iof-bird-daemon / proto / rpki / rpki.c @ 62e64905
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/*
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* BIRD -- The Resource Public Key Infrastructure (RPKI) to Router Protocol
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*
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* (c) 2015 CZ.NIC
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* (c) 2015 Pavel Tvrdik <pawel.tvrdik@gmail.com>
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*
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* Using RTRlib: http://rpki.realmv6.org/
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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/**
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* DOC: RPKI To Router (RPKI-RTR)
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*
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* The RPKI-RTR protocol is implemented in several files: |rpki.c| containing
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* the routes handling, protocol logic, timer events, cache connection,
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* reconfiguration, configuration and protocol glue with BIRD core, |packets.c|
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* containing the RPKI packets handling and finally all transports files:
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* |transport.c|, |tcp_transport.c| and |ssh_transport.c|.
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*
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* The |transport.c| is a middle layer and interface for each specific
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* transport. Transport is a way how to wrap a communication with a cache
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* server. There is supported an unprotected TCP transport and an encrypted
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* SSHv2 transport. The SSH transport requires LibSSH library. LibSSH is
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* loading dynamically using |dlopen()| function. SSH support is integrated in
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* |sysdep/unix/io.c|. Each transport must implement an initialization
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* function, an open function and a socket identification function. That's all.
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*
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* This implementation is based on the RTRlib (http://rpki.realmv6.org/). The
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* BIRD takes over files |packets.c|, |rtr.c| (inside |rpki.c|), |transport.c|,
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* |tcp_transport.c| and |ssh_transport.c| from RTRlib.
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*
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* A RPKI-RTR connection is described by a structure &rpki_cache. The main
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* logic is located in |rpki_cache_change_state()| function. There is a state
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* machine. The standard starting state flow looks like |Down| ~> |Connecting|
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* ~> |Sync-Start| ~> |Sync-Running| ~> |Established| and then the last three
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* states are periodically repeated.
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*
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* |Connecting| state establishes the transport connection. The state from a
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* call |rpki_cache_change_state(CONNECTING)| to a call |rpki_connected_hook()|
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*
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* |Sync-Start| state starts with sending |Reset Query| or |Serial Query| and
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* then waits for |Cache Response|. The state from |rpki_connected_hook()| to
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* |rpki_handle_cache_response_pdu()|
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*
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* During |Sync-Running| BIRD receives data with IPv4/IPv6 Prefixes from cache
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* server. The state starts from |rpki_handle_cache_response_pdu()| and ends
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* in |rpki_handle_end_of_data_pdu()|.
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*
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* |Established| state means that BIRD has synced all data with cache server.
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* Schedules a refresh timer event that invokes |Sync-Start|. Schedules Expire
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* timer event and stops a Retry timer event.
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*
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* |Transport Error| state means that we have some troubles with a network
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* connection. We cannot connect to a cache server or we wait too long for some
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* expected PDU for received - |Cache Response| or |End of Data|. It closes
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* current connection and schedules a Retry timer event.
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*
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* |Fatal Protocol Error| is occurred e.g. by received a bad Session ID. We
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* restart a protocol, so all ROAs are flushed immediately.
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*
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* The RPKI-RTR protocol (RFC 6810 bis) defines configurable refresh, retry and
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* expire intervals. For maintaining a connection are used timer events that
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* are scheduled by |rpki_schedule_next_refresh()|,
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* |rpki_schedule_next_retry()| and |rpki_schedule_next_expire()| functions.
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*
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* A Refresh timer event performs a sync of |Established| connection. So it
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* shifts state to |Sync-Start|. If at the beginning of second call of a
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* refresh event is connection in |Sync-Start| state then we didn't receive a
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* |Cache Response| from a cache server and we invoke |Transport Error| state.
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*
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* A Retry timer event attempts to connect cache server. It is activated after
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* |Transport Error| state and terminated by reaching |Established| state.
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* If cache connection is still connecting to the cache server at the beginning
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* of an event call then the Retry timer event invokes |Transport Error| state.
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*
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* An Expire timer event checks expiration of ROAs. If a last successful sync
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* was more ago than the expire interval then the Expire timer event invokes a
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* protocol restart thereby removes all ROAs learned from that cache server and
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* continue trying to connect to cache server. The Expire event is activated
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* by initial successful loading of ROAs, receiving End of Data PDU.
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*
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* A reconfiguration of cache connection works well without restarting when we
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* change only intervals values.
