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-rw-r--r--nhrpd/nhrpd.h532
1 files changed, 532 insertions, 0 deletions
diff --git a/nhrpd/nhrpd.h b/nhrpd/nhrpd.h
new file mode 100644
index 0000000..1421f0f
--- /dev/null
+++ b/nhrpd/nhrpd.h
@@ -0,0 +1,532 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* NHRP daemon internal structures and function prototypes
+ * Copyright (c) 2014-2015 Timo Teräs
+ */
+
+#ifndef NHRPD_H
+#define NHRPD_H
+
+#include "zbuf.h"
+#include "zclient.h"
+#include "debug.h"
+#include "memory.h"
+#include "resolver.h"
+
+DECLARE_MGROUP(NHRPD);
+
+#define NHRPD_DEFAULT_HOLDTIME 7200
+
+#define NHRP_VTY_PORT 2610
+#define NHRP_DEFAULT_CONFIG "nhrpd.conf"
+
+extern struct event_loop *master;
+
+enum { NHRP_OK = 0,
+ NHRP_ERR_FAIL,
+ NHRP_ERR_NO_MEMORY,
+ NHRP_ERR_UNSUPPORTED_INTERFACE,
+ NHRP_ERR_NHRP_NOT_ENABLED,
+ NHRP_ERR_ENTRY_EXISTS,
+ NHRP_ERR_ENTRY_NOT_FOUND,
+ NHRP_ERR_PROTOCOL_ADDRESS_MISMATCH,
+ __NHRP_ERR_MAX };
+#define NHRP_ERR_MAX (__NHRP_ERR_MAX - 1)
+
+struct notifier_block;
+
+typedef void (*notifier_fn_t)(struct notifier_block *, unsigned long);
+
+PREDECL_DLIST(notifier_list);
+
+struct notifier_block {
+ struct notifier_list_item notifier_entry;
+ notifier_fn_t action;
+};
+
+DECLARE_DLIST(notifier_list, struct notifier_block, notifier_entry);
+
+struct notifier_list {
+ struct notifier_list_head head;
+};
+
+#define NOTIFIER_LIST_INITIALIZER(l) \
+ { \
+ .head = INIT_DLIST((l)->head) \
+ }
+
+static inline void notifier_init(struct notifier_list *l)
+{
+ notifier_list_init(&l->head);
+}
+
+static inline void notifier_add(struct notifier_block *n,
+ struct notifier_list *l, notifier_fn_t action)
+{
+ n->action = action;
+ notifier_list_add_tail(&l->head, n);
+}
+
+static inline void notifier_del(struct notifier_block *n,
+ struct notifier_list *l)
+{
+ notifier_list_del(&l->head, n);
+}
+
+static inline void notifier_call(struct notifier_list *l, int cmd)
+{
+ struct notifier_block *n;
+
+ frr_each_safe (notifier_list, &l->head, n)
+ n->action(n, cmd);
+}
+
+static inline int notifier_active(struct notifier_list *l)
+{
+ return notifier_list_count(&l->head) > 0;
+}
+
+extern struct hash *nhrp_gre_list;
+
+void nhrp_zebra_init(void);
+void nhrp_zebra_terminate(void);
+void nhrp_send_zebra_configure_arp(struct interface *ifp, int family);
+void nhrp_send_zebra_nbr(union sockunion *in,
+ union sockunion *out,
+ struct interface *ifp);
+
+void nhrp_send_zebra_gre_source_set(struct interface *ifp,
+ unsigned int link_idx,
+ vrf_id_t link_vrf_id);
+
+extern int nhrp_send_zebra_gre_request(struct interface *ifp);
+extern struct nhrp_gre_info *nhrp_gre_info_alloc(struct nhrp_gre_info *p);
+
+struct zbuf;
+struct nhrp_vc;
+struct nhrp_cache;
+struct nhrp_nhs;
+struct nhrp_interface;
+
+#define MAX_ID_LENGTH 64
+#define MAX_CERT_LENGTH 2048
+
+enum nhrp_notify_type {
+ NOTIFY_INTERFACE_UP,
+ NOTIFY_INTERFACE_DOWN,
+ NOTIFY_INTERFACE_CHANGED,
+ NOTIFY_INTERFACE_ADDRESS_CHANGED,
+ NOTIFY_INTERFACE_NBMA_CHANGED,
+ NOTIFY_INTERFACE_MTU_CHANGED,
+ NOTIFY_INTERFACE_IPSEC_CHANGED,
+
+ NOTIFY_VC_IPSEC_CHANGED,
+ NOTIFY_VC_IPSEC_UPDATE_NBMA,
+
+ NOTIFY_PEER_UP,
+ NOTIFY_PEER_DOWN,
+ NOTIFY_PEER_IFCONFIG_CHANGED,
