121370Sdist /* 221370Sdist * Copyright (c) 1983 Regents of the University of California. 321370Sdist * All rights reserved. The Berkeley software License Agreement 421370Sdist * specifies the terms and conditions for redistribution. 521370Sdist */ 68362Ssam 726615Sdonn #if defined(LIBC_SCCS) && !defined(lint) 8*32315Sbostic static char sccsid[] = "@(#)inet_network.c 5.3 (Berkeley) 10/01/87"; 926615Sdonn #endif LIBC_SCCS and not lint 1021370Sdist 118362Ssam #include <sys/types.h> 12*32315Sbostic #include <netinet/in.h> 138362Ssam #include <ctype.h> 148362Ssam 158362Ssam /* 168362Ssam * Internet network address interpretation routine. 178362Ssam * The library routines call this routine to interpret 188362Ssam * network numbers. 198362Ssam */ 208362Ssam u_long 218362Ssam inet_network(cp) 228362Ssam register char *cp; 238362Ssam { 248362Ssam register u_long val, base, n; 258362Ssam register char c; 268362Ssam u_long parts[4], *pp = parts; 278363Ssam register int i; 288362Ssam 298362Ssam again: 308362Ssam val = 0; base = 10; 318362Ssam if (*cp == '0') 328362Ssam base = 8, cp++; 338362Ssam if (*cp == 'x' || *cp == 'X') 348362Ssam base = 16, cp++; 358362Ssam while (c = *cp) { 368362Ssam if (isdigit(c)) { 378362Ssam val = (val * base) + (c - '0'); 388362Ssam cp++; 398362Ssam continue; 408362Ssam } 418362Ssam if (base == 16 && isxdigit(c)) { 428362Ssam val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); 438362Ssam cp++; 448362Ssam continue; 458362Ssam } 468362Ssam break; 478362Ssam } 488362Ssam if (*cp == '.') { 498362Ssam if (pp >= parts + 4) 50*32315Sbostic return (INADDR_NONE); 518362Ssam *pp++ = val, cp++; 528362Ssam goto again; 538362Ssam } 548362Ssam if (*cp && !isspace(*cp)) 55*32315Sbostic return (INADDR_NONE); 568362Ssam *pp++ = val; 578362Ssam n = pp - parts; 588362Ssam if (n > 4) 59*32315Sbostic return (INADDR_NONE); 608362Ssam for (val = 0, i = 0; i < n; i++) { 618362Ssam val <<= 8; 628362Ssam val |= parts[i] & 0xff; 638362Ssam } 648362Ssam return (val); 658362Ssam } 66