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*
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* Supported standards:
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* - RFC 6810 - main RPKI-RTR standard
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* - RFC 6810 bis - an explicit timing parameters and protocol version number negotiation
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*/
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#include <stdlib.h> |
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#include <netdb.h> |
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#undef LOCAL_DEBUG
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#include "rpki.h" |
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#include "lib/string.h" |
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#include "nest/cli.h" |
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/* Return values for reconfiguration functions */
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#define NEED_RESTART 0 |
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#define SUCCESSFUL_RECONF 1 |
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static int rpki_open_connection(struct rpki_cache *cache); |
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static void rpki_close_connection(struct rpki_cache *cache); |
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static void rpki_schedule_next_refresh(struct rpki_cache *cache); |
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static void rpki_schedule_next_retry(struct rpki_cache *cache); |
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static void rpki_schedule_next_expire_check(struct rpki_cache *cache); |
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static void rpki_stop_refresh_timer_event(struct rpki_cache *cache); |
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static void rpki_stop_retry_timer_event(struct rpki_cache *cache); |
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static void rpki_stop_expire_timer_event(struct rpki_cache *cache); |
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/*
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* Routes handling
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*/
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void
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rpki_table_add_roa(struct rpki_cache *cache, struct channel *channel, const net_addr_union *pfxr) |
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{ |
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struct rpki_proto *p = cache->p;
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rta a0 = { |
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.src = p->p.main_source, |
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.source = RTS_RPKI, |
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.scope = SCOPE_UNIVERSE, |
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.dest = RTD_NONE, |
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}; |
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rta *a = rta_lookup(&a0); |
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rte *e = rte_get_temp(a); |
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e->pflags = 0;
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rte_update2(channel, &pfxr->n, e, a0.src); |
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} |
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void
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rpki_table_remove_roa(struct rpki_cache *cache, struct channel *channel, const net_addr_union *pfxr) |
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{ |
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struct rpki_proto *p = cache->p;
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rte_update2(channel, &pfxr->n, NULL, p->p.main_source);
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} |
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/*
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* RPKI Protocol Logic
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*/
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static const char *str_cache_states[] = { |
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[RPKI_CS_CONNECTING] = "Connecting",
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[RPKI_CS_ESTABLISHED] = "Established",
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[RPKI_CS_RESET] = "Reseting",
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[RPKI_CS_SYNC_START] = "Sync-Start",
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[RPKI_CS_SYNC_RUNNING] = "Sync-Running",
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[RPKI_CS_FAST_RECONNECT] = "Fast-Reconnect",
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[RPKI_CS_NO_INCR_UPDATE_AVAIL]= "No-Increment-Update-Available",
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[RPKI_CS_ERROR_NO_DATA_AVAIL] = "Cache-Error-No-Data-Available",
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[RPKI_CS_ERROR_FATAL] = "Fatal-Protocol-Error",
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[RPKI_CS_ERROR_TRANSPORT] = "Transport-Error",
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[RPKI_CS_SHUTDOWN] = "Down"
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}; |
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/**
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* rpki_cache_state_to_str - give a text representation of cache state
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* @state: A cache state
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*
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* The function converts logic cache state into string.
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*/
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const char * |
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rpki_cache_state_to_str(enum rpki_cache_state state)
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{ |
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return str_cache_states[state];
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} |
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/**
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* rpki_start_cache - connect to a cache server
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* @cache: RPKI connection instance
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*
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* This function is a high level method to kick up a connection to a cache server.
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*/
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static void |
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rpki_start_cache(struct rpki_cache *cache)
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{ |
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rpki_cache_change_state(cache, RPKI_CS_CONNECTING); |
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} |
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/**
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* rpki_force_restart_proto - force shutdown and start protocol again
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* @p: RPKI protocol instance
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*
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* This function calls shutdown and frees all protocol resources as well.
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* After calling this function should be no operations with protocol data,
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* they could be freed already.
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*/
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static void |
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rpki_force_restart_proto(struct rpki_proto *p)
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{ |
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if (p->cache)
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{ |
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CACHE_DBG(p->cache, "Connection object destroying");
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} |
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/* Sign as freed */
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p->cache = NULL;
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proto_notify_state(&p->p, PS_DOWN); |
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} |
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/**
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* rpki_cache_change_state - check and change cache state
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* @cache: RPKI cache instance
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* @new_state: suggested new state
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*
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* This function makes transitions between internal states.
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* It represents the core of logic management of RPKI protocol.
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* Cannot transit into the same state as cache is in already.
