/*- * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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); }