367 lines
12 KiB
Python
367 lines
12 KiB
Python
import base64
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import ipaddress
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import re
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from flask import Blueprint, make_response, redirect, flash, request
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from auth import require_level
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from config_utils import load_core, save_core, verify_core_hash, queued_msg, CONFIGS_DIR
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import sanitize
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import validate
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bp = Blueprint('action_apply_vpn', __name__)
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_VIEW = '/view/view_vpn'
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_MTU_MIN = 576
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_MTU_MAX = 9000
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def _wg_vlan(core):
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return next((v for v in core.get('vlans', []) if v.get('is_vpn')), None)
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def _wg_vlan_by_name(core, name):
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return next((v for v in core.get('vlans', []) if v.get('is_vpn') and v.get('name') == name), None)
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def _find_peer_by_flat_idx(core, flat_idx):
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"""Return (vlan, peer_list_index) by flat index across all VPN VLANs in order."""
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i = 0
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for vlan in core.get('vlans', []):
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if not vlan.get('is_vpn'):
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continue
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peers = vlan.get('peers', [])
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for j in range(len(peers)):
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if i == flat_idx:
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return vlan, j
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i += 1
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return None, None
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def _wg_iface(vlan, core):
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"""Return the WireGuard interface name (wg0, wg1, ...) for a VPN VLAN."""
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wg_vlans = [v for v in core.get('vlans', []) if v.get('is_vpn')]
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idx = next((i for i, v in enumerate(wg_vlans) if v is vlan), 0)
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return f'wg{idx}'
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def _row_index():
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try:
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return int(request.form.get('row_index', ''))
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except (ValueError, TypeError):
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return None
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def _hash_ok():
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if not verify_core_hash(request.form.get('config_hash', '')):
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flash('Configuration was modified by another session. Please refresh and try again.', 'error')
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return False
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return True
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def _generate_wg_keypair():
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"""Generate an X25519 keypair compatible with WireGuard. Returns (private_b64, public_b64)."""
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from cryptography.hazmat.primitives.asymmetric.x25519 import X25519PrivateKey
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from cryptography.hazmat.primitives.serialization import (
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Encoding, PublicFormat, PrivateFormat, NoEncryption,
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)
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private = X25519PrivateKey.generate()
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priv_raw = private.private_bytes(Encoding.Raw, PrivateFormat.Raw, NoEncryption())
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pub_raw = private.public_key().public_bytes(Encoding.Raw, PublicFormat.Raw)
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return base64.b64encode(priv_raw).decode(), base64.b64encode(pub_raw).decode()
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def _server_pubkey(iface):
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"""Read the server public key written by core.py --apply."""
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try:
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with open(f'{CONFIGS_DIR}/.wg-{iface}.pub') as f:
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return f.read().strip()
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except OSError:
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return None
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def _build_client_conf(vlan, peer_name, peer_ip, private_key, server_pubkey):
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"""Build WireGuard client .conf content."""
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info = vlan.get('vpn_information', {})
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overrides = info.get('explicit_overrides', {})
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subnet = vlan.get('subnet', '')
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mask = vlan.get('subnet_mask', '')
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network = ipaddress.IPv4Network(f'{subnet}/{mask}', strict=False)
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ident_ips = [s['ip'] for s in vlan.get('server_identities', []) if s.get('ip')]
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default = str(min((ipaddress.IPv4Address(ip) for ip in ident_ips),
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key=lambda x: x.packed[-1])) if ident_ips else str(next(network.hosts()))
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gateway = overrides.get('gateway') or default
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dns = overrides.get('dns_server') or gateway
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prefix = network.prefixlen
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mtu = overrides.get('mtu', '')
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endpoint = info.get('server_endpoint', '')
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listen_port = info.get('listen_port', 51820)
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split_tunnel = next(
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(p.get('split_tunnel', False) for p in vlan.get('peers', []) if p.get('name') == peer_name),
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False
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)
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allowed_ips = f'{subnet}/{prefix}' if split_tunnel else '0.0.0.0/0'
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lines = [
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'# Generated by router-dash',
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'',
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'[Interface]',
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f'PrivateKey = {private_key}',
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f'Address = {peer_ip}/{prefix}',
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f'DNS = {dns}',
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]
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if mtu:
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lines.append(f'MTU = {mtu}')
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lines += ['', '[Peer]', f'PublicKey = {server_pubkey}']
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if endpoint:
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lines.append(f'Endpoint = {endpoint}:{listen_port}')
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lines += [f'AllowedIPs = {allowed_ips}', 'PersistentKeepalive = 25', '']
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return '\n'.join(lines)
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def _conf_response(vlan, peer_name, peer_ip, private_key):
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"""Return a .conf file download response, or redirect with error if pubkey unavailable."""
