[2/2] batctl: Use netlink when available, rather than debugfs

diff --git a/Makefile b/Makefile
index b82c0c6..debca29 100755
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,7 @@  export CONFIG_BATCTL_BISECT=n
 
 # batctl build
 BINARY_NAME = batctl
-OBJ = main.o bat-hosts.o functions.o sys.o debug.o ping.o traceroute.o tcpdump.o  hash.o debugfs.o ioctl.o list-batman.o translate.o
+OBJ = main.o bat-hosts.o functions.o sys.o debug.o ping.o traceroute.o tcpdump.o  hash.o debugfs.o ioctl.o list-batman.o translate.o netlink.o
 OBJ_BISECT = bisect_iv.o
 MANPAGE = man/batctl.8
 
@@ -43,6 +43,13 @@  ifndef V
 endif
 endif
 
+KERNELPATH ?= /lib/modules/$(shell uname -r)/build
+# sanity check: does KERNELPATH exist?
+ifeq ($(shell cd $(KERNELPATH) && pwd),)
+$(warning $(KERNELPATH) is missing, please set KERNELPATH)
+endif
+CFLAGS += -I $(KERNELPATH)/include/uapi/linux/
+
 ifeq ($(origin PKG_CONFIG), undefined)
   PKG_CONFIG = pkg-config
   ifeq ($(shell which $(PKG_CONFIG) 2>/dev/null),)
@@ -61,6 +68,17 @@  endif
 CFLAGS += $(LIBNL_CFLAGS)
 LDLIBS += $(LIBNL_LDLIBS)
 
+ifeq ($(origin LIBNL_GENL_CFLAGS) $(origin LIBNL_GENL_LDLIBS), undefined undefined)
+  LIBNL_GENL_NAME ?= libnl-genl-3.0
+  ifeq ($(shell $(PKG_CONFIG) --modversion $(LIBNL_GENL_NAME) 2>/dev/null),)
+    $(error No $(LIBNL_GENL_NAME) development libraries found!)
+  endif
+  LIBNL_GENL_CFLAGS += $(shell $(PKG_CONFIG) --cflags $(LIBNL_GENL_NAME))
+  LIBNL_GENL_LDLIBS += $(shell $(PKG_CONFIG) --libs $(LIBNL_GENL_NAME))
+endif
+CFLAGS += $(LIBNL_GENL_CFLAGS)
+LDLIBS += $(LIBNL_GENL_LDLIBS)
+
 # standard build tools
 ifeq ($(CONFIG_BATCTL_BISECT),y)
 OBJ += $(OBJ_BISECT)
diff --git a/debug.c b/debug.c
index 3db3ed9..5d08b42 100644
--- a/debug.c
+++ b/debug.c
@@ -23,10 +23,12 @@ 
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <errno.h>
 
 #include "debug.h"
 #include "debugfs.h"
 #include "functions.h"
+#include "netlink.h"
 #include "sys.h"
 
 const struct debug_table_data batctl_debug_tables[BATCTL_TABLE_NUM] = {
@@ -35,36 +37,42 @@  const struct debug_table_data batctl_debug_tables[BATCTL_TABLE_NUM] = {
 		.opt_short = "n",
 		.debugfs_name = "neighbors",
 		.header_lines = 2,
+		.netlink_fn = netlink_print_neighbors,
 	},
 	{
 		.opt_long = "originators",
 		.opt_short = "o",
 		.debugfs_name = "originators",
 		.header_lines = 2,
+		.netlink_fn = netlink_print_originators,
 	},
 	{
 		.opt_long = "gateways",
 		.opt_short = "gwl",
 		.debugfs_name = "gateways",
 		.header_lines = 1,
+		.netlink_fn = netlink_print_gateways,
 	},
 	{
 		.opt_long = "translocal",
 		.opt_short = "tl",
 		.debugfs_name = "transtable_local",
 		.header_lines = 2,
+		.netlink_fn = netlink_print_translocal,
 	},
 	{
 		.opt_long = "transglobal",
 		.opt_short = "tg",
 		.debugfs_name = "transtable_global",
 		.header_lines = 2,
+		.netlink_fn = netlink_print_transglobal,
 	},
 	{
 		.opt_long = "claimtable",
 		.opt_short = "cl",
 		.debugfs_name = "bla_claim_table",
 		.header_lines = 2,
+		.netlink_fn = netlink_print_bla_claim,
 	},
 	{
 		.opt_long = "backbonetable",
@@ -115,7 +123,7 @@  int handle_debug_table(char *mesh_iface, int debug_table, int argc, char **argv)
 	char *orig_iface = NULL;
 	float orig_timeout = 0.0f;
 	float watch_interval = 1;
-	opterr = 0;
+	int err;
 
