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IPv4: Dont crash when there is no route to host.

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git-svn-id: svn://kolibrios.org@6122 a494cfbc-eb01-0410-851d-a64ba20cac60
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hidnplayr
2016-02-01 19:43:10 +00:00
parent 63743484d7
commit cbca315c7d
2 changed files with 16 additions and 7 deletions
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15
kernel/trunk/network/IPv4.inc
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@@ -1,6 +1,6 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; IPv4.INC ;;
@@ -634,6 +634,8 @@ ipv4_output:
push ecx ax edi
mov eax, edi
call ipv4_route ; outputs device number in edi, dest ip in eax, source IP in edx
test eax, eax
jz .no_route
push edx
test edi, edi
jz .loopback
@@ -683,6 +685,12 @@ ipv4_output:
xor eax, eax
ret
.no_route:
DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: No route to host!\n"
add esp, 2*4+2
xor eax, eax
ret
.arp_error:
DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ARP error=%x\n", eax
add esp, 4
@@ -917,7 +925,7 @@ endp
; ebx = outgoing device / 0 ;
; edx = Source IP ;
; ;
; OUT: eax = Destination IP (or gateway IP) ;
; OUT: eax = Destination IP (may be gateway), 0 on error ;
; edx = Source IP ;
; edi = device number*4 ;
; ;
@@ -926,7 +934,7 @@ endp
; ;
;-----------------------------------------------------------------;
align 4
ipv4_route: ; TODO: return error if no valid route found
ipv4_route:
test ebx, ebx
jnz .got_device
@@ -979,6 +987,7 @@ ipv4_route: ; TODO: return error if no valid route found
ret
.fail:
xor eax, eax
ret