Messages in this thread | | | From | Neil Brown <> | Date | Sat, 15 Feb 2003 12:53:53 +1100 |
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Subject: Re: Routing problem with udp, and a multihomed host in 2.4.20 In-Reply-To: message from Herbert Xu on Saturday February 15 References: <15948.13879.734412.313081@notabene.cse.unsw.edu.au> <E18jpaa-0007Rc-00@gondolin.me.apana.org.au> X-Mailer: VM 7.07 under Emacs 20.7.2 FCC: ~/.mail/linux X-face: [Gw_3E*Gng}4rRrKRYotwlE?.2|**#s9D<ml'fY1Vw+@XfR[fRCsUoP?K6bt3YD\ui5Fh?f LONpR';(ql)VM_TQ/<l_^D3~B:z$\YC7gUCuC=sYm/80G=$tt"98mr8(l))QzVKCk$6~gldn~*FK9x 8`;pM{3S8679sP+MbP,72<3_PIH-$I&iaiIb|hV1d%cYg))BmI)AZ --text follows this line-- On Saturday February 15, herbert@gondor.apana.org.au wrote: > Neil Brown <neilb@cse.unsw.edu.au> wrote: > > > > It turns out that the problem occurs when send_msg is used to send a > > UDP packet, and the control information contains > > struct in_pktinfo { > > unsigned int ipi_ifindex; /* Interface index */ > > struct in_addr ipi_spec_dst; /* Local address */ > > struct in_addr ipi_addr; /* Header Destination address */ > > }; > > specifying the address and interface of the message that we are > > replying to. > > So your application is forcing the packet to go out on a specific > interface bypassing the routing table...
No. My application (which is just using standard rpc server libraries) is saying "This is in reply to a request that came in through a given interface".
It is not reasonable to treat that statement as equivalent to: "This packet must go out that interface"
which is what appears to be happening.
NeilBrown
> -- > Debian GNU/Linux 3.0 is out! ( http://www.debian.org/ ) > Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au> > Home Page: http://gondor.apana.org.au/~herbert/ > PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt - 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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