usr.sbin/jail/jailp.h

   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
  68 #define JF_OP_MASK              (JF_START | JF_SET | JF_STOP)
  69 #define JF_RESTART              (JF_START | JF_STOP)
  70 #define JF_START_SET            (JF_START | JF_SET)
  71 #define JF_SET_RESTART          (JF_SET | JF_STOP)
  72 #define JF_START_SET_RESTART    (JF_START | JF_SET | JF_STOP)
  73 #define JF_DO_STOP(js)          (((js) & (JF_SET | JF_STOP)) == JF_STOP)
  74
  75 enum intparam {
  76         IP__NULL = 0,           /* Null command */
  77         IP_ALLOW_DYING,         /* Allow making changes to a dying jail */
  78         IP_COMMAND,             /* Command run inside jail at creation */
  79         IP_DEPEND,              /* Jail starts after (stops before) another */
  80         IP_EXEC_CLEAN,          /* Run commands in a clean environment */
  81         IP_EXEC_CONSOLELOG,     /* Redirect optput for commands run in jail */
  82         IP_EXEC_FIB,            /* Run jailed commands with this FIB */
  83         IP_EXEC_JAIL_USER,      /* Run jailed commands as this user */
  84         IP_EXEC_POSTSTART,      /* Commands run outside jail after creating */
  85         IP_EXEC_POSTSTOP,       /* Commands run outside jail after removing */
  86         IP_EXEC_PRESTART,       /* Commands run outside jail before creating */
  87         IP_EXEC_PRESTOP,        /* Commands run outside jail before removing */
  88         IP_EXEC_START,          /* Commands run inside jail on creation */
  89         IP_EXEC_STOP,           /* Commands run inside jail on removal */
  90         IP_EXEC_SYSTEM_JAIL_USER,/* Get jail_user from system passwd file */
  91         IP_EXEC_SYSTEM_USER,    /* Run non-jailed commands as this user */
  92         IP_EXEC_TIMEOUT,        /* Time to wait for a command to complete */
  93 #if defined(INET) || defined(INET6)
  94         IP_INTERFACE,           /* Add IP addresses to this interface */
  95         IP_IP_HOSTNAME,         /* Get jail IP address(es) from hostname */
  96 #endif
  97         IP_MOUNT,               /* Mount points in fstab(5) form */
  98         IP_MOUNT_DEVFS,         /* Mount /dev under prison root */
  99         IP_MOUNT_FDESCFS,       /* Mount /dev/fd under prison root */
 100         IP_MOUNT_PROCFS,        /* Mount /proc under prison root */
 101         IP_MOUNT_FSTAB,         /* A standard fstab(5) file */
 102         IP_STOP_TIMEOUT,        /* Time to wait after sending SIGTERM */
 103         IP_VNET_INTERFACE,      /* Assign interface(s) to vnet jail */
 104 #ifdef INET
 105         IP__IP4_IFADDR,         /* Copy of ip4.addr with interface/netmask */
 106 #endif
 107 #ifdef INET6
 108         IP__IP6_IFADDR,         /* Copy of ip6.addr with interface/prefixlen */
 109 #endif
 110         IP__MOUNT_FROM_FSTAB,   /* Line from mount.fstab file */
 111         IP__OP,                 /* Placeholder for requested operation */
 112         KP_ALLOW_CHFLAGS,
 113         KP_ALLOW_MOUNT,
 114         KP_ALLOW_RAW_SOCKETS,
 115         KP_ALLOW_SET_HOSTNAME,
 116         KP_ALLOW_SOCKET_AF,
 117         KP_ALLOW_SYSVIPC,
 118         KP_DEVFS_RULESET,
 119         KP_ENFORCE_STATFS,
 120         KP_HOST_HOSTNAME,
 121 #ifdef INET
 122         KP_IP4_ADDR,
 123 #endif
 124 #ifdef INET6
 125         KP_IP6_ADDR,
 126 #endif
 127         KP_JID,
 128         KP_NAME,
 129         KP_PATH,
 130         KP_PERSIST,
 131         KP_SECURELEVEL,
 132         KP_VNET,
 133         IP_NPARAM
 134 };
 135
 136 STAILQ_HEAD(cfvars, cfvar);
 137
 138 struct cfvar {
 139         STAILQ_ENTRY(cfvar)     tq;
