On 07/04/15 07:03, Eric Dumazet wrote: > On Mon, 2015-04-06 at 21:45 -0700, Tom Herbert wrote: >> On Mon, Apr 6, 2015 at 8:51 PM, David Miller <davem@xxxxxxxxxxxxx> wrote: >>> I don't see what is convoluted about using the correct socket for >>> sending L3 protocol frames. That's in fact how it's _supposed_ to >>> work. And consistently having a proper matching socket available >>> makes it so that, long-term, we'll never have to deal with this issue >>> ever again. >> I guess this is where I'm confused. We can send just about anything >> over GRE also, but have never needed a transmit socket for that. Is >> UDP encapsulation so different, or is GRE equally broken also? Also, >> will we need to add the socket to FOU and GUE then? > GRE encap is very low level (not L3), and no socket simply sends GRE > packets as is. FWIW, GRE encap is also broken for IPv6, it's layer 2, but only 8 bytes can be used of the IPv6 address, because it uses sll_addr. -- Wilco
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