1#ifndef foointernalhfoo 2#define foointernalhfoo 3 4/* $Id$ */ 5 6/*** 7 This file is part of avahi. 8 9 avahi is free software; you can redistribute it and/or modify it 10 under the terms of the GNU Lesser General Public License as 11 published by the Free Software Foundation; either version 2.1 of the 12 License, or (at your option) any later version. 13 14 avahi is distributed in the hope that it will be useful, but WITHOUT 15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General 17 Public License for more details. 18 19 You should have received a copy of the GNU Lesser General Public 20 License along with avahi; if not, write to the Free Software 21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 22 USA. 23***/ 24 25/** A locally registered DNS resource record */ 26typedef struct AvahiEntry AvahiEntry; 27 28#include <avahi-common/llist.h> 29#include <avahi-common/watch.h> 30 31#include "core.h" 32#include "iface.h" 33#include "prioq.h" 34#include "timeeventq.h" 35#include "announce.h" 36#include "browse.h" 37#include "dns.h" 38#include "rrlist.h" 39#include "hashmap.h" 40#include "wide-area.h" 41#include "multicast-lookup.h" 42#include "dns-srv-rr.h" 43 44#define AVAHI_LEGACY_UNICAST_REFLECT_SLOTS_MAX 100 45 46#define AVAHI_FLAGS_VALID(flags, max) (!((flags) & ~(max))) 47 48#define AVAHI_RR_HOLDOFF_MSEC 1000 49#define AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT 20000 50#define AVAHI_RR_RATE_LIMIT_COUNT 15 51 52typedef struct AvahiLegacyUnicastReflectSlot AvahiLegacyUnicastReflectSlot; 53 54struct AvahiLegacyUnicastReflectSlot { 55 AvahiServer *server; 56 57 uint16_t id, original_id; 58 AvahiAddress address; 59 uint16_t port; 60 int interface; 61 struct timeval elapse_time; 62 AvahiTimeEvent *time_event; 63}; 64 65struct AvahiEntry { 66 AvahiServer *server; 67 AvahiSEntryGroup *group; 68 69 int dead; 70 71 AvahiPublishFlags flags; 72 AvahiRecord *record; 73 AvahiIfIndex interface; 74 AvahiProtocol protocol; 75 76 AVAHI_LLIST_FIELDS(AvahiEntry, entries); 77 AVAHI_LLIST_FIELDS(AvahiEntry, by_key); 78 AVAHI_LLIST_FIELDS(AvahiEntry, by_group); 79 80 AVAHI_LLIST_HEAD(AvahiAnnouncer, announcers); 81}; 82 83struct AvahiSEntryGroup { 84 AvahiServer *server; 85 int dead; 86 87 AvahiEntryGroupState state; 88 void* userdata; 89 AvahiSEntryGroupCallback callback; 90 91 unsigned n_probing; 92 93 unsigned n_register_try; 94 struct timeval register_time; 95 AvahiTimeEvent *register_time_event; 96 97 struct timeval established_at; 98 99 AVAHI_LLIST_FIELDS(AvahiSEntryGroup, groups); 100 AVAHI_LLIST_HEAD(AvahiEntry, entries); 101}; 102 103struct AvahiServer { 104 const AvahiPoll *poll_api; 105 106 AvahiInterfaceMonitor *monitor; 107 AvahiServerConfig config; 108 109 AVAHI_LLIST_HEAD(AvahiEntry, entries); 110 AvahiHashmap *entries_by_key; 111 112 AVAHI_LLIST_HEAD(AvahiSEntryGroup, groups); 113 114 AVAHI_LLIST_HEAD(AvahiSRecordBrowser, record_browsers); 115 AvahiHashmap *record_browser_hashmap; 116 AVAHI_LLIST_HEAD(AvahiSHostNameResolver, host_name_resolvers); 117 AVAHI_LLIST_HEAD(AvahiSAddressResolver, address_resolvers); 118 AVAHI_LLIST_HEAD(AvahiSDomainBrowser, domain_browsers); 119 AVAHI_LLIST_HEAD(AvahiSServiceTypeBrowser, service_type_browsers); 120 AVAHI_LLIST_HEAD(AvahiSServiceBrowser, service_browsers); 121 AVAHI_LLIST_HEAD(AvahiSServiceResolver, service_resolvers); 122 AVAHI_LLIST_HEAD(AvahiSDNSServerBrowser, dns_server_browsers); 123 124 int need_entry_cleanup, need_group_cleanup, need_browser_cleanup; 