NetNews Usenet Archive 1992 #26/NN_1992_26.iso/spool/comp/unix/programm/5171

Internet Message Format | 1992-11-06 | 1.5 KB

Path: sparky!uunet!portal!lll-winken!parc!decwrl!elroy.jpl.nasa.gov!swrinde!cs.utexas.edu!ut-emx!ibmchs!auschs!awdalpha.austin.ibm.com!awdprime.austin.ibm.com!ravikm
From: [e-mail] (Ravi K Mandava)
Newsgroups: comp.unix.programmer
Subject: Re: Socket Programming Help
Message-ID: <[e-mail]>
Date: 5 Nov 92 16:04:51 GMT
References: <[e-mail]>
Sender: [e-mail] (USENET News)
Reply-To: [e-mail]
Organization: IBM Austin
Lines: 24
Originator: [e-mail]


In article <[e-mail]>, [e-mail] (Kenneth Soh) writes:
> I keep having "Address already in use" (errno 48) problem
> everytime I restart the deamon with the same port number -
> the bind() function returns error. The same port number
> seems to be "released" and re-usable after say, half an
> hour.

    Before bind(), set your socket to be reused by calling setsockopt().
        Ex:    int on = 1;
        ... setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, (char *)&on,
                   (int)(sizeof on));

> sin.sin_addr.s_addr = INADDR_ANY;
> sin.sin_port = atoi(argv[1]); <-- just a port number

    Also, if these are not already in network format, use
    sin.sin_addr.s_addr = htonl((ulong_t)INADDR_ANY);
    sin.sin_port = htons((ushort_t)atoi(*argv));

--
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Ravi K Mandava        email:    piobe![e-mail]
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