usr.lib/in.dhcpd/dhcp.c

91  * We don't explicitly delete entries from the offer cache. We let them time
96  * The offer cache (and any database records cached in select_offer()) will
98  * SIGHUP flushes the offer cache, allowing management tools to inform the
214 	 * The test below checks whether the offer has expired,
226 		 * IP address to another client, so use the offer-cached record.
664 			 * an offer, and clear it if we did. If offer
702 		 * If the offer expires before the client got around to
757 		 * created during the offer.
1848  * Checks whether an offer ip address in the per net inet address
1866  * Adds or updates an offer to the per client data structure. The client
1868  * by offer address in the itable hash table, which is used to reserve the
1872  * This implementation does not consider the fact that an offer can be
1876  * client will eventually REQUEST the last offer we have sent out
1878  * we always update the same offer cache entry so its ifp is always
1885  * reservep - new offer address (expected in network order).
1896 	boolean_t	offer = B_FALSE;
1911 	/* Determine the offer address. */
1918 		    "Neither offer IP nor IP to reserve present\n");
1923 	/* If updating, release the old offer address. */
1925 		offer = B_TRUE;
1930 			offer = B_TRUE;
1938 	/* Prepare to insert pcd into the offer hash table. */
1949 				dhcpmsg(LOG_WARNING, "Duplicate offer of %1$s "
1966 	if (offer) {
1974 			dhcpmsg(LOG_INFO, "Reserved offer: %s\n",
1978 			dhcpmsg(LOG_INFO, "Updated offer: %s\n",
1982 			dhcpmsg(LOG_INFO, "Added offer: %s\n",
1991  * Deletes an offer.
1994  * expired - has offer expired, or been purged
2008 				dhcpmsg(LOG_INFO, "Freeing offer: %s\n",
2012 				dhcpmsg(LOG_INFO, "Purging offer: %s\n",
2018 		 * The offer cache ensures that recently granted offer
2032 		/* Prepare to delete pcd from the offer hash table. */
2053  * currently in use, by reserving the address in the offer cache. Database
2128 	 *  Check the offer list and table entry.
2164 		 * for offer expiration (which invalidates the cache).
2316 		 * for offer expiration (which invalidates the cache).
2502  * network and neither currently leased nor currently under offer to another
2515 	 * first, check the ICMP list or offer list.
2571  * neither currently leased nor currently under offer to a client.