[v2,6/7] batctl: Move interface command to extra file

diff --git a/Makefile b/Makefile
index 0cec413..5dc8fe8 100755
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,7 @@  OBJ += debug.o
 OBJ += functions.o
 OBJ += genl.o
 OBJ += hash.o
+OBJ += interface.o
 OBJ += ioctl.o
 OBJ += list-batman.o
 OBJ += main.o
diff --git a/functions.h b/functions.h
index 7757731..4c350f8 100644
--- a/functions.h
+++ b/functions.h
@@ -31,6 +31,8 @@ 
 #define ETH_STR_LEN 17
 #define BATMAN_ADV_TAG "batman-adv:"
 
+#define PATH_BUFF_LEN 200
+
 /* return time delta from start to end in milliseconds */
 void start_timer(void);
 double end_timer(void);
diff --git a/interface.c b/interface.c
new file mode 100644
index 0000000..9d5590d
--- /dev/null
+++ b/interface.c
@@ -0,0 +1,457 @@ 
+/*
+ * Copyright (C) 2009-2016  B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner <mareklindner@neomailbox.ch>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "interface.h"
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <dirent.h>
+#include <net/if.h>
+#include <linux/if_link.h>
+#include <netlink/netlink.h>
+#include <netlink/msg.h>
+#include <netlink/attr.h>
+
+#include "main.h"
+#include "sys.h"
+#include "functions.h"
+
+static void interface_usage(void)
+{
+	fprintf(stderr, "Usage: batctl [options] interface [parameters] [add|del iface(s)]\n");
+	fprintf(stderr, "       batctl [options] interface [parameters] [create|destroy]\n");
+	fprintf(stderr, "parameters:\n");
+	fprintf(stderr, " \t -M disable automatic creation/removal of batman-adv interface\n");
+	fprintf(stderr, " \t -h print this help\n");
+}
+
+static struct nla_policy link_policy[IFLA_MAX + 1] = {
+	[IFLA_IFNAME] = { .type = NLA_STRING, .maxlen = IFNAMSIZ },
+	[IFLA_MASTER] = { .type = NLA_U32 },
+};
+
+struct print_interfaces_rtnl_arg {
+	int ifindex;
+};
+
+static int print_interfaces_rtnl_parse(struct nl_msg *msg, void *arg)
+{
+	struct print_interfaces_rtnl_arg *print_arg = arg;
+	struct nlattr *attrs[IFLA_MAX + 1];
+	char path_buff[PATH_BUFF_LEN];
+	struct ifinfomsg *ifm;
+	char *ifname;
+	int ret;
+	const char *status;
+	int master;
+
+	ifm = nlmsg_data(nlmsg_hdr(msg));
+	ret = nlmsg_parse(nlmsg_hdr(msg), sizeof(*ifm), attrs, IFLA_MAX,
+			  link_policy);
+	if (ret < 0)
+		goto err;
+
+	if (!attrs[IFLA_IFNAME])
+		goto err;
+
+	if (!attrs[IFLA_MASTER])
+		goto err;
+
+	ifname = nla_get_string(attrs[IFLA_IFNAME]);
+	master = nla_get_u32(attrs[IFLA_MASTER]);
+
+	/* required on older kernels which don't prefilter the results */
+	if (master != print_arg->ifindex)
+		goto err;
+
+	snprintf(path_buff, sizeof(path_buff), SYS_IFACE_STATUS_FMT, ifname);
+	ret = read_file("", path_buff, USE_READ_BUFF | SILENCE_ERRORS, 0, 0, 0);
+	if (ret != EXIT_SUCCESS)
+		status = "<error reading status>\n";
+	else
+		status = line_ptr;
+
+	printf("%s: %s", ifname, status);
+
+	free(line_ptr);
+	line_ptr = NULL;
+
+err:
+	return NL_OK;
+}
+
+static int print_interfaces(char *mesh_iface)
+{
+	struct print_interfaces_rtnl_arg print_arg;
+
+	if (!file_exists(module_ver_path)) {
