214 lines
6.4 KiB
C
214 lines
6.4 KiB
C
/*
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* Check decoding of getsockopt and setsockopt for SOL_NETLINK level.
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*
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* Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org>
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include "netlink.h"
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#include <stdio.h>
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#ifndef SOL_NETLINK
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# define SOL_NETLINK 270
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#endif
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static int rc;
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static const char *errstr;
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static int
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get_sockopt(int fd, int name, void *val, socklen_t *len)
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{
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rc = getsockopt(fd, SOL_NETLINK, name, val, len);
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errstr = sprintrc(rc);
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return rc;
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}
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static int
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set_sockopt(int fd, int name, void *val, socklen_t len)
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{
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rc = setsockopt(fd, SOL_NETLINK, name, val, len);
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errstr = sprintrc(rc);
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return rc;
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}
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int
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main(void)
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{
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static const struct {
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int val;
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const char *str;
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} names[] = {
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#ifdef NETLINK_ADD_MEMBERSHIP
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{ ARG_STR(NETLINK_ADD_MEMBERSHIP) },
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#endif
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#ifdef NETLINK_DROP_MEMBERSHIP
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{ ARG_STR(NETLINK_DROP_MEMBERSHIP) },
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#endif
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#ifdef NETLINK_PKTINFO
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{ ARG_STR(NETLINK_PKTINFO) },
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#endif
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#ifdef NETLINK_BROADCAST_ERROR
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{ ARG_STR(NETLINK_BROADCAST_ERROR) },
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#endif
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#ifdef NETLINK_NO_ENOBUFS
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{ ARG_STR(NETLINK_NO_ENOBUFS) },
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#endif
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#ifdef NETLINK_RX_RING
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{ ARG_STR(NETLINK_RX_RING) },
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#endif
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#ifdef NETLINK_TX_RING
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{ ARG_STR(NETLINK_TX_RING) },
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#endif
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#ifdef NETLINK_LISTEN_ALL_NSID
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{ ARG_STR(NETLINK_LISTEN_ALL_NSID) },
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#endif
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#ifdef NETLINK_LIST_MEMBERSHIPS
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{ ARG_STR(NETLINK_LIST_MEMBERSHIPS) },
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#endif
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#ifdef NETLINK_CAP_ACK
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{ ARG_STR(NETLINK_CAP_ACK) },
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#endif
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#ifdef NETLINK_EXT_ACK
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{ ARG_STR(NETLINK_EXT_ACK) },
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#endif
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};
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TAIL_ALLOC_OBJECT_CONST_PTR(int, val);
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TAIL_ALLOC_OBJECT_CONST_PTR(socklen_t, len);
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void *const efault = val + 1;
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int fd = socket(AF_NETLINK, SOCK_RAW, 0);
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if (fd < 0)
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perror_msg_and_skip("socket AF_NETLINK SOCK_RAW");
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(names); ++i) {
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/* getsockopt */
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/* classic */
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*len = sizeof(*val);
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get_sockopt(fd, names[i].val, val, len);
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printf("getsockopt(%d, SOL_NETLINK, %s, ", fd, names[i].str);
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if (rc)
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printf("%p", val);
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else
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printf("[%d]", *val);
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printf(", [%d]) = %s\n", *len, errstr);
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/* optlen larger than necessary - shortened */
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*len = sizeof(*val) + 1;
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get_sockopt(fd, names[i].val, val, len);
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printf("getsockopt(%d, SOL_NETLINK, %s, ", fd, names[i].str);
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if (rc)
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printf("%p", val);
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else
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printf("[%d]", *val);
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printf(", [%d", (int) sizeof(*val) + 1);
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if ((int) sizeof(*val) + 1 != *len)
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printf("->%d", *len);
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printf("]) = %s\n", errstr);
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/* zero optlen - print returned optlen */
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*len = 0;
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get_sockopt(fd, names[i].val, NULL, len);
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printf("getsockopt(%d, SOL_NETLINK, %s, NULL, [0",
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fd, names[i].str);
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if (*len)
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printf("->%d", *len);
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printf("]) = %s\n", errstr);
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#ifdef NETLINK_LIST_MEMBERSHIPS
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if (names[i].val != NETLINK_LIST_MEMBERSHIPS) {
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#endif
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/* optlen shorter than necessary - print address */
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*len = sizeof(*val) - 1;
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get_sockopt(fd, names[i].val, val, len);
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printf("getsockopt(%d, SOL_NETLINK, %s, %p, [%d",
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fd, names[i].str, val, (int) sizeof(*val) - 1);
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if ((int) sizeof(*val) - 1 != *len)
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printf("->%d", *len);
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printf("]) = %s\n", errstr);
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#ifdef NETLINK_LIST_MEMBERSHIPS
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} else {
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/* optlen shorter than required for the first element */
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*len = sizeof(*val) - 1;
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get_sockopt(fd, names[i].val, efault, len);
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printf("getsockopt(%d, SOL_NETLINK, %s, ",
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fd, names[i].str);
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if (rc)
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printf("%p", efault);
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else
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printf("[]");
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printf(", [%d", (int) sizeof(*val) - 1);
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if ((int) sizeof(*val) - 1 != *len)
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printf("->%d", *len);
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printf("]) = %s\n", errstr);
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}
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#endif
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/* optval EFAULT - print address */
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*len = sizeof(*val);
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get_sockopt(fd, names[i].val, efault, len);
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printf("getsockopt(%d, SOL_NETLINK, %s, %p, [%d]) = %s\n",
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fd, names[i].str, efault, *len, errstr);
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/* optlen EFAULT - print address */
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get_sockopt(fd, names[i].val, val, len + 1);
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printf("getsockopt(%d, SOL_NETLINK, %s, %p, %p) = %s\n",
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fd, names[i].str, val, len + 1, errstr);
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/* setsockopt */
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/* classic */
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*val = 0xdefaced;
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set_sockopt(fd, names[i].val, val, sizeof(*val));
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printf("setsockopt(%d, SOL_NETLINK, %s, [%d], %d) = %s\n",
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fd, names[i].str, *val, (int) sizeof(*val), errstr);
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/* optlen larger than necessary - shortened */
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set_sockopt(fd, names[i].val, val, sizeof(*val) + 1);
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printf("setsockopt(%d, SOL_NETLINK, %s, [%d], %d) = %s\n",
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fd, names[i].str, *val, (int) sizeof(*val) + 1, errstr);
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/* optlen < 0 - print address */
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set_sockopt(fd, names[i].val, val, -1U);
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printf("setsockopt(%d, SOL_NETLINK, %s, %p, -1) = %s\n",
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fd, names[i].str, val, errstr);
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/* optlen smaller than necessary - print address */
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set_sockopt(fd, names[i].val, val, sizeof(*val) - 1);
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printf("setsockopt(%d, SOL_NETLINK, %s, %p, %d) = %s\n",
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fd, names[i].str, val, (int) sizeof(*val) - 1, errstr);
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/* optval EFAULT - print address */
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set_sockopt(fd, names[i].val, efault, sizeof(*val));
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printf("setsockopt(%d, SOL_NETLINK, %s, %p, %d) = %s\n",
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fd, names[i].str, efault, (int) sizeof(*val), errstr);
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}
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puts("+++ exited with 0 +++");
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return 0;
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}
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