-/* $Id$ */
-
/***
This file is part of avahi.
-
+
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
-
+
avahi is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.
-
+
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
#endif
#include <string.h>
-#include <sys/socket.h>
-#include <asm/types.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
#include <errno.h>
-#include <net/if.h>
#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
#include <avahi-common/error.h>
#include <avahi-common/malloc.h>
+#include <avahi-common/domain.h>
#include "iface.h"
-#include "netlink.h"
#include "dns.h"
#include "socket.h"
#include "announce.h"
#include "util.h"
#include "log.h"
+#include "multicast-lookup.h"
+#include "querier.h"
+
+void avahi_interface_address_update_rrs(AvahiInterfaceAddress *a, int remove_rrs) {
+ AvahiInterfaceMonitor *m;
-static void update_address_rr(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a, int remove_rrs) {
- assert(m);
assert(a);
+ m = a->monitor;
- if (a->interface->announcing &&
- m->list == LIST_DONE &&
- avahi_interface_address_relevant(a) &&
+ if (m->list_complete &&
+ avahi_interface_address_is_relevant(a) &&
+ avahi_interface_is_relevant(a->interface) &&
!remove_rrs &&
m->server->config.publish_addresses &&
(m->server->state == AVAHI_SERVER_RUNNING ||
m->server->state == AVAHI_SERVER_REGISTERING)) {
/* Fill the entry group */
- if (!a->entry_group)
+ if (!a->entry_group)
a->entry_group = avahi_s_entry_group_new(m->server, avahi_host_rr_entry_group_callback, NULL);
if (!a->entry_group) /* OOM */
return;
-
+
if (avahi_s_entry_group_is_empty(a->entry_group)) {
- char t[64];
- avahi_address_snprint(t, sizeof(t), &a->address);
+ char t[AVAHI_ADDRESS_STR_MAX];
+ AvahiProtocol p;
+
+ p = (a->interface->protocol == AVAHI_PROTO_INET && m->server->config.publish_a_on_ipv6) ||
+ (a->interface->protocol == AVAHI_PROTO_INET6 && m->server->config.publish_aaaa_on_ipv4) ? AVAHI_PROTO_UNSPEC : a->interface->protocol;
- avahi_log_info("Registering new address %s on %s.", t, a->interface->hardware->name);
+ avahi_address_snprint(t, sizeof(t), &a->address);
+ avahi_log_info("Registering new address record for %s on %s.%s.", t, a->interface->hardware->name, p == AVAHI_PROTO_UNSPEC ? "*" : avahi_proto_to_string(p));
- if (avahi_server_add_address(m->server, a->entry_group, a->interface->hardware->index, a->interface->protocol, 0, NULL, &a->address) < 0) {
+ if (avahi_server_add_address(m->server, a->entry_group, a->interface->hardware->index, p, AVAHI_PUBLISH_NO_REVERSE, NULL, &a->address) < 0) {
avahi_log_warn(__FILE__": avahi_server_add_address() failed: %s", avahi_strerror(m->server->error));
avahi_s_entry_group_free(a->entry_group);
a->entry_group = NULL;
/* Clear the entry group */
if (a->entry_group && !avahi_s_entry_group_is_empty(a->entry_group)) {
- char t[64];
+ char t[AVAHI_ADDRESS_STR_MAX];
avahi_address_snprint(t, sizeof(t), &a->address);
+ avahi_log_info("Withdrawing address record for %s on %s.", t, a->interface->hardware->name);
+
if (avahi_s_entry_group_get_state(a->entry_group) == AVAHI_ENTRY_GROUP_REGISTERING &&
- m->server->state == AVAHI_SERVER_REGISTERING)
+ m->server->state == AVAHI_SERVER_REGISTERING)
avahi_server_decrease_host_rr_pending(m->server);
- avahi_log_info("Withdrawing address %s on %s.", t, a->interface->hardware->name);
-
avahi_s_entry_group_reset(a->entry_group);
}
- }
+ }
}
-static void update_interface_rr(AvahiInterfaceMonitor *m, AvahiInterface *i, int remove_rrs) {
+void avahi_interface_update_rrs(AvahiInterface *i, int remove_rrs) {
AvahiInterfaceAddress *a;
-
- assert(m);
+
assert(i);
for (a = i->addresses; a; a = a->address_next)
- update_address_rr(m, a, remove_rrs);
+ avahi_interface_address_update_rrs(a, remove_rrs);
}
-static void update_hw_interface_rr(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, int remove_rrs) {
+void avahi_hw_interface_update_rrs(AvahiHwInterface *hw, int remove_rrs) {
AvahiInterface *i;
+ AvahiInterfaceMonitor *m;
- assert(m);
assert(hw);
+ m = hw->monitor;
for (i = hw->interfaces; i; i = i->by_hardware_next)
- update_interface_rr(m, i, remove_rrs);
+ avahi_interface_update_rrs(i, remove_rrs);
- if (m->list == LIST_DONE &&
+ if (m->list_complete &&
