X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;ds=sidebyside;f=iface.c;h=519a65b4e0a3bd2ffea6874310beb32aa6bcc2b2;hb=7dce450bdc23ea306a61e00f914481e29ebcb176;hp=d3f47196f9886b65faa328da0ebf63db0a295707;hpb=4ba1a4b0b4488e5058af67b789187735b529075e;p=catta

diff --git a/iface.c b/iface.c
index d3f4719..519a65b 100644
--- a/iface.c
+++ b/iface.c
@@ -10,26 +10,28 @@
 #include "netlink.h"
 #include "dns.h"
 #include "socket.h"
+#include "announce.h"
 
-static void update_address_rr(flxInterfaceMonitor *m, flxInterfaceAddress *a, int remove) {
+static void update_address_rr(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a, int remove) {
     g_assert(m);
     g_assert(a);
 
-    if (!flx_address_is_relevant(a) || remove) {
-        if (a->rr_id >= 0) {
-            flx_server_remove(m->server, a->rr_id);
-            a->rr_id = -1;
+    if (!avahi_interface_address_relevant(a) || remove) {
+        if (a->entry_group) {
+            avahi_entry_group_free(a->entry_group);
+            a->entry_group = NULL;
         }
     } else {
-        if (a->rr_id < 0) {
-            a->rr_id = flx_server_get_next_id(m->server);
-            flx_server_add_address(m->server, a->rr_id, a->interface->index, AF_UNSPEC, FALSE, m->server->hostname, &a->address);
+        if (!a->entry_group) {
+            a->entry_group = avahi_entry_group_new(m->server, NULL, NULL);
+            avahi_server_add_address(m->server, a->entry_group, a->interface->hardware->index, AF_UNSPEC, 0, NULL, &a->address);
+            avahi_entry_group_commit(a->entry_group);
         }
     }
 }
 
-static void update_interface_rr(flxInterfaceMonitor *m, flxInterface *i, int remove) {
-    flxInterfaceAddress *a;
+static void update_interface_rr(AvahiInterfaceMonitor *m, AvahiInterface *i, int remove) {
+    AvahiInterfaceAddress *a;
     g_assert(m);
     g_assert(i);
 
@@ -37,63 +39,82 @@ static void update_interface_rr(flxInterfaceMonitor *m, flxInterface *i, int rem
         update_address_rr(m, a, remove);
 }
 
-static void free_address(flxInterfaceMonitor *m, flxInterfaceAddress *a) {
+static void update_hw_interface_rr(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, int remove) {
+    AvahiInterface *i;
+
+    g_assert(m);
+    g_assert(hw);
+
+    for (i = hw->interfaces; i; i = i->by_hardware_next)
+        update_interface_rr(m, i, remove);
+}
+
+static void free_address(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a) {
     g_assert(m);
     g_assert(a);
     g_assert(a->interface);
 
-    if (a->address.family == AF_INET)
-        a->interface->n_ipv4_addrs --;
-    else if (a->address.family == AF_INET6)
-        a->interface->n_ipv6_addrs --;
-
-    FLX_LLIST_REMOVE(flxInterfaceAddress, address, a->interface->addresses, a);
+    AVAHI_LLIST_REMOVE(AvahiInterfaceAddress, address, a->interface->addresses, a);
 
-    flx_server_remove(m->server, a->rr_id);
+    if (a->entry_group)
+        avahi_entry_group_free(a->entry_group);
     
     g_free(a);
 }
 
-static void free_interface(flxInterfaceMonitor *m, flxInterface *i) {
+static void free_interface(AvahiInterfaceMonitor *m, AvahiInterface *i, gboolean send_goodbye) {
     g_assert(m);
     g_assert(i);
 
+    g_message("removing interface %s.%i", i->hardware->name, i->protocol);
+    avahi_goodbye_interface(m->server, i, send_goodbye);
+    g_message("flushing...");
+    avahi_packet_scheduler_flush_responses(i->scheduler);
+    g_message("done");
+    
+    g_assert(!i->announcements);
+
     while (i->addresses)
         free_address(m, i->addresses);
 
-    if (i->ipv4_cache)
-        flx_cache_free(i->ipv4_cache);
-    if (i->ipv6_cache)
-        flx_cache_free(i->ipv6_cache);
+    avahi_packet_scheduler_free(i->scheduler);
+    avahi_cache_free(i->cache);
     
