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diff --git a/src/grp-network/libnetworkd-core/networkd-network.h b/src/grp-network/libnetworkd-core/networkd-network.h
new file mode 100644
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+++ b/src/grp-network/libnetworkd-core/networkd-network.h
@@ -0,0 +1,253 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <systemd/sd-bus.h>
+
+#include "systemd-basic/hashmap.h"
+#include "systemd-network/dhcp-identifier.h"
+#include "systemd-shared/condition.h"
+#include "systemd-shared/resolve-util.h"
+#include "udev.h"
+
+#include "networkd-address.h"
+#include "networkd-brvlan.h"
+#include "networkd-fdb.h"
+#include "networkd-lldp-tx.h"
+#include "networkd-netdev.h"
+#include "networkd-route.h"
+#include "networkd-util.h"
+
+#define DHCP_ROUTE_METRIC 1024
+#define IPV4LL_ROUTE_METRIC 2048
+
+#define BRIDGE_VLAN_BITMAP_MAX 4096
+#define BRIDGE_VLAN_BITMAP_LEN (BRIDGE_VLAN_BITMAP_MAX / 32)
+
+typedef enum DCHPClientIdentifier {
+ DHCP_CLIENT_ID_MAC,
+ DHCP_CLIENT_ID_DUID,
+ _DHCP_CLIENT_ID_MAX,
+ _DHCP_CLIENT_ID_INVALID = -1,
+} DCHPClientIdentifier;
+
+typedef enum IPv6PrivacyExtensions {
+ /* The values map to the kernel's /proc/sys/net/ipv6/conf/xxx/use_tempaddr values */
+ IPV6_PRIVACY_EXTENSIONS_NO,
+ IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC,
+ IPV6_PRIVACY_EXTENSIONS_YES, /* aka prefer-temporary */
+ _IPV6_PRIVACY_EXTENSIONS_MAX,
+ _IPV6_PRIVACY_EXTENSIONS_INVALID = -1,
+} IPv6PrivacyExtensions;
+
+typedef enum DHCPUseDomains {
+ DHCP_USE_DOMAINS_NO,
+ DHCP_USE_DOMAINS_YES,
+ DHCP_USE_DOMAINS_ROUTE,
+ _DHCP_USE_DOMAINS_MAX,
+ _DHCP_USE_DOMAINS_INVALID = -1,
+} DHCPUseDomains;
+
+typedef enum LLDPMode {
+ LLDP_MODE_NO = 0,
+ LLDP_MODE_YES = 1,
+ LLDP_MODE_ROUTERS_ONLY = 2,
+ _LLDP_MODE_MAX,
+ _LLDP_MODE_INVALID = -1,
+} LLDPMode;
+
+typedef struct DUID {
+ /* Value of Type in [DHCP] section */
+ DUIDType type;
+
+ uint8_t raw_data_len;
+ uint8_t raw_data[MAX_DUID_LEN];
+} DUID;
+
+typedef struct Manager Manager;
+
+struct Network {
+ Manager *manager;
+
+ char *filename;
+ char *name;
+
+ struct ether_addr *match_mac;
+ char **match_path;
+ char **match_driver;
+ char **match_type;
+ char **match_name;
+
+ Condition *match_host;
+ Condition *match_virt;
+ Condition *match_kernel;
+ Condition *match_arch;
+
+ char *description;
+
+ NetDev *bridge;
+ NetDev *bond;
+ NetDev *vrf;
+ Hashmap *stacked_netdevs;
+
+ /* DHCP Client Support */
+ AddressFamilyBoolean dhcp;
+ DCHPClientIdentifier dhcp_client_identifier;
+ char *dhcp_vendor_class_identifier;
+ char *dhcp_hostname;
+ bool dhcp_use_dns;
+ bool dhcp_use_ntp;
+ bool dhcp_use_mtu;
+ bool dhcp_use_hostname;
+ DHCPUseDomains dhcp_use_domains;
+ bool dhcp_send_hostname;
+ bool dhcp_broadcast;
+ bool dhcp_critical;
+ bool dhcp_use_routes;
+ bool dhcp_use_timezone;
+ unsigned dhcp_route_metric;
+ uint32_t dhcp_route_table;
+
+ /* DHCP Server Support */
+ bool dhcp_server;
+ bool dhcp_server_emit_dns;
+ struct in_addr *dhcp_server_dns;
+ unsigned n_dhcp_server_dns;
+ bool dhcp_server_emit_ntp;
+ struct in_addr *dhcp_server_ntp;
+ unsigned n_dhcp_server_ntp;
+ bool dhcp_server_emit_router;
+ bool dhcp_server_emit_timezone;
+ char *dhcp_server_timezone;
+ usec_t dhcp_server_default_lease_time_usec, dhcp_server_max_lease_time_usec;
+ uint32_t dhcp_server_pool_offset;
+ uint32_t dhcp_server_pool_size;
+
+ /* IPV4LL Support */
+ AddressFamilyBoolean link_local;
+ bool ipv4ll_route;
+
+ /* Bridge Support */
+ bool use_bpdu;
+ bool hairpin;
+ bool fast_leave;
+ bool allow_port_to_be_root;
+ bool unicast_flood;
+ unsigned cost;
+