!remove_rrs &&
m->server->config.publish_workstation &&
- (m->server->state == AVAHI_SERVER_RUNNING ||
- m->server->state == AVAHI_SERVER_REGISTERING)) {
+ (m->server->state == AVAHI_SERVER_RUNNING)) {
if (!hw->entry_group)
hw->entry_group = avahi_s_entry_group_new(m->server, avahi_host_rr_entry_group_callback, NULL);
if (!hw->entry_group)
return; /* OOM */
-
- if (avahi_s_entry_group_is_empty(hw->entry_group)) {
- char *name;
- char *t;
- if (!(t = avahi_format_mac_address(hw->mac_address, hw->mac_address_size)))
- return; /* OOM */
+ if (avahi_s_entry_group_is_empty(hw->entry_group)) {
+ char name[AVAHI_LABEL_MAX], unescaped[AVAHI_LABEL_MAX], mac[256];
+ const char *p = m->server->host_name;
- name = avahi_strdup_printf("%s [%s]", m->server->host_name, t);
- avahi_free(t);
+ avahi_unescape_label(&p, unescaped, sizeof(unescaped));
+ avahi_format_mac_address(mac, sizeof(mac), hw->mac_address, hw->mac_address_size);
+ snprintf(name, sizeof(name), "%s [%s]", unescaped, mac);
- if (!name)
- return; /* OOM */
-
- if (avahi_server_add_service(m->server, hw->entry_group, hw->index, AVAHI_PROTO_UNSPEC, name, "_workstation._tcp", NULL, NULL, 9, NULL) < 0) {
- avahi_log_warn(__FILE__": avahi_server_add_service() failed.");
+ if (avahi_server_add_service(m->server, hw->entry_group, hw->index, AVAHI_PROTO_UNSPEC, 0, name, "_workstation._tcp", NULL, NULL, 9, NULL) < 0) {
+ avahi_log_warn(__FILE__": avahi_server_add_service() failed: %s", avahi_strerror(m->server->error));
avahi_s_entry_group_free(hw->entry_group);
hw->entry_group = NULL;
} else
avahi_s_entry_group_commit(hw->entry_group);
-
- avahi_free(name);
}
-
+
} else {
if (hw->entry_group && !avahi_s_entry_group_is_empty(hw->entry_group)) {
- if (avahi_s_entry_group_get_state(hw->entry_group) == AVAHI_ENTRY_GROUP_REGISTERING)
+ avahi_log_info("Withdrawing workstation service for %s.", hw->name);
+
+ if (avahi_s_entry_group_get_state(hw->entry_group) == AVAHI_ENTRY_GROUP_REGISTERING &&
+ m->server->state == AVAHI_SERVER_REGISTERING)
avahi_server_decrease_host_rr_pending(m->server);
avahi_s_entry_group_reset(hw->entry_group);
}
}
-static void free_address(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a) {
+void avahi_interface_monitor_update_rrs(AvahiInterfaceMonitor *m, int remove_rrs) {
+ AvahiHwInterface *hw;
+
assert(m);
+
+ for (hw = m->hw_interfaces; hw; hw = hw->hardware_next)
+ avahi_hw_interface_update_rrs(hw, remove_rrs);
+}
+
+static int interface_mdns_mcast_join(AvahiInterface *i, int join) {
+ char at[AVAHI_ADDRESS_STR_MAX];
+ int r;
+ assert(i);
+
+ if (!!join == !!i->mcast_joined)
+ return 0;
+
+ if ((i->protocol == AVAHI_PROTO_INET6 && i->monitor->server->fd_ipv6 < 0) ||
+ (i->protocol == AVAHI_PROTO_INET && i->monitor->server->fd_ipv4 < 0))
+ return -1;
+
+ if (join) {
+ AvahiInterfaceAddress *a;
+
+ /* Look if there's an address with global scope */
+ for (a = i->addresses; a; a = a->address_next)
+ if (a->global_scope)
+ break;
+
+ /* No address with a global scope has been found, so let's use
+ * any. */
+ if (!a)
+ a = i->addresses;
+
+ /* Hmm, there is no address available. */
+ if (!a)
+ return -1;
+
+ i->local_mcast_address = a->address;
+ }
+
+ avahi_log_info("%s mDNS multicast group on interface %s.%s with address %s.",
+ join ? "Joining" : "Leaving",
+ i->hardware->name,
+ avahi_proto_to_string(i->protocol),
+ avahi_address_snprint(at, sizeof(at), &i->local_mcast_address));
+
+ if (i->protocol == AVAHI_PROTO_INET6)
+ r = avahi_mdns_mcast_join_ipv6(i->monitor->server->fd_ipv6, &i->local_mcast_address.data.ipv6, i->hardware->index, join);
+ else {
+ assert(i->protocol == AVAHI_PROTO_INET);
+
+ r = avahi_mdns_mcast_join_ipv4(i->monitor->server->fd_ipv4, &i->local_mcast_address.data.ipv4, i->hardware->index, join);
+ }
+
+ if (r < 0)
+ i->mcast_joined = 0;
+ else
+ i->mcast_joined = join;
+
+ return 0;
+}
+
+static int interface_mdns_mcast_rejoin(AvahiInterface *i) {
+ AvahiInterfaceAddress *a, *usable = NULL, *found = NULL;
+ assert(i);
+
+ if (!i->mcast_joined)
+ return 0;
+
+ /* Check whether old address we joined with is still available. If
+ * not, rejoin using an other address. */
+
+ for (a = i->addresses; a; a = a->address_next) {
+ if (a->global_scope && !usable)