-    g_assert(i->n_ipv6_addrs == 0);
-    g_assert(i->n_ipv4_addrs == 0);
-
-    FLX_LLIST_REMOVE(flxInterface, interface, m->interfaces, i);
-    g_hash_table_remove(m->hash_table, &i->index);
-
-    flx_cache_free(i->ipv4_cache);
-    flx_cache_free(i->ipv6_cache);
+    AVAHI_LLIST_REMOVE(AvahiInterface, interface, m->interfaces, i);
+    AVAHI_LLIST_REMOVE(AvahiInterface, by_hardware, i->hardware->interfaces, i);
     
-    g_free(i->name);
     g_free(i);
 }
 
-static flxInterfaceAddress* get_address(flxInterfaceMonitor *m, flxInterface *i, const flxAddress *raddr) {
-    flxInterfaceAddress *ia;
+static void free_hw_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, gboolean send_goodbye) {
+    g_assert(m);
+    g_assert(hw);
+
+    while (hw->interfaces)
+        free_interface(m, hw->interfaces, send_goodbye);
+
+    AVAHI_LLIST_REMOVE(AvahiHwInterface, hardware, m->hw_interfaces, hw);
+    g_hash_table_remove(m->hash_table, &hw->index);
+
+    g_free(hw->name);
+    g_free(hw);
+}
+
+static AvahiInterfaceAddress* get_address(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *raddr) {
+    AvahiInterfaceAddress *ia;
     
     g_assert(m);
     g_assert(i);
     g_assert(raddr);
 
     for (ia = i->addresses; ia; ia = ia->address_next)
-        if (flx_address_cmp(&ia->address, raddr) == 0)
+        if (avahi_address_cmp(&ia->address, raddr) == 0)
             return ia;
 
     return NULL;
 }
 
-static int netlink_list_items(flxNetlink *nl, guint16 type, guint *ret_seq) {
+static int netlink_list_items(AvahiNetlink *nl, guint16 type, guint *ret_seq) {
     struct nlmsghdr *n;
     struct rtgenmsg *gen;
     guint8 req[1024];
@@ -109,11 +130,76 @@ static int netlink_list_items(flxNetlink *nl, guint16 type, guint *ret_seq) {
     memset(gen, 0, sizeof(struct rtgenmsg));
     gen->rtgen_family = AF_UNSPEC;
 
-    return flx_netlink_send(nl, n, ret_seq);
+    return avahi_netlink_send(nl, n, ret_seq);
 }
 
-static void callback(flxNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
-    flxInterfaceMonitor *m = userdata;
+static void new_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, guchar protocol) {
+    AvahiInterface *i;
+    
+    g_assert(m);
+    g_assert(hw);
+    g_assert(protocol != AF_UNSPEC);
+
+    i = g_new(AvahiInterface, 1);
+    i->monitor = m;
+    i->hardware = hw;
+    i->protocol = protocol;
+    i->announcing = FALSE;
+
+    AVAHI_LLIST_HEAD_INIT(AvahiInterfaceAddress, i->addresses);
+    AVAHI_LLIST_HEAD_INIT(AvahiAnnouncement, i->announcements);
+
+    i->cache = avahi_cache_new(m->server, i);
+    i->scheduler = avahi_packet_scheduler_new(m->server, i);
+
+    AVAHI_LLIST_PREPEND(AvahiInterface, by_hardware, hw->interfaces, i);
+    AVAHI_LLIST_PREPEND(AvahiInterface, interface, m->interfaces, i);
+}
+
+static void check_interface_relevant(AvahiInterfaceMonitor *m, AvahiInterface *i) {
+    gboolean b;
+
+    g_assert(m);
+    g_assert(i);
+
+    b = avahi_interface_relevant(i);
+
+    if (b && !i->announcing) {
+        g_message("New relevant interface %s.%i", i->hardware->name, i->protocol);
+
+        if (i->protocol == AF_INET)
+            avahi_mdns_mcast_join_ipv4 (i->hardware->index, m->server->fd_ipv4);
+        if (i->protocol == AF_INET6)
+            avahi_mdns_mcast_join_ipv6 (i->hardware->index, m->server->fd_ipv6);
+
+        i->announcing = TRUE;
+        avahi_announce_interface(m->server, i);
+    } else if (!b && i->announcing) {
+        g_message("Interface %s.%i no longer relevant", i->hardware->name, i->protocol);
+
+        avahi_goodbye_interface(m->server, i, FALSE);
+
+        if (i->protocol == AF_INET)
+            avahi_mdns_mcast_leave_ipv4 (i->hardware->index, m->server->fd_ipv4);
+        if (i->protocol == AF_INET6)
+            avahi_mdns_mcast_leave_ipv6 (i->hardware->index, m->server->fd_ipv6);
+
+        i->announcing = FALSE;
+    }
+}
+
+static void check_hw_interface_relevant(AvahiInterfaceMonitor *m, AvahiHwInterface *hw) {
+    AvahiInterface *i;
+    
+    g_assert(m);
+    g_assert(hw);
+
+    for (i = hw->interfaces; i; i = i->by_hardware_next)
+        check_interface_relevant(m, i);
+}
+
+static void callback(AvahiNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
+    AvahiInterfaceMonitor *m = userdata;
     
