void add_addr_to_list(struct nl_object *obj, void *data)
{
char buf[INET6_ADDRSTRLEN+5];
std::list<vaddress> *list = static_cast<std::list<vaddress>*>(data);
struct nl_addr *naddr = rtnl_addr_get_local((struct rtnl_addr *) obj);
int ifindex = 0;
int scope = rtnl_addr_get_scope((struct rtnl_addr *) obj);
if (scope == rtnl_str2scope("link"))
ifindex = rtnl_addr_get_ifindex((struct rtnl_addr *) obj);
if (naddr)
{
int family = nl_addr_get_family(naddr);
nl_addr2str( naddr, buf, sizeof( buf ) );
vaddress vaddr(vaddress::Family(family), vaddress::strip_netmask(std::string(buf)), ifindex, false);
list->push_back( vaddr );
}
struct nl_addr *baddr = rtnl_addr_get_broadcast((struct rtnl_addr *) obj);
if (baddr)
{
int family = nl_addr_get_family(baddr);
nl_addr2str( baddr, buf, sizeof( buf ) );
vaddress vaddr(vaddress::Family(family), vaddress::strip_netmask(std::string(buf)), ifindex, true);
list->push_back( vaddr );
}
}
static void
find_one_address (struct nl_object *object, void *user_data)
{
FindAddrInfo *info = user_data;
struct rtnl_addr *addr = (struct rtnl_addr *) object;
struct nl_addr *local;
void *binaddr;
if (info->found)
return;
if (rtnl_addr_get_ifindex (addr) != info->ifindex)
return;
if (rtnl_addr_get_family (addr) != info->family)
return;
if (rtnl_addr_get_prefixlen (addr) != info->prefix)
return;
local = rtnl_addr_get_local (addr);
if (nl_addr_get_family (local) != info->family)
return;
if (nl_addr_get_len (local) != info->addrlen)
return;
binaddr = nl_addr_get_binary_addr (local);
if (binaddr) {
if (memcmp (binaddr, info->addr, info->addrlen) == 0)
info->found = TRUE; /* Yay, found it */
}
}
TError TNlLink::AddAddress(const TNlAddr &addr) {
struct rtnl_addr *a = rtnl_addr_alloc();
if (!a)
return TError(EError::Unknown, "Cannot allocate address");
rtnl_addr_set_link(a, Link);
rtnl_addr_set_family(a, nl_addr_get_family(addr.Addr));
rtnl_addr_set_flags(a, IFA_F_NODAD);
int ret = rtnl_addr_set_local(a, addr.Addr);
if (ret < 0) {
rtnl_addr_put(a);
return Error(ret, "Cannot set local address");
}
ret = rtnl_addr_add(GetSock(), a, 0);
if (ret < 0) {
rtnl_addr_put(a);
return Error(ret, "Cannot add address");
}
rtnl_addr_put(a);
return TError::Success();
}
static void
wait_for_no_addresses (NMIP6Manager *self, NMIP6Device *device)
{
NMIP6ManagerPrivate *priv = NM_IP6_MANAGER_GET_PRIVATE (self);
guint64 now, end;
gboolean has_addrs = TRUE;
now = end = g_get_real_time ();
end += (G_USEC_PER_SEC * 3);
while (has_addrs && now < end) {
struct rtnl_addr *rtnladdr;
struct nl_addr *nladdr;
nl_cache_refill (priv->nlh, priv->addr_cache);
for (has_addrs = FALSE, rtnladdr = FIRST_ADDR (priv->addr_cache);
rtnladdr;
rtnladdr = NEXT_ADDR (rtnladdr)) {
nladdr = rtnl_addr_get_local (rtnladdr);
if ( rtnl_addr_get_ifindex (rtnladdr) == device->ifindex
&& nladdr
&& nl_addr_get_family (nladdr) == AF_INET6) {
/* Still IPv6 addresses on the interface */
has_addrs = TRUE;
nm_log_dbg (LOGD_IP6, "(%s) waiting for cleared IPv6 addresses", device->iface);
g_usleep (100);
now = g_get_real_time ();
break;
