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net: add get_reachable_networks

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will be used for the issue banner generators and for some "get
nodeip" calls as fallback for get_ip_from_hostname, which tends to
fail in our CT envs (e.g., PMG)

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This commit is contained in:
Thomas Lamprecht 2021-09-17 16:25:51 +02:00
parent 29dde5f46b
commit d7cafe5124
1 changed files with 32 additions and 0 deletions
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32
src/PVE/Network.pm
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@ -9,6 +9,7 @@ use PVE::Tools qw(run_command lock_file);
use File::Basename;
use IO::Socket::IP;
use JSON;
use Net::IP;
use NetAddr::IP qw(:lower);
use POSIX qw(ECONNREFUSED);
@ -600,6 +601,37 @@ sub is_ip_in_cidr {
return $overlap == $Net::IP::IP_B_IN_A_OVERLAP || $overlap == $Net::IP::IP_IDENTICAL;
}
# get all currently configured addresses that have a global scope, i.e., are reachable from the
# outside of the host and thus are neither loopback nor link-local ones
# returns an array ref of: { addr => "IP", cidr => "IP/PREFIXLEN", family => "inet|inet6" }
sub get_reachable_networks {
my $raw = '';
run_command([qw(ip -j addr show up scope global)], outfunc => sub { $raw .= shift });
my $addrs = decode_json($raw);
# sort by family (IPv4/IPv6) and then by addr, just for some stability
my $addrs_sorter = sub {
my ($a, $b) = @_;
my $family = $a->{family} cmp $b->{family};
return $family if $family != 0;
return $a->{local} cmp $b->{local};
};
my $res = [];
for my $addr ($addrs->@*) {
next if !exists $addr->{addr_info};
next if grep { $_ eq 'LOOPBACK' } $addr->{flags}->@*;
for my $info (sort $addrs_sorter grep { $_ && $_->{local}} $addr->{addr_info}->@*) {
push $res->@*, {
addr => $info->{local},
cidr => "$info->{local}/$info->{prefixlen}",
family => $info->{family},
};
}
}
return $res;
}
sub get_local_ip_from_cidr {
my ($cidr) = @_;