diff options
Diffstat (limited to 'newlib/libc/sys/linux/net/ns_samedomain.c')
| -rw-r--r-- | newlib/libc/sys/linux/net/ns_samedomain.c | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/newlib/libc/sys/linux/net/ns_samedomain.c b/newlib/libc/sys/linux/net/ns_samedomain.c deleted file mode 100644 index 964863719..000000000 --- a/newlib/libc/sys/linux/net/ns_samedomain.c +++ /dev/null @@ -1,204 +0,0 @@ -/* - * Copyright (c) 1995,1999 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS - * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE - * CONSORTIUM 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) && !defined(lint) -static const char rcsid[] = "$BINDId: ns_samedomain.c,v 8.9 1999/10/15 21:06:51 vixie Exp $"; -#endif - -#include <sys/types.h> -#include <arpa/nameser.h> -#include <errno.h> -#include <string.h> - -#include "libc-symbols.h" - -/* - * int - * ns_samedomain(a, b) - * Check whether a name belongs to a domain. - * Inputs: - * a - the domain whose ancestory is being verified - * b - the potential ancestor we're checking against - * Return: - * boolean - is a at or below b? - * Notes: - * Trailing dots are first removed from name and domain. - * Always compare complete subdomains, not only whether the - * domain name is the trailing string of the given name. - * - * "host.foobar.top" lies in "foobar.top" and in "top" and in "" - * but NOT in "bar.top" - */ - -int -ns_samedomain(const char *a, const char *b) { - size_t la, lb; - int diff, i, escaped; - const char *cp; - - la = strlen(a); - lb = strlen(b); - - /* Ignore a trailing label separator (i.e. an unescaped dot) in 'a'. */ - if (la != 0 && a[la - 1] == '.') { - escaped = 0; - /* Note this loop doesn't get executed if la==1. */ - for (i = la - 2; i >= 0; i--) - if (a[i] == '\\') { - if (escaped) - escaped = 0; - else - escaped = 1; - } else - break; - if (!escaped) - la--; - } - - /* Ignore a trailing label separator (i.e. an unescaped dot) in 'b'. */ - if (lb != 0 && b[lb - 1] == '.') { - escaped = 0; - /* note this loop doesn't get executed if lb==1 */ - for (i = lb - 2; i >= 0; i--) - if (b[i] == '\\') { - if (escaped) - escaped = 0; - else - escaped = 1; - } else - break; - if (!escaped) - lb--; - } - - /* lb == 0 means 'b' is the root domain, so 'a' must be in 'b'. */ - if (lb == 0) - return (1); - - /* 'b' longer than 'a' means 'a' can't be in 'b'. */ - if (lb > la) - return (0); - - /* 'a' and 'b' being equal at this point indicates sameness. */ - if (lb == la) - return (strncasecmp(a, b, lb) == 0); - - /* Ok, we know la > lb. */ - - diff = la - lb; - - /* - * If 'a' is only 1 character longer than 'b', then it can't be - * a subdomain of 'b' (because of the need for the '.' label - * separator). - */ - if (diff < 2) - return (0); - - /* - * If the character before the last 'lb' characters of 'b' - * isn't '.', then it can't be a match (this lets us avoid - * having "foobar.com" match "bar.com"). - */ - if (a[diff - 1] != '.') - return (0); - - /* - * We're not sure about that '.', however. It could be escaped - * and thus not a really a label separator. - */ - escaped = 0; - for (i = diff - 2; i >= 0; i--) - if (a[i] == '\\') - if (escaped) - escaped = 0; - else - escaped = 1; - else - break; - if (escaped) - return (0); - - /* Now compare aligned trailing substring. */ - cp = a + diff; - return (strncasecmp(cp, b, lb) == 0); -} - -/* - * int - * ns_subdomain(a, b) - * is "a" a subdomain of "b"? - */ -int -ns_subdomain(const char *a, const char *b) { - return (ns_samename(a, b) != 1 && ns_samedomain(a, b)); -} - -/* - * int - * ns_makecanon(src, dst, dstsize) - * make a canonical copy of domain name "src" - * notes: - * foo -> foo. - * foo. -> foo. - * foo.. -> foo. - * foo\. -> foo\.. - * foo\\. -> foo\\. - */ - -int -ns_makecanon(const char *src, char *dst, size_t dstsize) { - size_t n = strlen(src); - - if (n + sizeof "." > dstsize) { - __set_errno (EMSGSIZE); - return (-1); - } - strcpy(dst, src); - while (n > 0 && dst[n - 1] == '.') /* Ends in "." */ - if (n > 1 && dst[n - 2] == '\\' && /* Ends in "\." */ - (n < 2 || dst[n - 3] != '\\')) /* But not "\\." */ - break; - else - dst[--n] = '\0'; - dst[n++] = '.'; - dst[n] = '\0'; - return (0); -} - -/* - * int - * ns_samename(a, b) - * determine whether domain name "a" is the same as domain name "b" - * return: - * -1 on error - * 0 if names differ - * 1 if names are the same - */ - -int -ns_samename(const char *a, const char *b) { - char ta[NS_MAXDNAME], tb[NS_MAXDNAME]; - - if (ns_makecanon(a, ta, sizeof ta) < 0 || - ns_makecanon(b, tb, sizeof tb) < 0) - return (-1); - if (strcasecmp(ta, tb) == 0) - return (1); - else - return (0); -} |