     g_assert(m);
     g_assert(n);
@@ -121,32 +207,33 @@ static void callback(flxNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
 
     if (n->nlmsg_type == RTM_NEWLINK) {
         struct ifinfomsg *ifinfomsg = NLMSG_DATA(n);
-        flxInterface *i;
+        AvahiHwInterface *hw;
         struct rtattr *a = NULL;
         size_t l;
-        int changed;
 
         if (ifinfomsg->ifi_family != AF_UNSPEC)
             return;
 
-        if ((i = (flxInterface*) flx_interface_monitor_get_interface(m, ifinfomsg->ifi_index)))
-            changed = 1;
-        else {
-            i = g_new(flxInterface, 1);
-            i->monitor = m;
-            i->name = NULL;
-            i->index = ifinfomsg->ifi_index;
-            i->addresses = NULL;
-            i->n_ipv4_addrs = i->n_ipv6_addrs = 0;
-            FLX_LLIST_PREPEND(flxInterface, interface, m->interfaces, i);
-            g_hash_table_insert(m->hash_table, &i->index, i);
-            i->ipv4_cache = flx_cache_new(m->server, i);
-            i->ipv6_cache = flx_cache_new(m->server, i);
+        if (!(hw = g_hash_table_lookup(m->hash_table, &ifinfomsg->ifi_index))) {
+            hw = g_new(AvahiHwInterface, 1);
+            hw->monitor = m;
+            hw->name = NULL;
+            hw->flags = 0;
+            hw->mtu = 1500;
+            hw->index = ifinfomsg->ifi_index;
+
+            AVAHI_LLIST_HEAD_INIT(AvahiInterface, hw->interfaces);
+            AVAHI_LLIST_PREPEND(AvahiHwInterface, hardware, m->hw_interfaces, hw);
             
-            changed = 0;
+            g_hash_table_insert(m->hash_table, &hw->index, hw);
+
+            if (m->server->fd_ipv4 >= 0)
+                new_interface(m, hw, AF_INET);
+            if (m->server->fd_ipv6 >= 0)
+                new_interface(m, hw, AF_INET6);
         }
         
-        i->flags = ifinfomsg->ifi_flags;
+        hw->flags = ifinfomsg->ifi_flags;
 
         l = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg));
         a = IFLA_RTA(ifinfomsg);
@@ -154,8 +241,13 @@ static void callback(flxNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
         while (RTA_OK(a, l)) {
             switch(a->rta_type) {
                 case IFLA_IFNAME:
-                    g_free(i->name);
-                    i->name = g_strndup(RTA_DATA(a), RTA_PAYLOAD(a));
+                    g_free(hw->name);
+                    hw->name = g_strndup(RTA_DATA(a), RTA_PAYLOAD(a));
+                    break;
+
+                case IFLA_MTU:
+                    g_assert(RTA_PAYLOAD(a) == sizeof(unsigned int));
+                    hw->mtu = *((unsigned int*) RTA_DATA(a));
                     break;
                     
                 default:
@@ -165,34 +257,36 @@ static void callback(flxNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
             a = RTA_NEXT(a, l);
         }
 
-        update_interface_rr(m, i, 0);
+        update_hw_interface_rr(m, hw, FALSE);
+        check_hw_interface_relevant(m, hw);
+        
     } else if (n->nlmsg_type == RTM_DELLINK) {
         struct ifinfomsg *ifinfomsg = NLMSG_DATA(n);
-        flxInterface *i;
+        AvahiHwInterface *hw;
+        AvahiInterface *i;
 
         if (ifinfomsg->ifi_family != AF_UNSPEC)
             return;
         
