dhcp_state.h

// Copyright 2016-2024 Nicholas J. Kain <njkain at gmail dot com>
// SPDX-License-Identifier: MIT
#ifndef NDHS_DHCP_STATE_H_
#define NDHS_DHCP_STATE_H_

#include <ipaddr.h>

#include <nlsocket.h>

struct dhcpv6_entry {
    struct dhcpv6_entry *next;
    struct in6_addr address;
    size_t duid_len;
    uint32_t lifetime;
    uint32_t iaid;
    char duid[];
};

struct dhcpv4_entry {
    struct dhcpv4_entry *next;
    uint8_t macaddr[6];
    struct in6_addr address;
    uint32_t lifetime;
};

struct blob {
    size_t n;
    const char *s;
};

struct addrlist {
    size_t n;
    struct in6_addr *addrs;
};

void create_blobs(void);
bool emplace_bind4(size_t linenum, const char *interface);
bool emplace_bind6(size_t linenum, const char *interface);
int emplace_interface(size_t linenum, const char *interface, uint8_t preference);
bool emplace_dhcp6_state(size_t linenum, int ifindex,
                         const char *duid, size_t duid_len,
                         uint32_t iaid, const struct in6_addr *v6_addr, uint32_t default_lifetime);
bool emplace_dhcp4_state(size_t linenum, int ifindex, const uint8_t *macaddr,
                         const struct in6_addr *v4_addr, uint32_t default_lifetime);
bool emplace_dns_servers(size_t linenum, int ifindex, struct in6_addr *addrs, size_t naddrs);
bool emplace_ntp_servers(size_t linenum, int ifindex, struct in6_addr *addrs, size_t naddrs);
bool emplace_subnet(int ifindex, const struct in6_addr *addr);
bool emplace_gateway_v4(size_t linenum, int ifindex, const struct in6_addr *addr);
bool emplace_broadcast(int ifindex, const struct in6_addr *addr);
bool emplace_dynamic_range(size_t linenum, int ifindex,
                           const struct in6_addr *lo_addr, const struct in6_addr *hi_addr,
                           uint32_t dynamic_lifetime);
bool emplace_dynamic_v6(size_t linenum, int ifindex);
bool emplace_dns_search(size_t linenum, int ifindex, const char *label, size_t label_len);
const struct dhcpv6_entry *query_dhcp6_state(int ifindex,
                                             const char *duid, size_t duid_len,
                                             uint32_t iaid);
const struct dhcpv4_entry *query_dhcp4_state(int ifindex, const uint8_t *hwaddr);
struct addrlist query_dns_servers(int ifindex);
struct addrlist query_ntp_servers(int ifindex);
struct blob query_dns4_search_blob(int ifindex);
struct blob query_dns6_search_blob(int ifindex);
const struct in6_addr *query_gateway_v4(int ifindex);
const struct in6_addr *query_subnet(int ifindex);
const struct in6_addr *query_broadcast(int ifindex);
bool query_dynamic_range(int ifindex, struct in6_addr *lo, struct in6_addr *hi);
bool query_use_dynamic_v4(int ifindex, uint32_t *dynamic_lifetime);
bool query_use_dynamic_v6(int ifindex, uint32_t *dynamic_lifetime);
bool query_unused_addr_v6(int ifindex, const struct in6_addr *addr);
size_t bound_interfaces_count(void);
void bound_interfaces_foreach(void (*fn)(const struct netif_info *, bool, bool, uint8_t, void *), void *userptr);

#endif