diff options
| author | Michael Stapelberg <michael@stapelberg.de> | 2012-09-29 00:08:56 +0200 |
|---|---|---|
| committer | Michael Stapelberg <michael@stapelberg.de> | 2012-09-29 00:08:56 +0200 |
| commit | 5c615f70749811acdb64a6821d8143c61d65a583 (patch) | |
| tree | ce755199d149d35805787fc4268ede345fc5947d /src/print_ipv6_addr.c | |
| parent | 59d52ad78759ef7b194f9ca50f9d03d721d14398 (diff) | |
Save the DNS lookup for K.root-servers.net (Thanks barfoos)
This avoids running into a timeout when there is no connectivity on
i3status startup.
Diffstat (limited to 'src/print_ipv6_addr.c')
| -rw-r--r-- | src/print_ipv6_addr.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/print_ipv6_addr.c b/src/print_ipv6_addr.c index abf4508..8b11e1f 100644 --- a/src/print_ipv6_addr.c +++ b/src/print_ipv6_addr.c @@ -78,10 +78,13 @@ static char *get_ipv6_addr(void) { 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 - * K root server is a pretty safe bet. */ - if (getaddrinfo("k.root-servers.net", "domain", &hints, &result) != 0) { + /* We use the public IPv6 of the K root server here. It doesn’t matter + * which IPv6 address we use (we don’t even send any packets), as long + * as it’s considered global by the kernel. + * NB: We don’t use a hostname since that would trigger a DNS lookup. + * By using an IPv6 address, getaddrinfo() will *not* do a DNS lookup, + * but return the address in the appropriate struct. */ + if (getaddrinfo("2001:7fd::1", "domain", &hints, &result) != 0) { /* We don’t display the error here because most * likely, there just is no connectivity. * Thus, don’t spam the user’s console. */ |