Nagy Karoly Gabriel
14 years ago
committed by
Alejandro Mery
4 changed files with 6 additions and 252 deletions
@ -1,228 +0,0 @@
|
||||
# --- SDE-COPYRIGHT-NOTE-BEGIN ---
|
||||
# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
|
||||
#
|
||||
# Filename: package/.../dhcp/dhcp-3.0+paranoia.patch
|
||||
# Copyright (C) 2004 - 2006 The T2 SDE Project
|
||||
# Copyright (C) 1998 - 2003 Clifford Wolf
|
||||
#
|
||||
# More information can be found in the files COPYING and README.
|
||||
#
|
||||
# This patch file is dual-licensed. It is available under the license the
|
||||
# patched project is licensed under, as long as it is an OpenSource license
|
||||
# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
|
||||
# of the GNU General Public License as published by the Free Software
|
||||
# Foundation; either version 2 of the License, or (at your option) any later
|
||||
# version.
|
||||
# --- SDE-COPYRIGHT-NOTE-END ---
|
||||
|
||||
borrowed from ari edelkind's site
|
||||
http://www.episec.com/people/edelkind/patches/dhcp/dhcp-3.0+paranoia.patch
|
||||
|
||||
---
|
||||
|
||||
paranoia (non-root/chroot) patch for ISC dhcp 3.0
|
||||
file to patch: dhcp-3.0/server/dhcpd.c
|
||||
|
||||
update from paranoia patch for ISC dhcp 2.0
|
||||
|
||||
Adds 3 options:
|
||||
|
||||
-user <user>
|
||||
-group <group>
|
||||
-chroot <chroot_dir>
|
||||
|
||||
Notes:
|
||||
-DPARANOIA must be passed as an argument to the --copts option
|
||||
of configure. Otherwise, the paranoia code will not be compiled
|
||||
in. Example: ./configure --copts -DPARANOIA
|
||||
|
||||
The chroot() call has been delayed in order to allow /dev/log to
|
||||
be reopened after the configuration file has been read. This is
|
||||
beneficial for systems on which /dev/log is a unix domain socket.
|
||||
The main side effect is that dhcpd.conf should be placed in /etc,
|
||||
instead of <chroot_dir>/etc.
|
||||
|
||||
If dhcpd is to be run on a sysV-style architecture (or, more
|
||||
generally, if /dev/log is a character device), one may opt to
|
||||
create the <chroot_dir>/dev/log character device and add
|
||||
-DEARLY_CHROOT to the --copts option of configure (in addition to
|
||||
-DPARANOIA). This will perform the chroot() call at the earliest
|
||||
convenience (before reading the configuration file).
|
||||
|
||||
If the -user option is used, the lease and pid file directories
|
||||
should be writable to the server process after it drops
|
||||
privileges.
|
||||
|
||||
|
||||
ari edelkind (12/10/2001)
|
||||
last modified 12/10/2001
|
||||
|
||||
|
||||
--- dhcp-3.0/server/dhcpd.c Thu Jun 21 22:12:58 2001
|
||||
+++ dhcp-3.0+paranoia/server/dhcpd.c Wed Oct 17 08:23:00 2001
|
||||
@@ -56,6 +56,16 @@
|
||||
#include "version.h"
|
||||
#include <omapip/omapip_p.h>
|
||||
|
||||
+#if defined (PARANOIA)
|
||||
+# include <sys/types.h>
|
||||
+# include <unistd.h>
|
||||
+# include <pwd.h>
|
||||
+/* get around the ISC declaration of group */
|
||||
+# define group real_group
|
||||
+# include <grp.h>
|
||||
+# undef group
|
||||
+#endif /* PARANOIA */
|
||||
+
|
||||
static void usage PROTO ((void));
|
||||
|
||||
TIME cur_time;
|
||||
@@ -204,6 +214,22 @@
|
||||
omapi_object_dereference (&listener, MDL);
|
||||
}
|
||||
|
||||
+#if defined (PARANOIA)
|
||||
+/* to be used in one of two possible scenarios */
|
||||
+static void setup_chroot (char *chroot_dir) {
|
||||
+ if (geteuid())
|
||||
+ log_fatal ("you must be root to use chroot");
|
||||
+
|
||||
+ if (chroot(chroot_dir)) {
|
||||
+ log_fatal ("chroot(\"%s\"): %m", chroot_dir);
|
||||
+ }
|
||||
+ if (chdir ("/")) {
|
||||
+ /* probably permission denied */
|
||||
+ log_fatal ("chdir(\"/\"): %m");
|
||||
+ }
|
||||
+}
|
||||
+#endif /* PARANOIA */
|
||||
+
|
||||
int main (argc, argv, envp)
|
||||
int argc;
|
||||
