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From: Stoiko Ivanov <s.ivanov@proxmox.com>
To: pve-devel@lists.proxmox.com
Date: Tue, 4 May 2021 19:00:26 +0200
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Subject: [pve-devel] [PATCH common v2 2/2] daemon: explicitly bind to
wildcard address.
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with the recent change in pve-manager pveproxy (and spiceproxy)
try binding to '::' per default. This fails for hosts having disabled
ipv6 via kernel commandline.
Our desired behavior of binding on '::' and only falling back to
'0.0.0.0' in case this is not supported is not directly possible with
IO::Socket::IP->new (or rather by Socket::GetAddrInfo, which at least
on my system always returns the v4 wildcard-address first).
the code now binds to:
* the provided $host if not undef
* '::' if $host is not set
* '0.0.0.0' if $host is not set and binding on '::' yields an error
Tested-by: Oguz Bektas <o.bektas@proxmox.com>
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
---
src/PVE/Daemon.pm | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/src/PVE/Daemon.pm b/src/PVE/Daemon.pm
index 79b90ad..2ab4f35 100644
--- a/src/PVE/Daemon.pm
+++ b/src/PVE/Daemon.pm
@@ -819,14 +819,23 @@ sub create_reusable_socket {
$socket->fcntl(Fcntl::F_SETFD(), Fcntl::FD_CLOEXEC);
} else {
- $socket = IO::Socket::IP->new(
- LocalHost => $host,
+ my %sockargs = (
LocalPort => $port,
Listen => SOMAXCONN,
Proto => 'tcp',
GetAddrInfoFlags => 0,
- ReuseAddr => 1) ||
- die "unable to create socket - $@\n";
+ ReuseAddr => 1,
+ );
+ if (defined($host)) {
+ $socket = IO::Socket::IP->new( LocalHost => $host, %sockargs) ||
+ die "unable to create socket - $@\n";
+ } else {
+ # disabling AF_INET6 (by adding ipv6.disable=1 to the kernel cmdline)
+ # causes bind on :: to fail, try 0.0.0.0 in that case
+ $socket = IO::Socket::IP->new( LocalHost => '::', %sockargs) //
+ IO::Socket::IP->new( LocalHost => '0.0.0.0', %sockargs);
+ die "unable to create socket - $@\n" if !$socket;
+ }
# we often observe delays when using Nagle algorithm,
# so we disable that to maximize performance
--
2.20.1