input: unknown option:%u\n", al |
326 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: unknown option:%u\n", al |
| 329 | jmp .no_options ; If we reach here, some unknown options were received, skip them all! |
327 | jmp .no_options ; If we reach here, some unknown options were received, skip them all! |
| Line 330... | Line 328... | ||
| 330 | 328 | ||
| 331 | .opt_maxseg: |
329 | .opt_maxseg: |
| 332 | lodsb |
330 | lodsb |
| Line 337... | Line 335... | ||
| 337 | jz @f |
335 | jz @f |
| Line 338... | Line 336... | ||
| 338 | 336 | ||
| 339 | xor eax, eax |
337 | xor eax, eax |
| 340 | lodsw |
338 | lodsw |
| 341 | rol ax, 8 |
339 | rol ax, 8 |
| 342 | DEBUGF 1, "TCP_input: Maxseg=%u\n", eax |
340 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Maxseg=%u\n", eax |
| 343 | call tcp_mss |
341 | call tcp_mss |
| 344 | @@: |
342 | @@: |
| Line 351... | Line 349... | ||
| 351 | jne .no_options |
349 | jne .no_options |
| Line 352... | Line 350... | ||
| 352 | 350 | ||
| 353 | test [edx + TCP_header.Flags], TH_SYN |
351 | test [edx + TCP_header.Flags], TH_SYN |
| Line 354... | Line 352... | ||
| 354 | jz @f |
352 | jz @f |
| 355 | 353 | ||
| Line 356... | Line 354... | ||
| 356 | DEBUGF 1, "TCP_input: Got window scale option\n" |
354 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Got window scale option\n" |
| 357 | or [ebx + TCP_SOCKET.t_flags], TF_RCVD_SCALE |
355 | or [ebx + TCP_SOCKET.t_flags], TF_RCVD_SCALE |
| 358 | 356 | ||
| Line 370... | Line 368... | ||
| 370 | jne .no_options |
368 | jne .no_options |
| Line 371... | Line 369... | ||
| 371 | 369 | ||
| 372 | test [edx + TCP_header.Flags], TH_SYN |
370 | test [edx + TCP_header.Flags], TH_SYN |
| Line 373... | Line 371... | ||
| 373 | jz @f |
371 | jz @f |
| 374 | 372 | ||
| Line 375... | Line 373... | ||
| 375 | DEBUGF 1, "TCP_input: Selective Acknowledgement permitted\n" |
373 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Selective Acknowledgement permitted\n" |
| 376 | or [ebx + TCP_SOCKET.t_flags], TF_SACK_PERMIT |
374 | or [ebx + TCP_SOCKET.t_flags], TF_SACK_PERMIT |
| Line 382... | Line 380... | ||
| 382 | .opt_timestamp: |
380 | .opt_timestamp: |
| 383 | lodsb |
381 | lodsb |
| 384 | cmp al, 10 ; length must be 10 |
382 | cmp al, 10 ; length must be 10 |
| 385 | jne .no_options |
383 | jne .no_options |
| Line 386... | Line 384... | ||
| 386 | 384 | ||
| Line 387... | Line 385... | ||
| 387 | DEBUGF 1, "TCP_input: Got timestamp option\n" |
385 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Got timestamp option\n" |
| 388 | 386 | ||
| 389 | test [edx + TCP_header.Flags], TH_SYN |
387 | test [edx + TCP_header.Flags], TH_SYN |
| 390 | jz @f |
388 | jz @f |
| Line 407... | Line 405... | ||
| 407 | test eax, eax |
405 | test eax, eax |
| 408 | jz .no_paws |
406 | jz .no_paws |
| 409 | cmp eax, [ebx + TCP_SOCKET.ts_val] |
407 | cmp eax, [ebx + TCP_SOCKET.ts_val] |
| 410 | jbe .no_paws |
408 | jbe .no_paws |
| Line 411... | Line 409... | ||
| 411 | 409 | ||
| Line 412... | Line 410... | ||
| 412 | DEBUGF 1, "TCP_input: PAWS: detected an old segment\n" |
410 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: PAWS: detected an old segment\n" |
| 413 | 411 | ||
| Line 414... | Line 412... | ||
| 414 | mov eax, [timestamp] |
412 | mov eax, [timestamp] |
| Line 497... | Line 495... | ||
| 497 | ; - The acknowledgment field in the segment is greater than the largest unacknowledged sequence number. |
495 | ; - The acknowledgment field in the segment is greater than the largest unacknowledged sequence number. |
| Line 498... | Line 496... | ||
| 498 | 496 | ||
| 499 | sub eax, [ebx + TCP_SOCKET.SND_UNA] |
497 | sub eax, [ebx + TCP_SOCKET.SND_UNA] |
