ntp/ntpd/ntp_io.c

148  * an indication of the source host and the interface it was received
164 volatile u_long packets_ignored;	/* packets received on wild card interface */
176 endpt *	any_interface;		/* wildcard ipv4 interface */
177 endpt *	any6_interface;		/* wildcard ipv6 interface */
178 endpt *	loopback_interface;	/* loopback ipv4 interface */
283 static	isc_boolean_t	socket_broadcast_enable	 (struct interface *, SOCKET, sockaddr_u *);
289 static	isc_boolean_t	socket_broadcast_disable (struct interface *, sockaddr_u *);
340 static inline int	read_network_packet	(SOCKET, struct interface *, l_fp);
417  *     to bind to to the interface address on NTP_PORT so that
421  *     the interface in order to quickly re-assign the peers to
422  *     new interface in case an interface is deleted (=> gone from system or
428  *   - facilitate updating the internal interface list with respect to
433  *   - mapping of multicast addresses to the interface affected is not always
435  *     the code here currently allocates a separate interface entry for those
438  *     in case of failure the multicast address is bound to an existing interface.
456 	/* update interface every 5 minutes as default */
517  * function to dump the contents of the interface structure
527 	printf("Dumping interface: %p\n", itf);
728  * interface list enumerator - visitor pattern
744  * do standard initialization of interface structure
759  * create new interface structure initialize from
763 static struct interface *
765 	struct interface *interface
768 	struct interface *	iface;
772 	if (NULL == interface)
775 		memcpy(iface, interface, sizeof(*iface));
777 	/* count every new instance of an interface in the system */
783 		msyslog(LOG_EMERG, "cannot register interface with IO engine -- will exit now");
792  * return interface storage into free memory pool
807  * link interface into list of known interfaces
864 	 * interface, and some are link- or site-local, do not multicast
870 	 * prefix on the same network interface, multicast from one,
979  * remove interface from known interface list and clean up
1010 			"Deleting interface #%d %s, %s#%d, interface stats: received=%ld, sent=%ld, dropped=%ld, active_time=%ld secs",
1028 			"stop listening for broadcasts to %s on interface #%d %s",
1043 	/* remove restrict interface entry */
1076 	struct interface *	wildif;
1089 	 * create pseudo-interface with wildcard IPv6 address
1100 		/* check for interface/nic rules affecting the wildcard */
1135 	 * create pseudo-interface with wildcard IPv4 address
1144 		/* check for interface/nic rules affecting the wildcard */
1193 	const char *	if_name,	/* interface name or numeric address */
1267 	DPRINTF(4, ("interface_action: interface %s ",
1274 	 * Find any matching NIC rule from --interface / -I or ntp.conf
1275 	 * interface/nic rules.
1340 				DPRINTF(4, ("interface name match - %s\n",
1370 	 * Check for "virtual IP" (colon in the interface name) after
1371 	 * the rules so that "ntpd --interface eth0:1 -novirtualips"
1382 	 * If there are no --interface/-I command-line options and no
1383 	 * interface/nic rules in ntp.conf, the default action is to
1386 	 * every default with no interface listen configuration, and
1483 	struct interface * interface
1487 	if (interface->fd != INVALID_SOCKET) {
1488 		int bcast = (interface->flags & INT_BCASTXMIT) != 0;
1492 			socket_broadcast_disable(interface, &interface->sin);
1494 		close_and_delete_fd_from_list(interface->fd);
1498 		interface->fd = open_socket(&interface->sin,
1499 					    bcast, 0, interface);
1504 		interface->last_ttl = 0;
1505 		return (interface->fd != INVALID_SOCKET);
1509 	return (interface->fd != INVALID_SOCKET);
1534 	msyslog(LOG_DEBUG, "new interface(s) found: waking up resolver");
1594 	struct interface *any;
1690  *	attempt to create a new interface entry
1694  *   if interface does not match configuration phase (not seen in phase 1):
1695  *	remove interface from known interface list
1696  *	forall peers associated with this interface
1697  *         disconnect peer from this interface
1738 	 * Toggle system interface scan phase to find untouched
1769 		 * Check if and how we are going to use the interface.
1775 			DPRINTF(4, ("ignoring interface %s (%s) - by nic rules\n",
1780 			DPRINTF(4, ("listen interface %s (%s) - by nic rules\n",
1786 			DPRINTF(4, ("drop on interface %s (%s) - by nic rules\n",
1794 			DPRINTF(4, ("skipping interface %s (%s) - DOWN\n",
1820 		 * (interface name, ip-address).
