1 /* 2 * xfrd-notify.h - notify sending routines. 3 * 4 * Copyright (c) 2006, NLnet Labs. All rights reserved. 5 * 6 * See LICENSE for the license. 7 * 8 */ 9 10 #ifndef XFRD_NOTIFY_H 11 #define XFRD_NOTIFY_H 12 13 #ifndef USE_MINI_EVENT 14 # ifdef HAVE_EVENT_H 15 # include <event.h> 16 # else 17 # include <event2/event.h> 18 # include "event2/event_struct.h" 19 # include "event2/event_compat.h" 20 # endif 21 #else 22 # include "mini_event.h" 23 #endif 24 #include "tsig.h" 25 #include "rbtree.h" 26 27 struct nsd; 28 struct region; 29 struct xfrd_zone; 30 struct zone_options; 31 struct zone; 32 struct xfrd_soa; 33 struct acl_options; 34 struct xfrd_state; 35 36 /** number of concurrent notify packets in flight */ 37 #define NOTIFY_CONCURRENT_MAX 16 38 39 /** notify packet info */ 40 struct notify_pkt { 41 struct acl_options* dest; /* target, NULL if entry not in use */ 42 uint8_t notify_retry; /* how manieth retry in sending to current */ 43 uint16_t notify_query_id; 44 time_t send_time; 45 }; 46 47 /** 48 * This struct keeps track of outbound notifies for a zone. 49 */ 50 struct notify_zone { 51 rbnode_type node; 52 /* name of the zone */ 53 const dname_type* apex; 54 const char* apex_str; 55 56 tsig_record_type notify_tsig; /* tsig state for notify */ 57 struct zone_options* options; 58 struct xfrd_soa *current_soa; /* current SOA in NSD */ 59 60 /* notify sending handler */ 61 /* Not saved on disk (i.e. kill of daemon stops notifies) */ 62 int notify_send_enable; 63 struct event notify_send_handler; 64 int notify_send6_enable; 65 struct event notify_send6_handler; 66 struct timeval notify_timeout; 67 struct acl_options* notify_current; /* current slave to notify */ 68 uint8_t notify_restart; /* restart notify after repattern */ 69 struct notify_pkt pkts[NOTIFY_CONCURRENT_MAX]; 70 int notify_pkt_count; /* number of entries nonNULL in pkts */ 71 72 /* is this notify waiting for a socket? */ 73 uint8_t is_waiting; 74 /* the double linked waiting list for the udp sockets */ 75 struct notify_zone* waiting_next; 76 struct notify_zone* waiting_prev; 77 } ATTR_PACKED; 78 79 /* initialise outgoing notifies */ 80 void init_notify_send(rbtree_type* tree, region_type* region, 81 struct zone_options* options); 82 /* delete notify zone */ 83 void xfrd_del_notify(struct xfrd_state* xfrd, const dname_type* dname); 84 85 /* send notifications to all in the notify list */ 86 void xfrd_send_notify(rbtree_type* tree, const struct dname* apex, 87 struct xfrd_soa* new_soa); 88 /* start notifications, if not started already (does not clobber SOA) */ 89 void xfrd_notify_start(struct notify_zone* zone, struct xfrd_state* xfrd); 90 91 /* handle soa update notify for a master zone. newsoa can be NULL. 92 Makes sure that the soa (serial) has changed. Or drops notify. */ 93 void notify_handle_master_zone_soainfo(rbtree_type* tree, 94 const dname_type* apex, struct xfrd_soa* new_soa); 95 96 /* close fds in use for notification sending */ 97 void close_notify_fds(rbtree_type* tree); 98 /* stop send of notify */ 99 void notify_disable(struct notify_zone* zone); 100 101 #endif /* XFRD_NOTIFY_H */ 102