[PATCH] iw: Add OCB mode handling

[PATCH] iw: Add OCB mode handling

[Rostislav Lisovy]

Since the commit 6e0bd6c35b021dc73a81ebd1ef79761233c48b50
("cfg80211: 802.11p OCB mode handling") and
239281f803e2efdb77d906ef296086b6917e5d71
("mac80211: 802.11p OCB mode support")
does the Linux kernel support OCB mode. This commit adds
proper OCB mode handling.

Modify the command for device type setting to support OCB mode.
Add commands for "joining" and "leaving" the OCB mode network.
When joining two arguments are mandatory -- frequency and
channel bandwidth (5 or 10 MHz).

Signed-off-by: Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
---
 Makefile    |  2 +-
 interface.c |  3 +++
 ocb.c       | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 util.c      |  1 +
 4 files changed, 81 insertions(+), 1 deletion(-)
 create mode 100644 ocb.c

diff --git a/Makefile b/Makefile
index 58755dc..548591a 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,7 @@ CFLAGS ?= -O2 -g
 CFLAGS += -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration
 
 OBJS = iw.o genl.o event.o info.o phy.o \
-	interface.o ibss.o station.o survey.o util.o \
+	interface.o ibss.o station.o survey.o util.o ocb.o \
 	mesh.o mpath.o mpp.o scan.o reg.o version.o \
 	reason.o status.o connect.o link.o offch.o ps.o cqm.o \
 	bitrate.o wowlan.o coalesce.o roc.o p2p.o vendor.o
diff --git a/interface.c b/interface.c
index f8e39b3..80437bd 100644
--- a/interface.c
+++ b/interface.c
@@ -104,6 +104,9 @@ static int get_if_type(int *argc, char ***argv, enum nl80211_iftype *type,
 	    strcmp(tpstr, "ibss") == 0) {
 		*type = NL80211_IFTYPE_ADHOC;
 		return 0;
+	} else if (strcmp(tpstr, "ocb") == 0) {
+		*type = NL80211_IFTYPE_OCB;
+		return 0;
 	} else if (strcmp(tpstr, "monitor") == 0) {
 		*type = NL80211_IFTYPE_MONITOR;
 		return 0;
diff --git a/ocb.c b/ocb.c
new file mode 100644
index 0000000..7da05d1
--- /dev/null
+++ b/ocb.c
@@ -0,0 +1,76 @@
+#include <net/if.h>
+#include <errno.h>
+#include <string.h>
+
+#include "nl80211.h"
+#include "iw.h"
+
+SECTION(ocb);
+
+static int join_ocb(struct nl80211_state *state, struct nl_cb *cb,
+		    struct nl_msg *msg, int argc, char **argv,
+		    enum id_input id)
+{
+	unsigned long freq;
+	char *end;
+	int i;
+	static const struct {
+		const char *name;
+		unsigned int width;
+	} *chanmode_selected, chanmode[] = {
+		{ .name = "5MHZ",
+		  .width = NL80211_CHAN_WIDTH_5	},
+		{ .name = "10MHZ",
+		  .width = NL80211_CHAN_WIDTH_10 },
+	};
+
+	if (argc < 2)
+		return 1;
+
+	/* freq */
+	freq = strtoul(argv[0], &end, 10);
+	if (*end != '\0')
+		return 1;
+
+	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
+	argv++;
+	argc--;
+
+	/* channel width */
+	for (i = 0; i < ARRAY_SIZE(chanmode); i++) {
+		if (strcasecmp(chanmode[i].name, argv[0]) == 0) {
+			chanmode_selected = &chanmode[i];
+			break;
+		}
+	}
+	if (chanmode_selected) {
+		NLA_PUT_U32(msg, NL80211_ATTR_CHANNEL_WIDTH,
+			    chanmode_selected->width);
+		NLA_PUT_U32(msg, NL80211_ATTR_CENTER_FREQ1, freq);
+
+		argv++;
+		argc--;
+	} else {
+		return 1;
+	}
+
+	return 0;
+
+nla_put_failure:
+	return -ENOBUFS;
+}
+COMMAND(ocb, join, "<freq in MHz> <5MHZ|10MHZ>",
+	NL80211_CMD_JOIN_OCB, 0, CIB_NETDEV, join_ocb,
+	"Join the OCB mode network.");
+
+static int leave_ocb(struct nl80211_state *state, struct nl_cb *cb,
+		     struct nl_msg *msg, int argc, char **argv,
+		     enum id_input id)
+{
+	if (argc)
+		return 1;
+
+	return 0;
+}
+COMMAND(ocb, leave, NULL, NL80211_CMD_LEAVE_OCB, 0, CIB_NETDEV, leave_ocb,
+	"Leave the OCB mode network.");
diff --git a/util.c b/util.c
index 7b51b23..411fea1 100644
--- a/util.c
+++ b/util.c
@@ -133,6 +133,7 @@ static const char *ifmodes[NL80211_IFTYPE_MAX + 1] = {
 	"P2P-client",
 	"P2P-GO",
 	"P2P-device",
+	"outside context of a BSS",
 };
 
 static char modebuf[100];
-- 
2.0.0.rc4

Re: [PATCH] iw: Add OCB mode handling

[Johannes Berg]

On Mon, 2015-01-12 at 13:49 +0100, Rostislav Lisovy wrote:
> Since the commit 6e0bd6c35b021dc73a81ebd1ef79761233c48b50
> ("cfg80211: 802.11p OCB mode handling") and
> 239281f803e2efdb77d906ef296086b6917e5d71
> ("mac80211: 802.11p OCB mode support")
> does the Linux kernel support OCB mode. This commit adds
> proper OCB mode handling.
> 
> Modify the command for device type setting to support OCB mode.
> Add commands for "joining" and "leaving" the OCB mode network.
> When joining two arguments are mandatory -- frequency and
> channel bandwidth (5 or 10 MHz).

Applied, thanks.

johannes