1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2011 James Gritton. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/param.h> 30#include <sys/types.h> 31#include <sys/jail.h> 32#include <sys/queue.h> 33#include <sys/time.h> 34 35#include <jail.h> 36#include <stdio.h> 37 38#define CONF_FILE "/etc/jail.conf" 39 40#define DEP_FROM 0 41#define DEP_TO 1 42 43#define DF_SEEN 0x01 /* Dependency has been followed */ 44#define DF_LIGHT 0x02 /* Implied dependency on jail existence only */ 45#define DF_NOFAIL 0x04 /* Don't propagate failed jails */ 46 47#define PF_VAR 0x0001 /* This is a variable, not a true parameter */ 48#define PF_APPEND 0x0002 /* Append to existing parameter list */ 49#define PF_BAD 0x0004 /* Unable to resolve parameter value */ 50#define PF_INTERNAL 0x0008 /* Internal parameter, not passed to kernel */ 51#define PF_BOOL 0x0010 /* Boolean parameter */ 52#define PF_INT 0x0020 /* Integer parameter */ 53#define PF_CONV 0x0040 /* Parameter duplicated in converted form */ 54#define PF_REV 0x0080 /* Run commands in reverse order on stopping */ 55#define PF_IMMUTABLE 0x0100 /* Immutable parameter */ 56#define PF_NAMEVAL 0x0200 /* Parameter is in "name value" form */ 57 58#define JF_START 0x0001 /* -c */ 59#define JF_SET 0x0002 /* -m */ 60#define JF_STOP 0x0004 /* -r */ 61#define JF_DEPEND 0x0008 /* Operation required by dependency */ 62#define JF_WILD 0x0010 /* Not specified on the command line */ 63#define JF_FAILED 0x0020 /* Operation failed */ 64#define JF_PARAMS 0x0040 /* Parameters checked and imported */ 65#define JF_RDTUN 0x0080 /* Create-only parameter check has been done */ 66#define JF_PERSIST 0x0100 /* Jail is temporarily persistent */ 67#define JF_TIMEOUT 0x0200 /* A command (or process kill) timed out */ 68#define JF_SLEEPQ 0x0400 /* Waiting on a command and/or timeout */ 69#define JF_FROM_RUNQ 0x0800 /* Has already been on the run queue */ 70#define JF_CLEANUP 0x1000 /* -C Run post-removal commands */ 71 72#define JF_OP_MASK (JF_START | JF_SET | JF_STOP) 73#define JF_RESTART (JF_START | JF_STOP) 74#define JF_START_SET (JF_START | JF_SET) 75#define JF_SET_RESTART (JF_SET | JF_STOP) 76#define JF_START_SET_RESTART (JF_START | JF_SET | JF_STOP) 77#define JF_DO_STOP(js) (((js) & (JF_SET | JF_STOP)) == JF_STOP) 78 79enum intparam { 80 IP__NULL = 0, /* Null command */ 81 IP_ALLOW_DYING, /* Allow making changes to a dying jail */ 82 IP_COMMAND, /* Command run inside jail at creation */ 83 IP_DEPEND, /* Jail starts after (stops before) another */ 84 IP_EXEC_CLEAN, /* Run commands in a clean environment */ 85 IP_EXEC_CONSOLELOG, /* Redirect optput for commands run in jail */ 86 IP_EXEC_FIB, /* Run jailed commands with this FIB */ 87 IP_EXEC_JAIL_USER, /* Run jailed commands as this user */ 88 IP_EXEC_POSTSTART, /* Commands run outside jail after creating */ 89 IP_EXEC_POSTSTOP, /* Commands run outside jail after removing */ 90 IP_EXEC_PREPARE, /* Commands run outside jail before addrs and mounting */ 91 IP_EXEC_PRESTART, /* Commands run outside jail before creating */ 92 IP_EXEC_PRESTOP, /* Commands run outside jail before removing */ 93 IP_EXEC_RELEASE, /* Commands run outside jail after addrs and unmounted */ 94 IP_EXEC_CREATED, /* Commands run outside jail right after it was started */ 95 IP_EXEC_START, /* Commands run inside jail on creation */ 96 IP_EXEC_STOP, /* Commands run inside jail on removal */ 97 IP_EXEC_SYSTEM_JAIL_USER,/* Get jail_user from system passwd file */ 98 IP_EXEC_SYSTEM_USER, /* Run non-jailed commands as this user */ 99 IP_EXEC_TIMEOUT, /* Time to wait for a command to complete */ 100#if defined(INET) || defined(INET6) 101 IP_INTERFACE, /* Add IP addresses to this interface */ 102 IP_IP_HOSTNAME, /* Get jail IP address(es) from hostname */ 103#endif 104 IP_MOUNT, /* Mount points in fstab(5) form */ 105 IP_MOUNT_DEVFS, /* Mount /dev under prison root */ 106 IP_MOUNT_FDESCFS, /* Mount /dev/fd under prison root */ 107 IP_MOUNT_PROCFS, /* Mount /proc under prison root */ 108 IP_MOUNT_FSTAB, /* A standard fstab(5) file */ 109 IP_STOP_TIMEOUT, /* Time to wait after