}
}
}
}
static void
dump_route (struct rtnl_route *route)
{
char buf6[INET6_ADDRSTRLEN];
char buf4[INET_ADDRSTRLEN];
struct nl_addr *nl;
struct in6_addr *addr6 = NULL;
struct in_addr *addr4 = NULL;
int prefixlen = 0;
const char *sf = "UNSPEC";
int family = rtnl_route_get_family (route);
guint32 log_level = LOGD_IP4 | LOGD_IP6;
memset (buf6, 0, sizeof (buf6));
memset (buf4, 0, sizeof (buf4));
nl = rtnl_route_get_dst (route);
if (nl) {
if (nl_addr_get_family (nl) == AF_INET) {
addr4 = nl_addr_get_binary_addr (nl);
if (addr4)
inet_ntop (AF_INET, addr4, &buf4[0], sizeof (buf4));
} else if (nl_addr_get_family (nl) == AF_INET6) {
addr6 = nl_addr_get_binary_addr (nl);
if (addr6)
inet_ntop (AF_INET6, addr6, &buf6[0], sizeof (buf6));
}
prefixlen = nl_addr_get_prefixlen (nl);
}
if (family == AF_INET) {
sf = "INET";
log_level = LOGD_IP4;
} else if (family == AF_INET6) {
sf = "INET6";
log_level = LOGD_IP6;
}
nm_log_dbg (log_level, " route idx %d family %s (%d) addr %s/%d",
rtnl_route_get_oif (route),
sf, family,
strlen (buf4) ? buf4 : (strlen (buf6) ? buf6 : "<unknown>"),
prefixlen);
}
static void
check_addresses (NMIP6Device *device)
{
NMIP6Manager *manager = device->manager;
NMIP6ManagerPrivate *priv = NM_IP6_MANAGER_GET_PRIVATE (manager);
struct rtnl_addr *rtnladdr;
struct nl_addr *nladdr;
struct in6_addr *addr;
/* Reset address information */
device->has_linklocal = FALSE;
device->has_nonlinklocal = FALSE;
/* Look for any IPv6 addresses the kernel may have set for the device */
for (rtnladdr = (struct rtnl_addr *) nl_cache_get_first (priv->addr_cache);
rtnladdr;
rtnladdr = (struct rtnl_addr *) nl_cache_get_next ((struct nl_object *) rtnladdr)) {
char buf[INET6_ADDRSTRLEN];
if (rtnl_addr_get_ifindex (rtnladdr) != device->ifindex)
continue;
nladdr = rtnl_addr_get_local (rtnladdr);
if (!nladdr || nl_addr_get_family (nladdr) != AF_INET6)
continue;
addr = nl_addr_get_binary_addr (nladdr);
if (inet_ntop (AF_INET6, addr, buf, INET6_ADDRSTRLEN) > 0) {
nm_log_dbg (LOGD_IP6, "(%s): netlink address: %s/%d",
device->iface, buf,
rtnl_addr_get_prefixlen (rtnladdr));
}
if (IN6_IS_ADDR_LINKLOCAL (addr)) {
if (device->state == NM_IP6_DEVICE_UNCONFIGURED)
device_set_state (device, NM_IP6_DEVICE_GOT_LINK_LOCAL);
device->has_linklocal = TRUE;
} else {
if (device->state == NM_IP6_DEVICE_GOT_ROUTER_ADVERTISEMENT)
device_set_state (device, NM_IP6_DEVICE_GOT_ADDRESS);
device->has_nonlinklocal = TRUE;
}
}
/* There might be a LL address hanging around on the interface from
* before in the initial run, but if it goes away later, make sure we
* regress from GOT_LINK_LOCAL back to UNCONFIGURED.
*/
if ((device->state == NM_IP6_DEVICE_GOT_LINK_LOCAL) && !device->has_linklocal)
device_set_state (device, NM_IP6_DEVICE_UNCONFIGURED);
nm_log_dbg (LOGD_IP6, "(%s): addresses checked (state %s)",
device->iface, state_to_string (device->state));
}
/**
* Set IPv6 tokenized interface identifier
* @arg link Link object
* @arg token Tokenized interface identifier
*
* Sets the link's IPv6 tokenized interface identifier.