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*/
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void
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rpki_cache_change_state(struct rpki_cache *cache, const enum rpki_cache_state new_state) |
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{ |
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const enum rpki_cache_state old_state = cache->state; |
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if (old_state == new_state)
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return;
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cache->state = new_state; |
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CACHE_TRACE(D_EVENTS, cache, "Changing from %s to %s state", rpki_cache_state_to_str(old_state), rpki_cache_state_to_str(new_state));
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switch (new_state)
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{ |
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case RPKI_CS_CONNECTING:
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{ |
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sock *sk = cache->tr_sock->sk; |
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if (sk == NULL || sk->fd < 0) |
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rpki_open_connection(cache); |
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else
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rpki_cache_change_state(cache, RPKI_CS_SYNC_START); |
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rpki_schedule_next_retry(cache); |
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break;
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} |
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case RPKI_CS_ESTABLISHED:
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rpki_schedule_next_refresh(cache); |
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rpki_schedule_next_expire_check(cache); |
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rpki_stop_retry_timer_event(cache); |
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break;
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case RPKI_CS_RESET:
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/* Resetting cache connection. */
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cache->request_session_id = 1;
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cache->serial_num = 0;
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rpki_cache_change_state(cache, RPKI_CS_SYNC_START); |
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break;
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case RPKI_CS_SYNC_START:
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/* Requesting for receive ROAs from a cache server. */
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if (cache->request_session_id)
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{ |
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/* Send request for Session ID */
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if (rpki_send_reset_query(cache) != RPKI_SUCCESS)
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rpki_cache_change_state(cache, RPKI_CS_ERROR_TRANSPORT); |
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} |
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else
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{ |
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/* We have already a session_id. So send a Serial Query and start an incremental sync */
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if (rpki_send_serial_query(cache) != RPKI_SUCCESS)
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rpki_cache_change_state(cache, RPKI_CS_ERROR_TRANSPORT); |
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} |
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break;
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case RPKI_CS_SYNC_RUNNING:
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/* The state between Cache Response and End of Data. Only waiting for
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* receiving all IP Prefix PDUs and finally a End of Data PDU. */
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break;
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case RPKI_CS_NO_INCR_UPDATE_AVAIL:
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/* Server was unable to answer the last Serial Query and sent Cache Reset. */
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rpki_cache_change_state(cache, RPKI_CS_RESET); |
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break;
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case RPKI_CS_ERROR_NO_DATA_AVAIL:
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/* No validation records are available on the cache server. */
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rpki_cache_change_state(cache, RPKI_CS_RESET); |
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break;
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case RPKI_CS_ERROR_FATAL:
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/* Fatal protocol error occurred. */
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rpki_force_restart_proto(cache->p); |
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break;
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case RPKI_CS_ERROR_TRANSPORT:
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/* Error on the transport socket occurred. */
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rpki_close_connection(cache); |
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rpki_schedule_next_retry(cache); |
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rpki_stop_refresh_timer_event(cache); |
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break;
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case RPKI_CS_FAST_RECONNECT:
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/* Reconnect without any waiting period */
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rpki_close_connection(cache); |
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rpki_cache_change_state(cache, RPKI_CS_CONNECTING); |
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break;
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case RPKI_CS_SHUTDOWN:
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bug("This isn't never really called.");
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break;
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}; |
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} |
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/*
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* RPKI Timer Events
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*/
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static void |
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rpki_schedule_next_refresh(struct rpki_cache *cache)
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{ |
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uint time_to_wait = cache->refresh_interval; |
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CACHE_DBG(cache, "after %u seconds", time_to_wait);
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tm_start(cache->refresh_timer, time_to_wait); |
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} |
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static void |
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rpki_schedule_next_retry(struct rpki_cache *cache)
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{ |
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uint time_to_wait = cache->retry_interval; |
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CACHE_DBG(cache, "after %u seconds", time_to_wait);
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tm_start(cache->retry_timer, time_to_wait); |
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} |
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static void |
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rpki_schedule_next_expire_check(struct rpki_cache *cache)
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{ |
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/* A minimum time to wait is 1 second */
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uint time_to_wait = MAX(((int)cache->expire_interval - (int)(now - cache->last_update)), 1); |
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CACHE_DBG(cache, "after %u seconds", time_to_wait);
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tm_start(cache->expire_timer, time_to_wait); |
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} |
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static void |
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rpki_stop_refresh_timer_event(struct rpki_cache *cache)
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{ |
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CACHE_DBG(cache, "Stop");
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tm_stop(cache->refresh_timer); |
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} |
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static void |
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rpki_stop_retry_timer_event(struct rpki_cache *cache)
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{ |
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CACHE_DBG(cache, "Stop");
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tm_stop(cache->retry_timer); |
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} |
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static void |
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rpki_stop_expire_timer_event(struct rpki_cache *cache)
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{ |
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CACHE_DBG(cache, "Stop");
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tm_stop(cache->expire_timer); |
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} |
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static int |
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rpki_do_we_recv_prefix_pdu_in_last_seconds(struct rpki_cache *cache)
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{ |
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if (cache->last_rx_prefix == 0) |
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return 0; |
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return ((now - cache->last_rx_prefix) <= 2); |
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} |
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/**
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* rpki_refresh_hook - control a scheduling of downloading data from cache server
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* @tm: refresh timer with cache connection instance in data
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*
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* This function is periodically called during &ESTABLISHED or &SYNC* state
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* cache connection. The first refresh schedule is invoked after receiving a
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* |End of Data| PDU and has run by some &ERROR is occurred.