-        if (!(i = (flxInterface*) flx_interface_monitor_get_interface(m, ifinfomsg->ifi_index)))
+        if (!(hw = avahi_interface_monitor_get_hw_interface(m, ifinfomsg->ifi_index)))
             return;
 
-        update_interface_rr(m, i, 1);
-        free_interface(m, i);
+        update_hw_interface_rr(m, hw, TRUE);
+        free_hw_interface(m, hw, FALSE);
         
     } else if (n->nlmsg_type == RTM_NEWADDR || n->nlmsg_type == RTM_DELADDR) {
 
         struct ifaddrmsg *ifaddrmsg = NLMSG_DATA(n);
-        flxInterface *i;
+        AvahiInterface *i;
         struct rtattr *a = NULL;
         size_t l;
-        int changed;
-        flxAddress raddr;
+        AvahiAddress raddr;
         int raddr_valid = 0;
 
         if (ifaddrmsg->ifa_family != AF_INET && ifaddrmsg->ifa_family != AF_INET6)
             return;
 
-        if (!(i = (flxInterface*) flx_interface_monitor_get_interface(m, ifaddrmsg->ifa_index)))
+        if (!(i = (AvahiInterface*) avahi_interface_monitor_get_interface(m, ifaddrmsg->ifa_index, ifaddrmsg->ifa_family)))
             return;
 
         raddr.family = ifaddrmsg->ifa_family;
@@ -207,7 +301,7 @@ static void callback(flxNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
                         (raddr.family == AF_INET && RTA_PAYLOAD(a) != 4))
                         return;
 
-                    memcpy(raddr.data, RTA_DATA(a), RTA_PAYLOAD(a));
+                    memcpy(raddr.data.data, RTA_DATA(a), RTA_PAYLOAD(a));
                     raddr_valid = 1;
 
                     break;
@@ -215,61 +309,57 @@ static void callback(flxNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
                 default:
                     ;
             }
-
+            
             a = RTA_NEXT(a, l);
         }
 
-
+        
         if (!raddr_valid)
             return;
 
         if (n->nlmsg_type == RTM_NEWADDR) {
-            flxInterfaceAddress *addr;
+            AvahiInterfaceAddress *addr;
             
-            if ((addr = get_address(m, i, &raddr)))
-                changed = 1;
-            else {
-                addr = g_new(flxInterfaceAddress, 1);
+            if (!(addr = get_address(m, i, &raddr))) {
+                addr = g_new(AvahiInterfaceAddress, 1);
+                addr->monitor = m;
                 addr->address = raddr;
                 addr->interface = i;
+                addr->entry_group = NULL;
 
-                if (raddr.family == AF_INET)
-                    i->n_ipv4_addrs++;
-                else if (raddr.family == AF_INET6)
-                    i->n_ipv6_addrs++;
-
-                addr->rr_id = -1;
-
-                FLX_LLIST_PREPEND(flxInterfaceAddress, address, i->addresses, addr);
-                
-                changed = 0;
+                AVAHI_LLIST_PREPEND(AvahiInterfaceAddress, address, i->addresses, addr);
             }
             
             addr->flags = ifaddrmsg->ifa_flags;
             addr->scope = ifaddrmsg->ifa_scope;
 
-            update_address_rr(m, addr, 0);
+            update_address_rr(m, addr, FALSE);
+            check_interface_relevant(m, i);
         } else {
-            flxInterfaceAddress *addr;
+            AvahiInterfaceAddress *addr;
             
             if (!(addr = get_address(m, i, &raddr)))
                 return;
 
-            update_address_rr(m, addr, 1);
+            update_address_rr(m, addr, TRUE);
             free_address(m, addr);
+
+            check_interface_relevant(m, i);
         }
                 
     } else if (n->nlmsg_type == NLMSG_DONE) {
-
+        
         if (m->list == LIST_IFACE) {
             m->list = LIST_DONE;
             
-            if (netlink_list_items(m->netlink, RTM_GETADDR, &m->query_addr_seq) < 0) {
+            if (netlink_list_items(m->netlink, RTM_GETADDR, &m->query_addr_seq) < 0)
                 g_warning("NETLINK: Failed to list addrs: %s", strerror(errno));
-            } else
+            else
                 m->list = LIST_ADDR;
-        } else
+        } else {
             m->list = LIST_DONE;
+            g_message("Enumeration complete");
+        }
         
     } 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);
@@ -279,35 +369,52 @@ static void callback(flxNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
     }
 }
 
