forked from KolibriOS/kolibrios
* Updates in TCP code
* Splitted TCP code into multiple files * cleanup git-svn-id: svn://kolibrios.org@1733 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr
parent
e0fed2fb2e
commit
1dd8c78cbd
@ -205,11 +205,6 @@ ETH_API:
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movzx eax, bh
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shl eax, 2
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cmp bl, 7
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jz .out_queue
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cmp bl, 6
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jz .in_queue
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mov eax, dword [NET_DRV_LIST + eax]
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cmp [eax + NET_DEVICE.type], NET_TYPE_ETH
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jne .error
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@ -266,20 +261,3 @@ ETH_API:
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call [eax + ETH_DEVICE.set_MAC]
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ret
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.in_queue:
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if ETH_QUEUE
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add eax, ETH_IN_QUEUE
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mov eax, [eax + queue.size]
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else
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or eax, -1
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end if
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ret
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.out_queue:
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if ETH_QUEUE
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add eax, ETH_OUT_QUEUE
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mov eax, [eax + queue.size]
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else
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or eax, -1
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end if
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ret
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@ -484,7 +484,7 @@ align 4
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push eax
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init_queue (eax + SOCKET_QUEUE_LOCATION) ; Set up data receiving queue
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pop eax
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pop eax
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mov [eax + SOCKET.lock], 0
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mov dword [esp+32], 0
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@ -508,19 +508,15 @@ align 4
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mov [eax + TCP_SOCKET.timer_persist], 0
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mov [eax + TCP_SOCKET.t_state], TCB_SYN_SENT
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mov ebx, [TCP_sequence_num]
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push [TCP_sequence_num]
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add [TCP_sequence_num], 6400
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mov [eax + TCP_SOCKET.ISS], ebx
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pop [eax + TCP_SOCKET.ISS]
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mov [eax + TCP_SOCKET.timer_keepalive], TCP_time_keep_init
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TCP_sendseqinit eax
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; mov [ebx + TCP_SOCKET.timer_retransmission], ;; todo: create macro to set retransmission timer
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push eax
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call TCP_output
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pop eax
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mov ebx, eax
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lea eax, [ebx + STREAM_SOCKET.snd]
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@ -530,6 +526,10 @@ align 4
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call SOCKET_ring_create
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mov [ebx + SOCKET.lock], 0
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mov eax, ebx
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call TCP_output
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mov dword [esp+32], 0
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ret
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@ -20,7 +20,8 @@
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$Revision$
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__DEBUG_LEVEL_OLD__ equ __DEBUG_LEVEL__
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__DEBUG_LEVEL__ equ 1 ; this sets the debug level for network part of kernel
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__DEBUG_LEVEL__ equ 1 ; this sets the debug level for network part of kernel
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uglobal
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net_10ms dd ?
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@ -29,14 +30,12 @@ endg
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MAX_NET_DEVICES equ 16
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ETH_QUEUE equ 0 ; 1 = enable / 0 = disable
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MIN_EPHEMERAL_PORT equ 49152
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MAX_EPHEMERAL_PORT equ 61000
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; Ethernet protocol numbers
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ETHER_ARP equ 0x0608
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ETHER_IPv4 equ 0x0008 ; Reversed from 0800 for intel
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ETHER_IPv4 equ 0x0008
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ETHER_PPP_DISCOVERY equ 0x6388
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ETHER_PPP_SESSION equ 0x6488
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@ -52,7 +51,6 @@ AF_INET4 equ 2
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;AF_AAL5 equ 8
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;AF_X25 equ 9
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AF_INET6 equ 10
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;AF_MAX equ 12
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; Internet protocol numbers
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IP_PROTO_IP equ 0
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File diff suppressed because it is too large
Load Diff
1371
kernel/branches/net/network/tcp_input.inc
Normal file
1371
kernel/branches/net/network/tcp_input.inc
Normal file
File diff suppressed because it is too large
Load Diff
409
kernel/branches/net/network/tcp_output.inc
Normal file
409
kernel/branches/net/network/tcp_output.inc
Normal file
@ -0,0 +1,409 @@
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;-----------------------------------------------------------------
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;
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; TCP_output
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;
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; IN: eax = socket pointer
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;
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; OUT: /
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;
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;-----------------------------------------------------------------
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align 4
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TCP_output:
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DEBUGF 1,"TCP_output, socket: %x\n", eax
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; We'll detect the length of the data to be transmitted, and flags to be used
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; If there is some data, or any critical controls to send (SYN / RST), then transmit
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; Otherwise, investigate further
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mov ebx, [eax + TCP_SOCKET.SND_MAX]
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cmp ebx, [eax + TCP_SOCKET.SND_UNA]
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jne .not_idle
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mov ebx, [eax + TCP_SOCKET.t_idle]
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cmp ebx, [eax + TCP_SOCKET.t_rxtcur]
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jle .not_idle
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; We have been idle for a while and no ACKS are expected to clock out any data we send..