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*/
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static void |
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rpki_refresh_hook(struct timer *tm)
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{ |
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struct rpki_cache *cache = tm->data;
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CACHE_DBG(cache, "%s", rpki_cache_state_to_str(cache->state));
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switch (cache->state)
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{ |
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case RPKI_CS_ESTABLISHED:
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rpki_cache_change_state(cache, RPKI_CS_SYNC_START); |
395 |
break;
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case RPKI_CS_SYNC_START:
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/* We sent Serial/Reset Query in last refresh hook call
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* and didn't receive Cache Response yet. It is probably
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* troubles with network. */
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case RPKI_CS_SYNC_RUNNING:
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/* We sent Serial/Reset Query in last refresh hook call
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* and we got Cache Response but didn't get End-Of-Data yet.
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* It could be a trouble with network or only too long synchronization. */
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if (!rpki_do_we_recv_prefix_pdu_in_last_seconds(cache))
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{ |
407 |
CACHE_TRACE(D_EVENTS, cache, "Sync takes more time than refresh interval %us, resetting connection", cache->refresh_interval);
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408 |
rpki_cache_change_state(cache, RPKI_CS_ERROR_TRANSPORT); |
409 |
} |
410 |
break;
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411 |
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default:
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break;
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} |
415 |
|
416 |
if (cache->state != RPKI_CS_SHUTDOWN && cache->state != RPKI_CS_ERROR_TRANSPORT)
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rpki_schedule_next_refresh(cache); |
418 |
else
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rpki_stop_refresh_timer_event(cache); |
420 |
} |
421 |
|
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/**
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423 |
* rpki_retry_hook - control a scheduling of retrying connection to cache server
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424 |
* @tm: retry timer with cache connection instance in data
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*
|
426 |
* This function is periodically called during &ERROR* state cache connection.
|
427 |
* The first retry schedule is invoked after any &ERROR* state occurred and
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* ends by reaching of &ESTABLISHED state again.
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*/
|
430 |
static void |
431 |
rpki_retry_hook(struct timer *tm)
|
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{ |
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struct rpki_cache *cache = tm->data;
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|
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CACHE_DBG(cache, "%s", rpki_cache_state_to_str(cache->state));
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|
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switch (cache->state)
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{ |
439 |
case RPKI_CS_ESTABLISHED:
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case RPKI_CS_SHUTDOWN:
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break;
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443 |
case RPKI_CS_CONNECTING:
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444 |
case RPKI_CS_SYNC_START:
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case RPKI_CS_SYNC_RUNNING:
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if (!rpki_do_we_recv_prefix_pdu_in_last_seconds(cache))
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{ |
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/* We tried to establish a connection in last retry hook call and haven't done
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* yet. It looks like troubles with network. We are aggressive here. */
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CACHE_TRACE(D_EVENTS, cache, "Sync takes more time than retry interval %us, resetting connection.", cache->retry_interval);
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rpki_cache_change_state(cache, RPKI_CS_ERROR_TRANSPORT); |
452 |
} |
453 |
break;
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454 |
|
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default:
|
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rpki_cache_change_state(cache, RPKI_CS_CONNECTING); |
457 |
break;
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} |
459 |
|
460 |
if (cache->state != RPKI_CS_ESTABLISHED)
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rpki_schedule_next_retry(cache); |
462 |
else
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rpki_stop_retry_timer_event(cache); |
464 |
} |
465 |
|
466 |
/**
|
467 |
* rpki_expire_hook - control a expiration of ROA entries
|
468 |
* @tm: expire timer with cache connection instance in data
|
469 |
*
|
470 |
* This function is scheduled after received a |End of Data| PDU.
|
471 |
* A waiting interval is calculated dynamically by last update.
|
472 |
* If we reach an expiration time then we invoke a restarting
|
473 |
* of the protocol.
|
474 |
*/
|
475 |
static void |
476 |
rpki_expire_hook(struct timer *tm)
|
477 |
{ |
478 |
struct rpki_cache *cache = tm->data;
|
479 |
|
480 |
if (cache->last_update == 0) |
481 |
return;
|
482 |
|
483 |
CACHE_DBG(cache, "%s", rpki_cache_state_to_str(cache->state));
|
484 |
|
485 |
if ((cache->last_update + cache->expire_interval) < now)
|
486 |
{ |
487 |
CACHE_TRACE(D_EVENTS, cache, "All ROAs expired");
|
488 |
rpki_force_restart_proto(cache->p); |
489 |
} |
490 |
else
|
491 |
{ |
492 |
CACHE_DBG(cache, "Remains %d seconds to become ROAs obsolete", (int)cache->expire_interval - (int)(now - cache->last_update)); |
493 |
rpki_schedule_next_expire_check(cache); |
494 |
} |
495 |
} |
496 |
|
497 |
/**
|
498 |
* rpki_check_refresh_interval - check validity of refresh interval value
|
499 |
* @seconds: suggested value
|
500 |
*
|
501 |
* This function validates value and should return |NULL|.
