import re from django import forms from django.utils.translation import gettext_lazy as _ from firewall.models import FirewallRule, FirewallSettings, RedirectRule from wgwadmlibrary.tools import list_network_interfaces from wireguard.models import Peer, WireGuardInstance class RedirectRuleForm(forms.ModelForm): description = forms.CharField(label='Description', required=False) protocol = forms.ChoiceField(label='Protocol', choices=[('tcp', 'TCP'), ('udp', 'UDP')], initial='tcp') port = forms.IntegerField(label='Port', initial=8080, min_value=1, max_value=65535) port_forward = forms.IntegerField(label='Port Forward', required=False, min_value=1, max_value=65535) add_forward_rule = forms.BooleanField(label='Add Forward Rule', required=False, initial=True) masquerade_source = forms.BooleanField(label='Masquerade Source (not recommended)', required=False) peer = forms.ModelChoiceField(label='Peer', queryset=Peer.objects.all(), required=False) wireguard_instance = forms.ModelChoiceField(label='WireGuard Instance', queryset=WireGuardInstance.objects.all().order_by('instance_id'), required=True) ip_address = forms.GenericIPAddressField(label='IP Address', required=False) class Meta: model = RedirectRule fields = ['description', 'protocol', 'port', 'add_forward_rule', 'masquerade_source', 'peer', 'wireguard_instance', 'ip_address', 'port_forward'] def __init__(self, *args, **kwargs): super(RedirectRuleForm, self).__init__(*args, **kwargs) if self.fields['wireguard_instance'].queryset.exists(): self.fields['wireguard_instance'].initial = self.fields['wireguard_instance'].queryset.first().uuid def clean(self): cleaned_data = super().clean() port = cleaned_data.get('port') protocol = cleaned_data.get('protocol') peer = cleaned_data.get('peer') ip_address = cleaned_data.get('ip_address') wireguard_instance = cleaned_data.get('wireguard_instance') port_forward = cleaned_data.get('port_forward') if not port: raise forms.ValidationError(_("Port is required.")) if port == 8000 and protocol == 'tcp': raise forms.ValidationError(_("Port 8000 (tcp) is reserved for wireguard-webadmin.")) if protocol == 'udp': if WireGuardInstance.objects.filter(listen_port=port).exists(): raise forms.ValidationError(_("Port %s is already in use by another WireGuard instance.") % port) if not peer and not ip_address: raise forms.ValidationError(_("Invalid Destination. Either Peer or IP Address must be informed.")) if peer and ip_address: raise forms.ValidationError(_("Peer and IP Address cannot be selected at the same time.")) if ip_address and not wireguard_instance: raise forms.ValidationError(_("IP Address cannot be used without selecting a WireGuard instance.")) if peer: cleaned_data['wireguard_instance'] = peer.wireguard_instance cleaned_data['ip_address'] = None if ip_address: cleaned_data['peer'] = None return cleaned_data class FirewallRuleForm(forms.ModelForm): def __init__(self, *args, **kwargs): current_chain = kwargs.pop('current_chain', None) super(FirewallRuleForm, self).__init__(*args, **kwargs) firewall_settings, firewall_settings_created = FirewallSettings.objects.get_or_create(name='global') interface_list = [('', '------'),] interface_list.append((firewall_settings.wan_interface, firewall_settings.wan_interface + ' (WAN)')) for wireguard_instance in WireGuardInstance.objects.all().order_by('instance_id'): wireguard_instance_interface = 'wg'+ str(wireguard_instance.instance_id) interface_list.append((wireguard_instance_interface, wireguard_instance_interface)) interface_list.append(('wg+', _('wg+ (Any WireGuard Interface)'))) description = forms.CharField(required=False) firewall_chain = forms.ChoiceField(choices=[('forward', 'FORWARD'), ('postrouting', 'POSTROUTING (nat)')]) in_interface = forms.ChoiceField(required=False) out_interface = forms.ChoiceField(required=False) source_ip = forms.GenericIPAddressField(required=False) source_netmask = forms.IntegerField(initial=32, min_value=0, max_value=32) source_peer = forms.ModelMultipleChoiceField(queryset=Peer.objects.all(), required=False) source_peer_include_networks = forms.BooleanField(required=False) not_source = forms.BooleanField(required=False) destination_ip = forms.GenericIPAddressField(required=False) destination_netmask = forms.IntegerField(initial=32, min_value=0, max_value=32) destination_peer = forms.ModelMultipleChoiceField(queryset=Peer.objects.all(), required=False) destination_peer_include_networks = forms.BooleanField(required=False) not_destination = forms.BooleanField(required=False) protocol = forms.ChoiceField(choices=[('', 'all'), ('tcp', 'TCP'), ('udp', 'UDP'), ('both', 'TCP+UDP'), ('icmp', 'ICMP')], required=False) destination_port = forms.CharField(required=False) state_new = forms.BooleanField(required=False) state_related = forms.BooleanField(required=False) state_established = forms.BooleanField(required=False) state_invalid = forms.BooleanField(required=False) state_untracked = forms.BooleanField(required=False) not_state = forms.BooleanField(required=False) rule_action = forms.ChoiceField(initial='accept', choices=[('accept', 'ACCEPT'), ('reject', 'REJECT'), ('drop', 'DROP'), ('masquerade', 'MASQUERADE')]) sort_order = forms.IntegerField(initial=0, min_value=0) self.fields['firewall_chain'].initial = current_chain self.fields['in_interface'].choices = interface_list self.fields['out_interface'].choices = interface_list self.fields['description'].label = _('Description') self.fields['firewall_chain'].label = _('Firewall Chain') self.fields['in_interface'].label = _('In Interface') self.fields['out_interface'].label = _('Out Interface') self.fields['source_ip'].label = _('Source IP') self.fields['source_netmask'].label = _('Netmask') self.fields['source_peer'].label = _('Source Peer') self.fields['source_peer_include_networks'].label = _('Source Peer Include Networks') self.fields['not_source'].label = _('Not Source') self.fields['destination_ip'].label = _('Destination IP') self.fields['destination_netmask'].label = _('Netmask') self.fields['destination_peer'].label = _('Destination Peer') self.fields['destination_peer_include_networks'].label = _('Destination Peer Include Networks') self.fields['not_destination'].label = _('Not Destination') self.fields['protocol'].label = _('Protocol') self.fields['destination_port'].label = _('Destination Port') self.fields['state_new'].label = _('New') self.fields['state_related'].label = _('Related') self.fields['state_established'].label = _('Established') self.fields['state_invalid'].label = _('Invalid') self.fields['state_untracked'].label = _('Untracked') self.fields['not_state'].label = _('Not State') self.fields['rule_action'].label = _('Rule Action') self.fields['sort_order'].label = _('Sort Order') class Meta: model = FirewallRule fields = ['description', 'firewall_chain', 'in_interface', 'out_interface', 'source_ip', 'source_netmask', 'source_peer', 'source_peer_include_networks', 'not_source', 'destination_ip', 'destination_netmask', 'destination_peer', 'destination_peer_include_networks', 'not_destination', 'protocol', 'destination_port', 'state_new', 'state_related', 'state_established', 'state_invalid', 'state_untracked', 'not_state', 'rule_action', 'sort_order'] def clean(self): cleaned_data = super().clean() firewall_chain = cleaned_data.get('firewall_chain') rule_action = cleaned_data.get('rule_action') in_interface = cleaned_data.get('in_interface') destination_port = self.cleaned_data.get('destination_port') protocol = cleaned_data.get('protocol') if firewall_chain == 'forward' and rule_action not in ['accept', 'drop', 'reject']: raise forms.ValidationError("Invalid rule action for firewall chain 'forward'. Allowed actions are 'accept', 'drop', and 'reject'.") if firewall_chain == 'postrouting': if rule_action not in ['masquerade', 'accept']: raise forms.ValidationError("Invalid rule action for firewall chain 'postrouting'. Allowed actions are 'masquerade' and 'accept'.") if in_interface: raise forms.ValidationError("In Interface cannot be used with firewall chain 'postrouting'.") if destination_port: if protocol not in ['tcp', 'udp', 'both']: raise forms.ValidationError("Destination Port can only be used with protocol 'tcp' and/or 'udp'.") if not re.match(r'^(\d+|\d+:\d+)$', destination_port): raise forms.ValidationError("Invalid destination port format. Use a single port number or a range of port numbers separated by a colon. Example: 80 or 8000:8080.") if ':' in destination_port: start, end = map(int, destination_port.split(':')) if not 1 <= start <= 65535 or not 1 <= end <= 65535 or start >= end: raise forms.ValidationError("Invalid port range. The start and end port numbers must be between 1 and 65535 and the start port number must be less than the end port number.") else: port = int(destination_port) if not 1 <= port <= 65535: raise forms.ValidationError("Invalid port number. The port number must be between 1 and 65535.") return cleaned_data class FirewallSettingsForm(forms.ModelForm): interface_choices = [] for interface in list_network_interfaces(): if not interface.startswith('wg') and interface != 'lo': interface_choices.append((interface, interface)) default_forward_policy = forms.ChoiceField(label=_('Default Forward Policy'), choices=[('accept', _('ACCEPT')), ('reject', _('REJECT')), ('drop', _('DROP'))], initial='accept') allow_peer_to_peer = forms.BooleanField(label=_('Allow Peer to Peer'), required=False) allow_instance_to_instance = forms.BooleanField(label=_('Allow Instance to Instance'), required=False) wan_interface = forms.ChoiceField(label=_('WAN Interface'), choices=interface_choices, initial='eth0') class Meta: model = FirewallSettings fields = ['default_forward_policy', 'allow_peer_to_peer', 'allow_instance_to_instance', 'wan_interface']