*
* @return 0 on success
* @return -NLE_NOMEM could not allocate inet6 data
* @return -NLE_INVAL addr is not a valid inet6 address
*/
int rtnl_link_inet6_set_token(struct rtnl_link *link, struct nl_addr *addr)
{
struct inet6_data *id;
if ((nl_addr_get_family(addr) != AF_INET6) ||
(nl_addr_get_len(addr) != sizeof(id->i6_token)))
return -NLE_INVAL;
if (!(id = rtnl_link_af_alloc(link, &inet6_ops)))
return -NLE_NOMEM;
memcpy(&id->i6_token, nl_addr_get_binary_addr(addr),
sizeof(id->i6_token));
return 0;
}
/**
* libnl callback function. Does the real parsing of a record returned by NETLINK. This function
* parses ADDRESS related packets
*
* @param obj Pointer to a struct nl_object response
* @param arg Pointer to a struct etherinfo element where the parse result will be saved
*/
static void callback_nl_address(struct nl_object *obj, void *arg)
{
struct etherinfo *ethi = (struct etherinfo *) arg;
struct nl_addr *addr;
char ip_str[66];
int family;
if( ethi == NULL ) {
return;
}
addr = rtnl_addr_get_local((struct rtnl_addr *)obj);
family = nl_addr_get_family(addr);
switch( family ) {
case AF_INET:
case AF_INET6:
memset(&ip_str, 0, 66);
inet_ntop(family, nl_addr_get_binary_addr(addr), (char *)&ip_str, 64);
if( family == AF_INET ) {
struct nl_addr *brdcst = rtnl_addr_get_broadcast((struct rtnl_addr *)obj);
char brdcst_str[66];
SET_STR_VALUE(ethi->ipv4_address, ip_str);
ethi->ipv4_netmask = rtnl_addr_get_prefixlen((struct rtnl_addr*) obj);
if( brdcst ) {
memset(&brdcst_str, 0, 66);
inet_ntop(family, nl_addr_get_binary_addr(brdcst), (char *)&brdcst_str, 64);
SET_STR_VALUE(ethi->ipv4_broadcast, brdcst_str);
}
} else {
ethi->ipv6_addresses = etherinfo_add_ipv6(ethi->ipv6_addresses,
ip_str,
rtnl_addr_get_prefixlen((struct rtnl_addr*) obj),
rtnl_addr_get_scope((struct rtnl_addr*) obj));
}
return;
default:
return;
}
}
int xfrmnl_ae_build_get_request(struct nl_addr* daddr, unsigned int spi, unsigned int protocol,
unsigned int mark_mask, unsigned int mark_value, struct nl_msg **result)
{
struct nl_msg *msg;
struct xfrm_aevent_id ae_id;
struct xfrmnl_mark mark;
if (!daddr || !spi)
{
fprintf(stderr, "APPLICATION BUG: %s:%d:%s: A valid destination address, spi must be specified\n",
__FILE__, __LINE__, __PRETTY_FUNCTION__);
assert(0);
return -NLE_MISSING_ATTR;
}
memset(&ae_id, 0, sizeof(ae_id));
memcpy (&ae_id.sa_id.daddr, nl_addr_get_binary_addr (daddr), sizeof (uint8_t) * nl_addr_get_len (daddr));
ae_id.sa_id.spi = htonl(spi);
ae_id.sa_id.family = nl_addr_get_family (daddr);
ae_id.sa_id.proto = protocol;
if (!(msg = nlmsg_alloc_simple(XFRM_MSG_GETAE, 0)))
return -NLE_NOMEM;
if (nlmsg_append(msg, &ae_id, sizeof(ae_id), NLMSG_ALIGNTO) < 0)
goto nla_put_failure;
mark.m = mark_mask;
mark.v = mark_value;
NLA_PUT (msg, XFRMA_MARK, sizeof (struct xfrmnl_mark), &mark);
*result = msg;
return 0;
nla_put_failure:
nlmsg_free(msg);
return -NLE_MSGSIZE;
}
static void
nm_ip6_device_sync_from_netlink (NMIP6Device *device, gboolean config_changed)
{
NMIP6Manager *manager = device->manager;
NMIP6ManagerPrivate *priv = NM_IP6_MANAGER_GET_PRIVATE (manager);
struct rtnl_addr *rtnladdr;
struct nl_addr *nladdr;
struct in6_addr *addr;
CallbackInfo *info;
guint dhcp_opts = IP6_DHCP_OPT_NONE;
