FreeBSD src
926f037af9
- Don't dereference a NULL hostent pointer (if T_PTR lookup fails). - Today I asked myself: "Self, you wrote this nifty async resolver that does a great job handling delayed replies to clients using the UDP transport, and the yplib code in libc always uses UDP (except for yp_all()). But what if some dork makes a DNS lookup using TCP?" Being the only dork on hand at the time, I tried it and was enlightened. As I suspected, my transaction ID frobbing hacks cause fireworks if called on a TCP transport handle (duh: the structures are different). Fix: check the type of socket in xprt->xp_sock using getsockopt() and don't use svcudp_get_xid() and svcudp_set_xid() for anything except SOCK_DGRAM sockets. (Since accept() gives you a new socket for each connection, the transaction ID munging isn't needed for TCP anyway.) |
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