Messages in this thread | | | Date | Wed, 14 Jun 2006 15:14:18 -0700 (PDT) | Subject | Re: SO_REUSEPORT and multicasting | From | David Miller <> |
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Instead of degenerating this mailing list into a BSD socket programming class, you may find this informative:
http://www.unixguide.net/network/socketfaq/4.11.shtml
and it's covered extensively in W. Richard Steven's book, TCP/IP Illustrated, Volume 2. It is considered the bible on BSD socket programming.
Particularly telling is the final paragraph from that web page which reads:
Basically SO_REUSEPORT is a BSD'ism that arose when multicast was added, evne though it was not used in the original Steve Deering code. I believe some BSD-derived systems may also include it. SO_REUSEPORT lets you bind the same address *and* port, but only if all the binders have specified it. But when binding to multicast address (its main use), SO_REUSEADDR is considered identical to SO_REUSEPORT (p. 731, "TCP/IP Illustrated, Volume 2"). So for portability of multicast applications, I always use SO_REUSEADDR.
I STRONGLY suggest you go read that reference to page 731 in the Steven book. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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