[thirdparty/iw.git] / connect.c

#include <errno.h>

#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include <netlink/msg.h>
#include <netlink/attr.h>

#include "nl80211.h"
#include "iw.h"

static int iw_conn(struct nl80211_state *state, struct nl_cb *cb,
		   struct nl_msg *msg, int argc, char **argv)
{
	char *end;
	unsigned char bssid[6];
	int freq;

	if (argc < 1)
		return 1;

	/* SSID */
	NLA_PUT(msg, NL80211_ATTR_SSID, strlen(argv[0]), argv[0]);
	argv++;
	argc--;

	/* freq */
	if (argc) {
		freq = strtoul(argv[0], &end, 10);
		if (*end == '\0') {
			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
			argv++;
			argc--;
		}
	}

	/* bssid */
	if (argc) {
		if (mac_addr_a2n(bssid, argv[0]) == 0) {
			NLA_PUT(msg, NL80211_ATTR_MAC, 6, bssid);
			argv++;
			argc--;
		}
	}

	if (!argc)
		return 0;

	if (strcmp(*argv, "key") != 0 && strcmp(*argv, "keys") != 0)
		return 1;

	argv++;
	argc--;

	return parse_keys(msg, argv, argc);
 nla_put_failure:
	return -ENOSPC;
}

static int disconnect(struct nl80211_state *state,
		      struct nl_cb *cb,
		      struct nl_msg *msg,
		      int argc, char **argv)
{
	return 0;
}
TOPLEVEL(disconnect, NULL,
	NL80211_CMD_DISCONNECT, 0, CIB_NETDEV, disconnect,
	"Disconnect from the current network.");

static int iw_connect(struct nl80211_state *state, struct nl_cb *cb,
		      struct nl_msg *msg, int argc, char **argv)
{
	char **conn_argv, *dev = argv[0];
	static const __u32 cmds[] = {
		NL80211_CMD_CONNECT,
	};
	struct print_event_args printargs = { };
	int conn_argc, err;
	bool wait = false;
	int i;

	/* strip "wlan0 connect" */
	argc -= 2;
	argv += 2;

	/* check -w */
	if (argc && strcmp(argv[0], "-w") == 0) {
		wait = true;
		argc--;
		argv++;
	}

	conn_argc = 3 + argc;
	conn_argv = calloc(conn_argc, sizeof(*conn_argv));
	if (!conn_argv)
		return -ENOMEM;
	conn_argv[0] = dev;
	conn_argv[1] = "connect";
	conn_argv[2] = "establish";
	for (i = 0; i < argc; i++)
		conn_argv[i + 3] = argv[i];
	err = handle_cmd(state, II_NETDEV, conn_argc, conn_argv);
	free(conn_argv);
	if (err)
		return err;

	if (!wait)
		return 0;

	/*
	 * WARNING: DO NOT COPY THIS CODE INTO YOUR APPLICATION
	 *
	 * This code has a bug, which requires creating a separate
	 * nl80211 socket to fix:
	 * It is possible for a NL80211_CMD_NEW_SCAN_RESULTS or
	 * NL80211_CMD_SCAN_ABORTED message to be sent by the kernel
	 * before (!) we listen to it, because we only start listening
	 * after we send our scan request.
	 *
	 * Doing it the other way around has a race condition as well,
	 * if you first open the events socket you may get a notification
	 * for a previous scan.
	 *
	 * The only proper way to fix this would be to listen to events
	 * before sending the command, and for the kernel to send the
	 * connect request along with the event, so that you can match
	 * up whether the connect _you_ requested was finished or aborted.
	 *
	 * Alas, the kernel doesn't do that (yet).
	 */

