Nmap Development mailing list archives
Re: get_max_open_descriptors() is more generous than Nsock.
From: "Luis MartinGarcia." <luis.mgarc () gmail com>
Date: Mon, 19 Dec 2011 14:02:01 +0100
On 12/19/2011 01:56 PM, Henri Doreau wrote:
Hi Luis, 2011/12/19 Luis MartinGarcia. <luis.mgarc () gmail com>:nsock_core.c:186: Attempt to FD_SET fd 1024, which is not less than FD_SETSIZE (1024). Try using a lower parallelism. Has anyone experienced this behavior? Is nsock failing to determine the maximum number of descriptors per process? Is it get_max_open_descriptors()'s fault?This is neither nsock nor netutil's fault. The problem is that select(2) can't deal with more than FD_SETSIZE descriptors. This number is usually set to 1024, regardless your system configuration for resource limits. Removing this select(2)-related limitation was one of my primary aims for writing nsock-engines. Depending on how get_max_open_descriptors() is used it might make sense to make the function return MIN(FD_SETSIZE, <rlimit>).
Hi Henri, Thanks for your quick response. I should know the answer to this but, what's the current status of the nsock-engines branch? Has it been merged into trunk? If it has, how do I determine if the selected engine is select()-based or uses something better? I'd like to find a way to use more than 1024 descriptors when possible, not just use 1024 by default. Thanks! Regards, Luis MartinGarcia. _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://seclists.org/nmap-dev/
Current thread:
- get_max_open_descriptors() is more generous than Nsock. Luis MartinGarcia. (Dec 19)
- Re: get_max_open_descriptors() is more generous than Nsock. Henri Doreau (Dec 19)
- Re: get_max_open_descriptors() is more generous than Nsock. Luis MartinGarcia. (Dec 19)
- Re: get_max_open_descriptors() is more generous than Nsock. Henri Doreau (Dec 19)
- Re: get_max_open_descriptors() is more generous than Nsock. Luis MartinGarcia. (Dec 19)
- Re: get_max_open_descriptors() is more generous than Nsock. Henri Doreau (Dec 19)
- Re: get_max_open_descriptors() is more generous than Nsock. Luis MartinGarcia. (Dec 19)
- Re: get_max_open_descriptors() is more generous than Nsock. Luis MartinGarcia. (Dec 19)
- Re: get_max_open_descriptors() is more generous than Nsock. Henri Doreau (Dec 19)