121370Sdist /* 221370Sdist * Copyright (c) 1983 Regents of the University of California. 333676Sbostic * All rights reserved. 433676Sbostic * 542626Sbostic * %sccs.include.redist.c% 621370Sdist */ 78362Ssam 826615Sdonn #if defined(LIBC_SCCS) && !defined(lint) 9*46604Sbostic static char sccsid[] = "@(#)inet_network.c 5.7 (Berkeley) 02/24/91"; 1033676Sbostic #endif /* LIBC_SCCS and not lint */ 1121370Sdist 128362Ssam #include <sys/types.h> 1332315Sbostic #include <netinet/in.h> 14*46604Sbostic #include <arpa/inet.h> 158362Ssam 168362Ssam /* 178362Ssam * Internet network address interpretation routine. 188362Ssam * The library routines call this routine to interpret 198362Ssam * network numbers. 208362Ssam */ 218362Ssam u_long 228362Ssam inet_network(cp) 23*46604Sbostic register const char *cp; 248362Ssam { 258362Ssam register u_long val, base, n; 268362Ssam register char c; 278362Ssam u_long parts[4], *pp = parts; 288363Ssam register int i; 298362Ssam 308362Ssam again: 318362Ssam val = 0; base = 10; 328362Ssam if (*cp == '0') 338362Ssam base = 8, cp++; 348362Ssam if (*cp == 'x' || *cp == 'X') 358362Ssam base = 16, cp++; 368362Ssam while (c = *cp) { 378362Ssam if (isdigit(c)) { 388362Ssam val = (val * base) + (c - '0'); 398362Ssam cp++; 408362Ssam continue; 418362Ssam } 428362Ssam if (base == 16 && isxdigit(c)) { 438362Ssam val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); 448362Ssam cp++; 458362Ssam continue; 468362Ssam } 478362Ssam break; 488362Ssam } 498362Ssam if (*cp == '.') { 508362Ssam if (pp >= parts + 4) 5132315Sbostic return (INADDR_NONE); 528362Ssam *pp++ = val, cp++; 538362Ssam goto again; 548362Ssam } 558362Ssam if (*cp && !isspace(*cp)) 5632315Sbostic return (INADDR_NONE); 578362Ssam *pp++ = val; 588362Ssam n = pp - parts; 598362Ssam if (n > 4) 6032315Sbostic return (INADDR_NONE); 618362Ssam for (val = 0, i = 0; i < n; i++) { 628362Ssam val <<= 8; 638362Ssam val |= parts[i] & 0xff; 648362Ssam } 658362Ssam return (val); 668362Ssam } 67