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@@ -37,7 +37,7 @@ TCP_BIT_FIN_IS_ACKED = 1 shl 3
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;-----------------------------------------------------------------;
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align 4
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tcp_input:
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DEBUGF 1, "tcp_input!\n"
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; record the current time
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push [timer_ticks] ; in 1/100 seconds
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push ebx ecx esi edx ; mind the order (see TCP_queue_entry struct)
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@@ -54,7 +54,6 @@ tcp_input:
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mov eax, [TCP_input_event]
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mov ebx, [eax + EVENT.id]
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xor esi, esi
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; DEBUGF 1, "Raising Event on TCP input\n"
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call raise_event
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ret
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@@ -97,7 +96,6 @@ endl
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mov eax, [TCP_input_event]
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mov ebx, [eax + EVENT.id]
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call wait_event
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DEBUGF 1, "Woke up with tcp_input_event\n"
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.loop:
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get_from_queue TCP_queue, TCP_QUEUE_SIZE, sizeof.TCP_queue_entry, .wait
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@@ -111,7 +109,7 @@ endl
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mov edi, [esi + TCP_queue_entry.ip_ptr] ; ptr to ipv4 header
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mov esi, [esi + TCP_queue_entry.segment_ptr] ; change esi last
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DEBUGF 1, "TCP_input: size=%u time=%d\n", ecx, [timer_ticks]
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: size=%u time=%d\n", ecx, [timer_ticks]
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mov edx, esi
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@@ -141,7 +139,7 @@ endl
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sub ecx, eax ; substract TCP header size from total segment size
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jb .drop_no_socket ; If total segment size is less then the advertised header size, drop packet
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DEBUGF 1, "TCP_input: %u bytes of data\n", ecx
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: %u bytes of data\n", ecx
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;-------------------------------------------
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; Convert Big-endian values to little endian
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@@ -203,7 +201,7 @@ endl
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call mutex_unlock
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popa
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DEBUGF 1, "TCP_input: socket ptr=%x state=%u flags=%x\n", ebx, [ebx + TCP_SOCKET.t_state], [edx + TCP_header.Flags]:2
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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
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;----------------------------
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; Check if socket isnt closed
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@@ -219,7 +217,7 @@ endl
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call mutex_lock
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popa
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DEBUGF 1, "TCP_input: socket locked\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: socket locked\n"
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;---------------------------
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; disable all temporary bits
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@@ -245,7 +243,7 @@ endl
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test [ebx + SOCKET.options], SO_ACCEPTCON
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jz .no_accept
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DEBUGF 1, "TCP_input: Accepting new connection\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Accepting new connection\n"
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; Unlock current socket
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@@ -302,7 +300,7 @@ endl
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cmp ecx, sizeof.TCP_header ; Does header contain any options?
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je .no_options
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DEBUGF 1, "TCP_input: Segment has options\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Segment has options\n"
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add ecx, edx
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lea esi, [edx + sizeof.TCP_header]
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@@ -325,7 +323,7 @@ endl
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; je .opt_sack
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cmp al, TCP_OPT_TIMESTAMP
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je .opt_timestamp
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DEBUGF 1, "TCP_input: unknown option:%u\n", al
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: unknown option:%u\n", al
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jmp .no_options ; If we reach here, some unknown options were received, skip them all!
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.opt_maxseg:
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@@ -339,7 +337,7 @@ endl
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xor eax, eax
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lodsw
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rol ax, 8
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DEBUGF 1, "TCP_input: Maxseg=%u\n", eax
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Maxseg=%u\n", eax
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call tcp_mss
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@@:
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jmp .opt_loop
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@@ -353,7 +351,7 @@ endl
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test [edx + TCP_header.Flags], TH_SYN
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jz @f
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DEBUGF 1, "TCP_input: Got window scale option\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Got window scale option\n"
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or [ebx + TCP_SOCKET.t_flags], TF_RCVD_SCALE
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lodsb
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@@ -372,7 +370,7 @@ endl
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test [edx + TCP_header.Flags], TH_SYN
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jz @f
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DEBUGF 1, "TCP_input: Selective Acknowledgement permitted\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Selective Acknowledgement permitted\n"
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or [ebx + TCP_SOCKET.t_flags], TF_SACK_PERMIT
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@@:
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@@ -384,7 +382,7 @@ endl
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cmp al, 10 ; length must be 10
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jne .no_options
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DEBUGF 1, "TCP_input: Got timestamp option\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Got timestamp option\n"
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test [edx + TCP_header.Flags], TH_SYN
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jz @f
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@@ -409,7 +407,7 @@ endl
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cmp eax, [ebx + TCP_SOCKET.ts_val]
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jbe .no_paws
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DEBUGF 1, "TCP_input: PAWS: detected an old segment\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: PAWS: detected an old segment\n"
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mov eax, [timestamp]
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sub eax, [ebx + TCP_SOCKET.ts_recent_age]
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@@ -499,7 +497,7 @@ endl
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sub eax, [ebx + TCP_SOCKET.SND_UNA]
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jbe .not_uni_xfer
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DEBUGF 1, "TCP_input: Header prediction: we are sender\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Header prediction: we are sender\n"
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;---------------------------------
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; Packet is a pure ACK, process it
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@@ -583,7 +581,7 @@ endl
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; Complete processing of received data
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DEBUGF 1, "TCP_input: Header prediction: we are receiving %u bytes\n", ecx
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Header prediction: we are receiving %u bytes\n", ecx
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mov esi, [dataoffset]
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add esi, edx
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@@ -592,7 +590,6 @@ endl
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add [ebx + TCP_SOCKET.RCV_NXT], ecx ; Update sequence number with number of bytes we have copied
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mov eax, ebx
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DEBUGF 1, "-- Call socket_notify for data.\n"
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call socket_notify
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or [ebx + TCP_SOCKET.t_flags], TF_DELACK ; Set delayed ack flag
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@@ -607,22 +604,22 @@ endl
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;-----------------------------------------------------------------------------------
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.not_uni_xfer:
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DEBUGF 1, "TCP_input: Header prediction failed\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Header prediction failed\n"
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; Calculate receive window size
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push edx
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mov eax, SOCKET_BUFFER_SIZE
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sub eax, [ebx + STREAM_SOCKET.rcv.size]
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DEBUGF 1, "Space in receive buffer=%d\n", eax
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DEBUGF DEBUG_NETWORK_VERBOSE, "Space in receive buffer=%d\n", eax
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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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DEBUGF 1, "Current advertised window=%d\n", edx
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DEBUGF DEBUG_NETWORK_VERBOSE, "Current advertised window=%d\n", edx
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cmp eax, edx
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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", eax
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DEBUGF DEBUG_NETWORK_VERBOSE, "Receive window size=%d\n", eax
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mov [ebx + TCP_SOCKET.RCV_WND], eax
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pop edx
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@@ -649,14 +646,14 @@ endl
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sub eax, [edx + TCP_header.SequenceNumber]
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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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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: %u bytes duplicate data!\n", eax
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; Check for duplicate SYN
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test [edx + TCP_header.Flags], TH_SYN
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jz .no_dup_syn
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DEBUGF 1, "TCP_input: got duplicate syn\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "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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@@ -703,7 +700,7 @@ endl
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;-----------------------------------------------
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; Remove duplicate data and update urgent offset
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DEBUGF 1, "TCP_input: trimming duplicate data\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: trimming duplicate data\n"
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; Trim data from left side of window
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@@ -743,7 +740,7 @@ endl
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sub eax, [ebx + TCP_SOCKET.RCV_WND] ; eax now holds the number of bytes to drop
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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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DEBUGF DEBUG_NETWORK_VERBOSE, "%d bytes beyond right edge of window\n", eax
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inc [TCPS_rcvpackafterwin]
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@@ -781,7 +778,7 @@ endl
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inc [TCPS_rcvwinprobe]
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.dont_drop_all:
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add [TCPS_rcvbyteafterwin], eax
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DEBUGF 1, "Trimming %u bytes from the right of the window\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "Trimming %u bytes from the right of the window\n"
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; remove data from the right side of window (decrease data length)
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@@ -809,7 +806,7 @@ endl
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sub eax, ecx
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jae .no_timestamp
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DEBUGF 1, "Recording timestamp\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "Recording timestamp\n"
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mov eax, [timestamp]
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mov [ebx + TCP_SOCKET.ts_recent_age], eax
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@@ -826,7 +823,7 @@ endl
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test [edx + TCP_header.Flags], TH_RST
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jz .no_rst
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DEBUGF 1, "TCP_input: Got an RST flag\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Got an RST flag\n"
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mov eax, [ebx + TCP_SOCKET.t_state]
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shl eax, 2
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@@ -848,16 +845,16 @@ endl
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;-----------------------------------------------------------------------------------
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.econnrefused:
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DEBUGF 1, "TCP_input: Connection refused\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Connection refused\n"
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mov [ebx + SOCKET.errorcode], ECONNREFUSED
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jmp .close
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;-----------------------------------------------------------------------------------
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.econnreset:
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DEBUGF 1, "TCP_input: Connection reset\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Connection reset\n"
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mov [ebx + SOCKET.errorcode], ECONNRESET
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.close:
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DEBUGF 1, "TCP_input: Closing connection\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Closing connection\n"
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mov [ebx + TCP_SOCKET.t_state], TCPS_CLOSED
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inc [TCPS_drops]
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@@ -866,7 +863,7 @@ endl
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;-----------------------------------------------------------------------------------
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.rst_close:
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DEBUGF 1, "TCP_input: Closing with reset\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Closing with reset\n"
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jmp .unlock_and_close
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;-----------------------------------------------------------------------------------
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@@ -904,7 +901,7 @@ endl
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jb .ack_processed ; states: closed, listen, syn_sent
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ja .no_syn_rcv ; established, fin_wait_1, fin_wait_2, close_wait, closing, last_ack, time_wait
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DEBUGF 1, "TCP_input: state=syn_received\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: state=syn_received\n"
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mov eax, [edx + TCP_header.AckNumber]
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cmp [ebx + TCP_SOCKET.SND_UNA], eax
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@@ -957,7 +954,7 @@ endl
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jne .reset_dupacks
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inc [TCPS_rcvdupack]
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DEBUGF 1, "TCP_input: Processing duplicate ACK\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Processing duplicate ACK\n"
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; If we have outstanding data, other than a window probe, this is a completely duplicate ACK
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; (window info didnt change) The ACK is the biggest we've seen and we've seen exactly our rexmt threshold of them,
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@@ -978,7 +975,7 @@ endl
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jb .dup_ack_complete
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ja .another_lost
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DEBUGF 1, "TCP_input: Re-transmitting lost segment\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Re-transmitting lost segment\n"
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push [ebx + TCP_SOCKET.SND_NXT] ; >>>>
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@@ -1041,7 +1038,7 @@ endl
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jmp .drop
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.another_lost:
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DEBUGF 1, "TCP_input: Increasing congestion window\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Increasing congestion window\n"
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mov eax, [ebx + TCP_SOCKET.t_maxseg]
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add [ebx + TCP_SOCKET.SND_CWND], eax
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@@ -1099,7 +1096,7 @@ endl
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sub edi, [ebx + TCP_SOCKET.SND_UNA] ; now we got the number of acked bytes in edi
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inc [TCPS_rcvackpack]
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add [TCPS_rcvackbyte], edi
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DEBUGF 1, "TCP_input: acceptable ACK for %u bytes\n", edi
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: acceptable ACK for %u bytes\n", edi
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;-----------------------------------------------------------------------------------
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;
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@@ -1208,7 +1205,7 @@ endl
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call socket_ring_free
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pop ebx edx ecx
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DEBUGF 1, "TCP_input: our FIN is acked\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: our FIN is acked\n"
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or [temp_bits], TCP_BIT_FIN_IS_ACKED
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jmp .ack_complete
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.no_fin_ack:
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@@ -1334,7 +1331,7 @@ endl
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;-----------------------------------------------------------------------------------
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.state_listen:
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DEBUGF 1, "TCP_input: state=listen\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: state=listen\n"
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test [edx + TCP_header.Flags], TH_RST
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jnz .drop
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@@ -1400,7 +1397,7 @@ endl
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;-----------------------------------------------------------------------------------
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.state_syn_sent:
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DEBUGF 1, "TCP_input: state=syn_sent\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: state=syn_sent\n"
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test [edx + TCP_header.Flags], TH_ACK
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jz @f