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; Slow start to get ack "clock" running again.
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mov ebx, [eax + TCP_SOCKET.t_maxseg]
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mov [eax + TCP_SOCKET.SND_CWND], ebx
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.not_idle:
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.again:
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mov ebx, [eax + TCP_SOCKET.SND_NXT] ; calculate offset
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sub ebx, [eax + TCP_SOCKET.SND_UNA] ;
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mov ecx, [eax + TCP_SOCKET.SND_WND] ; determine window
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cmp ecx, [eax + TCP_SOCKET.SND_CWND] ;
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jl @f ;
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mov ecx, [eax + TCP_SOCKET.SND_CWND] ;
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@@: ;
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call TCP_outflags ; in dl
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; If in persist timeout with window of 0, send 1 byte.
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; Otherwise, if window is small but nonzero, and timer expired,
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; we will send what we can and go to transmit state
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test [eax + TCP_SOCKET.t_force], -1
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jz .no_persist_timeout
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test ecx, ecx
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jnz .no_zero_window
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cmp ebx, [eax + STREAM_SOCKET.snd + RING_BUFFER.size]
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jge @f
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and dl, not (TH_FIN) ; clear the FIN flag ??? how can it be set before?
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@@:
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inc ecx
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jmp .no_persist_timeout
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.no_zero_window:
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mov [eax + TCP_SOCKET.timer_persist], 0
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mov [eax + TCP_SOCKET.t_rxtshift], 0
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.no_persist_timeout:
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;;;106
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mov esi, [eax + STREAM_SOCKET.snd + RING_BUFFER.size]
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cmp esi, ecx
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jl @f
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mov esi, ecx
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@@:
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sub esi, ebx
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cmp esi, -1
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jne .not_minus_one
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; If FIN has been set, but not ACKed, and we havent been called to retransmit,
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; len (esi) will be -1
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; Otherwise, window shrank after we sent into it.
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; If window shrank to 0, cancel pending retransmit and pull SND_NXT back to (closed) window
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; We will enter persist state below.