| Line 500... | Line 498... | ||
| 500 | jbe .not_uni_xfer |
498 | jbe .not_uni_xfer |
| Line 501... | Line 499... | ||
| 501 | 499 | ||
| 502 | DEBUGF 1, "TCP_input: Header prediction: we are sender\n" |
500 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Header prediction: we are sender\n" |
| Line 503... | Line 501... | ||
| 503 | 501 | ||
| Line 581... | Line 579... | ||
| 581 | cmp [ebx + TCP_SOCKET.seg_next], 0 |
579 | cmp [ebx + TCP_SOCKET.seg_next], 0 |
| 582 | jne .not_uni_xfer |
580 | jne .not_uni_xfer |
| Line 583... | Line 581... | ||
| 583 | 581 | ||
| Line 584... | Line 582... | ||
| 584 | ; Complete processing of received data |
582 | ; Complete processing of received data |
| Line 585... | Line 583... | ||
| 585 | 583 | ||
| 586 | DEBUGF 1, "TCP_input: Header prediction: we are receiving %u bytes\n", ecx |
584 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Header prediction: we are receiving %u bytes\n", ecx |
| 587 | 585 | ||
| 588 | mov esi, [dataoffset] |
586 | mov esi, [dataoffset] |
| 589 | add esi, edx |
587 | add esi, edx |
| Line 590... | Line 588... | ||
| 590 | lea eax, [ebx + STREAM_SOCKET.rcv] |
588 | lea eax, [ebx + STREAM_SOCKET.rcv] |
| 591 | 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 |
589 | call socket_ring_write ; Add the data to the socket buffer |
| Line 593... | Line 590... | ||
| 593 | 590 | add [ebx + TCP_SOCKET.RCV_NXT], ecx ; Update sequence number with number of bytes we have copied |
|
| Line 594... | Line 591... | ||
| 594 | mov eax, ebx |
591 | |
| Line 605... | Line 602... | ||
| 605 | ; TCP segment processing, the slow way |
602 | ; TCP segment processing, the slow way |
| 606 | ; |
603 | ; |
| 607 | ;----------------------------------------------------------------------------------- |
604 | ;----------------------------------------------------------------------------------- |
| Line 608... | Line 605... | ||
| 608 | 605 | ||
| 609 | .not_uni_xfer: |
606 | .not_uni_xfer: |
| Line 610... | Line 607... | ||
| 610 | DEBUGF 1, "TCP_input: Header prediction failed\n" |
607 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Header prediction failed\n" |
| Line 611... | Line 608... | ||
| 611 | 608 | ||
| 612 | ; Calculate receive window size |
609 | ; Calculate receive window size |
| 613 | 610 | ||
| 614 | push edx |
611 | push edx |
| 615 | mov eax, SOCKET_BUFFER_SIZE |
612 | mov eax, SOCKET_BUFFER_SIZE |
| 616 | sub eax, [ebx + STREAM_SOCKET.rcv.size] |
613 | sub eax, [ebx + STREAM_SOCKET.rcv.size] |
| 617 | DEBUGF 1, "Space in receive buffer=%d\n", eax |
614 | DEBUGF DEBUG_NETWORK_VERBOSE, "Space in receive buffer=%d\n", eax |
| 618 | mov edx, [ebx + TCP_SOCKET.RCV_ADV] |
615 | mov edx, [ebx + TCP_SOCKET.RCV_ADV] |
| 619 | sub edx, [ebx + TCP_SOCKET.RCV_NXT] |
616 | sub edx, [ebx + TCP_SOCKET.RCV_NXT] |
| 620 | DEBUGF 1, "Current advertised window=%d\n", edx |
617 | DEBUGF DEBUG_NETWORK_VERBOSE, "Current advertised window=%d\n", edx |
| 621 | cmp eax, edx |
618 | cmp eax, edx |
| 622 | jg @f |
619 | jg @f |
| 623 | mov eax, edx |
620 | mov eax, edx |
| 624 | @@: |
621 | @@: |
| Line 625... | Line 622... | ||
| 625 | DEBUGF 1, "Receive window size=%d\n", eax |
622 | DEBUGF DEBUG_NETWORK_VERBOSE, "Receive window size=%d\n", eax |
| Line 647... | Line 644... | ||
| 647 | 644 | ||
| 648 | mov eax, [ebx + TCP_SOCKET.RCV_NXT] |
645 | mov eax, [ebx + TCP_SOCKET.RCV_NXT] |
| 649 | sub eax, [edx + TCP_header.SequenceNumber] |
646 | sub eax, [edx + TCP_header.SequenceNumber] |
| Line 650... | Line 647... | ||
| 650 | jle .no_duplicate |
647 | jle .no_duplicate |
| Line 651... | Line 648... | ||
| 651 | 648 | ||
| Line 652... | Line 649... | ||
