--- libaitio/example/bpf.c	2013/06/25 17:06:02	1.1.2.6
+++ libaitio/example/bpf.c	2013/06/26 13:33:55	1.1.2.10
@@ -78,15 +78,9 @@ ShowPkt(void *buffer)
 
 	assert(buffer);
 
-#ifdef __FreeBSD__
-	snprintf(szLine, BUFSIZ, "#Packet length: %d\n>>> Ethernet ...\n", flg ? bzh->bzh_kernel_len : bpf->bh_datalen);
-	strlcat(szShow, szLine, USHRT_MAX);
-	eth = (struct ether_header *) (buffer + (flg ? bzh->bzh_kernel_len : bpf->bh_hdrlen));
-#else
 	snprintf(szLine, BUFSIZ, "#Packet length: %d\n>>> Ethernet ...\n", bpf->bh_datalen);
 	strlcat(szShow, szLine, USHRT_MAX);
 	eth = (struct ether_header *) (buffer + bpf->bh_hdrlen);
-#endif
 
 	switch (ntohs(eth->ether_type)) {
 		case ETHERTYPE_ARP:
@@ -300,9 +294,9 @@ main(int argc, char **argv)
 		strlcpy(szStr, *argv, sizeof szStr);
 
 #ifdef __FreeBSD__
-	dev = io_etherOpen(szStr, O_RDWR, 42, (u_int*) &siz, &bz);
+	dev = io_etherOpen(szStr, O_RDWR | O_NONBLOCK, 42, (u_int*) &siz, (flg) ? &bz : NULL);
 	if (dev == -1)
-		dev = io_etherOpen(szStr, O_RDWR, 42, (u_int*) &siz, NULL);
+		dev = io_etherOpen(szStr, O_RDWR | O_NONBLOCK, 42, (u_int*) &siz, NULL);
 #else
 	dev = io_etherOpen(szStr, O_RDWR, 42, (u_int*) &siz, NULL);
 #endif
@@ -341,10 +335,12 @@ main(int argc, char **argv)
 	if (mode == 'R') {
 		pfd.events = POLLIN;
 		for (i = 0; i < count; i++) {
-			if (poll(&pfd, 1, -1) == -1)
+			if ((ret = poll(&pfd, 1, -1)) == -1)
 				break;
 
 			ret = io_etherRecv(dev, buffer, siz, bz);
+			if (!ret)
+				continue;
 			if (ret == -1)
 				printf("%d) io_etherRecv(%d) #%d - %s\n", i, ret, 
 						io_GetErrno(), io_GetError());