Re(2): Not able to get success with setsockopt
Re(2): Not able to get success with setsockopt
- Subject: Re(2): Not able to get success with setsockopt
- From: "Peter Lovell" <email@hidden>
- Date: Fri, 17 Feb 2006 10:33:10 -0500
>
>On Feb 17, 2006, at 05:02 , innovator information wrote:
>
>> Hello,
>>
>> I am not able to pass through setsockopt in Mac OS Tiger.
>>
>> setsockopt( socketFd, SOL_SOCKET, SO_BROADCAST, &cOptVal, sizeof(char)
>> where cOptVal is 1.
>>
>> It is always returning < 0.
>> what is wrong with this.
>
>A return value of "-1" from a system call is usually accompanied by
>an explanation in the global "errno" (see the man page for setsockopt
>()). That will tell you what is wrong.
... and the first thing I'd check is the size of the variable to pass.
I suspect that you might have more luck defining it as an "int" and
saying it's four bytes.
This has always been a source of much confusion, at least for me.
Cheers.....Peter
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