int main(int argc, char *argv[])
{
struct nl_sock *h[1025];
int i;
h[0] = nl_handle_alloc();
printf("Created handle with port 0x%x\n",
nl_socket_get_local_port(h[0]));
nl_handle_destroy(h[0]);
h[0] = nl_handle_alloc();
printf("Created handle with port 0x%x\n",
nl_socket_get_local_port(h[0]));
nl_handle_destroy(h[0]);
for (i = 0; i < 1025; i++) {
h[i] = nl_handle_alloc();
if (h[i] == NULL)
nl_perror("Unable to allocate socket");
else
printf("Created handle with port 0x%x\n",
nl_socket_get_local_port(h[i]));
}
return 0;
}
NetLinkManager::NetLinkManager()
: _initialized(false), _sock(NULL), _refresh_cache(false)
{
ibrcommon::MutexLock l(_call_mutex);
_handle = nl_handle_alloc();
nl_connect(_handle, NETLINK_ROUTE);
_link_cache = rtnl_link_alloc_cache(_handle);
if (_link_cache == NULL)
{
nl_close(_handle);
nl_handle_destroy(_handle);
throw ibrcommon::vsocket_exception("netlink cache allocation failed");
}
_addr_cache = rtnl_addr_alloc_cache(_handle);
if (_addr_cache == NULL)
{
nl_close(_handle);
nl_handle_destroy(_handle);
nl_cache_free(_link_cache);
_link_cache = NULL;
throw ibrcommon::vsocket_exception("netlink cache allocation failed");
}
_initialized = true;
// create a new socket for the netlink interface
_sock = new ibrcommon::vsocket();
}
int
kern_bcache_init()
{
supsocket_t *sock;
nl_bcache = nl_handle_alloc();
nl_disable_sequence_check(nl_bcache);
nl_join_groups(nl_bcache, ~0);
nl_cb_set(nl_handle_get_cb(nl_bcache), NL_CB_VALID, NL_CB_CUSTOM,
nl_bcache_event, NULL);
if (nl_connect(nl_bcache, NETLINK_IP6MBLTY) < 0) {
debug_log(1, "nl_connect(NETLINK_IP6MBLTY) failed: %s.\n",
strerror(errno));
nl_close(nl_bcache);
nl_bcache = NULL;
return -1;
}
fcntl(nl_handle_get_fd(nl_bcache), F_SETFL, O_NONBLOCK);
sock = support_register_socket(nl_handle_get_fd(nl_bcache),
nl_bcache_events_waiting, NULL, NULL);
sock->mode = SUPSOCKET_READ;
return 0;
}
void lowpansocket::getAddress(struct ieee802154_addr *ret, const vinterface &iface)
{
#if defined HAVE_LIBNL || HAVE_LIBNL3
#ifdef HAVE_LIBNL3
struct nl_sock *nl = nl_socket_alloc();
#else
struct nl_handle *nl = nl_handle_alloc();
#endif
unsigned char *buf = NULL;
struct sockaddr_nl nla;
struct nlattr *attrs[IEEE802154_ATTR_MAX+1];
struct genlmsghdr *ghdr;
struct nlmsghdr *nlh;
struct nl_msg *msg;
int family;
if (!nl)
return;
genl_connect(nl);
/* Build and send message */
msg = nlmsg_alloc();
family = genl_ctrl_resolve(nl, "802.15.4 MAC");
genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0, NLM_F_ECHO, IEEE802154_LIST_IFACE, 1);
nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, iface.toString().c_str());
nl_send_auto_complete(nl, msg);
nlmsg_free(msg);
/* Receive and parse answer */
nl_recv(nl, &nla, &buf, NULL);
nlh = (struct nlmsghdr*)buf;
genlmsg_parse(nlh, 0, attrs, IEEE802154_ATTR_MAX, ieee802154_policy);
ghdr = (genlmsghdr*)nlmsg_data(nlh);
if (!attrs[IEEE802154_ATTR_SHORT_ADDR] || !attrs[IEEE802154_ATTR_SHORT_ADDR])
return;
// We only handle short addresses right now
ret->addr_type = IEEE802154_ADDR_SHORT;
ret->pan_id = nla_get_u16(attrs[IEEE802154_ATTR_PAN_ID]);
ret->short_addr = nla_get_u16(attrs[IEEE802154_ATTR_SHORT_ADDR]);
free(buf);
nl_close(nl);
#ifdef HAVE_LIBNL3
nl_socket_free(nl);
#else
nl_handle_destroy(nl);
#endif
#endif
}
int init_handle(struct nl_handle **handle)
{
*handle = nl_handle_alloc();
if (!*handle)
return -1;
if (nl_connect(*handle, NETLINK_ROUTE)) {
nl_handle_destroy(*handle);
return -1;
}
return 0;
}
int main(int argc, char *argv[])
{
struct nl_handle *h;
int i;
for (i = 0; i < 1025; i++) {
h = nl_handle_alloc();
printf("Created handle with port 0x%x\n",
nl_socket_get_local_port(h));
}
return 0;
}
void NetLinkManager::run()
{
struct nl_handle *handle = nl_handle_alloc();
nl_connect(handle, NETLINK_ROUTE);
// init route messages
nl_socket_add_membership(handle, RTNLGRP_IPV4_IFADDR);
// IPv6 requires further support in the parsing procedures!
