Hi everyone,

I am currently trying to run a client/server program using Fedora Core 2, kernel version 2.6.5. The program compiles without any warning and/or errors but during runtime, an "Invalid argument" error occurs during the call to sendmsg(int fd, const struct msghdr *msghdr, int flags).

I am quite sure that my arguments to sendmsg() are correct ... but why do I get the said error during runtime? Is this a bug? Do I need to update/configure my current kernel settings?

Im a newbie in both linux and networking. Please feel free to post questions/clarifications so I can provide more details regarding the said problem. Any assistance would be greatly appreciated . Thank you very much.

P.S. Merry Christmas and a Happy New Year to all.

Look at the "man 3p sendmsg" man-page:

EINVAL The sum of the iov_len values overflows an ssize_t.

Hi jschiwal,

Thanks for helping ... I was able to point out the source of the problem. Thanks a lot ^_^.

-John-

Hi,

I am a newbie into networking and unfortuntely I am facing a similar problem where, sendmsg() fails saying invalid argument. The iov_len and io_vec fields are memset to 0, so the problem of io_len values summation overflowing shouldn't occur. But still, am I missing any other setting over here? Any pointers would be helpful.

Thanks,
Darshan