diff options
Diffstat (limited to 'resolv/nss_dns/dns-host.c')
| -rw-r--r-- | resolv/nss_dns/dns-host.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c index 3b287b717a..ba83c440cc 100644 --- a/resolv/nss_dns/dns-host.c +++ b/resolv/nss_dns/dns-host.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1996-2004, 2007-2009, 2010, 2012 Free Software Foundation, Inc. +/* Copyright (C) 1996-2004, 2007-2010, 2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996. @@ -744,6 +744,10 @@ getanswer_r (const querybuf *answer, int anslen, const char *qname, int qtype, if ((qtype == T_A || qtype == T_AAAA) && type == T_CNAME) { + /* A CNAME could also have a TTL entry. */ + if (ttlp != NULL && ttl < *ttlp) + *ttlp = ttl; + if (ap >= &host_data->aliases[MAX_NR_ALIASES - 1]) continue; n = dn_expand (answer->buf, end_of_message, cp, tbuf, sizeof tbuf); @@ -905,7 +909,10 @@ getanswer_r (const querybuf *answer, int anslen, const char *qname, int qtype, { register int nn; - if (ttlp != NULL) + /* We compose a single hostent out of the entire chain of + entries, so the TTL of the hostent is essentially the lowest + TTL in the chain. */ + if (ttlp != NULL && ttl < *ttlp) *ttlp = ttl; if (canonp != NULL) *canonp = bp; @@ -1081,6 +1088,11 @@ gaih_getanswer_slice (const querybuf *answer, int anslen, const char *qname, if (type == T_CNAME) { char tbuf[MAXDNAME]; + + /* A CNAME could also have a TTL entry. */ + if (ttlp != NULL && ttl < *ttlp) + *ttlp = ttl; + n = dn_expand (answer->buf, end_of_message, cp, tbuf, sizeof tbuf); if (__builtin_expect (n < 0 || res_hnok (tbuf) == 0, 0)) { @@ -1161,7 +1173,10 @@ gaih_getanswer_slice (const querybuf *answer, int anslen, const char *qname, if (*firstp) { - if (ttlp != NULL) + /* We compose a single hostent out of the entire chain of + entries, so the TTL of the hostent is essentially the lowest + TTL in the chain. */ + if (ttlp != NULL && ttl < *ttlp) *ttlp = ttl; (*pat)->name = canon ?: h_name; |