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@@ -1460,7 +1457,7 @@ endl
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test [edx + TCP_header.Flags], TH_ACK
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jz .simultaneous_open
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DEBUGF 1, "TCP_input: active open\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: active open\n"
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inc [TCPS_connects]
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@@ -1501,7 +1498,7 @@ endl
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;-----------------------------------------------------------------------------------
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.simultaneous_open:
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DEBUGF 1, "TCP_input: simultaneous open\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: simultaneous open\n"
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mov [ebx + TCP_SOCKET.t_state], TCPS_SYN_RECEIVED
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;-----------------------------------------------------------------------------------
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@@ -1521,7 +1518,7 @@ endl
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cmp ecx, [ebx + TCP_SOCKET.RCV_WND]
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jbe .dont_trim
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DEBUGF 1, "TCP_input: received data does not fit in window, trimming %u bytes\n", eax
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: received data does not fit in window, trimming %u bytes\n", eax
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inc [TCPS_rcvpackafterwin]
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sub ecx, [ebx + TCP_SOCKET.RCV_WND]
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add [TCPS_rcvbyteafterwin], ecx
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@@ -1542,7 +1539,7 @@ endl
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;-----------------------------------------------------------------------------------
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.ack_processed:
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DEBUGF 1, "TCP_input: ACK processed\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: ACK processed\n"
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; dont look at window if no ACK
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@@ -1594,7 +1591,7 @@ endl
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mov [ebx + TCP_SOCKET.max_sndwnd], eax
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@@:
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DEBUGF 1, "TCP_input: Updating window to %u\n", eax
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Updating window to %u\n", eax
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push [edx + TCP_header.SequenceNumber]
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pop [ebx + TCP_SOCKET.SND_WL1]
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@@ -1690,7 +1687,7 @@ endl
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jmp .data_done
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.out_of_order:
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DEBUGF 1, "TCP data is out of order!\nSequencenumber is %u, we expected %u.\n", \
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP data is out of order!\nSequencenumber is %u, we expected %u.\n", \
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[edx + TCP_header.SequenceNumber], [ebx + TCP_SOCKET.RCV_NXT]
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; Uh-oh, some data is out of order, lets call TCP reassemble for help
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@@ -1712,12 +1709,12 @@ endl
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test [edx + TCP_header.Flags], TH_FIN
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jz .final_processing
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DEBUGF 1, "TCP_input: Processing FIN\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Processing FIN\n"
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cmp [ebx + TCP_SOCKET.t_state], TCPS_TIME_WAIT
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jae .not_first_fin
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DEBUGF 1, "TCP_input: First FIN for this connection\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: First FIN for this connection\n"
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mov eax, ebx
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call socket_cant_recv_more
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@@ -1778,7 +1775,7 @@ endl
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;-----------------------------------------------------------------------------------
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.final_processing:
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DEBUGF 1, "TCP_input: Final processing\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Final processing\n"
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push ebx
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lea ecx, [ebx + SOCKET.mutex]
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@@ -1790,14 +1787,14 @@ endl
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test [eax + TCP_SOCKET.t_flags], TF_ACKNOW
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jz .done
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DEBUGF 1, "TCP_input: ACK now!\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: ACK now!\n"
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.need_output:
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DEBUGF 1, "TCP_input: need output\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: need output\n"
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call tcp_output
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.done:
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DEBUGF 1, "TCP_input: dumping\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: dumping\n"
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call net_buff_free
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jmp .loop
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@@ -1810,7 +1807,7 @@ endl
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;-----------------------------------------------------------------------------------
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.drop_after_ack:
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DEBUGF 1, "TCP_input: Drop after ACK\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Drop after ACK\n"
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push edx ebx
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lea ecx, [ebx + SOCKET.mutex]
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@@ -1825,7 +1822,7 @@ endl
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;-----------------------------------------------------------------------------------
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.drop_with_reset:
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DEBUGF 1, "TCP_input: Drop with reset\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Drop with reset\n"
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push ebx edx
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lea ecx, [ebx + SOCKET.mutex]
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@@ -1897,7 +1894,7 @@ endl
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; Unlock socket mutex and prepare to drop segment
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.drop:
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DEBUGF 1, "TCP_input: Dropping segment\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Dropping segment\n"
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pusha
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lea ecx, [ebx + SOCKET.mutex]
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@@ -1918,7 +1915,7 @@ endl
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; Drop the segment
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.drop_no_socket:
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DEBUGF 1, "TCP_input: Drop (no socket)\n"
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DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_input: Drop (no socket)\n"
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call net_buff_free
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jmp .loop
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