| 652 | DEBUGF 1, "TCP_input: %u bytes duplicate data!\n", eax |
649 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: %u bytes duplicate data!\n", eax |
| 653 | 650 | ||
| Line 654... | Line 651... | ||
| 654 | ; Check for duplicate SYN |
651 | ; Check for duplicate SYN |
| Line 655... | Line 652... | ||
| 655 | 652 | ||
| 656 | test [edx + TCP_header.Flags], TH_SYN |
653 | test [edx + TCP_header.Flags], TH_SYN |
| Line 657... | Line 654... | ||
| 657 | jz .no_dup_syn |
654 | jz .no_dup_syn |
| Line 701... | Line 698... | ||
| 701 | .dup_processed: |
698 | .dup_processed: |
| Line 702... | Line 699... | ||
| 702 | 699 | ||
| 703 | ;----------------------------------------------- |
700 | ;----------------------------------------------- |
| Line 704... | Line 701... | ||
| 704 | ; Remove duplicate data and update urgent offset |
701 | ; Remove duplicate data and update urgent offset |
| Line 705... | Line 702... | ||
| 705 | 702 | ||
| Line 706... | Line 703... | ||
| 706 | DEBUGF 1, "TCP_input: trimming duplicate data\n" |
703 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: trimming duplicate data\n" |
| 707 | 704 | ||
| Line 741... | Line 738... | ||
| 741 | add eax, ecx |
738 | add eax, ecx |
| 742 | sub eax, [ebx + TCP_SOCKET.RCV_NXT] |
739 | sub eax, [ebx + TCP_SOCKET.RCV_NXT] |
| 743 | sub eax, [ebx + TCP_SOCKET.RCV_WND] ; eax now holds the number of bytes to drop |
740 | sub eax, [ebx + TCP_SOCKET.RCV_WND] ; eax now holds the number of bytes to drop |
| 744 | jle .no_excess_data |
741 | jle .no_excess_data |
| Line 745... | Line 742... | ||
| 745 | 742 | ||
| Line 746... | Line 743... | ||
| 746 | DEBUGF 1, "%d bytes beyond right edge of window\n", eax |
743 | DEBUGF DEBUG_NETWORK_VERBOSE, "%d bytes beyond right edge of window\n", eax |
| Line 747... | Line 744... | ||
| 747 | 744 | ||
| 748 | inc [TCPS_rcvpackafterwin] |
745 | inc [TCPS_rcvpackafterwin] |
| Line 779... | Line 776... | ||
| 779 | 776 | ||
| 780 | or [ebx + TCP_SOCKET.t_flags], TF_ACKNOW |
777 | or [ebx + TCP_SOCKET.t_flags], TF_ACKNOW |
| 781 | inc [TCPS_rcvwinprobe] |
778 | inc [TCPS_rcvwinprobe] |
| 782 | .dont_drop_all: |
779 | .dont_drop_all: |
| 783 | add [TCPS_rcvbyteafterwin], eax |
780 | add [TCPS_rcvbyteafterwin], eax |
| Line 784... | Line 781... | ||
| 784 | DEBUGF 1, "Trimming %u bytes from the right of the window\n" |
781 | DEBUGF DEBUG_NETWORK_VERBOSE, "Trimming %u bytes from the right of the window\n" |
| Line 785... | Line 782... | ||
| 785 | 782 | ||
| 786 | ; remove data from the right side of window (decrease data length) |
783 | ; remove data from the right side of window (decrease data length) |
| Line 807... | Line 804... | ||
| 807 | dec eax |
804 | dec eax |
| 808 | @@: |
805 | @@: |
| 809 | sub eax, ecx |
806 | sub eax, ecx |
| 810 | jae .no_timestamp |
807 | jae .no_timestamp |
| Line 811... | Line 808... | ||
| 811 | 808 | ||
| Line 812... | Line 809... | ||
| 812 | DEBUGF 1, "Recording timestamp\n" |
809 | DEBUGF DEBUG_NETWORK_VERBOSE, "Recording timestamp\n" |
| 813 | 810 | ||
| 814 | mov eax, [timestamp] |
811 | mov eax, [timestamp] |
| 815 | mov [ebx + TCP_SOCKET.ts_recent_age], eax |
812 | mov [ebx + TCP_SOCKET.ts_recent_age], eax |
| Line 824... | Line 821... | ||
| 824 | ;----------------------------------------------------------------------------------- |
821 | ;----------------------------------------------------------------------------------- |
| Line 825... | Line 822... | ||
| 825 | 822 | ||
| 826 | test [edx + TCP_header.Flags], TH_RST |
823 | test [edx + TCP_header.Flags], TH_RST |
| Line 827... | Line 824... | ||
| 827 | jz .no_rst |
824 | jz .no_rst |
| Line 828... | Line 825... | ||
| 828 | 825 | ||
