Solved

select(2)'ing a datagram socket

Posted on 2002-07-26
2
619 Views
Last Modified: 2012-06-27
See title... it doesnt seem to work (linux 2.4.18)
Strace looks like:

socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 8
setsockopt(8, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
bind(8, {sin_family=AF_INET, sin_port=htons(1029), sin_addr=inet_addr("0.0.0.0")}}, 16) = 0
fcntl64(8, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
select(9, [3 4 5 6 7 8], [], [], {1, 0}) = 1 (in [8], left {0, 220000})
getsockopt(8, SOL_IP, 0x50 /* IP_??? */, 0xbffff65c, 0xbffff648) = -1 ENOPROTOOPT (Protocol not available)
close(8)                                = 0
select(9, [3 4 5 6 7 8], [], [], {1, 0}) = -1 EBADF (Bad file descriptor)

My question is: Is this at all possible? If yes, how (what options)? If no, how should i do this considering i'm already select()'ing tcp ports (which works fine). Is there a generic way (for both stream and dgram) to do this?
0
Comment
Question by:m00
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 

Author Comment

by:m00
ID: 7180905
Oops, its not the select() of course, the problem is getsockopt.. maybe somebody can give me a clue why
getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, sa, salen) wouldnt work there then.. :/
datagram socket have a destination surely?
0
 
LVL 5

Accepted Solution

by:
bryanh earned 300 total points
ID: 7181258
> datagram socket have a destination surely?

No, that's what it means to be a datagram socket.  You can send to anywhere at any time through it (or receive from anywhere at any time through it).
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Have you ever been frustrated by having to click seven times in order to retrieve a small bit of information from the web, always the same seven clicks, scrolling down and down until you reach your target? When you know the benefits of the command l…
The purpose of this article is to demonstrate how we can upgrade Python from version 2.7.6 to Python 2.7.10 on the Linux Mint operating system. I am using an Oracle Virtual Box where I have installed Linux Mint operating system version 17.2. Once yo…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

756 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question