+ usable = a;
+
+ if (avahi_address_cmp(&a->address, &i->local_mcast_address) == 0) {
+
+ if (a->global_scope)
+ /* No action necessary: the address still exists and
+ * has global scope. */
+ return 0;
+
+ found = a;
+ }
+ }
+
+ if (found && !usable)
+ /* No action necessary: the address still exists and no better one has been found */
+ return 0;
+
+ interface_mdns_mcast_join(i, 0);
+ return interface_mdns_mcast_join(i, 1);
+}
+
+void avahi_interface_address_free(AvahiInterfaceAddress *a) {
assert(a);
assert(a->interface);
- update_address_rr(m, a, 1);
+ avahi_interface_address_update_rrs(a, 1);
AVAHI_LLIST_REMOVE(AvahiInterfaceAddress, address, a->interface->addresses, a);
if (a->entry_group)
avahi_s_entry_group_free(a->entry_group);
-
+
+ interface_mdns_mcast_rejoin(a->interface);
+
avahi_free(a);
}
-static void free_interface(AvahiInterfaceMonitor *m, AvahiInterface *i, int send_goodbye) {
- assert(m);
+void avahi_interface_free(AvahiInterface *i, int send_goodbye) {
assert(i);
- avahi_goodbye_interface(m->server, i, send_goodbye);
+ /* Handle goodbyes and remove announcers */
+ avahi_goodbye_interface(i->monitor->server, i, send_goodbye, 1);
avahi_response_scheduler_force(i->response_scheduler);
-
- assert(!i->announcements);
+ assert(!i->announcers);
+
+ if (i->mcast_joined)
+ interface_mdns_mcast_join(i, 0);
+
+ /* Remove queriers */
+ avahi_querier_free_all(i);
+ avahi_hashmap_free(i->queriers_by_key);
+
+ /* Remove local RRs */
+ avahi_interface_update_rrs(i, 1);
- update_interface_rr(m, i, 1);
-
while (i->addresses)
- free_address(m, i->addresses);
+ avahi_interface_address_free(i->addresses);
avahi_response_scheduler_free(i->response_scheduler);
avahi_query_scheduler_free(i->query_scheduler);
avahi_probe_scheduler_free(i->probe_scheduler);
avahi_cache_free(i->cache);
-
- AVAHI_LLIST_REMOVE(AvahiInterface, interface, m->interfaces, i);
+
+ AVAHI_LLIST_REMOVE(AvahiInterface, interface, i->monitor->interfaces, i);
AVAHI_LLIST_REMOVE(AvahiInterface, by_hardware, i->hardware->interfaces, i);
-
+
avahi_free(i);
}
-static void free_hw_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, int send_goodbye) {
- assert(m);
+void avahi_hw_interface_free(AvahiHwInterface *hw, int send_goodbye) {
assert(hw);
- update_hw_interface_rr(m, hw, 1);
-
+ avahi_hw_interface_update_rrs(hw, 1);
+
while (hw->interfaces)
- free_interface(m, hw->interfaces, send_goodbye);
+ avahi_interface_free(hw->interfaces, send_goodbye);
if (hw->entry_group)
avahi_s_entry_group_free(hw->entry_group);
-
- AVAHI_LLIST_REMOVE(AvahiHwInterface, hardware, m->hw_interfaces, hw);
- avahi_hashmap_remove(m->hashmap, &hw->index);
+
+ AVAHI_LLIST_REMOVE(AvahiHwInterface, hardware, hw->monitor->hw_interfaces, hw);
+ avahi_hashmap_remove(hw->monitor->hashmap, &hw->index);
avahi_free(hw->name);
avahi_free(hw);
}
-static AvahiInterfaceAddress* get_address(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *raddr) {
- AvahiInterfaceAddress *ia;
-
- assert(m);
- assert(i);
- assert(raddr);
-
- for (ia = i->addresses; ia; ia = ia->address_next)
- if (avahi_address_cmp(&ia->address, raddr) == 0)
- return ia;
-
- return NULL;
-}
-
-static int netlink_list_items(AvahiNetlink *nl, uint16_t type, unsigned *ret_seq) {
- struct nlmsghdr *n;
- struct rtgenmsg *gen;
- uint8_t req[1024];
-
- memset(&req, 0, sizeof(req));
- n = (struct nlmsghdr*) req;
- n->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
- n->nlmsg_type = type;
- n->nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
- n->nlmsg_pid = 0;
-
- gen = NLMSG_DATA(n);
- memset(gen, 0, sizeof(struct rtgenmsg));
- gen->rtgen_family = AF_UNSPEC;
-
- return avahi_netlink_send(nl, n, ret_seq);
-}
-
-static void new_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, AvahiProtocol protocol) {
+AvahiInterface* avahi_interface_new(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, AvahiProtocol protocol) {
AvahiInterface *i;
-
+
assert(m);
assert(hw);
- assert(protocol != AVAHI_PROTO_UNSPEC);
+ assert(AVAHI_PROTO_VALID(protocol));
if (!(i = avahi_new(AvahiInterface, 1)))
goto fail; /* OOM */
-
+
i->monitor = m;
i->hardware = hw;
i->protocol = protocol;
i->announcing = 0;
+ i->mcast_joined = 0;