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; If window didn't close completely, just wait for an ACK
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xor esi, esi
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test ecx, ecx
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jnz @f
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mov [eax + TCP_SOCKET.timer_retransmission], 0 ; cancel retransmit
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push [eax + TCP_SOCKET.SND_UNA]
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pop [eax + TCP_SOCKET.SND_NXT]
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@@:
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.not_minus_one:
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;;; 124
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cmp esi, [eax + TCP_SOCKET.t_maxseg]
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jle @f
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mov esi, [eax + TCP_SOCKET.t_maxseg]
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;sendalot = 1
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@@:
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;;; 128
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mov edi, [eax + TCP_SOCKET.SND_NXT]
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add edi, esi ; len
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sub edi, [eax + TCP_SOCKET.SND_UNA]
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add edi, [eax + STREAM_SOCKET.snd + RING_BUFFER.size]
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cmp edi, 0
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jle @f
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and dl, not (TH_FIN) ; clear the FIN flag
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@@:
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; set ecx to space available in receive buffer
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; From now on, ecx will be the window we advertise to the other end
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mov ecx, SOCKET_MAXDATA
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sub ecx, [eax + STREAM_SOCKET.rcv + RING_BUFFER.size]
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;------------------------------
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; Sender silly window avoidance
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cmp ecx, [eax + TCP_SOCKET.t_maxseg]
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je .send
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;;; TODO: 144-145
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test [eax + TCP_SOCKET.t_force], -1
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jnz .send
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mov ebx, [eax + TCP_SOCKET.max_sndwnd]
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shr ebx, 1
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cmp ecx, ebx
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jge .send
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mov ebx, [eax + TCP_SOCKET.SND_NXT]
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cmp ebx, [eax + TCP_SOCKET.SND_MAX]
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jl .send
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;----------------------------------------
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; Check if a window update should be sent
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test ecx, ecx ; window
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jz .no_window
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;;; TODO 154-172
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.no_window:
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;--------------------------
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; Should a segment be sent?
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test [eax + TCP_SOCKET.t_flags], TF_ACKNOW
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jnz .send
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test dl, TH_SYN + TH_RST
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jnz .send
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mov ebx, [eax + TCP_SOCKET.SND_UP]
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cmp ebx, [eax + TCP_SOCKET.SND_UNA]
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jg .send
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test dl, TH_FIN
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jz .enter_persist
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test [eax + TCP_SOCKET.t_flags], TF_SENTFIN
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jnz .send
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mov ebx, [eax + TCP_SOCKET.SND_NXT]
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cmp ebx, [eax + TCP_SOCKET.SND_UNA]
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je .send
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;--------------------
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; Enter persist state
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.enter_persist:
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DEBUGF 1,"Entering persist state\n"
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;--------------------------------------
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; No reason to send a segment, just ret
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DEBUGF 1,"No reason to send a segment\n"
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mov [ebx + SOCKET.lock], 0
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ret
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;-----------------------------------------------
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;
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; Send a segment
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;
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; eax = socket pointer
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; dl = flags
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;
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;-----------------------------------------------
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.send:
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DEBUGF 1,"Preparing to send a segment\n"
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mov edi, TCP_segment.Data ; edi will contain headersize
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sub esp, 8 ; create some space on stack
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push eax ; save this too..
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;------------------------------------
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; Send options with first SYN segment
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test dl, TH_SYN
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jz .no_options
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push [eax + TCP_SOCKET.ISS]
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pop [eax + TCP_SOCKET.SND_NXT]
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test [eax + TCP_SOCKET.t_flags], TF_NOOPT
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jnz .no_options
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mov ecx, 1460
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or ecx, TCP_OPT_MAXSEG shl 24 + 4 shl 16
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bswap ecx
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push ecx
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add di, 4
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test [eax + TCP_SOCKET.t_flags], TF_REQ_SCALE
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jz .no_syn
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test dl, TH_ACK
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jnz .scale_opt
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test [eax + TCP_SOCKET.t_flags], TF_RCVD_SCALE
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jz .no_syn
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.scale_opt:
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movzx ecx, byte [eax + TCP_SOCKET.request_r_scale]
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or ecx, TCP_OPT_WINDOW shl 24 + 4 shl 16 + TCP_OPT_NOP shl 8
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bswap ecx
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pushd ecx
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add di, 4
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.no_syn:
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;------------------------------------
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; Make the timestamp option if needed
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test [eax + TCP_SOCKET.t_flags], TF_REQ_TSTMP
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jz .no_timestamp
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test dl, TH_RST
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jnz .no_timestamp
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test dl, TH_ACK
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jz .timestamp
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test [eax + TCP_SOCKET.t_flags], TF_RCVD_TSTMP
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jz .no_timestamp
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.timestamp:
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mov esi, [timer_ticks]
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bswap esi
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push esi
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pushw 0
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pushd TCP_OPT_TIMESTAMP + 10 shl 8 + TCP_OPT_NOP shl 16 + TCP_OPT_NOP shl 24
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add di, 10
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.no_timestamp:
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;; TODO: check if we dont exceed the max segment size
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.no_options:
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; eax = socket ptr
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; edx = flags
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; ecx = data size
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; edi = header size
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; esi = snd ring buff ptr
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mov ecx, [eax + STREAM_SOCKET.snd + RING_BUFFER.size]
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cmp ecx, [eax + TCP_SOCKET.t_maxseg] ;;; right?