| 829 | DEBUGF 1, "TCP_input: Got an RST flag\n" |
826 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Got an RST flag\n" |
| 830 | 827 | ||
| Line 846... | Line 843... | ||
| 846 | dd .econnreset ; TCPS_FIN_WAIT_2 |
843 | dd .econnreset ; TCPS_FIN_WAIT_2 |
| 847 | dd .rst_close ; TCPS_TIME_WAIT |
844 | dd .rst_close ; TCPS_TIME_WAIT |
| Line 848... | Line 845... | ||
| 848 | 845 | ||
| 849 | ;----------------------------------------------------------------------------------- |
846 | ;----------------------------------------------------------------------------------- |
| 850 | .econnrefused: |
847 | .econnrefused: |
| 851 | DEBUGF 1, "TCP_input: Connection refused\n" |
848 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Connection refused\n" |
| 852 | mov [ebx + SOCKET.errorcode], ECONNREFUSED |
849 | mov [ebx + SOCKET.errorcode], ECONNREFUSED |
| Line 853... | Line 850... | ||
| 853 | jmp .close |
850 | jmp .close |
| 854 | 851 | ||
| 855 | ;----------------------------------------------------------------------------------- |
852 | ;----------------------------------------------------------------------------------- |
| 856 | .econnreset: |
853 | .econnreset: |
| 857 | DEBUGF 1, "TCP_input: Connection reset\n" |
854 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Connection reset\n" |
| 858 | mov [ebx + SOCKET.errorcode], ECONNRESET |
855 | mov [ebx + SOCKET.errorcode], ECONNRESET |
| 859 | .close: |
856 | .close: |
| 860 | DEBUGF 1, "TCP_input: Closing connection\n" |
857 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Closing connection\n" |
| Line 861... | Line 858... | ||
| 861 | mov [ebx + TCP_SOCKET.t_state], TCPS_CLOSED |
858 | mov [ebx + TCP_SOCKET.t_state], TCPS_CLOSED |
| Line 862... | Line 859... | ||
| 862 | inc [TCPS_drops] |
859 | inc [TCPS_drops] |
| 863 | 860 | ||
| 864 | 861 | ||
| 865 | jmp .drop |
862 | jmp .drop |
| Line 866... | Line 863... | ||
| 866 | 863 | ||
| 867 | ;----------------------------------------------------------------------------------- |
864 | ;----------------------------------------------------------------------------------- |
| Line 902... | Line 899... | ||
| 902 | 899 | ||
| 903 | cmp [ebx + TCP_SOCKET.t_state], TCPS_SYN_RECEIVED |
900 | cmp [ebx + TCP_SOCKET.t_state], TCPS_SYN_RECEIVED |
| 904 | jb .ack_processed ; states: closed, listen, syn_sent |
901 | jb .ack_processed ; states: closed, listen, syn_sent |
| Line 905... | Line 902... | ||
| 905 | ja .no_syn_rcv ; established, fin_wait_1, fin_wait_2, close_wait, closing, last_ack, time_wait |
902 | ja .no_syn_rcv ; established, fin_wait_1, fin_wait_2, close_wait, closing, last_ack, time_wait |
| Line 906... | Line 903... | ||
| 906 | 903 | ||
| 907 | DEBUGF 1, "TCP_input: state=syn_received\n" |
904 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: state=syn_received\n" |
| 908 | 905 | ||
| 909 | mov eax, [edx + TCP_header.AckNumber] |
906 | mov eax, [edx + TCP_header.AckNumber] |
| Line 955... | Line 952... | ||
| 955 | mov eax, dword[edx + TCP_header.Window] |
952 | mov eax, dword[edx + TCP_header.Window] |
| 956 | cmp eax, [ebx + TCP_SOCKET.SND_WND] |
953 | cmp eax, [ebx + TCP_SOCKET.SND_WND] |
| 957 | jne .reset_dupacks |
954 | jne .reset_dupacks |
| Line 958... | Line 955... | ||
| 958 | 955 | ||
| 959 | inc [TCPS_rcvdupack] |
956 | inc [TCPS_rcvdupack] |
| Line 960... | Line 957... | ||
| 960 | DEBUGF 1, "TCP_input: Processing duplicate ACK\n" |
957 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Processing duplicate ACK\n" |
| 961 | 958 | ||
| 962 | ; If we have outstanding data, other than a window probe, this is a completely duplicate ACK |