AVAHI_LLIST_HEAD_INIT(AvahiInterfaceAddress, i->addresses);
- AVAHI_LLIST_HEAD_INIT(AvahiAnnouncement, i->announcements);
+ AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, i->announcers);
+
+ AVAHI_LLIST_HEAD_INIT(AvahiQuerier, i->queriers);
+ i->queriers_by_key = avahi_hashmap_new((AvahiHashFunc) avahi_key_hash, (AvahiEqualFunc) avahi_key_equal, NULL, NULL);
i->cache = avahi_cache_new(m->server, i);
i->response_scheduler = avahi_response_scheduler_new(i);
AVAHI_LLIST_PREPEND(AvahiInterface, by_hardware, hw->interfaces, i);
AVAHI_LLIST_PREPEND(AvahiInterface, interface, m->interfaces, i);
- return;
+ return i;
+
fail:
if (i) {
if (i->probe_scheduler)
avahi_probe_scheduler_free(i->probe_scheduler);
}
-
+
+ return NULL;
}
-static void check_interface_relevant(AvahiInterfaceMonitor *m, AvahiInterface *i) {
- int b;
+AvahiHwInterface *avahi_hw_interface_new(AvahiInterfaceMonitor *m, AvahiIfIndex idx) {
+ AvahiHwInterface *hw;
assert(m);
- assert(i);
-
- b = avahi_interface_relevant(i);
+ assert(AVAHI_IF_VALID(idx));
- if (m->list == LIST_DONE && b && !i->announcing) {
- avahi_log_info("New relevant interface %s.%s.", i->hardware->name, avahi_proto_to_string(i->protocol));
+ if (!(hw = avahi_new(AvahiHwInterface, 1)))
+ return NULL;
- if (i->protocol == AVAHI_PROTO_INET)
- avahi_mdns_mcast_join_ipv4(m->server->fd_ipv4, i->hardware->index);
- if (i->protocol == AVAHI_PROTO_INET6)
- avahi_mdns_mcast_join_ipv6(m->server->fd_ipv6, i->hardware->index);
+ hw->monitor = m;
+ hw->name = NULL;
+ hw->flags_ok = 0;
+ hw->mtu = 1500;
+ hw->index = idx;
+ hw->mac_address_size = 0;
+ hw->entry_group = NULL;
+ hw->ratelimit_begin.tv_sec = 0;
+ hw->ratelimit_begin.tv_usec = 0;
+ hw->ratelimit_counter = 0;
- i->announcing = 1;
- avahi_announce_interface(m->server, i);
- avahi_browser_new_interface(m->server, i);
- } else if (!b && i->announcing) {
- avahi_log_info("Interface %s.%s no longer relevant.", i->hardware->name, avahi_proto_to_string(i->protocol));
+ AVAHI_LLIST_HEAD_INIT(AvahiInterface, hw->interfaces);
+ AVAHI_LLIST_PREPEND(AvahiHwInterface, hardware, m->hw_interfaces, hw);
- if (i->protocol == AVAHI_PROTO_INET)
- avahi_mdns_mcast_leave_ipv4(m->server->fd_ipv4, i->hardware->index);
- if (i->protocol == AVAHI_PROTO_INET6)
- avahi_mdns_mcast_leave_ipv6(m->server->fd_ipv6, i->hardware->index);
+ avahi_hashmap_insert(m->hashmap, &hw->index, hw);
- avahi_goodbye_interface(m->server, i, 0);
- avahi_response_scheduler_clear(i->response_scheduler);
- avahi_query_scheduler_clear(i->query_scheduler);
- avahi_probe_scheduler_clear(i->probe_scheduler);
- avahi_cache_flush(i->cache);
+ if (m->server->fd_ipv4 >= 0 || m->server->config.publish_a_on_ipv6)
+ avahi_interface_new(m, hw, AVAHI_PROTO_INET);
+ if (m->server->fd_ipv6 >= 0 || m->server->config.publish_aaaa_on_ipv4)
+ avahi_interface_new(m, hw, AVAHI_PROTO_INET6);
- i->announcing = 0;
- }
+ return hw;
}
-static void check_hw_interface_relevant(AvahiInterfaceMonitor *m, AvahiHwInterface *hw) {
- AvahiInterface *i;
-
- assert(m);
- assert(hw);
-
- for (i = hw->interfaces; i; i = i->by_hardware_next)
- check_interface_relevant(m, i);
-}
-
-static void check_all_interfaces_relevant(AvahiInterfaceMonitor *m) {
- AvahiInterface *i;
- assert(m);
-
- for (i = m->interfaces; i; i = i->interface_next)
- check_interface_relevant(m, i);
-}
+AvahiInterfaceAddress *avahi_interface_address_new(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *addr, unsigned prefix_len) {
+ AvahiInterfaceAddress *a;
-static void netlink_callback(AvahiNetlink *nl, struct nlmsghdr *n, void* userdata) {
- AvahiInterfaceMonitor *m = userdata;
-
assert(m);
- assert(n);
- assert(m->netlink == nl);
-
- if (n->nlmsg_type == RTM_NEWLINK) {
- struct ifinfomsg *ifinfomsg = NLMSG_DATA(n);
- AvahiHwInterface *hw;
- struct rtattr *a = NULL;
- size_t l;
-
- if (ifinfomsg->ifi_family != AF_UNSPEC)
- return;
-
- if (!(hw = avahi_hashmap_lookup(m->hashmap, &ifinfomsg->ifi_index))) {
-
- if (!(hw = avahi_new(AvahiHwInterface, 1)))
- return; /* OOM */
-
- hw->monitor = m;
- hw->name = NULL;
- hw->flags = 0;
- hw->mtu = 1500;
- hw->index = (AvahiIfIndex) ifinfomsg->ifi_index;
- hw->mac_address_size = 0;
- hw->entry_group = NULL;
-
- AVAHI_LLIST_HEAD_INIT(AvahiInterface, hw->interfaces);