|
502 |
* If the check doesn't pass then returns error message.
|
503 |
*/
|
504 |
const char * |
505 |
rpki_check_refresh_interval(uint seconds) |
506 |
{ |
507 |
if (seconds < 1) |
508 |
return "Minimum allowed refresh interval is 1 second"; |
509 |
if (seconds > 86400) |
510 |
return "Maximum allowed refresh interval is 86400 seconds"; |
511 |
return NULL; |
512 |
} |
513 |
|
514 |
/**
|
515 |
* rpki_check_retry_interval - check validity of retry interval value
|
516 |
* @seconds: suggested value
|
517 |
*
|
518 |
* This function validates value and should return |NULL|.
|
519 |
* If the check doesn't pass then returns error message.
|
520 |
*/
|
521 |
const char * |
522 |
rpki_check_retry_interval(uint seconds) |
523 |
{ |
524 |
if (seconds < 1) |
525 |
return "Minimum allowed retry interval is 1 second"; |
526 |
if (seconds > 7200) |
527 |
return "Maximum allowed retry interval is 7200 seconds"; |
528 |
return NULL; |
529 |
} |
530 |
|
531 |
/**
|
532 |
* rpki_check_expire_interval - check validity of expire interval value
|
533 |
* @seconds: suggested value
|
534 |
*
|
535 |
* This function validates value and should return |NULL|.
|
536 |
* If the check doesn't pass then returns error message.
|
537 |
*/
|
538 |
const char * |
539 |
rpki_check_expire_interval(uint seconds) |
540 |
{ |
541 |
if (seconds < 600) |
542 |
return "Minimum allowed expire interval is 600 seconds"; |
543 |
if (seconds > 172800) |
544 |
return "Maximum allowed expire interval is 172800 seconds"; |
545 |
return NULL; |
546 |
} |
547 |
|
548 |
|
549 |
/*
|
550 |
* RPKI Cache
|
551 |
*/
|
552 |
|
553 |
static struct rpki_cache * |
554 |
rpki_init_cache(struct rpki_proto *p, struct rpki_config *cf) |
555 |
{ |
556 |
pool *pool = rp_new(p->p.pool, cf->hostname); |
557 |
|
558 |
struct rpki_cache *cache = mb_allocz(pool, sizeof(struct rpki_cache)); |
559 |
|
560 |
cache->pool = pool; |
561 |
cache->p = p; |
562 |
|
563 |
cache->state = RPKI_CS_SHUTDOWN; |
564 |
cache->request_session_id = 1;
|
565 |
cache->version = RPKI_MAX_VERSION; |
566 |
|
567 |
cache->refresh_interval = cf->refresh_interval; |
568 |
cache->retry_interval = cf->retry_interval; |
569 |
cache->expire_interval = cf->expire_interval; |
570 |
cache->refresh_timer = tm_new_set(pool, &rpki_refresh_hook, cache, 0, 0); |
571 |
cache->retry_timer = tm_new_set(pool, &rpki_retry_hook, cache, 0, 0); |
572 |
cache->expire_timer = tm_new_set(pool, &rpki_expire_hook, cache, 0, 0); |
573 |
|
574 |
cache->tr_sock = mb_allocz(pool, sizeof(struct rpki_tr_sock)); |
575 |
cache->tr_sock->cache = cache; |
576 |
|
577 |
switch (cf->tr_config.type)
|
578 |
{ |
579 |
case RPKI_TR_TCP: rpki_tr_tcp_init(cache->tr_sock); break; |
580 |
case RPKI_TR_SSH: rpki_tr_ssh_init(cache->tr_sock); break; |
581 |
}; |
582 |
|
583 |
CACHE_DBG(cache, "Connection object created");
|
584 |
|
585 |
return cache;
|
586 |
} |
587 |
|
588 |
/**
|
589 |
* rpki_get_cache_ident - give a text representation of cache server name
|
590 |
* @cache: RPKI connection instance
|
591 |
*
|
592 |
* The function converts cache connection into string.
