static bool nl80211_init()
{
int err;
sock = nl_socket_alloc();
if (!sock) {
fprintf(stderr, "failed to allocate netlink socket\n");
goto out;
}
err = genl_connect(sock);
if (err) {
nl_perror(err, "failed to make generic netlink connection");
goto out;
}
err = genl_ctrl_alloc_cache(sock, &cache);
if (err) {
nl_perror(err, "failed to allocate netlink controller cache");
goto out;
}
family = genl_ctrl_search_by_name(cache, NL80211_GENL_NAME);
if (!family) {
fprintf(stderr, "failed to find nl80211\n");
goto out;
}
return true;
out:
genl_family_put(family);
nl_cache_free(cache);
nl_socket_free(sock);
return false;
}
static inline int __genl_ctrl_alloc_cache(struct nl_sock *h, struct nl_cache **cache) {
struct nl_cache *tmp = genl_ctrl_alloc_cache(h);
if (!tmp)
return -1;
*cache = tmp;
return 0;
}
int unl_genl_init(struct unl *unl, const char *family)
{
memset(unl, 0, sizeof(*unl));
if (unl_init(unl))
goto error_out;
unl->hdrlen = NLMSG_ALIGN(sizeof(struct genlmsghdr));
unl->family_name = strdup(family);
if (!unl->family_name)
goto error;
if (genl_connect(unl->sock))
goto error;
if (genl_ctrl_alloc_cache(unl->sock, &unl->cache))
goto error;
unl->family = genl_ctrl_search_by_name(unl->cache, family);
if (!unl->family)
goto error;
return 0;
error:
unl_free(unl);
error_out:
return -1;
}
static inline int __genl_ctrl_alloc_cache(struct nl_handle *h, struct nl_cache **cache)
{
struct nl_cache *tmp = genl_ctrl_alloc_cache(h);
if (!tmp)
return -ENOMEM;
*cache = tmp;
return 0;
}
static int nl80211_init(void)
{
int err, fd;
if (!nls)
{
nls = malloc(sizeof(struct nl80211_state));
if (!nls) {
err = -ENOMEM;
goto err;
}
memset(nls, 0, sizeof(*nls));
nls->nl_sock = nl_socket_alloc();
if (!nls->nl_sock) {
err = -ENOMEM;
goto err;
}
if (genl_connect(nls->nl_sock)) {
err = -ENOLINK;
goto err;
}
fd = nl_socket_get_fd(nls->nl_sock);
if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
err = -EINVAL;
goto err;
}
if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
err = -ENOMEM;
goto err;
}
nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
if (!nls->nl80211) {
err = -ENOENT;
goto err;
}
nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
if (!nls->nlctrl) {
err = -ENOENT;
goto err;
}
}
return 0;
err:
nl80211_close();
return err;
}
struct nl_cache *nltool_alloc_genl_family_cache(struct nl_handle *nlh)
{
struct nl_cache *cache;
cache = genl_ctrl_alloc_cache(nlh);
if (!cache)
fprintf(stderr, "Unable to retrieve genl family cache: %s\n",
nl_geterror());
else
nl_cache_mngt_provide(cache);
return cache;
}
int nl80211_connect(const char *interface, void **handle, void **cache,
void **family, char *errstr) {
#ifndef HAVE_LINUX_NETLINK
snprintf(errstr, LORCON_STATUS_MAX, "LORCON was not compiled with netlink/nl80211 "
"support, check the output of ./configure for why");
return -1;
#else
struct nl_sock *nl_handle;
struct nl_cache *nl_cache;
struct genl_family *nl80211;
if ((nl_handle = nl_socket_alloc()) == NULL) {
snprintf(errstr, LORCON_STATUS_MAX, "%s failed to allocate nlhandle",
__FUNCTION__);
return -1;
}
if (genl_connect(nl_handle)) {
snprintf(errstr, LORCON_STATUS_MAX, "%s failed to connect to generic netlink",
__FUNCTION__);
nl_socket_free(nl_handle);
return -1;
}
if (genl_ctrl_alloc_cache(nl_handle, &nl_cache) != 0) {
snprintf(errstr, LORCON_STATUS_MAX, "%s failed to allocate "
"generic netlink cache", __FUNCTION__);
nl_socket_free(nl_handle);
return -1;
}
if ((nl80211 = genl_ctrl_search_by_name(nl_cache, "nl80211")) == NULL) {
snprintf(errstr, LORCON_STATUS_MAX, "%s failed to find "
"nl80211 controls, kernel may be too old", __FUNCTION__);
nl_socket_free(nl_handle);
return -1;
}
(*handle) = (void *) nl_handle;
(*cache) = (void *) nl_cache;
(*family) = (void *) nl80211;
return 1;
#endif
}
static void nl80211_init(struct nl80211_state *state)