+		fprintf(stderr, "Error - batman-adv module has not been loaded\n");
+		return EXIT_FAILURE;
+	}
+
+	print_arg.ifindex = if_nametoindex(mesh_iface);
+	if (!print_arg.ifindex)
+		return EXIT_FAILURE;
+
+	query_rtnl_link(print_arg.ifindex, print_interfaces_rtnl_parse,
+			&print_arg);
+
+	return EXIT_SUCCESS;
+}
+
+struct count_interfaces_rtnl_arg {
+	int ifindex;
+	unsigned int count;
+};
+
+static int count_interfaces_rtnl_parse(struct nl_msg *msg, void *arg)
+{
+	struct count_interfaces_rtnl_arg *count_arg = arg;
+	struct nlattr *attrs[IFLA_MAX + 1];
+	struct ifinfomsg *ifm;
+	int ret;
+	int master;
+
+	ifm = nlmsg_data(nlmsg_hdr(msg));
+	ret = nlmsg_parse(nlmsg_hdr(msg), sizeof(*ifm), attrs, IFLA_MAX,
+			  link_policy);
+	if (ret < 0)
+		goto err;
+
+	if (!attrs[IFLA_IFNAME])
+		goto err;
+
+	if (!attrs[IFLA_MASTER])
+		goto err;
+
+	master = nla_get_u32(attrs[IFLA_MASTER]);
+
+	/* required on older kernels which don't prefilter the results */
+	if (master != count_arg->ifindex)
+		goto err;
+
+	count_arg->count++;
+
+err:
+	return NL_OK;
+}
+
+static unsigned int count_interfaces(char *mesh_iface)
+{
+	struct count_interfaces_rtnl_arg count_arg;
+
+	count_arg.count = 0;
+	count_arg.ifindex = if_nametoindex(mesh_iface);
+	if (!count_arg.ifindex)
+		return 0;
+
+	query_rtnl_link(count_arg.ifindex, count_interfaces_rtnl_parse,
+			&count_arg);
+
+	return count_arg.count;
+}
+
+static int create_interface(const char *mesh_iface)
+{
+	struct ifinfomsg rt_hdr = {
+		.ifi_family = IFLA_UNSPEC,
+	};
+	struct nlattr *linkinfo;
+	struct nl_msg *msg;
+	int err = 0;
+	int ret;
+
+	msg = nlmsg_alloc_simple(RTM_NEWLINK,
+				 NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK);
+	if (!msg) {
+		return -ENOMEM;
+	}
+
+	ret = nlmsg_append(msg, &rt_hdr, sizeof(rt_hdr), NLMSG_ALIGNTO);
+	if (ret < 0) {
+		err = -ENOMEM;
+		goto err_free_msg;
+	}
+
+	ret = nla_put_string(msg, IFLA_IFNAME, mesh_iface);
+	if (ret < 0) {
+		err = -ENOMEM;
+		goto err_free_msg;
+	}
+
+	linkinfo = nla_nest_start(msg, IFLA_LINKINFO);
+	if (!linkinfo) {
+		err = -ENOMEM;
+		goto err_free_msg;
+	}
+
+	ret = nla_put_string(msg, IFLA_INFO_KIND, "batadv");
+	if (ret < 0) {
+		err = -ENOMEM;
+		goto err_free_msg;
+	}
+
+	nla_nest_end(msg, linkinfo);
+
+	err = netlink_simple_request(msg);
+
+err_free_msg:
+	nlmsg_free(msg);
+
+	return err;
+}
+
+static int destroy_interface(const char *mesh_iface)
+{
+	struct ifinfomsg rt_hdr = {
+		.ifi_family = IFLA_UNSPEC,
+	};
+	struct nl_msg *msg;
+	int err = 0;
+	int ret;
+
+	msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST | NLM_F_ACK);
+	if (!msg) {
+		return -ENOMEM;
+	}
+
+	ret = nlmsg_append(msg, &rt_hdr, sizeof(rt_hdr), NLMSG_ALIGNTO);
+	if (ret < 0) {
+		err = -ENOMEM;
+		goto err_free_msg;
+	}
+
+	ret = nla_put_string(msg, IFLA_IFNAME, mesh_iface);
+	if (ret < 0) {
+		err = -ENOMEM;
+		goto err_free_msg;
+	}
+
+	err = netlink_simple_request(msg);
+
+err_free_msg:
+	nlmsg_free(msg);
+
+	return err;
+}
+
+static int set_master_interface(const char *iface, unsigned int ifmaster)
+{