-flxInterfaceMonitor *flx_interface_monitor_new(flxServer *s) {
-    flxInterfaceMonitor *m = NULL;
+AvahiInterfaceMonitor *avahi_interface_monitor_new(AvahiServer *s) {
+    AvahiInterfaceMonitor *m = NULL;
 
-    m = g_new0(flxInterfaceMonitor, 1);
+    m = g_new0(AvahiInterfaceMonitor, 1);
     m->server = s;
-    if (!(m->netlink = flx_netlink_new(s->context, RTMGRP_LINK|RTMGRP_IPV4_IFADDR|RTMGRP_IPV6_IFADDR, callback, m)))
+    if (!(m->netlink = avahi_netlink_new(s->context, G_PRIORITY_DEFAULT-10, RTMGRP_LINK|RTMGRP_IPV4_IFADDR|RTMGRP_IPV6_IFADDR, callback, m)))
         goto fail;
 
     m->hash_table = g_hash_table_new(g_int_hash, g_int_equal);
-    m->interfaces = 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)
         goto fail;
 
     m->list = LIST_IFACE;
-    
+
     return m;
 
 fail:
-    flx_interface_monitor_free(m);
+    avahi_interface_monitor_free(m);
     return NULL;
 }
 
-void flx_interface_monitor_free(flxInterfaceMonitor *m) {
+void avahi_interface_monitor_sync(AvahiInterfaceMonitor *m) {
+    g_assert(m);
+    
+    while (m->list != LIST_DONE) {
+        if (!avahi_netlink_work(m->netlink, TRUE))
+            break;
+    } 
+}
+
+void avahi_interface_monitor_free(AvahiInterfaceMonitor *m) {
     g_assert(m);
 
-    if (m->netlink)
-        flx_netlink_free(m->netlink);
+    while (m->hw_interfaces)
+        free_hw_interface(m, m->hw_interfaces, TRUE);
 
+    g_assert(!m->interfaces);
+
+    
+    if (m->netlink)
+        avahi_netlink_free(m->netlink);
+    
     if (m->hash_table)
         g_hash_table_destroy(m->hash_table);
 
@@ -315,58 +422,141 @@ void flx_interface_monitor_free(flxInterfaceMonitor *m) {
 }
 
 
-flxInterface* flx_interface_monitor_get_interface(flxInterfaceMonitor *m, gint index) {
+AvahiInterface* avahi_interface_monitor_get_interface(AvahiInterfaceMonitor *m, gint index, guchar protocol) {
+    AvahiHwInterface *hw;
+    AvahiInterface *i;
+    
+    g_assert(m);
+    g_assert(index > 0);
+    g_assert(protocol != AF_UNSPEC);
+
+    if (!(hw = avahi_interface_monitor_get_hw_interface(m, index)))
+        return NULL;
+
+    for (i = hw->interfaces; i; i = i->by_hardware_next)
+        if (i->protocol == protocol)
+            return i;
+
+    return NULL;
+}
+
+AvahiHwInterface* avahi_interface_monitor_get_hw_interface(AvahiInterfaceMonitor *m, gint index) {
     g_assert(m);
     g_assert(index > 0);
 
     return g_hash_table_lookup(m->hash_table, &index);
 }
 
-flxInterface* flx_interface_monitor_get_first(flxInterfaceMonitor *m) {
+
+void avahi_interface_send_packet(AvahiInterface *i, AvahiDnsPacket *p) {
+    g_assert(i);
+    g_assert(p);
+
+    if (avahi_interface_relevant(i)) {
+        g_message("sending on '%s.%i'", i->hardware->name, i->protocol);
+
+        if (i->protocol == AF_INET && i->monitor->server->fd_ipv4 >= 0)
+            avahi_send_dns_packet_ipv4(i->monitor->server->fd_ipv4, i->hardware->index, p);
+        else if (i->protocol == AF_INET6 && i->monitor->server->fd_ipv6 >= 0)
+            avahi_send_dns_packet_ipv6(i->monitor->server->fd_ipv6, i->hardware->index, p);
+    }
+}
+
+void avahi_interface_post_query(AvahiInterface *i, AvahiKey *key, gboolean immediately) {
+    g_assert(i);
+    g_assert(key);
+
+    if (avahi_interface_relevant(i))
+        avahi_packet_scheduler_post_query(i->scheduler, key, immediately);
+}
+
+
+void avahi_interface_post_response(AvahiInterface *i, const AvahiAddress *a, AvahiRecord *record, gboolean flush_cache, gboolean immediately) {
+    g_assert(i);
+    g_assert(record);
+
+    if (avahi_interface_relevant(i))
+        avahi_packet_scheduler_post_response(i->scheduler, a, record, flush_cache, immediately);
+}
+
+void avahi_interface_post_probe(AvahiInterface *i, AvahiRecord *record, gboolean immediately) {
+    g_assert(i);
+    g_assert(record);
+    
+    if (avahi_interface_relevant(i))
+        avahi_packet_scheduler_post_probe(i->scheduler, record, immediately);
+}
+
+void avahi_dump_caches(AvahiInterfaceMonitor *m, FILE *f) {
+    AvahiInterface *i;
     g_assert(m);
-    return m->interfaces;
+
+    for (i = m->interfaces; i; i = i->interface_next) {
+        if (avahi_interface_relevant(i)) {
+            fprintf(f, "\n;;; INTERFACE %s.%i ;;;\n", i->hardware->name, i->protocol);
+            avahi_cache_dump(i->cache, f);
+        }
+    }
+    fprintf(f, "\n");
 }
 