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jle @f
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mov ecx, [eax + TCP_SOCKET.t_maxseg]
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@@:
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add ecx, edi ; total TCP segment size
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; Start by pushing all TCP header values in reverse order on stack
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; (essentially, creating the tcp header!)
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pushw 0 ; .UrgentPointer dw ?
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pushw 0 ; .Checksum dw ?
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pushw 0x00a0 ; .Window dw ? ;;;;;;;
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shl edi, 2 ; .DataOffset db ? only 4 left-most bits
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shl dx, 8
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or dx, di ; .Flags db ?
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pushw dx
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shr edi, 2 ; .DataOffset db ? ;;;;
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push [eax + TCP_SOCKET.RCV_NXT] ; .AckNumber dd ?
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ntohd [esp]
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push [eax + TCP_SOCKET.SND_NXT] ; .SequenceNumber dd ?
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ntohd [esp]
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push [eax + TCP_SOCKET.RemotePort] ; .DestinationPort dw ?
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ntohw [esp]
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push [eax + TCP_SOCKET.LocalPort] ; .SourcePort dw ?
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ntohw [esp]
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push edi ; header size
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; Create the IP packet
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mov ebx, [eax + IP_SOCKET.LocalIP] ; source ip
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mov eax, [eax + IP_SOCKET.RemoteIP] ; dest ip
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mov di, IP_PROTO_TCP shl 8 + 128
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call IPv4_output
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jz .fail
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;-----------------------------------------
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; Move TCP header from stack to TCP packet
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push ecx
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mov ecx, [esp+4]
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lea esi, [esp+4+4]
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shr ecx, 2
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rep movsd
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pop ecx ; full TCP packet size
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pop esi ; headersize
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add esp, esi
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mov [esp + 4], eax ; packet ptr
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mov [esp + 4+4], edx ; packet size
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mov edx, edi ; begin of data
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sub edx, esi ; begin of packet (edi = begin of data)