|
593 |
*/
|
594 |
const char * |
595 |
rpki_get_cache_ident(struct rpki_cache *cache)
|
596 |
{ |
597 |
return rpki_tr_ident(cache->tr_sock);
|
598 |
} |
599 |
|
600 |
static int |
601 |
rpki_open_connection(struct rpki_cache *cache)
|
602 |
{ |
603 |
CACHE_TRACE(D_EVENTS, cache, "Opening a connection");
|
604 |
|
605 |
if (rpki_tr_open(cache->tr_sock) == RPKI_TR_ERROR)
|
606 |
{ |
607 |
rpki_cache_change_state(cache, RPKI_CS_ERROR_TRANSPORT); |
608 |
return RPKI_TR_ERROR;
|
609 |
} |
610 |
|
611 |
return RPKI_TR_SUCCESS;
|
612 |
} |
613 |
|
614 |
static void |
615 |
rpki_close_connection(struct rpki_cache *cache)
|
616 |
{ |
617 |
CACHE_TRACE(D_EVENTS, cache, "Closing a connection");
|
618 |
rpki_tr_close(cache->tr_sock); |
619 |
proto_notify_state(&cache->p->p, PS_START); |
620 |
} |
621 |
|
622 |
static int |
623 |
rpki_shutdown(struct proto *P)
|
624 |
{ |
625 |
struct rpki_proto *p = (void *) P; |
626 |
|
627 |
rpki_force_restart_proto(p); |
628 |
|
629 |
/* Protocol memory pool will be automatically freed */
|
630 |
return PS_DOWN;
|
631 |
} |
632 |
|
633 |
|
634 |
/*
|
635 |
* RPKI Reconfiguration
|
636 |
*/
|
637 |
|
638 |
static int |
639 |
rpki_try_fast_reconnect(struct rpki_cache *cache, struct rpki_config *new, struct rpki_config *old) |
640 |
{ |
641 |
if (cache->state == RPKI_CS_ESTABLISHED)
|
642 |
{ |
643 |
rpki_cache_change_state(cache, RPKI_CS_FAST_RECONNECT); |
644 |
return SUCCESSFUL_RECONF;
|
645 |
} |
646 |
|
647 |
return NEED_RESTART;
|
648 |
} |
649 |
|
650 |
/**
|
651 |
* rpki_reconfigure_cache - a cache reconfiguration
|
652 |
* @p: RPKI protocol instance
|
653 |
* @cache: a cache connection
|
654 |
* @new: new RPKI configuration
|
655 |
* @old: old RPKI configuration
|
656 |
*
|
657 |
* This function reconfigures existing single cache server connection with new
|
658 |
* existing configuration. Generally, a change of time intervals could be
|
659 |
* reconfigured without restarting and all others changes requires a restart of
|
660 |
* protocol. Returns |NEED_TO_RESTART| or |SUCCESSFUL_RECONF|.
|
661 |
*/
|
662 |
static int |
663 |
rpki_reconfigure_cache(struct rpki_proto *p, struct rpki_cache *cache, struct rpki_config *new, struct rpki_config *old) |
664 |
{ |
665 |
u8 try_fast_reconnect = 0;
|
666 |
|
667 |
|
668 |
if (strcmp(old->hostname, new->hostname) != 0) |
669 |
{ |
670 |
CACHE_TRACE(D_EVENTS, cache, "Cache server address changed to %s", new->hostname);
|
671 |
return NEED_RESTART;
|
672 |
} |
673 |
|
674 |
if (old->port != new->port)
|
675 |
{ |
676 |
CACHE_TRACE(D_EVENTS, cache, "Cache server port changed to %u", new->port);
|
677 |
return NEED_RESTART;
|
678 |
} |
679 |
|
680 |
if (old->tr_config.type != new->tr_config.type)
|
681 |
{ |
682 |
CACHE_TRACE(D_EVENTS, cache, "Transport type changed");
|
683 |
return NEED_RESTART;
|
684 |
} |
685 |
else if (new->tr_config.type == RPKI_TR_SSH) |
686 |
{ |
687 |
struct rpki_tr_ssh_config *ssh_old = (void *) old->tr_config.spec; |
688 |
struct rpki_tr_ssh_config *ssh_new = (void *) new->tr_config.spec; |
689 |
if ((strcmp(ssh_old->bird_private_key, ssh_new->bird_private_key) != 0) || |
690 |
(strcmp(ssh_old->cache_public_key, ssh_new->cache_public_key) != 0) ||
|
691 |
(strcmp(ssh_old->user, ssh_new->user) != 0))
|
692 |
{ |
693 |
CACHE_TRACE(D_EVENTS, cache, "Settings of SSH transport configuration changed");
|
694 |
try_fast_reconnect = 1;
|
695 |
} |
696 |
} |
697 |
|
698 |
#define TEST_INTERVAL(name, Name) \
|
699 |
if (cache->name##_interval != new->name##_interval || \ |
700 |
old->keep_##name##_interval != new->keep_##name##_interval) \ |
701 |
{ \ |
702 |
cache->name##_interval = new->name##_interval; \ |
703 |
CACHE_TRACE(D_EVENTS, cache, #Name " interval changed to %u seconds %s", cache->name##_interval, (new->keep_##name##_interval ? "and keep it" : "")); \ |
704 |
try_fast_reconnect = 1; \
|
705 |
} |
706 |
TEST_INTERVAL(refresh, Refresh); |
707 |
TEST_INTERVAL(retry, Retry); |
708 |
TEST_INTERVAL(expire, Expire); |
709 |
#undef TEST_INTERVAL
|
710 |
|
711 |
if (try_fast_reconnect)
|
712 |
return rpki_try_fast_reconnect(cache, new, old);
|
713 |
|
714 |
return SUCCESSFUL_RECONF;
|
715 |
} |
716 |
|
717 |
/**
|
718 |
* rpki_reconfigure - a protocol reconfiguration hook
|
719 |
* @P: a protocol instance
|
720 |
* @CF: a new protocol configuration
|
721 |
*
|
722 |
* This function reconfigures whole protocol.
