2 * Copyright (c) 2011 James Gritton.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/param.h>
30 #include <sys/types.h>
32 #include <sys/queue.h>
37 #define CONF_FILE "/etc/jail.conf"
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 propigate failed jails */
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 */
55 #define JF_START 0x0001 /* -c */
56 #define JF_SET 0x0002 /* -m */
57 #define JF_STOP 0x0004 /* -r */
58 #define JF_DEPEND 0x0008 /* Operation required by dependency */
59 #define JF_WILD 0x0010 /* Not specified on the command line */
60 #define JF_FAILED 0x0020 /* Operation failed */
61 #define JF_PARAMS 0x0040 /* Parameters checked and imported */
62 #define JF_RDTUN 0x0080 /* Create-only parameter check has been done */
63 #define JF_PERSIST 0x0100 /* Jail is temporarily persistent */
64 #define JF_TIMEOUT 0x0200 /* A command (or process kill) timed out */
65 #define JF_SLEEPQ 0x0400 /* Waiting on a command and/or timeout */
67 #define JF_OP_MASK (JF_START | JF_SET | JF_STOP)
68 #define JF_RESTART (JF_START | JF_STOP)
69 #define JF_START_SET (JF_START | JF_SET)
70 #define JF_SET_RESTART (JF_SET | JF_STOP)
71 #define JF_START_SET_RESTART (JF_START | JF_SET | JF_STOP)
72 #define JF_DO_STOP(js) (((js) & (JF_SET | JF_STOP)) == JF_STOP)
75 IP__NULL = 0, /* Null command */
76 IP_ALLOW_DYING, /* Allow making changes to a dying jail */
77 IP_COMMAND, /* Command run inside jail at creation */
78 IP_DEPEND, /* Jail starts after (stops before) another */
79 IP_EXEC_CLEAN, /* Run commands in a clean environment */
80 IP_EXEC_CONSOLELOG, /* Redirect optput for commands run in jail */
81 IP_EXEC_FIB, /* Run jailed commands with this FIB */
82 IP_EXEC_JAIL_USER, /* Run jailed commands as this user */
83 IP_EXEC_POSTSTART, /* Commands run outside jail after creating */
84 IP_EXEC_POSTSTOP, /* Commands run outside jail after removing */
85 IP_EXEC_PRESTART, /* Commands run outside jail before creating */
86 IP_EXEC_PRESTOP, /* Commands run outside jail before removing */
87 IP_EXEC_START, /* Commands run inside jail on creation */
88 IP_EXEC_STOP, /* Commands run inside jail on removal */
89 IP_EXEC_SYSTEM_JAIL_USER,/* Get jail_user from system passwd file */
90 IP_EXEC_SYSTEM_USER, /* Run non-jailed commands as this user */
91 IP_EXEC_TIMEOUT, /* Time to wait for a command to complete */
92 #if defined(INET) || defined(INET6)
93 IP_INTERFACE, /* Add IP addresses to this interface */
94 IP_IP_HOSTNAME, /* Get jail IP address(es) from hostname */
96 IP_MOUNT, /* Mount points in fstab(5) form */
97 IP_MOUNT_DEVFS, /* Mount /dev under prison root */
98 IP_MOUNT_FSTAB, /* A standard fstab(5) file */
99 IP_STOP_TIMEOUT, /* Time to wait after sending SIGTERM */
100 IP_VNET_INTERFACE, /* Assign interface(s) to vnet jail */
102 IP__IP4_IFADDR, /* Copy of ip4.addr with interface/netmask */
105 IP__IP6_IFADDR, /* Copy of ip6.addr with interface/prefixlen */
107 IP__MOUNT_FROM_FSTAB, /* Line from mount.fstab file */
108 IP__OP, /* Placeholder for requested operation */
111 KP_ALLOW_RAW_SOCKETS,
112 KP_ALLOW_SET_HOSTNAME,
133 STAILQ_HEAD(cfvars, cfvar);
136 STAILQ_ENTRY(cfvar) tq;
141 TAILQ_HEAD(cfstrings, cfstring);
144 TAILQ_ENTRY(cfstring) tq;
150 TAILQ_HEAD(cfparams, cfparam);
153 TAILQ_ENTRY(cfparam) tq;
155 struct cfstrings val;
160 TAILQ_HEAD(cfjails, cfjail);
161 STAILQ_HEAD(cfdepends, cfdepend);
164 TAILQ_ENTRY(cfjail) tq;
167 struct cfparams params;
168 struct cfdepends dep[2];
169 struct cfjails *queue;
170 struct cfparam *intparams[IP_NPARAM];
171 struct cfstring *comstring;
172 struct jailparam *jp;
173 struct timespec timeout;
174 const enum intparam *comparam;
185 STAILQ_ENTRY(cfdepend) tq[2];
190 extern void *emalloc(size_t);
191 extern void *erealloc(void *, size_t);
192 extern char *estrdup(const char *);
193 extern int create_jail(struct cfjail *j);
194 extern void failed(struct cfjail *j);
195 extern void jail_note(const struct cfjail *j, const char *fmt, ...);
196 extern void jail_warnx(const struct cfjail *j, const char *fmt, ...);
198 extern int next_command(struct cfjail *j);
199 extern int finish_command(struct cfjail *j);
200 extern struct cfjail *next_proc(int nonblock);
202 extern void load_config(void);
203 extern struct cfjail *add_jail(void);
204 extern void add_param(struct cfjail *j, const struct cfparam *p,
205 enum intparam ipnum, const char *value);
206 extern int bool_param(const struct cfparam *p);
207 extern int int_param(const struct cfparam *p, int *ip);
208 extern const char *string_param(const struct cfparam *p);
209 extern int check_intparams(struct cfjail *j);
210 extern int import_params(struct cfjail *j);
211 extern int equalopts(const char *opt1, const char *opt2);
212 extern int wild_jail_name(const char *wname);
213 extern int wild_jail_match(const char *jname, const char *wname);
215 extern void dep_setup(int docf);
216 extern int dep_check(struct cfjail *j);
217 extern void dep_done(struct cfjail *j, unsigned flags);
218 extern void dep_reset(struct cfjail *j);
219 extern struct cfjail *next_jail(void);
220 extern int start_state(const char *target, int docf, unsigned state,
222 extern void requeue(struct cfjail *j, struct cfjails *queue);
224 extern void yyerror(const char *);
225 extern int yylex(void);
226 extern int yyparse(void);
228 extern struct cfjails cfjails;
229 extern struct cfjails ready;
230 extern struct cfjails depend;
231 extern const char *cfname;
233 extern int note_remove;
234 extern int paralimit;