959 | ; If we have outstanding data, other than a window probe, this is a completely duplicate ACK |
| Line 976... | Line 973... | ||
| 976 | inc [ebx + TCP_SOCKET.t_dupacks] |
973 | inc [ebx + TCP_SOCKET.t_dupacks] |
| 977 | cmp [ebx + TCP_SOCKET.t_dupacks], TCP_re_xmit_thresh |
974 | cmp [ebx + TCP_SOCKET.t_dupacks], TCP_re_xmit_thresh |
| 978 | jb .dup_ack_complete |
975 | jb .dup_ack_complete |
| 979 | ja .another_lost |
976 | ja .another_lost |
| Line 980... | Line 977... | ||
| 980 | 977 | ||
| Line 981... | Line 978... | ||
| 981 | DEBUGF 1, "TCP_input: Re-transmitting lost segment\n" |
978 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Re-transmitting lost segment\n" |
| Line 982... | Line 979... | ||
| 982 | 979 | ||
| 983 | push [ebx + TCP_SOCKET.SND_NXT] ; >>>> |
980 | push [ebx + TCP_SOCKET.SND_NXT] ; >>>> |
| Line 1039... | Line 1036... | ||
| 1039 | mov [ebx + TCP_SOCKET.SND_NXT], eax |
1036 | mov [ebx + TCP_SOCKET.SND_NXT], eax |
| 1040 | @@: |
1037 | @@: |
| 1041 | jmp .drop |
1038 | jmp .drop |
| Line 1042... | Line 1039... | ||
| 1042 | 1039 | ||
| 1043 | .another_lost: |
1040 | .another_lost: |
| Line 1044... | Line 1041... | ||
| 1044 | DEBUGF 1, "TCP_input: Increasing congestion window\n" |
1041 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Increasing congestion window\n" |
| 1045 | 1042 | ||
| Line 1046... | Line 1043... | ||
| 1046 | mov eax, [ebx + TCP_SOCKET.t_maxseg] |
1043 | mov eax, [ebx + TCP_SOCKET.t_maxseg] |
| Line 1097... | Line 1094... | ||
| 1097 | 1094 | ||
| 1098 | mov edi, [edx + TCP_header.AckNumber] |
1095 | mov edi, [edx + TCP_header.AckNumber] |
| 1099 | sub edi, [ebx + TCP_SOCKET.SND_UNA] ; now we got the number of acked bytes in edi |
1096 | sub edi, [ebx + TCP_SOCKET.SND_UNA] ; now we got the number of acked bytes in edi |
| 1100 | inc [TCPS_rcvackpack] |
1097 | inc [TCPS_rcvackpack] |
| 1101 | add [TCPS_rcvackbyte], edi |
1098 | add [TCPS_rcvackbyte], edi |
| Line 1102... | Line 1099... | ||
| 1102 | DEBUGF 1, "TCP_input: acceptable ACK for %u bytes\n", edi |
1099 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: acceptable ACK for %u bytes\n", edi |
| 1103 | 1100 | ||
| 1104 | ;----------------------------------------------------------------------------------- |
1101 | ;----------------------------------------------------------------------------------- |
| 1105 | ; |
1102 | ; |
| Line 1206... | Line 1203... | ||
| 1206 | sub [ebx + TCP_SOCKET.SND_WND], ecx |
1203 | sub [ebx + TCP_SOCKET.SND_WND], ecx |
| 1207 | lea eax, [ebx + STREAM_SOCKET.snd] |
1204 | lea eax, [ebx + STREAM_SOCKET.snd] |
| 1208 | call socket_ring_free |
1205 | call socket_ring_free |
| 1209 | pop ebx edx ecx |
1206 | pop ebx edx ecx |
| Line 1210... | Line 1207... | ||
| 1210 | 1207 | ||
| 1211 | DEBUGF 1, "TCP_input: our FIN is acked\n" |
1208 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: our FIN is acked\n" |
| 1212 | or [temp_bits], TCP_BIT_FIN_IS_ACKED |
1209 | or [temp_bits], TCP_BIT_FIN_IS_ACKED |
| 1213 | jmp .ack_complete |
1210 | jmp .ack_complete |
| Line 1214... | Line 1211... | ||
| 1214 | .no_fin_ack: |
1211 | .no_fin_ack: |
| Line 1332... | Line 1329... | ||
| 1332 | ; Initiation of Passive Open? |
1329 | ; Initiation of Passive Open? |
| 1333 | ; |
1330 | ; |
| 1334 | ;----------------------------------------------------------------------------------- |
1331 | ;----------------------------------------------------------------------------------- |
| Line 1335... | Line 1332... | ||
| 1335 | 1332 | ||
| 1336 | .state_listen: |
1333 | .state_listen: |
| Line 1337... | Line 1334... | ||
| 1337 | DEBUGF 1, "TCP_input: state=listen\n" |
1334 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: state=listen\n" |