// nl_socket_add_membership(handle, RTNLGRP_IPV6_IFADDR);
nl_socket_add_membership(handle, RTNLGRP_LINK);
// add netlink fd to vsocket
_sock->add(nl_socket_get_fd(handle));
try {
while (_initialized)
{
std::list<int> fds;
_sock->select(fds, NULL);
int fd = fds.front();
// create a new event object
NetLinkManagerEvent lme(fd);
// ignore if the event is unknown
if (lme.getType() == LinkManagerEvent::EVENT_UNKOWN) continue;
// ignore if this is an wireless extension event
if (lme.isWirelessExtension()) continue;
// need to refresh the cache
{
ibrcommon::MutexLock l(_call_mutex);
_refresh_cache = true;
}
// print out some debugging
IBRCOMMON_LOGGER_DEBUG(10) << lme.toString() << IBRCOMMON_LOGGER_ENDL;
// notify all subscribers about this event
raiseEvent(lme);
}
} catch (const vsocket_exception&) {
// stopped / interrupted
IBRCOMMON_LOGGER(error) << "NetLink connection stopped" << IBRCOMMON_LOGGER_ENDL;
}
nl_close(handle);
nl_handle_destroy(handle);
}
/*
* Return a libnl handle for NETLINK_ROUTE.
*/
static struct nl_handle *_iface_get_handle(void) {
struct nl_handle *handle = NULL;
if ((handle = nl_handle_alloc()) == NULL) {
return NULL;
}
if (nl_connect(handle, NETLINK_ROUTE)) {
nl_handle_destroy(handle);
return NULL;
}
return handle;
}
static struct nl_handle *init_netlink(void)
{
struct nl_handle *handle;
int ret, multicast_id;
handle = nl_handle_alloc();
if (!handle){
elog("Cannot allocate netlink handle!\n");
return NULL;
}
nl_disable_sequence_check(handle);
ret = genl_connect(handle);
if (ret < 0){
elog("Cannot connect to netlink socket\n");
return NULL;
}
/*
familyid = genl_ctrl_resolve(handle, SAMPLE_NL_FAMILY_NAME);
if (!familyid){
elog("Cannot resolve family name(%s)\n", SAMPLE_NL_FAMILY_NAME);
return NULL;
}
dlog("familyid %d\n", familyid);
*/
multicast_id = nl_get_multicast_id(handle, SAMPLE_NL_FAMILY_NAME, SAMPLE_NL_GRP_NAME);
if (multicast_id < 0){
elog("Cannot resolve grp name(%d)\n", SAMPLE_NL_GRP_NAME);
return NULL;
}
ret = nl_socket_add_membership(handle, multicast_id);
if (ret < 0){
elog("Cannot join fs multicast group\n");
return NULL;
}
ret = nl_socket_modify_cb(handle, NL_CB_VALID, NL_CB_CUSTOM,
sample_nl_cb, NULL);
if (ret < 0){
elog("Cannot register callback for"
" netlink messages\n");
return NULL;
}
return handle;
}
int main() {
struct nl_handle *handle;
struct nl_msg *msg;
struct myhdr {
char mychar[20];
} *hdr;
int id;
handle = nl_handle_alloc();
if (handle == NULL)
goto open_failure;
if (genl_connect(handle) != 0)
