Move IPv4-specific jail functions to new file netinet/in_jail.c
_prison_check_ip4 renamed to prison_check_ip4_locked Move IPv6-specific jail functions to new file netinet6/in6_jail.c _prison_check_ip6 renamed to prison_check_ip6_locked Add appropriate prototypes to sys/sys/jail.h Adjust kern_jail.c to call prison_check_ip4_locked and prison_check_ip6_locked accordingly. Add netinet/in_jail.c and netinet6/in6_jail.c to the list of files that need to be built when INET and INET6, respectively, are configured in the kernel configuration file. Reviewed by: jtl Approved by: sjg (mentor) Sponsored by: Juniper Networks, Inc. Differential Revision: https://reviews.freebsd.org/D6799
This commit is contained in:
Stephen J. Kiernan
parent
603e05dbcb
commit
0ce1624d0e
@ -3748,6 +3748,7 @@ netinet/in_fib.c optional inet
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netinet/in_gif.c optional gif inet | netgraph_gif inet
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netinet/in_gif.c optional gif inet | netgraph_gif inet
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netinet/ip_gre.c optional gre inet
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netinet/ip_gre.c optional gre inet
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netinet/ip_id.c optional inet
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netinet/ip_id.c optional inet
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netinet/in_jail.c optional inet
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netinet/in_mcast.c optional inet
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netinet/in_mcast.c optional inet
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netinet/in_pcb.c optional inet | inet6
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netinet/in_pcb.c optional inet | inet6
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netinet/in_pcbgroup.c optional inet pcbgroup | inet6 pcbgroup
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netinet/in_pcbgroup.c optional inet pcbgroup | inet6 pcbgroup
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@ -3816,6 +3817,7 @@ netinet6/in6_cksum.c optional inet6
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netinet6/in6_fib.c optional inet6
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netinet6/in6_fib.c optional inet6
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netinet6/in6_gif.c optional gif inet6 | netgraph_gif inet6
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netinet6/in6_gif.c optional gif inet6 | netgraph_gif inet6
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netinet6/in6_ifattach.c optional inet6
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netinet6/in6_ifattach.c optional inet6
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netinet6/in6_jail.c optional inet6
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netinet6/in6_mcast.c optional inet6
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netinet6/in6_mcast.c optional inet6
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netinet6/in6_pcb.c optional inet6
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netinet6/in6_pcb.c optional inet6
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netinet6/in6_pcbgroup.c optional inet6 pcbgroup
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netinet6/in6_pcbgroup.c optional inet6 pcbgroup
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@ -130,14 +130,6 @@ static void prison_racct_attach(struct prison *pr);
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static void prison_racct_modify(struct prison *pr);
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static void prison_racct_modify(struct prison *pr);
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static void prison_racct_detach(struct prison *pr);
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static void prison_racct_detach(struct prison *pr);
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#endif
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#endif
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#ifdef INET
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static int _prison_check_ip4(const struct prison *, const struct in_addr *);
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static int prison_restrict_ip4(struct prison *pr, struct in_addr *newip4);
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#endif
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#ifdef INET6
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static int _prison_check_ip6(struct prison *pr, struct in6_addr *ia6);
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static int prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6);
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#endif
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/* Flags for prison_deref */
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/* Flags for prison_deref */
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#define PD_DEREF 0x01
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#define PD_DEREF 0x01
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@ -252,54 +244,6 @@ prison0_init(void)
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strlcpy(prison0.pr_osrelease, osrelease, sizeof(prison0.pr_osrelease));
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strlcpy(prison0.pr_osrelease, osrelease, sizeof(prison0.pr_osrelease));
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}
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}
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#ifdef INET
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static int
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qcmp_v4(const void *ip1, const void *ip2)
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{
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in_addr_t iaa, iab;
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/*
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* We need to compare in HBO here to get the list sorted as expected
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* by the result of the code. Sorting NBO addresses gives you
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* interesting results. If you do not understand, do not try.
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*/
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iaa = ntohl(((const struct in_addr *)ip1)->s_addr);
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iab = ntohl(((const struct in_addr *)ip2)->s_addr);
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/*
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* Do not simply return the difference of the two numbers, the int is
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* not wide enough.
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*/
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if (iaa > iab)
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return (1);
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else if (iaa < iab)
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return (-1);
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else
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return (0);
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}
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#endif
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#ifdef INET6
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static int
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qcmp_v6(const void *ip1, const void *ip2)
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{
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const struct in6_addr *ia6a, *ia6b;
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int i, rc;
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ia6a = (const struct in6_addr *)ip1;
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ia6b = (const struct in6_addr *)ip2;
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rc = 0;
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for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) {
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if (ia6a->s6_addr[i] > ia6b->s6_addr[i])
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rc = 1;
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else if (ia6a->s6_addr[i] < ia6b->s6_addr[i])
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rc = -1;
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}
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return (rc);
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}
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#endif
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/*
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/*
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* struct jail_args {
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* struct jail_args {
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* struct jail *jail;
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* struct jail *jail;
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@ -845,7 +789,8 @@ kern_jail_set(struct thread *td, struct uio *optuio, int flags)
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* address to connect from.
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* address to connect from.
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*/
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*/
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if (ip4s > 1)
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if (ip4s > 1)
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qsort(ip4 + 1, ip4s - 1, sizeof(*ip4), qcmp_v4);
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qsort(ip4 + 1, ip4s - 1, sizeof(*ip4),
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prison_qcmp_v4);
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/*
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/*
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* Check for duplicate addresses and do some simple
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* Check for duplicate addresses and do some simple
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* zero and broadcast checks. If users give other bogus
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* zero and broadcast checks. If users give other bogus
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@ -893,7 +838,8 @@ kern_jail_set(struct thread *td, struct uio *optuio, int flags)
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ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK);
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ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK);
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bcopy(op, ip6, ip6s * sizeof(*ip6));
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bcopy(op, ip6, ip6s * sizeof(*ip6));
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if (ip6s > 1)
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if (ip6s > 1)
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qsort(ip6 + 1, ip6s - 1, sizeof(*ip6), qcmp_v6);
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qsort(ip6 + 1, ip6s - 1, sizeof(*ip6),
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prison_qcmp_v6);
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for (ii = 0; ii < ip6s; ii++) {
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for (ii = 0; ii < ip6s; ii++) {
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if (IN6_IS_ADDR_UNSPECIFIED(&ip6[ii])) {
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if (IN6_IS_ADDR_UNSPECIFIED(&ip6[ii])) {
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error = EINVAL;
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error = EINVAL;
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@ -1486,7 +1432,8 @@ kern_jail_set(struct thread *td, struct uio *optuio, int flags)
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(ip4s == 1 && tpr->pr_ip4s == 1))
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(ip4s == 1 && tpr->pr_ip4s == 1))
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continue;
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continue;
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for (ii = 0; ii < ip4s; ii++) {
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for (ii = 0; ii < ip4s; ii++) {
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if (_prison_check_ip4(tpr, &ip4[ii]) == 0) {
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if (prison_check_ip4_locked(tpr, &ip4[ii]) ==
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0) {
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error = EADDRINUSE;
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error = EADDRINUSE;
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vfs_opterror(opts,
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vfs_opterror(opts,
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"IPv4 addresses clash");
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"IPv4 addresses clash");
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@ -1552,7 +1499,8 @@ kern_jail_set(struct thread *td, struct uio *optuio, int flags)
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(ip6s == 1 && tpr->pr_ip6s == 1))
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(ip6s == 1 && tpr->pr_ip6s == 1))
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continue;
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continue;
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for (ii = 0; ii < ip6s; ii++) {
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for (ii = 0; ii < ip6s; ii++) {
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if (_prison_check_ip6(tpr, &ip6[ii]) == 0) {
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if (prison_check_ip6_locked(tpr, &ip6[ii]) ==
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0) {
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error = EADDRINUSE;
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error = EADDRINUSE;
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vfs_opterror(opts,
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vfs_opterror(opts,
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"IPv6 addresses clash");
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"IPv6 addresses clash");
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@ -2770,684 +2718,6 @@ prison_proc_free(struct prison *pr)
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mtx_unlock(&pr->pr_mtx);
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mtx_unlock(&pr->pr_mtx);
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}
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}
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#ifdef INET
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/*
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* Restrict a prison's IP address list with its parent's, possibly replacing
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* it. Return true if the replacement buffer was used (or would have been).