 140         char                    *name;
 141         size_t                  pos;
 142 };
 143
 144 TAILQ_HEAD(cfstrings, cfstring);
 145
 146 struct cfstring {
 147         TAILQ_ENTRY(cfstring)   tq;
 148         char                    *s;
 149         size_t                  len;
 150         struct cfvars           vars;
 151 };
 152
 153 TAILQ_HEAD(cfparams, cfparam);
 154
 155 struct cfparam {
 156         TAILQ_ENTRY(cfparam)    tq;
 157         char                    *name;
 158         struct cfstrings        val;
 159         unsigned                flags;
 160         int                     gen;
 161 };
 162
 163 TAILQ_HEAD(cfjails, cfjail);
 164 STAILQ_HEAD(cfdepends, cfdepend);
 165
 166 struct cfjail {
 167         TAILQ_ENTRY(cfjail)     tq;
 168         char                    *name;
 169         char                    *comline;
 170         struct cfparams         params;
 171         struct cfdepends        dep[2];
 172         struct cfjails          *queue;
 173         struct cfparam          *intparams[IP_NPARAM];
 174         struct cfstring         *comstring;
 175         struct jailparam        *jp;
 176         struct timespec         timeout;
 177         const enum intparam     *comparam;
 178         unsigned                flags;
 179         int                     jid;
 180         int                     seq;
 181         int                     pstatus;
 182         int                     ndeps;
 183         int                     njp;
 184         int                     nprocs;
 185 };
 186
 187 struct cfdepend {
 188         STAILQ_ENTRY(cfdepend)  tq[2];
 189         struct cfjail           *j[2];
 190         unsigned                flags;
 191 };
 192
 193 extern void *emalloc(size_t);
 194 extern void *erealloc(void *, size_t);
 195 extern char *estrdup(const char *);
 196 extern int create_jail(struct cfjail *j);
 197 extern void failed(struct cfjail *j);
 198 extern void jail_note(const struct cfjail *j, const char *fmt, ...);
 199 extern void jail_warnx(const struct cfjail *j, const char *fmt, ...);
 200
 201 extern int next_command(struct cfjail *j);
 202 extern int finish_command(struct cfjail *j);
 203 extern struct cfjail *next_proc(int nonblock);
 204
 205 extern void load_config(void);
 206 extern struct cfjail *add_jail(void);
 207 extern void add_param(struct cfjail *j, const struct cfparam *p,
 208     enum intparam ipnum, const char *value);
 209 extern int bool_param(const struct cfparam *p);
 210 extern int int_param(const struct cfparam *p, int *ip);
 211 extern const char *string_param(const struct cfparam *p);
 212 extern int check_intparams(struct cfjail *j);
 213 extern int import_params(struct cfjail *j);
 214 extern int equalopts(const char *opt1, const char *opt2);
 215 extern int wild_jail_name(const char *wname);
 216 extern int wild_jail_match(const char *jname, const char *wname);
 217
 218 extern void dep_setup(int docf);
 219 extern int dep_check(struct cfjail *j);
 220 extern void dep_done(struct cfjail *j, unsigned flags);
 221 extern void dep_reset(struct cfjail *j);
 222 extern struct cfjail *next_jail(void);
 223 extern int start_state(const char *target, int docf, unsigned state,
 224     int running);
 225 extern void requeue(struct cfjail *j, struct cfjails *queue);
 226
 227 extern void yyerror(const char *);
 228 extern int yylex(void);
 229
 230 extern struct cfjails cfjails;
 231 extern struct cfjails ready;
 232 extern struct cfjails depend;
 233 extern const char *cfname;
 234 extern int iflag;
 235 extern int note_remove;
 236 extern int paralimit;
 237 extern int verbose;