sys/sys/jail.h

   1 /*
   2  * ----------------------------------------------------------------------------
   3  * "THE BEER-WARE LICENSE" (Revision 42):
   4  * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
   5  * can do whatever you want with this stuff. If we meet some day, and you think
   6  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
   7  * ----------------------------------------------------------------------------
   8  *
   9  * $FreeBSD: src/sys/sys/jail.h,v 1.8.2.2 2000/11/01 17:58:06 rwatson Exp $
  10  */
  11
  12 #ifndef _SYS_JAIL_H_
  13 #define _SYS_JAIL_H_
  14
  15 #ifndef _SYS_TYPES_H_
  16 #include <sys/types.h>
  17 #endif
  18 #ifndef _SYS_PARAM_H_
  19 #include <sys/param.h>
  20 #endif
  21 #ifndef _SYS_QUEUE_H_
  22 #include <sys/queue.h>
  23 #endif
  24 #ifndef _SYS_UCRED_H_
  25 #include <sys/ucred.h>
  26 #endif
  27 #ifndef _NET_IF_H_
  28 #include <net/if.h>
  29 #endif
  30
  31 struct jail {
  32         uint32_t        version;
  33         char            *path;
  34         char            *hostname;
  35         uint32_t        n_ips;     /* Number of ips */
  36         struct sockaddr_storage *ips;
  37 };
  38
  39 struct jail_v0 {
  40         uint32_t        version;
  41         char            *path;
  42         char            *hostname;
  43         uint32_t        ip_number;
  44 };
  45
  46 #ifndef _KERNEL
  47
  48 int jail(struct jail *);
  49 int jail_attach(int);
  50
  51 #endif
  52
  53 #ifdef _KERNEL
  54
  55 #ifndef _SYS_NAMECACHE_H_
  56 #include <sys/namecache.h>
  57 #endif
  58 #ifndef _SYS_VARSYM_H_
  59 #include <sys/varsym.h>
  60 #endif
  61
  62 #ifdef MALLOC_DECLARE
  63 MALLOC_DECLARE(M_PRISON);
  64 #endif
  65
  66 #endif  /* _KERNEL */
  67
  68 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  69
  70 #define JAIL_MAX        999999
  71
  72 /* Used to store the IPs of the jail */
  73
  74 struct jail_ip_storage {
  75         struct sockaddr_storage ip;
  76         SLIST_ENTRY(jail_ip_storage) entries;
  77 };
  78
  79 /*
  80  * This structure describes a prison.  It is pointed to by all struct
  81  * ucred's of the inmates.  pr_ref keeps track of them and is used to
  82  * delete the struture when the last inmate is dead.
  83  */
  84
  85 struct prison {
  86         LIST_ENTRY(prison) pr_list;                     /* all prisons */
  87         int             pr_id;                          /* prison id */
  88         int             pr_ref;                         /* reference count */
  89         struct nchandle pr_root;                        /* namecache entry of root */
  90         char            pr_host[MAXHOSTNAMELEN];        /* host name */
  91         SLIST_HEAD(iplist, jail_ip_storage) pr_ips;     /* list of IP addresses */
  92         struct sockaddr_in      *local_ip4;             /* cache for a loopback ipv4 address */
  93         struct sockaddr_in      *nonlocal_ip4;          /* cache for a non loopback ipv4 address */
  94         struct sockaddr_in6     *local_ip6;             /* cache for a loopback ipv6 address */
  95         struct sockaddr_in6     *nonlocal_ip6;          /* cache for a non loopback ipv6 address */
  96         void            *pr_linux;                      /* Linux ABI emulation */
  97         int              pr_securelevel;                /* jail securelevel */
  98         struct varsymset pr_varsymset;                  /* jail varsyms */
  99 };
 100
 101 /*
 102  * Sysctl-set variables that determine global jail policy
 103  */
 104 extern int      jail_set_hostname_allowed;
 105 extern int      jail_socket_unixiproute_only;
 106 extern int      jail_sysvipc_allowed;
 107 extern int      jail_chflags_allowed;
 108 extern int      jail_allow_raw_sockets;
 109
 110 /*
 111  * Kernel support functions for jail.
 112  */
 113 int     jailed_ip(struct prison *, struct sockaddr *);
 114 void    prison_free(struct prison *);
 115 void    prison_hold(struct prison *);
 116 int     prison_if(struct ucred *cred, struct sockaddr *sa);
 117 struct sockaddr *
 118         prison_get_local(struct prison *pr, sa_family_t, struct sockaddr *);
 119 struct sockaddr *
 120         prison_get_nonlocal(struct prison *pr, sa_family_t, struct sockaddr *);
 121 int     prison_priv_check(struct ucred *cred, int priv);
 122 int     prison_remote_ip(struct thread *td, struct sockaddr *ip);
 123 int     prison_replace_wildcards(struct thread *td, struct sockaddr *ip);
 124
 125 /*
 126  * Return 1 if the passed credential is in a jail, otherwise 0.
 127  *
 128  * MPSAFE
 129  */
 130 static __inline int
 131 jailed(struct ucred *cred)
 132 {
 133         return(cred->cr_prison != NULL);
 134 }
 135
 136 #endif /* _KERNEL || _KERNEL_STRUCTURES */
 137 #endif /* !_SYS_JAIL_H_ */