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*/
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static int
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prison_restrict_ip4(struct prison *pr, struct in_addr *newip4)
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{
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int ii, ij, used;
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struct prison *ppr;
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ppr = pr->pr_parent;
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if (!(pr->pr_flags & PR_IP4_USER)) {
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/* This has no user settings, so just copy the parent's list. */
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if (pr->pr_ip4s < ppr->pr_ip4s) {
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/*
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* There's no room for the parent's list. Use the
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* new list buffer, which is assumed to be big enough
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* (if it was passed). If there's no buffer, try to
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* allocate one.
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*/
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used = 1;
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if (newip4 == NULL) {
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newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4),
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M_PRISON, M_NOWAIT);
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if (newip4 != NULL)
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used = 0;
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}
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if (newip4 != NULL) {
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bcopy(ppr->pr_ip4, newip4,
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ppr->pr_ip4s * sizeof(*newip4));
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free(pr->pr_ip4, M_PRISON);
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pr->pr_ip4 = newip4;
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pr->pr_ip4s = ppr->pr_ip4s;
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}
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return (used);
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}
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pr->pr_ip4s = ppr->pr_ip4s;
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if (pr->pr_ip4s > 0)
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bcopy(ppr->pr_ip4, pr->pr_ip4,
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pr->pr_ip4s * sizeof(*newip4));
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else if (pr->pr_ip4 != NULL) {
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free(pr->pr_ip4, M_PRISON);
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pr->pr_ip4 = NULL;
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}
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} else if (pr->pr_ip4s > 0) {
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/* Remove addresses that aren't in the parent. */
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for (ij = 0; ij < ppr->pr_ip4s; ij++)
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if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr)
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break;
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if (ij < ppr->pr_ip4s)
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ii = 1;
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else {
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bcopy(pr->pr_ip4 + 1, pr->pr_ip4,
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--pr->pr_ip4s * sizeof(*pr->pr_ip4));
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ii = 0;
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}
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for (ij = 1; ii < pr->pr_ip4s; ) {
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if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) {
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ii++;
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continue;
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}
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switch (ij >= ppr->pr_ip4s ? -1 :
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qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) {
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case -1:
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bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii,
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(--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4));
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break;
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case 0:
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ii++;
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ij++;
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break;
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case 1:
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ij++;
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break;
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}
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}
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if (pr->pr_ip4s == 0) {
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free(pr->pr_ip4, M_PRISON);
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pr->pr_ip4 = NULL;
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}
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}
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return (0);
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}
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/*
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* Pass back primary IPv4 address of this jail.
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*
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* If not restricted return success but do not alter the address. Caller has
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* to make sure to initialize it correctly (e.g. INADDR_ANY).
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*
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* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4.
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* Address returned in NBO.
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*/
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int
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prison_get_ip4(struct ucred *cred, struct in_addr *ia)
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{
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struct prison *pr;
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KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
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KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
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pr = cred->cr_prison;
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if (!(pr->pr_flags & PR_IP4))
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return (0);
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mtx_lock(&pr->pr_mtx);
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if (!(pr->pr_flags & PR_IP4)) {
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mtx_unlock(&pr->pr_mtx);
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return (0);
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}
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if (pr->pr_ip4 == NULL) {
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mtx_unlock(&pr->pr_mtx);
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return (EAFNOSUPPORT);
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}
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ia->s_addr = pr->pr_ip4[0].s_addr;
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mtx_unlock(&pr->pr_mtx);
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return (0);
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}
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/*
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* Return 1 if we should do proper source address selection or are not jailed.
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* We will return 0 if we should bypass source address selection in favour
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* of the primary jail IPv4 address. Only in this case *ia will be updated and
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* returned in NBO.
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* Return EAFNOSUPPORT, in case this jail does not allow IPv4.
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*/
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int
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prison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia)
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{
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struct prison *pr;
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struct in_addr lia;
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int error;
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KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
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KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
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if (!jailed(cred))
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return (1);
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pr = cred->cr_prison;
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if (pr->pr_flags & PR_IP4_SADDRSEL)
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return (1);
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lia.s_addr = INADDR_ANY;
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error = prison_get_ip4(cred, &lia);
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if (error)
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return (error);
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if (lia.s_addr == INADDR_ANY)
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return (1);
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ia->s_addr = lia.s_addr;
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return (0);
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}
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/*
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* Return true if pr1 and pr2 have the same IPv4 address restrictions.
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*/
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int
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prison_equal_ip4(struct prison *pr1, struct prison *pr2)
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{
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if (pr1 == pr2)
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return (1);
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/*
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* No need to lock since the PR_IP4_USER flag can't be altered for
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* existing prisons.
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*/
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while (pr1 != &prison0 &&
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#ifdef VIMAGE
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!(pr1->pr_flags & PR_VNET) &&
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#endif
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!(pr1->pr_flags & PR_IP4_USER))
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pr1 = pr1->pr_parent;
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while (pr2 != &prison0 &&
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#ifdef VIMAGE
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!(pr2->pr_flags & PR_VNET) &&
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#endif
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!(pr2->pr_flags & PR_IP4_USER))
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pr2 = pr2->pr_parent;
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return (pr1 == pr2);
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}
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/*
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* Make sure our (source) address is set to something meaningful to this
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* jail.
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*
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* Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail,
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* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
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* doesn't allow IPv4. Address passed in in NBO and returned in NBO.
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*/
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int
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prison_local_ip4(struct ucred *cred, struct in_addr *ia)
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{
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struct prison *pr;
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struct in_addr ia0;
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int error;
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|
||||||
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
||||||
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
|
||||||
|
|
||||||
pr = cred->cr_prison;
|
|
||||||
if (!(pr->pr_flags & PR_IP4))
|
|
||||||
return (0);
|
|
||||||
mtx_lock(&pr->pr_mtx);
|
|
||||||
if (!(pr->pr_flags & PR_IP4)) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
if (pr->pr_ip4 == NULL) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (EAFNOSUPPORT);
|
|
||||||
}
|
|
||||||
|
|
||||||
ia0.s_addr = ntohl(ia->s_addr);
|
|
||||||
if (ia0.s_addr == INADDR_LOOPBACK) {
|
|
||||||
ia->s_addr = pr->pr_ip4[0].s_addr;
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (ia0.s_addr == INADDR_ANY) {
|
|
||||||
/*
|
|
||||||
* In case there is only 1 IPv4 address, bind directly.
|
|
||||||
*/
|
|
||||||
if (pr->pr_ip4s == 1)
|
|
||||||
ia->s_addr = pr->pr_ip4[0].s_addr;
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
error = _prison_check_ip4(pr, ia);
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (error);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Rewrite destination address in case we will connect to loopback address.
|
|
||||||
*
|
|
||||||
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4.
|
|
||||||
* Address passed in in NBO and returned in NBO.
