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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
immediately followed by a strtoul, outside of utils.cc.
* Investigate and fix a bug: nsi_pcap_linktype(), nping.cc:1717, returns
something different than DLT_EN10MB when sending UDP packets with the same
source and destination port number. If(dport==sport) it breaks;
This happens also in TCP mode, and even in ICMP mode. This is weird. It might
have something to do with the BPF filter. Some examples:
luis@Aberdeen:~$ sudo nping --udp 163.117.131.31 -p53
Starting Nping 0.5.30BETA1 ( http://nmap.org/nping ) at 2010-05-21 11:36 CEST
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.
* In some cases, when using nping through a VPN connection, nsi_pcap_linktype()
returns something different to DLT_EN10MB, and Nping fatals. Investigate
why this happens to nping and is not a problem for Nmap. Also, determine
why this doesn't happen all the time. What does it change between these
two?: sudo nping --udp 1.1.1.1 -g 999 -p998
sudo nping --udp 1.1.1.1 -g 999 -p999
The first one works, and the other one fatals with the "Currently only
Ethernet is supported." (error message @ nping.cc:1717).
/*****************************************************************************