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Diffstat (limited to 'src/odhcpd.h')
| -rw-r--r-- | src/odhcpd.h | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/src/odhcpd.h b/src/odhcpd.h new file mode 100644 index 0000000..5608fa9 --- /dev/null +++ b/src/odhcpd.h @@ -0,0 +1,205 @@ +/** + * 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 <net/if.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 RELAYD_MAX_PREFIXES 8 + +#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}}} + + +struct interface; +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); +}; + + +struct odhcpd_ipaddr { + struct in6_addr addr; + uint8_t prefix; + uint32_t preferred; + uint32_t valid; +}; + +enum odhcpd_mode { + RELAYD_DISABLED, + RELAYD_SERVER, + RELAYD_RELAY, + RELAYD_HYBRID +}; + + +struct config { + bool legacy; + char *dhcp_cb; + char *dhcp_statefile; +} 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; + char hostname[]; +}; + + +struct interface { + struct list_head head; + + int ifindex; + char ifname[IF_NAMESIZE]; + char name[IF_NAMESIZE]; + bool inuse; + + // Runtime data + struct uloop_timeout timer_rs; + struct list_head ia_assignments; + struct odhcpd_ipaddr ia_addr[8]; + size_t ia_addr_len; + bool ia_reconf; + + // DHCPv4 + struct odhcpd_event dhcpv4_event; + struct list_head dhcpv4_assignments; + + // Services + enum odhcpd_mode ra; + enum odhcpd_mode dhcpv6; + enum odhcpd_mode ndp; + enum odhcpd_mode dhcpv4; + + // Config + bool external; + bool master; + bool ignore; + bool always_rewrite_dns; + bool deprecate_ula_if_public_avail; + bool ra_not_onlink; + bool no_dynamic_dhcp; + + int learn_routes; + int default_router; + int managed; + int route_preference; + + // DHCPv4 + struct in_addr dhcpv4_start; + struct in_addr dhcpv4_end; + 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; + + char* static_ndp; + size_t static_ndp_len; + + char *upstream; + size_t upstream_len; +}; + +extern struct list_head interfaces; + +#define RELAYD_MANAGED_MFLAG 1 +#define RELAYD_MANAGED_NO_AFLAG 2 + + +// Exported main functions +int odhcpd_open_rtnl(void); +int odhcpd_register(struct odhcpd_event *event); + +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, + struct odhcpd_ipaddr *addrs, size_t cnt); +struct interface* odhcpd_get_interface_by_name(const char *name); +int odhcpd_get_interface_mtu(const char *ifname); +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); +void odhcpd_urandom(void *data, size_t len); +void odhcpd_setup_route(const struct in6_addr *addr, int prefixlen, + const struct interface *iface, const struct in6_addr *gw, 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 config_parse_interface(struct blob_attr *b, const char *iname); + +const char* ubus_get_ifname(const char *name); +void ubus_apply_network(void); + + +// Exported module initializers +int init_router(void); +int init_dhcpv6(void); +int init_dhcpv4(void); +int init_ndp(void); +int init_ubus(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); |