Use getaddrinfo and getaddrinfo instead of gethostbyname2 in ping(8).

[hrs]

sbin/ping/ping.c

231

sock_in is a confusing name for struct addrinfo. How about just "ai" or "src_ai"?

948

Just before finish(), sock_in (or "ai" or "src_ai") should be safe to free.

if (source)
        freeaddrinfo(sock_in);

1442

Data structure which is pointed by whereto should be freed here.

freeaddrinfo(whereto);