 	while ((optchar = getopt(argc, argv, "hnw:t:Humi:")) != -1) {
 		switch (optchar) {
@@ -220,12 +228,19 @@  int handle_debug_table(char *mesh_iface, int debug_table, int argc, char **argv)
 		debugfs_make_path(DEBUG_BATIF_PATH_FMT "/", orig_iface, full_path, sizeof(full_path));
 	else
 		debugfs_make_path(DEBUG_BATIF_PATH_FMT "/", mesh_iface, full_path, sizeof(full_path));
+
+	if (batctl_debug_tables[debug_table].netlink_fn) {
+		err = batctl_debug_tables[debug_table].netlink_fn(
+			mesh_iface, read_opt, orig_timeout, watch_interval);
+		if (err != EOPNOTSUPP)
+			return err;
+	}
 	return read_file(full_path, (char *)batctl_debug_tables[debug_table].debugfs_name,
 			 read_opt, orig_timeout, watch_interval,
 			 batctl_debug_tables[debug_table].header_lines);
 }
 
-int print_routing_algos(void) {
+int debug_print_routing_algos(void) {
 	char full_path[MAX_PATH+1];
 	char *debugfs_mnt;
 
diff --git a/debug.h b/debug.h
index df65f50..b09def7 100644
--- a/debug.h
+++ b/debug.h
@@ -48,13 +48,15 @@  struct debug_table_data {
        const char opt_short[OPT_SHORT_MAX_LEN];
        const char debugfs_name[DEBUG_TABLE_PATH_MAX_LEN];
        size_t header_lines;
+       int (*netlink_fn)(char *mesh_iface, int read_opt,
+			 float orig_timeout, float watch_interval);
 };
 
 extern const struct debug_table_data batctl_debug_tables[BATCTL_TABLE_NUM];
 
 int handle_debug_table(char *mesh_iface, int debug_table, int argc, char **argv);
 int log_print(char *mesh_iface, int argc, char **argv);
-int print_routing_algos(void);
+int debug_print_routing_algos(void);
 int print_vis_info(char *mesh_iface);
 
 #endif
diff --git a/functions.c b/functions.c
index be8f8b0..df7d159 100644
--- a/functions.c
+++ b/functions.c
@@ -52,6 +52,7 @@ 
 #include "sys.h"
 #include "debug.h"
 #include "debugfs.h"
+#include "netlink.h"
 
 static struct timeval start_time;
 static char *host_name;
@@ -849,3 +850,13 @@  err:
 
 	return arg.vid;
 }
+
+int print_routing_algos(void)
+{
+	int err;
+
+	err = netlink_print_routing_algos();
+	if (err == EOPNOTSUPP)
+		err = debug_print_routing_algos();
+	return err;
+}
diff --git a/functions.h b/functions.h
index d0b05b9..1e6cfec 100644
--- a/functions.h
+++ b/functions.h
@@ -44,6 +44,7 @@  struct ether_addr *translate_mac(char *mesh_iface, struct ether_addr *mac);
 struct ether_addr *resolve_mac(const char *asc);
 int vlan_get_link(const char *ifname, char **parent);
 
+int print_routing_algos(void);
 extern char *line_ptr;
 
 enum {
diff --git a/main.h b/main.h
index 81f223c..a05d1f0 100644
--- a/main.h
+++ b/main.h
@@ -47,6 +47,7 @@ 
 #endif
 
 #define __packed __attribute((packed))   /* linux kernel compat */
+#define __unused __attribute__((unused))
 #define BIT(nr)                 (1UL << (nr)) /* linux kernel compat */
 