| 1338 | 1335 | ||
| Line 1339... | Line 1336... | ||
| 1339 | test [edx + TCP_header.Flags], TH_RST |
1336 | test [edx + TCP_header.Flags], TH_RST |
| Line 1398... | Line 1395... | ||
| 1398 | ; Completion of active open? |
1395 | ; Completion of active open? |
| 1399 | ; |
1396 | ; |
| 1400 | ;----------------------------------------------------------------------------------- |
1397 | ;----------------------------------------------------------------------------------- |
| Line 1401... | Line 1398... | ||
| 1401 | 1398 | ||
| 1402 | .state_syn_sent: |
1399 | .state_syn_sent: |
| Line 1403... | Line 1400... | ||
| 1403 | DEBUGF 1, "TCP_input: state=syn_sent\n" |
1400 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: state=syn_sent\n" |
| 1404 | 1401 | ||
| Line 1405... | Line 1402... | ||
| 1405 | test [edx + TCP_header.Flags], TH_ACK |
1402 | test [edx + TCP_header.Flags], TH_ACK |
| Line 1458... | Line 1455... | ||
| 1458 | jbe .simultaneous_open |
1455 | jbe .simultaneous_open |
| Line 1459... | Line 1456... | ||
| 1459 | 1456 | ||
| 1460 | test [edx + TCP_header.Flags], TH_ACK |
1457 | test [edx + TCP_header.Flags], TH_ACK |
| Line 1461... | Line 1458... | ||
| 1461 | jz .simultaneous_open |
1458 | jz .simultaneous_open |
| Line 1462... | Line 1459... | ||
| 1462 | 1459 | ||
| Line 1463... | Line 1460... | ||
| 1463 | DEBUGF 1, "TCP_input: active open\n" |
1460 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: active open\n" |
| Line 1499... | Line 1496... | ||
| 1499 | ; Simultaneous open (We have received a SYN but no ACK) |
1496 | ; Simultaneous open (We have received a SYN but no ACK) |
| 1500 | ; |
1497 | ; |
| 1501 | ;----------------------------------------------------------------------------------- |
1498 | ;----------------------------------------------------------------------------------- |
| Line 1502... | Line 1499... | ||
| 1502 | 1499 | ||
| 1503 | .simultaneous_open: |
1500 | .simultaneous_open: |
| 1504 | DEBUGF 1, "TCP_input: simultaneous open\n" |
1501 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: simultaneous open\n" |
| Line 1505... | Line 1502... | ||
| 1505 | mov [ebx + TCP_SOCKET.t_state], TCPS_SYN_RECEIVED |
1502 | mov [ebx + TCP_SOCKET.t_state], TCPS_SYN_RECEIVED |
| 1506 | 1503 | ||
| 1507 | ;----------------------------------------------------------------------------------- |
1504 | ;----------------------------------------------------------------------------------- |
| Line 1519... | Line 1516... | ||
| 1519 | ; Drop any received data that doesnt fit in the receive window. |
1516 | ; Drop any received data that doesnt fit in the receive window. |
| Line 1520... | Line 1517... | ||
| 1520 | 1517 | ||
| 1521 | cmp ecx, [ebx + TCP_SOCKET.RCV_WND] |
1518 | cmp ecx, [ebx + TCP_SOCKET.RCV_WND] |
| Line 1522... | Line 1519... | ||
| 1522 | jbe .dont_trim |
1519 | jbe .dont_trim |
| 1523 | 1520 | ||
| 1524 | DEBUGF 1, "TCP_input: received data does not fit in window, trimming %u bytes\n", eax |
1521 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: received data does not fit in window, trimming %u bytes\n", eax |
| 1525 | inc [TCPS_rcvpackafterwin] |
1522 | inc [TCPS_rcvpackafterwin] |
| Line 1526... | Line 1523... | ||
| 1526 | sub ecx, [ebx + TCP_SOCKET.RCV_WND] |
1523 | sub ecx, [ebx + TCP_SOCKET.RCV_WND] |
| Line 1540... | Line 1537... | ||
| 1540 | ; Update window information (step 6 in RFC793) |
1537 | ; Update window information (step 6 in RFC793) |
| 1541 | ; |
1538 | ; |
| 1542 | ;----------------------------------------------------------------------------------- |
1539 | ;----------------------------------------------------------------------------------- |
