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resolved: never cache RRs originating from localhost

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After all, this is likely a local DNS forwarder that caches anyway,
hence there's no point in caching twice.

Fixes #2038.
This commit is contained in:
Lennart Poettering
2015-11-27 00:46:51 +01:00
parent 452b4e327d
commit d830ebbdf6
4 changed files with 25 additions and 2 deletions
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src/basic/in-addr-util.c
+14 -1
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@@ -44,7 +44,7 @@ int in_addr_is_link_local(int family, const union in_addr_union *u) {
assert(u);
if (family == AF_INET)
return (be32toh(u->in.s_addr) & 0xFFFF0000) == (169U << 24 | 254U << 16);
return (be32toh(u->in.s_addr) & UINT32_C(0xFFFF0000)) == (UINT32_C(169) << 24 | UINT32_C(254) << 16);
if (family == AF_INET6)
return IN6_IS_ADDR_LINKLOCAL(&u->in6);
@@ -52,6 +52,19 @@ int in_addr_is_link_local(int family, const union in_addr_union *u) {
return -EAFNOSUPPORT;
}
int in_addr_is_localhost(int family, const union in_addr_union *u) {
assert(u);
if (family == AF_INET)
/* All of 127.x.x.x is localhost. */
return (be32toh(u->in.s_addr) & UINT32_C(0xFF000000)) == UINT32_C(127) << 24;
if (family == AF_INET)
return IN6_IS_ADDR_LOOPBACK(&u->in6);
return -EAFNOSUPPORT;
}
int in_addr_equal(int family, const union in_addr_union *a, const union in_addr_union *b) {
assert(a);
assert(b);