Better interface detection? (was Re: krb5kdc crashes)

[Tom Yu]

>>>>> "cg2v" == Chaskiel M Grundman <cg2v at andrew.cmu.edu> writes:

cg2v> He's not talking about msg_control/msg_accrights, but msg_name,
cg2v> which irix 6.5 claims to support:

cg2v> "
cg2v>           struct msghdr {
cg2v>                caddr_t   msg_name; /* optional address */
cg2v>                int  msg_namelen;   /* size of address */

[...]

This is a strategy I've heard before (perhaps from Marc Horowitz?) ;
do a recvmsg() with MSG_PEEK to get the destination address, and then
do a recvfrom() to get the source address.  We may actually already be
doing it elsewhere in our code.

---Tom