Index: bpf.c
===================================================================
RCS file: /home/ncvs/src/usr.bin/netstat/bpf.c,v
retrieving revision 1.7
diff -u -p -r1.7 bpf.c
--- bpf.c	27 Nov 2006 19:50:50 -0000	1.7
+++ bpf.c	2 Feb 2007 19:19:25 -0000
@@ -85,9 +85,9 @@ bpf_flags(struct xbpf_d *bd, char *flagb
 void
 bpf_stats(char *ifname)
 {
-	struct xbpf_d *d, *bd;
-	char *pname, flagbuf[12];
-	size_t size;
+	struct xbpf_d *d;
+	char *dp, *pname, flagbuf[12];
+	size_t rsize, size;
 
 	if (sysctlbyname("net.bpf.stats", NULL, &size,
 	    NULL, 0) < 0) {
@@ -96,30 +96,54 @@ bpf_stats(char *ifname)
 	}
 	if (size == 0)
 		return;
-	bd = malloc(size);
-	if (bd == NULL) {
+	dp = malloc(size);
+	if (dp == NULL) {
 		warn("malloc failed");
 		return;
 	}
-	if (sysctlbyname("net.bpf.stats", bd, &size,
+	if (sysctlbyname("net.bpf.stats", dp, &size,
 	    NULL, 0) < 0) {
 		warn("net.bpf.stats");
-		free(bd);
+		free(dp);
 		return;
 	}
-	printf("%5s %6s %6s %9s %9s %9s %5s %5s %s\n",
-	    "Pid", "Netif", "Flags", "Recv", "Drop", "Match", "Sblen",
-	    "Hblen", "Command");
-	for (d = &bd[0]; d < &bd[size / sizeof(*d)]; d++) {
+	if (aflag) {
+		printf("%5s %6s %6s %9s %9s %9s %9s %9s %5s %5s %s\n",
+		    "Pid", "Netif", "Flags", "Recv", "Send", "SErr", "Drop",
+		    "Match", "Sblen", "Hblen", "Command");
+	} else {
+		printf("%5s %6s %6s %9s %9s %9s %5s %5s %s\n",
+		    "Pid", "Netif", "Flags", "Recv", "Drop", "Match", "Sblen",
+		    "Hblen", "Command");
+	}
+
+	rsize = size;
+	d = (struct x_bpfd *)dp;
+
+	while (d->bd_size >= rsize) {
+		d = (struct x_bpfd *)dp;
+
 		if (ifname && strcmp(ifname, d->bd_ifname) != 0)
 			continue;
 		bpf_flags(d, flagbuf);
 		pname = bpf_pidname(d->bd_pid);
-		printf("%5d %6s %6s %9lu %9lu %9lu %5d %5d %s\n",
-		    d->bd_pid, d->bd_ifname, flagbuf,
-		    d->bd_rcount, d->bd_dcount, d->bd_fcount,
-		    d->bd_slen, d->bd_hlen, pname);
+		if (aflag) {
+			printf("%5d %6s %6s %9lu %9lu %9lu %9lu %9lu "
+			    "%5d %5d %s\n",
+			    d->bd_pid, d->bd_ifname, flagbuf,
+			    d->bd_rcount, d->bd_wcount, d->bd_ecount,
+			    d->bd_dcount, d->bd_fcount,
+			    d->bd_slen, d->bd_hlen, pname);
+		} else {
+			printf("%5d %6s %6s %9lu %9lu %9lu %5d %5d %s\n",
+			    d->bd_pid, d->bd_ifname, flagbuf,
+			    d->bd_rcount, d->bd_dcount, d->bd_fcount,
+			    d->bd_slen, d->bd_hlen, pname);
+		}
 		free(pname);
+
+		rsize -= d->d_bdsize;
+		dp += d->d_bdsize;
 	}
 	free(bd);
 }
Index: netstat.1
===================================================================
RCS file: /home/ncvs/src/usr.bin/netstat/netstat.1,v
retrieving revision 1.57
diff -u -p -r1.57 netstat.1
--- netstat.1	29 Sep 2006 15:20:46 -0000	1.57
+++ netstat.1	2 Feb 2007 19:19:25 -0000
@@ -195,6 +195,7 @@ The network manages a private pool of me
 .Bk -words
 .Nm
 .Fl B
+.Op Fl a
 .Op Fl I Ar interface
 .Ek
 .Xc
@@ -205,6 +206,9 @@ This includes information like
 how many packets have been matched, dropped and received by the
 bpf device, also information about current buffer sizes and device
 states.
+If
+.Fl a
+is also present, show write statistics.
 .It Xo
 .Bk -words
 .Nm