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core = load_core()
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iface = _wg_iface(vlan, core)
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server_pub = _server_pubkey(iface)
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if not server_pub:
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flash('Peer saved. Run sudo python3 ~/router/core.py --apply to generate the server '
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'public key, then regenerate this peer to download the client config.', 'warning')
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return redirect(_VIEW)
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conf = _build_client_conf(vlan, peer_name, peer_ip, private_key, server_pub)
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safe = re.sub(r'[^A-Za-z0-9_\-]', '_', peer_name)
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resp = make_response(conf)
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resp.headers['Content-Type'] = 'text/plain; charset=utf-8'
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resp.headers['Content-Disposition'] = f'attachment; filename="vpn-client-{safe}.conf"'
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return resp
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@bp.route('/action/apply_vpn', methods=['POST'])
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@require_level('administrator')
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def apply_vpn():
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listen_port_raw = request.form.get('vpn_listen_port', '').strip()
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server_endpoint = sanitize.domainname(request.form.get('vpn_server_endpoint', ''))
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domain = sanitize.domainname(request.form.get('vpn_domain', ''))
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dns_raw = request.form.get('vpn_dns_server', '').strip()
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mtu_raw = request.form.get('vpn_mtu', '').strip()
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if not listen_port_raw:
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flash('Listen port is required.', 'error')
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return redirect(_VIEW)
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try:
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listen_port = int(listen_port_raw)
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if not (1 <= listen_port <= 65535):
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raise ValueError
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except (ValueError, TypeError):
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flash(f'"{listen_port_raw}" is not a valid port number (1-65535).', 'error')
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return redirect(_VIEW)
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dns_server = ''
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if dns_raw:
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dns_server = validate.ip(dns_raw)
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if not dns_server:
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flash(f'"{dns_raw}" is not a valid IP address for DNS server.', 'error')
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return redirect(_VIEW)
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mtu = None
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if mtu_raw:
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try:
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mtu = int(mtu_raw)
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if not (_MTU_MIN <= mtu <= _MTU_MAX):
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raise ValueError
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except (ValueError, TypeError):
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flash(f'"{mtu_raw}" is not a valid MTU (must be {_MTU_MIN}-{_MTU_MAX}).', 'error')
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return redirect(_VIEW)
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if not _hash_ok():
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return redirect(_VIEW)
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core = load_core()
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vpn_vlan = _wg_vlan(core)
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if vpn_vlan is None:
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flash('No WireGuard VLAN found in configuration.', 'error')
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return redirect(_VIEW)
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info = vpn_vlan.setdefault('vpn_information', {})
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info['listen_port'] = listen_port
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info['server_endpoint'] = server_endpoint
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info['domain'] = domain
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overrides = info.setdefault('explicit_overrides', {})
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if dns_server:
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overrides['dns_server'] = dns_server
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else:
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overrides.pop('dns_server', None)
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if mtu is not None:
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overrides['mtu'] = mtu
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else:
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overrides.pop('mtu', None)
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save_core(core)
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flash(queued_msg('core apply'), 'success')
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return redirect(_VIEW)
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@bp.route('/action/add_vpn_peer', methods=['POST'])
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@require_level('administrator')
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def add_vpn_peer():
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peer_name = sanitize.name(request.form.get('peer_name', ''))
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peer_vlan_nm = request.form.get('peer_vlan', '').strip()
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peer_ip_raw = request.form.get('peer_ip', '').strip()
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split_tunnel = 'split_tunnel' in request.form
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enabled = 'enabled' in request.form
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if not peer_name:
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flash('Peer name is required.', 'error')
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return redirect(_VIEW)
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if not peer_vlan_nm:
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flash('Assigned VLAN is required.', 'error')
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return redirect(_VIEW)
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peer_ip = validate.ip(peer_ip_raw)
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if not peer_ip:
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flash(f'"{peer_ip_raw}" is not a valid IP address.', 'error')
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return redirect(_VIEW)
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if not _hash_ok():
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return redirect(_VIEW)
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core = load_core()
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vpn_vlan = _wg_vlan_by_name(core, peer_vlan_nm)
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if vpn_vlan is None:
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flash(f'VPN VLAN "{peer_vlan_nm}" not found.', 'error')
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return redirect(_VIEW)
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try:
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network = ipaddress.IPv4Network(f"{vpn_vlan['subnet']}/{vpn_vlan['subnet_mask']}", strict=False)
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if ipaddress.IPv4Address(peer_ip) not in network:
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flash(f'{peer_ip} is not within the subnet {vpn_vlan["subnet"]}/{vpn_vlan["subnet_mask"]} of {peer_vlan_nm}.', 'error')
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return redirect(_VIEW)
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except Exception:
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pass
