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