Honor the TTL value of SRV record lookups

Add new resolv_hostent data structure and utility functions

Resolve hosts by name from files into resolv_hostent

Resolve hosts by name from DNS into resolv_hostent

Switch resolver to using resolv_hostent and honor TTL

Conflicts:

	src/providers/fail_over.c

Provide TTL structure names for c-ares < 1.7

https://fedorahosted.org/sssd/ticket/898

In c-ares 1.7, the upstream renamed the addrttl/addr6ttl structures to
ares_addrttl/ares_addr6ttl so they are in the ares_ namespace.

Because they are committed to stable ABI, the contents are the same, just
the name changed -- so it is safe to just #define the new name for older
c-ares version in case the new one is not detected in configure time.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/tests/fail_over-tests.c b/src/tests/fail_over-tests.c
index a96549dc..84016dd9 100644
--- a/src/tests/fail_over-tests.c
+++ b/src/tests/fail_over-tests.c
@@ -147,7 +147,7 @@ test_resolve_service_callback(struct tevent_req *req)
     int port;
     struct task *task;
     struct fo_server *server = NULL;
-    struct hostent *he;
+    struct resolv_hostent *he;
     int i;
 
     task = tevent_req_callback_data(req, struct task);
@@ -172,10 +172,10 @@ test_resolve_service_callback(struct tevent_req *req)
 
     he = fo_get_server_hostent(server);
     fail_if(he == NULL, "%s: fo_get_server_hostent() returned NULL");
-    for (i = 0; he->h_addr_list[i]; i++) {
+    for (i = 0; he->addr_list[i]; i++) {
         char buf[256];
 
-        inet_ntop(he->h_addrtype, he->h_addr_list[i], buf, sizeof(buf));
+        inet_ntop(he->family, he->addr_list[i]->ipaddr, buf, sizeof(buf));
         fail_if(strcmp(buf, "127.0.0.1") != 0 && strcmp(buf, "::1") != 0);
     }