From 10ed7159f0d412695ac8cf4444f5d9f7a0cc1a34 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Thu, 16 Jan 2003 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2003-01-16

---
 pc/wavelan.c | 68 ++++++++++++++++++++++++++++++++++++++--------------
 pc/wavelan.h | 19 ++++++++++++++-
 2 files changed, 68 insertions(+), 19 deletions(-)

diff --git a/pc/wavelan.c b/pc/wavelan.c
index 26174c7913cb140998e5cb2ebc2f2637fd067948..4d62756d838f172a102a30cd289ecb01df3e490a 100644
--- a/pc/wavelan.c
+++ b/pc/wavelan.c
@@ -528,27 +528,51 @@ w_txdone(Ctlr* ctlr, int sts)
 		ctlr->ntx++;
 }
 
-static int
-w_stats(Ctlr* ctlr)
+static void
+w_stats(Ctlr* ctlr, int len)
 {
-	int i, rc, sp;
-	Wltv ltv;
+	int i, rc;
 	ulong* p = (ulong*)&ctlr->WStats;
 	ulong* pend = (ulong*)&ctlr->end;
 
+	for (i = 0; i < len && p < pend; i++){
+		rc = csr_ins(ctlr, WR_Data1);
+		if(rc > 0xf000)
+			rc = ~rc & 0xffff;
+		p[i] += rc;
+	}
+}
+
+static void
+w_scan(Ctlr* ctlr, int len)
+{
+	int i;
+
+	for (i = 0; i < len && i < nelem(ctlr->wscan); i++)
+		ctlr->wscan[i] = csr_ins(ctlr, WR_Data1);
+	ctlr->nwscan = i;
+}
+
+static int
+w_info(Ctlr* ctlr)
+{
+	int sp;
+	Wltv ltv;
+
 	sp = csr_ins(ctlr, WR_InfoId);
 	ltv.len = ltv.type = 0;
 	w_read(ctlr, sp, 0, &ltv, 4);
-	if(ltv.type == WTyp_Stats){
-		ltv.len--;
-		for (i = 0; i < ltv.len && p < pend; i++){
-			rc = csr_ins(ctlr, WR_Data1);
-			if(rc > 0xf000)
-				rc = ~rc & 0xffff;
-			p[i] += rc;
-		}
+	ltv.len--;
+	switch(ltv.type){
+	case WTyp_Stats:
+		w_stats(ctlr, ltv.len);
+		return 0;
+	case WTyp_Scan:
+		print("calling w_scan %d\n", ltv.len);
+		w_scan(ctlr, ltv.len);
 		return 0;
 	}
+	print("got type %d\n", ltv.len);
 	return -1;
 }
 
@@ -588,7 +612,7 @@ w_intr(Ether *ether)
 	}
 	if(rc & WInfoEv){
 		ctlr->ninfo++;
-		w_stats(ctlr);
+		w_info(ctlr);
 		csr_ack(ctlr, WInfoEv);
 	}
 	if(rc & WTxErrEv){
@@ -655,7 +679,7 @@ w_timer(void* arg)
 			}
 			if((ctlr->ticks % 120) == 0)
 			if(ctlr->txbusy == 0)
-				w_cmd(ctlr, WCmdAskStats, WTyp_Stats);
+				w_cmd(ctlr, WCmdEnquire, WTyp_Stats);
 		}
 		iunlock(ctlr);
 	}
@@ -771,7 +795,7 @@ w_ifstat(Ether* ether, void* a, long n, ulong offset)
 	if(n == 0 || offset != 0)
 		return 0;
 
-	p = malloc(READSTR);
+	p = malloc(2*READSTR);
 	l = 0;
 
