Re: Please help test libpcap upgrade

[Daniel Miller <bonsaiviking () gmail com>]

On Sun, May 3, 2015 at 11:20 AM, Dario Bertini <berdario () gmail com> wrote:

> I still get the false packet loss:
>
>
> dario@curie /t/nmap-libpcap-1.7> ./nmap --version
>
> Nmap version 6.47SVN ( http://nmap.org )
> Platform: x86_64-unknown-linux-gnu
> Compiled with: nmap-liblua-5.2.3 openssl-1.0.1f nmap-libpcre-7.6
> nmap-libpcap-1.7.3 nmap-libdnet-1.12 ipv6
> Compiled without:
> Available nsock engines: epoll poll select
> dario@curie /t/nmap-libpcap-1.7> sudo ./nmap -sS -vv 10.129.121.20 -n
>
> Starting Nmap 6.47SVN ( http://nmap.org ) at 2015-05-03 17:14 BST
> Initiating Ping Scan at 17:14
> Scanning 10.129.121.20 [4 ports]
> Completed Ping Scan at 17:14, 0.21s elapsed (1 total hosts)
> Initiating SYN Stealth Scan at 17:14
> Scanning 10.129.121.20 [1000 ports]
> Discovered open port 21/tcp on 10.129.121.20
> Discovered open port 22/tcp on 10.129.121.20
> Increasing send delay for 10.129.121.20 from 0 to 5 due to 157 out of
> 523 dropped probes since last increase.
> Increasing send delay for 10.129.121.20 from 5 to 10 due to 52 out of
> 171 dropped probes since last increase.
> Increasing send delay for 10.129.121.20 from 10 to 20 due to 11 out of
> 34 dropped probes since last increase.
> Increasing send delay for 10.129.121.20 from 20 to 40 due to 11 out of
> 35 dropped probes since last increase.
> Increasing send delay for 10.129.121.20 from 40 to 80 due to
> max_successful_tryno increase to 4
>
>
> The same happens when scanning scanme.nmap.org

Dario,

Thanks for the report. If you `make clean` then do `sed -i
'/PCAP_SUPPORT_PACKET_RING/s/1/0/' libpcap/config.h` before making again,
does the problem resolve? Also, what kernel version are you using?


> Also, not quite sure why, but make check (for zenmap?) apparently fails
> here:
>
> make[1]: Leaving directory `/tmp/nmap-libpcap-1.7/nsock/src'
> Traceback (most recent call last):
>   File "run_tests.py", line 15, in <module>
>     start_dir=glob.glob("build/lib.*")[0],
> IndexError: list index out of range
> make: *** [zenmap_check] Error 1
>
>
> I don't have any build/ directory after building nmap

It should actually be looking for zenmap/build. Did you configure to build
zenmap? Do you have Python 2 (not 3) installed? Our test discovery is
admittedly poor, so if you have feedback on that, we'd appreciate it on the
Github Issue we have open for that: https://github.com/nmap/nmap/issues/85

Dan

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