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push ecx
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sub ecx, esi ; data size
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;--------------
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; Copy the data
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; eax = ptr to ring struct
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; ecx = buffer size
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; edi = ptr to buffer
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; test ecx, ecx
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mov eax, [esp+4] ; socket ptr
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add [eax + TCP_SOCKET.SND_NXT], ecx
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add eax, STREAM_SOCKET.snd
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push edx
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call SOCKET_ring_read
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pop esi
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pop ecx
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pop eax
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test [esi + TCP_segment.Flags], TH_SYN + TH_FIN
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jz @f
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inc [eax + TCP_SOCKET.SND_NXT]
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;;; TODO: update sentfin flag
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@@:
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mov edx, [eax + TCP_SOCKET.SND_NXT]
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cmp edx, [eax + TCP_SOCKET.SND_MAX]
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jle @f
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mov [eax + TCP_SOCKET.SND_MAX], edx
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;;;; TODO: time transmission (420)
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@@:
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;;; TODO: set retransmission timer
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;--------------------
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; Create the checksum
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DEBUGF 1,"checksum: ptr=%x size=%u\n", esi, ecx
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TCP_checksum (eax + IP_SOCKET.LocalIP), (eax + IP_SOCKET.RemoteIP)
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mov [esi+TCP_segment.Checksum], dx
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;----------------
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; Send the packet
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DEBUGF 1,"Sending TCP Packet to device %x\n", ebx
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call [ebx + NET_DEVICE.transmit]
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ret
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.fail:
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pop ecx
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add esp, ecx
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add esp, 4+8
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DEBUGF 1,"TCP_output: failed\n"
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ret
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365
kernel/branches/net/network/tcp_subr.inc
Normal file
365
