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Rewritten the TODO item added in r17620. The problem must be that I was using nping through a VPN connection. It still crashes when sport==dport, but that does not happen when using it through a regular inet connection

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luis
2010-05-21 10:59:00 +00:00
parent 4a4051ee2c
commit cf2cdea42c
1 changed files with 8 additions and 25 deletions
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todo/nping.txt
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@@ -206,31 +206,14 @@
around strtoul). There is nowhere that isNumber_u* is called without it being around strtoul). There is nowhere that isNumber_u* is called without it being
immediately followed by a strtoul, outside of utils.cc. immediately followed by a strtoul, outside of utils.cc.
* Investigate and fix a bug: nsi_pcap_linktype(), nping.cc:1717, returns * In some cases, when using nping through a VPN connection, nsi_pcap_linktype()
something different than DLT_EN10MB when sending UDP packets with the same returns something different to DLT_EN10MB, and Nping fatals. Investigate
source and destination port number. If(dport==sport) it breaks; why this happens to nping and is not a problem for Nmap. Also, determine
This happens also in TCP mode, and even in ICMP mode. This is weird. It might why this doesn't happen all the time. What does it change between these
have something to do with the BPF filter. Some examples: two?: sudo nping --udp 1.1.1.1 -g 999 -p998
sudo nping --udp 1.1.1.1 -g 999 -p999
luis@Aberdeen:~$ sudo nping --udp 163.117.131.31 -p53 The first one works, and the other one fatals with the "Currently only
Starting Nping 0.5.30BETA1 ( http://nmap.org/nping ) at 2010-05-21 11:36 CEST Ethernet is supported." (error message @ nping.cc:1717).
SENT (0.1140s) UDP 163.117.203.225:53 > 163.117.131.31:53 ttl=64 id=23488 iplen=28
Currently only Ethernet is supported.
-----
luis@Aberdeen:~$ sudo nping --udp 163.117.131.31 -p59 -g 59
Starting Nping 0.5.30BETA1 ( http://nmap.org/nping ) at 2010-05-21 11:36 CEST
SENT (0.1060s) UDP 163.117.203.225:59 > 163.117.131.31:59 ttl=64 id=57091 iplen=28
Currently only Ethernet is supported.
-----
luis@Aberdeen:~$ sudo nping --tcp 163.117.131.31 -p53 -g53
Starting Nping 0.5.30BETA1 ( http://nmap.org/nping ) at 2010-05-21 11:37 CEST
SENT (0.1070s) TCP 163.117.203.225:53 > 163.117.131.31:53 S ttl=64 id=29612 iplen=40 seq=4244174393 win=1480
Currently only Ethernet is supported.
-----
luis@Aberdeen:~$ sudo nping 163.117.131.31 -p53 -g53 --icmp
Starting Nping 0.5.30BETA1 ( http://nmap.org/nping ) at 2010-05-21 11:37 CEST
SENT (0.1060s) ICMP 163.117.203.225 > 163.117.131.31 Echo request (type=8/code=0) ttl=64 id=23394 iplen=28
Currently only Ethernet is supported.
/***************************************************************************** /*****************************************************************************