+	struct ifinfomsg rt_hdr = {
+		.ifi_family = IFLA_UNSPEC,
+	};
+	struct nl_msg *msg;
+	int err = 0;
+	int ret;
+
+	msg = nlmsg_alloc_simple(RTM_SETLINK, NLM_F_REQUEST | NLM_F_ACK);
+	if (!msg) {
+		return -ENOMEM;
+	}
+
+	ret = nlmsg_append(msg, &rt_hdr, sizeof(rt_hdr), NLMSG_ALIGNTO);
+	if (ret < 0) {
+		err = -ENOMEM;
+		goto err_free_msg;
+	}
+
+	ret = nla_put_string(msg, IFLA_IFNAME, iface);
+	if (ret < 0) {
+		err = -ENOMEM;
+		goto err_free_msg;
+	}
+
+	ret = nla_put_u32(msg, IFLA_MASTER, ifmaster);
+	if (ret < 0) {
+		err = -ENOMEM;
+		goto err_free_msg;
+	}
+
+	err = netlink_simple_request(msg);
+
+err_free_msg:
+	nlmsg_free(msg);
+
+	return err;
+}
+
+int interface(char *mesh_iface, int argc, char **argv)
+{
+	int i, optchar;
+	int ret;
+	unsigned int ifindex;
+	unsigned int ifmaster;
+	const char *long_op;
+	unsigned int cnt;
+	int rest_argc;
+	char **rest_argv;
+	bool manual_mode = false;
+
+	while ((optchar = getopt(argc, argv, "hM")) != -1) {
+		switch (optchar) {
+		case 'h':
+			interface_usage();
+			return EXIT_SUCCESS;
+		case 'M':
+			manual_mode = true;
+			break;
+		default:
+			interface_usage();
+			return EXIT_FAILURE;
+		}
+	}
+
+	rest_argc = argc - optind;
+	rest_argv = &argv[optind];
+
+	if (rest_argc == 0)
+		return print_interfaces(mesh_iface);
+
+	if ((strcmp(rest_argv[0], "add") != 0) && (strcmp(rest_argv[0], "a") != 0) &&
+	    (strcmp(rest_argv[0], "del") != 0) && (strcmp(rest_argv[0], "d") != 0) &&
+	    (strcmp(rest_argv[0], "create") != 0) && (strcmp(rest_argv[0], "c") != 0) &&
+	    (strcmp(rest_argv[0], "destroy") != 0) && (strcmp(rest_argv[0], "D") != 0)) {
+		fprintf(stderr, "Error - unknown argument specified: %s\n", rest_argv[0]);
+		interface_usage();
+		goto err;
+	}
+
+	if (strcmp(rest_argv[0], "destroy") == 0)
+		rest_argv[0][0] = 'D';
+
+	switch (rest_argv[0][0]) {
+	case 'a':
+	case 'd':
+		if (rest_argc == 1) {
+			fprintf(stderr,
+				"Error - missing interface name(s) after '%s'\n",
+				rest_argv[0]);
+			interface_usage();
+			goto err;
+		}
+		break;
+	case 'c':
+	case 'D':
+		if (rest_argc != 1) {
+			fprintf(stderr,
+				"Error - extra parameter after '%s'\n",
+				rest_argv[0]);
+			interface_usage();
+			goto err;
+		}
+		break;
+	default:
+		break;
+	}
+
+	switch (rest_argv[0][0]) {
+	case 'c':
+		ret = create_interface(mesh_iface);
+		if (ret < 0) {
+			fprintf(stderr,
+				"Error - failed to add create batman-adv interface: %s\n",
+				strerror(-ret));
+			goto err;
+		}
+		return EXIT_SUCCESS;
+	case 'D':
+		ret = destroy_interface(mesh_iface);
+		if (ret < 0) {
+			fprintf(stderr,
+				"Error - failed to destroy batman-adv interface: %s\n",
+				strerror(-ret));
+			goto err;
+		}
+		return EXIT_SUCCESS;
+	default:
+		break;
+	}
+
+	/* get index of batman-adv interface - or try to create it */
+	ifmaster = if_nametoindex(mesh_iface);
+	if (!manual_mode && !ifmaster && rest_argv[0][0] == 'a') {
+		ret = create_interface(mesh_iface);
+		if (ret < 0) {
+			fprintf(stderr,
+				"Error - failed to create batman-adv interface: %s\n",
+				strerror(-ret));