gboolean found_linklocal = FALSE, found_other = FALSE;
nm_log_dbg (LOGD_IP6, "(%s): syncing with netlink (ra_flags 0x%X) (state/target '%s'/'%s')",
device->iface, device->ra_flags,
state_to_string (device->state),
state_to_string (device->target_state));
/* Look for any IPv6 addresses the kernel may have set for the device */
for (rtnladdr = (struct rtnl_addr *) nl_cache_get_first (priv->addr_cache);
rtnladdr;
rtnladdr = (struct rtnl_addr *) nl_cache_get_next ((struct nl_object *) rtnladdr)) {
char buf[INET6_ADDRSTRLEN];
if (rtnl_addr_get_ifindex (rtnladdr) != device->ifindex)
continue;
nladdr = rtnl_addr_get_local (rtnladdr);
if (!nladdr || nl_addr_get_family (nladdr) != AF_INET6)
continue;
addr = nl_addr_get_binary_addr (nladdr);
if (inet_ntop (AF_INET6, addr, buf, INET6_ADDRSTRLEN) > 0) {
nm_log_dbg (LOGD_IP6, "(%s): netlink address: %s",
device->iface, buf);
}
if (IN6_IS_ADDR_LINKLOCAL (addr)) {
if (device->state == NM_IP6_DEVICE_UNCONFIGURED)
device->state = NM_IP6_DEVICE_GOT_LINK_LOCAL;
found_linklocal = TRUE;
} else {
if (device->state < NM_IP6_DEVICE_GOT_ADDRESS)
device->state = NM_IP6_DEVICE_GOT_ADDRESS;
found_other = TRUE;
}
}
/* There might be a LL address hanging around on the interface from
* before in the initial run, but if it goes away later, make sure we
* regress from GOT_LINK_LOCAL back to UNCONFIGURED.
*/
if ((device->state == NM_IP6_DEVICE_GOT_LINK_LOCAL) && !found_linklocal)
device->state = NM_IP6_DEVICE_UNCONFIGURED;
nm_log_dbg (LOGD_IP6, "(%s): addresses synced (state %s)",
device->iface, state_to_string (device->state));
/* We only care about router advertisements if we want a real IPv6 address */
if ( (device->target_state == NM_IP6_DEVICE_GOT_ADDRESS)
&& (device->ra_flags & IF_RA_RCVD)) {
if (device->state < NM_IP6_DEVICE_GOT_ROUTER_ADVERTISEMENT)
device->state = NM_IP6_DEVICE_GOT_ROUTER_ADVERTISEMENT;
if (device->ra_flags & IF_RA_MANAGED) {
dhcp_opts = IP6_DHCP_OPT_MANAGED;
nm_log_dbg (LOGD_IP6, "router advertisement deferred to DHCPv6");
} else if (device->ra_flags & IF_RA_OTHERCONF) {
dhcp_opts = IP6_DHCP_OPT_OTHERCONF;
nm_log_dbg (LOGD_IP6, "router advertisement requests parallel DHCPv6");
}
}
if (!device->addrconf_complete) {
/* Managed mode (ie DHCP only) short-circuits automatic addrconf, so
* we don't bother waiting for the device's target state to be reached
* when the RA requests managed mode.
*/
if ( (device->state >= device->target_state)
|| (dhcp_opts == IP6_DHCP_OPT_MANAGED)) {
/* device->finish_addrconf_id may currently be a timeout
* rather than an idle, so we remove the existing source.
*/
if (device->finish_addrconf_id)
g_source_remove (device->finish_addrconf_id);
nm_log_dbg (LOGD_IP6, "(%s): reached target state or Managed-mode requested (state '%s') (dhcp opts 0x%X)",
device->iface, state_to_string (device->state),
dhcp_opts);
info = callback_info_new (device, dhcp_opts, TRUE);
device->finish_addrconf_id = g_idle_add_full (G_PRIORITY_DEFAULT_IDLE,
finish_addrconf,
info,
(GDestroyNotify) g_free);
}
} else if (config_changed) {
if (!device->config_changed_id) {
gboolean success = TRUE;
/* If for some reason an RA-provided address disappeared, we need
* to make sure we fail the connection as it's no longer valid.