 typedef uint8_t u8; /* linux kernel compat */
diff --git a/netlink.c b/netlink.c
new file mode 100644
index 0000000..cddc42a
--- /dev/null
+++ b/netlink.c
@@ -0,0 +1,810 @@ 
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <net/if.h>
+#include <netlink/netlink.h>
+#include <netlink/genl/genl.h>
+#include <netlink/genl/ctrl.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include "bat-hosts.h"
+#include "batman_adv.h"
+#include "functions.h"
+#include "main.h"
+
+struct print_opts {
+	int read_opt;
+	float orig_timeout;
+	float watch_interval;
+};
+
+static int last_err;
+
+static int print_error(struct sockaddr_nl *nla __unused,
+		       struct nlmsgerr *nlerr,
+		       void *arg __unused)
+{
+	if (nlerr->error != -EOPNOTSUPP)
+		fprintf(stderr, "Error received: %s\n",
+			strerror(-nlerr->error));
+
+	last_err = -nlerr->error;
+
+	return NL_STOP;
+}
+
+static int stop_callback(struct nl_msg *msg, void *arg __unused)
+{
+	struct nlmsghdr *nlh = nlmsg_hdr(msg);
+	int *error = nlmsg_data(nlh);
+
+	if (*error)
+		fprintf(stderr, "Error received: %s\n", strerror(-*error));
+
+	return NL_STOP;
+}
+
+static int info_callback(struct nl_msg *msg, void *arg __unused)
+{
+	struct nlattr *attrs[BATADV_ATTR_MAX+1];
+	struct nlmsghdr *nlh = nlmsg_hdr(msg);
+	struct genlmsghdr *ghdr;
+	const uint8_t *primary_mac ;
+	const char *primary_if;
+	const char *algo_name;
+	const char *mesh_name;
+	const char *version;
+
+	if (!genlmsg_valid_hdr(nlh, 0)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	ghdr = nlmsg_data(nlh);
+
+	if (ghdr->cmd != BATADV_CMD_GET_MESH_INFO)
+		return NL_OK;
+
+	if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
+		      genlmsg_len(ghdr), NULL)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	mesh_name = nla_get_string(attrs[BATADV_ATTR_MESH_IFNAME]);
+
+	if (attrs[BATADV_ATTR_HARD_IFNAME]) {
+		version = nla_get_string(attrs[BATADV_ATTR_VERSION]);
+		algo_name = nla_get_string(attrs[BATADV_ATTR_ALGO_NAME]);
+		primary_if = nla_get_string(attrs[BATADV_ATTR_HARD_IFNAME]);
+		primary_mac = nla_data(attrs[BATADV_ATTR_HARD_ADDRESS]);
+
+		printf("[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%02x:%02x:%02x:%02x:%02x:%02x (%s %s)]\n",
+		       version, primary_if,
+		       primary_mac[0], primary_mac[1], primary_mac[2],
+		       primary_mac[3], primary_mac[4], primary_mac[5],
+		       mesh_name, algo_name);
+	} else {
+		printf("BATMAN mesh %s disabled\n", mesh_name);
+	}
+
+	return NL_STOP;
+}
+
+static void netlink_print_info(int ifindex)
+{
+	struct nl_sock *sock;
+	struct nl_msg *msg;
+	struct nl_cb *cb;
+	int family;
+
+	sock = nl_socket_alloc();
+	genl_connect(sock);
+
+	family = genl_ctrl_resolve(sock, BATADV_NL_NAME);
+	if (family < 0) {
+		return;
+	}
+
+	msg = nlmsg_alloc();
+	genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0, 0,
+		    BATADV_CMD_GET_MESH_INFO, 1);
+
+	nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, ifindex);
+
+	nl_send_auto_complete(sock, msg);
+
+	nlmsg_free(msg);
+
+	cb = nl_cb_alloc(NL_CB_DEFAULT);
+	nl_cb_set (cb, NL_CB_VALID, NL_CB_CUSTOM, info_callback, NULL);
+	nl_cb_err(cb, NL_CB_CUSTOM, print_error, NULL);
+
+	nl_recvmsgs(sock, cb);
+
+	nl_socket_free(sock);
+}
+
+static int routing_algos_callback(struct nl_msg *msg, void *arg __unused)
+{
+	struct nlattr *attrs[BATADV_ATTR_MAX+1];
+	struct nlmsghdr *nlh = nlmsg_hdr(msg);
+	struct genlmsghdr *ghdr;
+
+	if (!genlmsg_valid_hdr(nlh, 0)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	ghdr = nlmsg_data(nlh);
+
+	if (ghdr->cmd != BATADV_CMD_GET_ROUTING_ALGOS)
+		return NL_OK;
+
+	if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
