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fix icmp type/code 3/0 response handling to port scans (port is filtered)

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fyodor
2005-12-03 04:41:02 +00:00
parent 0551dc6964
commit 98ab4df168
2 changed files with 7 additions and 0 deletions
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4
CHANGELOG
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@@ -1,5 +1,9 @@
# Nmap Changelog ($Id$) # Nmap Changelog ($Id$)
o Better handle ICMP type 3, code 0 (network unreachable) responses to
port scan packets. These are rarely seen when scanning hosts that
are actually online, but are still worth handling.
o Fixed a problem with the -S and option on Windows reporting "Failed o Fixed a problem with the -S and option on Windows reporting "Failed
to resolve/decode supposed IPv4 source address". The -D (decoy) to resolve/decode supposed IPv4 source address". The -D (decoy)
option was probably broken on that platform too. Thanks to kx option was probably broken on that platform too. Thanks to kx

3
scan_engine.cc
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@@ -2798,6 +2798,9 @@ static bool get_pcap_result(UltraScanInfo *USI, struct timeval *stime) {
break; break;
} }
switch(icmp->icmp_code) { switch(icmp->icmp_code) {
case 0: /* Network unreachable */
newstate = PORT_FILTERED;
break;
case 1: /* Host Unreachable */ case 1: /* Host Unreachable */
newstate = PORT_FILTERED; newstate = PORT_FILTERED;
break; break;