1*8358Ssam /* inet_lnaof.c 4.1 82/10/07 */ 2*8358Ssam 3*8358Ssam #include <sys/types.h> 4*8358Ssam #include <net/in.h> 5*8358Ssam 6*8358Ssam /* 7*8358Ssam * Return the local network address portion of an 8*8358Ssam * internet address; handles class a/b/c network 9*8358Ssam * number formats. 10*8358Ssam */ 11*8358Ssam in_lnaof(in) 12*8358Ssam struct in_addr in; 13*8358Ssam { 14*8358Ssam #if vax || pdp11 15*8358Ssam #define IN_LNAOF(in) \ 16*8358Ssam (((in).s_addr&IN_CLASSA) == 0 ? (in).s_addr&IN_CLASSA_LNA : \ 17*8358Ssam ((in).s_addr&IN_CLASSB) == 0 ? (in).s_addr&IN_CLASSB_LNA : \ 18*8358Ssam (in).s_addr&IN_CLASSC_LNA) 19*8358Ssam return ((int)htonl((u_long)IN_LNAOF(in))); 20*8358Ssam #else 21*8358Ssam return (IN_LNAOF(in)); 22*8358Ssam #endif 23*8358Ssam } 24