IN_CLASSC_NSHIFT
addr = net << IN_CLASSC_NSHIFT;
addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
return ((i & IN_CLASSC_NET) >> IN_CLASSC_NSHIFT);
addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
limit = IN_CLASSC_NSHIFT;
a.s_addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT);
net1.s_addr = htonl(i << IN_CLASSC_NSHIFT);
net2.s_addr = htonl(i >> IN_CLASSC_NSHIFT);