1826 			 * found existing and up to date interface -
1832 				 * the interface name shows up again if
1843 				/* name collision - rename interface */
1855 				 * for the interface address. This is
1857 				 * for an interface that shares its
1866 				 * filtering via interface name is
1871 				 * interface address where the conflict
1891 			 * our interface list.  If refreshing failed we
1892 			 * will delete the interface structure in phase
1893 			 * 2 as the interface was not marked current.
1915 					"failed to init interface for address %s",
1932 		 * if phase does not match sys_phase this interface was
1933 		 * not enumerated during the last interface scan - so it
1935 		 * originate from interface enumeration (INT_WILDCARD,
1957 		 * a loopback interface
1990 		/* Find remote address that was linked to this interface */
2012  * create_sockets - create a socket for each interface plus a default
2046  * create_interface - create a new interface for a given prototype
2049 static struct interface *
2052 	struct interface *	protot
2064 	/* build an interface */
2100 	 * loopback interface of the appropriate class
2107 	 * put into our interface list
2228 	struct interface *	iface,
2245 	struct interface *	iface,
2254 		/* if this interface can support broadcast, set SO_BROADCAST */
2279 	struct interface *	iface,
2339  * Multicast servers need to set the appropriate Multicast interface
2340  * socket option in order for it to know which interface to use for
2345 	struct interface *	iface,
2450 		 * interface index from the scope id. Don't do this
2462 				"setsockopt IPV6_JOIN_GROUP failed: %m on socket %d, addr %s for interface %u (%s)",
2467 		DPRINTF(4, ("Added IPv6 multicast group on socket %d, addr %s for interface %u (%s)\n",
2490 	struct interface *	iface,
2529 		 * interface index from the scope id.  Don't do this
2567 	struct interface *	interf;
2584 		/* Need a broadcast-capable interface */
2609 		 * broadcast on the interface address
2615 				"Listen for broadcasts to %s on interface #%d %s",
2639 				"failed to listen for broadcasts to %s on interface #%d %s",
2676 				"stop listening for broadcasts to %s on interface #%d %s",
2739 		/* bind failed, re-use wildcard interface */
2754 				"multicast address %s using wildcard interface #%d %s",
2890 	 * number on each interface according to turn_off_reuse.
3083 	struct interface *	ep,
3108 		DPRINTF(2, ("%ssendpkt(dst=%s, ttl=%d, len=%d): no interface - IGNORED\n",
3209  * Routine to read the refclock packets for a specific interface
3399  * Routine to read the network NTP packets for a specific interface
3406 	struct interface *	itf,
3492 		msyslog(LOG_ERR, "recvfrom(%s) fd=%d: refclock srcadr on a network interface!",
3844  * find an interface suitable for the src address
3860 	 * Initialize the peer structure and dance the interface jig.
3862 	 * squaredance around the interface list looking for a buddy. If
3863 	 * the dance peters out, there is always the wildcard interface.
3873 			DPRINTF(4, ("Found *-cast interface %s for address %s\n",
3885 	 * it.  For unicast, we get to find the interface when dstadr is
3908  * findinterface - find local interface corresponding to address
3920 		DPRINTF(4, ("Found no interface for address %s - returning wildcard\n",
3925 		DPRINTF(4, ("Found interface #%d %s for address %s\n",
3932  * findlocalinterface - find local interface corresponding to addr,
3960 	DPRINTF(4, ("Finding interface for addr %s in list of addresses\n",
3968 	 * If we are looking for broadcast interface we need to set this
4011 	/* Don't use an interface which will ignore replies */
4022  * If there are -I/--interface or -L/novirtualips command-line options,
4023  * or "nic" or "interface" rules in ntp.conf, findlocalinterface() may
4166  * fetch an interface structure the matches the
4187  * findbcastinter - find broadcast interface corresponding to address
4198 	DPRINTF(4, ("Finding broadcast/multicast interface for addr %s in list of addresses\n",
4204 		DPRINTF(4, ("Easily found bcast-/mcast- interface index #%d %s\n",
4233 		 * this interface is one...
4240 			 * an interface to use for link-local multicast
4277 		DPRINTF(4, ("No bcast interface found for %s\n",
4281 		DPRINTF(4, ("Found bcast-/mcast- interface index #%d %s\n",
4542 		DPRINTF(4, ("Deleted addr %s for interface #%d %s from list of addresses\n",
4550 static struct interface *
4722 			 * if an interface goes up and down or routing
4725 			DPRINTF(3, ("routing message op = %d: scheduling interface update\n",
4760 			"unable to open routing socket (%m) - using polled interface update");
4774 			"bind failed on routing socket (%m) - using polled interface update");
4790 		"Listening on routing socket on fd #%d for interface updates",