+		      genlmsg_len(ghdr), NULL)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	const char *algo_name = nla_get_string(attrs[BATADV_ATTR_ALGO_NAME]);
+
+	printf(" * %s\n", algo_name);
+
+	return NL_OK;
+}
+
+int netlink_print_routing_algos(void)
+{
+	struct nl_sock *sock;
+	struct nl_msg *msg;
+	struct nl_cb *cb;
+	int family;
+
+	sock = nl_socket_alloc();
+	genl_connect(sock);
+
+	family = genl_ctrl_resolve(sock, BATADV_NL_NAME);
+	if (family < 0) {
+		return EOPNOTSUPP;
+	}
+
+	msg = nlmsg_alloc();
+	genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0, NLM_F_DUMP,
+		    BATADV_CMD_GET_ROUTING_ALGOS, 1);
+
+	nl_send_auto_complete(sock, msg);
+
+	nlmsg_free(msg);
+
+	cb = nl_cb_alloc(NL_CB_DEFAULT);
+	nl_cb_set (cb, NL_CB_VALID, NL_CB_CUSTOM, routing_algos_callback,
+		   NULL);
+	nl_cb_set (cb, NL_CB_FINISH, NL_CB_CUSTOM, stop_callback, NULL);
+	nl_cb_err(cb, NL_CB_CUSTOM, print_error, NULL);
+
+	printf("Available routing algorithms:\n");
+
+	nl_recvmsgs(sock, cb);
+
+	nl_socket_free(sock);
+
+	return 0;
+}
+
+static int originators_callback(struct nl_msg *msg, void *arg)
+{
+	unsigned throughput_mbits, throughput_kbits;
+	struct nlattr *attrs[BATADV_ATTR_MAX+1];
+	struct nlmsghdr *nlh = nlmsg_hdr(msg);
+	int last_seen_msecs, last_seen_secs;
+	struct print_opts *opts = arg;
+	struct bat_host *bat_host;
+	struct genlmsghdr *ghdr;
+	char ifname[IF_NAMESIZE];
+	float last_seen;
+	uint8_t *neigh;
+	uint8_t *orig;
+	char c = ' ';
+	uint8_t tq;
+
+	if (!genlmsg_valid_hdr(nlh, 0)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	ghdr = nlmsg_data(nlh);
+
+	if (ghdr->cmd != BATADV_CMD_GET_ORIGINATORS)
+		return NL_OK;
+
+	if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
+		      genlmsg_len(ghdr), NULL)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	orig = nla_data(attrs[BATADV_ATTR_ORIG_ADDRESS]);
+	neigh = nla_data(attrs[BATADV_ATTR_NEIGH_ADDRESS]);
+
+	if (!if_indextoname(nla_get_u32(attrs[BATADV_ATTR_HARD_IFINDEX]),
+			    ifname))
+		ifname[0] = '\0';
+
+	if (attrs[BATADV_ATTR_FLAG_BEST])
+		c = '*';
+
+	last_seen_msecs = nla_get_u32(attrs[BATADV_ATTR_LAST_SEEN_MSECS]);
+	last_seen = (float)last_seen_msecs / 1000.0;
+	last_seen_secs = last_seen_msecs / 1000;
+	last_seen_msecs = last_seen_msecs % 1000;
+
+	/* skip timed out originators */
+	if (opts->read_opt & NO_OLD_ORIGS)
+		if (last_seen > opts->orig_timeout)
+			return NL_OK;
+
+	if (attrs[BATADV_ATTR_THROUGHPUT]) {
+		throughput_kbits = nla_get_u32(attrs[BATADV_ATTR_THROUGHPUT]);
+		throughput_mbits = throughput_kbits / 1000;
+		throughput_kbits = throughput_kbits % 1000;
+
+		if (!(opts->read_opt & USE_BAT_HOSTS)) {
+			printf(" %c %02x:%02x:%02x:%02x:%02x:%02x %4i.%03is (%9u.%1u) %02x:%02x:%02x:%02x:%02x:%02x [%10s]\n",
+			       c,
+			       orig[0], orig[1], orig[2],
+			       orig[3], orig[4], orig[5],
+			       last_seen_secs, last_seen_msecs,
+			       throughput_mbits, throughput_kbits / 100,
+			       neigh[0], neigh[1], neigh[2],
+			       neigh[3], neigh[4], neigh[5],
+			       ifname);
+		} else {
+			bat_host = bat_hosts_find_by_mac((char *)orig);
+			if (bat_host)
+				printf(" %c %17s ", c, bat_host->name);
+			else
+				printf(" %c %02x:%02x:%02x:%02x:%02x:%02x ",
+				       c,
+				       orig[0], orig[1], orig[2],
+				       orig[3], orig[4], orig[5]);
+			printf("%4i.%03is (%9u.%1u) ",
+			       last_seen_secs, last_seen_msecs,
+			       throughput_mbits, throughput_kbits / 100);
+			bat_host = bat_hosts_find_by_mac((char *)neigh);
+			if (bat_host)
+				printf(" %c %17s ", c, bat_host->name);
+			else
+				printf(" %02x:%02x:%02x:%02x:%02x:%02x ",
+				       neigh[0], neigh[1], neigh[2],
+				       neigh[3], neigh[4], neigh[5]);
