diff options
Diffstat (limited to 'resolv/ns_samedomain.c')
| -rw-r--r-- | resolv/ns_samedomain.c | 65 |
1 files changed, 35 insertions, 30 deletions
diff --git a/resolv/ns_samedomain.c b/resolv/ns_samedomain.c index 1fb1c552d0..44b843a74b 100644 --- a/resolv/ns_samedomain.c +++ b/resolv/ns_samedomain.c @@ -1,4 +1,5 @@ /* + * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1995,1999 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any @@ -24,21 +25,22 @@ static const char rcsid[] = "$BINDId: ns_samedomain.c,v 8.9 1999/10/15 21:06:51 #include <errno.h> #include <string.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 + *\li a - the domain whose ancestory is being verified + *\li b - the potential ancestor we're checking against + * * Return: - * boolean - is a at or below b? + *\li boolean - is a at or below b? + * * Notes: - * Trailing dots are first removed from name and domain. + *\li 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 "" + *\li "host.foobar.top" lies in "foobar.top" and in "top" and in "" * but NOT in "bar.top" */ @@ -52,7 +54,7 @@ ns_samedomain(const char *a, const char *b) { lb = strlen(b); /* Ignore a trailing label separator (i.e. an unescaped dot) in 'a'. */ - if (la != 0 && a[la - 1] == '.') { + if (la != 0U && a[la - 1] == '.') { escaped = 0; /* Note this loop doesn't get executed if la==1. */ for (i = la - 2; i >= 0; i--) @@ -68,7 +70,7 @@ ns_samedomain(const char *a, const char *b) { } /* Ignore a trailing label separator (i.e. an unescaped dot) in 'b'. */ - if (lb != 0 && b[lb - 1] == '.') { + if (lb != 0U && b[lb - 1] == '.') { escaped = 0; /* note this loop doesn't get executed if lb==1 */ for (i = lb - 2; i >= 0; i--) @@ -84,7 +86,7 @@ ns_samedomain(const char *a, const char *b) { } /* lb == 0 means 'b' is the root domain, so 'a' must be in 'b'. */ - if (lb == 0) + if (lb == 0U) return (1); /* 'b' longer than 'a' means 'a' can't be in 'b'. */ @@ -121,24 +123,23 @@ ns_samedomain(const char *a, const char *b) { */ escaped = 0; for (i = diff - 2; i >= 0; i--) - if (a[i] == '\\') + if (a[i] == '\\') { if (escaped) escaped = 0; else escaped = 1; - else + } else break; if (escaped) return (0); - + /* Now compare aligned trailing substring. */ cp = a + diff; return (strncasecmp(cp, b, lb) == 0); } +libresolv_hidden_def (ns_samedomain) -/* - * int - * ns_subdomain(a, b) +/*% * is "a" a subdomain of "b"? */ int @@ -146,30 +147,31 @@ 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: + * \code * foo -> foo. * foo. -> foo. * foo.. -> foo. * foo\. -> foo\.. * foo\\. -> foo\\. + * \endcode */ int ns_makecanon(const char *src, char *dst, size_t dstsize) { size_t n = strlen(src); - if (n + sizeof "." > dstsize) { + if (n + sizeof "." > dstsize) { /*%< Note: sizeof == 2 */ __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 "\\." */ + while (n >= 1U && dst[n - 1] == '.') /*%< Ends in "." */ + if (n >= 2U && dst[n - 2] == '\\' && /*%< Ends in "\." */ + (n < 3U || dst[n - 3] != '\\')) /*%< But not "\\." */ break; else dst[--n] = '\0'; @@ -177,15 +179,15 @@ ns_makecanon(const char *src, char *dst, size_t dstsize) { dst[n] = '\0'; return (0); } +libresolv_hidden_def (ns_makecanon) -/* - * 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 + *\li -1 on error + *\li 0 if names differ + *\li 1 if names are the same */ int @@ -200,3 +202,6 @@ ns_samename(const char *a, const char *b) { else return (0); } +libresolv_hidden_def (ns_samename) + +/*! \file */ |