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Add dns command to configure DNS resolving in chronyc

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This commit is contained in:
Miroslav Lichvar 2009-12-05 13:25:56 +01:00
parent 49bd8cfab3
commit 00a77fca52
2 changed files with 55 additions and 0 deletions
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30
chrony.texi
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@ -2544,6 +2544,8 @@ This option allows the user to specify the UDP port number which the
target @code{chronyd} is using for its command & monitoring connections.
This defaults to the compiled-in default; there would rarely be a need
to change this.
@item -n
This option disables resolving IP addresses to hostnames.
@item -4
With this option hostnames will be resolved only to IPv4 addresses.
@item -6
@ -2584,6 +2586,7 @@ Only the following commands can be used @emph{without} providing a
password:
@itemize @bullet
@item @code{dns}
@item @code{exit}
@item @code{help}
@item @code{password}
@ -2623,6 +2626,7 @@ interface.
* delete command:: Remove an NTP server or peer
* deny command :: Denying NTP client access
* deny all command:: Denying NTP client access
* dns command:: Configure how are hostnames and IP addresses resolved
* dump command:: Dump measurement histories to files
* exit command:: Exit from chronyc
* help command:: Generate help summary
@ -2983,6 +2987,32 @@ deny
The effect of the allow command is identical to the @code{deny all}
directive in the configuration file (@pxref{deny directive}).
@c }}}
@c {{{ dns
@node dns command
@subsubsection dns
The @code{dns} command configures how are hostnames and IP addresses resolved in
@code{chronyc}. IP addresses can be resolved to hostnames when printing results
of @code{sources}, @code{sourcestats}, @code{tracking} and @code{clients}
commands. Hostnames are resolved in commands that take an address as argument.
There are five forms of the command:
@table @code
@item dns -n
Disables resolving IP addresses to hostnames. Raw IP addresses will be
displayed.
@item dns +n
Enables resolving IP addresses to hostnames. This is the default unless
@code{chronyc} was started with @code{-n} option.
@item dns -4
Resolves hostnames only to IPv4 addresses.
@item dns -6
Resolves hostnames only to IPv6 addresses.
@item dns -46
Resolves hostnames to both address families. This is the default unless
@code{chronyc} was started with @code{-4} or @code{-6} option.
@end table
@c }}}
@c {{{ dump
@node dump command
@subsubsection dump

25
client.c
View file

@ -2238,6 +2238,28 @@ process_cmd_activity(const char *line)
/* ================================================== */
static int
process_cmd_dns(const char *line)
{
if (!strncmp(line, "-46", 3)) {
DNS_SetAddressFamily(IPADDR_UNSPEC);
} else if (!strncmp(line, "-4", 2)) {
DNS_SetAddressFamily(IPADDR_INET4);
} else if (!strncmp(line, "-6", 2)) {
DNS_SetAddressFamily(IPADDR_INET6);
} else if (!strncmp(line, "-n", 2)) {
no_dns = 1;
} else if (!strncmp(line, "+n", 2)) {
no_dns = 0;
} else {
fprintf(stderr, "Unrecognized dns command\n");
return 0;
}
return 1;
}
/* ================================================== */
static int
process_line(char *line, int *quit)
{
@ -2351,6 +2373,9 @@ process_line(char *line, int *quit)
} else if (!strncmp(p, "activity", 8)) {
ret = process_cmd_activity(p+8);
do_normal_submit = 0;
} else if (!strncmp(p, "dns ", 4)) {
ret = process_cmd_dns(p+4);
do_normal_submit = 0;
} else if (!strncmp(p, "help", 4)) {
do_normal_submit = 0;
give_help();