+ NOTIFY_PEER_MTU_CHANGED,
+ NOTIFY_PEER_NBMA_CHANGING,
+
+ NOTIFY_CACHE_UP,
+ NOTIFY_CACHE_DOWN,
+ NOTIFY_CACHE_DELETE,
+ NOTIFY_CACHE_USED,
+ NOTIFY_CACHE_BINDING_CHANGE,
+};
+
+struct nhrp_vc {
+ struct notifier_list notifier_list;
+ uint32_t ipsec;
+ uint32_t ike_uniqueid;
+ uint8_t updating;
+ uint8_t abort_migration;
+
+ struct nhrp_vc_peer {
+ union sockunion nbma;
+ char id[MAX_ID_LENGTH];
+ uint16_t certlen;
+ uint8_t cert[MAX_CERT_LENGTH];
+ } local, remote;
+};
+
+enum nhrp_route_type {
+ NHRP_ROUTE_BLACKHOLE,
+ NHRP_ROUTE_LOCAL,
+ NHRP_ROUTE_NBMA_NEXTHOP,
+ NHRP_ROUTE_OFF_NBMA,
+};
+
+struct nhrp_peer {
+ unsigned int ref;
+ unsigned online : 1;
+ unsigned requested : 1;
+ unsigned fallback_requested : 1;
+ unsigned prio : 1;
+ struct notifier_list notifier_list;
+ struct interface *ifp;
+ struct nhrp_vc *vc;
+ struct event *t_fallback;
+ struct notifier_block vc_notifier, ifp_notifier;
+ struct event *t_timer;
+};
+
+struct nhrp_packet_parser {
+ struct interface *ifp;
+ struct nhrp_afi_data *if_ad;
+ struct nhrp_peer *peer;
+ struct zbuf *pkt;
+ struct zbuf payload;
+ struct zbuf extensions;
+ struct nhrp_packet_header *hdr;
+ enum nhrp_route_type route_type;
+ struct prefix route_prefix;
+ union sockunion src_nbma, src_proto, dst_proto;
+};
+
+struct nhrp_reqid_pool {
+ struct hash *reqid_hash;
+ uint32_t next_request_id;
+};
+
+struct nhrp_reqid {
+ uint32_t request_id;
+ void (*cb)(struct nhrp_reqid *, void *);
+};
+
+extern struct nhrp_reqid_pool nhrp_packet_reqid;
+extern struct nhrp_reqid_pool nhrp_event_reqid;
+
+enum nhrp_cache_type {
+ NHRP_CACHE_INVALID = 0,
+ NHRP_CACHE_INCOMPLETE,
+ NHRP_CACHE_NEGATIVE,
+ NHRP_CACHE_CACHED,
+ NHRP_CACHE_DYNAMIC,
+ NHRP_CACHE_NHS,
+ NHRP_CACHE_STATIC,
+ NHRP_CACHE_LOCAL,
+ NHRP_CACHE_NUM_TYPES
+};
+
+extern const char *const nhrp_cache_type_str[];
+extern unsigned long nhrp_cache_counts[NHRP_CACHE_NUM_TYPES];
+
+struct nhrp_cache_config {
+ struct interface *ifp;
+ union sockunion remote_addr;
+ enum nhrp_cache_type type;
+ union sockunion nbma;
+};
+
+struct nhrp_cache {
+ struct interface *ifp;
+ union sockunion remote_addr;
+
+ unsigned map : 1;
+ unsigned used : 1;
+ unsigned route_installed : 1;
+ unsigned nhrp_route_installed : 1;
+
+ struct notifier_block peer_notifier;
+ struct notifier_block newpeer_notifier;
+ struct notifier_list notifier_list;
+ struct nhrp_reqid eventid;
+ struct event *t_timeout;
+ struct event *t_auth;
+
+ struct {
+ enum nhrp_cache_type type;
+ union sockunion remote_nbma_natoa;
+ union sockunion remote_nbma_claimed;
+ struct nhrp_peer *peer;
+ time_t expires;
+ uint32_t mtu;
+ int holding_time;
+ } cur, new;
+};
+
+struct nhrp_shortcut {
+ struct prefix *p;
+ union sockunion addr;
+
+ struct nhrp_reqid reqid;
+ struct event *t_timer;
+
+ enum nhrp_cache_type type;
+ unsigned int holding_time;
+ unsigned route_installed : 1;
+ unsigned expiring : 1;
+
+ struct nhrp_cache *cache;
+ struct notifier_block cache_notifier;
+};
+
+PREDECL_DLIST(nhrp_nhslist);
+PREDECL_DLIST(nhrp_mcastlist);
+PREDECL_DLIST(nhrp_reglist);
+
+struct nhrp_nhs {
+ struct interface *ifp;
+ struct nhrp_nhslist_item nhslist_entry;
+
+ unsigned hub : 1;
+ afi_t afi;