+			goto err;
+		}
+
+		ifmaster = if_nametoindex(mesh_iface);
+	}
+
+	if (!ifmaster) {
+		ret = -ENODEV;
+		fprintf(stderr,
+			"Error - failed to find batman-adv interface: %s\n",
+			strerror(-ret));
+		goto err;
+	}
+
+	/* make sure that batman-adv is loaded or was loaded by create_interface */
+	if (!file_exists(module_ver_path)) {
+		fprintf(stderr, "Error - batman-adv module has not been loaded\n");
+		goto err;
+	}
+
+	for (i = 1; i < rest_argc; i++) {
+		ifindex = if_nametoindex(rest_argv[i]);
+
+		if (!ifindex) {
+			fprintf(stderr, "Error - interface does not exist: %s\n", rest_argv[i]);
+			continue;
+		}
+
+		if (rest_argv[0][0] == 'a')
+			ifindex = ifmaster;
+		else
+			ifindex = 0;
+
+		ret = set_master_interface(rest_argv[i], ifindex);
+		if (ret < 0) {
+			if (rest_argv[0][0] == 'a')
+				long_op = "add";
+			else
+				long_op = "delete";
+
+			fprintf(stderr, "Error - failed to %s interface %s: %s\n",
+				long_op, rest_argv[i], strerror(-ret));
+			goto err;
+		}
+	}
+
+	/* check if there is no interface left and then destroy mesh_iface */
+	if (!manual_mode && rest_argv[0][0] == 'd') {
+		cnt = count_interfaces(mesh_iface);
+		if (cnt == 0)
+			destroy_interface(mesh_iface);
+	}
+
+	return EXIT_SUCCESS;
+
+err:
+	return EXIT_FAILURE;
+}
diff --git a/interface.h b/interface.h
new file mode 100644
index 0000000..0ea7bd5
--- /dev/null
+++ b/interface.h
@@ -0,0 +1,29 @@ 
+/*
+ * Copyright (C) 2009-2016  B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner <mareklindner@neomailbox.ch>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _BATCTL_INTERFACE_H
+#define _BATCTL_INTERFACE_H
+
+#include "main.h"
+
+int interface(char *mesh_iface, int argc, char **argv);
+
+#endif
diff --git a/main.c b/main.c
index 5e1ecc7..e67fc40 100644
--- a/main.c
+++ b/main.c
@@ -29,6 +29,7 @@ 
 #include "main.h"
 #include "sys.h"
 #include "debug.h"
+#include "interface.h"
 #include "ping.h"
 #include "translate.h"
 #include "traceroute.h"
diff --git a/sys.c b/sys.c
index 2cbccea..59cbdae 100644
--- a/sys.c
+++ b/sys.c
@@ -38,8 +38,6 @@ 
 #include "functions.h"
 #include "debug.h"
 
-#define PATH_BUFF_LEN 200
-
 const char *sysfs_param_enable[] = {
 	"enable",
 	"disable",
@@ -118,424 +116,6 @@  const struct settings_data batctl_settings[BATCTL_SETTINGS_NUM] = {
 	},
 };
 
-static void interface_usage(void)
-{
-	fprintf(stderr, "Usage: batctl [options] interface [parameters] [add|del iface(s)]\n");
-	fprintf(stderr, "       batctl [options] interface [parameters] [create|destroy]\n");
-	fprintf(stderr, "parameters:\n");
-	fprintf(stderr, " \t -M disable automatic creation/removal of batman-adv interface\n");
-	fprintf(stderr, " \t -h print this help\n");
-}
-
-static struct nla_policy link_policy[IFLA_MAX + 1] = {
-	[IFLA_IFNAME]           = { .type = NLA_STRING, .maxlen = IFNAMSIZ },
-	[IFLA_MASTER]         = { .type = NLA_U32 },
-};
-
-struct print_interfaces_rtnl_arg {
-	int ifindex;
-};
-
-static int print_interfaces_rtnl_parse(struct nl_msg *msg, void *arg)
-{
-	struct print_interfaces_rtnl_arg *print_arg = arg;
