0f1fe22db5
outside the prison_states array. When checking if there is a name configured for the prison, check the first character to not be '\0' instead of checking if the char array is present, which it always is. Note, that this is different for the *jailname in the syscall. Found with: Coverity Prevent(tm) CID: 4156, 4155 MFC after: 4 weeks (just that I get the mail)
244 lines
6.1 KiB
C
244 lines
6.1 KiB
C
/*-
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* Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
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* Copyright (c) 2008 Bjoern A. Zeeb <bz@FreeBSD.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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*
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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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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/jail.h>
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#include <sys/sysctl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <err.h>
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#include <errno.h>
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#include <limits.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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#define FLAG_A 0x00001
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#define FLAG_V 0x00002
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#ifdef SUPPORT_OLD_XPRISON
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static
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char *print_xprison_v1(void *p, char *end)
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{
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struct xprison_v1 *xp;
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struct in_addr in;
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if ((char *)p + sizeof(struct xprison_v1) > end)
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errx(1, "Invalid length for jail");
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xp = (struct xprison_v1 *)p;
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printf("%6d %-29.29s %.74s\n",
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xp->pr_id, xp->pr_host, xp->pr_path);
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/* We are not printing an empty line here for state and name. */
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/* We are not printing an empty line here for cpusetid. */
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/* IPv4 address. */
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in.s_addr = htonl(xp->pr_ip);
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printf("%6s %-15.15s\n", "", inet_ntoa(in));
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return ((char *)(xp + 1));
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}
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#endif
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static
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char *print_xprison_v3(void *p, char *end, unsigned flags)
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{
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struct xprison *xp;
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struct in_addr *iap, in;
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struct in6_addr *ia6p;
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char buf[INET6_ADDRSTRLEN];
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const char *state;
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char *q;
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uint32_t i;
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if ((char *)p + sizeof(struct xprison) > end)
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errx(1, "Invalid length for jail");
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xp = (struct xprison *)p;
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if (xp->pr_state < 0 || xp->pr_state >= (int)
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((sizeof(prison_states) / sizeof(struct prison_state))))
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state = "(bogus)";
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else
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state = prison_states[xp->pr_state].state_name;
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/* See if we should print non-ACTIVE jails. No? */
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if ((flags & FLAG_A) == 0 && strcmp(state, "ALIVE")) {
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q = (char *)(xp + 1);
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q += (xp->pr_ip4s * sizeof(struct in_addr));
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if (q > end)
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errx(1, "Invalid length for jail");
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q += (xp->pr_ip6s * sizeof(struct in6_addr));
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if (q > end)
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errx(1, "Invalid length for jail");
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return (q);
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}
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printf("%6d %-29.29s %.74s\n",
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xp->pr_id, xp->pr_host, xp->pr_path);
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/* Jail state and name. */
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if (flags & FLAG_V)
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printf("%6s %-29.29s %.74s\n",
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"", (xp->pr_name[0] != '\0') ? xp->pr_name : "", state);
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/* cpusetid. */
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if (flags & FLAG_V)
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printf("%6s %-6d\n",
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"", xp->pr_cpusetid);
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q = (char *)(xp + 1);
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/* IPv4 addresses. */
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iap = (struct in_addr *)(void *)q;
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q += (xp->pr_ip4s * sizeof(struct in_addr));
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if (q > end)
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errx(1, "Invalid length for jail");
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for (i = 0; i < xp->pr_ip4s; i++) {
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if (i == 0 || flags & FLAG_V) {
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in.s_addr = iap[i].s_addr;
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printf("%6s %-15.15s\n", "", inet_ntoa(in));
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}
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}
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/* IPv6 addresses. */
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ia6p = (struct in6_addr *)(void *)q;
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q += (xp->pr_ip6s * sizeof(struct in6_addr));
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if (q > end)
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errx(1, "Invalid length for jail");
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for (i = 0; i < xp->pr_ip6s; i++) {
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if (flags & FLAG_V) {
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inet_ntop(AF_INET6, &ia6p[i], buf, sizeof(buf));
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printf("%6s %s\n", "", buf);
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}
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}
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return (q);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: jls [-av]\n");
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exit(1);
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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, version;
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unsigned flags;
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size_t i, j, len;
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void *p, *q;
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flags = 0;
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while ((ch = getopt(argc, argv, "av")) != -1) {
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switch (ch) {
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case 'a':
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flags |= FLAG_A;
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break;
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case 'v':
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flags |= FLAG_V;
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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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argc -= optind;
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argv += optind;
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if (sysctlbyname("security.jail.list", NULL, &len, NULL, 0) == -1)
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err(1, "sysctlbyname(): security.jail.list");
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j = len;
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for (i = 0; i < 4; i++) {
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if (len <= 0)
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exit(0);
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p = q = malloc(len);
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if (p == NULL)
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err(1, "malloc()");
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if (sysctlbyname("security.jail.list", q, &len, NULL, 0) == -1) {
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if (errno == ENOMEM) {
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free(p);
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p = NULL;
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len += j;
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continue;
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}
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err(1, "sysctlbyname(): security.jail.list");
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}
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break;
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}
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if (p == NULL)
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err(1, "sysctlbyname(): security.jail.list");
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if (len < sizeof(int))
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errx(1, "This is no prison. Kernel and userland out of sync?");
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version = *(int *)p;
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if (version > XPRISON_VERSION)
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errx(1, "Sci-Fi prison. Kernel/userland out of sync?");
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printf(" JID Hostname Path\n");
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if (flags & FLAG_V) {
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printf(" Name State\n");
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printf(" CPUSetID\n");
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}
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printf(" IP Address(es)\n");
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for (; q != NULL && (char *)q + sizeof(int) < (char *)p + len;) {
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version = *(int *)q;
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if (version > XPRISON_VERSION)
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errx(1, "Sci-Fi prison. Kernel/userland out of sync?");
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switch (version) {
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#ifdef SUPPORT_OLD_XPRISON
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case 1:
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q = print_xprison_v1(q, (char *)p + len);
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break;
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case 2:
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errx(1, "Version 2 was used by multi-IPv4 jail "
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"implementations that never made it into the "
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"official kernel.");
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/* NOTREACHED */
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break;
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#endif
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case 3:
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q = print_xprison_v3(q, (char *)p + len, flags);
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break;
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default:
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errx(1, "Prison unknown. Kernel/userland out of sync?");
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/* NOTREACHED */
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break;
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}
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}
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free(p);
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exit(0);
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}
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