hwsim_test: Tool for testing data connectivity with mac80211_hwsim

This program can be used to verify that both unicast and broadcast
data frames can be transmitted successfully through mac80211_hwsim
interfaces.

mac80211_hwsim/tools/Makefile

@@ -0,0 +1,11 @@
+all: hwsim_test
+
+ifndef CC
+CC=gcc
+endif
+
+ifndef CFLAGS
+CFLAGS = -O2 -Wall -g
+endif
+
+hwsim_test: hwsim_test.o

mac80211_hwsim/tools/hwsim_test.c

@@ -0,0 +1,244 @@
+/*
+ * hwsim_test - Data connectivity test for mac80211_hwsim
+ * Copyright (c) 2009, Atheros Communications
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <netpacket/packet.h>
+#include <net/ethernet.h>
+#include <net/if.h>
+#include <arpa/inet.h>
+
+#define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
+#define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
+
+#define HWSIM_ETHERTYPE ETHERTYPE_IP
+#define HWSIM_PACKETLEN 1500
+
+static unsigned char addr1[ETH_ALEN], addr2[ETH_ALEN], bcast[ETH_ALEN];
+
+static void tx(int s, const char *ifname, int ifindex,
+	       const unsigned char *src, const unsigned char *dst)
+{
+	char buf[HWSIM_PACKETLEN], *pos;
+	struct ether_header *eth;
+	int i;
+
+	printf("TX: %s(ifindex=%d) " MACSTR " -> " MACSTR "\n",
+	       ifname, ifindex, MAC2STR(src), MAC2STR(dst));
+
+	eth = (struct ether_header *) buf;
+	memcpy(eth->ether_dhost, dst, ETH_ALEN);
+	memcpy(eth->ether_shost, src, ETH_ALEN);
+	eth->ether_type = htons(HWSIM_ETHERTYPE);
+	pos = (char *) (eth + 1);
+	for (i = 0; i < sizeof(buf) - sizeof(*eth); i++)
+		*pos++ = i;
+
+	if (send(s, buf, sizeof(buf), 0) < 0)
+		perror("send");
+}
+
+
+struct rx_result {
+	int rx_unicast1:1;
+	int rx_broadcast1:1;
+	int rx_unicast2:1;
+	int rx_broadcast2:1;
+};
+
+
+static void rx(int s, int iface, const char *ifname, int ifindex,
+	       struct rx_result *res)
+{
+	char buf[HWSIM_PACKETLEN + 1], *pos;
+	struct ether_header *eth;
+	int len, i;
+
+	len = recv(s, buf, sizeof(buf), 0);
+	if (len < 0) {
+		perror("recv");
+		return;
+	}
+	eth = (struct ether_header *) buf;
+
+	printf("RX: %s(ifindex=%d) " MACSTR " -> " MACSTR " (len=%d)\n",
+	       ifname, ifindex,
+	       MAC2STR(eth->ether_shost), MAC2STR(eth->ether_dhost), len);
+
+	if (len != HWSIM_PACKETLEN) {
+		printf("Ignore frame with unexpected RX length\n");
+		return;
+	}
+
+	pos = (char *) (eth + 1);
+	for (i = 0; i < sizeof(buf) - 1 - sizeof(*eth); i++) {
+		if ((unsigned char) *pos != (unsigned char) i) {
+			printf("Ignore frame with unexpected contents\n");
+			printf("i=%d received=0x%x expected=0x%x\n",
+			       i, (unsigned char) *pos, (unsigned char) i);
+			return;
+		}
+		pos++;
+	}
+
+	if (iface == 1 &&
+		   memcmp(eth->ether_dhost, addr1, ETH_ALEN) == 0 &&
+		   memcmp(eth->ether_shost, addr2, ETH_ALEN) == 0)
+		res->rx_unicast1 = 1;
+	else if (iface == 1 &&
+		   memcmp(eth->ether_dhost, bcast, ETH_ALEN) == 0 &&
+		   memcmp(eth->ether_shost, addr2, ETH_ALEN) == 0)
+		res->rx_broadcast1 = 1;
+	else if (iface == 2 &&
+		   memcmp(eth->ether_dhost, addr2, ETH_ALEN) == 0 &&
+		   memcmp(eth->ether_shost, addr1, ETH_ALEN) == 0)
+		res->rx_unicast2 = 1;