|
|
||||||
*/
|
|
||||||
int
|
|
||||||
prison_remote_ip4(struct ucred *cred, struct in_addr *ia)
|
|
||||||
{
|
|
||||||
struct prison *pr;
|
|
||||||
|
|
||||||
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
||||||
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
|
||||||
|
|
||||||
pr = cred->cr_prison;
|
|
||||||
if (!(pr->pr_flags & PR_IP4))
|
|
||||||
return (0);
|
|
||||||
mtx_lock(&pr->pr_mtx);
|
|
||||||
if (!(pr->pr_flags & PR_IP4)) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
if (pr->pr_ip4 == NULL) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (EAFNOSUPPORT);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (ntohl(ia->s_addr) == INADDR_LOOPBACK) {
|
|
||||||
ia->s_addr = pr->pr_ip4[0].s_addr;
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Return success because nothing had to be changed.
|
|
||||||
*/
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Check if given address belongs to the jail referenced by cred/prison.
|
|
||||||
*
|
|
||||||
* Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail,
|
|
||||||
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
|
||||||
* doesn't allow IPv4. Address passed in in NBO.
|
|
||||||
*/
|
|
||||||
static int
|
|
||||||
_prison_check_ip4(const struct prison *pr, const struct in_addr *ia)
|
|
||||||
{
|
|
||||||
int i, a, z, d;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Check the primary IP.
|
|
||||||
*/
|
|
||||||
if (pr->pr_ip4[0].s_addr == ia->s_addr)
|
|
||||||
return (0);
|
|
||||||
|
|
||||||
/*
|
|
||||||
* All the other IPs are sorted so we can do a binary search.
|
|
||||||
*/
|
|
||||||
a = 0;
|
|
||||||
z = pr->pr_ip4s - 2;
|
|
||||||
while (a <= z) {
|
|
||||||
i = (a + z) / 2;
|
|
||||||
d = qcmp_v4(&pr->pr_ip4[i+1], ia);
|
|
||||||
if (d > 0)
|
|
||||||
z = i - 1;
|
|
||||||
else if (d < 0)
|
|
||||||
a = i + 1;
|
|
||||||
else
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
return (EADDRNOTAVAIL);
|
|
||||||
}
|
|
||||||
|
|
||||||
int
|
|
||||||
prison_check_ip4(const struct ucred *cred, const struct in_addr *ia)
|
|
||||||
{
|
|
||||||
struct prison *pr;
|
|
||||||
int error;
|
|
||||||
|
|
||||||
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
||||||
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
|
||||||
|
|
||||||
pr = cred->cr_prison;
|
|
||||||
if (!(pr->pr_flags & PR_IP4))
|
|
||||||
return (0);
|
|
||||||
mtx_lock(&pr->pr_mtx);
|
|
||||||
if (!(pr->pr_flags & PR_IP4)) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
if (pr->pr_ip4 == NULL) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (EAFNOSUPPORT);
|
|
||||||
}
|
|
||||||
|
|
||||||
error = _prison_check_ip4(pr, ia);
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (error);
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#ifdef INET6
|
|
||||||
static int
|
|
||||||
prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6)
|
|
||||||
{
|
|
||||||
int ii, ij, used;
|
|
||||||
struct prison *ppr;
|
|
||||||
|
|
||||||
ppr = pr->pr_parent;
|
|
||||||
if (!(pr->pr_flags & PR_IP6_USER)) {
|
|
||||||
/* This has no user settings, so just copy the parent's list. */
|
|
||||||
if (pr->pr_ip6s < ppr->pr_ip6s) {
|
|
||||||
/*
|
|
||||||
* There's no room for the parent's list. Use the
|
|
||||||
* new list buffer, which is assumed to be big enough
|
|
||||||
* (if it was passed). If there's no buffer, try to
|
|
||||||
* allocate one.
|
|
||||||
*/
|
|
||||||
used = 1;
|
|
||||||
if (newip6 == NULL) {
|
|
||||||
newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6),
|
|
||||||
M_PRISON, M_NOWAIT);
|
|
||||||
if (newip6 != NULL)
|
|
||||||
used = 0;
|
|
||||||
}
|
|
||||||
if (newip6 != NULL) {
|
|
||||||
bcopy(ppr->pr_ip6, newip6,
|
|
||||||
ppr->pr_ip6s * sizeof(*newip6));
|
|
||||||
free(pr->pr_ip6, M_PRISON);
|
|
||||||
pr->pr_ip6 = newip6;
|
|
||||||
pr->pr_ip6s = ppr->pr_ip6s;
|
|
||||||
}
|
|
||||||
return (used);
|
|
||||||
}
|
|
||||||
pr->pr_ip6s = ppr->pr_ip6s;
|
|
||||||
if (pr->pr_ip6s > 0)
|
|
||||||
bcopy(ppr->pr_ip6, pr->pr_ip6,
|
|
||||||
pr->pr_ip6s * sizeof(*newip6));
|
|
||||||
else if (pr->pr_ip6 != NULL) {
|
|
||||||
free(pr->pr_ip6, M_PRISON);
|
|
||||||
pr->pr_ip6 = NULL;
|
|
||||||
}
|
|
||||||
} else if (pr->pr_ip6s > 0) {
|
|
||||||
/* Remove addresses that aren't in the parent. */
|
|
||||||
for (ij = 0; ij < ppr->pr_ip6s; ij++)
|
|
||||||
if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0],
|
|
||||||
&ppr->pr_ip6[ij]))
|
|
||||||
break;
|
|
||||||
if (ij < ppr->pr_ip6s)
|
|
||||||
ii = 1;
|
|
||||||
else {
|
|
||||||
bcopy(pr->pr_ip6 + 1, pr->pr_ip6,
|
|
||||||
--pr->pr_ip6s * sizeof(*pr->pr_ip6));
|
|
||||||
ii = 0;
|
|
||||||
}
|
|
||||||
for (ij = 1; ii < pr->pr_ip6s; ) {
|
|
||||||
if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii],
|
|
||||||
&ppr->pr_ip6[0])) {
|
|
||||||
ii++;
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
switch (ij >= ppr->pr_ip6s ? -1 :
|
|
||||||
qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) {
|
|
||||||
case -1:
|
|
||||||
bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii,
|
|
||||||
(--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6));
|
|
||||||
break;
|
|
||||||
case 0:
|
|
||||||
ii++;
|
|
||||||
ij++;
|
|
||||||
break;
|
|
||||||
case 1:
|
|
||||||
ij++;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
if (pr->pr_ip6s == 0) {
|
|
||||||
free(pr->pr_ip6, M_PRISON);
|
|
||||||
pr->pr_ip6 = NULL;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Pass back primary IPv6 address for this jail.
|
|
||||||
*
|
|
||||||
* If not restricted return success but do not alter the address. Caller has
|
|
||||||
* to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT).
|
|
||||||
*
|
|
||||||
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6.
|
|
||||||
*/
|
|
||||||
int
|
|
||||||
prison_get_ip6(struct ucred *cred, struct in6_addr *ia6)
|
|
||||||
{
|
|
||||||
struct prison *pr;
|
|
||||||
|
|
||||||
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
||||||
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
|
||||||
|
|
||||||
pr = cred->cr_prison;
|
|
||||||
if (!(pr->pr_flags & PR_IP6))
|
|
||||||
return (0);
|
|
||||||
mtx_lock(&pr->pr_mtx);
|
|
||||||
if (!(pr->pr_flags & PR_IP6)) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
if (pr->pr_ip6 == NULL) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (EAFNOSUPPORT);
|
|
||||||
}
|
|
||||||
|
|
||||||
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Return 1 if we should do proper source address selection or are not jailed.
