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Cache the result of the DNS query also if there is no IPv6 connectivity (Thanks dothebart)

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This commit is contained in:
Michael Stapelberg 2011-01-03 15:00:42 +01:00
parent cf09102433
commit 39feebea4d
1 changed files with 6 additions and 1 deletions
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7
src/print_ipv6_addr.c
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@ -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)