kernel/branches/net/network/tcp_subr.inc
Normal file
@ -0,0 +1,365 @@
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||||
|
||||
|
||||
|
||||
macro TCP_checksum IP1, IP2 {
|
||||
|
||||
;-------------
|
||||
; Pseudoheader
|
||||
|
||||
; protocol type
|
||||
mov edx, IP_PROTO_TCP
|
||||
|
||||
; source address
|
||||
add dl, byte [IP1+1]
|
||||
adc dh, byte [IP1+0]
|
||||
adc dl, byte [IP1+3]
|
||||
adc dh, byte [IP1+2]
|
||||
|
||||
; destination address
|
||||
adc dl, byte [IP2+1]
|
||||
adc dh, byte [IP2+0]
|
||||
adc dl, byte [IP2+3]
|
||||
adc dh, byte [IP2+2]
|
||||
|
||||
; size
|
||||
adc dl, cl
|
||||
adc dh, ch
|
||||
|
||||
;---------------------
|
||||
; Real header and data
|
||||
|
||||
push esi
|
||||
call checksum_1
|
||||
call checksum_2
|
||||
pop esi
|
||||
|
||||
} ; returns in dx only
|
||||
|
||||
|
||||
|
||||
|
||||
macro TCP_sendseqinit ptr {
|
||||
|
||||
push edi ;;;; i dont like this static use of edi
|
||||
mov edi, [ptr + TCP_SOCKET.ISS]
|
||||
mov [ptr + TCP_SOCKET.SND_UP], edi
|
||||
mov [ptr + TCP_SOCKET.SND_MAX], edi
|
||||
mov [ptr + TCP_SOCKET.SND_NXT], edi
|
||||
mov [ptr + TCP_SOCKET.SND_UNA], edi
|
||||
pop edi
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
macro TCP_rcvseqinit ptr {
|
||||
|
||||
push edi
|
||||
mov edi, [ptr + TCP_SOCKET.IRS]
|
||||
inc edi
|
||||
mov [ptr + TCP_SOCKET.RCV_NXT], edi
|
||||
mov [ptr + TCP_SOCKET.RCV_ADV], edi
|
||||
pop edi
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
;---------------------------
|
||||
;
|
||||
; TCP_pull_out_of_band
|
||||
;
|
||||
; IN: eax =
|
||||
; ebx = socket ptr
|
||||
; edx = tcp packet ptr
|
||||
;
|
||||
; OUT: /
|
||||
;
|
||||
;---------------------------
|
||||
|
||||
align 4
|
||||
TCP_pull_out_of_band:
|
||||
|
||||
DEBUGF 1,"TCP_pull_out_of_band\n"
|
||||
|
||||
;;;; 1282-1305
|
||||
|
||||
ret
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
;-------------------------
|
||||
;
|
||||
; TCP_drop
|
||||
;
|
||||
; IN: eax = socket ptr
|
||||
; ebx = error number
|
||||
;
|
||||
; OUT: eax = socket ptr
|
||||
;
|
||||
;-------------------------
|
||||
align 4
|
||||
TCP_drop:
|
||||
|
||||
DEBUGF 1,"TCP_drop\n"
|
||||
|
||||
cmp [eax + TCP_SOCKET.t_state], TCB_SYN_RECEIVED
|
||||
jl .no_syn_received
|
||||
|
||||
mov [eax + TCP_SOCKET.t_state], TCB_CLOSED
|
||||
|
||||
call TCP_output
|
||||
|
||||
;;; TODO: update stats
|
||||
|
||||
jmp TCP_close
|
||||
|
||||
.no_syn_received:
|
||||
|
||||
;;; TODO: update stats
|
||||
|
||||
;;; TODO: check if error code is "Connection timed out' and handle accordingly
|
||||
|
||||
mov [eax + SOCKET.errorcode], ebx
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
;-------------------------
|
||||
;
|
||||
; TCP_close
|
||||
;
|
||||
; IN: eax = socket ptr
|
||||
; OUT: eax = socket ptr
|
||||
;
|
||||
;-------------------------
|
||||
align 4
|
||||
TCP_close:
|
||||
|
||||
DEBUGF 1,"TCP_close\n"
|
||||
|
||||
;;; TODO: update RTT and mean deviation
|
||||
;;; TODO: update slow start threshold
|
||||
;;; TODO: release connection resources
|
||||
|
||||
; Now, mark the socket as being disconnected
|
||||
|
||||
mov [eax + SOCKET.state], 0 ;;; FIXME
|
||||
|
||||
ret
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
;-------------------------
|
||||
;
|
||||
; TCP_outflags
|
||||
;
|
||||
; IN: eax = socket ptr
|
||||
;
|
||||
; OUT: edx = flags
|
||||
;
|
||||
;-------------------------
|
||||
align 4
|
||||
TCP_outflags:
|
||||
|
||||