+			printf("[%10s]\n", ifname);
+		}
+	}
+	else {
+		tq = nla_get_u8(attrs[BATADV_ATTR_TQ]);
+
+		if (!(opts->read_opt & USE_BAT_HOSTS)) {
+			printf(" %c %02x:%02x:%02x:%02x:%02x:%02x %4i.%03is   (%3i) %02x:%02x:%02x:%02x:%02x:%02x [%10s]\n",
+			       c,
+			       orig[0], orig[1], orig[2],
+			       orig[3], orig[4], orig[5],
+			       last_seen_secs, last_seen_msecs, tq,
+			       neigh[0], neigh[1], neigh[2],
+			       neigh[3], neigh[4], neigh[5],
+			       ifname);
+		} else {
+			bat_host = bat_hosts_find_by_mac((char *)orig);
+			if (bat_host)
+				printf(" %c %17s ", c, bat_host->name);
+			else
+				printf(" %c %02x:%02x:%02x:%02x:%02x:%02x ",
+				       c,
+				       orig[0], orig[1], orig[2],
+				       orig[3], orig[4], orig[5]);
+			printf("%4i.%03is   (%3i) ",
+			       last_seen_secs, last_seen_msecs, tq);
+			bat_host = bat_hosts_find_by_mac((char *)neigh);
+			if (bat_host)
+				printf("%17s ", bat_host->name);
+			else
+				printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+				       neigh[0], neigh[1], neigh[2],
+				       neigh[3], neigh[4], neigh[5]);
+			printf("[%10s]\n", ifname);
+		}
+	}
+
+	return NL_OK;
+}
+
+static int neighbors_callback(struct nl_msg *msg, void *arg)
+{
+	struct nlattr *attrs[BATADV_ATTR_MAX+1];
+	struct nlmsghdr *nlh = nlmsg_hdr(msg);
+	struct print_opts *opts = arg;
+	struct bat_host *bat_host;
+	char ifname[IF_NAMESIZE];
+	struct genlmsghdr *ghdr;
+	uint8_t *neigh;
+
+	if (!genlmsg_valid_hdr(nlh, 0)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	ghdr = nlmsg_data(nlh);
+
+	if (ghdr->cmd != BATADV_CMD_GET_NEIGHBORS)
+		return NL_OK;
+
+	if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
+		      genlmsg_len(ghdr), NULL)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	neigh = nla_data(attrs[BATADV_ATTR_NEIGH_ADDRESS]);
+	bat_host = bat_hosts_find_by_mac((char *)neigh);
+
+	if (!if_indextoname(nla_get_u32(attrs[BATADV_ATTR_HARD_IFINDEX]),
+			    ifname))
+		ifname[0] = '\0';
+
+	int last_seen_msecs, last_seen_secs;
+	last_seen_msecs = nla_get_u32(attrs[BATADV_ATTR_LAST_SEEN_MSECS]);
+	last_seen_secs = last_seen_msecs / 1000;
+	last_seen_msecs = last_seen_msecs % 1000;
+
+	if (attrs[BATADV_ATTR_THROUGHPUT]) {
+		unsigned throughput_mbits, throughput_kbits;
+		throughput_kbits = nla_get_u32(attrs[BATADV_ATTR_THROUGHPUT]);
+		throughput_mbits = throughput_kbits / 1000;
+		throughput_kbits = throughput_kbits % 1000;
+
+		if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
+			printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+			       neigh[0], neigh[1], neigh[2],
+			       neigh[3], neigh[4], neigh[5]);
+		else
+			printf("%17s ", bat_host->name);
+
+		printf("%4i.%03is (%9u.%1u) [%10s]\n",
+		       last_seen_secs, last_seen_msecs,
+		       throughput_mbits, throughput_kbits / 100,
+		       ifname);
+	} else {
+		printf("   %10s   ", ifname);
+
+		if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
+			printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+			       neigh[0], neigh[1], neigh[2],
+			       neigh[3], neigh[4], neigh[5]);
+		else
+			printf("%17s ", bat_host->name);
+
+		printf("%4i.%03is\n", last_seen_secs, last_seen_msecs);
+	}
+
+	return NL_OK;
+}
+
+static int transglobal_callback(struct nl_msg *msg, void *arg)
+{
+	struct nlattr *attrs[BATADV_ATTR_MAX+1];
+	struct nlmsghdr *nlh = nlmsg_hdr(msg);
+	struct print_opts *opts = arg;
+	struct bat_host *bat_host;
+	struct genlmsghdr *ghdr;
+	uint8_t last_ttvn;
+	uint32_t crc32;
+	uint32_t flags;
+	uint8_t *addr;
+	uint8_t *orig;
+	uint8_t ttvn;
+	int16_t vid;
+
+	if (!genlmsg_valid_hdr(nlh, 0)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	ghdr = nlmsg_data(nlh);
