/*- * SPDX-License-Identifier: ISC * * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1996-1999 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #if defined(LIBC_SCCS) && !defined(lint) static const char rcsid[] = "$Id: nsap_addr.c,v 1.5 2005/07/28 06:51:48 marka Exp $"; #endif /* LIBC_SCCS and not lint */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include "port_before.h" #include <sys/param.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <arpa/nameser.h> #include <ctype.h> #include <resolv.h> #include <resolv_mt.h> #include "port_after.h" static char xtob(int c) { return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); } u_int inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { u_char c, nib; u_int len = 0; if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X')) return (0); ascii += 2; while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { if (c == '.' || c == '+' || c == '/') continue; if (!isascii(c)) return (0); if (islower(c)) c = toupper(c); if (isxdigit(c)) { nib = xtob(c); c = *ascii++; if (c != '\0') { c = toupper(c); if (isxdigit(c)) { *binary++ = (nib << 4) | xtob(c); len++; } else return (0); } else return (0); } else return (0); } return (len); } char * inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { int nib; int i; char *tmpbuf = inet_nsap_ntoa_tmpbuf; char *start; if (ascii) start = ascii; else { ascii = tmpbuf; start = tmpbuf; } *ascii++ = '0'; *ascii++ = 'x'; if (binlen > 255) binlen = 255; for (i = 0; i < binlen; i++) { nib = *binary >> 4; *ascii++ = nib + (nib < 10 ? '0' : '7'); nib = *binary++ & 0x0f; *ascii++ = nib + (nib < 10 ? '0' : '7'); if (((i % 2) == 0 && (i + 1) < binlen)) *ascii++ = '.'; } *ascii = '\0'; return (start); } /* * Weak aliases for applications that use certain private entry points, * and fail to include <arpa/inet.h>. */ #undef inet_nsap_addr __weak_reference(__inet_nsap_addr, inet_nsap_addr); #undef inet_nsap_ntoa __weak_reference(__inet_nsap_ntoa, inet_nsap_ntoa); /*! \file */