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peers = vpn_vlan.setdefault('peers', [])
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if any(p.get('name') == peer_name for p in peers):
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flash(f'A peer named "{peer_name}" already exists.', 'error')
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return redirect(_VIEW)
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for v in core.get('vlans', []):
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if not v.get('is_vpn'):
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continue
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if any(p.get('ip') == peer_ip for p in v.get('peers', [])):
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flash(f'IP address {peer_ip} is already assigned to another peer.', 'error')
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return redirect(_VIEW)
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private_key, public_key = _generate_wg_keypair()
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peers.append({
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'name': peer_name,
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'ip': peer_ip,
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'public_key': public_key,
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'split_tunnel': split_tunnel,
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'enabled': enabled,
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})
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save_core(core)
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return _conf_response(vpn_vlan, peer_name, peer_ip, private_key)
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@bp.route('/action/edit_vpn_peer', methods=['POST'])
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@require_level('administrator')
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def edit_vpn_peer():
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flat_idx = _row_index()
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if flat_idx is None:
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flash('Invalid request.', 'error')
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return redirect(_VIEW)
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peer_name = sanitize.name(request.form.get('name', ''))
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split_tunnel = request.form.get('split_tunnel') in ('true', '1', 'on', 'yes')
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enabled = request.form.get('enabled') not in ('false', '0', '')
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if not peer_name:
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flash('Peer name is required.', 'error')
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return redirect(_VIEW)
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if not _hash_ok():
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return redirect(_VIEW)
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core = load_core()
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vlan, peer_idx = _find_peer_by_flat_idx(core, flat_idx)
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if vlan is None:
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flash('Peer not found.', 'error')
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return redirect(_VIEW)
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peers = vlan.get('peers', [])
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if any(j != peer_idx and p.get('name') == peer_name for j, p in enumerate(peers)):
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flash(f'A peer named "{peer_name}" already exists.', 'error')
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return redirect(_VIEW)
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peers[peer_idx].update({'name': peer_name, 'split_tunnel': split_tunnel, 'enabled': enabled})
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save_core(core)
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flash(queued_msg('core apply'), 'success')
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return redirect(_VIEW)
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@bp.route('/action/toggle_vpn_peer', methods=['POST'])
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@require_level('administrator')
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def toggle_vpn_peer():
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flat_idx = _row_index()
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if flat_idx is None:
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flash('Invalid request.', 'error')
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return redirect(_VIEW)
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if not _hash_ok():
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return redirect(_VIEW)
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core = load_core()
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vlan, peer_idx = _find_peer_by_flat_idx(core, flat_idx)
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if vlan is None:
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flash('Peer not found.', 'error')
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return redirect(_VIEW)
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peers = vlan.get('peers', [])
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peers[peer_idx]['enabled'] = not peers[peer_idx].get('enabled', True)
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save_core(core)
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flash(queued_msg('core apply'), 'success')
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return redirect(_VIEW)
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@bp.route('/action/delete_vpn_peer', methods=['POST'])
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@require_level('administrator')
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def delete_vpn_peer():
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flat_idx = _row_index()
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if flat_idx is None:
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flash('Invalid request.', 'error')
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return redirect(_VIEW)
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if not _hash_ok():
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return redirect(_VIEW)
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core = load_core()
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vlan, peer_idx = _find_peer_by_flat_idx(core, flat_idx)
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if vlan is None:
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flash('Peer not found.', 'error')
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return redirect(_VIEW)
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vlan.get('peers', []).pop(peer_idx)
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save_core(core)
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flash(queued_msg('core apply'), 'success')
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return redirect(_VIEW)
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@bp.route('/action/regenerate_vpn_peer', methods=['POST'])
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@require_level('administrator')
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def regenerate_vpn_peer():
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flat_idx = _row_index()
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if flat_idx is None:
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flash('Invalid request.', 'error')
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return redirect(_VIEW)
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if not _hash_ok():
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return redirect(_VIEW)
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core = load_core()
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vlan, peer_idx = _find_peer_by_flat_idx(core, flat_idx)
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if vlan is None:
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flash('Peer not found.', 'error')
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return redirect(_VIEW)
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private_key, public_key = _generate_wg_keypair()
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peer = vlan['peers'][peer_idx]
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peer['public_key'] = public_key
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save_core(core)
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return _conf_response(vlan, peer['name'], peer['ip'], private_key)
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