goto open_failure;
id = genl_ctrl_resolve(handle, "CONTROL_EXMPL");
if(id < 0) {
perror("genl_ctrl_resolve\n");
goto open_failure;
}
else
printf("id %i\n", id);
msg = nlmsg_alloc();
memset(msg, 0, 16);
int pid = getpid();
int seq = 1;
hdr = genlmsg_put(msg, pid, seq, id, sizeof(struct myhdr), NLM_F_REQUEST, 1, 1);
memcpy(hdr->mychar, "hello world", strlen("hello world") + 1);
int ret = nl_send(handle, msg);
printf("message sent %i\n", ret);
nlmsg_free(msg);
return 0;
open_failure:
if (handle) {
nl_close(handle);
nl_handle_destroy(handle);
}
printf("Erreur open_failure\n");
return 0;
}
int usnic_rtnl_sk_alloc(struct usnic_rtnl_sk **p_sk)
{
struct usnic_rtnl_sk *unlsk;
struct nl_handle *nlh;
int err;
unlsk = calloc(1, sizeof(*unlsk));
if (!unlsk) {
usnic_err("Failed to allocate usnic_rtnl_sk struct\n");
return -ENOMEM;
}
nlh = nl_handle_alloc();
if (!nlh) {
usnic_err("Failed to allocate nl handle\n");
err = -ENOMEM;
goto err_free_unlsk;
}
err = nl_connect(nlh, NETLINK_ROUTE);
if (err < 0) {
usnic_err("Failed to connnect netlink route socket\n");
goto err_free_nlh;
}
nl_disable_sequence_check(nlh);
err = nl_set_recv_timeout(nlh);
if (err < 0)
goto err_close_nlh;
unlsk->nlh = nlh;
unlsk->seq = time(NULL);
*p_sk = unlsk;
return 0;
err_close_nlh:
nl_close(nlh);
err_free_nlh:
nl_handle_destroy(nlh);
err_free_unlsk:
free(unlsk);
return err;
}
static int netlink_init(void)
{
info("Starting experimental netlink support");
handle = nl_handle_alloc();
if (!handle) {
error("Failed to allocate netlink handle");
return -ENOMEM;
}
if (genl_connect(handle) < 0) {
error("Failed to connect to generic netlink");
nl_handle_destroy(handle);
return -ENOLINK;
}
cache = genl_ctrl_alloc_cache(handle);
if (!cache) {
error("Failed to allocate generic netlink cache");
return -ENOMEM;
nl_handle_destroy(handle);
}
family = genl_ctrl_search_by_name(cache, "bluetooth");
if (!family) {
error("Failed to find Bluetooth netlink family");
nl_cache_free(cache);
nl_handle_destroy(handle);
return -ENOENT;
}
if (create_channel(nl_socket_get_fd(handle)) < 0) {
error("Failed to create netlink IO channel");
genl_family_put(family);
nl_cache_free(cache);
nl_handle_destroy(handle);
return -ENOMEM;
}
return 0;
}
/**
* Connects to the NETLINK interface. This will be called
* for each etherinfo object being generated, and it will
* keep a separate file descriptor open for each object
*
* @param data etherinfo_obj_data structure
*
* @return Returns 1 on success, otherwise 0.