-	struct nlattr *attrs[IFLA_MAX + 1];
-	char path_buff[PATH_BUFF_LEN];
-	struct ifinfomsg *ifm;
-	char *ifname;
-	int ret;
-	const char *status;
-	int master;
-
-	ifm = nlmsg_data(nlmsg_hdr(msg));
-	ret = nlmsg_parse(nlmsg_hdr(msg), sizeof(*ifm), attrs, IFLA_MAX,
-			  link_policy);
-	if (ret < 0)
-		goto err;
-
-	if (!attrs[IFLA_IFNAME])
-		goto err;
-
-	if (!attrs[IFLA_MASTER])
-		goto err;
-
-	ifname = nla_get_string(attrs[IFLA_IFNAME]);
-	master = nla_get_u32(attrs[IFLA_MASTER]);
-
-	/* required on older kernels which don't prefilter the results */
-	if (master != print_arg->ifindex)
-		goto err;
-
-	snprintf(path_buff, sizeof(path_buff), SYS_IFACE_STATUS_FMT, ifname);
-	ret = read_file("", path_buff, USE_READ_BUFF | SILENCE_ERRORS, 0, 0, 0);
-	if (ret != EXIT_SUCCESS)
-		status = "<error reading status>\n";
-	else
-		status = line_ptr;
-
-	printf("%s: %s", ifname, status);
-
-	free(line_ptr);
-	line_ptr = NULL;
-
-err:
-	return NL_OK;
-}
-
-static int print_interfaces(char *mesh_iface)
-{
-	struct print_interfaces_rtnl_arg print_arg;
-
-	if (!file_exists(module_ver_path)) {
-		fprintf(stderr, "Error - batman-adv module has not been loaded\n");
-		return EXIT_FAILURE;
-	}
-
-	print_arg.ifindex = if_nametoindex(mesh_iface);
-	if (!print_arg.ifindex)
-		return EXIT_FAILURE;
-
-	query_rtnl_link(print_arg.ifindex, print_interfaces_rtnl_parse,
-			&print_arg);
-
-	return EXIT_SUCCESS;
-}
-
-struct count_interfaces_rtnl_arg {
-	int ifindex;
-	unsigned int count;
-};
-
-static int count_interfaces_rtnl_parse(struct nl_msg *msg, void *arg)
-{
-	struct count_interfaces_rtnl_arg *count_arg = arg;
-	struct nlattr *attrs[IFLA_MAX + 1];
-	struct ifinfomsg *ifm;
-	int ret;
-	int master;
-
-	ifm = nlmsg_data(nlmsg_hdr(msg));
-	ret = nlmsg_parse(nlmsg_hdr(msg), sizeof(*ifm), attrs, IFLA_MAX,
-			  link_policy);
-	if (ret < 0)
-		goto err;
-
-	if (!attrs[IFLA_IFNAME])
-		goto err;
-
-	if (!attrs[IFLA_MASTER])
-		goto err;
-
-	master = nla_get_u32(attrs[IFLA_MASTER]);
-
-	/* required on older kernels which don't prefilter the results */
-	if (master != count_arg->ifindex)
-		goto err;
-
-	count_arg->count++;
-
-err:
-	return NL_OK;
-}
-
-static unsigned int count_interfaces(char *mesh_iface)
-{
-	struct count_interfaces_rtnl_arg count_arg;
-
-	count_arg.count = 0;
-	count_arg.ifindex = if_nametoindex(mesh_iface);
-	if (!count_arg.ifindex)
-		return 0;
-
-	query_rtnl_link(count_arg.ifindex, count_interfaces_rtnl_parse,
-			&count_arg);
-
-	return count_arg.count;
-}
-
-static int create_interface(const char *mesh_iface)
-{
-	struct ifinfomsg rt_hdr = {
-		.ifi_family = IFLA_UNSPEC,
-	};
-	struct nlattr *linkinfo;
-	struct nl_msg *msg;
-	int err = 0;
-	int ret;
-
-	msg = nlmsg_alloc_simple(RTM_NEWLINK,
-				 NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK);
-	if (!msg) {
-		return -ENOMEM;
-	}
-
-	ret = nlmsg_append(msg, &rt_hdr, sizeof(rt_hdr), NLMSG_ALIGNTO);
-	if (ret < 0) {
-		err = -ENOMEM;
-		goto err_free_msg;
-	}
-
-	ret = nla_put_string(msg, IFLA_IFNAME, mesh_iface);
-	if (ret < 0) {
