I prefer Jesper's other patch (the one that goes back to
code = PRC_UNREACH_PORT). Note that the comment here:
/*
* RFC 1122, Sections 3.2.2.1 and 4.2.3.9.
* Treat subcodes 2,3 as immediate RST
*/
case ICMP_UNREACH_PROTOCOL:
case ICMP_UNREACH_PORT:
code = PRC_UNREACH_ADMIN_PROHIB;
break;
3.2.2.1 says that ICMP errors must be passed to the transport layer,
and 4.2.3.9 is TCP-specific. To me, it's a more general solution to
give the transport layer more specific info (i.e. code = PRC_UNREACH_PORT)
and let it act appropriately (i.e. TCP treats PRC_UNREACH_PORT specially),
especially since TCP and UDP may want to report different things here.
Bill
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