1*11564Ssam /* in_local.h 4.2 83/03/13 */ 211562Ssam 311562Ssam /* 411562Ssam * Internet definitions and variables 511562Ssam * specific to installation at Berkeley. 611562Ssam */ 711562Ssam 811562Ssam /* 911562Ssam * Local subnetwork address mapping. 1011562Ssam * The standard scheme is: 1111562Ssam * internet address = network.local-part 1211562Ssam * where 1311562Ssam * network is between 8 and 34 bits 1411562Ssam * local-part is between 8 and 24 bits 1511562Ssam * 1611562Ssam * This is modified by interpreting network as 32 bits 1711562Ssam * and local-part as something between 8 and 23 bits 1811562Ssam * depending on the high bit in the local-part. When 1911562Ssam * the high bit in the local-part is a 1, the upper byte 2011562Ssam * is interpreted as a local network extension, and used 2111562Ssam * as the high byte in the network (extending it to 32 bits). 2211562Ssam * The additional 8 bits of network number are administered 2311562Ssam * locally and are not visible outside Berkeley, since 2411562Ssam * they're part of the local-part. 2511562Ssam */ 2611562Ssam /* network mappings */ 2711562Ssam #define CLASSA_LOCALNETMAP(n, in) \ 2811562Ssam (in) & 0x800000 ? (n) | (((in) & 0xef0000) << 8) : (n) 2911562Ssam #define CLASSB_LOCALNETMAP(n, in) \ 3011562Ssam (in) & 0x8000 ? (n) | (((in) & 0xef00) << 16) : (n) 3111562Ssam #define CLASSC_LOCALNETMAP(n, in) (n) 3211562Ssam 3311562Ssam /* local-part mappings */ 3411562Ssam #define CLASSA_LOCALHOSTMAP(h, in) \ 3511562Ssam (in) & 0x800000 ? (h) & ~0xef0000 : (h) 3611562Ssam #define CLASSB_LOCALHOSTMAP(h, in) \ 37*11564Ssam (in) & 0x8000 ? (h) & ~0xef00 : (h) 3811562Ssam #define CLASSC_LOCALHOSTMAP(h, in) (h) 39