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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2020-05-17 18:07:58 +0000 |
|---|---|---|
| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2020-05-17 18:07:58 +0000 |
| commit | 91e808f1db0b76f3625f516ec73a95b4e32decb2 (patch) | |
| tree | cacbb0f21daa96bffa4a74c8395c82983b185be5 /doc/s6-dnsip.html | |
| parent | 8e3663ba249b572af9332f2762f29ba514620a27 (diff) | |
| download | s6-dns-91e808f1db0b76f3625f516ec73a95b4e32decb2.tar.xz | |
Add s6-dnsip, prepare for 2.3.3.0, fix resolvenoq_aaaaa
TODO: resolveq_aaaaa returns the best (1 answer) whereas we
want both ip6 and ip4 when available. It works with noq, it
should work with q too.
Diffstat (limited to 'doc/s6-dnsip.html')
| -rw-r--r-- | doc/s6-dnsip.html | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/doc/s6-dnsip.html b/doc/s6-dnsip.html new file mode 100644 index 0000000..47c4970 --- /dev/null +++ b/doc/s6-dnsip.html @@ -0,0 +1,72 @@ +<html> + <head> + <meta name="viewport" content="width=device-width, initial-scale=1.0" /> + <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> + <meta http-equiv="Content-Language" content="en" /> + <title>s6-dns: the s6-dnsip program</title> + <meta name="Description" content="s6-dns: the s6-dnsip program" /> + <meta name="Keywords" content="s6-dns client s6-dnsip dnsip s6-dnsip6 s6-dnsip4 domain name ip address ipv6 ipv4" /> + <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> --> + </head> +<body> + +<p> +<a href="index.html">s6-dns</a><br /> +<a href="//skarnet.org/software/">Software</a><br /> +<a href="//skarnet.org/">skarnet.org</a> +</p> + +<h1> The s6-dnsip program </h1> + +<p> + s6-dnsip finds both the IPv6 and IPv4 addresses associated to a domain name. +</p> + +<h2> Interface </h2> + +<pre> + s6-dnsip [ -q ] [ -r ] [ -t <em>timeout</em> ] <em>domain</em> +</pre> + +<ul> + <li> s6-dnsip makes both an A and an AAAA query for the name <em>domain</em>, +in parallel. It waits for the results and prints the obtained addresses, +one per line, then exits 0. </li> + <li> If the domain exists but no relevant field has been found, it exits 1. </li> + <li> If the DNS answered but no answer is available, it prints a relevant +error message and exits 2. </li> + <li> By default, s6-dnsip looks for DNS cache addresses in the +<tt>/etc/resolv.conf</tt> file. If the DNSCACHEIP environment variable is set +and contains a list of IP (v4 or v6) addresses, separated by commas, +semicolons, spaces, tabs, newlines or carriage returns, then this list +is used instead. </li> +</ul> + +<h2> Options </h2> + +<ul> + <li> <tt>-q</tt> : qualify. Qualifies <em>domain</em> before resolution, +according to suffixes found in <tt>/etc/resolv.conf</tt>. If the DNSQUALIFY +environment variable is set and contains a list of suffixes separated by spaces, +tabs, newlines or carriage returns, then this list is used instead. By +default, no qualification is used: if <em>domain</em> is not a FQDN, a dot +is just appended to it. </li> + <li> <tt>-r</tt> : random. By default, the program does not sort the +result, but prints them in the order received from the DNS. With this +option, it performs a random permutation on the results before printing +them. </li> + <li> <tt>-t</tt> <em>timeout</em> : if the resolution takes more +than <em>timeout</em> milliseconds, then it exits 99 right away with an error +message. By default, <em>timeout</em> is 0, which means no timeout. </li> +</ul> + +<h2> Notes </h2> + +<p> +Even if the underlying skalibs has been compiled without IPv6 support, +or IPv6 DNS transport is unavailable for any reason, s6-dnsip will still +return IPv6 addresses if the AAAA query has a positive result. +</p> + +</body> +</html> |