mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-11-25 02:09:36 +03:00
* one check moved so that early received FIN packet does not eat tail of data
* changes in state of TCP socket now notify socket's owner git-svn-id: svn://kolibrios.org@1181 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
CleverMouse
parent
456168f5b2
commit
a864f1a57e
@ -692,6 +692,36 @@ proc tcpStateMachine stdcall, sockAddr:DWORD
|
||||
ret
|
||||
endp
|
||||
|
||||
;***************************************************************************
|
||||
; Function
|
||||
; signal_network_event
|
||||
;
|
||||
; Description
|
||||
; Signals about network event to socket owner
|
||||
; This is a kernel function, called from TCP handler
|
||||
;
|
||||
; Socket/TCB address in ebx
|
||||
;***************************************************************************
|
||||
proc signal_network_event
|
||||
push ecx esi eax
|
||||
mov eax, [ebx + SOCKET.PID]
|
||||
mov ecx, 1
|
||||
mov esi, TASK_DATA + TASKDATA.pid
|
||||
|
||||
.next_pid:
|
||||
cmp [esi], eax
|
||||
je .found_pid
|
||||
inc ecx
|
||||
add esi, 0x20
|
||||
cmp ecx, [TASK_COUNT]
|
||||
jbe .next_pid
|
||||
|
||||
.found_pid:
|
||||
shl ecx, 8
|
||||
or [ecx + SLOT_BASE + APPDATA.event_mask], EVENT_NETWORK ; stack event
|
||||
pop eax esi ecx
|
||||
ret
|
||||
endp
|
||||
|
||||
proc stateTCB_LISTEN stdcall, sockAddr:DWORD
|
||||
; In this case, we are expecting a SYN packet
|
||||
@ -723,6 +753,7 @@ proc stateTCB_LISTEN stdcall, sockAddr:DWORD
|
||||
cmp ax, NO_BUFFER
|
||||
je .exit
|
||||
|
||||
push ebx
|
||||
push eax
|
||||
mov bl, TH_SYN + TH_ACK
|
||||
xor ecx, ecx
|
||||
@ -741,8 +772,10 @@ proc stateTCB_LISTEN stdcall, sockAddr:DWORD
|
||||
pop ebx
|
||||
call queue
|
||||
|
||||
pop ebx
|
||||
mov esi, [sockAddr]
|
||||
mov [esi + SOCKET.TCBState], TCB_SYN_RECEIVED
|
||||
call signal_network_event
|
||||
|
||||
; increment SND.NXT in socket
|
||||
add esi, SOCKET.SND_NXT
|
||||
@ -774,6 +807,7 @@ proc stateTCB_SYN_SENT stdcall, sockAddr:DWORD
|
||||
push TH_ACK
|
||||
|
||||
.send:
|
||||
call signal_network_event
|
||||
; Store the recv.nxt field
|
||||
mov eax, [edx + 20 + TCP_PACKET.SequenceNumber]
|
||||
|
||||
@ -825,7 +859,7 @@ proc stateTCB_SYN_RECEIVED stdcall, sockAddr:DWORD
|
||||
pop [ebx + SOCKET.RemoteIP] [ebx + SOCKET.RemotePort]
|
||||
|
||||
mov [ebx + SOCKET.TCBState], TCB_LISTEN
|
||||
jmp .exit
|
||||
jmp .signal
|
||||
|
||||
.check_ack:
|
||||
; Look at control flags - expecting an ACK
|
||||
@ -833,6 +867,8 @@ proc stateTCB_SYN_RECEIVED stdcall, sockAddr:DWORD
|
||||
jz .exit
|
||||
|
||||
mov [ebx + SOCKET.TCBState], TCB_ESTABLISHED
|
||||
.signal:
|
||||
call signal_network_event
|
||||
|
||||
.exit:
|
||||
ret
|
||||
@ -843,6 +879,15 @@ proc stateTCB_ESTABLISHED stdcall, sockAddr:DWORD
|
||||
; Here we are expecting data, or a request to close
|
||||
; OR both...