|
723 |
* It sets new protocol configuration into a protocol structure.
|
724 |
* Returns |NEED_TO_RESTART| or |SUCCESSFUL_RECONF|.
|
725 |
*/
|
726 |
static int |
727 |
rpki_reconfigure(struct proto *P, struct proto_config *CF) |
728 |
{ |
729 |
struct rpki_proto *p = (void *) P; |
730 |
struct rpki_config *new = (void *) CF; |
731 |
struct rpki_config *old = (void *) p->p.cf; |
732 |
struct rpki_cache *cache = p->cache;
|
733 |
|
734 |
if (!proto_configure_channel(&p->p, &p->roa4_channel, proto_cf_find_channel(CF, NET_ROA4)) ||
|
735 |
!proto_configure_channel(&p->p, &p->roa6_channel, proto_cf_find_channel(CF, NET_ROA6))) |
736 |
return NEED_RESTART;
|
737 |
|
738 |
if (rpki_reconfigure_cache(p, cache, new, old) != SUCCESSFUL_RECONF)
|
739 |
return NEED_RESTART;
|
740 |
|
741 |
return SUCCESSFUL_RECONF;
|
742 |
} |
743 |
|
744 |
|
745 |
/*
|
746 |
* RPKI Protocol Glue
|
747 |
*/
|
748 |
|
749 |
static struct proto * |
750 |
rpki_init(struct proto_config *CF)
|
751 |
{ |
752 |
struct proto *P = proto_new(CF);
|
753 |
struct rpki_proto *p = (void *) P; |
754 |
|
755 |
proto_configure_channel(&p->p, &p->roa4_channel, proto_cf_find_channel(CF, NET_ROA4)); |
756 |
proto_configure_channel(&p->p, &p->roa6_channel, proto_cf_find_channel(CF, NET_ROA6)); |
757 |
|
758 |
return P;
|
759 |
} |
760 |
|
761 |
static int |
762 |
rpki_start(struct proto *P)
|
763 |
{ |
764 |
struct rpki_proto *p = (void *) P; |
765 |
struct rpki_config *cf = (void *) P->cf; |
766 |
|
767 |
p->cache = rpki_init_cache(p, cf); |
768 |
rpki_start_cache(p->cache); |
769 |
|
770 |
return PS_START;
|
771 |
} |
772 |
|
773 |
static void |
774 |
rpki_get_status(struct proto *P, byte *buf)
|
775 |
{ |
776 |
struct rpki_proto *p = (struct rpki_proto *) P; |
777 |
|
778 |
if (P->proto_state == PS_DOWN)
|
779 |
{ |
780 |
*buf = 0;
|
781 |
return;
|
782 |
} |
783 |
|
784 |
if (p->cache)
|
785 |
bsprintf(buf, "%s", rpki_cache_state_to_str(p->cache->state));
|
786 |
else
|
787 |
bsprintf(buf, "No cache server configured");
|
788 |
} |
789 |
|
790 |
static void |
791 |
rpki_show_proto_info_timer(const char *name, uint num, timer *t) |
792 |
{ |
793 |
if (t->expires)
|
794 |
cli_msg(-1006, " %-17s %us (remains %us)", name, num, tm_remains(t)); |
795 |
else
|
796 |
cli_msg(-1006, " %-17s ---", name); |
797 |
} |
798 |
|
799 |
static void |
800 |
rpki_show_proto_info(struct proto *P)
|
801 |
{ |
802 |
struct rpki_proto *p = (struct rpki_proto *) P; |
803 |
struct rpki_config *cf = (void *) p->p.cf; |
804 |
struct rpki_cache *cache = p->cache;
|
805 |
|
806 |
if (P->proto_state == PS_DOWN)
|
807 |
return;
|
808 |
|
809 |
if (cache)
|
810 |
{ |
811 |
const char *transport_name = "---"; |
812 |
|
813 |
switch (cf->tr_config.type)
|
814 |
{ |
815 |
case RPKI_TR_SSH: transport_name = "SSHv2"; break; |
816 |
case RPKI_TR_TCP: transport_name = "Unprotected over TCP"; break; |
817 |
}; |
818 |
|
819 |
cli_msg(-1006, " Cache server: %s", rpki_get_cache_ident(cache)); |
820 |
cli_msg(-1006, " Status: %s", rpki_cache_state_to_str(cache->state)); |
821 |
cli_msg(-1006, " Transport: %s", transport_name); |
822 |
cli_msg(-1006, " Protocol version: %u", cache->version); |
823 |
|
824 |
