/* src/port/inet_aton.c * * This inet_aton() function was taken from the GNU C library and * incorporated into Postgres for those systems which do not have this * routine in their standard C libraries. * * The function was been extracted whole from the file inet_aton.c in * Release 5.3.12 of the Linux C library, which is derived from the * GNU C library, by Bryan Henderson in October 1996. The copyright * notice from that file is below. */ /* * Copyright (c) 1983, 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "c.h" #include #include #include "port/pg_bswap.h" /* * Check whether "cp" is a valid ascii representation * of an Internet address and convert to a binary address. * Returns 1 if the address is valid, 0 if not. * This replaces inet_addr, the return value from which * cannot distinguish between failure and a local broadcast address. */ int inet_aton(const char *cp, struct in_addr *addr) { unsigned int val; int base, n; char c; u_int parts[4]; u_int *pp = parts; for (;;) { /* * Collect number up to ``.''. Values are specified as for C: 0x=hex, * 0=octal, other=decimal. */ val = 0; base = 10; if (*cp == '0') { if (*++cp == 'x' || *cp == 'X') base = 16, cp++; else base = 8; } while ((c = *cp) != '\0') { if (isdigit((unsigned char) c)) { val = (val * base) + (c - '0'); cp++; continue; } if (base == 16 && isxdigit((unsigned char) c)) { val = (val << 4) + (c + 10 - (islower((unsigned char) c) ? 'a' : 'A')); cp++; continue; } break; } if (*cp == '.') { /* * Internet format: a.b.c.d a.b.c (with c treated as 16-bits) * a.b (with b treated as 24 bits) */ if (pp >= parts + 3 || val > 0xff) return 0; *pp++ = val, cp++; } else break; } /* * Check for trailing junk. */ while (*cp) if (!isspace((unsigned char) *cp++)) return 0; /* * Concoct the address according to the number of parts specified. */ n = pp - parts + 1; switch (n) { case 1: /* a -- 32 bits */ break; case 2: /* a.b -- 8.24 bits */ if (val > 0xffffff) return 0; val |= parts[0] << 24; break; case 3: /* a.b.c -- 8.8.16 bits */ if (val > 0xffff) return 0; val |= (parts[0] << 24) | (parts[1] << 16); break; case 4: /* a.b.c.d -- 8.8.8.8 bits */ if (val > 0xff) return 0; val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); break; } if (addr) addr->s_addr = pg_hton32(val); return 1; }