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Allow hostnames in offline, online and burst commands

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This commit is contained in:
Miroslav Lichvar
2013-06-05 10:00:36 +02:00
parent 32bf32e7d5
commit 79811bf3e2
2 changed files with 22 additions and 5 deletions
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22
chrony.texi.in
View File

@@ -3227,6 +3227,7 @@ The syntax of the burst command is as follows
@example
burst <n-good-measurements>/<max-measurements> [<mask>/<masked-address>]
burst <n-good-measurements>/<max-measurements> [<masked-address>/<masked-bits>]
burst <n-good-measurements>/<max-measurements> [<address>]
@end example
The mask and masked-address arguments are optional, in which case
@@ -3259,6 +3260,10 @@ then the burst command is applied to that source.
This can be used with @code{masked-address} for CIDR notation, which is a
shorter alternative to the form with mask.
@item address
This is an IP address or a hostname. The burst command is applied only to that
source.
@end table
If no mask or masked address arguments are provided, every source will
@@ -3285,6 +3290,12 @@ In the first case, the two out of ten sampling will only be applied to
sources whose IPv4 addresses are of the form @code{1.2.x.y}, where x and y
are arbitrary. In the second case, the sampling will be applied to sources
whose IPv6 addresses have first 48 bits equal to @code{2001:db8:789a}.
Example of the three-argument form of the command is
@example
burst 2/10 foo.bar.com
@end example
@c }}}
@c {{{ clients
@node clients command
@@ -3815,15 +3826,17 @@ the @code{offline} command being used, @code{chronyd} would assume that the
source had failed and would attempt to pick another synchronisation
source.
There are three forms of the @code{offline} command. The first form is a
wildcard, meaning all sources. The second form allows a IP address mask
There are four forms of the @code{offline} command. The first form is a
wildcard, meaning all sources. The second form allows an IP address mask
and a masked address to be specified. The third form uses the CIDR
notation. These forms are illustrated below.
notation. The fourth form uses an IP address or a hostname. These forms are
illustrated below.
@example
offline
offline 255.255.255.0/1.2.3.0
offline 2001:db8:789a::/48
offline foo.bar.com
@end example
The second form means that the @code{offline} command is to be applied
@@ -3831,7 +3844,8 @@ to any source whose IPv4 address is in the @code{1.2.3} subnet. (The host's
address is logically and-ed with the mask, and if the result matches the
masked-address the host is processed). The third form means that the
command is to be applied to all sources whose IPv6 addresses have first
48 bits equal to @code{2001:db8:789a}.
48 bits equal to @code{2001:db8:789a}. The fourth form means that the command
is to be applied only to that one source.
The wildcard form of the address is actually equivalent to

5
client.c
View File

@@ -256,9 +256,12 @@ read_mask_address(char *line, IPAddr *mask, IPAddr *address)
}
}
} else {
if (UTI_StringToIP(p, address)) {
if (DNS_Name2IPAddress(p, address) == DNS_Success) {
bits_to_mask(-1, address->family, mask);
return 1;
} else {
fprintf(stderr, "Could not get address for hostname\n");
return 0;
}
}
}