/*-
* 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>
#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);
}