+	else if (iface == 2 &&
+		   memcmp(eth->ether_dhost, bcast, ETH_ALEN) == 0 &&
+		   memcmp(eth->ether_shost, addr1, ETH_ALEN) == 0)
+		res->rx_broadcast2 = 1;
+}
+
+
+int main(int argc, char *argv[])
+{
+	int s1 = -1, s2 = -1, ret = -1;
+	struct ifreq ifr;
+	int ifindex1, ifindex2;
+	struct sockaddr_ll ll;
+	fd_set rfds;
+	struct timeval tv;
+	struct rx_result res;
+
+	if (argc != 3) {
+		fprintf(stderr, "usage: hwsim_test <ifname1> <ifname2>\n");
+		return -1;
+	}
+
+	memset(bcast, 0xff, ETH_ALEN);
+
+	s1 = socket(PF_PACKET, SOCK_RAW, htons(HWSIM_ETHERTYPE));
+	if (s1 < 0) {
+		perror("socket");
+		goto fail;
+	}
+
+	s2 = socket(PF_PACKET, SOCK_RAW, htons(HWSIM_ETHERTYPE));
+	if (s2 < 0) {
+		perror("socket");
+		goto fail;
+	}
+
+	memset(&ifr, 0, sizeof(ifr));
+	strncpy(ifr.ifr_name, argv[1], sizeof(ifr.ifr_name));
+	if (ioctl(s1, SIOCGIFINDEX, &ifr) < 0) {
+		perror("ioctl[SIOCGIFINDEX]");
+		goto fail;
+	}
+	ifindex1 = ifr.ifr_ifindex;
+	if (ioctl(s1, SIOCGIFHWADDR, &ifr) < 0) {
+		perror("ioctl[SIOCGIFHWADDR]");
+		goto fail;
+	}
+	memcpy(addr1, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
+
+	memset(&ifr, 0, sizeof(ifr));
+	strncpy(ifr.ifr_name, argv[2], sizeof(ifr.ifr_name));
+	if (ioctl(s2, SIOCGIFINDEX, &ifr) < 0) {
+		perror("ioctl[SIOCGIFINDEX]");
+		goto fail;
+	}
+	ifindex2 = ifr.ifr_ifindex;
+	if (ioctl(s2, SIOCGIFHWADDR, &ifr) < 0) {
+		perror("ioctl[SIOCGIFHWADDR]");
+		goto fail;
+	}
+	memcpy(addr2, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
+
+	memset(&ll, 0, sizeof(ll));
+	ll.sll_family = PF_PACKET;
+	ll.sll_ifindex = ifindex1;
+	ll.sll_protocol = htons(HWSIM_ETHERTYPE);
+	if (bind(s1, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
+		perror("bind");
+		goto fail;
+	}
+
+	memset(&ll, 0, sizeof(ll));
+	ll.sll_family = PF_PACKET;
+	ll.sll_ifindex = ifindex2;
+	ll.sll_protocol = htons(HWSIM_ETHERTYPE);
+	if (bind(s2, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
+		perror("bind");
+		goto fail;
+	}
+
+	tx(s1, argv[1], ifindex1, addr1, addr2);
+	tx(s1, argv[1], ifindex1, addr1, bcast);
+	tx(s2, argv[2], ifindex2, addr2, addr1);
+	tx(s2, argv[2], ifindex2, addr2, bcast);
+
+	tv.tv_sec = 1;
+	tv.tv_usec = 0;
+
+	memset(&res, 0, sizeof(res));
+	for (;;) {
+		int r;
+		FD_ZERO(&rfds);
+		FD_SET(s1, &rfds);
+		FD_SET(s2, &rfds);
+
+		r = select(s2 + 1, &rfds, NULL, NULL, &tv);
+		if (r < 0) {
+			perror("select");
+			goto fail;
+		}
+
+		if (r == 0)
+			break; /* timeout */
+
+		if (FD_SET(s1, &rfds))
+			rx(s1, 1, argv[1], ifindex1, &res);
+		if (FD_SET(s2, &rfds))
+			rx(s2, 2, argv[2], ifindex2, &res);
+
+		if (res.rx_unicast1 && res.rx_broadcast1 &&
+		    res.rx_unicast2 && res.rx_broadcast2) {
+			ret = 0;
+			break;
+		}
+	}
+
+	if (ret) {
+		printf("Did not receive all expected frames:\n"
+		       "rx_unicast1=%d rx_broadcast1=%d "
+		       "rx_unicast2=%d rx_broadcast2=%d\n",
+		       res.rx_unicast1, res.rx_broadcast1,
+		       res.rx_unicast2, res.rx_broadcast2);
+	} else {
+		printf("Both unicast and broadcast working in both "
+		       "directions\n");
+	}
+
+fail:
+	close(s1);
+	close(s2);
+
+	return ret;
+}