*/
if ( (device->state == NM_IP6_DEVICE_GOT_ADDRESS)
&& (device->target_state == NM_IP6_DEVICE_GOT_ADDRESS)
&& !found_other) {
nm_log_dbg (LOGD_IP6, "(%s): RA-provided address no longer valid",
device->iface);
success = FALSE;
}
info = callback_info_new (device, dhcp_opts, success);
device->config_changed_id = g_idle_add_full (G_PRIORITY_DEFAULT_IDLE,
emit_config_changed,
info,
(GDestroyNotify) g_free);
}
}
}
NMIP6Config *
nm_ip6_manager_get_ip6_config (NMIP6Manager *manager, int ifindex)
{
NMIP6ManagerPrivate *priv;
NMIP6Device *device;
NMIP6Config *config;
struct rtnl_addr *rtnladdr;
struct nl_addr *nladdr;
struct in6_addr *addr;
NMIP6Address *ip6addr;
struct rtnl_route *rtnlroute;
struct nl_addr *nldest, *nlgateway;
struct in6_addr *dest, *gateway;
gboolean defgw_set = FALSE;
struct in6_addr defgw;
uint32_t metric;
NMIP6Route *ip6route;
int i;
g_return_val_if_fail (NM_IS_IP6_MANAGER (manager), NULL);
g_return_val_if_fail (ifindex > 0, NULL);
priv = NM_IP6_MANAGER_GET_PRIVATE (manager);
device = (NMIP6Device *) g_hash_table_lookup (priv->devices,
GINT_TO_POINTER (ifindex));
if (!device) {
nm_log_warn (LOGD_IP6, "(%d): addrconf not started.", ifindex);
return NULL;
}
config = nm_ip6_config_new ();
if (!config) {
nm_log_err (LOGD_IP6, "(%s): out of memory creating IP6 config object.",
device->iface);
return NULL;
}
/* Make sure we refill the route and address caches, otherwise we won't get
* up-to-date information here since the netlink route/addr change messages
* may be lagging a bit.
*/
nl_cache_refill (priv->nlh, priv->route_cache);
nl_cache_refill (priv->nlh, priv->addr_cache);
/* Add routes */
for (rtnlroute = FIRST_ROUTE (priv->route_cache); rtnlroute; rtnlroute = NEXT_ROUTE (rtnlroute)) {
/* Make sure it's an IPv6 route for this device */
if (rtnl_route_get_oif (rtnlroute) != device->ifindex)
continue;
if (rtnl_route_get_family (rtnlroute) != AF_INET6)
continue;
nldest = rtnl_route_get_dst (rtnlroute);
if (!nldest || nl_addr_get_family (nldest) != AF_INET6)
continue;
dest = nl_addr_get_binary_addr (nldest);
nlgateway = rtnl_route_get_gateway (rtnlroute);
if (!nlgateway || nl_addr_get_family (nlgateway) != AF_INET6)
continue;
gateway = nl_addr_get_binary_addr (nlgateway);
if (rtnl_route_get_dst_len (rtnlroute) == 0) {
/* Default gateway route; don't add to normal routes but to each address */
if (!defgw_set) {
memcpy (&defgw, gateway, sizeof (defgw));
defgw_set = TRUE;
}
continue;
}
/* Also ignore link-local routes where the destination and gateway are
* the same, which apparently get added by the kernel but return -EINVAL
* when we try to add them via netlink.