-int flx_interface_is_relevant(flxInterface *i) {
+gboolean avahi_interface_relevant(AvahiInterface *i) {
     g_assert(i);
 
     return
-        (i->flags & IFF_UP) &&
-        (i->flags & IFF_RUNNING) &&
-        !(i->flags & IFF_LOOPBACK);
+        (i->hardware->flags & IFF_UP) &&
+        (i->hardware->flags & IFF_RUNNING) &&
+        !(i->hardware->flags & IFF_LOOPBACK) &&
+        (i->hardware->flags & IFF_MULTICAST) &&
+        i->addresses;
 }
 
-int flx_address_is_relevant(flxInterfaceAddress *a) {
+gboolean avahi_interface_address_relevant(AvahiInterfaceAddress *a) { 
     g_assert(a);
 
-    return
-        a->scope == RT_SCOPE_UNIVERSE &&
-        flx_interface_is_relevant(a->interface);
+    return a->scope == RT_SCOPE_UNIVERSE;
 }
 
-void flx_interface_send_query(flxInterface *i, guchar protocol, flxKey *k) {
-    flxDnsPacket *p;
+
+gboolean avahi_interface_match(AvahiInterface *i, gint index, guchar protocol) {
     g_assert(i);
-    g_assert(k);
+    
+    if (index > 0 && index != i->hardware->index)
+        return FALSE;
 
-    p = flx_dns_packet_new();
-    flx_dns_packet_set_field(p, DNS_FIELD_FLAGS, DNS_FLAGS(0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
+    if (protocol != AF_UNSPEC && protocol != i->protocol)
+        return FALSE;
 
-    flx_dns_packet_append_name(p, k->name);
-    flx_dns_packet_append_uint16(p, k->type);
-    flx_dns_packet_append_uint16(p, k->class);
+    return TRUE;
+}
 
-    flx_dns_packet_set_field(p, DNS_FIELD_QDCOUNT, 1);
 
-    if ((protocol == AF_INET || protocol == AF_UNSPEC) && i->n_ipv4_addrs > 0 && flx_interface_is_relevant(i)) {
-        g_message("sending on '%s':IPv4", i->name);
-        flx_send_dns_packet_ipv4(i->monitor->server->fd_ipv4, i->index, p);
-    }
+void avahi_interface_monitor_walk(AvahiInterfaceMonitor *m, gint interface, guchar protocol, AvahiInterfaceMonitorWalkCallback callback, gpointer userdata) {
+    g_assert(m);
+    g_assert(callback);
+    
+    if (interface > 0) {
+        if (protocol != AF_UNSPEC) {
+            AvahiInterface *i;
+            
+            if ((i = avahi_interface_monitor_get_interface(m, interface, protocol)))
+                callback(m, i, userdata);
+            
+        } else {
+            AvahiHwInterface *hw;
+            AvahiInterface *i;
 
-    if ((protocol == AF_INET6 || protocol == AF_UNSPEC) && i->n_ipv6_addrs > 0 && flx_interface_is_relevant(i)) {
-        g_message("sending on '%s':IPv6", i->name);
-        flx_send_dns_packet_ipv6(i->monitor->server->fd_ipv6, i->index, p);
+            if ((hw = avahi_interface_monitor_get_hw_interface(m, interface)))
+                for (i = hw->interfaces; i; i = i->by_hardware_next)
+                    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);
     }
-    
-    flx_dns_packet_free(p);
 }