e08a87a21b
TCP/IP (v4) sockets, and routing sockets. Previously, interaction with IPv6 was not well-defined, and might be inappropriate for some environments. Similarly, sysctl MIB entries providing interface information also give out only addresses from those protocol domains. For the time being, this functionality is enabled by default, and toggleable using the sysctl variable jail.socket_unixiproute_only. In the future, protocol domains will be able to determine whether or not they are ``jail aware''. o Further limitations on process use of getpriority() and setpriority() by jailed processes. Addresses problem described in kern/17878. Reviewed by: phk, jmg
144 lines
3.0 KiB
C
144 lines
3.0 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* $FreeBSD$
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*
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/sysproto.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/jail.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <netinet/in.h>
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MALLOC_DEFINE(M_PRISON, "prison", "Prison structures");
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SYSCTL_NODE(, OID_AUTO, jail, CTLFLAG_RW, 0,
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"Jail rules");
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int jail_set_hostname_allowed = 1;
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SYSCTL_INT(_jail, OID_AUTO, set_hostname_allowed, CTLFLAG_RW,
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&jail_set_hostname_allowed, 0,
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"Processes in jail can set their hostnames");
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int jail_socket_unixiproute_only = 1;
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SYSCTL_INT(_jail, OID_AUTO, socket_unixiproute_only, CTLFLAG_RW,
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&jail_socket_unixiproute_only, 0,
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"Processes in jail are limited to creating UNIX/IPv4/route sockets only");
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int
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jail(p, uap)
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struct proc *p;
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struct jail_args /* {
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syscallarg(struct jail *) jail;
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} */ *uap;
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{
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int error;
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struct prison *pr;
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struct jail j;
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struct chroot_args ca;
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error = suser(p);
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if (error)
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return (error);
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error = copyin(uap->jail, &j, sizeof j);
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if (error)
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return (error);
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if (j.version != 0)
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return (EINVAL);
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MALLOC(pr, struct prison *, sizeof *pr , M_PRISON, M_WAITOK);
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bzero((caddr_t)pr, sizeof *pr);
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error = copyinstr(j.hostname, &pr->pr_host, sizeof pr->pr_host, 0);
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if (error)
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goto bail;
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pr->pr_ip = j.ip_number;
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ca.path = j.path;
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error = chroot(p, &ca);
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if (error)
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goto bail;
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pr->pr_ref++;
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p->p_prison = pr;
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p->p_flag |= P_JAILED;
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return (0);
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bail:
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FREE(pr, M_PRISON);
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return (error);
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}
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int
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prison_ip(struct proc *p, int flag, u_int32_t *ip)
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{
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u_int32_t tmp;
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if (!p->p_prison)
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return (0);
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if (flag)
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tmp = *ip;
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else
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tmp = ntohl(*ip);
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if (tmp == INADDR_ANY) {
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if (flag)
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*ip = p->p_prison->pr_ip;
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else
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*ip = htonl(p->p_prison->pr_ip);
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return (0);
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}
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if (p->p_prison->pr_ip != tmp)
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return (1);
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return (0);
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}
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void
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prison_remote_ip(struct proc *p, int flag, u_int32_t *ip)
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{
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u_int32_t tmp;
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if (!p || !p->p_prison)
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return;
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if (flag)
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tmp = *ip;
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else
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tmp = ntohl(*ip);
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if (tmp == 0x7f000001) {
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if (flag)
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*ip = p->p_prison->pr_ip;
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else
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*ip = htonl(p->p_prison->pr_ip);
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return;
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}
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return;
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}
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int
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prison_if(struct proc *p, struct sockaddr *sa)
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{
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struct sockaddr_in *sai = (struct sockaddr_in*) sa;
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int ok;
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if ((sai->sin_family != AF_INET) && jail_socket_unixiproute_only)
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ok = 1;
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else if (sai->sin_family != AF_INET)
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ok = 0;
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else if (p->p_prison->pr_ip != ntohl(sai->sin_addr.s_addr))
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ok = 1;
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else
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ok = 0;
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return (ok);
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}
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