|
|
||||||
* We will return 0 if we should bypass source address selection in favour
|
|
||||||
* of the primary jail IPv6 address. Only in this case *ia will be updated and
|
|
||||||
* returned in NBO.
|
|
||||||
* Return EAFNOSUPPORT, in case this jail does not allow IPv6.
|
|
||||||
*/
|
|
||||||
int
|
|
||||||
prison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6)
|
|
||||||
{
|
|
||||||
struct prison *pr;
|
|
||||||
struct in6_addr lia6;
|
|
||||||
int error;
|
|
||||||
|
|
||||||
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
||||||
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
|
||||||
|
|
||||||
if (!jailed(cred))
|
|
||||||
return (1);
|
|
||||||
|
|
||||||
pr = cred->cr_prison;
|
|
||||||
if (pr->pr_flags & PR_IP6_SADDRSEL)
|
|
||||||
return (1);
|
|
||||||
|
|
||||||
lia6 = in6addr_any;
|
|
||||||
error = prison_get_ip6(cred, &lia6);
|
|
||||||
if (error)
|
|
||||||
return (error);
|
|
||||||
if (IN6_IS_ADDR_UNSPECIFIED(&lia6))
|
|
||||||
return (1);
|
|
||||||
|
|
||||||
bcopy(&lia6, ia6, sizeof(struct in6_addr));
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Return true if pr1 and pr2 have the same IPv6 address restrictions.
|
|
||||||
*/
|
|
||||||
int
|
|
||||||
prison_equal_ip6(struct prison *pr1, struct prison *pr2)
|
|
||||||
{
|
|
||||||
|
|
||||||
if (pr1 == pr2)
|
|
||||||
return (1);
|
|
||||||
|
|
||||||
while (pr1 != &prison0 &&
|
|
||||||
#ifdef VIMAGE
|
|
||||||
!(pr1->pr_flags & PR_VNET) &&
|
|
||||||
#endif
|
|
||||||
!(pr1->pr_flags & PR_IP6_USER))
|
|
||||||
pr1 = pr1->pr_parent;
|
|
||||||
while (pr2 != &prison0 &&
|
|
||||||
#ifdef VIMAGE
|
|
||||||
!(pr2->pr_flags & PR_VNET) &&
|
|
||||||
#endif
|
|
||||||
!(pr2->pr_flags & PR_IP6_USER))
|
|
||||||
pr2 = pr2->pr_parent;
|
|
||||||
return (pr1 == pr2);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Make sure our (source) address is set to something meaningful to this jail.
|
|
||||||
*
|
|
||||||
* v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0)
|
|
||||||
* when needed while binding.
|
|
||||||
*
|
|
||||||
* Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail,
|
|
||||||
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
|
||||||
* doesn't allow IPv6.
|
|
||||||
*/
|
|
||||||
int
|
|
||||||
prison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only)
|
|
||||||
{
|
|
||||||
struct prison *pr;
|
|
||||||
int error;
|
|
||||||
|
|
||||||
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
||||||
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
|
||||||
|
|
||||||
pr = cred->cr_prison;
|
|
||||||
if (!(pr->pr_flags & PR_IP6))
|
|
||||||
return (0);
|
|
||||||
mtx_lock(&pr->pr_mtx);
|
|
||||||
if (!(pr->pr_flags & PR_IP6)) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
if (pr->pr_ip6 == NULL) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (EAFNOSUPPORT);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (IN6_IS_ADDR_LOOPBACK(ia6)) {
|
|
||||||
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (IN6_IS_ADDR_UNSPECIFIED(ia6)) {
|
|
||||||
/*
|
|
||||||
* In case there is only 1 IPv6 address, and v6only is true,
|
|
||||||
* then bind directly.
|
|
||||||
*/
|
|
||||||
if (v6only != 0 && pr->pr_ip6s == 1)
|
|
||||||
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
error = _prison_check_ip6(pr, ia6);
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (error);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Rewrite destination address in case we will connect to loopback address.
|
|
||||||
*
|
|
||||||
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6.
|
|
||||||
*/
|
|
||||||
int
|
|
||||||
prison_remote_ip6(struct ucred *cred, struct in6_addr *ia6)
|
|
||||||
{
|
|
||||||
struct prison *pr;
|
|
||||||
|
|
||||||
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
||||||
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
|
||||||
|
|
||||||
pr = cred->cr_prison;
|
|
||||||
if (!(pr->pr_flags & PR_IP6))
|
|
||||||
return (0);
|
|
||||||
mtx_lock(&pr->pr_mtx);
|
|
||||||
if (!(pr->pr_flags & PR_IP6)) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
if (pr->pr_ip6 == NULL) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (EAFNOSUPPORT);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (IN6_IS_ADDR_LOOPBACK(ia6)) {
|
|
||||||
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Return success because nothing had to be changed.
|
|
||||||
*/
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Check if given address belongs to the jail referenced by cred/prison.
|
|
||||||
*
|
|
||||||
* Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail,
|
|
||||||
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
|
||||||
* doesn't allow IPv6.
|
|
||||||
*/
|
|
||||||
static int
|
|
||||||
_prison_check_ip6(struct prison *pr, struct in6_addr *ia6)
|
|
||||||
{
|
|
||||||
int i, a, z, d;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Check the primary IP.
|
|
||||||
*/
|
|
||||||
if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6))
|
|
||||||
return (0);
|
|
||||||
|
|
||||||
/*
|
|
||||||
* All the other IPs are sorted so we can do a binary search.
|
|
||||||
*/
|
|
||||||
a = 0;
|
|
||||||
z = pr->pr_ip6s - 2;
|
|
||||||
while (a <= z) {
|
|
||||||
i = (a + z) / 2;
|
|
||||||
d = qcmp_v6(&pr->pr_ip6[i+1], ia6);
|
|
||||||
if (d > 0)
|
|
||||||
z = i - 1;
|
|
||||||
else if (d < 0)
|
|
||||||
a = i + 1;
|
|
||||||
else
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
return (EADDRNOTAVAIL);
|
|
||||||
}
|
|
||||||
|
|
||||||
int
|
|
||||||
prison_check_ip6(struct ucred *cred, struct in6_addr *ia6)
|
|
||||||
{
|
|
||||||
struct prison *pr;
|
|
||||||
int error;
|
|
||||||
|
|
||||||
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
||||||
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
|
||||||
|
|
||||||
pr = cred->cr_prison;
|
|
||||||
if (!(pr->pr_flags & PR_IP6))
|
|
||||||
return (0);
|
|
||||||
mtx_lock(&pr->pr_mtx);
|
|
||||||
if (!(pr->pr_flags & PR_IP6)) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
if (pr->pr_ip6 == NULL) {
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (EAFNOSUPPORT);
|
|
||||||
}
|
|
||||||
|
|
||||||
error = _prison_check_ip6(pr, ia6);
|
|
||||||
mtx_unlock(&pr->pr_mtx);
|
|
||||||
return (error);
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Check if a jail supports the given address family.
|
* Check if a jail supports the given address family.
|
||||||
*
|
*
|
||||||
|
|||||||
432
sys/netinet/in_jail.c
Normal file
432
sys/netinet/in_jail.c
Normal file
@ -0,0 +1,432 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 1999 Poul-Henning Kamp.
|
||||||
|
* Copyright (c) 2008 Bjoern A. Zeeb.
