forked from KolibriOS/kolibrios
Bugfixes for #2937 (receive window calculation).
Disabled interrupts while in TCP_input or TCP_output to prevent deadlock. git-svn-id: svn://kolibrios.org@2942 a494cfbc-eb01-0410-851d-a64ba20cac60
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hidnplayr
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ac776f502e
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51263819d7
@ -34,11 +34,14 @@ $Revision$
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align 4
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TCP_input:
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pushfd
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cli
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DEBUGF 1,"TCP_input: size=%u\n", ecx
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; First, record the current time
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mov eax, [timer_ticks] ; in 1/100 seconds
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mov [esp+4], eax
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mov [esp+8], eax
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; then, re-calculate the checksum (if not already done by hw)
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; test [ebx + NET_DEVICE.hwacc], HWACC_TCP_IPv4_IN
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@ -214,7 +217,6 @@ TCP_input:
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movzx eax, word[esi+2]
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rol ax, 8
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DEBUGF 1,"TCP_input: Maxseg=%u\n", ax
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mov [ebx + TCP_SOCKET.t_maxseg], eax
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@@:
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@ -330,7 +332,7 @@ TCP_input:
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test [ebx + TCP_SOCKET.temp_bits], TCP_BIT_TIMESTAMP
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jz .no_timestamp_rtt
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mov eax, [esp + 4] ; timestamp when this segment was received
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mov eax, [esp + 4+4] ; timestamp when this segment was received
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sub eax, [ebx + TCP_SOCKET.ts_ecr]
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inc eax
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call TCP_xmit_timer
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@ -417,15 +419,18 @@ TCP_input:
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; Calculate receive window size
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push edx
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mov eax, SOCKETBUFFSIZE
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sub eax, [ebx + STREAM_SOCKET.rcv.size]
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mov edx, [ebx + TCP_SOCKET.RCV_ADV]
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sub edx, [ebx + TCP_SOCKET.RCV_NXT]
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cmp eax, edx
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ja @f
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jg @f
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mov eax, edx
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@@:
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DEBUGF 1,"Receive window size=%d\n", ax
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mov [ebx + TCP_SOCKET.RCV_WND], ax
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pop edx
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; If listen or Syn sent, go to that specific code right away
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@ -462,14 +467,14 @@ TCP_input:
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mov eax, [ebx + TCP_SOCKET.RCV_NXT]
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sub eax, [edx + TCP_header.SequenceNumber]
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jbe .no_duplicate
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jle .no_duplicate
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DEBUGF 1,"TCP_input: %u bytes duplicate data!\n", eax
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test [edx + TCP_header.Flags], TH_SYN
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jz .no_dup_syn
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; remove duplicate syn
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DEBUGF 1,"TCP_input: got duplicate syn\n"
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and [edx + TCP_header.Flags], not (TH_SYN)
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inc [edx + TCP_header.SequenceNumber]
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@ -511,7 +516,7 @@ TCP_input:
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sub ecx, eax
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sub [edx + TCP_header.UrgentPointer], ax
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ja @f
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jg @f
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and [edx + TCP_header.Flags], not (TH_URG)
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mov [edx + TCP_header.UrgentPointer], 0
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@@:
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@ -540,11 +545,13 @@ TCP_input:
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add eax, ecx
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sub eax, [ebx + TCP_SOCKET.RCV_NXT]
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sub ax, [ebx + TCP_SOCKET.RCV_WND] ; eax now holds the number of bytes to drop
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jbe .no_excess_data
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jle .no_excess_data
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DEBUGF 1,"%d bytes beyond right edge of window\n", eax
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;;; TODO: update stats
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cmp eax, ecx
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jb .dont_drop_all
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jl .dont_drop_all
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; If a new connection request is received while in TIME_WAIT, drop the old connection and start over,
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; if the sequence numbers are above the previous ones
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@ -552,9 +559,9 @@ TCP_input:
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jz .no_new_request
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cmp [ebx + TCP_SOCKET.t_state], TCPS_TIMED_WAIT
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jne .no_new_request
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mov edx, [ebx + TCP_SOCKET.RCV_NXT]
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cmp edx, [edx + TCP_header.SequenceNumber]
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add edx, 64000 ; TCP_ISSINCR
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; mov edx, [ebx + TCP_SOCKET.RCV_NXT]
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; cmp edx, [edx + TCP_header.SequenceNumber]
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; add edx, 64000 ; TCP_ISSINCR FIXME
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mov eax, ebx
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call TCP_close
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jmp .findpcb ; FIXME: skip code for unscaling window, ...
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@ -595,7 +602,7 @@ TCP_input:
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sub eax, ecx
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jae .no_timestamp
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mov eax, [esp + 4] ; tcp_now
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mov eax, [esp + 4+4] ; tcp_now
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mov [ebx + TCP_SOCKET.ts_recent_age], eax
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mov eax, [ebx + TCP_SOCKET.ts_val]
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mov [ebx + TCP_SOCKET.ts_recent], eax
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@ -844,7 +851,7 @@ TCP_input:
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test [ebx + TCP_SOCKET.temp_bits], TCP_BIT_TIMESTAMP
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jne .timestamp_not_present
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mov eax, [esp+4]
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mov eax, [esp+4+4]
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sub eax, [ebx + TCP_SOCKET.ts_ecr]
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inc eax
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call TCP_xmit_timer
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@ -1457,8 +1464,10 @@ align 4
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.dumpit:
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DEBUGF 1,"TCP_input: dumping\n"
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popf
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call kernel_free
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add esp, 4
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ret
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@ -1502,8 +1511,10 @@ align 4
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.drop_no_socket:
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DEBUGF 1,"TCP_input: Drop (no socket)\n"
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popf
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call kernel_free
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add esp, 4
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ret
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.drop_with_reset_no_socket:
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@ -28,6 +28,9 @@ $Revision$
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align 4
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TCP_output:
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pushf
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cli
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DEBUGF 1,"TCP_output: socket=%x\n", eax
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pusha
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@ -276,6 +279,7 @@ TCP_output:
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call mutex_unlock
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popa
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popf
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ret
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@ -567,6 +571,7 @@ TCP_send:
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DEBUGF 1,"TCP_send: success!\n"
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xor eax, eax
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popf
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ret
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@ -585,6 +590,7 @@ TCP_send:
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DEBUGF 1,"TCP_send: IP error\n"
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or eax, -1
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popf
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ret
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.send_error:
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@ -593,6 +599,7 @@ TCP_send:
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DEBUGF 1,"TCP_send: sending failed\n"
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or eax, -2
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popf
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ret
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