if (cache->request_session_id)
|
825 |
cli_msg(-1006, " Session ID: ---"); |
826 |
else
|
827 |
cli_msg(-1006, " Session ID: %u", cache->session_id); |
828 |
|
829 |
if (cache->last_update)
|
830 |
{ |
831 |
cli_msg(-1006, " Serial number: %u", cache->serial_num); |
832 |
cli_msg(-1006, " Last update: before %us", now - cache->last_update); |
833 |
} |
834 |
else
|
835 |
{ |
836 |
cli_msg(-1006, " Serial number: ---"); |
837 |
cli_msg(-1006, " Last update: ---"); |
838 |
} |
839 |
|
840 |
rpki_show_proto_info_timer("Refresh interval:", cache->refresh_interval, cache->refresh_timer);
|
841 |
rpki_show_proto_info_timer("Retry interval:", cache->retry_interval, cache->retry_timer);
|
842 |
rpki_show_proto_info_timer("Expire interval:", cache->expire_interval, cache->expire_timer);
|
843 |
|
844 |
if (p->roa4_channel)
|
845 |
channel_show_info(p->roa4_channel); |
846 |
else
|
847 |
cli_msg(-1006, " No roa4 channel"); |
848 |
|
849 |
if (p->roa6_channel)
|
850 |
channel_show_info(p->roa6_channel); |
851 |
else
|
852 |
cli_msg(-1006, " No roa6 channel"); |
853 |
} |
854 |
} |
855 |
|
856 |
|
857 |
/*
|
858 |
* RPKI Protocol Configuration
|
859 |
*/
|
860 |
|
861 |
/**
|
862 |
* rpki_check_config - check and complete configuration of RPKI protocol
|
863 |
* @cf: RPKI configuration
|
864 |
*
|
865 |
* This function is called at the end of parsing RPKI protocol configuration.
|
866 |
*/
|
867 |
void
|
868 |
rpki_check_config(struct rpki_config *cf)
|
869 |
{ |
870 |
/* Do not check templates at all */
|
871 |
if (cf->c.class == SYM_TEMPLATE)
|
872 |
return;
|
873 |
|
874 |
if (ipa_zero(cf->ip) && cf->hostname == NULL) |
875 |
cf_error("IP address or hostname of cache server must be set");
|
876 |
|
877 |
/* Set default transport type */
|
878 |
if (cf->tr_config.spec == NULL) |
879 |
{ |
880 |
cf->tr_config.spec = cfg_allocz(sizeof(struct rpki_tr_tcp_config)); |
881 |
cf->tr_config.type = RPKI_TR_TCP; |
882 |
} |
883 |
|
884 |
if (cf->port == 0) |
885 |
{ |
886 |
/* Set default port numbers */
|
887 |
switch (cf->tr_config.type)
|
888 |
{ |
889 |
case RPKI_TR_SSH:
|
890 |
cf->port = RPKI_SSH_PORT; |
891 |
break;
|
892 |
default:
|
893 |
cf->port = RPKI_TCP_PORT; |
894 |
} |
895 |
} |
896 |
} |
897 |
|
898 |
static void |
899 |
rpki_postconfig(struct proto_config *CF)
|
900 |
{ |
901 |
/* Define default channel */
|
902 |
if (EMPTY_LIST(CF->channels))
|
903 |
channel_config_new(NULL, CF->net_type, CF);
|
904 |
} |
905 |
|
906 |
static void |
907 |
rpki_copy_config(struct proto_config *dest, struct proto_config *src) |
908 |
{ |
909 |
/* Just a shallow copy */
|
910 |
} |
911 |
|
912 |
struct protocol proto_rpki = {
|
913 |
.name = "RPKI",
|
914 |
.template = "rpki%d",
|
915 |
.preference = DEF_PREF_RPKI, |
916 |
.proto_size = sizeof(struct rpki_proto), |
917 |
.config_size = sizeof(struct rpki_config), |
918 |
.init = rpki_init, |
919 |
.start = rpki_start, |
920 |
.postconfig = rpki_postconfig, |
921 |
.channel_mask = (NB_ROA4 | NB_ROA6), |
922 |
.show_proto_info = rpki_show_proto_info, |
923 |
.shutdown = rpki_shutdown, |
924 |
.copy_config = rpki_copy_config, |
925 |
.reconfigure = rpki_reconfigure, |
926 |
.get_status = rpki_get_status, |
927 |
}; |