	__listen_events(state, ARRAY_SIZE(cmds), cmds, &printargs);
	return 0;
}
TOPLEVEL(connect, "[-w] <SSID> [<freq in MHz>] [<bssid>] [key 0:abcde d:1:6162636465]",
	0, 0, CIB_NETDEV, iw_connect,
	"Join the network with the given SSID (and frequency, BSSID).\n"
	"With -w, wait for the connect to finish or fail.");
HIDDEN(connect, establish, "", NL80211_CMD_CONNECT, 0, CIB_NETDEV, iw_conn);
Commit	Line	Data
99dde7aa JB	1	#include <errno.h>
	2
	3	#include <netlink/genl/genl.h>
	4	#include <netlink/genl/family.h>
	5	#include <netlink/genl/ctrl.h>
	6	#include <netlink/msg.h>
	7	#include <netlink/attr.h>
	8
	9	#include "nl80211.h"
	10	#include "iw.h"
	11
7fabd346 JB	12	static int iw_conn(struct nl80211_state state, struct nl_cb cb,
7fabd346 JB	13	struct nl_msg msg, int argc, char *argv)
99dde7aa JB	14	{
99dde7aa JB	15	char *end;
51e9bd80	16	unsigned char bssid[6];
1e03690e	17	int freq;
99dde7aa JB	18
	19	if (argc < 1)
	20	return 1;
	21
	22	/* SSID */
	23	NLA_PUT(msg, NL80211_ATTR_SSID, strlen(argv[0]), argv[0]);
	24	argv++;
	25	argc--;
	26
	27	/* freq */
	28	if (argc) {
	29	freq = strtoul(argv[0], &end, 10);
	30	if (*end == '\0') {
	31	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
	32	argv++;
	33	argc--;
	34	}
	35	}
	36
	37	/* bssid */
	38	if (argc) {
51e9bd80 JB	39	if (mac_addr_a2n(bssid, argv[0]) == 0) {
	40	NLA_PUT(msg, NL80211_ATTR_MAC, 6, bssid);
	41	argv++;
	42	argc--;
	43	}
99dde7aa JB	44	}
99dde7aa JB	45
1e03690e JB	46	if (!argc)
1e03690e JB	47	return 0;
99dde7aa	48
1e03690e JB	49	if (strcmp(argv, "key") != 0 && strcmp(argv, "keys") != 0)
1e03690e JB	50	return 1;
ded1f078	51
1e03690e JB	52	argv++;
1e03690e JB	53	argc--;
51e9bd80	54
1e03690e	55	return parse_keys(msg, argv, argc);
99dde7aa JB	56	nla_put_failure:
	57	return -ENOSPC;
	58	}
	59
	60	static int disconnect(struct nl80211_state *state,
	61	struct nl_cb *cb,
	62	struct nl_msg *msg,
	63	int argc, char **argv)
	64	{
	65	return 0;
	66	}
	67	TOPLEVEL(disconnect, NULL,
	68	NL80211_CMD_DISCONNECT, 0, CIB_NETDEV, disconnect,
	69	"Disconnect from the current network.");
7fabd346 JB	70
	71	static int iw_connect(struct nl80211_state state, struct nl_cb cb,
	72	struct nl_msg msg, int argc, char *argv)
	73	{
	74	char *conn_argv, dev = argv[0];
	75	static const __u32 cmds[] = {
	76	NL80211_CMD_CONNECT,
	77	};
	78	struct print_event_args printargs = { };
	79	int conn_argc, err;
	80	bool wait = false;
	81	int i;
	82
	83	/* strip "wlan0 connect" */
	84	argc -= 2;
	85	argv += 2;
	86
	87	/* check -w */
	88	if (argc && strcmp(argv[0], "-w") == 0) {
	89	wait = true;
	90	argc--;
	91	argv++;
	92	}
	93
	94	conn_argc = 3 + argc;
	95	conn_argv = calloc(conn_argc, sizeof(*conn_argv));
	96	if (!conn_argv)
	97	return -ENOMEM;
	98	conn_argv[0] = dev;
4698bfc2	99	conn_argv[1] = "connect";
7fabd346 JB	100	conn_argv[2] = "establish";
	101	for (i = 0; i < argc; i++)
	102	conn_argv[i + 3] = argv[i];
	103	err = handle_cmd(state, II_NETDEV, conn_argc, conn_argv);
	104	free(conn_argv);
	105	if (err)
	106	return err;
	107
	108	if (!wait)
	109	return 0;
	110
	111	/*
	112	* WARNING: DO NOT COPY THIS CODE INTO YOUR APPLICATION
	113	*
	114	* This code has a bug, which requires creating a separate
	115	* nl80211 socket to fix:
	116	* It is possible for a NL80211_CMD_NEW_SCAN_RESULTS or
	117	* NL80211_CMD_SCAN_ABORTED message to be sent by the kernel
	118	* before (!) we listen to it, because we only start listening
	119	* after we send our scan request.
	120	*
	121	* Doing it the other way around has a race condition as well,
	122	* if you first open the events socket you may get a notification
	123	* for a previous scan.
	124	*
	125	* The only proper way to fix this would be to listen to events
	126	* before sending the command, and for the kernel to send the
	127	* connect request along with the event, so that you can match
	128	* up whether the connect _you_ requested was finished or aborted.
	129	*
	130	* Alas, the kernel doesn't do that (yet).
	131	*/
	132
	133	__listen_events(state, ARRAY_SIZE(cmds), cmds, &printargs);
	134	return 0;
	135	}
	136	TOPLEVEL(connect, "[-w] <SSID> [<freq in MHz>] [<bssid>] [key 0:abcde d:1:6162636465]",
	137	0, 0, CIB_NETDEV, iw_connect,
	138	"Join the network with the given SSID (and frequency, BSSID).\n"
	139	"With -w, wait for the connect to finish or fail.");
4698bfc2	140	HIDDEN(connect, establish, "", NL80211_CMD_CONNECT, 0, CIB_NETDEV, iw_conn);