Date: Wed, 11 Aug 2010 08:30:50 +0200 From: Michael Tuexen <Michael.Tuexen@lurchi.franken.de> To: Sebastien Decugis <sdecugis@nict.go.jp> Cc: freebsd-net@freebsd.org Subject: Re: FreeBSD SCTP support? Message-ID: <7EBDF546-F92F-405A-BFEF-07A28EACA6DF@lurchi.franken.de> In-Reply-To: <4C61FF94.2090801@nict.go.jp> References: <4C61FF94.2090801@nict.go.jp>
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On Aug 11, 2010, at 3:40 AM, Sebastien Decugis wrote: > Hello, > > I am encountering a problem with SCTP stack in FreeBSD 8.1 release (on > amd64); and I am looking for the correct place to report a bug. Would > someone from this list be kind enough to give me direction where I > should report the problem? I am totally new to FreeBSD and I was not > able to find a better place than this mailing-list so far... Reporting it here is the correct place. > > If by any change this list is the correct place, you can find the > description of the problem and steps to reproduce here: > http://www.freebsd.org/cgi/query-pr.cgi?pr=149488 It was reported here yesterday and I responded already... > > As I understand the answer in that bug report, SCTP is not part of > FreeBSD? But I did not install anything special, nor could find a > dedicated place on the Internet so far... SCTP is part of FreeBSD. But the point is that your problem is not related to a bug in FreeBSD but in your application. If you use /* 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; } the problem is solved. You were not using the CMSG stuff correctly, so on 64-bit platforms the problem showed up. I hope this helps, if not, feel free to ask any question or contact me directly. BTW: Do you have a running implementation of RFC 3436 which supports multiple streams? Best regards Michael > > Thank you! > Best regards, > Sebastien. > > -- > Sebastien Decugis > Research fellow > Network Architecture Group > NICT (nict.go.jp) > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >
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