+ union sockunion proto_addr;
+ const char *nbma_fqdn; /* IP-address or FQDN */
+
+ struct event *t_resolve;
+ struct resolver_query dns_resolve;
+ struct nhrp_reglist_head reglist_head;
+};
+
+DECLARE_DLIST(nhrp_nhslist, struct nhrp_nhs, nhslist_entry);
+
+struct nhrp_multicast {
+ struct interface *ifp;
+ struct nhrp_mcastlist_item mcastlist_entry;
+ afi_t afi;
+ union sockunion nbma_addr; /* IP-address */
+};
+
+DECLARE_DLIST(nhrp_mcastlist, struct nhrp_multicast, mcastlist_entry);
+
+struct nhrp_registration {
+ struct nhrp_reglist_item reglist_entry;
+ struct event *t_register;
+ struct nhrp_nhs *nhs;
+ struct nhrp_reqid reqid;
+ unsigned int timeout;
+ unsigned mark : 1;
+ union sockunion proto_addr;
+ struct nhrp_peer *peer;
+ struct notifier_block peer_notifier;
+};
+
+DECLARE_DLIST(nhrp_reglist, struct nhrp_registration, reglist_entry);
+
+#define NHRP_IFF_SHORTCUT 0x0001
+#define NHRP_IFF_REDIRECT 0x0002
+#define NHRP_IFF_REG_NO_UNIQUE 0x0100
+
+struct nhrp_interface {
+ struct interface *ifp;
+
+ unsigned enabled : 1;
+
+ char *ipsec_profile, *ipsec_fallback_profile, *source;
+ union sockunion nbma;
+ union sockunion nat_nbma;
+ unsigned int link_idx;
+ unsigned int link_vrf_id;
+ uint32_t i_grekey;
+ uint32_t o_grekey;
+
+ struct hash *peer_hash;
+ struct hash *cache_config_hash;
+ struct hash *cache_hash;
+
+ struct notifier_list notifier_list;
+
+ struct interface *nbmaifp;
+ struct notifier_block nbmanifp_notifier;
+
+ struct nhrp_afi_data {
+ unsigned flags;
+ unsigned short configured : 1;
+ union sockunion addr;
+ uint32_t network_id;
+ short configured_mtu;
+ unsigned short mtu;
+ unsigned int holdtime;
+ struct nhrp_nhslist_head nhslist_head;
+ struct nhrp_mcastlist_head mcastlist_head;
+ } afi[AFI_MAX];
+};
+
+struct nhrp_gre_info {
+ ifindex_t ifindex;
+ struct in_addr vtep_ip; /* IFLA_GRE_LOCAL */
+ struct in_addr vtep_ip_remote; /* IFLA_GRE_REMOTE */
+ uint32_t ikey;
+ uint32_t okey;
+ ifindex_t ifindex_link; /* Interface index of interface
+ * linked with GRE
+ */
+ vrf_id_t vrfid_link;
+};
+
+extern struct zebra_privs_t nhrpd_privs;
+
+int sock_open_unix(const char *path);
+
+void nhrp_interface_init(void);
+void nhrp_interface_update(struct interface *ifp);
+void nhrp_interface_update_mtu(struct interface *ifp, afi_t afi);
+void nhrp_interface_update_nbma(struct interface *ifp,
+ struct nhrp_gre_info *gre_info);
+
+int nhrp_interface_add(ZAPI_CALLBACK_ARGS);
+int nhrp_interface_delete(ZAPI_CALLBACK_ARGS);
+int nhrp_interface_up(ZAPI_CALLBACK_ARGS);
+int nhrp_interface_down(ZAPI_CALLBACK_ARGS);
+int nhrp_interface_address_add(ZAPI_CALLBACK_ARGS);
+int nhrp_interface_address_delete(ZAPI_CALLBACK_ARGS);
+int nhrp_neighbor_operation(ZAPI_CALLBACK_ARGS);
+int nhrp_gre_update(ZAPI_CALLBACK_ARGS);
+
+void nhrp_interface_notify_add(struct interface *ifp, struct notifier_block *n,
+ notifier_fn_t fn);
+void nhrp_interface_notify_del(struct interface *ifp, struct notifier_block *n);
+void nhrp_interface_set_protection(struct interface *ifp, const char *profile,
+ const char *fallback_profile);
+void nhrp_interface_set_source(struct interface *ifp, const char *ifname);
+extern int nhrp_ifp_create(struct interface *ifp);