char **argv, **envp;
|
||||
@@ -236,6 +262,14 @@
|
||||
char *traceinfile = (char *)0;
|
||||
char *traceoutfile = (char *)0;
|
||||
#endif
|
||||
+#if defined (PARANOIA)
|
||||
+ char *set_user = 0;
|
||||
+ char *set_group = 0;
|
||||
+ char *set_chroot = 0;
|
||||
+
|
||||
+ uid_t set_uid = 0;
|
||||
+ gid_t set_gid = 0;
|
||||
+#endif /* PARANOIA */
|
||||
|
||||
/* Make sure we have stdin, stdout and stderr. */
|
||||
status = open ("/dev/null", O_RDWR);
|
||||
@@ -298,6 +332,20 @@
|
||||
if (++i == argc)
|
||||
usage ();
|
||||
server = argv [i];
|
||||
+#if defined (PARANOIA)
|
||||
+ } else if (!strcmp (argv [i], "-user")) {
|
||||
+ if (++i == argc)
|
||||
+ usage ();
|
||||
+ set_user = argv [i];
|
||||
+ } else if (!strcmp (argv [i], "-group")) {
|
||||
+ if (++i == argc)
|
||||
+ usage ();
|
||||
+ set_group = argv [i];
|
||||
+ } else if (!strcmp (argv [i], "-chroot")) {
|
||||
+ if (++i == argc)
|
||||
+ usage ();
|
||||
+ set_chroot = argv [i];
|
||||
+#endif /* PARANOIA */
|
||||
} else if (!strcmp (argv [i], "-cf")) {
|
||||
if (++i == argc)
|
||||
usage ();
|
||||
@@ -397,6 +445,44 @@
|
||||
trace_seed_stop, MDL);
|
||||
#endif
|
||||
|
||||
+#if defined (PARANOIA)
|
||||
+ /* get user and group info if those options were given */
|
||||
+ if (set_user) {
|
||||
+ struct passwd *tmp_pwd;
|
||||
+
|
||||
+ if (geteuid())
|
||||
+ log_fatal ("you must be root to set user");
|
||||
+
|
||||
+ if (!(tmp_pwd = getpwnam(set_user)))
|
||||
+ log_fatal ("no such user: %s", set_user);
|
||||
+
|
||||
+ set_uid = tmp_pwd->pw_uid;
|
||||
+
|
||||
+ /* use the user's group as the default gid */
|
||||
+ if (!set_group)
|
||||
+ set_gid = tmp_pwd->pw_gid;
|
||||
+ }
|
||||
+
|
||||
+ if (set_group) {
|
||||
+/* get around the ISC declaration of group */
|
||||
+#define group real_group
|
||||
+ struct group *tmp_grp;
|
||||
+
|
||||
+ if (geteuid())
|
||||
+ log_fatal ("you must be root to set group");
|
||||
+
|
||||
+ if (!(tmp_grp = getgrnam(set_group)))
|
||||
+ log_fatal ("no such group: %s", set_group);
|
||||
+
|
||||
+ set_gid = tmp_grp->gr_gid;
|
||||
+#undef group
|
||||
+ }
|
||||
+
|
||||
+# if defined (EARLY_CHROOT)
|
||||
+ if (set_chroot) setup_chroot (set_chroot);
|
||||
+# endif /* EARLY_CHROOT */
|
||||
+#endif /* PARANOIA */
|
||||
+
|
||||
/* Default to the DHCP/BOOTP port. */
|
||||
if (!local_port)
|
||||
{
|
||||
@@ -500,6 +586,10 @@
|
||||
|
||||
postconf_initialization (quiet);
|
||||
|
||||
+#if defined (PARANOIA) && !defined (EARLY_CHROOT)
|
||||
+ if (set_chroot) setup_chroot (set_chroot);
|
||||
+#endif /* PARANOIA && !EARLY_CHROOT */
|
||||
+
|
||||
/* test option should cause an early exit */
|
||||
if (cftest && !lftest)
|
||||
exit(0);
|
||||
@@ -543,6 +633,22 @@
|
||||
exit (0);
|
||||
}
|
||||
|
||||
+#if defined (PARANOIA)
|
||||
+ /* change uid to the specified one */
|
||||
+
|
||||
+ if (set_gid) {
|
||||
+ if (setgroups (0, (void *)0))
|
||||
+ log_fatal ("setgroups: %m");
|
||||
+ if (setgid (set_gid))
|
||||
+ log_fatal ("setgid(%d): %m", (int) set_gid);
|
||||
+ }
|
||||
+
|
||||
+ if (set_uid) {
|
||||
+ if (setuid (set_uid))
|
||||
+ log_fatal ("setuid(%d): %m", (int) set_uid);
|
||||
+ }
|
||||
+#endif /* PARANOIA */
|
||||
+
|
||||
/* Read previous pid file. */
|
||||
if ((i = open (path_dhcpd_pid, O_RDONLY)) >= 0) {
|
||||
status = read (i, pbuf, (sizeof pbuf) - 1);
|
||||
@@ -888,6 +994,10 @@
|
||||
|
||||
log_fatal ("Usage: dhcpd [-p <UDP port #>] [-d] [-f]%s%s%s%s",
|
||||
"\n [-cf config-file] [-lf lease-file]",
|
||||
+#if defined (PARANOIA)
|
||||
+ /* meld into the following string */
|
||||
+ "\n [-user user] [-group group] [-chroot dir]"
|
||||
+#endif /* PARANOIA */
|
||||
#if defined (TRACING)
|
||||
"\n [-tf trace-output-file]",
|
||||
"\n [-play trace-input-file]",
|
||||
Loading…
Reference in new issue