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/**
* Copyright (C) 2012-2013 Steven Barth <steven@midlink.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
* the Free Software Foundation.
*
* This program 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 General Public License for more details.
*
*/
#pragma once
#include <netinet/in.h>
#include <netinet/icmp6.h>
#include <netinet/ether.h>
#include <stdbool.h>
#include <syslog.h>
#include <libubox/blobmsg.h>
#ifndef typeof
#define typeof __typeof
#endif
#ifndef container_of
#define container_of(ptr, type, member) ( \
(type *)( (char *)ptr - offsetof(type,member) ))
#endif
#include <libubox/list.h>
#include <libubox/uloop.h>
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
// RFC 6106 defines this router advertisement option
#define ND_OPT_ROUTE_INFO 24
#define ND_OPT_RECURSIVE_DNS 25
#define ND_OPT_DNS_SEARCH 31
#define RELAYD_BUFFER_SIZE 8192
#define INFINITE_VALID(x) ((x) == 0)
#define _unused __attribute__((unused))
#define _packed __attribute__((packed))
#define ALL_IPV6_NODES {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}}}
#define ALL_IPV6_ROUTERS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}}}
#define IN6_IS_ADDR_ULA(a) (((a)->s6_addr32[0] & htonl(0xfe000000)) == htonl(0xfc000000))
struct interface;
struct nl_sock;
extern struct list_head leases;
struct odhcpd_event {
struct uloop_fd uloop;
void (*handle_dgram)(void *addr, void *data, size_t len,
struct interface *iface, void *dest_addr);
void (*handle_error)(struct odhcpd_event *e, int error);
void (*recv_msgs)(struct odhcpd_event *e);
};
union if_addr {
struct in_addr in;
struct in6_addr in6;
};
struct odhcpd_ipaddr {
union if_addr addr;
uint8_t prefix;
uint32_t preferred;
uint32_t valid;
/* ipv6 only */
uint8_t dprefix;
/* ipv4 only */
struct in_addr broadcast;
};
enum odhcpd_mode {
RELAYD_DISABLED,
RELAYD_SERVER,
RELAYD_RELAY,
RELAYD_HYBRID
};
enum odhcpd_assignment_flags {
OAF_BOUND = (1 << 0),
OAF_STATIC = (1 << 1),
};
struct config {
bool legacy;
bool main_dhcpv4;
char *dhcp_cb;
char *dhcp_statefile;
int log_level;
} config;
struct lease {
struct list_head head;
struct in_addr ipaddr;
uint32_t hostid;
struct ether_addr mac;
uint16_t duid_len;
uint8_t *duid;
uint32_t dhcpv4_leasetime;
char hostname[];
};
struct interface {
struct list_head head;
int ifindex;
char *ifname;
const char *name;
// Runtime data
struct uloop_timeout timer_rs;
struct list_head ia_assignments;
struct odhcpd_ipaddr *addr4;
size_t addr4_len;
struct odhcpd_ipaddr *ia_addr;
size_t ia_addr_len;
// DHCPv4
struct odhcpd_event dhcpv6_event;
struct odhcpd_event dhcpv4_event;
struct odhcpd_event ndp_event;
struct list_head dhcpv4_assignments;
// Managed PD
char dhcpv6_pd_manager[128];
struct in6_addr dhcpv6_pd_cer;
// Services
enum odhcpd_mode ra;
enum odhcpd_mode dhcpv6;
enum odhcpd_mode ndp;
enum odhcpd_mode dhcpv4;
// Config
bool inuse;
bool external;
bool master;
bool ignore;
bool always_rewrite_dns;
bool ra_not_onlink;
bool ra_advrouter;
bool ra_useleasetime;
bool no_dynamic_dhcp;
// RA
int learn_routes;
int default_router;
int ra_managed;
int route_preference;
int ra_maxinterval;
int ra_mininterval;
int ra_lifetime;
uint32_t ra_reachabletime;
uint32_t ra_retranstime;
uint32_t ra_hoplimit;
int ra_mtu;
// DHCPv4
struct in_addr dhcpv4_start;
struct in_addr dhcpv4_end;
struct in_addr *dhcpv4_router;
size_t dhcpv4_router_cnt;
struct in_addr *dhcpv4_dns;
size_t dhcpv4_dns_cnt;
uint32_t dhcpv4_leasetime;
// DNS
struct in6_addr *dns;
size_t dns_cnt;
uint8_t *search;
size_t search_len;
// DHCPV6
void *dhcpv6_raw;
size_t dhcpv6_raw_len;
bool dhcpv6_assignall;
char *upstream;
size_t upstream_len;
char *filter_class;
};
extern struct list_head interfaces;
#define RA_MANAGED_NO_MFLAG 0
#define RA_MANAGED_MFLAG 1
#define RA_MANAGED_NO_AFLAG 2
// Exported main functions
int odhcpd_register(struct odhcpd_event *event);
int odhcpd_deregister(struct odhcpd_event *event);
void odhcpd_process(struct odhcpd_event *event);
struct nl_sock *odhcpd_create_nl_socket(int protocol);
ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
struct iovec *iov, size_t iov_len,
const struct interface *iface);
ssize_t odhcpd_get_interface_addresses(int ifindex, bool v6,
struct odhcpd_ipaddr **addrs);
int odhcpd_get_interface_dns_addr(const struct interface *iface,
struct in6_addr *addr);
struct interface* odhcpd_get_interface_by_name(const char *name);
int odhcpd_get_interface_config(const char *ifname, const char *what);
int odhcpd_get_mac(const struct interface *iface, uint8_t mac[6]);
struct interface* odhcpd_get_interface_by_index(int ifindex);
struct interface* odhcpd_get_master_interface(void);
int odhcpd_urandom(void *data, size_t len);
int odhcpd_setup_route(const struct in6_addr *addr, const int prefixlen,
const struct interface *iface, const struct in6_addr *gw,
const uint32_t metric, const bool add);
int odhcpd_setup_proxy_neigh(const struct in6_addr *addr,
const struct interface *iface, const bool add);
void odhcpd_run(void);
time_t odhcpd_time(void);
ssize_t odhcpd_unhexlify(uint8_t *dst, size_t len, const char *src);
void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len);
int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
int config_parse_interface(void *data, size_t len, const char *iname, bool overwrite);
#ifdef WITH_UBUS
int init_ubus(void);
const char* ubus_get_ifname(const char *name);
void ubus_apply_network(void);
bool ubus_has_prefix(const char *name, const char *ifname);
#endif
// Exported module initializers
int init_router(void);
int init_dhcpv6(void);
int init_dhcpv4(void);
int init_ndp(void);
int setup_router_interface(struct interface *iface, bool enable);
int setup_dhcpv6_interface(struct interface *iface, bool enable);
int setup_ndp_interface(struct interface *iface, bool enable);
int setup_dhcpv4_interface(struct interface *iface, bool enable);
void odhcpd_reload(void);
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