[pve-devel] [PATCH http-server v2 2/3] fix #5699: pveproxy: add library methods for real IP support

[Thomas Skinner]

Signed-off-by: Thomas Skinner <tho...@atskinner.net>
---
 src/PVE/APIServer/AnyEvent.pm | 38 ++++++++++++++++++++++++++++++++++-
 src/PVE/APIServer/Utils.pm    | 15 ++++++++++++++
 2 files changed, 52 insertions(+), 1 deletion(-)

diff --git a/src/PVE/APIServer/AnyEvent.pm b/src/PVE/APIServer/AnyEvent.pm
index 24209a1..5f15a13 100644
--- a/src/PVE/APIServer/AnyEvent.pm
+++ b/src/PVE/APIServer/AnyEvent.pm
@@ -92,13 +92,14 @@ sub log_request {
     $loginfo->{written} = 1;
 
     my $peerip = $reqstate->{peer_host} || '-';
+    my $realip = $loginfo->{real_ip} || $peerip;
     my $userid = $loginfo->{userid} || '-';
     my $content_length = defined($loginfo->{content_length}) ? 
$loginfo->{content_length} : '-';
     my $code =  $loginfo->{code} || 500;
     my $requestline = $loginfo->{requestline} || '-';
     my $timestr = strftime("%d/%m/%Y:%H:%M:%S %z", localtime());
 
-    my $msg = "$peerip - $userid [$timestr] \"$requestline\" $code 
$content_length\n";
+    my $msg = "$realip - $userid [$timestr] \"$requestline\" $code 
$content_length\n";
 
     $self->write_log($msg);
 }
@@ -1474,6 +1475,18 @@ sub authenticate_and_handle_request {
 
     my $auth = {};
 
+    if (my $proxy_real_ip_header = $self->{proxy_real_ip_header}) {
+       if (my $proxy_real_ip_value = $request->header($proxy_real_ip_header)) {
+           my $real_ip = Net::IP->new($proxy_real_ip_value);
+           if (defined($real_ip) && 
$self->check_allowed_proxy($reqstate->{peer_host})) {
+               $reqstate->{log}->{real_ip} = Net::IP::ip_compress_address(
+                   $real_ip->ip(), 
+                   $real_ip->version(),
+               );
+           }
+       }
+    }
+
     if ($self->{spiceproxy}) {
        my $connect_str = $request->header('Host');
        my ($vmid, $node, $port) = 
$self->verify_spice_connect_url($connect_str);
@@ -1813,6 +1826,29 @@ sub check_host_access {
     return $match_allow;
 }
 
+sub check_allowed_proxy {
+    my ($self, $client_ip) = @_;
+
+    $client_ip = PVE::APIServer::Utils::normalize_v4_in_v6($client_ip);
+    my $client_ip_object = Net::IP->new($client_ip);
+
+    if (!$client_ip_object) {
+       $self->dprint("client IP not parsable: $@");
+       return 0;
+    }
+
+    if (my $proxy_real_ip_allow_from = $self->{proxy_real_ip_allow_from}) {
+       for my $allowed_net ($proxy_real_ip_allow_from->@*) {
+           if ($allowed_net->overlaps($client_ip_object)) {
+               $self->dprint("client IP in allowed proxies: ". 
$allowed_net->print());
+               return 1;
+           }
+       }
+       return 0;
+    }
+    return 1;
+}
+
 sub accept_connections {
     my ($self) = @_;
 
diff --git a/src/PVE/APIServer/Utils.pm b/src/PVE/APIServer/Utils.pm
index 5728d97..75f72a1 100644
--- a/src/PVE/APIServer/Utils.pm
+++ b/src/PVE/APIServer/Utils.pm
@@ -26,6 +26,8 @@ sub read_proxy_config {
     $shcmd .= 'echo \"COMPRESSION:\$COMPRESSION\";';
     $shcmd .= 'echo \"DISABLE_TLS_1_2:\$DISABLE_TLS_1_2\";';
     $shcmd .= 'echo \"DISABLE_TLS_1_3:\$DISABLE_TLS_1_3\";';
+    $shcmd .= 'echo \"PROXY_REAL_IP_HEADER:\$PROXY_REAL_IP_HEADER\";';
+    $shcmd .= 'echo \"PROXY_REAL_IP_ALLOW_FROM:\$PROXY_REAL_IP_ALLOW_FROM\";';
 
     my $data = -f $conffile ? `bash -c "$shcmd"` : '';
 
@@ -65,6 +67,19 @@ sub read_proxy_config {
            $res->{$key} = $value;
        } elsif ($key eq 'TLS_KEY_FILE') {
            $res->{$key} = $value;
+       } elsif ($key eq 'PROXY_REAL_IP_HEADER') {
+           $res->{$key} = $value;
+       } elsif ($key eq 'PROXY_REAL_IP_ALLOW_FROM') {
+           my $ips = [];
+           for my $ip (split(/,/, $value)) {
+               if ($ip eq 'all') {
+                   push @$ips, Net::IP->new('0/0') || die Net::IP::Error() . 
"\n";
+                   push @$ips, Net::IP->new('::/0') || die Net::IP::Error() . 
"\n";
+                   next;
+               }
+               push @$ips, Net::IP->new(normalize_v4_in_v6($ip)) || die 
Net::IP::Error() . "\n";
+           }
+           $res->{$key} = $ips;
        } elsif (grep { $key eq $_ } @$boolean_options) {
            die "unknown value '$value' - use 0 or 1\n" if $value !~ m/^(0|1)$/;
            $res->{$key} = $value;
-- 
2.39.5


_______________________________________________
pve-devel mailing list
pve-devel@lists.proxmox.com
https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel