diff options
author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-09-14 18:33:57 -0400 |
---|---|---|
committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-09-14 18:33:57 -0400 |
commit | 3c72c8d3ee67388336aca58c5afa3fb93a9c24c0 (patch) | |
tree | d072df7fee0f5906fad88c08398b2fe887cbc064 /src/grp-resolve/systemd-resolved/resolved-dns-cache.c | |
parent | e51613a3291342c6006edda8783755fb8994fd75 (diff) | |
parent | 6ba6ca19507add38549e07058c57489a8cd98cd1 (diff) |
Merge branch 'notsystemd/postmove' into notsystemd/master
# Conflicts:
# src/grp-journal/systemd-journald/Makefile
# src/grp-login/systemd-logind/Makefile
# src/grp-machine/grp-import/systemd-export/Makefile
# src/grp-machine/grp-import/systemd-import/Makefile
# src/grp-machine/grp-import/systemd-pull/Makefile
# src/grp-machine/systemd-machined/Makefile
# src/grp-network/libnetworkd-core/Makefile
# src/grp-resolve/libbasic-dns/Makefile
# src/grp-resolve/systemd-resolved/Makefile
# src/grp-utils/systemd-path/Makefile
# src/libshared/src/Makefile
# src/libsystemd-network/include/systemd-network/sd-ndisc.h
# src/libsystemd/Makefile
# src/libsystemd/src/test.mk
# src/libudev/Makefile
# src/systemd-dbus1-generator/Makefile
# src/systemd-nspawn/nspawn.c
Signed-off-by: Luke Shumaker <lukeshu@sbcglobal.net>
Diffstat (limited to 'src/grp-resolve/systemd-resolved/resolved-dns-cache.c')
-rw-r--r-- | src/grp-resolve/systemd-resolved/resolved-dns-cache.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/src/grp-resolve/systemd-resolved/resolved-dns-cache.c b/src/grp-resolve/systemd-resolved/resolved-dns-cache.c index 33e0582d98..690ed6f0c1 100644 --- a/src/grp-resolve/systemd-resolved/resolved-dns-cache.c +++ b/src/grp-resolve/systemd-resolved/resolved-dns-cache.c @@ -625,6 +625,12 @@ int dns_cache_put( dns_cache_remove_previous(c, key, answer); + /* We only care for positive replies and NXDOMAINs, on all + * other replies we will simply flush the respective entries, + * and that's it */ + if (!IN_SET(rcode, DNS_RCODE_SUCCESS, DNS_RCODE_NXDOMAIN)) + return 0; + if (dns_answer_size(answer) <= 0) { char key_str[DNS_RESOURCE_KEY_STRING_MAX]; @@ -633,12 +639,6 @@ int dns_cache_put( return 0; } - /* We only care for positive replies and NXDOMAINs, on all - * other replies we will simply flush the respective entries, - * and that's it */ - if (!IN_SET(rcode, DNS_RCODE_SUCCESS, DNS_RCODE_NXDOMAIN)) - return 0; - cache_keys = dns_answer_size(answer); if (key) cache_keys++; @@ -692,7 +692,7 @@ int dns_cache_put( return 0; /* See https://tools.ietf.org/html/rfc2308, which say that a - * matching SOA record in the packet is used to to enable + * matching SOA record in the packet is used to enable * negative caching. */ r = dns_answer_find_soa(answer, key, &soa, &flags); if (r < 0) @@ -791,7 +791,7 @@ static DnsCacheItem *dns_cache_get_by_key_follow_cname_dname_nsec(DnsCache *c, D return NULL; } -int dns_cache_lookup(DnsCache *c, DnsResourceKey *key, int *rcode, DnsAnswer **ret, bool *authenticated) { +int dns_cache_lookup(DnsCache *c, DnsResourceKey *key, bool clamp_ttl, int *rcode, DnsAnswer **ret, bool *authenticated) { _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL; char key_str[DNS_RESOURCE_KEY_STRING_MAX]; unsigned n = 0; @@ -799,6 +799,7 @@ int dns_cache_lookup(DnsCache *c, DnsResourceKey *key, int *rcode, DnsAnswer **r bool nxdomain = false; DnsCacheItem *j, *first, *nsec = NULL; bool have_authenticated = false, have_non_authenticated = false; + usec_t current; assert(c); assert(key); @@ -893,11 +894,24 @@ int dns_cache_lookup(DnsCache *c, DnsResourceKey *key, int *rcode, DnsAnswer **r if (!answer) return -ENOMEM; + if (clamp_ttl) + current = now(clock_boottime_or_monotonic()); + LIST_FOREACH(by_key, j, first) { + _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; + if (!j->rr) continue; - r = dns_answer_add(answer, j->rr, j->ifindex, j->authenticated ? DNS_ANSWER_AUTHENTICATED : 0); + if (clamp_ttl) { + rr = dns_resource_record_ref(j->rr); + + r = dns_resource_record_clamp_ttl(&rr, LESS_BY(j->until, current) / USEC_PER_SEC); + if (r < 0) + return r; + } + + r = dns_answer_add(answer, rr ?: j->rr, j->ifindex, j->authenticated ? DNS_ANSWER_AUTHENTICATED : 0); if (r < 0) return r; } |