mov edx, [eax + TCP_SOCKET.t_state]
|
||||
movzx edx, byte [edx + .flaglist]
|
||||
|
||||
DEBUGF 1,"TCP_outflags, socket: %x, flags: %x\n", eax, dl
|
||||
|
||||
ret
|
||||
|
||||
.flaglist:
|
||||
|
||||
db TH_RST + TH_ACK ; TCB_CLOSED
|
||||
db 0 ; TCB_LISTEN
|
||||
db TH_SYN ; TCB_SYN_SENT
|
||||
db TH_SYN + TH_ACK ; TCB_SYN_RECEIVED
|
||||
db TH_ACK ; TCB_ESTABLISHED
|
||||
db TH_ACK ; TCB_CLOSE_WAIT
|
||||
db TH_SYN + TH_ACK ; TCB_FIN_WAIT_1
|
||||
db TH_SYN + TH_ACK ; TCB_CLOSING
|
||||
db TH_SYN + TH_ACK ; TCB_LAST_ACK
|
||||
db TH_ACK ; TCB_FIN_WAIT_2
|
||||
db TH_ACK ; TCB_TIMED_WAIT
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
;---------------------------------------
|
||||
;
|
||||
; The easy way to send an ACK/RST/keepalive segment
|
||||
;
|
||||
; TCP_respond_socket:
|
||||
;
|
||||
; IN: ebx = socket ptr
|
||||
; cl = flags
|
||||
;
|
||||
;--------------------------------------
|
||||
align 4
|
||||
TCP_respond_socket:
|
||||
|
||||
DEBUGF 1,"TCP_respond_socket\n"
|
||||
|
||||
;---------------------
|
||||
; Create the IP packet
|
||||
|
||||
push cx ebx
|
||||
mov eax, [ebx + IP_SOCKET.RemoteIP]
|
||||
mov ebx, [ebx + IP_SOCKET.LocalIP]
|
||||
mov ecx, TCP_segment.Data
|
||||
mov di , IP_PROTO_TCP shl 8 + 128
|
||||
call IPv4_output
|
||||
test edi, edi
|
||||
jz .error
|
||||
pop esi cx
|
||||
push edx eax
|
||||
|
||||
;-----------------------------------------------
|
||||
; Fill in the TCP header by using the socket ptr
|
||||
|
||||
mov ax, [esi + TCP_SOCKET.LocalPort]
|
||||
rol ax, 8
|
||||
stosw
|
||||
mov ax, [esi + TCP_SOCKET.RemotePort]
|
||||
rol ax, 8
|
||||
stosw
|
||||
mov eax, [esi + TCP_SOCKET.SND_NXT]
|
||||
bswap eax
|
||||
stosd
|
||||
mov eax, [esi + TCP_SOCKET.RCV_NXT]
|
||||
bswap eax
|
||||
stosd
|
||||
mov al, 0x50 ; Dataoffset: 20 bytes
|
||||
stosb
|
||||
mov al, cl
|
||||
stosb
|
||||
mov ax, [esi + TCP_SOCKET.RCV_WND]
|
||||
rol ax, 8
|
||||
stosw ; window
|
||||
xor eax, eax
|
||||
stosd ; checksum + urgentpointer
|
||||
|
||||
;---------------------
|
||||
; Fill in the checksum
|
||||
|
||||
.checksum:
|
||||
sub edi, TCP_segment.Data
|
||||
mov ecx, TCP_segment.Data
|
||||
xchg esi, edi
|
||||
TCP_checksum (edi + IP_SOCKET.LocalIP), (esi + IP_SOCKET.RemoteIP)
|
||||
mov [esi+TCP_segment.Checksum], dx
|
||||
|
||||
;--------------------
|
||||
; And send the segment
|
||||
|
||||
call [ebx + NET_DEVICE.transmit]
|
||||
ret
|
||||
|
||||
.error:
|
||||
DEBUGF 1,"TCP_respond failed\n"
|
||||
add esp, 2+4
|
||||
|
||||
ret
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
;-------------------------
|
||||
; TCP_respond.segment:
|
||||
;
|
||||
; IN: edx = segment ptr (a previously received segment)
|
||||
; cl = flags
|
||||
|
||||
align 4
|
||||
TCP_respond_segment:
|
||||
|
||||
DEBUGF 1,"TCP_respond_segment\n"
|
||||
|
||||
;---------------------
|
||||
; Create the IP packet
|
||||
|
||||
push cx edx
|
||||
mov ebx, [edx - 20 + IPv4_Packet.SourceAddress] ;;;; and what if ip packet had options?!
|
||||
mov eax, [edx - 20 + IPv4_Packet.DestinationAddress] ;;;
|
||||
mov ecx, TCP_segment.Data
|
||||
mov di , IP_PROTO_TCP shl 8 + 128
|
||||
call IPv4_output
|
||||
jz .error
|
||||
pop esi cx
|
||||
|
||||
push edx eax
|
||||
|
||||
;---------------------------------------------------
|
||||
; Fill in the TCP header by using a received segment
|
||||
|
||||
mov ax, [esi + TCP_segment.DestinationPort]
|
||||
rol ax, 8
|
||||
stosw
|
||||
mov ax, [esi + TCP_segment.SourcePort]