|
||||||
|
* Copyright (c) 2009 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <sys/cdefs.h>
|
||||||
|
__FBSDID("$FreeBSD$");
|
||||||
|
|
||||||
|
#include "opt_compat.h"
|
||||||
|
#include "opt_ddb.h"
|
||||||
|
#include "opt_inet.h"
|
||||||
|
#include "opt_inet6.h"
|
||||||
|
|
||||||
|
#include <sys/param.h>
|
||||||
|
#include <sys/types.h>
|
||||||
|
#include <sys/kernel.h>
|
||||||
|
#include <sys/systm.h>
|
||||||
|
#include <sys/errno.h>
|
||||||
|
#include <sys/sysproto.h>
|
||||||
|
#include <sys/malloc.h>
|
||||||
|
#include <sys/osd.h>
|
||||||
|
#include <sys/priv.h>
|
||||||
|
#include <sys/proc.h>
|
||||||
|
#include <sys/taskqueue.h>
|
||||||
|
#include <sys/fcntl.h>
|
||||||
|
#include <sys/jail.h>
|
||||||
|
#include <sys/lock.h>
|
||||||
|
#include <sys/mutex.h>
|
||||||
|
#include <sys/racct.h>
|
||||||
|
#include <sys/refcount.h>
|
||||||
|
#include <sys/sx.h>
|
||||||
|
#include <sys/sysent.h>
|
||||||
|
#include <sys/namei.h>
|
||||||
|
#include <sys/mount.h>
|
||||||
|
#include <sys/queue.h>
|
||||||
|
#include <sys/socket.h>
|
||||||
|
#include <sys/syscallsubr.h>
|
||||||
|
#include <sys/sysctl.h>
|
||||||
|
#include <sys/vnode.h>
|
||||||
|
|
||||||
|
#include <net/if.h>
|
||||||
|
#include <net/vnet.h>
|
||||||
|
|
||||||
|
#include <netinet/in.h>
|
||||||
|
|
||||||
|
int
|
||||||
|
prison_qcmp_v4(const void *ip1, const void *ip2)
|
||||||
|
{
|
||||||
|
in_addr_t iaa, iab;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* We need to compare in HBO here to get the list sorted as expected
|
||||||
|
* by the result of the code. Sorting NBO addresses gives you
|
||||||
|
* interesting results. If you do not understand, do not try.
|
||||||
|
*/
|
||||||
|
iaa = ntohl(((const struct in_addr *)ip1)->s_addr);
|
||||||
|
iab = ntohl(((const struct in_addr *)ip2)->s_addr);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Do not simply return the difference of the two numbers, the int is
|
||||||
|
* not wide enough.
|
||||||
|
*/
|
||||||
|
if (iaa > iab)
|
||||||
|
return (1);
|
||||||
|
else if (iaa < iab)
|
||||||
|
return (-1);
|
||||||
|
else
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Restrict a prison's IP address list with its parent's, possibly replacing
|
||||||
|
* it. Return true if the replacement buffer was used (or would have been).
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_restrict_ip4(struct prison *pr, struct in_addr *newip4)
|
||||||
|
{
|
||||||
|
int ii, ij, used;
|
||||||
|
struct prison *ppr;
|
||||||
|
|
||||||
|
ppr = pr->pr_parent;
|
||||||
|
if (!(pr->pr_flags & PR_IP4_USER)) {
|
||||||
|
/* This has no user settings, so just copy the parent's list. */
|
||||||
|
if (pr->pr_ip4s < ppr->pr_ip4s) {
|
||||||
|
/*
|
||||||
|
* There's no room for the parent's list. Use the
|
||||||
|
* new list buffer, which is assumed to be big enough
|
||||||
|
* (if it was passed). If there's no buffer, try to
|
||||||
|
* allocate one.
|
||||||
|
*/
|
||||||
|
used = 1;
|
||||||
|
if (newip4 == NULL) {
|
||||||
|
newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4),
|
||||||
|
M_PRISON, M_NOWAIT);
|
||||||
|
if (newip4 != NULL)
|
||||||
|
used = 0;
|
||||||
|
}
|
||||||
|
if (newip4 != NULL) {
|
||||||
|
bcopy(ppr->pr_ip4, newip4,
|
||||||
|
ppr->pr_ip4s * sizeof(*newip4));
|
||||||
|
free(pr->pr_ip4, M_PRISON);
|
||||||
|
pr->pr_ip4 = newip4;
|
||||||
|
pr->pr_ip4s = ppr->pr_ip4s;
|
||||||
|
}
|
||||||
|
return (used);
|
||||||
|
}
|
||||||
|
pr->pr_ip4s = ppr->pr_ip4s;
|
||||||
|
if (pr->pr_ip4s > 0)
|
||||||
|
bcopy(ppr->pr_ip4, pr->pr_ip4,
|
||||||
|
pr->pr_ip4s * sizeof(*newip4));
|
||||||
|
else if (pr->pr_ip4 != NULL) {
|
||||||
|
free(pr->pr_ip4, M_PRISON);
|
||||||
|
pr->pr_ip4 = NULL;
|
||||||
|
}
|
||||||
|
} else if (pr->pr_ip4s > 0) {
|
||||||
|
/* Remove addresses that aren't in the parent. */
|
||||||
|
for (ij = 0; ij < ppr->pr_ip4s; ij++)
|
||||||
|
if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr)
|
||||||
|
break;
|
||||||
|
if (ij < ppr->pr_ip4s)
|
||||||
|
ii = 1;
|
||||||
|
else {
|
||||||
|
bcopy(pr->pr_ip4 + 1, pr->pr_ip4,
|
||||||
|
--pr->pr_ip4s * sizeof(*pr->pr_ip4));
|
||||||
|
ii = 0;
|
||||||
|
}
|
||||||
|
for (ij = 1; ii < pr->pr_ip4s; ) {
|
||||||
|
if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) {
|
||||||
|
ii++;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
switch (ij >= ppr->pr_ip4s ? -1 :
|
||||||
|
prison_qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) {
|
||||||
|
case -1:
|
||||||
|
bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii,
|
||||||
|
(--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4));
|
||||||
|
break;
|
||||||
|
case 0:
|
||||||
|
ii++;
|
||||||
|
ij++;
|
||||||
|
break;
|
||||||
|
case 1:
|
||||||
|
ij++;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (pr->pr_ip4s == 0) {
|
||||||
|
free(pr->pr_ip4, M_PRISON);
|
||||||
|
pr->pr_ip4 = NULL;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Pass back primary IPv4 address of this jail.
|
||||||
|
*
|
||||||
|
* If not restricted return success but do not alter the address. Caller has
|
||||||
|
* to make sure to initialize it correctly (e.g. INADDR_ANY).
|
||||||
|
*
|
||||||
|
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4.
|
||||||
|
* Address returned in NBO.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_get_ip4(struct ucred *cred, struct in_addr *ia)
|
||||||
|
{
|
||||||
|
struct prison *pr;
|
||||||
|
|
||||||
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
||||||
|
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
||||||
|
|
||||||
|
pr = cred->cr_prison;
|
||||||
|
if (!(pr->pr_flags & PR_IP4))
|
||||||
|
return (0);
|
||||||
|
mtx_lock(&pr->pr_mtx);
|
||||||
|
if (!(pr->pr_flags & PR_IP4)) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
if (pr->pr_ip4 == NULL) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (EAFNOSUPPORT);
|
||||||
|
}
|
||||||
|
|
||||||
|
ia->s_addr = pr->pr_ip4[0].s_addr;
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Return 1 if we should do proper source address selection or are not jailed.
|
||||||
|
* We will return 0 if we should bypass source address selection in favour
|
||||||
|
* of the primary jail IPv4 address. Only in this case *ia will be updated and
|
||||||
|
* returned in NBO.
