Date: Tue, 10 Aug 2010 12:06:20 +0200 From: Michael Tuexen <Michael.Tuexen@lurchi.franken.de> To: brucec@FreeBSD.org Cc: freebsd-net@FreeBSD.org, freebsd-amd64@FreeBSD.org Subject: Re: amd64/149488: SCTP streams not working on AMD64 platform Message-ID: <31388BBC-AA82-46F8-B893-E81588FD97E9@lurchi.franken.de> In-Reply-To: <201008100920.o7A9K9Gv096464@freefall.freebsd.org> References: <201008100920.o7A9K9Gv096464@freefall.freebsd.org>
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Dear all,
it is not a problem in the kernel. The application does not handle
the cmsg stuff correctly in send_on_stream().
Using
/* Send a message on a socket and a particular stream */
void send_on_stream(int sock, unsigned int strid, unsigned char * msg, size_t sz)
{
struct msghdr mhdr;
struct iovec iov;
struct cmsghdr *cmsg;
struct sctp_sndrcvinfo *info;
char buffer[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
ssize_t ret;
memset(&mhdr, 0, sizeof(mhdr));
memset(&iov, 0, sizeof(iov));
memset(buffer, 0, CMSG_SPACE(sizeof(struct sctp_sndrcvinfo)));
/* IO Vector: message data */
iov.iov_base = msg;
iov.iov_len = sz;
/* Anciliary data: specify SCTP stream */
cmsg = (struct cmsghdr *)buffer;
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_SNDRCV;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
info->sinfo_stream = strid;
mhdr.msg_iov = &iov;
mhdr.msg_iovlen = 1;
mhdr.msg_control = buffer;
mhdr.msg_controllen = cmsg->cmsg_len;
if ( (ret = sendmsg(sock, &mhdr, 0)) < 0) {
perror("sendmsg");
exit (1);
}
ASSERT( ret == sz ); /* There should not be partial delivery with sendmsg... */
return;
}
solves the problem.
Best regards
Michael
On Aug 10, 2010, at 11:20 AM, brucec@FreeBSD.org wrote:
> Synopsis: SCTP streams not working on AMD64 platform
>
> Responsible-Changed-From-To: freebsd-amd64->freebsd-net
> Responsible-Changed-By: brucec
> Responsible-Changed-When: Tue Aug 10 09:19:47 UTC 2010
> Responsible-Changed-Why:
> Over to maintainer(s).
>
> http://www.freebsd.org/cgi/query-pr.cgi?pr=149488
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