[ath9k-devel] [PATCH v0 6/6] support for antenna configuration profiles

[Daniel Golle <dgolle@allnet.de>]

This adds support for controlling an external antenna switch to the iw userspace
tool.
The part in info.c doesn't work properly yet, somehow nla_parse doesn't
like NL80211_ATTR_WIPHY_EXTANT_SUPP_PROFILES... Anyone can spot the mistake here
maybe? (or is there anything wrong in my implementation in nl80211.c...?)

Signed-off-by: Daniel Golle <dgolle@allnet.de>

--- a/iw-3.1/phy.c
+++ b/iw-3.1/phy.c
@@ -333,3 +333,30 @@ COMMAND(set, antenna, "<bitmap> | all |
 	NL80211_CMD_SET_WIPHY, 0, CIB_PHY, handle_antenna,
 	"Set a bitmap of allowed antennas to use for TX and RX.\n"
 	"The driver may reject antenna configurations it cannot support.");
+
+static int handle_extant(struct nl80211_state *state,
+			  struct nl_cb *cb,
+			  struct nl_msg *msg,
+			  int argc, char **argv)
+{
+	char *end;
+	__u32 extant;
+
+	if (argc == 1) {
+		extant = strtoul(argv[0], &end, 0);
+		if (*end)
+			return 1;
+	} else
+		return 1;
+
+	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_EXTANT_STATE, extant);
+
+	return 0;
+
+ nla_put_failure:
+	return -ENOBUFS;
+}
+COMMAND(set, extant, "<profile>",
+	NL80211_CMD_SET_WIPHY, 0, CIB_PHY, handle_extant,
+	"Select the external antenna switch configuration profile.\n"
+	"The driver accepts only profiles defined for the hardware.");
--- a/iw-3.1/info.c
+++ b/iw-3.1/info.c
@@ -180,6 +197,65 @@ static int print_phy_handler(struct nl_m
 		       nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_TX]),
 		       nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_RX]));
 
+	if (tb_msg[NL80211_ATTR_WIPHY_EXTANT_SUPPORT])
+	printf("\tConfigurable external antenna switch detected\n");
+
+
+	if (tb_msg[NL80211_ATTR_WIPHY_EXTANT_SUPP_PROFILES]) {
+		struct nlattr *nl_easp, *tb_easp[NL80211_EASP_ATTR_MAX + 1];
+		int err, rem_easp;
+		int current_profile, num_profiles = 0;
+		__u8 id;
+		static struct nla_policy easp_policy[NL80211_EASP_ATTR_MAX + 1] = {
+			[NL80211_EASP_ATTR_ID] = { .type = NLA_U32 },
+			[NL80211_EASP_ATTR_NAME] = { },
+			[NL80211_EASP_ATTR_DESC] = { },
+		};
+
+		if (tb_msg[NL80211_ATTR_WIPHY_EXTANT_STATE]) {
+			current_profile = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_EXTANT_STATE]);
+			printf("\tSelected Profile: %x\n", current_profile);
+		}
+		else
+			current_profile = -1;
+
+		nla_for_each_nested(nl_easp, tb_msg[NL80211_ATTR_WIPHY_EXTANT_SUPP_PROFILES], rem_easp)
+			num_profiles++;
+
+		printf("\tSupports %u antenna switch profiles:\n", num_profiles);
+
+		nla_for_each_nested(nl_easp, tb_msg[NL80211_ATTR_WIPHY_EXTANT_SUPP_PROFILES], rem_easp)
+		{
+			char *c;
+			int i,l;
+			c=(char*) nla_data(nl_easp);
+			l=nla_len(nl_easp);
+			printf("len(nla_msg)=%u\n", l);
+			printf("raw message follows:\n");
+			for(i=0;i<l;i++) {
+				printf("%02x ", c[i]);
+				if (i>0 && (i%32) == 0)
+					printf("\n");
+			};
+			printf("\n-----------------\n");
+
+			err = nla_parse(tb_easp, NL80211_EASP_ATTR_MAX, nla_data(nl_easp), nla_len(nl_easp), easp_policy);
+
+			if (err || !tb_easp[NL80211_EASP_ATTR_ID] || !tb_easp[NL80211_EASP_ATTR_NAME] || !tb_easp[NL80211_EASP_ATTR_DESC]) {
+				printf("cannot parse antenna switch profile, err %x\n", err);
+				goto broken_profile;
+			}
+			id = nla_get_u32(tb_easp[NL80211_EASP_ATTR_ID]);
+			printf("\t\t%u\t%s\t(%s)", id, nla_get_string(tb_easp[NL80211_EASP_ATTR_NAME]),
+				nla_get_string(tb_easp[NL80211_EASP_ATTR_DESC]));
+			if ( id == current_profile )
+				printf(" [*]");
+			printf("\n");
+		}
+broken_profile:
+		;
+	}
+
 	if (tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 		printf("\tSupported interface modes:\n");
 		nla_for_each_nested(nl_mode, tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES], rem_mode)