+extern int nhrp_ifp_up(struct interface *ifp);
+extern int nhrp_ifp_down(struct interface *ifp);
+extern int nhrp_ifp_destroy(struct interface *ifp);
+
+int nhrp_nhs_add(struct interface *ifp, afi_t afi, union sockunion *proto_addr,
+ const char *nbma_fqdn);
+int nhrp_nhs_del(struct interface *ifp, afi_t afi, union sockunion *proto_addr,
+ const char *nbma_fqdn);
+int nhrp_nhs_free(struct nhrp_interface *nifp, afi_t afi, struct nhrp_nhs *nhs);
+void nhrp_nhs_terminate(void);
+void nhrp_nhs_foreach(struct interface *ifp, afi_t afi,
+ void (*cb)(struct nhrp_nhs *, struct nhrp_registration *,
+ void *),
+ void *ctx);
+void nhrp_nhs_interface_del(struct interface *ifp);
+
+int nhrp_multicast_add(struct interface *ifp, afi_t afi,
+ union sockunion *nbma_addr);
+int nhrp_multicast_del(struct interface *ifp, afi_t afi,
+ union sockunion *nbma_addr);
+void nhrp_multicast_interface_del(struct interface *ifp);
+void nhrp_multicast_foreach(struct interface *ifp, afi_t afi,
+ void (*cb)(struct nhrp_multicast *, void *),
+ void *ctx);
+void netlink_mcast_set_nflog_group(int nlgroup);
+
+void nhrp_route_update_nhrp(const struct prefix *p, struct interface *ifp);
+void nhrp_route_announce(int add, enum nhrp_cache_type type,
+ const struct prefix *p, struct interface *ifp,
+ const union sockunion *nexthop, uint32_t mtu);
+int nhrp_route_read(ZAPI_CALLBACK_ARGS);
+int nhrp_route_get_nexthop(const union sockunion *addr, struct prefix *p,
+ union sockunion *via, struct interface **ifp);
+enum nhrp_route_type nhrp_route_address(struct interface *in_ifp,
+ union sockunion *addr, struct prefix *p,
+ struct nhrp_peer **peer);
+
+void nhrp_config_init(void);
+
+void nhrp_shortcut_init(void);
+void nhrp_shortcut_terminate(void);
+void nhrp_shortcut_initiate(union sockunion *addr);
+void nhrp_shortcut_foreach(afi_t afi,
+ void (*cb)(struct nhrp_shortcut *, void *),
+ void *ctx);
+void nhrp_shortcut_purge(struct nhrp_shortcut *s, int force);
+void nhrp_shortcut_prefix_change(const struct prefix *p, int deleted);
+
+void nhrp_cache_interface_del(struct interface *ifp);
+void nhrp_cache_config_free(struct nhrp_cache_config *c);
+struct nhrp_cache_config *nhrp_cache_config_get(struct interface *ifp,
+ union sockunion *remote_addr,
+ int create);
+struct nhrp_cache *nhrp_cache_get(struct interface *ifp,
+ union sockunion *remote_addr, int create);
+void nhrp_cache_foreach(struct interface *ifp,
+ void (*cb)(struct nhrp_cache *, void *), void *ctx);
+void nhrp_cache_config_foreach(struct interface *ifp,
+ void (*cb)(struct nhrp_cache_config *, void *), void *ctx);
+void nhrp_cache_set_used(struct nhrp_cache *, int);
+int nhrp_cache_update_binding(struct nhrp_cache *, enum nhrp_cache_type type,
+ int holding_time, struct nhrp_peer *p,
+ uint32_t mtu, union sockunion *nbma_natoa,
+ union sockunion *claimed_nbma);
+void nhrp_cache_notify_add(struct nhrp_cache *c, struct notifier_block *,
+ notifier_fn_t);
+void nhrp_cache_notify_del(struct nhrp_cache *c, struct notifier_block *);
+
+void nhrp_vc_init(void);
+void nhrp_vc_terminate(void);
+struct nhrp_vc *nhrp_vc_get(const union sockunion *src,
+ const union sockunion *dst, int create);
+int nhrp_vc_ipsec_updown(uint32_t child_id, struct nhrp_vc *vc);
