Can't recv()

Ephracis · 01-03-2005, 01:03 AM

I have a really big program here and at the first recv() on a socket I get error. The recv() return -1 and I can't understand why. It has been working before (I reinstalled slackware).

The program is too complex to show or explain. I just wondered if someone knows some possible wrongs when recv() returnes -1.

I can send() data to the socket and it works fine. But whenever I try to recv() it fails and returns -1.

btmiller · 01-03-2005, 01:16 AM

Check what the OS has set errno to (see man errno) and check it against errors possibly raised by the recv system call (from the man page there are several -- man recv will enumerate them for you).

Ephracis · 01-04-2005, 02:49 PM

Ok. So I checked and I get errno set to 14, which means EFAULT (Bad address).

Now what should I do with this information. The code worked before I reinstalled slackware, what can the problem be? And which address is bad, the servers or the clients? Notice that I can send() as much as I want, the problem is to recv().