-		err = -ENOMEM;
-		goto err_free_msg;
-	}
-
-	linkinfo = nla_nest_start(msg, IFLA_LINKINFO);
-	if (!linkinfo) {
-		err = -ENOMEM;
-		goto err_free_msg;
-	}
-
-	ret = nla_put_string(msg, IFLA_INFO_KIND, "batadv");
-	if (ret < 0) {
-		err = -ENOMEM;
-		goto err_free_msg;
-	}
-
-	nla_nest_end(msg, linkinfo);
-
-	err = netlink_simple_request(msg);
-
-err_free_msg:
-	nlmsg_free(msg);
-
-	return err;
-}
-
-static int destroy_interface(const char *mesh_iface)
-{
-	struct ifinfomsg rt_hdr = {
-		.ifi_family = IFLA_UNSPEC,
-	};
-	struct nl_msg *msg;
-	int err = 0;
-	int ret;
-
-	msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST | NLM_F_ACK);
-	if (!msg) {
-		return -ENOMEM;
-	}
-
-	ret = nlmsg_append(msg, &rt_hdr, sizeof(rt_hdr), NLMSG_ALIGNTO);
-	if (ret < 0) {
-		err = -ENOMEM;
-		goto err_free_msg;
-	}
-
-	ret = nla_put_string(msg, IFLA_IFNAME, mesh_iface);
-	if (ret < 0) {
-		err = -ENOMEM;
-		goto err_free_msg;
-	}
-
-	err = netlink_simple_request(msg);
-
-err_free_msg:
-	nlmsg_free(msg);
-
-	return err;
-}
-
-static int set_master_interface(const char *iface, unsigned int ifmaster)
-{
-	struct ifinfomsg rt_hdr = {
-		.ifi_family = IFLA_UNSPEC,
-	};
-	struct nl_msg *msg;
-	int err = 0;
-	int ret;
-
-	msg = nlmsg_alloc_simple(RTM_SETLINK, NLM_F_REQUEST | NLM_F_ACK);
-	if (!msg) {
-		return -ENOMEM;
-	}
-
-	ret = nlmsg_append(msg, &rt_hdr, sizeof(rt_hdr), NLMSG_ALIGNTO);
-	if (ret < 0) {
-		err = -ENOMEM;
-		goto err_free_msg;
-	}
-
-	ret = nla_put_string(msg, IFLA_IFNAME, iface);
-	if (ret < 0) {
-		err = -ENOMEM;
-		goto err_free_msg;
-	}
-
-	ret = nla_put_u32(msg, IFLA_MASTER, ifmaster);
-	if (ret < 0) {
-		err = -ENOMEM;
-		goto err_free_msg;
-	}
-
-	err = netlink_simple_request(msg);
-
-err_free_msg:
-	nlmsg_free(msg);
-
-	return err;
-}
-
-int interface(char *mesh_iface, int argc, char **argv)
-{
-	int i, optchar;
-	int ret;
-	unsigned int ifindex;
-	unsigned int ifmaster;
-	const char *long_op;
-	unsigned int cnt;
-	int rest_argc;
-	char **rest_argv;
-	bool manual_mode = false;
-
-	while ((optchar = getopt(argc, argv, "hM")) != -1) {
-		switch (optchar) {
-		case 'h':
-			interface_usage();
-			return EXIT_SUCCESS;
-		case 'M':
-			manual_mode = true;
-			break;
-		default:
-			interface_usage();
-			return EXIT_FAILURE;
-		}
-	}
-
-	rest_argc = argc - optind;
-	rest_argv = &argv[optind];
-
-	if (rest_argc == 0)
-		return print_interfaces(mesh_iface);
-
-	if ((strcmp(rest_argv[0], "add") != 0) && (strcmp(rest_argv[0], "a") != 0) &&
-	    (strcmp(rest_argv[0], "del") != 0) && (strcmp(rest_argv[0], "d") != 0) &&
-	    (strcmp(rest_argv[0], "create") != 0) && (strcmp(rest_argv[0], "c") != 0) &&
-	    (strcmp(rest_argv[0], "destroy") != 0) && (strcmp(rest_argv[0], "D") != 0)) {
-		fprintf(stderr, "Error - unknown argument specified: %s\n", rest_argv[0]);
-		interface_usage();
-		goto err;
-	}
-
-	if (strcmp(rest_argv[0], "destroy") == 0)
-		rest_argv[0][0] = 'D';
-
-	switch (rest_argv[0][0]) {
-	case 'a':
-	case 'd':
-		if (rest_argc == 1) {
-			fprintf(stderr,
-				"Error - missing interface name(s) after '%s'\n",
