o add support for controlling the power of transmitted frames

o add support for controlling the 11g protection mechanism used
  to protect OFDM frames in a mixed 11b/g network

Reviewed by:	imp

sys/net80211/ieee80211_ioctl.c

@@ -873,6 +873,15 @@ ieee80211_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 		case IEEE80211_IOC_RTSTHRESHOLD:
 			ireq->i_val = ic->ic_rtsthreshold;
 			break;
+		case IEEE80211_IOC_PROTMODE:
+			ireq->i_val = ic->ic_protmode;
+			break;
+		case IEEE80211_IOC_TXPOWER:
+			if ((ic->ic_caps & IEEE80211_C_TXPMGT) == 0)
+				error = EINVAL;
+			else
+				ireq->i_val = ic->ic_txpower;
+			break;
 		default:
 			error = EINVAL;
 			break;
@@ -1015,6 +1024,29 @@ ieee80211_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 			ic->ic_rtsthreshold = ireq->i_val;
 			error = ENETRESET;
 			break;
+		case IEEE80211_IOC_PROTMODE:
+			if (ireq->i_val > IEEE80211_PROT_RTSCTS) {
+				error = EINVAL;
+				break;
+			}
+			ic->ic_protmode = ireq->i_val;
+			/* NB: if not operating in 11g this can wait */
+			if (ic->ic_curmode == IEEE80211_MODE_11G)
+				error = ENETRESET;
+			break;
+		case IEEE80211_IOC_TXPOWER:
+			if ((ic->ic_caps & IEEE80211_C_TXPMGT) == 0) {
+				error = EINVAL;
+				break;
+			}
+			if (!(IEEE80211_TXPOWER_MIN < ireq->i_val &&
+			      ireq->i_val < IEEE80211_TXPOWER_MAX)) {
+				error = EINVAL;
+				break;
+			}
+			ic->ic_txpower = ireq->i_val;
+			error = ENETRESET;
+			break;
 		default:
 			error = EINVAL;
 			break;

sys/net80211/ieee80211_ioctl.h

@@ -119,6 +119,11 @@ struct ieee80211req {
 #define 	IEEE80211_POWERSAVE_ON		IEEE80211_POWERSAVE_CAM
 #define IEEE80211_IOC_POWERSAVESLEEP	11
 #define	IEEE80211_IOC_RTSTHRESHOLD	12
+#define IEEE80211_IOC_PROTMODE		13
+#define 	IEEE80211_PROTMODE_OFF		0
+#define 	IEEE80211_PROTMODE_CTS		1
+#define 	IEEE80211_PROTMODE_RTSCTS	2
+#define IEEE80211_IOC_TXPOWER		14
 
 #ifndef IEEE80211_CHAN_ANY
 #define	IEEE80211_CHAN_ANY	0xffff		/* token for ``any channel'' */

sys/net80211/ieee80211_node.c

@@ -102,6 +102,7 @@ ieee80211_node_lateattach(struct ifnet *ifp)
 
 	ic->ic_bss = (*ic->ic_node_alloc)(ic);
 	KASSERT(ic->ic_bss != NULL, ("unable to setup inital BSS node"));
+	ic->ic_txpower = IEEE80211_TXPOWER_MAX;
 	ic->ic_bss->ni_chan = IEEE80211_CHAN_ANYC;
 }
 

sys/net80211/ieee80211_proto.c

@@ -102,6 +102,7 @@ ieee80211_proto_attach(struct ifnet *ifp)
 #endif
 	ic->ic_fragthreshold = 2346;		/* XXX not used yet */
 	ic->ic_fixed_rate = -1;			/* no fixed rate */
+	ic->ic_protmode = IEEE80211_PROT_CTSONLY;
 
 	mtx_init(&ic->ic_mgtq.ifq_mtx, ifp->if_xname, "mgmt send q", MTX_DEF);
 

sys/net80211/ieee80211_var.h

@@ -49,6 +49,9 @@
 #define	IEEE80211_CHAN_ANYC \
 	((struct ieee80211_channel *) IEEE80211_CHAN_ANY)
 
+#define	IEEE80211_TXPOWER_MAX	100	/* max power */
+#define	IEEE80211_TXPOWER_MIN	0	/* kill radio (if possible) */
+
 enum ieee80211_phytype {
 	IEEE80211_T_DS,			/* direct sequence spread spectrum */
 	IEEE80211_T_FH,			/* frequency hopping */
@@ -76,6 +79,15 @@ enum ieee80211_opmode {
 	IEEE80211_M_MONITOR	= 8	/* Monitor mode */
 };
 
+/*
+ * 802.11g protection mode.
+ */
+enum ieee80211_protmode {
+	IEEE80211_PROT_NONE	= 0,	/* no protection */
+	IEEE80211_PROT_CTSONLY	= 1,	/* CTS to self */
+	IEEE80211_PROT_RTSCTS	= 2,	/* RTS-CTS */
+};
+
 /*
  * Channels are specified by frequency and attributes.
  */
@@ -166,6 +178,7 @@ struct ieee80211com {
 	enum ieee80211_phytype	ic_phytype;	/* XXX wrong for multi-mode */
 	enum ieee80211_opmode	ic_opmode;	/* operation mode */
 	enum ieee80211_state	ic_state;	/* 802.11 state */
+	enum ieee80211_protmode	ic_protmode;	/* 802.11g protection mode */
 	struct ifmedia		ic_media;	/* interface media config */
 	struct bpf_if		*ic_rawbpf;	/* packet filter structure */
 	struct ieee80211_node	*ic_bss;	/* information for this node */
@@ -226,6 +239,8 @@ struct ieee80211com {
 #define IEEE80211_F_TXPOW_AUTO	0x00010000	/* TX Power: undefined */
 #define	IEEE80211_F_SHSLOT	0x00020000	/* CONF: short slot time */
 #define	IEEE80211_F_SHPREAMBLE	0x00040000	/* CONF: short preamble */
+#define	IEEE80211_F_USEPROT	0x00100000	/* STATUS: protection enabled */
+#define	IEEE80211_F_USEBARKER	0x00200000	/* STATUS: use barker preamble*/
 
 /* ic_caps */
 #define	IEEE80211_C_WEP		0x00000001	/* CAPABILITY: WEP available */