 	PRINTSTAT("Signal: %d\n", ctlr->signal-149);
@@ -823,7 +847,7 @@ w_ifstat(Ether* ether, void* a, long n, ulong offset)
 	PRINTSTAT("Channel: %d\n", ltv_ins(ctlr, WTyp_Chan));
 	PRINTSTAT("AP density: %d\n", ltv_ins(ctlr, WTyp_ApDens));
 	PRINTSTAT("Promiscuous mode: %d\n", ltv_ins(ctlr, WTyp_Prom));
-	if(i == 3)
+	if(i == WPTypeAdHoc)
 		PRINTSTAT("SSID name: %s\n", ltv_inname(ctlr, WTyp_NetName));
 	else {
 		Wltv ltv;
@@ -850,6 +874,11 @@ w_ifstat(Ether* ether, void* a, long n, ulong offset)
 			PRINTSTAT("Transmit key id: %d\n", txid);
 		}
 	}
+	if(ctlr->nwscan){
+		for(i = 0; i < ctlr->nwscan; i++)
+			PRINTSTAT("ws: %4.4ux\n", ctlr->wscan[i]);
+		ctlr->nwscan = 0;
+	}
 	iunlock(ctlr);
 
 	PRINTSTAT("ntxuframes: %lud\n", ctlr->ntxuframes);
@@ -892,14 +921,17 @@ w_option(Ctlr* ctlr, char* buf, long n)
 	r = 0;
 
 	cb = parsecmd(buf, n);
-	if(cb->nf < 2)
+	if(cistrcmp(cb->f[0], "scan") == 0){
+		w_cmd(ctlr, WCmdEnquire, WTyp_Scan);
+	}
+	else if(cb->nf < 2)
 		r = -1;
 	else if(cistrcmp(cb->f[0], "essid") == 0){
 		if(cistrcmp(cb->f[1],"default") == 0)
 			p = "";
 		else
 			p = cb->f[1];
-		if(ctlr->ptype == 3){
+		if(ctlr->ptype == WPTypeAdHoc){
 			memset(ctlr->netname, 0, sizeof(ctlr->netname));
 			strncpy(ctlr->netname, p, WNameLen);
 		}
diff --git a/pc/wavelan.h b/pc/wavelan.h
index 8ec56974fa9f0277494a5d9414fd7b5aebed6d25..fd1449f28bcfdd97038a8b9042af5b57e1bb036f 100644
--- a/pc/wavelan.h
+++ b/pc/wavelan.h
@@ -7,6 +7,7 @@
 enum
 {
 	WTyp_Stats	= 0xf100,
+	WTyp_Scan	= 0xf101,
 	WTyp_Ptype	= 0xfc00,
 	WTyp_Mac	= 0xfc01,
 	WTyp_WantName	= 0xfc02,
@@ -69,7 +70,7 @@ enum
 		WCmdDis		= 0x0002,
 		WCmdTx		= 0x000b,
 		WCmdMalloc	= 0x000a,
-		WCmdAskStats	= 0x0011,
+		WCmdEnquire	= 0x0011,
 		WCmdMsk		= 0x003f,
 		WCmdAccRd	= 0x0021,
 		WCmdReclaim	= 0x0100,
@@ -134,6 +135,7 @@ typedef struct Wltv	Wltv;
 typedef struct WFrame	WFrame;
 typedef struct Stats	Stats;
 typedef struct WStats	WStats;
+typedef struct WScan	WScan;
 typedef struct WKey	WKey;
 
 struct WStats
@@ -162,6 +164,18 @@ struct WStats
 	ulong	end;
 };
 
+struct WScan
+{
+	ushort	chan;			/* dss channel */
+	ushort	noise;			/* average noise in the air */
+	ushort	signal;			/* signal strength */
+	uchar	bssid[Eaddrlen];	/* MAC address of the ap */
+	ushort	interval;		/* beacon transmit interval */
+	ushort	capinfo;		/* capability bits (0-ess, 1-ibss, 4-privacy [wep]) */
+	ushort	ssid_len;		/* ssid length */
+	uchar	ssid[WNameLen];		/* ssid (ap name) */
+};
+
 struct WFrame
 {
 	ushort	sts;
@@ -289,6 +303,9 @@ struct Ctlr
 
 	Stats;
 	WStats;
+
+	int	nwscan;
+	ushort	wscan[128];
 };
 
 extern char* wavenames[];