+++ /dev/null
-#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 "iface.h"
-#include "netlink.h"
-#include "dns.h"
-#include "socket.h"
-#include "announce.h"
-
-static void update_address_rr(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a, int remove) {
- g_assert(m);
- g_assert(a);
-
- 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->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(AvahiInterfaceMonitor *m, AvahiInterface *i, int remove) {
- AvahiInterfaceAddress *a;
- g_assert(m);
- g_assert(i);
-
- for (a = i->addresses; a; a = a->address_next)
- update_address_rr(m, a, remove);
-}
-
-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);
-
- AVAHI_LLIST_REMOVE(AvahiInterfaceAddress, address, a->interface->addresses, a);
-
- if (a->entry_group)
- avahi_entry_group_free(a->entry_group);
-
- g_free(a);
-}
-
-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);
-
- avahi_packet_scheduler_free(i->scheduler);
- avahi_cache_free(i->cache);
-
- AVAHI_LLIST_REMOVE(AvahiInterface, interface, m->interfaces, i);
- AVAHI_LLIST_REMOVE(AvahiInterface, by_hardware, i->hardware->interfaces, i);
-
- g_free(i);
-}
-
-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 (avahi_address_cmp(&ia->address, raddr) == 0)
- return ia;
-
- return NULL;
-}
-
-static int netlink_list_items(AvahiNetlink *nl, guint16 type, guint *ret_seq) {
- struct nlmsghdr *n;
- struct rtgenmsg *gen;
- guint8 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_MATCH|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, 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);
- g_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 = 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);
-
- 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);
- }
-
- hw->flags = ifinfomsg->ifi_flags;
-
- l = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg));
- a = IFLA_RTA(ifinfomsg);
-
- while (RTA_OK(a, l)) {
- switch(a->rta_type) {
- case IFLA_IFNAME:
- 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:
- ;
- }
-
- a = RTA_NEXT(a, l);
- }
-
- 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);
- AvahiHwInterface *hw;
- AvahiInterface *i;
-
- if (ifinfomsg->ifi_family != AF_UNSPEC)
- return;
-
- if (!(hw = avahi_interface_monitor_get_hw_interface(m, ifinfomsg->ifi_index)))
- return;
-
- 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);
- AvahiInterface *i;
- struct rtattr *a = NULL;
- size_t l;
- AvahiAddress raddr;
- int raddr_valid = 0;
-
- if (ifaddrmsg->ifa_family != AF_INET && ifaddrmsg->ifa_family != AF_INET6)
- return;
-
- if (!(i = (AvahiInterface*) avahi_interface_monitor_get_interface(m, ifaddrmsg->ifa_index, ifaddrmsg->ifa_family)))
- return;
-
- raddr.family = ifaddrmsg->ifa_family;
-
- l = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg));
- a = IFA_RTA(ifaddrmsg);
-
- while (RTA_OK(a, l)) {
- switch(a->rta_type) {
- case IFA_ADDRESS:
- if ((raddr.family == AF_INET6 && RTA_PAYLOAD(a) != 16) ||
- (raddr.family == AF_INET && RTA_PAYLOAD(a) != 4))
- return;
-
- memcpy(raddr.data.data, RTA_DATA(a), RTA_PAYLOAD(a));
- raddr_valid = 1;
-
- break;
-
- default:
- ;
- }
-
- a = RTA_NEXT(a, l);
- }
-
-
- if (!raddr_valid)
- return;
-
- if (n->nlmsg_type == RTM_NEWADDR) {
- AvahiInterfaceAddress *addr;
-
- 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;
-
- AVAHI_LLIST_PREPEND(AvahiInterfaceAddress, address, i->addresses, addr);
- }
-
- addr->flags = ifaddrmsg->ifa_flags;
- addr->scope = ifaddrmsg->ifa_scope;
-
- update_address_rr(m, addr, FALSE);
- check_interface_relevant(m, i);
- } else {
- AvahiInterfaceAddress *addr;
-
- if (!(addr = get_address(m, i, &raddr)))
- return;
-
- 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)
- g_warning("NETLINK: Failed to list addrs: %s", strerror(errno));
- else
- m->list = LIST_ADDR;
- } 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);
-
- if (e->error)
- g_warning("NETLINK: Failed to browse: %s", strerror(-e->error));
- }
-}
-
-AvahiInterfaceMonitor *avahi_interface_monitor_new(AvahiServer *s) {
- AvahiInterfaceMonitor *m = NULL;
-
- m = g_new0(AvahiInterfaceMonitor, 1);
- m->server = s;
- 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);
-
- 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:
- avahi_interface_monitor_free(m);
- return NULL;
-}
-
-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);
-
- 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);
-
- g_free(m);
-}
-
-
-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);
-}
-
-
-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);
-
- 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");
-}
-
-gboolean avahi_interface_relevant(AvahiInterface *i) {
- g_assert(i);
-
- return
- (i->hardware->flags & IFF_UP) &&
- (i->hardware->flags & IFF_RUNNING) &&
- !(i->hardware->flags & IFF_LOOPBACK) &&
- (i->hardware->flags & IFF_MULTICAST) &&
- i->addresses;
-}
-
-gboolean avahi_interface_address_relevant(AvahiInterfaceAddress *a) {
- g_assert(a);
-
- return a->scope == RT_SCOPE_UNIVERSE;
-}
-
-
-gboolean avahi_interface_match(AvahiInterface *i, gint index, guchar protocol) {
- g_assert(i);
-
- if (index > 0 && index != i->hardware->index)
- return FALSE;
-
- if (protocol != AF_UNSPEC && protocol != i->protocol)
- return FALSE;
-
- return TRUE;
-}
-
-
-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 ((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);
- }
-}
projects / catta / blobdiff