1 /*- 2 * Copyright (c) 2011 James Gritton. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 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 37 #define CONF_FILE "/etc/jail.conf" 38 39 #define DEP_FROM 0 40 #define DEP_TO 1 41 42 #define DF_SEEN 0x01 /* Dependency has been followed */ 43 #define DF_LIGHT 0x02 /* Implied dependency on jail existence only */ 44 #define DF_NOFAIL 0x04 /* Don't propagate failed jails */ 45 46 #define PF_VAR 0x01 /* This is a variable, not a true parameter */ 47 #define PF_APPEND 0x02 /* Append to existing parameter list */ 48 #define PF_BAD 0x04 /* Unable to resolve parameter value */ 49 #define PF_INTERNAL 0x08 /* Internal parameter, not passed to kernel */ 50 #define PF_BOOL 0x10 /* Boolean parameter */ 51 #define PF_INT 0x20 /* Integer parameter */ 52 #define PF_CONV 0x40 /* Parameter duplicated in converted form */ 53 #define PF_REV 0x80 /* Run commands in reverse order on stopping */ 54 #define PF_IMMUTABLE 0x100 /* Immutable parameter */ 55 56 #define JF_START 0x0001 /* -c */ 57 #define JF_SET 0x0002 /* -m */ 58 #define JF_STOP 0x0004 /* -r */ 59 #define JF_DEPEND 0x0008 /* Operation required by dependency */ 60 #define JF_WILD 0x0010 /* Not specified on the command line */ 61 #define JF_FAILED 0x0020 /* Operation failed */ 62 #define JF_PARAMS 0x0040 /* Parameters checked and imported */ 63 #define JF_RDTUN 0x0080 /* Create-only parameter check has been done */ 64 #define JF_PERSIST 0x0100 /* Jail is temporarily persistent */ 65 #define JF_TIMEOUT 0x0200 /* A command (or process kill) timed out */ 66 #define JF_SLEEPQ 0x0400 /* Waiting on a command and/or timeout */ 67 #define JF_FROM_RUNQ 0x0800 /* Has already been on the run queue */ 68 69 #define JF_OP_MASK (JF_START | JF_SET | JF_STOP) 70 #define JF_RESTART (JF_START | JF_STOP) 71 #define JF_START_SET (JF_START | JF_SET) 72 #define JF_SET_RESTART (JF_SET | JF_STOP) 73 #define JF_START_SET_RESTART (JF_START | JF_SET | JF_STOP) 74 #define JF_DO_STOP(js) (((js) & (JF_SET | JF_STOP)) == JF_STOP) 75 76 enum intparam { 77 IP__NULL = 0, /* Null command */ 78 IP_ALLOW_DYING, /* Allow making changes to a dying jail */ 79 IP_COMMAND, /* Command run inside jail at creation */ 80 IP_DEPEND, /* Jail starts after (stops before) another */ 81 IP_EXEC_CLEAN, /* Run commands in a clean environment */ 82 IP_EXEC_CONSOLELOG, /* Redirect optput for commands run in jail */ 83 IP_EXEC_FIB, /* Run jailed commands with this FIB */ 84 IP_EXEC_JAIL_USER, /* Run jailed commands as this user */ 85 IP_EXEC_POSTSTART, /* Commands run outside jail after creating */ 86 IP_EXEC_POSTSTOP, /* Commands run outside jail after removing */ 87 IP_EXEC_PRESTART, /* Commands run outside jail before creating */ 88 IP_EXEC_PRESTOP, /* Commands run outside jail before removing */ 89 IP_EXEC_START, /* Commands run inside jail on creation */ 90 IP_EXEC_STOP, /* Commands run inside jail on removal */ 91 IP_EXEC_SYSTEM_JAIL_USER,/* Get jail_user from system passwd file */ 92 IP_EXEC_SYSTEM_USER, /* Run non-jailed commands as this user */ 93 IP_EXEC_TIMEOUT, /* Time to wait for a command to complete */ 94 #if defined(INET) || defined(INET6) 95 IP_INTERFACE, /* Add IP addresses to this interface */ 96 IP_IP_HOSTNAME, /* Get jail IP address(es) from hostname */ 97 #endif 98 IP_MOUNT, /* Mount points in fstab(5) form */ 99 IP_MOUNT_DEVFS, /* Mount /dev under prison root */ 100 IP_MOUNT_FDESCFS, /* Mount /dev/fd under prison root */ 101 IP_MOUNT_PROCFS, /* Mount /proc under prison root */ 102 IP_MOUNT_FSTAB, /* A standard fstab(5) file */ 103 IP_STOP_TIMEOUT, /* Time to wait after sending SIGTERM */ 104 IP_VNET_INTERFACE, /* Assign interface(s) to vnet jail */ 105 #ifdef INET 106 