+
+	if (ghdr->cmd != BATADV_CMD_GET_TRANSTABLE_GLOBAL)
+		return NL_OK;
+
+	if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
+		      genlmsg_len(ghdr), NULL)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	addr = nla_data(attrs[BATADV_ATTR_TT_ADDRESS]);
+	orig = nla_data(attrs[BATADV_ATTR_ORIG_ADDRESS]);
+	vid = nla_get_u16(attrs[BATADV_ATTR_TT_VID]);
+	ttvn = nla_get_u8(attrs[BATADV_ATTR_TT_TTVN]);
+	last_ttvn = nla_get_u8(attrs[BATADV_ATTR_TT_LAST_TTVN]);
+	crc32 = nla_get_u32(attrs[BATADV_ATTR_TT_CRC32]);
+	flags = nla_get_u32(attrs[BATADV_ATTR_TT_FLAGS]);
+
+	char c = ' ', r = '.', w = '.', i = '.', t = '.';
+	if (attrs[BATADV_ATTR_FLAG_BEST])
+		c = '*';
+	if (flags & BATADV_TT_CLIENT_ROAM)
+		r = 'R';
+	if (flags & BATADV_TT_CLIENT_WIFI)
+		w = 'W';
+	if (flags & BATADV_TT_CLIENT_ISOLA)
+		i = 'I';
+	if (flags & BATADV_TT_CLIENT_TEMP)
+		t = 'T';
+
+
+	printf(" %c ", c);
+
+	bat_host = bat_hosts_find_by_mac((char *)addr);
+	if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
+		printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+		       addr[0], addr[1], addr[2],
+		       addr[3], addr[4], addr[5]);
+	else
+		printf("%17s ", bat_host->name);
+
+	printf("%4i [%c%c%c%c] (%3u) ",
+	       vid, r, w, i, t, ttvn);
+
+	bat_host = bat_hosts_find_by_mac((char *)orig);
+	if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
+		printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+		       orig[0], orig[1], orig[2],
+		       orig[3], orig[4], orig[5]);
+	else
+		printf("%17s ", bat_host->name);
+
+	printf("(%3u) (0x%.8x)\n",
+	       last_ttvn, crc32);
+
+	return NL_OK;
+}
+
+static int translocal_callback(struct nl_msg *msg, void *arg)
+{
+	struct nlattr *attrs[BATADV_ATTR_MAX+1];
+	struct nlmsghdr *nlh = nlmsg_hdr(msg);
+	struct print_opts *opts = arg;
+	struct bat_host *bat_host;
+	struct genlmsghdr *ghdr;
+	uint8_t *addr;
+	int16_t vid;
+	uint32_t crc32;
+	uint32_t flags;
+	int last_seen_msecs = 0, last_seen_secs = 0;
+
+	if (!genlmsg_valid_hdr(nlh, 0)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	ghdr = nlmsg_data(nlh);
+
+	if (ghdr->cmd != BATADV_CMD_GET_TRANSTABLE_LOCAL)
+		return NL_OK;
+
+	if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
+		      genlmsg_len(ghdr), NULL)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	addr = nla_data(attrs[BATADV_ATTR_TT_ADDRESS]);
+	vid = nla_get_u16(attrs[BATADV_ATTR_TT_VID]);
+	crc32 = nla_get_u32(attrs[BATADV_ATTR_TT_CRC32]);
+	flags = nla_get_u32(attrs[BATADV_ATTR_TT_FLAGS]);
+	last_seen_msecs = 0, last_seen_secs = 0;
+
+	char r = '.', p = '.', n = '.', x = '.', w = '.', i = '.';
+	if (flags & BATADV_TT_CLIENT_ROAM)
+		r = 'R';
+	if (flags & BATADV_TT_CLIENT_NEW)
+		n = 'N';
+	if (flags & BATADV_TT_CLIENT_PENDING)
+		x = 'X';
+	if (flags & BATADV_TT_CLIENT_WIFI)
+		w = 'W';
+	if (flags & BATADV_TT_CLIENT_ISOLA)
+		i = 'I';
+
+	if (flags & BATADV_TT_CLIENT_NOPURGE)  {
+		p = 'P';
+	} else {
+		last_seen_msecs = nla_get_u32(
+			attrs[BATADV_ATTR_LAST_SEEN_MSECS]);
+		last_seen_secs = last_seen_msecs / 1000;
+		last_seen_msecs = last_seen_msecs % 1000;
+	}
+
+	bat_host = bat_hosts_find_by_mac((char *)addr);
+	if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
+		printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+		       addr[0], addr[1], addr[2],
+		       addr[3], addr[4], addr[5]);
+	else
+		printf("%17s ", bat_host->name);
+
+	printf("%4i [%c%c%c%c%c%c] %3u.%03u   (0x%.8x)\n",
+	       vid, r, p, n, x, w, i,
+	       last_seen_secs, last_seen_msecs,
+	       crc32);
+
+	return NL_OK;
+}
+
+static int gateways_callback(struct nl_msg *msg, void *arg)
+{
