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 76enum 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 137STAILQ_HEAD(cfvars, cfvar); 138 139struct cfvar { 140 STAILQ_ENTRY(cfvar) tq; 141 char *name; 142 size_t pos; 143}; 144 145TAILQ_HEAD(cfstrings, cfstring); 146 147struct cfstring { 148 TAILQ_ENTRY(cfstring) tq; 149 char *s; 150 size_t len; 151 struct cfvars vars; 152}; 153 154TAILQ_HEAD(cfparams, cfparam); 155 156struct cfparam { 157 TAILQ_ENTRY(cfparam) tq; 158 char *name; 159 struct cfstrings val; 160 unsigned flags; 161 int gen; 162}; 163 164TAILQ_HEAD(cfjails, cfjail); 165STAILQ_HEAD(cfdepends, cfdepend); 166 167struct 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 188struct cfdepend { 189 STAILQ_ENTRY(cfdepend) tq[2]; 190 struct cfjail *j[2]; 191 unsigned flags; 192}; 193 194extern void *emalloc(size_t); 195extern void *erealloc(void *, size_t); 196extern char *estrdup(const char *); 197extern int create_jail(struct cfjail *j); 198extern void failed(struct cfjail *j); 199extern void jail_note(const struct cfjail *j, const char *fmt, ...); 200extern void jail_warnx(const struct cfjail *j, const char *fmt, ...); 201 202extern int next_command(struct cfjail *j); 203extern int finish_command(struct cfjail *j); 204extern struct cfjail *next_proc(int nonblock); 205 206extern void load_config(void); 207extern struct cfjail *add_jail(void); 208extern void add_param(struct cfjail *j, const struct cfparam *p, 209 enum intparam ipnum, const char *value); 210extern int bool_param(const struct cfparam *p); 211extern int int_param(const struct cfparam *p, int *ip); 212extern const char *string_param(const struct cfparam *p); 213extern int check_intparams(struct cfjail *j); 214extern int import_params(struct cfjail *j); 215extern int equalopts(const char *opt1, const char *opt2); 216extern int wild_jail_name(const char *wname); 217extern int wild_jail_match(const char *jname, const char *wname); 218 219extern void dep_setup(int docf); 220extern int dep_check(struct cfjail *j); 221extern void dep_done(struct cfjail *j, unsigned flags); 222extern void dep_reset(struct cfjail *j); 223extern struct cfjail *next_jail(void); 224extern int start_state(const char *target, int docf, unsigned state, 225 int running); 226extern void requeue(struct cfjail *j, struct cfjails *queue); 227extern void requeue_head(struct cfjail *j, struct cfjails *queue); 228 229extern void yyerror(const char *); 230extern int yylex(void); 231 232extern struct cfjails cfjails; 233extern struct cfjails ready; 234extern struct cfjails depend; 235extern const char *cfname; 236extern int iflag; 237extern int note_remove; 238extern int paralimit; 239extern int verbose; 240