kernel: fix sysfn 68.30 (unload driver)

- restore the SRV handle after DRV_EXIT (ecx is clobbered by the driver)
- restore esp via ebp: START may be cdecl or stdcall
- pass the SRV to free in eax, not on the stack
- check SRV.base before calling DRV_EXIT

kernel/trunk/core/memory.inc

@@ -1233,25 +1233,27 @@ f68:
         mov     eax, [ecx + SRV.entry]
         test    eax, eax
         jz      .fail
-        push    ecx    ;save handl
+        mov     eax, -2 ;error free RAM
+        cmp     [ecx + SRV.base], 0
+        je      .fail
 
+        push    ecx         ;save handl
+        mov     ebp, esp    ;START may be cdecl or stdcall
         push    edx         ;cmdline
         push    DRV_EXIT
-        call    eax   ;the result is not checked
-        lea     esp, [esp+8]
-        push    ecx
+        call    [ecx + SRV.entry]   ;the result is not checked
+        mov     esp, ebp
+        pop     esi
 
-        mov     ebx, [ecx + SRV.base]
-        mov     eax, -2 ;error free RAM
-        test    ebx, ebx
-        jz      .fail
-        stdcall kernel_free, ebx ;del driver
-
-        mov     eax, [ecx + SRV.fd]
-        mov     edx, [ecx + SRV.bk]
+        mov     eax, [esi + SRV.fd]
+        mov     edx, [esi + SRV.bk]
         mov     [edx + SRV.fd], eax
         mov     [eax + SRV.bk], edx
-        stdcall free, ecx
+        push    eax
+        stdcall kernel_free, [esi + SRV.base] ;del driver
+        mov     eax, esi
+        call    free        ;eax = mem
+        pop     eax
         ;dec     [count_services]
 
         mov     [esp + SYSCALL_STACK.eax], eax

kernel/trunk/network/tcp.inc

@@ -72,7 +72,7 @@ TCP_time_rtt_default    = 5           ; default Round Trip Time (3,2s)
 TCP_time_srtt_default   = 0           ;
 TCP_time_max_idle       = 8*TCP_time_keep_interval      ; FIXME
 
-TCP_time_connect        = 1000        ; in 1/100s (default=10s)
+TCP_time_connect        = 300         ; in 1/100s (default=3s)
 
 ; timer constants
 TCP_max_rxtshift        = 12          ; max retransmissions waiting for ACK

kernel/trunk/network/tcp_input.inc

@@ -399,7 +399,6 @@ endl
         bswap   eax
         mov     [ebx + TCP_SOCKET.ts_val], eax
         lodsd                                   ; timestamp echo reply
-        bswap   eax
         mov     [ebx + TCP_SOCKET.ts_ecr], eax
         or      [temp_bits], TCP_BIT_TIMESTAMP
 
@@ -979,7 +978,7 @@ endl
 
         inc     [ebx + TCP_SOCKET.t_dupacks]
         cmp     [ebx + TCP_SOCKET.t_dupacks], TCP_re_xmit_thresh
-        jb      .ack_processed
+        jb      .dup_ack_complete
         ja      .another_lost
 
         DEBUGF  DEBUG_NETWORK_VERBOSE, "TCP_input: Re-transmitting lost segment\n"

kernel/trunk/network/tcp_output.inc

@@ -391,14 +391,8 @@ endl
         jz      .no_timestamp
 
   .timestamp:
-        push    ebx
-        mov     ebx, [eax + TCP_SOCKET.ts_recent]
-        bswap   ebx
-        xchg    ebx, [esp]                      ; TSecr
-        push    ebx
-        mov     ebx, [timer_ticks]
-        bswap   ebx
-        xchg    ebx, [esp]                      ; TSval
+        pushd   0
+        pushd   [timer_ticks]
         pushd   TCP_OPT_NOP + TCP_OPT_NOP shl 8 + TCP_OPT_TIMESTAMP shl 16 + 10 shl 24
         add     di, 12
 
@@ -419,12 +413,10 @@ endl
 ; check if we don't exceed the max segment size
 
         add     esi, edi                        ; total TCP segment size
-        mov     ebx, [eax + TCP_SOCKET.t_maxseg]
-        add     ebx, sizeof.TCP_header          ; MSS does not count the header
-        cmp     esi, ebx
+        cmp     esi, [eax + TCP_SOCKET.t_maxseg]
         jbe     .no_overflow
 
-        mov     esi, ebx
+        mov     esi, [eax + TCP_SOCKET.t_maxseg]
         or      [temp_bits], TCP_BIT_SENDALOT
   .no_overflow: