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8624f4347e
The divert(4) is not a protocol of IPv4. It is a socket to intercept packets from ipfw(4) to userland and re-inject them back. It can divert and re-inject IPv4 and IPv6 packets today, but potentially it is not limited to these two protocols. The IPPROTO_DIVERT does not belong to known IP protocols, it doesn't even fit into u_char. I guess, the implementation of divert(4) was done the way it is done basically because it was easier to do it this way, back when protocols for sockets were intertwined with IP protocols and domains were statically compiled in. Moving divert(4) out of inetsw accomplished two important things: 1) IPDIVERT is getting much closer to be not dependent on INET. This will be finalized in following changes. 2) Now divert socket no longer aliases with raw IPv4 socket. Domain/proto selection code won't need a hack for SOCK_RAW and multiple entries in inetsw implementing different flavors of raw socket can merge into one without requirement of raw IPv4 being the last member of dom_protosw. Differential revision: https://reviews.freebsd.org/D36379 |
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