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 * $FreeBSD$ 10 * 11 */ 12 13 #include <sys/param.h> 14 #include <sys/types.h> 15 #include <sys/kernel.h> 16 #include <sys/systm.h> 17 #include <sys/errno.h> 18 #include <sys/sysproto.h> 19 #include <sys/malloc.h> 20 #include <sys/proc.h> 21 #include <sys/jail.h> 22 #include <sys/socket.h> 23 #include <net/if.h> 24 #include <netinet/in.h> 25 26 MALLOC_DEFINE(M_PRISON, "prison", "Prison structures"); 27 28 int 29 jail(p, uap) 30 struct proc *p; 31 struct jail_args /* { 32 syscallarg(struct jail *) jail; 33 } */ *uap; 34 { 35 int error; 36 struct prison *pr; 37 struct jail j; 38 struct chroot_args ca; 39 40 error = suser(p); 41 if (error) 42 return (error); 43 error = copyin(uap->jail, &j, sizeof j); 44 if (error) 45 return (error); 46 if (j.version != 0) 47 return (EINVAL); 48 MALLOC(pr, struct prison *, sizeof *pr , M_PRISON, M_WAITOK); 49 bzero((caddr_t)pr, sizeof *pr); 50 error = copyinstr(j.hostname, &pr->pr_host, sizeof pr->pr_host, 0); 51 if (error) 52 goto bail; 53 pr->pr_ip = j.ip_number; 54 55 ca.path = j.path; 56 error = chroot(p, &ca); 57 if (error) 58 goto bail; 59 60 pr->pr_ref++; 61 p->p_prison = pr; 62 p->p_flag |= P_JAILED; 63 return (0); 64 65 bail: 66 FREE(pr, M_PRISON); 67 return (error); 68 } 69 70 int 71 prison_ip(struct proc *p, int flag, u_int32_t *ip) 72 { 73 u_int32_t tmp; 74 75 if (!p->p_prison) 76 return (0); 77 if (flag) 78 tmp = *ip; 79 else 80 tmp = ntohl(*ip); 81 if (tmp == INADDR_ANY) { 82 if (flag) 83 *ip = p->p_prison->pr_ip; 84 else 85 *ip = htonl(p->p_prison->pr_ip); 86 return (0); 87 } 88 if (p->p_prison->pr_ip != tmp) 89 return (1); 90 return (0); 91 } 92 93 void 94 prison_remote_ip(struct proc *p, int flag, u_int32_t *ip) 95 { 96 u_int32_t tmp; 97 98 if (!p || !p->p_prison) 99 return; 100 if (flag) 101 tmp = *ip; 102 else 103 tmp = ntohl(*ip); 104 if (tmp == 0x7f000001) { 105 if (flag) 106 *ip = p->p_prison->pr_ip; 107 else 108 *ip = htonl(p->p_prison->pr_ip); 109 return; 110 } 111 return; 112 } 113 114 int 115 prison_if(struct proc *p, struct sockaddr *sa) 116 { 117 struct sockaddr_in *sai = (struct sockaddr_in*) sa; 118 int ok; 119 120 if (sai->sin_family != AF_INET) 121 ok = 0; 122 else if (p->p_prison->pr_ip != ntohl(sai->sin_addr.s_addr)) 123 ok = 1; 124 else 125 ok = 0; 126 return (ok); 127 } 128