- AVAHI_LLIST_PREPEND(AvahiHwInterface, hardware, m->hw_interfaces, hw);
-
- avahi_hashmap_insert(m->hashmap, &hw->index, hw);
-
- if (m->server->fd_ipv4 >= 0)
- new_interface(m, hw, AVAHI_PROTO_INET);
- if (m->server->fd_ipv6 >= 0)
- new_interface(m, hw, AVAHI_PROTO_INET6);
- }
-
- hw->flags = ifinfomsg->ifi_flags;
-
- l = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg));
- a = IFLA_RTA(ifinfomsg);
+ assert(i);
- while (RTA_OK(a, l)) {
- switch(a->rta_type) {
- case IFLA_IFNAME:
- avahi_free(hw->name);
- hw->name = avahi_strndup(RTA_DATA(a), RTA_PAYLOAD(a));
- break;
+ if (!(a = avahi_new(AvahiInterfaceAddress, 1)))
+ return NULL;
- case IFLA_MTU:
- assert(RTA_PAYLOAD(a) == sizeof(unsigned int));
- hw->mtu = *((unsigned int*) RTA_DATA(a));
- break;
+ a->interface = i;
+ a->monitor = m;
+ a->address = *addr;
+ a->prefix_len = prefix_len;
+ a->global_scope = 0;
+ a->deprecated = 0;
+ a->entry_group = NULL;
- case IFLA_ADDRESS: {
- hw->mac_address_size = RTA_PAYLOAD(a);
- if (hw->mac_address_size > AVAHI_MAX_MAC_ADDRESS)
- hw->mac_address_size = AVAHI_MAX_MAC_ADDRESS;
-
- memcpy(hw->mac_address, RTA_DATA(a), hw->mac_address_size);
- break;
- }
-
- default:
- ;
- }
+ AVAHI_LLIST_PREPEND(AvahiInterfaceAddress, address, i->addresses, a);
- a = RTA_NEXT(a, l);
- }
+ return a;
+}
- check_hw_interface_relevant(m, hw);
- update_hw_interface_rr(m, hw, 0);
-
- } else if (n->nlmsg_type == RTM_DELLINK) {
- struct ifinfomsg *ifinfomsg = NLMSG_DATA(n);
- AvahiHwInterface *hw;
+void avahi_interface_check_relevant(AvahiInterface *i) {
+ int b;
+ AvahiInterfaceMonitor *m;
- if (ifinfomsg->ifi_family != AF_UNSPEC)
- return;
-
- if (!(hw = avahi_interface_monitor_get_hw_interface(m, (AvahiIfIndex) ifinfomsg->ifi_index)))
- return;
+ assert(i);
+ m = i->monitor;
- free_hw_interface(m, hw, 0);
-
- } else if (n->nlmsg_type == RTM_NEWADDR || n->nlmsg_type == RTM_DELADDR) {
+ b = avahi_interface_is_relevant(i);
- struct ifaddrmsg *ifaddrmsg = NLMSG_DATA(n);
- AvahiInterface *i;
- struct rtattr *a = NULL;
- size_t l;
- AvahiAddress raddr;
- int raddr_valid = 0;
+ if (m->list_complete && b && !i->announcing) {
+ interface_mdns_mcast_join(i, 1);
- if (ifaddrmsg->ifa_family != AF_INET && ifaddrmsg->ifa_family != AF_INET6)
- return;
+ if (i->mcast_joined) {
+ avahi_log_info("New relevant interface %s.%s for mDNS.", i->hardware->name, avahi_proto_to_string(i->protocol));
- if (!(i = (AvahiInterface*) avahi_interface_monitor_get_interface(m, (AvahiIfIndex) ifaddrmsg->ifa_index, avahi_af_to_proto(ifaddrmsg->ifa_family))))
- return;
+ i->announcing = 1;
+ avahi_announce_interface(m->server, i);
+ avahi_multicast_lookup_engine_new_interface(m->server->multicast_lookup_engine, i);
+ }
- raddr.proto = avahi_af_to_proto(ifaddrmsg->ifa_family);
+ } else if (!b && i->announcing) {
+ avahi_log_info("Interface %s.%s no longer relevant for mDNS.", i->hardware->name, avahi_proto_to_string(i->protocol));
- l = NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg));
- a = IFA_RTA(ifaddrmsg);
+ interface_mdns_mcast_join(i, 0);
- while (RTA_OK(a, l)) {
+ avahi_goodbye_interface(m->server, i, 0, 1);
+ avahi_querier_free_all(i);
- switch(a->rta_type) {
- case IFA_ADDRESS:
- if ((raddr.proto == AVAHI_PROTO_INET6 && RTA_PAYLOAD(a) != 16) ||
- (raddr.proto == AVAHI_PROTO_INET && RTA_PAYLOAD(a) != 4))
- return;
+ avahi_response_scheduler_clear(i->response_scheduler);
+ avahi_query_scheduler_clear(i->query_scheduler);
+ avahi_probe_scheduler_clear(i->probe_scheduler);
+ avahi_cache_flush(i->cache);
- memcpy(raddr.data.data, RTA_DATA(a), RTA_PAYLOAD(a));
- raddr_valid = 1;
+ i->announcing = 0;
- break;
+ } else
+ interface_mdns_mcast_rejoin(i);
+}
- default:
- ;
- }
-
- a = RTA_NEXT(a, l);
- }
-
- if (!raddr_valid)
- return;
+void avahi_hw_interface_check_relevant(AvahiHwInterface *hw) {
+ AvahiInterface *i;
- if (n->nlmsg_type == RTM_NEWADDR) {
- AvahiInterfaceAddress *addr;
-
- if (!(addr = get_address(m, i, &raddr))) {
- if (!(addr = avahi_new(AvahiInterfaceAddress, 1)))
- return; /* OOM */
-
- addr->monitor = m;
- addr->address = raddr;
- addr->interface = i;
- addr->entry_group = NULL;
-
- AVAHI_LLIST_PREPEND(AvahiInterfaceAddress, address, i->addresses, addr);
