Add a regression test for ethernet link-layer multicast memberships.

2 files changed, 263 insertions, 0 deletions

diff --git a/tools/regression/ethernet/ethermulti/Makefile b/tools/regression/ethernet/ethermulti/Makefile
new file mode 100644
index 000000000000..e0770b6a638c
--- /dev/null
+++ b/tools/regression/ethernet/ethermulti/Makefile
@@ -0,0 +1,7 @@
+#	$FreeBSD$
+
+PROG=	ethermulti
+SRCS+=	ethermulti.c
+NO_MAN=
+
+.include <bsd.prog.mk>
diff --git a/tools/regression/ethernet/ethermulti/ethermulti.c b/tools/regression/ethernet/ethermulti/ethermulti.c
new file mode 100644
index 000000000000..61f0cddb4a10
--- /dev/null
+++ b/tools/regression/ethernet/ethermulti/ethermulti.c
@@ -0,0 +1,256 @@
+/*-
+ * Copyright (c) 2007 Bruce M. Simpson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/if_types.h>
+#include <net/ethernet.h>
+
+#include <err.h>
+#include <errno.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <ifaddrs.h>
+
+static int dorandom = 0;
+static int verbose = 0;
+static char *ifname = NULL;
+
+/*
+ * The test tool exercises IP-level socket options by interrogating the
+ * getsockopt()/setsockopt() APIs.  It does not currently test that the
+ * intended semantics of each option are implemented (i.e., that setting IP
+ * options on the socket results in packets with the desired IP options in
+ * it).
+ */
+
+/*
+ * get_socket() is a wrapper function that returns a socket of the specified
+ * type, and created with or without restored root privilege (if running
+ * with a real uid of root and an effective uid of some other user).  This
+ * us to test whether the same rights are granted using a socket with a
+ * privileged cached credential vs. a socket with a regular credential.
+ */
+#define	PRIV_ASIS	0
+#define	PRIV_GETROOT	1
+static int
+get_socket_unpriv(int type)
+{
+
+	return (socket(PF_INET, type, 0));
+}
+
+static int
+get_socket_priv(int type)
+{
+	uid_t olduid;
+	int sock;
+
+	if (getuid() != 0)
+		errx(-1, "get_sock_priv: running without real uid 0");
+	
+	olduid = geteuid();
+	if (seteuid(0) < 0)
+		err(-1, "get_sock_priv: seteuid(0)");
+
+	sock = socket(PF_INET, type, 0);
+
+	if (seteuid(olduid) < 0)
+		err(-1, "get_sock_priv: seteuid(%d)", olduid);
+
+	return (sock);
+}
+
+static int
+get_socket(int type, int priv)
+{
+
+	if (priv)
+		return (get_socket_priv(type));
+	else
+		return (get_socket_unpriv(type));
+}
+
+union sockunion {
+	struct sockaddr_storage	ss;
+	struct sockaddr		sa;
+	struct sockaddr_dl	sdl;
+};
+typedef union sockunion sockunion_t;
+
+static void
+test_ether_multi(int sock)
+{
+	struct ifreq ifr;
+	struct sockaddr_dl *dlp;
+	struct ether_addr ea;
+	struct ifmaddrs *ifma, *ifmap;
+	int found;
+
+	/* Choose an 802 multicast address. */
+	if (dorandom) {
+		uint32_t mac4;
+
+		srandomdev();
+		mac4 = random();
+		ea.octet[0] = 0x01;
+		ea.octet[1] = 0x80;
+		ea.octet[2] = ((mac4 >> 24 & 0xFF));
+		ea.octet[3] = ((mac4 >> 16 & 0xFF));
