1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/types.h> 33 #include <sys/jail.h> 34 #include <sys/queue.h> 35 #include <sys/time.h> 36 37 #include <jail.h> 38 39 #define CONF_FILE "/etc/jail.conf" 40 41 #define DEP_FROM 0 42 #define DEP_TO 1 43 44 #define DF_SEEN 0x01 /* Dependency has been followed */ 45 #define DF_LIGHT 0x02 /* Implied dependency on jail existence only */ 46 #define DF_NOFAIL 0x04 /* Don't propagate failed jails */ 47 48 #define PF_VAR 0x01 /* This is a variable, not a true parameter */ 49 #define PF_APPEND 0x02 /* Append to existing parameter list */ 50 #define PF_BAD 0x04 /* Unable to resolve parameter value */ 51 #define PF_INTERNAL 0x08 /* Internal parameter, not passed to kernel */ 52 #define PF_BOOL 0x10 /* Boolean parameter */ 53 #define PF_INT 0x20 /* Integer parameter */ 54 #define PF_CONV 0x40 /* Parameter duplicated in converted form */ 55 #define PF_REV 0x80 /* Run commands in reverse order on stopping */ 56 #define PF_IMMUTABLE 0x100 /* Immutable parameter */ 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_SHOW 0x1000 /* -e Exhibit list of configured jails */ 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 79 enum 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_PRESTART, /* Commands run outside jail before creating */ 91 IP_EXEC_PRESTOP, /* Commands run outside jail before removing */ 92 IP_EXEC_CREATED, /* Commands run outside jail right after it was started */ 93 IP_EXEC_START, /* Commands run inside jail on creation */ 94 IP_EXEC_STOP, /* Commands run inside jail on removal */ 95 IP_EXEC_SYSTEM_JAIL_USER,/* Get jail_user from system passwd file */ 96 IP_EXEC_SYSTEM_USER, /* Run non-jailed commands as this user */ 97 IP_EXEC_TIMEOUT, /* Time to wait for a command to complete */ 98 #if defined(INET) || defined(INET6) 99 IP_INTERFACE, /* Add IP addresses to this interface */ 100 IP_IP_HOSTNAME, /* Get jail IP address(es) from hostname */ 101 #endif 102 IP_MOUNT, /* Mount points in fstab(5) form */ 103 IP_MOUNT_DEVFS, /* Mount /dev under prison root */ 104 IP_MOUNT_FDESCFS, /* Mount /dev/fd under prison root */ 105 IP_MOUNT_PROCFS, /* Mount /proc under prison root */ 106 IP_MOUNT_FSTAB, /* A standard fstab(5) file */ 107 IP_STOP_TIMEOUT, /* Time to wait after sending SIGTERM */ 108 IP_VNET_INTERFACE, /* Assign interface(s) to vnet jail */ 109 #ifdef INET 110 IP__IP4_IFADDR, /* Copy of ip4.addr with interface/netmask */ 111 #endif 112 #ifdef INET6 113 IP__IP6_IFADDR, /* Copy of ip6.addr with interface/prefixlen */ 114 #endif 115 IP__MOUNT_FROM_FSTAB, /* Line from mount.fstab file */ 116 IP__OP, /* Placeholder for requested operation */ 117 KP_ALLOW_CHFLAGS, 118 KP_ALLOW_MOUNT, 119 KP_ALLOW_RAW_SOCKETS, 120 KP_ALLOW_SET_HOSTNAME, 121 KP_ALLOW_SOCKET_AF, 122 KP_ALLOW_SYSVIPC, 123 KP_DEVFS_RULESET, 124 KP_HOST_HOSTNAME, 125 #ifdef INET 126 KP_IP4_ADDR, 127 #endif 128 #ifdef INET6 129 KP_IP6_ADDR, 130 #endif 131 KP_JID, 132 KP_NAME, 133 KP_PATH, 134 KP_PERSIST, 135 KP_SECURELEVEL, 136 KP_VNET, 137 IP_NPARAM 138 }; 139 140 STAILQ_HEAD(cfvars, cfvar); 141 142 struct cfvar { 143 STAILQ_ENTRY(cfvar) tq; 144 char *name; 145 size_t pos; 146 }; 147 148 TAILQ_HEAD(cfstrings, cfstring); 149 150 struct cfstring { 151 TAILQ_ENTRY(cfstring) tq; 152 char *s; 153 size_t len; 154 struct cfvars vars; 155 }; 156 157 TAILQ_HEAD(cfparams, cfparam); 158 159 struct cfparam { 160 TAILQ_ENTRY(cfparam) tq; 161 char *name; 162 struct cfstrings val; 163 unsigned flags; 164 int gen; 165 }; 166 167 TAILQ_HEAD(cfjails, cfjail); 168 STAILQ_HEAD(cfdepends, cfdepend); 169 170 struct cfjail { 171 TAILQ_ENTRY(cfjail) tq; 172 char *name; 173 char *comline; 174 struct cfparams params; 175 struct cfdepends dep[2]; 176 struct cfjails *queue; 177 struct cfparam *intparams[IP_NPARAM]; 178 struct cfstring *comstring; 179 struct jailparam *jp; 180 struct timespec timeout; 181 const enum intparam *comparam; 182 unsigned flags; 183 int jid; 184 int seq; 185 int pstatus; 186 int ndeps; 187 int njp; 188 int nprocs; 189 }; 190 191 struct cfdepend { 192 STAILQ_ENTRY(cfdepend) tq[2]; 193 struct cfjail *j[2]; 194 unsigned flags; 195 }; 196 197 extern void *emalloc(size_t); 198 extern void *erealloc(void *, size_t); 199 extern char *estrdup(const char *); 200 extern int create_jail(struct cfjail *j); 201 extern void failed(struct cfjail *j); 202 extern void jail_note(const struct cfjail *j, const char *fmt, ...); 203 extern void jail_warnx(const struct cfjail *j, const char *fmt, ...); 204 205 extern int next_command(struct cfjail *j); 206 extern int finish_command(struct cfjail *j); 207 extern struct cfjail *next_proc(int nonblock); 208 209 extern void load_config(void); 210 extern struct cfjail *add_jail(void); 211 extern void add_param(struct cfjail *j, const struct cfparam *p, 212 enum intparam ipnum, const char *value); 213 extern int bool_param(const struct cfparam *p); 214 extern int int_param(const struct cfparam *p, int *ip); 215 extern const char *string_param(const struct cfparam *p); 216 extern int check_intparams(struct cfjail *j); 217 extern int import_params(struct cfjail *j); 218 extern int equalopts(const char *opt1, const char *opt2); 219 extern int wild_jail_name(const char *wname); 220 extern int wild_jail_match(const char *jname, const char *wname); 221 222 extern void dep_setup(int docf); 223 extern int dep_check(struct cfjail *j); 224 extern void dep_done(struct cfjail *j, unsigned flags); 225 extern void dep_reset(struct cfjail *j); 226 extern struct cfjail *next_jail(void); 227 extern int start_state(const char *target, int docf, unsigned state, 228 int running); 229 extern void requeue(struct cfjail *j, struct cfjails *queue); 230 extern void requeue_head(struct cfjail *j, struct cfjails *queue); 231 232 extern void yyerror(const char *); 233 extern int yylex(void); 234 235 extern struct cfjails cfjails; 236 extern struct cfjails ready; 237 extern struct cfjails depend; 238 extern const char *cfname; 239 extern int iflag; 240 extern int note_remove; 241 extern int paralimit; 242 extern int verbose; 243