- }
-
- addr->flags = ifaddrmsg->ifa_flags;
- addr->scope = ifaddrmsg->ifa_scope;
- addr->prefix_len = ifaddrmsg->ifa_prefixlen;
- } else {
- AvahiInterfaceAddress *addr;
-
- if (!(addr = get_address(m, i, &raddr)))
- return;
+ assert(hw);
- free_address(m, addr);
- }
+ for (i = hw->interfaces; i; i = i->by_hardware_next)
+ avahi_interface_check_relevant(i);
+}
- check_interface_relevant(m, i);
- update_interface_rr(m, i, 0);
-
- } else if (n->nlmsg_type == NLMSG_DONE) {
-
- if (m->list == LIST_IFACE) {
-
- if (netlink_list_items(m->netlink, RTM_GETADDR, &m->query_addr_seq) < 0) {
- avahi_log_warn("NETLINK: Failed to list addrs: %s", strerror(errno));
- m->list = LIST_DONE;
- } else
- m->list = LIST_ADDR;
+void avahi_interface_monitor_check_relevant(AvahiInterfaceMonitor *m) {
+ AvahiInterface *i;
- } else
- /* We're through */
- m->list = LIST_DONE;
+ assert(m);
- if (m->list == LIST_DONE) {
- check_all_interfaces_relevant(m);
- avahi_update_host_rrs(m, 0);
- avahi_log_info("Network interface enumeration completed.");
- }
-
- } else if (n->nlmsg_type == NLMSG_ERROR && (n->nlmsg_seq == m->query_link_seq || n->nlmsg_seq == m->query_addr_seq)) {
- struct nlmsgerr *e = NLMSG_DATA (n);
-
- if (e->error)
- avahi_log_warn("NETLINK: Failed to browse: %s", strerror(-e->error));
- }
+ for (i = m->interfaces; i; i = i->interface_next)
+ avahi_interface_check_relevant(i);
}
AvahiInterfaceMonitor *avahi_interface_monitor_new(AvahiServer *s) {
if (!(m = avahi_new0(AvahiInterfaceMonitor, 1)))
return NULL; /* OOM */
-
- m->server = s;
- if (!(m->netlink = avahi_netlink_new(s->poll_api, RTMGRP_LINK|RTMGRP_IPV4_IFADDR|RTMGRP_IPV6_IFADDR, netlink_callback, m)))
- goto fail;
+ m->server = s;
+ m->list_complete = 0;
m->hashmap = avahi_hashmap_new(avahi_int_hash, avahi_int_equal, NULL, NULL);
AVAHI_LLIST_HEAD_INIT(AvahiInterface, m->interfaces);
AVAHI_LLIST_HEAD_INIT(AvahiHwInterface, m->hw_interfaces);
- if (netlink_list_items(m->netlink, RTM_GETLINK, &m->query_link_seq) < 0)
+ if (avahi_interface_monitor_init_osdep(m) < 0)
goto fail;
- m->list = LIST_IFACE;
-
return m;
fail:
return NULL;
}
-void avahi_interface_monitor_sync(AvahiInterfaceMonitor *m) {
- assert(m);
-
- while (m->list != LIST_DONE) {
- if (!avahi_netlink_work(m->netlink, 1))
- break;
- }
-}
-
void avahi_interface_monitor_free(AvahiInterfaceMonitor *m) {
assert(m);
while (m->hw_interfaces)
- free_hw_interface(m, m->hw_interfaces, 1);
+ avahi_hw_interface_free(m->hw_interfaces, 1);
assert(!m->interfaces);
-
- if (m->netlink)
- avahi_netlink_free(m->netlink);
-
+ avahi_interface_monitor_free_osdep(m);
+
if (m->hashmap)
avahi_hashmap_free(m->hashmap);
AvahiInterface* avahi_interface_monitor_get_interface(AvahiInterfaceMonitor *m, AvahiIfIndex idx, AvahiProtocol protocol) {
AvahiHwInterface *hw;
AvahiInterface *i;
-
+
assert(m);
- assert(idx > 0);
+ assert(idx >= 0);
assert(protocol != AVAHI_PROTO_UNSPEC);
if (!(hw = avahi_interface_monitor_get_hw_interface(m, idx)))
AvahiHwInterface* avahi_interface_monitor_get_hw_interface(AvahiInterfaceMonitor *m, AvahiIfIndex idx) {
assert(m);
- assert(idx > 0);
+ assert(idx >= 0);
return avahi_hashmap_lookup(m->hashmap, &idx);
}
+AvahiInterfaceAddress* avahi_interface_monitor_get_address(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *raddr) {
+ AvahiInterfaceAddress *ia;
+
+ assert(m);
+ assert(i);
+ assert(raddr);
+
+ for (ia = i->addresses; ia; ia = ia->address_next)
+ if (avahi_address_cmp(&ia->address, raddr) == 0)
+ return ia;
+
+ return NULL;
+}
+
void avahi_interface_send_packet_unicast(AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, uint16_t port) {
assert(i);
assert(p);
-/* char t[64]; */
- if (!avahi_interface_relevant(i))
+ if (!i->announcing)
return;
-
+
assert(!a || a->proto == i->protocol);
-/* if (a) */
-/* avahi_log_debug("unicast sending on '%s.%i' to %s:%u", i->hardware->name, i->protocol, avahi_address_snprint(t, sizeof(t), a), port); */
-/* else */
-/* avahi_log_debug("multicast sending on '%s.%i'", i->hardware->name, i->protocol); */
-
+ if (i->monitor->server->config.ratelimit_interval > 0) {
+ struct timeval now, end;
+
+ gettimeofday(&now, NULL);
+
+ end = i->hardware->ratelimit_begin;