|
||||||
|
* Return EAFNOSUPPORT, in case this jail does not allow IPv4.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia)
|
||||||
|
{
|
||||||
|
struct prison *pr;
|
||||||
|
struct in_addr lia;
|
||||||
|
int error;
|
||||||
|
|
||||||
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
||||||
|
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
||||||
|
|
||||||
|
if (!jailed(cred))
|
||||||
|
return (1);
|
||||||
|
|
||||||
|
pr = cred->cr_prison;
|
||||||
|
if (pr->pr_flags & PR_IP4_SADDRSEL)
|
||||||
|
return (1);
|
||||||
|
|
||||||
|
lia.s_addr = INADDR_ANY;
|
||||||
|
error = prison_get_ip4(cred, &lia);
|
||||||
|
if (error)
|
||||||
|
return (error);
|
||||||
|
if (lia.s_addr == INADDR_ANY)
|
||||||
|
return (1);
|
||||||
|
|
||||||
|
ia->s_addr = lia.s_addr;
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Return true if pr1 and pr2 have the same IPv4 address restrictions.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_equal_ip4(struct prison *pr1, struct prison *pr2)
|
||||||
|
{
|
||||||
|
|
||||||
|
if (pr1 == pr2)
|
||||||
|
return (1);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* No need to lock since the PR_IP4_USER flag can't be altered for
|
||||||
|
* existing prisons.
|
||||||
|
*/
|
||||||
|
while (pr1 != &prison0 &&
|
||||||
|
#ifdef VIMAGE
|
||||||
|
!(pr1->pr_flags & PR_VNET) &&
|
||||||
|
#endif
|
||||||
|
!(pr1->pr_flags & PR_IP4_USER))
|
||||||
|
pr1 = pr1->pr_parent;
|
||||||
|
while (pr2 != &prison0 &&
|
||||||
|
#ifdef VIMAGE
|
||||||
|
!(pr2->pr_flags & PR_VNET) &&
|
||||||
|
#endif
|
||||||
|
!(pr2->pr_flags & PR_IP4_USER))
|
||||||
|
pr2 = pr2->pr_parent;
|
||||||
|
return (pr1 == pr2);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Make sure our (source) address is set to something meaningful to this
|
||||||
|
* jail.
|
||||||
|
*
|
||||||
|
* Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail,
|
||||||
|
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
||||||
|
* doesn't allow IPv4. Address passed in in NBO and returned in NBO.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_local_ip4(struct ucred *cred, struct in_addr *ia)
|
||||||
|
{
|
||||||
|
struct prison *pr;
|
||||||
|
struct in_addr ia0;
|
||||||
|
int error;
|
||||||
|
|
||||||
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
||||||
|
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
||||||
|
|
||||||
|
pr = cred->cr_prison;
|
||||||
|
if (!(pr->pr_flags & PR_IP4))
|
||||||
|
return (0);
|
||||||
|
mtx_lock(&pr->pr_mtx);
|
||||||
|
if (!(pr->pr_flags & PR_IP4)) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
if (pr->pr_ip4 == NULL) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (EAFNOSUPPORT);
|
||||||
|
}
|
||||||
|
|
||||||
|
ia0.s_addr = ntohl(ia->s_addr);
|
||||||
|
if (ia0.s_addr == INADDR_LOOPBACK) {
|
||||||
|
ia->s_addr = pr->pr_ip4[0].s_addr;
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ia0.s_addr == INADDR_ANY) {
|
||||||
|
/*
|
||||||
|
* In case there is only 1 IPv4 address, bind directly.
|
||||||
|
*/
|
||||||
|
if (pr->pr_ip4s == 1)
|
||||||
|
ia->s_addr = pr->pr_ip4[0].s_addr;
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
error = prison_check_ip4_locked(pr, ia);
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Rewrite destination address in case we will connect to loopback address.
|
||||||
|
*
|
||||||
|
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4.
|
||||||
|
* Address passed in in NBO and returned in NBO.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_remote_ip4(struct ucred *cred, struct in_addr *ia)
|
||||||
|
{
|
||||||
|
struct prison *pr;
|
||||||
|
|
||||||
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
||||||
|
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
||||||
|
|
||||||
|
pr = cred->cr_prison;
|
||||||
|
if (!(pr->pr_flags & PR_IP4))
|
||||||
|
return (0);
|
||||||
|
mtx_lock(&pr->pr_mtx);
|
||||||
|
if (!(pr->pr_flags & PR_IP4)) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
if (pr->pr_ip4 == NULL) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (EAFNOSUPPORT);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ntohl(ia->s_addr) == INADDR_LOOPBACK) {
|
||||||
|
ia->s_addr = pr->pr_ip4[0].s_addr;
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Return success because nothing had to be changed.
|
||||||
|
*/
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Check if given address belongs to the jail referenced by cred/prison.
|
||||||
|
*
|
||||||
|
* Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail,
|
||||||
|
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
||||||
|
* doesn't allow IPv4. Address passed in in NBO.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_check_ip4_locked(const struct prison *pr, const struct in_addr *ia)
|
||||||
|
{
|
||||||
|
int i, a, z, d;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Check the primary IP.
|
||||||
|
*/
|
||||||
|
if (pr->pr_ip4[0].s_addr == ia->s_addr)
|
||||||
|
return (0);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* All the other IPs are sorted so we can do a binary search.
|
||||||
|
*/
|
||||||
|
a = 0;
|
||||||
|
z = pr->pr_ip4s - 2;
|
||||||
|
while (a <= z) {
|
||||||
|
i = (a + z) / 2;
|
||||||
|
d = prison_qcmp_v4(&pr->pr_ip4[i+1], ia);
|
||||||
|
if (d > 0)
|
||||||
|
z = i - 1;
|
||||||
|
else if (d < 0)
|
||||||
|
a = i + 1;
|
||||||
|
else
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
return (EADDRNOTAVAIL);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
prison_check_ip4(const struct ucred *cred, const struct in_addr *ia)
|
||||||
|
{
|
||||||
|
struct prison *pr;
|
||||||
|
int error;
|
||||||
|
|
||||||
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
||||||
|
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
||||||
|
|
||||||
|
pr = cred->cr_prison;
|
||||||
|
if (!(pr->pr_flags & PR_IP4))
|
||||||
|
return (0);
|
||||||
|
mtx_lock(&pr->pr_mtx);
|
||||||
|
if (!(pr->pr_flags & PR_IP4)) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
if (pr->pr_ip4 == NULL) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (EAFNOSUPPORT);
|
||||||
|
}
|
||||||
|
|
||||||
|
error = prison_check_ip4_locked(pr, ia);
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
419
sys/netinet6/in6_jail.c
Normal file
419
sys/netinet6/in6_jail.c
Normal file
@ -0,0 +1,419 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 1999 Poul-Henning Kamp.
|
||||||
|
* Copyright (c) 2008 Bjoern A. Zeeb.