IP__IP4_IFADDR, /* Copy of ip4.addr with interface/netmask */ 107 #endif 108 #ifdef INET6 109 IP__IP6_IFADDR, /* Copy of ip6.addr with interface/prefixlen */ 110 #endif 111 IP__MOUNT_FROM_FSTAB, /* Line from mount.fstab file */ 112 IP__OP, /* Placeholder for requested operation */ 113 KP_ALLOW_CHFLAGS, 114 KP_ALLOW_MOUNT, 115 KP_ALLOW_RAW_SOCKETS, 116 KP_ALLOW_SET_HOSTNAME, 117 KP_ALLOW_SOCKET_AF, 118 KP_ALLOW_SYSVIPC, 119 KP_DEVFS_RULESET, 120 KP_ENFORCE_STATFS, 121 KP_HOST_HOSTNAME, 122 #ifdef INET 123 KP_IP4_ADDR, 124 #endif 125 #ifdef INET6 126 KP_IP6_ADDR, 127 #endif 128 KP_JID, 129 KP_NAME, 130 KP_PATH, 131 KP_PERSIST, 132 KP_SECURELEVEL, 133 KP_VNET, 134 IP_NPARAM 135 }; 136 137 STAILQ_HEAD(cfvars, cfvar); 138 139 struct cfvar { 140 STAILQ_ENTRY(cfvar) tq; 141 char *name; 142 size_t pos; 143 }; 144 145 TAILQ_HEAD(cfstrings, cfstring); 146 147 struct cfstring { 148 TAILQ_ENTRY(cfstring) tq; 149 char *s; 150 size_t len; 151 struct cfvars vars; 152 }; 153 154 TAILQ_HEAD(cfparams, cfparam); 155 156 struct cfparam { 157 TAILQ_ENTRY(cfparam) tq; 158 char *name; 159 struct cfstrings val; 160 unsigned flags; 161 int gen; 162 }; 163 164 TAILQ_HEAD(cfjails, cfjail); 165 STAILQ_HEAD(cfdepends, cfdepend); 166 167 struct cfjail { 168 TAILQ_ENTRY(cfjail) tq; 169 char *name; 170 char *comline; 171 struct cfparams params; 172 struct cfdepends dep[2]; 173 struct cfjails *queue; 174 struct cfparam *intparams[IP_NPARAM]; 175 struct cfstring *comstring; 176 struct jailparam *jp; 177 struct timespec timeout; 178 const enum intparam *comparam; 179 unsigned flags; 180 int jid; 181 int seq; 182 int pstatus; 183 int ndeps; 184 int njp; 185 int nprocs; 186 }; 187 188 struct cfdepend { 189 STAILQ_ENTRY(cfdepend) tq[2]; 190 struct cfjail *j[2]; 191 unsigned flags; 192 }; 193 194 extern void *emalloc(size_t); 195 extern void *erealloc(void *, size_t); 196 extern char *estrdup(const char *); 197 extern int create_jail(struct cfjail *j); 198 extern void failed(struct cfjail *j); 199 extern void jail_note(const struct cfjail *j, const char *fmt, ...); 200 extern void jail_warnx(const struct cfjail *j, const char *fmt, ...); 201 202 extern int next_command(struct cfjail *j); 203 extern int finish_command(struct cfjail *j); 204 extern struct cfjail *next_proc(int nonblock); 205 206 extern void load_config(void); 207 extern struct cfjail *add_jail(void); 208 extern void add_param(struct cfjail *j, const struct cfparam *p, 209 enum intparam ipnum, const char *value); 210 extern int bool_param(const struct cfparam *p); 211 extern int int_param(const struct cfparam *p, int *ip); 212 extern const char *string_param(const struct cfparam *p); 213 extern int check_intparams(struct cfjail *j); 214 extern int import_params(struct cfjail *j); 215 extern int equalopts(const char *opt1, const char *opt2); 216 extern int wild_jail_name(const char *wname); 217 extern int wild_jail_match(const char *jname, const char *wname); 218 219 extern void dep_setup(int docf); 220 extern int dep_check(struct cfjail *j); 221 extern void dep_done(struct cfjail *j, unsigned flags); 222 extern void dep_reset(struct cfjail *j); 223 extern struct cfjail *next_jail(void); 224 extern int start_state(const char *target, int docf, unsigned state, 225 int running); 226 extern void requeue(struct cfjail *j, struct cfjails *queue); 227 extern void requeue_head(struct cfjail *j, struct cfjails *queue); 228 229 extern void yyerror(const char *); 230 extern int yylex(void); 231 232 extern struct cfjails cfjails; 233 extern struct cfjails ready; 234 extern struct cfjails depend; 235 extern const char *cfname; 236 extern int iflag; 237 extern int note_remove; 238 extern int paralimit; 239 extern int verbose; 240