+ avahi_timeval_add(&end, i->monitor->server->config.ratelimit_interval);
+
+ if (i->hardware->ratelimit_begin.tv_sec <= 0 ||
+ avahi_timeval_compare(&end, &now) < 0) {
+
+ i->hardware->ratelimit_begin = now;
+ i->hardware->ratelimit_counter = 0;
+ }
+
+ if (i->hardware->ratelimit_counter > i->monitor->server->config.ratelimit_burst)
+ return;
+
+ i->hardware->ratelimit_counter++;
+ }
+
if (i->protocol == AVAHI_PROTO_INET && i->monitor->server->fd_ipv4 >= 0)
- avahi_send_dns_packet_ipv4(i->monitor->server->fd_ipv4, i->hardware->index, p, a ? &a->data.ipv4 : NULL, port);
+ avahi_send_dns_packet_ipv4(i->monitor->server->fd_ipv4, i->hardware->index, p, i->mcast_joined ? &i->local_mcast_address.data.ipv4 : NULL, a ? &a->data.ipv4 : NULL, port);
else if (i->protocol == AVAHI_PROTO_INET6 && i->monitor->server->fd_ipv6 >= 0)
- avahi_send_dns_packet_ipv6(i->monitor->server->fd_ipv6, i->hardware->index, p, a ? &a->data.ipv6 : NULL, port);
+ avahi_send_dns_packet_ipv6(i->monitor->server->fd_ipv6, i->hardware->index, p, i->mcast_joined ? &i->local_mcast_address.data.ipv6 : NULL, a ? &a->data.ipv6 : NULL, port);
}
void avahi_interface_send_packet(AvahiInterface *i, AvahiDnsPacket *p) {
avahi_interface_send_packet_unicast(i, p, NULL, 0);
}
-int avahi_interface_post_query(AvahiInterface *i, AvahiKey *key, int immediately) {
+int avahi_interface_post_query(AvahiInterface *i, AvahiKey *key, int immediately, unsigned *ret_id) {
assert(i);
assert(key);
- if (avahi_interface_relevant(i))
- return avahi_query_scheduler_post(i->query_scheduler, key, immediately);
+ if (!i->announcing)
+ return 0;
- return 0;
+ return avahi_query_scheduler_post(i->query_scheduler, key, immediately, ret_id);
+}
+
+int avahi_interface_withraw_query(AvahiInterface *i, unsigned id) {
+
+ return avahi_query_scheduler_withdraw_by_id(i->query_scheduler, id);
}
int avahi_interface_post_response(AvahiInterface *i, AvahiRecord *record, int flush_cache, const AvahiAddress *querier, int immediately) {
assert(i);
assert(record);
- if (avahi_interface_relevant(i))
- return avahi_response_scheduler_post(i->response_scheduler, record, flush_cache, querier, immediately);
+ if (!i->announcing)
+ return 0;
- return 0;
+ return avahi_response_scheduler_post(i->response_scheduler, record, flush_cache, querier, immediately);
}
int avahi_interface_post_probe(AvahiInterface *i, AvahiRecord *record, int immediately) {
assert(i);
assert(record);
-
- if (avahi_interface_relevant(i))
- return avahi_probe_scheduler_post(i->probe_scheduler, record, immediately);
- return 0;
+ if (!i->announcing)
+ return 0;
+
+ return avahi_probe_scheduler_post(i->probe_scheduler, record, immediately);
}
int avahi_dump_caches(AvahiInterfaceMonitor *m, AvahiDumpCallback callback, void* userdata) {
assert(m);
for (i = m->interfaces; i; i = i->interface_next) {
- if (avahi_interface_relevant(i)) {
+ if (avahi_interface_is_relevant(i)) {
char ln[256];
snprintf(ln, sizeof(ln), ";;; INTERFACE %s.%s ;;;", i->hardware->name, avahi_proto_to_string(i->protocol));
callback(ln, userdata);
return 0;
}
-int avahi_interface_relevant(AvahiInterface *i) {
+static int avahi_interface_is_relevant_internal(AvahiInterface *i) {
AvahiInterfaceAddress *a;
- int relevant_address;
-
+
assert(i);
- relevant_address = 0;
-
+ if (!i->hardware->flags_ok)
+ return 0;
+
for (a = i->addresses; a; a = a->address_next)
- if (avahi_interface_address_relevant(a)) {
- relevant_address = 1;
- break;
- }
+ if (avahi_interface_address_is_relevant(a))
+ return 1;
+
+ return 0;
+}
+
+int avahi_interface_is_relevant(AvahiInterface *i) {
+ AvahiStringList *l;
+ assert(i);
+
+ for (l = i->monitor->server->config.deny_interfaces; l; l = l->next)
+ if (strcasecmp((char*) l->text, i->hardware->name) == 0)
+ return 0;
+
+ if (i->monitor->server->config.allow_interfaces) {
-/* avahi_log_debug("%p. iface-relevant: %i %i %i %i %i %i", i, relevant_address, */
-/* (i->hardware->flags & IFF_UP), */
-/* (i->hardware->flags & IFF_RUNNING), */
-/* !(i->hardware->flags & IFF_LOOPBACK), */
-/* (i->hardware->flags & IFF_MULTICAST), */
-/* !(i->hardware->flags & IFF_POINTOPOINT)); */
-
- return
- (i->hardware->flags & IFF_UP) &&
- (!i->monitor->server->config.use_iff_running || (i->hardware->flags & IFF_RUNNING)) &&