|
||||||
|
* Copyright (c) 2009 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <sys/cdefs.h>
|
||||||
|
__FBSDID("$FreeBSD$");
|
||||||
|
|
||||||
|
#include "opt_compat.h"
|
||||||
|
#include "opt_ddb.h"
|
||||||
|
#include "opt_inet.h"
|
||||||
|
#include "opt_inet6.h"
|
||||||
|
|
||||||
|
#include <sys/param.h>
|
||||||
|
#include <sys/types.h>
|
||||||
|
#include <sys/kernel.h>
|
||||||
|
#include <sys/systm.h>
|
||||||
|
#include <sys/errno.h>
|
||||||
|
#include <sys/sysproto.h>
|
||||||
|
#include <sys/malloc.h>
|
||||||
|
#include <sys/osd.h>
|
||||||
|
#include <sys/priv.h>
|
||||||
|
#include <sys/proc.h>
|
||||||
|
#include <sys/taskqueue.h>
|
||||||
|
#include <sys/fcntl.h>
|
||||||
|
#include <sys/jail.h>
|
||||||
|
#include <sys/lock.h>
|
||||||
|
#include <sys/mutex.h>
|
||||||
|
#include <sys/racct.h>
|
||||||
|
#include <sys/refcount.h>
|
||||||
|
#include <sys/sx.h>
|
||||||
|
#include <sys/sysent.h>
|
||||||
|
#include <sys/namei.h>
|
||||||
|
#include <sys/mount.h>
|
||||||
|
#include <sys/queue.h>
|
||||||
|
#include <sys/socket.h>
|
||||||
|
#include <sys/syscallsubr.h>
|
||||||
|
#include <sys/sysctl.h>
|
||||||
|
#include <sys/vnode.h>
|
||||||
|
|
||||||
|
#include <net/if.h>
|
||||||
|
#include <net/vnet.h>
|
||||||
|
|
||||||
|
#include <netinet/in.h>
|
||||||
|
|
||||||
|
int
|
||||||
|
prison_qcmp_v6(const void *ip1, const void *ip2)
|
||||||
|
{
|
||||||
|
const struct in6_addr *ia6a, *ia6b;
|
||||||
|
int i, rc;
|
||||||
|
|
||||||
|
ia6a = (const struct in6_addr *)ip1;
|
||||||
|
ia6b = (const struct in6_addr *)ip2;
|
||||||
|
|
||||||
|
rc = 0;
|
||||||
|
for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) {
|
||||||
|
if (ia6a->s6_addr[i] > ia6b->s6_addr[i])
|
||||||
|
rc = 1;
|
||||||
|
else if (ia6a->s6_addr[i] < ia6b->s6_addr[i])
|
||||||
|
rc = -1;
|
||||||
|
}
|
||||||
|
return (rc);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6)
|
||||||
|
{
|
||||||
|
int ii, ij, used;
|
||||||
|
struct prison *ppr;
|
||||||
|
|
||||||
|
ppr = pr->pr_parent;
|
||||||
|
if (!(pr->pr_flags & PR_IP6_USER)) {
|
||||||
|
/* This has no user settings, so just copy the parent's list. */
|
||||||
|
if (pr->pr_ip6s < ppr->pr_ip6s) {
|
||||||
|
/*
|
||||||
|
* There's no room for the parent's list. Use the
|
||||||
|
* new list buffer, which is assumed to be big enough
|
||||||
|
* (if it was passed). If there's no buffer, try to
|
||||||
|
* allocate one.
|
||||||
|
*/
|
||||||
|
used = 1;
|
||||||
|
if (newip6 == NULL) {
|
||||||
|
newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6),
|
||||||
|
M_PRISON, M_NOWAIT);
|
||||||
|
if (newip6 != NULL)
|
||||||
|
used = 0;
|
||||||
|
}
|
||||||
|
if (newip6 != NULL) {
|
||||||
|
bcopy(ppr->pr_ip6, newip6,
|
||||||
|
ppr->pr_ip6s * sizeof(*newip6));
|
||||||
|
free(pr->pr_ip6, M_PRISON);
|
||||||
|
pr->pr_ip6 = newip6;
|
||||||
|
pr->pr_ip6s = ppr->pr_ip6s;
|
||||||
|
}
|
||||||
|
return (used);
|
||||||
|
}
|
||||||
|
pr->pr_ip6s = ppr->pr_ip6s;
|
||||||
|
if (pr->pr_ip6s > 0)
|
||||||
|
bcopy(ppr->pr_ip6, pr->pr_ip6,
|
||||||
|
pr->pr_ip6s * sizeof(*newip6));
|
||||||
|
else if (pr->pr_ip6 != NULL) {
|
||||||
|
free(pr->pr_ip6, M_PRISON);
|
||||||
|
pr->pr_ip6 = NULL;
|
||||||
|
}
|
||||||
|
} else if (pr->pr_ip6s > 0) {
|
||||||
|
/* Remove addresses that aren't in the parent. */
|
||||||
|
for (ij = 0; ij < ppr->pr_ip6s; ij++)
|
||||||
|
if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0],
|
||||||
|
&ppr->pr_ip6[ij]))
|
||||||
|
break;
|
||||||
|
if (ij < ppr->pr_ip6s)
|
||||||
|
ii = 1;
|
||||||
|
else {
|
||||||
|
bcopy(pr->pr_ip6 + 1, pr->pr_ip6,
|
||||||
|
--pr->pr_ip6s * sizeof(*pr->pr_ip6));
|
||||||
|
ii = 0;
|
||||||
|
}
|
||||||
|
for (ij = 1; ii < pr->pr_ip6s; ) {
|
||||||
|
if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii],
|
||||||
|
&ppr->pr_ip6[0])) {
|
||||||
|
ii++;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
switch (ij >= ppr->pr_ip6s ? -1 :
|
||||||
|
prison_qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) {
|
||||||
|
case -1:
|
||||||
|
bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii,
|
||||||
|
(--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6));
|
||||||
|
break;
|
||||||
|
case 0:
|
||||||
|
ii++;
|
||||||
|
ij++;
|
||||||
|
break;
|
||||||
|
case 1:
|
||||||
|
ij++;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (pr->pr_ip6s == 0) {
|
||||||
|
free(pr->pr_ip6, M_PRISON);
|
||||||
|
pr->pr_ip6 = NULL;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Pass back primary IPv6 address for this jail.
|
||||||
|
*
|
||||||
|
* If not restricted return success but do not alter the address. Caller has
|
||||||
|
* to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT).
|
||||||
|
*
|
||||||
|
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_get_ip6(struct ucred *cred, struct in6_addr *ia6)
|
||||||
|
{
|
||||||
|
struct prison *pr;
|
||||||
|
|
||||||
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
||||||
|
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
||||||
|
|
||||||
|
pr = cred->cr_prison;
|
||||||
|
if (!(pr->pr_flags & PR_IP6))
|
||||||
|
return (0);
|
||||||
|
mtx_lock(&pr->pr_mtx);
|
||||||
|
if (!(pr->pr_flags & PR_IP6)) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
if (pr->pr_ip6 == NULL) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (EAFNOSUPPORT);
|
||||||
|
}
|
||||||
|
|
||||||
|
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Return 1 if we should do proper source address selection or are not jailed.
|
||||||
|
* We will return 0 if we should bypass source address selection in favour
|
||||||
|
* of the primary jail IPv6 address. Only in this case *ia will be updated and
|
||||||
|
* returned in NBO.
|
||||||
|
* Return EAFNOSUPPORT, in case this jail does not allow IPv6.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6)
|
||||||
|
{
|
||||||
|
struct prison *pr;
|
||||||
|
struct in6_addr lia6;
|
||||||
|
int error;
|
||||||
|
|
||||||
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
||||||
|
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
||||||
|
|
||||||
|
if (!jailed(cred))
|
||||||
|
return (1);
|
||||||
|
|
||||||
|
pr = cred->cr_prison;
|
||||||
|
if (pr->pr_flags & PR_IP6_SADDRSEL)
|
||||||
|
return (1);
|
||||||
|
|
||||||
|
lia6 = in6addr_any;
|
||||||
|
error = prison_get_ip6(cred, &lia6);
|
||||||
|
if (error)
|
||||||
|
return (error);
|
||||||
|
if (IN6_IS_ADDR_UNSPECIFIED(&lia6))
|
||||||
|
return (1);
|
||||||
|
|
||||||
|
bcopy(&lia6, ia6, sizeof(struct in6_addr));
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Return true if pr1 and pr2 have the same IPv6 address restrictions.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_equal_ip6(struct prison *pr1, struct prison *pr2)
|
||||||
|
{
|
||||||
|
|
||||||
|
if (pr1 == pr2)
|
||||||
|
return (1);
|
||||||
|
|
||||||
|
while (pr1 != &prison0 &&
|
||||||
|
#ifdef VIMAGE
|
||||||
|
!(pr1->pr_flags & PR_VNET) &&
|
||||||
|
#endif
|
||||||
|
!(pr1->pr_flags & PR_IP6_USER))
|
||||||
|
pr1 = pr1->pr_parent;
|
||||||
|
while (pr2 != &prison0 &&
|
||||||
|
#ifdef VIMAGE
|
||||||
|
!(pr2->pr_flags & PR_VNET) &&
|
||||||
|
#endif
|
||||||
|
!(pr2->pr_flags & PR_IP6_USER))
|
||||||
|
pr2 = pr2->pr_parent;
|
||||||
|
return (pr1 == pr2);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Make sure our (source) address is set to something meaningful to this jail.
