/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once

#include <inttypes.h>
#include <stdbool.h>

#include "sd-netlink.h"

#include "conf-parser.h"
#include "in-addr-util.h"
#include "networkd-link.h"
#include "networkd-util.h"

typedef struct Manager Manager;
typedef struct Network Network;
typedef struct Request Request;
typedef struct Route Route;
typedef int (*route_netlink_handler_t)(
                sd_netlink *rtnl,
                sd_netlink_message *m,
                Request *req,
                Link *link,
                Route *route);

struct Route {
        Link *link;
        Manager *manager;
        Network *network;
        ConfigSection *section;
        NetworkConfigSource source;
        NetworkConfigState state;
        union in_addr_union provider; /* DHCP server or router address */

        int family;
        int gw_family;
        uint32_t gw_weight;
        int quickack;
        int fast_open_no_cookie;
        int ttl_propagate;

        unsigned char dst_prefixlen;
        unsigned char src_prefixlen;
        unsigned char scope;
        unsigned char protocol;  /* RTPROT_* */
        unsigned char type; /* RTN_* */
        unsigned char tos;
        uint32_t priority; /* note that ip(8) calls this 'metric' */
        uint32_t table;
        uint32_t mtu;
        uint32_t initcwnd;
        uint32_t initrwnd;
        uint32_t advmss;
        char *tcp_congestion_control_algo;
        unsigned char pref;
        unsigned flags;
        int gateway_onlink; /* Only used in conf parser and route_section_verify(). */
        uint32_t nexthop_id;

        bool scope_set:1;
        bool table_set:1;
        bool priority_set:1;
        bool protocol_set:1;
        bool pref_set:1;
        bool gateway_from_dhcp_or_ra:1;

        union in_addr_union gw;
        union in_addr_union dst;
        union in_addr_union src;
        union in_addr_union prefsrc;
        OrderedSet *multipath_routes;

        /* This is an absolute point in time, and NOT a timespan/duration.
         * Must be specified with clock_boottime_or_monotonic(). */
        usec_t lifetime_usec;
        /* Used when kernel does not support RTA_EXPIRES attribute. */
        sd_event_source *expire;
};

extern const struct hash_ops route_hash_ops;

int route_new(Route **ret);
Route *route_free(Route *route);
DEFINE_SECTION_CLEANUP_FUNCTIONS(Route, route_free);
int route_dup(const Route *src, Route **ret);

int route_configure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg);
int route_remove(Route *route);
int route_remove_and_drop(Route *route);

int route_get(Manager *manager, Link *link, const Route *in, Route **ret);

int link_drop_managed_routes(Link *link);
int link_drop_foreign_routes(Link *link);
void link_foreignize_routes(Link *link);

void route_cancel_request(Route *route, Link *link);
int link_request_route(
                Link *link,
                Route *route,
                bool consume_object,
                unsigned *message_counter,
                route_netlink_handler_t netlink_handler,
                Request **ret);
int link_request_static_routes(Link *link, bool only_ipv4);

int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, Manager *m);

int network_add_ipv4ll_route(Network *network);
int network_add_default_route_on_device(Network *network);
void network_drop_invalid_routes(Network *network);

DEFINE_NETWORK_CONFIG_STATE_FUNCTIONS(Route, route);
void link_mark_routes(Link *link, NetworkConfigSource source);

CONFIG_PARSER_PROTOTYPE(config_parse_gateway);
CONFIG_PARSER_PROTOTYPE(config_parse_preferred_src);
CONFIG_PARSER_PROTOTYPE(config_parse_destination);
CONFIG_PARSER_PROTOTYPE(config_parse_route_priority);
CONFIG_PARSER_PROTOTYPE(config_parse_route_scope);
CONFIG_PARSER_PROTOTYPE(config_parse_route_table);
CONFIG_PARSER_PROTOTYPE(config_parse_route_boolean);
CONFIG_PARSER_PROTOTYPE(config_parse_ipv6_route_preference);
CONFIG_PARSER_PROTOTYPE(config_parse_route_protocol);
CONFIG_PARSER_PROTOTYPE(config_parse_route_type);
CONFIG_PARSER_PROTOTYPE(config_parse_tcp_window);
CONFIG_PARSER_PROTOTYPE(config_parse_route_mtu);
CONFIG_PARSER_PROTOTYPE(config_parse_multipath_route);
CONFIG_PARSER_PROTOTYPE(config_parse_tcp_congestion);
CONFIG_PARSER_PROTOTYPE(config_parse_tcp_advmss);
CONFIG_PARSER_PROTOTYPE(config_parse_route_nexthop);