|
||||
rol ax, 8
|
||||
stosw
|
||||
mov eax, [esi + TCP_segment.AckNumber]
|
||||
bswap eax
|
||||
stosd
|
||||
xor eax, eax
|
||||
stosd
|
||||
mov al, 0x50 ; Dataoffset: 20 bytes
|
||||
stosb
|
||||
mov al, cl
|
||||
stosb
|
||||
mov ax, 1280
|
||||
rol ax, 8
|
||||
stosw ; window
|
||||
xor eax, eax
|
||||
stosd ; checksum + urgentpointer
|
||||
|
||||
;---------------------
|
||||
; Fill in the checksum
|
||||
|
||||
.checksum:
|
||||
lea esi, [edi - TCP_segment.Data]
|
||||
mov ecx, TCP_segment.Data
|
||||
TCP_checksum (esi - 20 + IPv4_Packet.DestinationAddress), (esi - 20 + IPv4_Packet.DestinationAddress)
|
||||
mov [esi+TCP_segment.Checksum], dx
|
||||
|
||||
;--------------------
|
||||
; And send the segment
|
||||
|
||||
call [ebx + NET_DEVICE.transmit]
|
||||
ret
|
||||
|
||||
.error:
|
||||
DEBUGF 1,"TCP_respond failed\n"
|
||||
add esp, 2+4
|
||||
|
||||
ret
|
||||
108
kernel/branches/net/network/tcp_timer.inc
Normal file
108
kernel/branches/net/network/tcp_timer.inc
Normal file
@ -0,0 +1,108 @@
|
||||
|
||||
;----------------------
|
||||
; 160 ms timer
|
||||
;----------------------
|
||||
macro TCP_timer_160ms {
|
||||
|
||||
local .loop
|
||||
local .exit
|
||||
|
||||
mov eax, net_sockets
|
||||
.loop:
|
||||
mov eax, [eax + SOCKET.NextPtr]
|
||||
or eax, eax
|
||||
jz .exit
|
||||
|
||||
cmp [eax + SOCKET.Protocol], IP_PROTO_TCP ;;; We should also check if family is AF_INET
|
||||
jne .loop
|
||||
|
||||
dec [eax + TCP_SOCKET.timer_ack]
|
||||
jnz .loop
|
||||
|
||||
DEBUGF 1,"TCP ack for socket %x expired, time to piggyback!\n", eax
|
||||
|
||||
push eax
|
||||
call TCP_respond_socket
|
||||
pop eax
|
||||
|
||||
jmp .loop
|
||||
|
||||
.exit:
|
||||
|
||||
}
|
||||
|
||||
|
||||
;----------------------
|
||||
; 640 ms timer
|
||||
;----------------------
|
||||
macro TCP_timer_640ms {
|
||||
|
||||
local .loop
|
||||
local .exit
|
||||
|
||||
; Update TCP sequence number
|
||||
|
||||
add [TCP_sequence_num], 64000
|
||||
|
||||
; scan through all the active TCP sockets, decrementing ALL timers
|
||||
; timers do not have the chance to wrap because the keepalive timer will kill the socket when it expires
|
||||
|
||||
mov eax, net_sockets
|
||||
.loop:
|
||||
mov eax, [eax + SOCKET.NextPtr]
|
||||
.check_only:
|
||||
or eax, eax
|
||||
jz .exit
|
||||
|
||||
cmp [eax + SOCKET.Domain], AF_INET4
|
||||
jne .loop
|
||||
|
||||
cmp [eax + SOCKET.Protocol], IP_PROTO_TCP
|
||||
jne .loop
|
||||
|
||||
|
||||
;---------------
|
||||
|
||||
cmp [eax + SOCKET.lock], 0
|
||||
jz @f
|
||||
|
||||
DEBUGF 1,"\nlocked\n"
|
||||
@@:
|
||||
|
||||
;-----------
|
||||
|
||||
inc [eax + TCP_SOCKET.t_idle]
|
||||
dec [eax + TCP_SOCKET.timer_retransmission]
|
||||
jnz .check_more2
|
||||
|
||||
DEBUGF 1,"socket %x: Retransmission timer expired\n", eax
|
||||
|
||||
push eax
|
||||
call TCP_output
|
||||
pop eax
|
||||
|
||||
.check_more2:
|
||||
dec [eax + TCP_SOCKET.timer_keepalive]
|
||||
jnz .check_more3
|
||||
|
||||
DEBUGF 1,"socket %x: Keepalive expired\n", eax
|
||||
|
||||
call TCP_close
|
||||
jmp .loop
|
||||
|
||||
.check_more3:
|
||||
dec [eax + TCP_SOCKET.timer_timed_wait]
|
||||
jnz .check_more5
|
||||
|
||||
DEBUGF 1,"socket %x: 2MSL timer expired\n", eax
|
||||
|
||||
.check_more5:
|
||||
dec [eax + TCP_SOCKET.timer_persist]
|
||||
jnz .loop
|
||||
|
||||
DEBUGF 1,"socket %x: persist timer expired\n", eax
|
||||
|
||||
jmp .loop
|
||||
.exit:
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user