|
||||||
|
*
|
||||||
|
* v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0)
|
||||||
|
* when needed while binding.
|
||||||
|
*
|
||||||
|
* Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail,
|
||||||
|
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
||||||
|
* doesn't allow IPv6.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only)
|
||||||
|
{
|
||||||
|
struct prison *pr;
|
||||||
|
int error;
|
||||||
|
|
||||||
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
||||||
|
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
||||||
|
|
||||||
|
pr = cred->cr_prison;
|
||||||
|
if (!(pr->pr_flags & PR_IP6))
|
||||||
|
return (0);
|
||||||
|
mtx_lock(&pr->pr_mtx);
|
||||||
|
if (!(pr->pr_flags & PR_IP6)) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
if (pr->pr_ip6 == NULL) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (EAFNOSUPPORT);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (IN6_IS_ADDR_LOOPBACK(ia6)) {
|
||||||
|
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (IN6_IS_ADDR_UNSPECIFIED(ia6)) {
|
||||||
|
/*
|
||||||
|
* In case there is only 1 IPv6 address, and v6only is true,
|
||||||
|
* then bind directly.
|
||||||
|
*/
|
||||||
|
if (v6only != 0 && pr->pr_ip6s == 1)
|
||||||
|
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
error = prison_check_ip6_locked(pr, ia6);
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Rewrite destination address in case we will connect to loopback address.
|
||||||
|
*
|
||||||
|
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_remote_ip6(struct ucred *cred, struct in6_addr *ia6)
|
||||||
|
{
|
||||||
|
struct prison *pr;
|
||||||
|
|
||||||
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
||||||
|
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
||||||
|
|
||||||
|
pr = cred->cr_prison;
|
||||||
|
if (!(pr->pr_flags & PR_IP6))
|
||||||
|
return (0);
|
||||||
|
mtx_lock(&pr->pr_mtx);
|
||||||
|
if (!(pr->pr_flags & PR_IP6)) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
if (pr->pr_ip6 == NULL) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (EAFNOSUPPORT);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (IN6_IS_ADDR_LOOPBACK(ia6)) {
|
||||||
|
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Return success because nothing had to be changed.
|
||||||
|
*/
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Check if given address belongs to the jail referenced by cred/prison.
|
||||||
|
*
|
||||||
|
* Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail,
|
||||||
|
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
||||||
|
* doesn't allow IPv6.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
prison_check_ip6_locked(const struct prison *pr, const struct in6_addr *ia6)
|
||||||
|
{
|
||||||
|
int i, a, z, d;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Check the primary IP.
|
||||||
|
*/
|
||||||
|
if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6))
|
||||||
|
return (0);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* All the other IPs are sorted so we can do a binary search.
|
||||||
|
*/
|
||||||
|
a = 0;
|
||||||
|
z = pr->pr_ip6s - 2;
|
||||||
|
while (a <= z) {
|
||||||
|
i = (a + z) / 2;
|
||||||
|
d = prison_qcmp_v6(&pr->pr_ip6[i+1], ia6);
|
||||||
|
if (d > 0)
|
||||||
|
z = i - 1;
|
||||||
|
else if (d < 0)
|
||||||
|
a = i + 1;
|
||||||
|
else
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
return (EADDRNOTAVAIL);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
prison_check_ip6(const struct ucred *cred, const struct in6_addr *ia6)
|
||||||
|
{
|
||||||
|
struct prison *pr;
|
||||||
|
int error;
|
||||||
|
|
||||||
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
||||||
|
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
||||||
|
|
||||||
|
pr = cred->cr_prison;
|
||||||
|
if (!(pr->pr_flags & PR_IP6))
|
||||||
|
return (0);
|
||||||
|
mtx_lock(&pr->pr_mtx);
|
||||||
|
if (!(pr->pr_flags & PR_IP6)) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
if (pr->pr_ip6 == NULL) {
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (EAFNOSUPPORT);
|
||||||
|
}
|
||||||
|
|
||||||
|
error = prison_check_ip6_locked(pr, ia6);
|
||||||
|
mtx_unlock(&pr->pr_mtx);
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
@ -389,14 +389,20 @@ int prison_get_ip4(struct ucred *cred, struct in_addr *ia);
|
|||||||
int prison_local_ip4(struct ucred *cred, struct in_addr *ia);
|
int prison_local_ip4(struct ucred *cred, struct in_addr *ia);
|
||||||
int prison_remote_ip4(struct ucred *cred, struct in_addr *ia);
|
int prison_remote_ip4(struct ucred *cred, struct in_addr *ia);
|
||||||
int prison_check_ip4(const struct ucred *, const struct in_addr *);
|
int prison_check_ip4(const struct ucred *, const struct in_addr *);
|
||||||
|
int prison_check_ip4_locked(const struct prison *, const struct in_addr *);
|
||||||
int prison_saddrsel_ip4(struct ucred *, struct in_addr *);
|
int prison_saddrsel_ip4(struct ucred *, struct in_addr *);
|
||||||
|
int prison_restrict_ip4(struct prison *, struct in_addr *);
|
||||||
|
int prison_qcmp_v4(const void *, const void *);
|
||||||
#ifdef INET6
|
#ifdef INET6
|
||||||
int prison_equal_ip6(struct prison *, struct prison *);
|
int prison_equal_ip6(struct prison *, struct prison *);
|
||||||
int prison_get_ip6(struct ucred *, struct in6_addr *);
|
int prison_get_ip6(struct ucred *, struct in6_addr *);
|
||||||
int prison_local_ip6(struct ucred *, struct in6_addr *, int);
|
int prison_local_ip6(struct ucred *, struct in6_addr *, int);
|
||||||
int prison_remote_ip6(struct ucred *, struct in6_addr *);
|
int prison_remote_ip6(struct ucred *, struct in6_addr *);
|
||||||
int prison_check_ip6(struct ucred *, struct in6_addr *);
|
int prison_check_ip6(const struct ucred *, const struct in6_addr *);
|
||||||
|
int prison_check_ip6_locked(const struct prison *, const struct in6_addr *);
|
||||||
int prison_saddrsel_ip6(struct ucred *, struct in6_addr *);
|
int prison_saddrsel_ip6(struct ucred *, struct in6_addr *);
|
||||||
|
int prison_restrict_ip6(struct prison *, struct in6_addr *);
|
||||||
|
int prison_qcmp_v6(const void *, const void *);
|
||||||
#endif
|
#endif
|
||||||
int prison_check_af(struct ucred *cred, int af);
|
int prison_check_af(struct ucred *cred, int af);
|
||||||
int prison_if(struct ucred *cred, struct sockaddr *sa);
|
int prison_if(struct ucred *cred, struct sockaddr *sa);
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user