Nmap Development mailing list archives
Re: ncat should try connecting to all resolved addresses, not only the first one
From: Jacek Wielemborek <d33tah () gmail com>
Date: Mon, 09 Dec 2013 20:24:57 +0100
03/12/2013 15:20:34 Jaromir Koncicky <jkoncick () redhat com>:
Bump: Could you please look and this and give me a feedback? I'd like to finish this issue and make an acceptable patch which could be included in nmap. Thanks!
Hello, I took a look at your patch from the comment #11 and it looks fine, applies to the latest SVN with no problem and builds under Linux and FreeBSD properly. Also tested ncat-test.pl under Linux to make sure it didn't break anything and tried to build it under Windows. Unfortunately, for some reason this involves compiling under Microsoft Visual C++ in C++ mode and the original patch lead to the following errors:
Build FAILED. "C:\cygwin\home\d33tah\shared\ncat\nmap-trunk\ncat\ncat.vcxproj" (default target) (1) -> (ClCompile target) -> c:\cygwin\home\d33tah\shared\ncat\nmap-trunk\ncat\ncat_connect.c(755): error C2440: 'initializing' : cannot convert from 'void *' to 'sockaddr_list *' [C:\cygwin\home\d33tah\shared\ncat\nmap-trunk\ncat\ncat.vcxproj] c:\cygwin\home\d33tah\shared\ncat\nmap-trunk\ncat\ncat_core.c(310): error C2440: '=' : cannot convert from 'void *' to 'sockaddr_list *' [C:\cygwin\home\d33tah\shared\ncat\nmap-trunk\ncat\ncat.vcxproj]> 0 Warning(s) 2 Error(s) Time Elapsed 00:00:04.21
I fixed the casts, changed the coding style a bit and replaced malloc with safe_malloc. I attach the new patch (feel encouraged to diff it against your version to see what I changed). Before I merge the patch, could you post some test code, most preferrably as a patch to ncat_test.pl, so I could have a snippet to try this out on different platforms? Also, I'm a bit worried about the introduction of two new global variables - could you please explain me why targetaddrs_allocated is necessary here? Perhaps a new structure would be a better choice here, or a bit different code paths/return arguments? Also, I hadn't checked if a version of resolve_multi wasn't already in the nsock/nbase libraries. Jacek Wielemborek
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Current thread:
- Re: ncat should try connecting to all resolved addresses, not only the first one Jaromir Koncicky (Nov 07)
- Re: ncat should try connecting to all resolved addresses, not only the first one Jaromir Koncicky (Dec 03)
- Re: ncat should try connecting to all resolved addresses, not only the first one Jacek Wielemborek (Dec 09)
- Re: ncat should try connecting to all resolved addresses, not only the first one Jaromir Koncicky (Dec 11)
- Re: ncat should try connecting to all resolved addresses, not only the first one David Fifield (Dec 27)
- Re: ncat should try connecting to all resolved addresses, not only the first one Jacek Wielemborek (Dec 09)
- Re: ncat should try connecting to all resolved addresses, not only the first one Fyodor (Dec 12)
- Re: ncat should try connecting to all resolved addresses, not only the first one Jacek Wielemborek (Dec 13)
- Re: ncat should try connecting to all resolved addresses, not only the first one Fyodor (Dec 15)
- Re: ncat should try connecting to all resolved addresses, not only the first one Jacek Wielemborek (Dec 15)
- Re: ncat should try connecting to all resolved addresses, not only the first one Fyodor (Dec 15)
- Re: ncat should try connecting to all resolved addresses, not only the first one Jaromir Koncicky (Dec 16)
- Re: ncat should try connecting to all resolved addresses, not only the first one Jaromir Koncicky (Dec 03)
- Re: ncat should try connecting to all resolved addresses, not only the first one Daniel Miller (Dec 13)