| Line 1543... | Line 1540... | ||
| 1543 | 1540 | ||
| 1544 | .ack_processed: |
1541 | .ack_processed: |
| Line 1545... | Line 1542... | ||
| 1545 | DEBUGF 1, "TCP_input: ACK processed\n" |
1542 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: ACK processed\n" |
| Line 1546... | Line 1543... | ||
| 1546 | 1543 | ||
| 1547 | ; dont look at window if no ACK |
1544 | ; dont look at window if no ACK |
| Line 1592... | Line 1589... | ||
| 1592 | cmp eax, [ebx + TCP_SOCKET.max_sndwnd] |
1589 | cmp eax, [ebx + TCP_SOCKET.max_sndwnd] |
| 1593 | jbe @f |
1590 | jbe @f |
| 1594 | mov [ebx + TCP_SOCKET.max_sndwnd], eax |
1591 | mov [ebx + TCP_SOCKET.max_sndwnd], eax |
| 1595 | @@: |
1592 | @@: |
| Line 1596... | Line 1593... | ||
| 1596 | 1593 | ||
| Line 1597... | Line 1594... | ||
| 1597 | DEBUGF 1, "TCP_input: Updating window to %u\n", eax |
1594 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Updating window to %u\n", eax |
| 1598 | 1595 | ||
| Line 1599... | Line 1596... | ||
| 1599 | push [edx + TCP_header.SequenceNumber] |
1596 | push [edx + TCP_header.SequenceNumber] |
| Line 1688... | Line 1685... | ||
| 1688 | call socket_notify |
1685 | call socket_notify |
| Line 1689... | Line 1686... | ||
| 1689 | 1686 | ||
| Line 1690... | Line 1687... | ||
| 1690 | jmp .data_done |
1687 | jmp .data_done |
| 1691 | 1688 | ||
| 1692 | .out_of_order: |
1689 | .out_of_order: |
| Line 1693... | Line 1690... | ||
| 1693 | DEBUGF 1, "TCP data is out of order!\nSequencenumber is %u, we expected %u.\n", \ |
1690 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP data is out of order!\nSequencenumber is %u, we expected %u.\n", \ |
| Line 1694... | Line 1691... | ||
| 1694 | [edx + TCP_header.SequenceNumber], [ebx + TCP_SOCKET.RCV_NXT] |
1691 | [edx + TCP_header.SequenceNumber], [ebx + TCP_SOCKET.RCV_NXT] |
| Line 1710... | Line 1707... | ||
| 1710 | ;----------------------------------------------------------------------------------- |
1707 | ;----------------------------------------------------------------------------------- |
| Line 1711... | Line 1708... | ||
| 1711 | 1708 | ||
| 1712 | test [edx + TCP_header.Flags], TH_FIN |
1709 | test [edx + TCP_header.Flags], TH_FIN |
| Line 1713... | Line 1710... | ||
| 1713 | jz .final_processing |
1710 | jz .final_processing |
| Line 1714... | Line 1711... | ||
| 1714 | 1711 | ||
| 1715 | DEBUGF 1, "TCP_input: Processing FIN\n" |
1712 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Processing FIN\n" |
| Line 1716... | Line 1713... | ||
| 1716 | 1713 | ||
| Line 1717... | Line 1714... | ||
| 1717 | cmp [ebx + TCP_SOCKET.t_state], TCPS_TIME_WAIT |
1714 | cmp [ebx + TCP_SOCKET.t_state], TCPS_TIME_WAIT |
| 1718 | jae .not_first_fin |
1715 | jae .not_first_fin |
| Line 1719... | Line 1716... | ||
| 1719 | 1716 | ||
| Line 1776... | Line 1773... | ||
| 1776 | ; Finally, drop the segment |
1773 | ; Finally, drop the segment |
| 1777 | ; |
1774 | ; |
| 1778 | ;----------------------------------------------------------------------------------- |
1775 | ;----------------------------------------------------------------------------------- |
| Line 1779... | Line 1776... | ||
| 1779 | 1776 | ||
| 1780 | .final_processing: |
1777 | .final_processing: |
| Line 1781... | Line 1778... | ||
| 1781 | DEBUGF 1, "TCP_input: Final processing\n" |
1778 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Final processing\n" |
| 1782 | 1779 | ||
| 1783 | push ebx |
1780 | push ebx |
| 1784 | lea ecx, [ebx + SOCKET.mutex] |
1781 | lea ecx, [ebx + SOCKET.mutex] |
| Line 1788... | Line 1785... | ||
| 1788 | test [temp_bits], TCP_BIT_NEEDOUTPUT |
1785 | test [temp_bits], TCP_BIT_NEEDOUTPUT |