{
int ret;
state->nl_sock = nl80211_nl_socket_xalloc();
ret = genl_connect(state->nl_sock);
if (ret)
panic("Cannot connect generic netlink!\n");
ret = genl_ctrl_alloc_cache(state->nl_sock, &state->nl_cache);
if (ret < 0)
panic("Failed to allocate generic netlink cache: %s!",
nl_geterror(-ret));
state->nl80211 = genl_ctrl_search_by_name(state->nl_cache, "nl80211");
if (!state->nl80211)
panic("nl80211 not found in netlink cache!\n");
}
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;
}
int main(int argc, char *argv[])
{
struct nl_sock *sock;
struct nl_cache *cache;
struct nl_dump_params params = {
.dp_type = NL_DUMP_LINE,
.dp_fd = stdout,
};
if ((sock = nl_socket_alloc()) == 0)
ERRX("Failed nl_socket_alloc");
if (genl_connect(sock))
ERRX("Failed genl_connect");
if (genl_ctrl_alloc_cache(sock, &cache))
ERRX("Failed genl_ctrl_alloc_cache");
nl_cache_dump(cache, ¶ms);
return 0;
}
static int init_nl()
{
int err;
nl_soc = nl_socket_alloc();
if (!nl_soc) {
ALOGE("Failed to allocate netlink socket.");
return -ENOMEM;
}
if (genl_connect(nl_soc)) {
ALOGE("Failed to connect to generic netlink.");
err = -ENOLINK;
goto out_handle_destroy;
}
genl_ctrl_alloc_cache(nl_soc, &nl_cache);
if (!nl_cache) {
ALOGE("Failed to allocate generic netlink cache.");
err = -ENOMEM;
goto out_handle_destroy;
}
nl80211 = genl_ctrl_search_by_name(nl_cache, "nl80211");
if (!nl80211) {
ALOGE("nl80211 not found.");
err = -ENOENT;
goto out_cache_free;
}
return 0;
out_cache_free:
nl_cache_free(nl_cache);
out_handle_destroy:
nl_socket_free(nl_soc);
return err;
}
static int nl80211_init(struct nl80211_state *state)
{
int err;
state->nl_sock = nl_socket_alloc();
if (!state->nl_sock) {
fprintf(stderr, "Failed to allocate netlink socket.\n");
return -ENOMEM;
}
if (genl_connect(state->nl_sock)) {
fprintf(stderr, "Failed to connect to generic netlink.\n");
err = -ENOLINK;
goto out_handle_destroy;
}
if (genl_ctrl_alloc_cache(state->nl_sock, &state->nl_cache)) {
fprintf(stderr, "Failed to allocate generic netlink cache.\n");
err = -ENOMEM;
goto out_handle_destroy;
}
state->nl80211 = genl_ctrl_search_by_name(state->nl_cache, "nl80211");
if (!state->nl80211) {
fprintf(stderr, "nl80211 not found.\n");
err = -ENOENT;
goto out_cache_free;
}
return 0;
out_cache_free:
nl_cache_free(state->nl_cache);
out_handle_destroy:
nl_socket_free(state->nl_sock);
return err;
}
bool CNL80211::open() {
if (m_connected)
return true;
m_nlCallback = nl_cb_alloc(NL_CB_DEFAULT);
m_nlSocket = nl_socket_alloc();
if(!m_nlSocket) {
emit message("Could not create netlink socket");
return false;
}
if (!genl_connect(m_nlSocket)) {
emit message("Could not connect to generic netlink interface");
close();
return false;
}
if (genl_ctrl_alloc_cache(m_nlSocket, &m_nlCache)) {
emit message("Could not allocate generic netlink cache.");
close();
return false;
}
m_nlFamily = genl_ctrl_search_by_name(m_nlCache, "nl80211");
if (!m_nlFamily) {
emit message("Could not find nl80211");
close();
return false;
}
m_nlFd = nl_socket_get_fd(m_nlSocket);
m_nlSn = new QSocketNotifier(m_nlFd,QSocketNotifier::Read,this);
connect(m_nlSn,SIGNAL(activated(int)), this, SLOT(readNlMessage(void)));
//Start Signal Quality polling
m_sqTimerId = startTimer(m_sqPollrate);
m_connected = true;
return true;
}
static int
wprobe_init(void)
{
int ret;
if (n_devs++ > 0)
return 0;
handle = nl_socket_alloc();
if (!handle) {
DPRINTF("Failed to create handle\n");
goto err;
}
if (genl_connect(handle)) {
DPRINTF("Failed to connect to generic netlink\n");
goto err;
}
ret = genl_ctrl_alloc_cache(handle, &cache);
if (ret < 0) {
DPRINTF("Failed to allocate netlink cache\n");
goto err;
}
family = genl_ctrl_search_by_name(cache, "wprobe");
if (!family) {
DPRINTF("wprobe API not present\n");
goto err;
}
return 0;
err:
wprobe_free();
return -EINVAL;
}