125 126 AvahiTimeEventQueue *time_event_queue; 127 128 char *host_name, *host_name_fqdn, *domain_name; 129 130 int fd_ipv4, fd_ipv6, 131 /* The following two sockets two are used for reflection only */ 132 fd_legacy_unicast_ipv4, fd_legacy_unicast_ipv6; 133 134 AvahiWatch *watch_ipv4, *watch_ipv6, 135 *watch_legacy_unicast_ipv4, *watch_legacy_unicast_ipv6; 136 137 AvahiServerState state; 138 AvahiServerCallback callback; 139 void* userdata; 140 141 AvahiSEntryGroup *hinfo_entry_group; 142 AvahiSEntryGroup *browse_domain_entry_group; 143 unsigned n_host_rr_pending; 144 145 /* Used for assembling responses */ 146 AvahiRecordList *record_list; 147 148 /* Used for reflection of legacy unicast packets */ 149 AvahiLegacyUnicastReflectSlot **legacy_unicast_reflect_slots; 150 uint16_t legacy_unicast_reflect_id; 151 152 /* The last error code */ 153 int error; 154 155 /* The local service cookie */ 156 uint32_t local_service_cookie; 157 158 AvahiMulticastLookupEngine *multicast_lookup_engine; 159 AvahiWideAreaLookupEngine *wide_area_lookup_engine; 160}; 161 162void avahi_entry_free(AvahiServer*s, AvahiEntry *e); 163void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g); 164 165void avahi_cleanup_dead_entries(AvahiServer *s); 166 167void avahi_server_prepare_response(AvahiServer *s, AvahiInterface *i, AvahiEntry *e, int unicast_response, int auxiliary); 168void avahi_server_prepare_matching_responses(AvahiServer *s, AvahiInterface *i, AvahiKey *k, int unicast_response); 169void avahi_server_generate_response(AvahiServer *s, AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, uint16_t port, int legacy_unicast, int is_probe); 170 171void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state); 172 173int avahi_entry_is_commited(AvahiEntry *e); 174 175void avahi_server_enumerate_aux_records(AvahiServer *s, AvahiInterface *i, AvahiRecord *r, void (*callback)(AvahiServer *s, AvahiRecord *r, int flush_cache, void* userdata), void* userdata); 176 177void avahi_host_rr_entry_group_callback(AvahiServer *s, AvahiSEntryGroup *g, AvahiEntryGroupState state, void *userdata); 178 179void avahi_server_decrease_host_rr_pending(AvahiServer *s); 180 181int avahi_server_set_errno(AvahiServer *s, int error); 182 183int avahi_server_is_service_local(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, const char *name); 184int avahi_server_is_record_local(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *record); 185 186int avahi_server_add_ptr( 187 AvahiServer *s, 188 AvahiSEntryGroup *g, 189 AvahiIfIndex interface, 190 AvahiProtocol protocol, 191 AvahiPublishFlags flags, 192 uint32_t ttl, 193 const char *name, 194 const char *dest); 195 196#define AVAHI_CHECK_VALIDITY(server, expression, error) { \ 197 if (!(expression)) \ 198 return avahi_server_set_errno((server), (error)); \ 199} 200 201#define AVAHI_CHECK_VALIDITY_RETURN_NULL(server, expression, error) { \ 202 if (!(expression)) { \ 203 avahi_server_set_errno((server), (error)); \ 204 return NULL; \ 205 } \ 206} 207 208#define AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(server, expression, error) {\ 209 if (!(expression)) { \ 210 ret = avahi_server_set_errno((server), (error)); \ 211 goto fail; \ 212 } \ 213} 214 215#define AVAHI_ASSERT_TRUE(expression) { \ 216 int __tmp = !!(expression); \ 217 assert(__tmp); \ 218} 219 220#define AVAHI_ASSERT_SUCCESS(expression) { \ 221 int __tmp = (expression); \ 222 assert(__tmp == 0); \ 223} 224 225#endif 226