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| author | Michael Stapelberg <michael@stapelberg.de> | 2011-01-03 15:00:42 +0100 |
|---|---|---|
| committer | Michael Stapelberg <michael@stapelberg.de> | 2011-01-03 15:00:42 +0100 |
| commit | 39feebea4d3a4cd05ea264202f8523202190f43f (patch) | |
| tree | d8cc8bb6495f0aabd54cbe0e4b292794e9639b8e | |
| parent | cf091024335052e4774d44179e80e1948da8610f (diff) | |
Cache the result of the DNS query also if there is no IPv6 connectivity (Thanks dothebart)
| -rw-r--r-- | src/print_ipv6_addr.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/print_ipv6_addr.c b/src/print_ipv6_addr.c index b370011..e96c0d3 100644 --- a/src/print_ipv6_addr.c +++ b/src/print_ipv6_addr.c @@ -70,6 +70,7 @@ static char *get_ipv6_addr() { memset(&hints, 0, sizeof(struct addrinfo)); hints.ai_family = AF_INET6; + hints.ai_socktype = SOCK_DGRAM; /* We resolve the K root server to get a public IPv6 address. You can * replace this with any other host which has an AAAA record, but the @@ -83,7 +84,11 @@ static char *get_ipv6_addr() { for (resp = result; resp != NULL; resp = resp->ai_next) { char *addr_string = get_sockname(resp); - if (!addr_string) + /* If we could not get our own address and there is more than + * one result for resolving k.root-servers.net, we cannot + * cache. Otherwise, no matter if we got IPv6 connectivity or + * not, we will cache the (single) result and are done. */ + if (!addr_string && result->ai_next != NULL) continue; if ((cached = malloc(sizeof(struct addrinfo))) == NULL) |