*/
int open_netlink(struct etherinfo_obj_data *data)
{
if( !data ) {
return 0;
}
/* Reuse already established NETLINK connection, if a connection exists */
if( *data->nlc ) {
/* If this object has not used NETLINK earlier, tag it as a user */
if( !data->nlc_active ) {
pthread_mutex_lock(&nlc_counter_mtx);
(*data->nlc_users)++;
pthread_mutex_unlock(&nlc_counter_mtx);
}
data->nlc_active = 1;
return 1;
}
/* No earlier connections exists, establish a new one */
*data->nlc = nl_handle_alloc();
nl_connect(*data->nlc, NETLINK_ROUTE);
if( (*data->nlc != NULL) ) {
/* Force O_CLOEXEC flag on the NETLINK socket */
if( fcntl(nl_socket_get_fd(*data->nlc), F_SETFD, FD_CLOEXEC) == -1 ) {
fprintf(stderr,
"**WARNING** Failed to set O_CLOEXEC on NETLINK socket: %s\n",
strerror(errno));
}
/* Tag this object as an active user */
pthread_mutex_lock(&nlc_counter_mtx);
(*data->nlc_users)++;
pthread_mutex_unlock(&nlc_counter_mtx);
data->nlc_active = 1;
return 1;
} else {
return 0;
}
}
static int
tcpTable_load_netlink(void)
{
/* TODO: perhaps use permanent nl handle? */
struct nl_handle *nl = nl_handle_alloc();
struct inet_diag_req req = {
.idiag_family = AF_INET,
.idiag_states = TCP_ALL,
};
struct nl_msg *nm;
struct sockaddr_nl peer;
unsigned char *buf = NULL;
int running = 1, len;
if (nl == NULL) {
DEBUGMSGTL(("mibII/tcpTable", "Failed to allocate netlink handle\n"));
snmp_log(LOG_ERR, "snmpd: Failed to allocate netlink handle\n");
return -1;
}
if (nl_connect(nl, NETLINK_INET_DIAG) < 0) {
DEBUGMSGTL(("mibII/tcpTable", "Failed to connect to netlink: %s\n", nl_geterror()));
snmp_log(LOG_ERR, "snmpd: Couldn't connect to netlink: %s\n", nl_geterror());
nl_handle_destroy(nl);
return -1;
}
nm = nlmsg_alloc_simple(TCPDIAG_GETSOCK, NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST);
nlmsg_append(nm, &req, sizeof(struct inet_diag_req), 0);
if (nl_send_auto_complete(nl, nm) < 0) {
DEBUGMSGTL(("mibII/tcpTable", "nl_send_autocomplete(): %s\n", nl_geterror()));
snmp_log(LOG_ERR, "snmpd: nl_send_autocomplete(): %s\n", nl_geterror());
nl_handle_destroy(nl);
return -1;
}
nlmsg_free(nm);
while (running) {
struct nlmsghdr *h;
if ((len = nl_recv(nl, &peer, &buf, NULL)) <= 0) {
DEBUGMSGTL(("mibII/tcpTable", "nl_recv(): %s\n", nl_geterror()));
snmp_log(LOG_ERR, "snmpd: nl_recv(): %s\n", nl_geterror());
nl_handle_destroy(nl);
return -1;
}
h = (struct nlmsghdr*)buf;
while (nlmsg_ok(h, len)) {
struct inet_diag_msg *r = nlmsg_data(h);
struct inpcb pcb, *nnew;
if (h->nlmsg_type == NLMSG_DONE) {
running = 0;
break;
}
r = nlmsg_data(h);
if (r->idiag_family != AF_INET) {
h = nlmsg_next(h, &len);
continue;
}
memcpy(&pcb.inp_laddr.s_addr, r->id.idiag_src, r->idiag_family == AF_INET ? 4 : 6);
memcpy(&pcb.inp_faddr.s_addr, r->id.idiag_dst, r->idiag_family == AF_INET ? 4 : 6);
pcb.inp_lport = r->id.idiag_sport;
pcb.inp_fport = r->id.idiag_dport;
pcb.inp_state = (r->idiag_state & 0xf) < 12 ? linux_states[r->idiag_state & 0xf] : 2;
if (pcb.inp_state == 5 /* established */ ||
pcb.inp_state == 8 /* closeWait */ )
tcp_estab++;
pcb.uid = r->idiag_uid;
nnew = SNMP_MALLOC_TYPEDEF(struct inpcb);
if (nnew == NULL) {
running = 0;
/* XXX report malloc error and return -1? */
break;
}
memcpy(nnew, &pcb, sizeof(struct inpcb));
nnew->inp_next = tcp_head;
tcp_head = nnew;
h = nlmsg_next(h, &len);
}
free(buf);
}
nl_handle_destroy(nl);
if (tcp_head) {
DEBUGMSGTL(("mibII/tcpTable", "Loaded TCP Table using netlink\n"));