+	struct nlattr *attrs[BATADV_ATTR_MAX+1];
+	struct nlmsghdr *nlh = nlmsg_hdr(msg);
+	struct print_opts *opts = arg;
+	struct bat_host *bat_host;
+	struct genlmsghdr *ghdr;
+	const char *primary_if;
+	uint32_t bandwidth_down;
+	uint32_t bandwidth_up;
+	uint8_t *router;
+	uint8_t *orig;
+	char c = ' ';
+	uint8_t tq;
+
+	if (!genlmsg_valid_hdr(nlh, 0)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	ghdr = nlmsg_data(nlh);
+
+	if (ghdr->cmd != BATADV_CMD_GET_GATEWAYS)
+		return NL_OK;
+
+	if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
+		      genlmsg_len(ghdr), NULL)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	if (attrs[BATADV_ATTR_FLAG_BEST])
+		c = '*';
+
+	orig = nla_data(attrs[BATADV_ATTR_ORIG_ADDRESS]);
+	tq = nla_get_u8(attrs[BATADV_ATTR_TQ]);
+	router = nla_data(attrs[BATADV_ATTR_ROUTER]);
+	primary_if = nla_get_string(attrs[BATADV_ATTR_HARD_IFNAME]);
+	bandwidth_down = nla_get_u32(attrs[BATADV_ATTR_BANDWIDTH_DOWN]);
+	bandwidth_up = nla_get_u32(attrs[BATADV_ATTR_BANDWIDTH_UP]);
+
+	printf("%c ", c);
+
+	bat_host = bat_hosts_find_by_mac((char *)orig);
+	if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
+		printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+		       orig[0], orig[1], orig[2],
+		       orig[3], orig[4], orig[5]);
+	else
+		printf("%17s ", bat_host->name);
+
+	printf("(%3i) ", tq);
+
+	bat_host = bat_hosts_find_by_mac((char *)router);
+	if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
+ 		printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+		       router[0], router[1], router[2],
+		       router[3], router[4], router[5]);
+	else
+		printf("%17s ", bat_host->name);
+
+	printf("[%10s]: %u.%u/%u.%u MBit\n",
+	       primary_if, bandwidth_down / 10, bandwidth_down % 10,
+	       bandwidth_up / 10, bandwidth_up % 10);
+
+	return NL_OK;
+}
+
+static int bla_claim_callback(struct nl_msg *msg, void *arg)
+{
+	struct nlattr *attrs[BATADV_ATTR_MAX+1];
+	struct nlmsghdr *nlh = nlmsg_hdr(msg);
+	struct print_opts *opts = arg;
+	struct bat_host *bat_host;
+	struct genlmsghdr *ghdr;
+	uint16_t backbone_crc;
+	uint8_t *backbone;
+	uint8_t *client;
+	uint16_t vid;
+	char c = ' ';
+
+	if (!genlmsg_valid_hdr(nlh, 0)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	ghdr = nlmsg_data(nlh);
+
+	if (ghdr->cmd != BATADV_CMD_GET_BLA_CLAIM)
+		return NL_OK;
+
+	if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
+		      genlmsg_len(ghdr), NULL)) {
+		fputs("Received invalid data from kernel.", stderr);
+		exit(1);
+	}
+
+	if (attrs[BATADV_ATTR_BLA_OWN])
+		c = '*';
+
+	client = nla_data(attrs[BATADV_ATTR_BLA_ADDRESS]);
+	vid = nla_get_u16(attrs[BATADV_ATTR_BLA_VID]);
+	backbone = nla_data(attrs[BATADV_ATTR_BLA_BACKBONE]);
+	backbone_crc = nla_get_u16(attrs[BATADV_ATTR_BLA_CRC]);
+
+	bat_host = bat_hosts_find_by_mac((char *)client);
+	if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
+		printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+		       client[0], client[1], client[2],
+		       client[3], client[4], client[5]);
+	else
+		printf("%17s ", bat_host->name);
+
+	printf("%5d ", vid);
+
+	bat_host = bat_hosts_find_by_mac((char *)backbone);
+	if (!(opts->read_opt & USE_BAT_HOSTS) || !bat_host)
+ 		printf("%02x:%02x:%02x:%02x:%02x:%02x ",
+		       backbone[0], backbone[1], backbone[2],
+		       backbone[3], backbone[4], backbone[5]);
+	else
+		printf("%17s ", bat_host->name);
+
+	printf("%c %#.4x", c, backbone_crc);
+
+	return NL_OK;
+}
+
+static int netlink_print_common(char *mesh_iface, int read_opt,
+				float orig_timeout, float watch_interval,
+				const char *header, uint8_t nl_cmd,
+				nl_recvmsg_msg_cb_t callback)
+{
