/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2011 James Gritton. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #include #include #include #include #include #include #define CONF_FILE "/etc/jail.conf" #define DEP_FROM 0 #define DEP_TO 1 #define DF_SEEN 0x01 /* Dependency has been followed */ #define DF_LIGHT 0x02 /* Implied dependency on jail existence only */ #define DF_NOFAIL 0x04 /* Don't propagate failed jails */ #define PF_VAR 0x01 /* This is a variable, not a true parameter */ #define PF_APPEND 0x02 /* Append to existing parameter list */ #define PF_BAD 0x04 /* Unable to resolve parameter value */ #define PF_INTERNAL 0x08 /* Internal parameter, not passed to kernel */ #define PF_BOOL 0x10 /* Boolean parameter */ #define PF_INT 0x20 /* Integer parameter */ #define PF_CONV 0x40 /* Parameter duplicated in converted form */ #define PF_REV 0x80 /* Run commands in reverse order on stopping */ #define PF_IMMUTABLE 0x100 /* Immutable parameter */ #define JF_START 0x0001 /* -c */ #define JF_SET 0x0002 /* -m */ #define JF_STOP 0x0004 /* -r */ #define JF_DEPEND 0x0008 /* Operation required by dependency */ #define JF_WILD 0x0010 /* Not specified on the command line */ #define JF_FAILED 0x0020 /* Operation failed */ #define JF_PARAMS 0x0040 /* Parameters checked and imported */ #define JF_RDTUN 0x0080 /* Create-only parameter check has been done */ #define JF_PERSIST 0x0100 /* Jail is temporarily persistent */ #define JF_TIMEOUT 0x0200 /* A command (or process kill) timed out */ #define JF_SLEEPQ 0x0400 /* Waiting on a command and/or timeout */ #define JF_FROM_RUNQ 0x0800 /* Has already been on the run queue */ #define JF_SHOW 0x1000 /* -e Exhibit list of configured jails */ #define JF_OP_MASK (JF_START | JF_SET | JF_STOP) #define JF_RESTART (JF_START | JF_STOP) #define JF_START_SET (JF_START | JF_SET) #define JF_SET_RESTART (JF_SET | JF_STOP) #define JF_START_SET_RESTART (JF_START | JF_SET | JF_STOP) #define JF_DO_STOP(js) (((js) & (JF_SET | JF_STOP)) == JF_STOP) enum intparam { IP__NULL = 0, /* Null command */ IP_ALLOW_DYING, /* Allow making changes to a dying jail */ IP_COMMAND, /* Command run inside jail at creation */ IP_DEPEND, /* Jail starts after (stops before) another */ IP_EXEC_CLEAN, /* Run commands in a clean environment */ IP_EXEC_CONSOLELOG, /* Redirect optput for commands run in jail */ IP_EXEC_FIB, /* Run jailed commands with this FIB */ IP_EXEC_JAIL_USER, /* Run jailed commands as this user */ IP_EXEC_POSTSTART, /* Commands run outside jail after creating */ IP_EXEC_POSTSTOP, /* Commands run outside jail after removing */ IP_EXEC_PREPARE, /* Commands run outside jail before addrs and mounting */ IP_EXEC_PRESTART, /* Commands run outside jail before creating */ IP_EXEC_PRESTOP, /* Commands run outside jail before removing */ IP_EXEC_RELEASE, /* Commands run outside jail after addrs and unmounted */ IP_EXEC_CREATED, /* Commands run outside jail right after it was started */ IP_EXEC_START, /* Commands run inside jail on creation */ IP_EXEC_STOP, /* Commands run inside jail on removal */ IP_EXEC_SYSTEM_JAIL_USER,/* Get jail_user from system passwd file */ IP_EXEC_SYSTEM_USER, /* Run non-jailed commands as this user */ IP_EXEC_TIMEOUT, /* Time to wait for a command to complete */ #if defined(INET) || defined(INET6) IP_INTERFACE, /* Add IP addresses to this interface */ IP_IP_HOSTNAME, /* Get jail IP address(es) from hostname */ #endif IP_MOUNT, /* Mount points in fstab(5) form */ IP_MOUNT_DEVFS, /* Mount /dev under prison root */ IP_MOUNT_FDESCFS, /* Mount /dev/fd under prison root */ IP_MOUNT_PROCFS, /* Mount /proc under prison root */ IP_MOUNT_FSTAB, /* A standard fstab(5) file */ IP_STOP_TIMEOUT, /* Time to wait after sending SIGTERM */ IP_VNET_INTERFACE, /* Assign interface(s) to vnet jail */ #ifdef INET IP__IP4_IFADDR, /* Copy of ip4.addr with interface/netmask */ #endif #ifdef INET6 IP__IP6_IFADDR, /* Copy of ip6.addr with interface/prefixlen */ #endif IP__MOUNT_FROM_FSTAB, /* Line from mount.fstab file */ IP__OP, /* Placeholder for requested operation */ KP_ALLOW_CHFLAGS, KP_ALLOW_MOUNT, KP_ALLOW_RAW_SOCKETS, KP_ALLOW_SET_HOSTNAME, KP_ALLOW_SOCKET_AF, KP_ALLOW_SYSVIPC, KP_DEVFS_RULESET, KP_HOST_HOSTNAME, #ifdef INET KP_IP4_ADDR, #endif #ifdef INET6 KP_IP6_ADDR, #endif KP_JID, KP_NAME, KP_PATH, KP_PERSIST, KP_SECURELEVEL, KP_VNET, IP_NPARAM }; STAILQ_HEAD(cfvars, cfvar); struct cfvar { STAILQ_ENTRY(cfvar) tq; char *name; size_t pos; }; TAILQ_HEAD(cfstrings, cfstring); struct cfstring { TAILQ_ENTRY(cfstring) tq; char *s; size_t len; struct cfvars vars; }; TAILQ_HEAD(cfparams, cfparam); struct cfparam { TAILQ_ENTRY(cfparam) tq; char *name; struct cfstrings val; unsigned flags; int gen; }; TAILQ_HEAD(cfjails, cfjail); STAILQ_HEAD(cfdepends, cfdepend); struct cfjail { TAILQ_ENTRY(cfjail) tq; char *name; char *comline; struct cfparams params; struct cfdepends dep[2]; struct cfjails *queue; struct cfparam *intparams[IP_NPARAM]; struct cfstring *comstring; struct jailparam *jp; struct timespec timeout; const enum intparam *comparam; unsigned flags; int jid; int seq; int pstatus; int ndeps; int njp; int nprocs; }; struct cfdepend { STAILQ_ENTRY(cfdepend) tq[2]; struct cfjail *j[2]; unsigned flags; }; extern void *emalloc(size_t); extern void *erealloc(void *, size_t); extern char *estrdup(const char *); extern int create_jail(struct cfjail *j); extern void failed(struct cfjail *j); extern void jail_note(const struct cfjail *j, const char *fmt, ...); extern void jail_warnx(const struct cfjail *j, const char *fmt, ...); extern int next_command(struct cfjail *j); extern int finish_command(struct cfjail *j); extern struct cfjail *next_proc(int nonblock); extern void load_config(void); extern struct cfjail *add_jail(void); extern void add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, const char *value); extern int bool_param(const struct cfparam *p); extern int int_param(const struct cfparam *p, int *ip); extern const char *string_param(const struct cfparam *p); extern int check_intparams(struct cfjail *j); extern int import_params(struct cfjail *j); extern int equalopts(const char *opt1, const char *opt2); extern int wild_jail_name(const char *wname); extern int wild_jail_match(const char *jname, const char *wname); extern void dep_setup(int docf); extern int dep_check(struct cfjail *j); extern void dep_done(struct cfjail *j, unsigned flags); extern void dep_reset(struct cfjail *j); extern struct cfjail *next_jail(void); extern int start_state(const char *target, int docf, unsigned state, int running); extern void requeue(struct cfjail *j, struct cfjails *queue); extern void requeue_head(struct cfjail *j, struct cfjails *queue); extern void yyerror(const char *); extern int yylex(void); extern struct cfjails cfjails; extern struct cfjails ready; extern struct cfjails depend; extern const char *cfname; extern int iflag; extern int note_remove; extern int paralimit; extern int verbose;