*/
if (gateway && IN6_ARE_ADDR_EQUAL (dest, gateway))
continue;
ip6route = nm_ip6_route_new ();
nm_ip6_route_set_dest (ip6route, dest);
nm_ip6_route_set_prefix (ip6route, rtnl_route_get_dst_len (rtnlroute));
nm_ip6_route_set_next_hop (ip6route, gateway);
rtnl_route_get_metric(rtnlroute, 1, &metric);
if (metric != UINT_MAX)
nm_ip6_route_set_metric (ip6route, metric);
nm_ip6_config_take_route (config, ip6route);
}
/* Add addresses */
for (rtnladdr = FIRST_ADDR (priv->addr_cache); rtnladdr; rtnladdr = NEXT_ADDR (rtnladdr)) {
if (rtnl_addr_get_ifindex (rtnladdr) != device->ifindex)
continue;
nladdr = rtnl_addr_get_local (rtnladdr);
if (!nladdr || nl_addr_get_family (nladdr) != AF_INET6)
continue;
addr = nl_addr_get_binary_addr (nladdr);
ip6addr = nm_ip6_address_new ();
nm_ip6_address_set_prefix (ip6addr, rtnl_addr_get_prefixlen (rtnladdr));
nm_ip6_address_set_address (ip6addr, addr);
nm_ip6_config_take_address (config, ip6addr);
if (defgw_set)
nm_ip6_address_set_gateway (ip6addr, &defgw);
}
/* Add DNS servers */
if (device->rdnss_servers) {
NMIP6RDNSS *rdnss = (NMIP6RDNSS *)(device->rdnss_servers->data);
for (i = 0; i < device->rdnss_servers->len; i++)
nm_ip6_config_add_nameserver (config, &rdnss[i].addr);
}
/* Add DNS domains */
if (device->dnssl_domains) {
NMIP6DNSSL *dnssl = (NMIP6DNSSL *)(device->dnssl_domains->data);
for (i = 0; i < device->dnssl_domains->len; i++)
nm_ip6_config_add_domain (config, dnssl[i].domain);
}
return config;
}
int TNlAddr::Family() const {
return Addr ? nl_addr_get_family(Addr) : AF_UNSPEC;
}
int main(int argc, char *argv[])
{
struct nl_sock *nl_sock;
struct nl_cache *link_cache;
int ifindex;
int ret = 0;
int err = 0;
if (argc < 2)
{
printf("%s ip gw on/off tip\n", argv[0]);
return -1;
}
//link
if (err = rtnl_route_read_table_names(ROUTE_TABLE)) {
printf("failed to read %s. err = %s\n", ROUTE_TABLE, nl_geterror(err));
return -1;;
}
nl_sock = nl_socket_alloc();
if (NULL == nl_sock) {
printf("failed to alloc netlink handler.\n");
return -1;
}
if (err = nl_connect(nl_sock, NETLINK_ROUTE)) {
printf("failed to connect NETLINK_ROUTE. err = %s\n", nl_geterror(err));
ret = -1;
goto release_nl;
}
if (err = rtnl_link_alloc_cache(nl_sock, AF_INET, &link_cache))
{
printf("failed to allocate link cache. err = %s\n", nl_geterror(err));
ret = -1;
goto release_nl;
}
ifindex = rtnl_link_name2i(link_cache, NAME);
if (0 == ifindex) {
printf("%s - failed to find.\n", NAME);
ret = -1;
goto release_link_cache;
}
struct rtnl_link * link = rtnl_link_get(link_cache, ifindex);
if (link == NULL)
{
printf("can't get link.\n");
ret = -1;
goto release_link_cache;
}
//rtnl_link_get_by_name
struct nl_addr *lladdr = rtnl_link_get_addr(link);
if (NULL == lladdr || AF_LLC != nl_addr_get_family(lladdr)) {
printf("failed to get MAC\n");
ret = -1;
goto release_link;
}
uint8_t mac_address[ETHER_ADDR_LEN];
memcpy(mac_address, nl_addr_get_binary_addr(lladdr), ETHER_ADDR_LEN);
printf("%02X:%02X:%02X:%02X:%02X:%02X\n",
mac_address[0],
mac_address[1],
mac_address[2],
mac_address[3],
mac_address[4],
mac_address[5]);
//addr
struct nl_cache * addr_cache;
if (err = rtnl_addr_alloc_cache(nl_sock, &addr_cache))
{
printf("fail to get addr_cache\n");
ret = -1;
goto release_link;
}
struct rtnl_addr *addr = rtnl_addr_alloc();
rtnl_addr_set_ifindex(addr, ifindex);
rtnl_addr_set_family(addr, AF_INET);
int prefixlen = 16;