| 1789 | jnz .need_output |
1786 | jnz .need_output |
| Line 1790... | Line 1787... | ||
| 1790 | 1787 | ||
| 1791 | test [eax + TCP_SOCKET.t_flags], TF_ACKNOW |
1788 | test [eax + TCP_SOCKET.t_flags], TF_ACKNOW |
| 1792 | jz .done |
1789 | jz .done |
| Line 1793... | Line 1790... | ||
| 1793 | DEBUGF 1, "TCP_input: ACK now!\n" |
1790 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: ACK now!\n" |
| 1794 | 1791 | ||
| 1795 | .need_output: |
1792 | .need_output: |
| Line 1796... | Line 1793... | ||
| 1796 | DEBUGF 1, "TCP_input: need output\n" |
1793 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: need output\n" |
| 1797 | call tcp_output |
1794 | call tcp_output |
| Line 1798... | Line 1795... | ||
| 1798 | 1795 | ||
| 1799 | .done: |
1796 | .done: |
| Line 1800... | Line 1797... | ||
| 1800 | DEBUGF 1, "TCP_input: dumping\n" |
1797 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: dumping\n" |
| Line 1808... | Line 1805... | ||
| 1808 | ; |
1805 | ; |
| 1809 | ;----------------------------------------------------------------------------------- |
1806 | ;----------------------------------------------------------------------------------- |
| Line 1810... | Line 1807... | ||
| 1810 | 1807 | ||
| 1811 | ;----------------------------------------------------------------------------------- |
1808 | ;----------------------------------------------------------------------------------- |
| 1812 | .drop_after_ack: |
1809 | .drop_after_ack: |
| Line 1813... | Line 1810... | ||
| 1813 | DEBUGF 1, "TCP_input: Drop after ACK\n" |
1810 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Drop after ACK\n" |
| 1814 | 1811 | ||
| 1815 | push edx ebx |
1812 | push edx ebx |
| 1816 | lea ecx, [ebx + SOCKET.mutex] |
1813 | lea ecx, [ebx + SOCKET.mutex] |
| Line 1823... | Line 1820... | ||
| 1823 | or [eax + TCP_SOCKET.t_flags], TF_ACKNOW |
1820 | or [eax + TCP_SOCKET.t_flags], TF_ACKNOW |
| 1824 | jmp .need_output |
1821 | jmp .need_output |
| Line 1825... | Line 1822... | ||
| 1825 | 1822 | ||
| 1826 | ;----------------------------------------------------------------------------------- |
1823 | ;----------------------------------------------------------------------------------- |
| 1827 | .drop_with_reset: |
1824 | .drop_with_reset: |
| Line 1828... | Line 1825... | ||
| 1828 | DEBUGF 1, "TCP_input: Drop with reset\n" |
1825 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Drop with reset\n" |
| 1829 | 1826 | ||
| 1830 | push ebx edx |
1827 | push ebx edx |
| 1831 | lea ecx, [ebx + SOCKET.mutex] |
1828 | lea ecx, [ebx + SOCKET.mutex] |
| Line 1895... | Line 1892... | ||
| 1895 | 1892 | ||
| 1896 | ;------------------------------------------------ |
1893 | ;------------------------------------------------ |
| Line 1897... | Line 1894... | ||
| 1897 | ; Unlock socket mutex and prepare to drop segment |
1894 | ; Unlock socket mutex and prepare to drop segment |
| 1898 | 1895 | ||
| Line 1899... | Line 1896... | ||
| 1899 | .drop: |
1896 | .drop: |
| 1900 | DEBUGF 1, "TCP_input: Dropping segment\n" |
1897 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Dropping segment\n" |
| 1901 | 1898 | ||
| 1902 | pusha |
1899 | pusha |
| Line 1916... | Line 1913... | ||
| 1916 | 1913 | ||
| 1917 | ;------------------ |
1914 | ;------------------ |
| Line 1918... | Line 1915... | ||
| 1918 | ; Drop the segment |
1915 | ; Drop the segment |
| 1919 | 1916 | ||
| Line 1920... | Line 1917... | ||
| 1920 | .drop_no_socket: |
1917 | .drop_no_socket: |
| 1921 | DEBUGF 1, "TCP_input: Drop (no socket)\n" |
1918 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Drop (no socket)\n" |
| Line 1922... | Line 1919... | ||
| 1922 | 1919 | ||