-				rest_argv[0]);
-			interface_usage();
-			goto err;
-		}
-		break;
-	case 'c':
-	case 'D':
-		if (rest_argc != 1) {
-			fprintf(stderr,
-				"Error - extra parameter after '%s'\n",
-				rest_argv[0]);
-			interface_usage();
-			goto err;
-		}
-		break;
-	default:
-		break;
-	}
-
-	switch (rest_argv[0][0]) {
-	case 'c':
-		ret = create_interface(mesh_iface);
-		if (ret < 0) {
-			fprintf(stderr,
-				"Error - failed to create batman-adv interface: %s\n",
-				strerror(-ret));
-			goto err;
-		}
-		return EXIT_SUCCESS;
-	case 'D':
-		ret = destroy_interface(mesh_iface);
-		if (ret < 0) {
-			fprintf(stderr,
-				"Error - failed to destroy batman-adv interface: %s\n",
-				strerror(-ret));
-			goto err;
-		}
-		return EXIT_SUCCESS;
-	default:
-		break;
-	}
-
-	/* get index of batman-adv interface - or try to create it */
-	ifmaster = if_nametoindex(mesh_iface);
-	if (!manual_mode && !ifmaster && rest_argv[0][0] == 'a') {
-		ret = create_interface(mesh_iface);
-		if (ret < 0) {
-			fprintf(stderr,
-				"Error - failed to create batman-adv interface: %s\n",
-				strerror(-ret));
-			goto err;
-		}
-
-		ifmaster = if_nametoindex(mesh_iface);
-	}
-
-	if (!ifmaster) {
-		ret = -ENODEV;
-		fprintf(stderr,
-			"Error - failed to find batman-adv interface: %s\n",
-			strerror(-ret));
-		goto err;
-	}
-
-	/* make sure that batman-adv is loaded or was loaded by create_interface */
-	if (!file_exists(module_ver_path)) {
-		fprintf(stderr, "Error - batman-adv module has not been loaded\n");
-		goto err;
-	}
-
-	for (i = 1; i < rest_argc; i++) {
-		ifindex = if_nametoindex(rest_argv[i]);
-
-		if (!ifindex) {
-			fprintf(stderr, "Error - interface does not exist: %s\n", rest_argv[i]);
-			continue;
-		}
-
-		if (rest_argv[0][0] == 'a')
-			ifindex = ifmaster;
-		else
-			ifindex = 0;
-
-		ret = set_master_interface(rest_argv[i], ifindex);
-		if (ret < 0) {
-			if (rest_argv[0][0] == 'a')
-				long_op = "add";
-			else
-				long_op = "delete";
-
-			fprintf(stderr, "Error - failed to %s interface %s: %s\n",
-				long_op, rest_argv[i], strerror(-ret));
-			goto err;
-		}
-	}
-
-	/* check if there is no interface left and then destroy mesh_iface */
-	if (!manual_mode && rest_argv[0][0] == 'd') {
-		cnt = count_interfaces(mesh_iface);
-		if (cnt == 0)
-			destroy_interface(mesh_iface);
-	}
-
-	return EXIT_SUCCESS;
-
-err:
-	return EXIT_FAILURE;
-}
-
 static void log_level_usage(void)
 {
 	fprintf(stderr, "Usage: batctl [options] loglevel [parameters] [level[ level[ level]]...]\n");
diff --git a/sys.h b/sys.h
index da2769d..be9480e 100644
--- a/sys.h
+++ b/sys.h
@@ -70,7 +70,6 @@  extern const char *sysfs_param_enable[];
 extern const char *sysfs_param_server[];
 extern const struct settings_data batctl_settings[BATCTL_SETTINGS_NUM];
 
-int interface(char *mesh_iface, int argc, char **argv);
 int handle_loglevel(char *mesh_iface, int argc, char **argv);
 int handle_sys_setting(char *mesh_iface, int setting, int argc, char **argv);
 int handle_gw_setting(char *mesh_iface, int argc, char **argv);