return 0;
}
DEBUGMSGTL(("mibII/tcpTable", "Failed to load TCP Table (netlink)\n"));
return -1;
}
/**
* Setups generic netlink connection with the kernel module and retrieves assocaited family id
*
* @return 0 on success
*/
static int initialize_netlink_family(void) {
struct nl_handle* hndl;
struct nl_msg* msg = NULL;
struct nl_msg *ans_msg = NULL;
struct nlmsghdr *nl_hdr;
struct genlmsghdr* genl_hdr;
struct nlattr *nla;
int ret_val = 0;
hndl = nl_handle_alloc();
nl_set_buffer_size(hndl, 15000000, 15000000);
//nl_handle_set_peer_pid(hndl, 0);
//nl_set_passcred(hndl, 1);
nl_disable_sequence_check(hndl);
if ( (ret_val=nl_connect(hndl, NETLINK_GENERIC)) )
goto init_return;
nl_set_buffer_size(hndl, 15000000, 15000000);
if ( (ret_val=prepare_request_message(hndl, CTRL_CMD_GETFAMILY, GENL_ID_CTRL, &msg) ) != 0 ) {
goto init_return;
}
ret_val = nla_put_string(msg,
CTRL_ATTR_FAMILY_NAME,
"DIRECTORCHNL");
if (ret_val != 0)
goto init_return;
if ( (ret_val = send_request_message(hndl, msg, 0) ) != 0 )
goto init_return;
if ( (ret_val = read_message(hndl, &ans_msg) ) != 0 )
goto init_return;
genl_hdr = nl_msg_genlhdr(ans_msg);
if (genl_hdr == NULL || genl_hdr->cmd != CTRL_CMD_NEWFAMILY) {
ret_val = -EBADMSG;
goto init_return;
}
nla = nlmsg_find_attr(nlmsg_hdr(ans_msg), sizeof(struct genlmsghdr), CTRL_ATTR_FAMILY_ID);
if (nla == NULL) {
ret_val = -EBADMSG;
goto init_return;
}
state.gnl_fid = nla_get_u16(nla);
if (state.gnl_fid == 0) {
ret_val = -EBADMSG;
goto init_return;
}
state.handle = hndl;
return 0;
init_return:
nlmsg_free(ans_msg);
if ( state.handle == NULL ) {
nl_close(hndl);
nl_handle_destroy(hndl);
}
return -EINVAL;
}
static inline struct nl_handle *nl_socket_alloc(void)
{
return nl_handle_alloc();
}
void new_comunication(){
sock = nl_handle_alloc ();
genl_connect ( sock );
family = genl_ctrl_resolve ( sock , " SNF_GENL " );
msg = nlmsg_alloc();
}
int nlComm(struct nl_msg *nl_msg,
unsigned char **respbuf, unsigned int *respbuflen,
int nl_pid)
{
int rc = 0;
struct sockaddr_nl nladdr = {
.nl_family = AF_NETLINK,
.nl_pid = nl_pid,
.nl_groups = 0,
};
ssize_t nbytes;
struct timeval tv = {
.tv_sec = NETLINK_ACK_TIMEOUT_S,
};
fd_set readfds;
int fd;
int n;
struct nlmsghdr *nlmsg = nlmsg_hdr(nl_msg);
struct nl_handle *nlhandle = nl_handle_alloc();
if (!nlhandle) {
virReportSystemError(errno,
"%s", _("cannot allocate nlhandle for netlink"));
return -1;
}
if (nl_connect(nlhandle, NETLINK_ROUTE) < 0) {
virReportSystemError(errno,
"%s", _("cannot connect to netlink socket"));
rc = -1;
goto err_exit;
}
nlmsg_set_dst(nl_msg, &nladdr);
nlmsg->nlmsg_pid = getpid();
nbytes = nl_send_auto_complete(nlhandle, nl_msg);
if (nbytes < 0) {
virReportSystemError(errno,
"%s", _("cannot send to netlink socket"));
rc = -1;
goto err_exit;
}
fd = nl_socket_get_fd(nlhandle);
FD_ZERO(&readfds);
FD_SET(fd, &readfds);
n = select(fd + 1, &readfds, NULL, NULL, &tv);
if (n <= 0) {
if (n < 0)
virReportSystemError(errno, "%s",
_("error in select call"));
if (n == 0)
virReportSystemError(ETIMEDOUT, "%s",
_("no valid netlink response was received"));
rc = -1;
goto err_exit;
}
*respbuflen = nl_recv(nlhandle, &nladdr, respbuf, NULL);
if (*respbuflen <= 0) {
virReportSystemError(errno,
"%s", _("nl_recv failed"));
rc = -1;
}
err_exit:
if (rc == -1) {
VIR_FREE(*respbuf);
*respbuf = NULL;
*respbuflen = 0;
}
nl_handle_destroy(nlhandle);
return rc;
}