+		ea.octet[4] = ((mac4 >> 8 & 0xFF));
+		ea.octet[5] = (mac4 & 0xFF);
+	} else {
+		struct ether_addr *nep = ether_aton("01:80:DE:FA:CA:7E");
+		ea = *nep;
+	}
+
+	/* Fill out ifreq, and fill out 802 group address. */
+	memset(&ifr, 0, sizeof(struct ifreq));
+	strlcpy(&ifr.ifr_name[0], ifname, IFNAMSIZ);
+	dlp = (struct sockaddr_dl *)&ifr.ifr_addr;
+	memset(dlp, 0, sizeof(struct sockaddr_dl));
+	dlp->sdl_len = sizeof(struct sockaddr_dl);
+	dlp->sdl_family = AF_LINK;
+	dlp->sdl_alen = sizeof(struct ether_addr);
+	memcpy(LLADDR(dlp), &ea, sizeof(struct ether_addr));
+
+	/* Join an 802 group. */
+	if (ioctl(sock, SIOCADDMULTI, &ifr) < 0) {
+		warn("can't add ethernet multicast membership");
+		return;
+	}
+
+	/* Check that we joined the group by calling getifmaddrs(). */
+	found = 0;
+	if (getifmaddrs(&ifmap) != 0) {
+		warn("getifmaddrs()");
+	} else {
+		for (ifma = ifmap; ifma; ifma = ifma->ifma_next) {
+			sockunion_t *psa = (sockunion_t *)ifma->ifma_addr;
+			if (ifma->ifma_name == NULL || psa == NULL)
+				continue;
+
+			if (psa->sa.sa_family != AF_LINK ||
+			    psa->sdl.sdl_alen != ETHER_ADDR_LEN)
+				continue;
+
+			if (bcmp(LLADDR(&psa->sdl), LLADDR(dlp),
+			    ETHER_ADDR_LEN) == 0) {
+				found = 1;
+				break;
+			}
+		}
+		freeifmaddrs(ifmap);
+	}
+	if (!found) {
+		warnx("group membership for %s not returned by getifmaddrs()",
+		   ether_ntoa(&ea));
+	}
+
+	/* Fill out ifreq, and fill out 802 group address. */
+	memset(&ifr, 0, sizeof(struct ifreq));
+	strlcpy(&ifr.ifr_name[0], ifname, IFNAMSIZ);
+	dlp = (struct sockaddr_dl *)&ifr.ifr_addr;
+	memset(dlp, 0, sizeof(struct sockaddr_dl));
+	dlp->sdl_len = sizeof(struct sockaddr_dl);
+	dlp->sdl_family = AF_LINK;
+	dlp->sdl_alen = sizeof(struct ether_addr);
+	memcpy(LLADDR(dlp), &ea, sizeof(struct ether_addr));
+
+	/* Leave an 802 group. */
+	if (ioctl(sock, SIOCDELMULTI, &ifr) < 0)
+		warn("can't delete ethernet multicast membership");
+
+}
+
+static void
+testsuite(int priv)
+{
+	int sock;
+
+	sock = get_socket(SOCK_DGRAM, 0);
+	if (sock == -1)
+		err(-1, "get_socket(SOCK_DGRAM) for test_ether_multi()", priv);
+	test_ether_multi(sock);
+	close(sock);
+}
+
+static void
+usage()
+{
+
+	fprintf(stderr, "usage: ethermulti -i ifname [-r] [-v]\n");
+	exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char *argv[])
+{
+	int ch;
+
+	while ((ch = getopt(argc, argv, "i:rv")) != -1) {
+		switch (ch) {
+		case 'i':
+			ifname = optarg;
+			break;
+		case 'r':
+			dorandom = 1;	/* introduce non-determinism */
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		default:
+			usage();
+		}
+	}
+	if (ifname == NULL)
+		usage();
+
+	printf("1..1\n");
+	if (geteuid() != 0) {
+		errx(1, "Not running as root, can't run tests as non-root");
+		/*NOTREACHED*/
+	} else {
+		fprintf(stderr,
+		    "Running tests with ruid %d euid %d sock uid 0\n",
+		    getuid(), geteuid());
+		testsuite(PRIV_ASIS);
+	}
+	printf("ok 1 - ethermulti\n");
+	exit(0);
+}