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#include <sys/socket.h>
#include <asm/types.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/utsname.h>
#include <net/if.h>
#include "flx.h"
#include "server.h"
#include "util.h"
#include "iface.h"
typedef struct {
flxAddress address;
flxServer *server;
gint id;
} addr_info;
struct _flxLocalAddrSource {
flxServer *server;
GHashTable *hash_table;
gint hinfo_id;
gchar *hostname;
};
static gboolean addr_equal(gconstpointer a, gconstpointer b) {
return flx_address_cmp(a, b) == 0;
}
static guint hash(gconstpointer v, guint l) {
const guint8 *c;
guint hash = 0;
for (c = v; l > 0; c++, l--)
hash = 31 * hash + *c;
return hash;
}
static guint addr_hash(gconstpointer v) {
const flxAddress *a = v;
return hash(a->data, flx_address_get_size(a));
}
static void remove_addr(flxLocalAddrSource *l, const flxInterfaceAddress *a) {
flxAddress foo;
g_assert(l);
g_assert(a);
memset(&foo, 0, sizeof(foo));
foo.family = AF_INET;
g_hash_table_remove(l->hash_table, &foo);
}
static void add_addr(flxLocalAddrSource *l, const flxInterfaceAddress *a) {
addr_info *ai;
g_assert(l);
g_assert(a);
if (g_hash_table_lookup(l->hash_table, &a->address))
return; /* Entry already existant */
ai = g_new(addr_info, 1);
ai->server = l->server;
ai->address = a->address;
ai->id = flx_server_get_next_id(l->server);
flx_server_add_address(l->server, ai->id, a->interface->index, AF_UNSPEC, l->hostname, &ai->address);
g_hash_table_replace(l->hash_table, &ai->address, ai);
}
static void handle_addr(flxLocalAddrSource *l, const flxInterfaceAddress *a) {
g_assert(l);
g_assert(a);
if (!(a->interface->flags & IFF_UP) ||
!(a->interface->flags & IFF_RUNNING) ||
(a->interface->flags & IFF_LOOPBACK) ||
a->scope != RT_SCOPE_UNIVERSE)
remove_addr(l, a);
else
add_addr(l, a);
}
/* Called whenever a new address becomes available, is changed or removed on the local machine */
static void addr_callback(flxInterfaceMonitor *m, flxInterfaceChange change, const flxInterfaceAddress *a, gpointer userdata) {
flxLocalAddrSource *l = userdata;
g_assert(m);
g_assert(a);
g_assert(l);
if (change == FLX_INTERFACE_REMOVE)
remove_addr(l, a);
else
handle_addr(l, a);
}
/* Called whenever a new interface becomes available, is changed or removed on the local machine */
static void interface_callback(flxInterfaceMonitor *m, flxInterfaceChange change, const flxInterface *i, gpointer userdata) {
flxLocalAddrSource *l = userdata;
g_assert(m);
g_assert(i);
g_assert(l);
if (change == FLX_INTERFACE_CHANGE) {
flxInterfaceAddress *a;
for (a = i->addresses; a; a = a->next)
handle_addr(l, a);
}
}
static void destroy(gpointer data) {
addr_info *ai = data;
flx_server_remove(ai->server, ai->id);
g_free(ai);
}
flxLocalAddrSource *flx_local_addr_source_new(flxServer *s) {
flxLocalAddrSource *l;
const flxInterface *i;
struct utsname utsname;
gint length;
gchar *e, *hn, *c;
l = g_new(flxLocalAddrSource, 1);
l->server = s;
l->hash_table = g_hash_table_new_full(addr_hash, addr_equal, NULL, destroy);
hn = flx_get_host_name();
if ((e = strchr(hn, '.')))
*e = 0;
l->hostname = g_strdup_printf("%s.local.", hn);
g_free(hn);
flx_interface_monitor_add_address_callback(s->monitor, addr_callback, l);
flx_interface_monitor_add_interface_callback(s->monitor, interface_callback, l);
for (i = flx_interface_monitor_get_first(s->monitor); i; i = i->next) {
flxInterfaceAddress *a;
for (a = i->addresses; a; a = a->next)
add_addr(l, a);
}
l->hinfo_id = flx_server_get_next_id(l->server);
uname(&utsname);
c = g_strdup_printf("%s%c%s%n", g_strup(utsname.machine), 0, g_strup(utsname.sysname), &length);
flx_server_add(l->server, l->hinfo_id, 0, AF_UNSPEC,
l->hostname, FLX_DNS_TYPE_HINFO, c, length+1);
g_free(c);
return l;
}
void flx_local_addr_source_free(flxLocalAddrSource *l) {
g_assert(l);
flx_interface_monitor_remove_address_callback(l->server->monitor, addr_callback, l);
g_hash_table_destroy(l->hash_table);
flx_server_remove(l->server, l->hinfo_id);
g_free(l->hostname);
g_free(l);
}
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