sending SIGTERM */ 110 IP_VNET_INTERFACE, /* Assign interface(s) to vnet jail */ 111 IP_ZFS_DATASET, /* Jail ZFS datasets */ 112#ifdef INET 113 IP__IP4_IFADDR, /* Copy of ip4.addr with interface/netmask */ 114#endif 115#ifdef INET6 116 IP__IP6_IFADDR, /* Copy of ip6.addr with interface/prefixlen */ 117#endif 118 IP__MOUNT_FROM_FSTAB, /* Line from mount.fstab file */ 119 IP__OP, /* Placeholder for requested operation */ 120 KP_ALLOW_CHFLAGS, 121 KP_ALLOW_MOUNT, 122 KP_ALLOW_RAW_SOCKETS, 123 KP_ALLOW_SET_HOSTNAME, 124 KP_ALLOW_SOCKET_AF, 125 KP_ALLOW_SYSVIPC, 126 KP_DEVFS_RULESET, 127 KP_HOST_HOSTNAME, 128#ifdef INET 129 KP_IP4_ADDR, 130#endif 131#ifdef INET6 132 KP_IP6_ADDR, 133#endif 134 KP_JID, 135 KP_NAME, 136 KP_PATH, 137 KP_PERSIST, 138 KP_SECURELEVEL, 139 KP_VNET, 140 IP_NPARAM 141}; 142 143STAILQ_HEAD(cfvars, cfvar); 144 145struct cfvar { 146 STAILQ_ENTRY(cfvar) tq; 147 char *name; 148 size_t pos; 149}; 150 151TAILQ_HEAD(cfstrings, cfstring); 152 153struct cfstring { 154 TAILQ_ENTRY(cfstring) tq; 155 char *s; 156 size_t len; 157 struct cfvars vars; 158}; 159 160TAILQ_HEAD(cfparams, cfparam); 161 162struct cfparam { 163 TAILQ_ENTRY(cfparam) tq; 164 char *name; 165 struct cfstrings val; 166 unsigned flags; 167 int gen; 168}; 169 170TAILQ_HEAD(cfjails, cfjail); 171STAILQ_HEAD(cfdepends, cfdepend); 172 173struct cfjail { 174 TAILQ_ENTRY(cfjail) tq; 175 char *name; 176 char *comline; 177 struct cfparams params; 178 struct cfdepends dep[2]; 179 struct cfjails *queue; 180 struct cfjail *cfparent; 181 struct cfparam *intparams[IP_NPARAM]; 182 struct cfstring *comstring; 183 struct jailparam *jp; 184 struct timespec timeout; 185 const enum intparam *comparam; 186 unsigned flags; 187 int jid; 188 int seq; 189 int pstatus; 190 int ndeps; 191 int njp; 192 int nprocs; 193}; 194 195struct cfdepend { 196 STAILQ_ENTRY(cfdepend) tq[2]; 197 struct cfjail *j[2]; 198 unsigned flags; 199}; 200 201struct cflex { 202 const char *cfname; 203 int error; 204}; 205 206extern void *emalloc(size_t); 207extern void *erealloc(void *, size_t); 208extern char *estrdup(const char *); 209extern int create_jail(struct cfjail *j); 210extern void failed(struct cfjail *j); 211extern void jail_note(const struct cfjail *j, const char *fmt, ...); 212extern void jail_warnx(const struct cfjail *j, const char *fmt, ...); 213 214extern int next_command(struct cfjail *j); 215extern int finish_command(struct cfjail *j); 216extern struct cfjail *next_proc(int nonblock); 217 218extern void load_config(const char *cfname); 219extern void include_config(void *scanner, const char *cfname); 220extern struct cfjail *add_jail(void); 221extern void add_param(struct cfjail *j, const struct cfparam *p, 222 enum intparam ipnum, const char *value); 223extern int bool_param(const struct cfparam *p); 224extern int int_param(const struct cfparam *p, int *ip); 225extern const char *string_param(const struct cfparam *p); 226extern int check_intparams(struct cfjail *j); 227extern int import_params(struct cfjail *j); 228extern int equalopts(const char *opt1, const char *opt2); 229extern int wild_jail_name(const char *wname); 230extern int wild_jail_match(const char *jname, const char *wname); 231extern void free_param_strings(struct cfparam *p); 232 233extern void dep_setup(int docf); 234extern int dep_check(struct cfjail *j); 235extern void dep_done(struct cfjail *j, unsigned flags); 236extern void dep_reset(struct cfjail *j); 237extern struct cfjail *next_jail(void); 238extern int start_state(const char *target, int docf, unsigned state, 239 int running); 240extern void requeue(struct cfjail *j, struct cfjails *queue); 241extern void requeue_head(struct cfjail *j, struct cfjails *queue); 242 243extern struct cflex *yyget_extra(void *scanner); 244extern FILE *yyget_in(void *scanner); 245extern int yyget_lineno(void *scanner); 246extern char *yyget_text(void *scanner); 247 248extern struct cfjails cfjails; 249extern struct cfjails ready; 250extern struct cfjails depend; 251extern int iflag; 252extern int note_remove; 253extern int paralimit; 254extern int verbose; 255