#else
int nlComm(struct nl_msg *nl_msg ATTRIBUTE_UNUSED,
unsigned char **respbuf ATTRIBUTE_UNUSED,
unsigned int *respbuflen ATTRIBUTE_UNUSED,
int nl_pid ATTRIBUTE_UNUSED)
{
netlinkError(VIR_ERR_INTERNAL_ERROR, "%s",
# if defined(__linux__) && !defined(HAVE_LIBNL)
_("nlComm is not supported since libnl was not available"));
# else
_("nlComm is not supported on non-linux platforms"));
# endif
return -1;
}
struct nl_handle *nltool_alloc_handle(void)
{
return nl_handle_alloc();
}
int netlink_wrapper::open_channel()
{
auto_unlocker lock(m_cache_lock);
nl_logdbg("opening netlink channel");
/*
// build to subscriptions groups mask for indicating what type of events the kernel will send on channel
unsigned subscriptions = ~RTMGRP_TC;
if (netlink_route_group_mask & nlgrpLINK) {
subscriptions |= (1 << (RTNLGRP_LINK - 1));
}
if (netlink_route_group_mask & nlgrpADDRESS) {
if (!m_preferred_family || m_preferred_family == AF_INET)
subscriptions |= (1 << (RTNLGRP_IPV4_IFADDR - 1));
if (!m_preferred_family || m_preferred_family == AF_INET6)
subscriptions |= (1 << (RTNLGRP_IPV6_IFADDR - 1));
}
if (netlink_route_group_mask & nlgrpROUTE) {
if (!m_preferred_family || m_preferred_family == AF_INET)
subscriptions |= (1 << (RTNLGRP_IPV4_ROUTE - 1));
if (!m_preferred_family || m_preferred_family == AF_INET6)
subscriptions |= (1 << (RTNLGRP_IPV4_ROUTE - 1));
}
if (netlink_route_group_mask & nlgrpPREFIX) {
if (!m_preferred_family || m_preferred_family == AF_INET6)
subscriptions |= (1 << (RTNLGRP_IPV6_PREFIX - 1));
}
if (netlink_route_group_mask & nlgrpNEIGH) {
subscriptions |= (1 << (RTNLGRP_NEIGH - 1));
}
*/
// Allocate a new netlink handle
m_handle = nl_handle_alloc();
BULLSEYE_EXCLUDE_BLOCK_START
if (m_handle == NULL) {
nl_logerr("failed to allocate netlink handle, nl_errno=%d", nl_get_errno());
return -1;
}
BULLSEYE_EXCLUDE_BLOCK_END
// set internal structure to pass the handle with callbacks from netlink
g_nl_rcv_arg.handle = m_handle;
// if multiple handles being allocated then a unique netlink PID need to be provided
// If port is 0, a unique port identifier will be generated automatically as a unique PID
nl_socket_set_local_port(m_handle, 0);
//Disables checking of sequence numbers on the netlink handle.
//This is required to allow messages to be processed which were not requested by a preceding request message, e.g. netlink events.
nl_disable_sequence_check(m_handle);
//joining group
//nl_join_groups(m_handle, 0);
// Allocate a new cache manager for RTNETLINK
// NL_AUTO_PROVIDE = automatically provide the caches added to the manager.
m_mngr = nl_cache_mngr_alloc(m_handle, NETLINK_ROUTE, NL_AUTO_PROVIDE);
BULLSEYE_EXCLUDE_BLOCK_START
if (!m_mngr) {
nl_logerr("Fail to allocate cac he manager");
return -1;
}
BULLSEYE_EXCLUDE_BLOCK_END
nl_logdbg("netlink socket is open");
m_cache_neigh = nl_cache_mngr_add(m_mngr, "route/neigh", neigh_cache_callback);
m_cache_link = nl_cache_mngr_add(m_mngr, "route/link", link_cache_callback);
m_cache_route = nl_cache_mngr_add(m_mngr, "route/route", route_cache_callback);
// set custom callback for every message to update message
nl_socket_modify_cb(m_handle, NL_CB_MSG_IN, NL_CB_CUSTOM, nl_msg_rcv_cb ,NULL);
// set the socket non-blocking
BULLSEYE_EXCLUDE_BLOCK_START
if (nl_socket_set_nonblocking(m_handle)) {
nl_logerr("Failed to set the socket non-blocking");
return -1;
}
BULLSEYE_EXCLUDE_BLOCK_END
return 0;
}