+void nhrp_vc_notify_add(struct nhrp_vc *, struct notifier_block *,
+ notifier_fn_t);
+void nhrp_vc_notify_del(struct nhrp_vc *, struct notifier_block *);
+void nhrp_vc_foreach(void (*cb)(struct nhrp_vc *, void *), void *ctx);
+void nhrp_vc_reset(void);
+
+void vici_init(void);
+void vici_terminate(void);
+void vici_terminate_vc_by_profile_name(char *profile_name);
+void vici_terminate_vc_by_ike_id(unsigned int ike_id);
+void vici_request_vc(const char *profile, union sockunion *src,
+ union sockunion *dst, int prio);
+
+extern const char *nhrp_event_socket_path;
+
+void evmgr_init(void);
+void evmgr_terminate(void);
+void evmgr_set_socket(const char *socket);
+void evmgr_notify(const char *name, struct nhrp_cache *c,
+ void (*cb)(struct nhrp_reqid *, void *));
+
+struct nhrp_packet_header *nhrp_packet_push(struct zbuf *zb, uint8_t type,
+ const union sockunion *src_nbma,
+ const union sockunion *src_proto,
+ const union sockunion *dst_proto);
+void nhrp_packet_complete(struct zbuf *zb, struct nhrp_packet_header *hdr);
+uint16_t nhrp_packet_calculate_checksum(const uint8_t *pdu, uint16_t len);
+
+struct nhrp_packet_header *nhrp_packet_pull(struct zbuf *zb,
+ union sockunion *src_nbma,
+ union sockunion *src_proto,
+ union sockunion *dst_proto);
+
+struct nhrp_cie_header *nhrp_cie_push(struct zbuf *zb, uint8_t code,
+ const union sockunion *nbma,
+ const union sockunion *proto);
+struct nhrp_cie_header *nhrp_cie_pull(struct zbuf *zb,
+ struct nhrp_packet_header *hdr,
+ union sockunion *nbma,
+ union sockunion *proto);
+
+struct nhrp_extension_header *
+nhrp_ext_push(struct zbuf *zb, struct nhrp_packet_header *hdr, uint16_t type);
+void nhrp_ext_complete(struct zbuf *zb, struct nhrp_extension_header *ext);
+struct nhrp_extension_header *nhrp_ext_pull(struct zbuf *zb,
+ struct zbuf *payload);
+void nhrp_ext_request(struct zbuf *zb, struct nhrp_packet_header *hdr,
+ struct interface *);
+int nhrp_ext_reply(struct zbuf *zb, struct nhrp_packet_header *hdr,
+ struct interface *ifp, struct nhrp_extension_header *ext,
+ struct zbuf *extpayload);
+
+uint32_t nhrp_reqid_alloc(struct nhrp_reqid_pool *, struct nhrp_reqid *r,
+ void (*cb)(struct nhrp_reqid *, void *));
+void nhrp_reqid_free(struct nhrp_reqid_pool *, struct nhrp_reqid *r);
+struct nhrp_reqid *nhrp_reqid_lookup(struct nhrp_reqid_pool *, uint32_t reqid);
+
+int nhrp_packet_init(void);
+
+void nhrp_peer_interface_del(struct interface *ifp);
+struct nhrp_peer *nhrp_peer_get(struct interface *ifp,
+ const union sockunion *remote_nbma);
+struct nhrp_peer *nhrp_peer_ref(struct nhrp_peer *p);
+void nhrp_peer_unref(struct nhrp_peer *p);
+int nhrp_peer_check(struct nhrp_peer *p, int establish);
+void nhrp_peer_notify_add(struct nhrp_peer *p, struct notifier_block *,
+ notifier_fn_t);
+void nhrp_peer_notify_del(struct nhrp_peer *p, struct notifier_block *);
+void nhrp_peer_recv(struct nhrp_peer *p, struct zbuf *zb);
+void nhrp_peer_send(struct nhrp_peer *p, struct zbuf *zb);
+void nhrp_peer_send_indication(struct interface *ifp, uint16_t, struct zbuf *);
+
+int nhrp_nhs_match_ip(union sockunion *in_ip, struct nhrp_interface *nifp);
+
+#endif
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