nl_cache_foreach_filter(addr_cache, (struct nl_object *)addr, get_ip, &prefixlen);
nl_cache_free(addr_cache);
uint32_t ipaddr = inet_addr(argv[1]);
struct nl_addr * local = nl_addr_build(AF_INET, &ipaddr, sizeof(ipaddr));
rtnl_addr_set_local(addr, local);
rtnl_addr_set_ifindex(addr, ifindex);
rtnl_addr_set_family(addr, AF_INET);
rtnl_addr_set_prefixlen(addr, 32);
if (!strcmp(argv[2], "on"))
{
if (err = rtnl_addr_add(nl_sock, addr, 0))
{
printf("fail to add addr %s\n", nl_geterror(err));
ret = -1;
goto release_addr;
}
}
else
{
if (err = rtnl_addr_delete(nl_sock, addr, 0))
{
printf("fail to del addr %s\n", nl_geterror(err));
ret = -1;
goto release_addr;
}
}
//neigh
struct nl_cache * neigh_cache;
if (err = rtnl_neigh_alloc_cache(nl_sock, &neigh_cache))
{
printf("failed to allocate neighbor cache. err = %s\n", nl_geterror(err));
ret = -1;
goto release_neigh_cache;
}
uint32_t gw = inet_addr(argv[3]);
struct nl_addr * gw_addr = nl_addr_build(AF_INET, &gw, sizeof(gw));
struct rtnl_neigh * neigh = rtnl_neigh_get(neigh_cache, ifindex, gw_addr);
if (neigh) {
// It's optional
struct nl_addr * lladdr = rtnl_neigh_get_lladdr(neigh);
if (lladdr) {
uint8_t mac_address[ETHER_ADDR_LEN];
memcpy(mac_address, nl_addr_get_binary_addr(lladdr), ETHER_ADDR_LEN);
printf("gw %02X:%02X:%02X:%02X:%02X:%02X\n",
mac_address[0],
mac_address[1],
mac_address[2],
mac_address[3],
mac_address[4],
mac_address[5]);
}
}
nl_addr_put(gw_addr);
//route
struct nl_cache *route_cache;
if (err = rtnl_route_alloc_cache(nl_sock, AF_INET, 0, &route_cache))
{
printf("failed to allocate route cache. err = %s\n", nl_geterror(err));
ret = -1;
goto release_neigh_cache;
}
struct rtnl_route *route = rtnl_route_alloc();
struct nl_addr * taddr;
err = nl_addr_parse(argv[4], AF_INET, &taddr);
if (err)
{
printf("failed to get taddr. err = %s\n", nl_geterror(err));
ret = -1;
goto release_route_cache;
}
nl_cache_foreach_filter(route_cache, OBJ_CAST(route), get_route, NULL);
/*
struct nl_sock *nl_fib_sock;
nl_fib_sock = nl_socket_alloc();
if (err = nl_connect(nl_fib_sock, NETLINK_FIB_LOOKUP)) {
printf("failed to connect NETLINK_ROUTE. err = %s\n", nl_geterror(err));
ret = -1;
goto release_nl;
}
struct nl_dump_params params = {
.dp_fd = stdout,
.dp_type = NL_DUMP_DETAILS,
};
struct nl_cache *route_cache = flnl_result_alloc_cache();
struct flnl_request *req = flnl_request_alloc();
struct nl_addr * taddr;
err = nl_addr_parse(argv[4], AF_INET, &taddr);
if (err)
{
printf("failed to get taddr. err = %s\n", nl_geterror(err));
ret = -1;
goto release_route;
}
int table = RT_TABLE_UNSPEC, scope = RT_SCOPE_UNIVERSE;
flnl_request_set_addr(req, taddr);
flnl_request_set_table(req, table);
flnl_request_set_scope(req, scope);
err = flnl_lookup(nl_fib_sock, req, route_cache);
if (err)
{
printf("failed to fib lookup. err = %s\n", nl_geterror(err));
ret = -1;
goto release_route_addr;
}
nl_cache_dump(route_cache, ¶ms);
release_route_addr:
nl_addr_put(taddr);
release_route:
nl_cache_free(route_cache);
nl_object_put(OBJ_CAST(req));
nl_close(nl_fib_sock);
nl_socket_free(nl_fib_sock);
*/
release_route_cache:
nl_cache_free(route_cache);
release_neigh_cache:
nl_cache_free(neigh_cache);
release_addr:
nl_addr_put(local);
rtnl_addr_put(addr);
release_link:
rtnl_link_put(link);
release_link_cache:
nl_cache_free(link_cache);
release_nl:
nl_close(nl_sock);
nl_socket_free(nl_sock);
return ret;
}