|
||||
|
||||
; Ignore all packets with sequnce number other than next expected
|
||||
|
||||
; recv.nxt is in dword [edx+24], in inet format
|
||||
; recv seq is in [sktAddr]+56, in inet format
|
||||
; just do a comparision
|
||||
mov eax, [ebx + SOCKET.RCV_NXT]
|
||||
cmp eax, [edx + 20 + TCP_PACKET.SequenceNumber]
|
||||
jne .exit
|
||||
|
||||
; Did we receive a FIN or RST?
|
||||
test [edx + 20 + TCP_PACKET.Flags], TH_FIN
|
||||
jz .check_ack
|
||||
@ -878,6 +923,7 @@ proc stateTCB_ESTABLISHED stdcall, sockAddr:DWORD
|
||||
@@: ; Send an ACK to that fin, and enter closewait state
|
||||
|
||||
mov [ebx + SOCKET.TCBState], TCB_CLOSE_WAIT
|
||||
call signal_network_event
|
||||
lea esi, [ebx + SOCKET.RCV_NXT]
|
||||
mov eax, [esi] ; save original
|
||||
call inc_inet_esi
|
||||
@ -900,21 +946,6 @@ proc stateTCB_ESTABLISHED stdcall, sockAddr:DWORD
|
||||
mov [ebx + SOCKET.wndsizeTimer], 1
|
||||
|
||||
@@: ; OK, here is the deal
|
||||
; My recv.nct field holds the seq of the expected next rec byte
|
||||
; if the recevied sequence number is not equal to this, do not
|
||||
; increment the recv.nxt field, do not copy data - just send a
|
||||
; repeat ack.
|
||||
|
||||
; recv.nxt is in dword [edx+24], in inet format
|
||||
; recv seq is in [sktAddr]+56, in inet format
|
||||
; just do a comparision
|
||||
mov ecx, [ebx + SOCKET.RCV_NXT]
|
||||
cmp [ebx + SOCKET.TCBState], TCB_CLOSE_WAIT
|
||||
jne @f
|
||||
mov ecx, eax
|
||||
|
||||
@@: cmp ecx, [edx + 20 + TCP_PACKET.SequenceNumber]
|
||||
jne .ack
|
||||
|
||||
|
||||
; Read the data bytes, store in socket buffer
|
||||
@ -935,7 +966,7 @@ proc stateTCB_ESTABLISHED stdcall, sockAddr:DWORD
|
||||
pop ebx
|
||||
|
||||
push ecx
|
||||
push [ebx + SOCKET.PID] ; get socket owner PID
|
||||
push ebx
|
||||
mov eax, [ebx + SOCKET.rxDataCount]
|
||||
add eax, ecx
|
||||
cmp eax, SOCKETBUFFSIZE - SOCKETHEADERSIZE
|
||||
@ -955,21 +986,8 @@ proc stateTCB_ESTABLISHED stdcall, sockAddr:DWORD
|
||||
mov [ebx + SOCKET.lock], 0 ; release mutex
|
||||
|
||||
; flag an event to the application
|
||||
pop eax
|
||||
mov ecx, 1
|
||||
mov esi, TASK_DATA + TASKDATA.pid
|
||||
|
||||
.next_pid:
|
||||
cmp [esi], eax
|
||||
je .found_pid
|
||||
inc ecx
|
||||
add esi, 0x20
|
||||
cmp ecx, [TASK_COUNT]
|
||||
jbe .next_pid
|
||||
|
||||
.found_pid:
|
||||
shl ecx, 8
|
||||
or [ecx + SLOT_BASE + APPDATA.event_mask], EVENT_NETWORK ; stack event
|
||||
pop ebx
|
||||
call signal_network_event
|
||||
|
||||
pop ecx
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user