1*21370Sdist /* 2*21370Sdist * Copyright (c) 1983 Regents of the University of California. 3*21370Sdist * All rights reserved. The Berkeley software License Agreement 4*21370Sdist * specifies the terms and conditions for redistribution. 5*21370Sdist */ 68362Ssam 7*21370Sdist #ifndef lint 8*21370Sdist static char sccsid[] = "@(#)inet_network.c 5.1 (Berkeley) 05/30/85"; 9*21370Sdist #endif not lint 10*21370Sdist 118362Ssam #include <sys/types.h> 128362Ssam #include <ctype.h> 138362Ssam 148362Ssam /* 158362Ssam * Internet network address interpretation routine. 168362Ssam * The library routines call this routine to interpret 178362Ssam * network numbers. 188362Ssam */ 198362Ssam u_long 208362Ssam inet_network(cp) 218362Ssam register char *cp; 228362Ssam { 238362Ssam register u_long val, base, n; 248362Ssam register char c; 258362Ssam u_long parts[4], *pp = parts; 268363Ssam register int i; 278362Ssam 288362Ssam again: 298362Ssam val = 0; base = 10; 308362Ssam if (*cp == '0') 318362Ssam base = 8, cp++; 328362Ssam if (*cp == 'x' || *cp == 'X') 338362Ssam base = 16, cp++; 348362Ssam while (c = *cp) { 358362Ssam if (isdigit(c)) { 368362Ssam val = (val * base) + (c - '0'); 378362Ssam cp++; 388362Ssam continue; 398362Ssam } 408362Ssam if (base == 16 && isxdigit(c)) { 418362Ssam val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); 428362Ssam cp++; 438362Ssam continue; 448362Ssam } 458362Ssam break; 468362Ssam } 478362Ssam if (*cp == '.') { 488362Ssam if (pp >= parts + 4) 498362Ssam return (-1); 508362Ssam *pp++ = val, cp++; 518362Ssam goto again; 528362Ssam } 538362Ssam if (*cp && !isspace(*cp)) 548362Ssam return (-1); 558362Ssam *pp++ = val; 568362Ssam n = pp - parts; 578362Ssam if (n > 4) 588362Ssam return (-1); 598362Ssam for (val = 0, i = 0; i < n; i++) { 608362Ssam val <<= 8; 618362Ssam val |= parts[i] & 0xff; 628362Ssam } 638362Ssam return (val); 648362Ssam } 65