- !(i->hardware->flags & IFF_LOOPBACK) &&
- (i->hardware->flags & IFF_MULTICAST) &&
- !(i->hardware->flags & IFF_POINTOPOINT) &&
- relevant_address;
-}
-
-int avahi_interface_address_relevant(AvahiInterfaceAddress *a) {
+ for (l = i->monitor->server->config.allow_interfaces; l; l = l->next)
+ if (strcasecmp((char*) l->text, i->hardware->name) == 0)
+ goto good;
+
+ return 0;
+ }
+
+good:
+ return avahi_interface_is_relevant_internal(i);
+}
+
+int avahi_interface_address_is_relevant(AvahiInterfaceAddress *a) {
AvahiInterfaceAddress *b;
assert(a);
- /* Publish public IP addresses */
- if (a->scope == RT_SCOPE_UNIVERSE ||
- a->scope == RT_SCOPE_SITE)
+ /* Publish public and non-deprecated IP addresses */
+ if (a->global_scope && !a->deprecated)
return 1;
- if (a->scope == RT_SCOPE_LINK) {
-
- /* Publish link local IP addresses if they are the only ones on the link */
- for (b = a->interface->addresses; b; b = b->address_next) {
- if (b == a)
- continue;
-
- if (b->scope == RT_SCOPE_UNIVERSE ||
- b->scope == RT_SCOPE_SITE)
- return 0;
- }
+ /* Publish link-local and deprecated IP addresses only if they are
+ * the only ones on the link */
+ for (b = a->interface->addresses; b; b = b->address_next) {
+ if (b == a)
+ continue;
- return 1;
+ if (b->global_scope && !b->deprecated)
+ return 0;
}
- return 0;
+ return 1;
}
int avahi_interface_match(AvahiInterface *i, AvahiIfIndex idx, AvahiProtocol protocol) {
assert(i);
-
- if (idx > 0 && idx != i->hardware->index)
+
+ if (idx != AVAHI_IF_UNSPEC && idx != i->hardware->index)
return 0;
if (protocol != AVAHI_PROTO_UNSPEC && protocol != i->protocol)
void avahi_interface_monitor_walk(AvahiInterfaceMonitor *m, AvahiIfIndex interface, AvahiProtocol protocol, AvahiInterfaceMonitorWalkCallback callback, void* userdata) {
assert(m);
assert(callback);
-
- if (interface > 0) {
+
+ if (interface != AVAHI_IF_UNSPEC) {
if (protocol != AVAHI_PROTO_UNSPEC) {
AvahiInterface *i;
-
+
if ((i = avahi_interface_monitor_get_interface(m, interface, protocol)))
callback(m, i, userdata);
-
+
} else {
AvahiHwInterface *hw;
AvahiInterface *i;
if (avahi_interface_match(i, interface, protocol))
callback(m, i, userdata);
}
-
+
} else {
AvahiInterface *i;
-
+
for (i = m->interfaces; i; i = i->interface_next)
if (avahi_interface_match(i, interface, protocol))
callback(m, i, userdata);
}
}
-void avahi_update_host_rrs(AvahiInterfaceMonitor *m, int remove_rrs) {
- AvahiHwInterface *hw;
-
- assert(m);
-
- for (hw = m->hw_interfaces; hw; hw = hw->hardware_next)
- update_hw_interface_rr(m, hw, remove_rrs);
-}
int avahi_address_is_local(AvahiInterfaceMonitor *m, const AvahiAddress *a) {
AvahiInterface *i;
int avahi_interface_address_on_link(AvahiInterface *i, const AvahiAddress *a) {
AvahiInterfaceAddress *ia;
-
+
assert(i);
assert(a);
if (a->proto == AVAHI_PROTO_INET) {
uint32_t m;
-
+
m = ~(((uint32_t) -1) >> ia->prefix_len);
-
+
if ((ntohl(a->data.ipv4.address) & m) == (ntohl(ia->address.data.ipv4.address) & m))
return 1;
} else {
assert(a->proto == AVAHI_PROTO_INET6);
pl = ia->prefix_len;
-
+
for (j = 0; j < 16; j++) {
uint8_t m;
if (pl == 0)
return 1;
-
+
if (pl >= 8) {
m = 0xFF;
pl -= 8;
m = ~(0xFF >> pl);
pl = 0;
}
-
+
if ((a->data.ipv6.address[j] & m) != (ia->address.data.ipv6.address[j] & m))
break;
}
int avahi_interface_has_address(AvahiInterfaceMonitor *m, AvahiIfIndex iface, const AvahiAddress *a) {
AvahiInterface *i;
AvahiInterfaceAddress *j;
-
+
assert(m);
assert(iface != AVAHI_IF_UNSPEC);
assert(a);
return 0;
}
+
+AvahiIfIndex avahi_find_interface_for_address(AvahiInterfaceMonitor *m, const AvahiAddress *a) {
+ AvahiInterface *i;
+ assert(m);
+
+ /* Some stupid OS don't support passing the interface index when a
+ * packet is received. We have to work around that limitation by
+ * looking for an interface that has the incoming address
+ * attached. This is sometimes ambiguous, but we have to live with
+ * it. */
+
+ for (i = m->interfaces; i; i = i->interface_next) {
+ AvahiInterfaceAddress *ai;
+
+ if (i->protocol != a->proto)
+ continue;
+
+ for (ai = i->addresses; ai; ai = ai->address_next)
+ if (avahi_address_cmp(a, &ai->address) == 0)
+ return i->hardware->index;
+ }
+
+ return AVAHI_IF_UNSPEC;
+}
projects / catta / blobdiff