/** * Copyright (C) 2012-2013 Steven Barth * * 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 #include #include #include #include #include #ifndef typeof #define typeof __typeof #endif #ifndef container_of #define container_of(ptr, type, member) ( \ (type *)( (char *)ptr - offsetof(type,member) )) #endif #include #include #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 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 { MODE_DISABLED, MODE_SERVER, MODE_RELAY, MODE_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);