+	struct print_opts opts = {
+		.read_opt = read_opt,
+		.orig_timeout = orig_timeout,
+		.watch_interval = watch_interval
+	};
+	struct nl_sock *sock;
+	struct nl_msg *msg;
+	struct nl_cb *cb;
+	int ifindex;
+	int family;
+
+	sock = nl_socket_alloc();
+	genl_connect(sock);
+
+	family = genl_ctrl_resolve(sock, BATADV_NL_NAME);
+	if (family < 0) {
+		return EOPNOTSUPP;
+	}
+
+	ifindex = if_nametoindex(mesh_iface);
+	if (!ifindex) {
+		fprintf(stderr, "Interface %s is unknown\n", mesh_iface);
+		return ENODEV;
+	}
+
+	bat_hosts_init(read_opt);
+
+	cb = nl_cb_alloc(NL_CB_DEFAULT);
+	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, callback, &opts);
+	nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, stop_callback, NULL);
+	nl_cb_err(cb, NL_CB_CUSTOM, print_error, NULL);
+
+	do {
+		if (read_opt & CLR_CONT_READ)
+			/* clear screen, set cursor back to 0,0 */
+			printf("\033[2J\033[0;0f");
+
+		if (!(read_opt & SKIP_HEADER)) {
+			netlink_print_info(ifindex);
+			if (header)
+				printf(header);
+		}
+
+		msg = nlmsg_alloc();
+		genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0,
+			    NLM_F_DUMP, nl_cmd, 1);
+
+		nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, ifindex);
+		nl_send_auto_complete(sock, msg);
+
+		nlmsg_free(msg);
+
+		last_err = 0;
+		nl_recvmsgs(sock, cb);
+		if (!last_err && read_opt & (CONT_READ|CLR_CONT_READ))
+			usleep(1000000 * watch_interval);
+
+	} while (!last_err && read_opt & (CONT_READ|CLR_CONT_READ));
+
+	bat_hosts_free();
+
+	nl_socket_free(sock);
+
+	return last_err;
+}
+
+
+int netlink_print_originators(char *mesh_iface, int read_opts,
+			      float orig_timeout,
+			      float watch_interval)
+{
+	return netlink_print_common(mesh_iface, read_opts, orig_timeout,
+				    watch_interval, "",
+				    BATADV_CMD_GET_ORIGINATORS,
+				    originators_callback);
+}
+
+int netlink_print_neighbors(char *mesh_iface, int read_opts,
+			    float orig_timeout,
+			    float watch_interval)
+{
+	return netlink_print_common(mesh_iface, read_opts, orig_timeout,
+				    watch_interval,
+				    "           IF        Neighbor      last-seen\n""",
+				    BATADV_CMD_GET_NEIGHBORS,
+				    neighbors_callback);
+}
+
+int netlink_print_transglobal(char *mesh_iface, int read_opts,
+			      float orig_timeout,
+			      float watch_interval)
+{
+	return netlink_print_common(mesh_iface, read_opts, orig_timeout,
+				    watch_interval,
+				    "       Client         VID Flags Last ttvn     Via        ttvn  (CRC       )\n",
+				    BATADV_CMD_GET_TRANSTABLE_GLOBAL,
+				    transglobal_callback);
+}
+
+int netlink_print_translocal(char *mesh_iface, int read_opts,
+			     float orig_timeout,
+			     float watch_interval)
+{
+	return netlink_print_common(mesh_iface, read_opts, orig_timeout,
+				    watch_interval,
+				    "    Client         VID Flags    Last seen (CRC       )\n",
+				    BATADV_CMD_GET_TRANSTABLE_LOCAL,
+				    translocal_callback);
+}
+
+int netlink_print_gateways(char *mesh_iface, int read_opts,
+			   float orig_timeout,
+			   float watch_interval)
+{
+	return netlink_print_common(mesh_iface, read_opts, orig_timeout,
+				    watch_interval,
+				    "    Router           TQ      Next Hop        outgoingIf   Bandwidth\n",
+				    BATADV_CMD_GET_GATEWAYS,
+				    gateways_callback);
+}
+
+int netlink_print_bla_claim(char *mesh_iface, int read_opts,
+			    float orig_timeout,
+			    float watch_interval)
+{
+	return netlink_print_common(mesh_iface, read_opts, orig_timeout,
+				    watch_interval,
+				    "Client               VID      Originator        [o] (CRC   )\n",
+				    BATADV_CMD_GET_BLA_CLAIM,
+				    bla_claim_callback);
+}
+
+