+ bool use_br_vlan;
+ uint16_t pvid;
+ uint32_t br_vid_bitmap[BRIDGE_VLAN_BITMAP_LEN];
+ uint32_t br_untagged_bitmap[BRIDGE_VLAN_BITMAP_LEN];
+
+ AddressFamilyBoolean ip_forward;
+ bool ip_masquerade;
+
+ int ipv6_accept_ra;
+ int ipv6_dad_transmits;
+ int ipv6_hop_limit;
+ int proxy_arp;
+
+ bool ipv6_accept_ra_use_dns;
+ DHCPUseDomains ipv6_accept_ra_use_domains;
+ uint32_t ipv6_accept_ra_route_table;
+
+ union in_addr_union ipv6_token;
+ IPv6PrivacyExtensions ipv6_privacy_extensions;
+
+ struct ether_addr *mac;
+ unsigned mtu;
+ int arp;
+ uint32_t iaid;
+ DUID duid;
+
+ LLDPMode lldp_mode; /* LLDP reception */
+ LLDPEmit lldp_emit; /* LLDP transmission */
+
+ LIST_HEAD(Address, static_addresses);
+ LIST_HEAD(Route, static_routes);
+ LIST_HEAD(FdbEntry, static_fdb_entries);
+
+ unsigned n_static_addresses;
+ unsigned n_static_routes;
+ unsigned n_static_fdb_entries;
+
+ Hashmap *addresses_by_section;
+ Hashmap *routes_by_section;
+ Hashmap *fdb_entries_by_section;
+
+ char **search_domains, **route_domains, **dns, **ntp, **bind_carrier;
+
+ ResolveSupport llmnr;
+ ResolveSupport mdns;
+ DnssecMode dnssec_mode;
+ Set *dnssec_negative_trust_anchors;
+
+ LIST_FIELDS(Network, networks);
+};
+
+void network_free(Network *network);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
+#define _cleanup_network_free_ _cleanup_(network_freep)
+
+int network_load(Manager *manager);
+
+int network_get_by_name(Manager *manager, const char *name, Network **ret);
+int network_get(Manager *manager, struct udev_device *device, const char *ifname, const struct ether_addr *mac, Network **ret);
+int network_apply(Manager *manager, Network *network, Link *link);
+
+bool network_has_static_ipv6_addresses(Network *network);
+
+int config_parse_netdev(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_domains(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_tunnel(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dns(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp_client_identifier(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_ipv6token(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_ipv6_privacy_extensions(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_hostname(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_timezone(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp_server_dns(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp_server_ntp(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dnssec_negative_trust_anchors(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp_use_domains(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_lldp_mode(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_dhcp_route_table(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+
+/* Legacy IPv4LL support */
+int config_parse_ipv4ll(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+
+const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, GPERF_LEN_TYPE length);
+
+extern const sd_bus_vtable network_vtable[];
+
+int network_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
+int network_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
+
+const char* ipv6_privacy_extensions_to_string(IPv6PrivacyExtensions i) _const_;
+IPv6PrivacyExtensions ipv6_privacy_extensions_from_string(const char *s) _pure_;
+
+const char* dhcp_use_domains_to_string(DHCPUseDomains p) _const_;
+DHCPUseDomains dhcp_use_domains_from_string(const char *s) _pure_;
+
+const char* lldp_mode_to_string(LLDPMode m) _const_;
+LLDPMode lldp_mode_from_string(const char *s) _pure_;
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