diff options
Diffstat (limited to 'crypto/heimdal/lib/roken/getnameinfo_verified.c')
| -rw-r--r-- | crypto/heimdal/lib/roken/getnameinfo_verified.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/crypto/heimdal/lib/roken/getnameinfo_verified.c b/crypto/heimdal/lib/roken/getnameinfo_verified.c index de3c8bf..0145262 100644 --- a/crypto/heimdal/lib/roken/getnameinfo_verified.c +++ b/crypto/heimdal/lib/roken/getnameinfo_verified.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 1999 - 2001 Kungliga Tekniska Högskolan + * Copyright (c) 1999 - 2002 Kungliga Tekniska Högskolan * (Royal Institute of Technology, Stockholm, Sweden). * All rights reserved. * @@ -33,11 +33,19 @@ #ifdef HAVE_CONFIG_H #include <config.h> -RCSID("$Id: getnameinfo_verified.c,v 1.5 2001/02/12 13:55:07 assar Exp $"); +RCSID("$Id: getnameinfo_verified.c,v 1.6 2002/09/05 01:36:27 assar Exp $"); #endif #include "roken.h" +/* + * Try to obtain a verified name for the address in `sa, salen' (much + * similar to getnameinfo). + * Verified in this context means that forwards and backwards lookups + * in DNS are consistent. If that fails, return an error if the + * NI_NAMEREQD flag is set or return the numeric address as a string. + */ + int getnameinfo_verified(const struct sockaddr *sa, socklen_t salen, char *host, size_t hostlen, @@ -60,13 +68,13 @@ getnameinfo_verified(const struct sockaddr *sa, socklen_t salen, ret = getnameinfo (sa, salen, host, hostlen, serv, servlen, flags | NI_NUMERICSERV); if (ret) - return ret; + goto fail; memset (&hints, 0, sizeof(hints)); hints.ai_socktype = SOCK_STREAM; ret = getaddrinfo (host, serv, &hints, &ai); if (ret) - return ret; + goto fail; for (a = ai; a != NULL; a = a->ai_next) { if (a->ai_addrlen == salen && memcmp (a->ai_addr, sa, salen) == 0) { @@ -75,6 +83,7 @@ getnameinfo_verified(const struct sockaddr *sa, socklen_t salen, } } freeaddrinfo (ai); + fail: if (flags & NI_NAMEREQD) return EAI_NONAME; ret = getnameinfo (sa, salen, host, hostlen, serv, servlen, |
