xnu-1699.32.7.tar.gz

[apple/xnu.git] / bsd / netinet6 / udp6_usrreq.c

diff --git a/bsd/netinet6/udp6_usrreq.c b/bsd/netinet6/udp6_usrreq.c
index fed294b9020bbc3ea012773688f345be2651a0ba..c88c0d169e0e96b3f6862ebd997873b6cf4d6e01 100644 (file)
--- a/bsd/netinet6/udp6_usrreq.c
+++ b/bsd/netinet6/udp6_usrreq.c
@@ -1,3 +1,31 @@
+/*
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+

 /*     $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.6 2001/07/29 19:32:40 ume Exp $        */
 /*     $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $    */
 
 /*     $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.6 2001/07/29 19:32:40 ume Exp $        */
 /*     $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $    */
 


@@ -83,6 +111,7 @@
 #include <net/if.h>
 #include <net/route.h>
 #include <net/if_types.h>
 #include <net/if.h>
 #include <net/route.h>
 #include <net/if_types.h>

+#include <net/ntstat.h>

 
 #include <netinet/in.h>
 #include <netinet/in_systm.h>
 
 #include <netinet/in.h>
 #include <netinet/in_systm.h>


@@ -104,7 +133,6 @@
 #include <netinet6/ipsec6.h>
 extern int ipsec_bypass;
 #endif /*IPSEC*/
 #include <netinet6/ipsec6.h>
 extern int ipsec_bypass;
 #endif /*IPSEC*/

-extern lck_mtx_t *nd6_mutex;

 
 /*
  * UDP protocol inplementation.
 
 /*
  * UDP protocol inplementation.


@@ -112,7 +140,6 @@ extern lck_mtx_t *nd6_mutex;
  */
 
 extern struct protosw inetsw[];
  */
 
 extern struct protosw inetsw[];

-static int in6_mcmatch(struct inpcb *, struct in6_addr *, struct ifnet *);

 static int udp6_detach(struct socket *so);
 static void udp6_append(struct inpcb *, struct ip6_hdr *,
     struct sockaddr_in6 *, struct mbuf *, int);
 static int udp6_detach(struct socket *so);
 static void udp6_append(struct inpcb *, struct ip6_hdr *,
     struct sockaddr_in6 *, struct mbuf *, int);


@@ -131,53 +158,37 @@ extern int fw_verbose;
 #define log_in_vain_log( a ) { log a; }
 #endif
 
 #define log_in_vain_log( a ) { log a; }
 #endif
 

-static int
-in6_mcmatch(
-       struct inpcb *in6p,
-       register struct in6_addr *ia6,
-       struct ifnet *ifp)
-{
-       struct ip6_moptions *im6o = in6p->in6p_moptions;
-       struct in6_multi_mship *imm;
-
-       if (im6o == NULL)
-               return 0;
-
-       lck_mtx_lock(nd6_mutex);
-       for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
-            imm = imm->i6mm_chain.le_next) {
-               if ((ifp == NULL ||
-                    imm->i6mm_maddr->in6m_ifp == ifp) &&
-                   IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
-                                      ia6)) {
-                       lck_mtx_unlock(nd6_mutex);
-                       return 1;
-               }
-       }
-       lck_mtx_unlock(nd6_mutex);
-       return 0;
-}
-

 /*
  * subroutine of udp6_input(), mainly for source code readability.
  */
 static void
 /*
  * subroutine of udp6_input(), mainly for source code readability.
  */
 static void

-udp6_append(struct inpcb *last, struct ip6_hdr *ip6,
+udp6_append(struct inpcb *last, __unused struct ip6_hdr *ip6,

     struct sockaddr_in6 *udp_in6, struct mbuf *n, int off)
 {
        struct  mbuf *opts = NULL;
     struct sockaddr_in6 *udp_in6, struct mbuf *n, int off)
 {
        struct  mbuf *opts = NULL;

-
+       int ret = 0;

 #if CONFIG_MACF_NET
        if (mac_inpcb_check_deliver(last, n, AF_INET6, SOCK_DGRAM) != 0) {
                m_freem(n);
                return;
        }
 #endif
 #if CONFIG_MACF_NET
        if (mac_inpcb_check_deliver(last, n, AF_INET6, SOCK_DGRAM) != 0) {
                m_freem(n);
                return;
        }
 #endif

-       if (last->in6p_flags & IN6P_CONTROLOPTS ||
-           last->in6p_socket->so_options & SO_TIMESTAMP)
-               ip6_savecontrol(last, &opts, ip6, n);
-
+       if ((last->in6p_flags & IN6P_CONTROLOPTS) != 0 ||
+           (last->in6p_socket->so_options & SO_TIMESTAMP) != 0 ||
+           (last->in6p_socket->so_options & SO_TIMESTAMP_MONOTONIC) != 0) {
+               ret = ip6_savecontrol(last, n, &opts);
+               if (ret != 0) {
+                       m_freem(n);
+                       m_freem(opts);
+                       return;
+               }
+       }

        m_adj(n, off);
        m_adj(n, off);

+       if (nstat_collect) {
+               locked_add_64(&last->inp_stat->rxpackets, 1);
+               locked_add_64(&last->inp_stat->rxbytes, n->m_pkthdr.len);
+       }
+       so_recv_data_stat(last->in6p_socket, n, 0);

        if (sbappendaddr(&last->in6p_socket->so_rcv,
            (struct sockaddr *)udp_in6, n, opts, NULL) == 0)
                udpstat.udps_fullsock++;
        if (sbappendaddr(&last->in6p_socket->so_rcv,
            (struct sockaddr *)udp_in6, n, opts, NULL) == 0)
                udpstat.udps_fullsock++;


@@ -188,20 +199,25 @@ udp6_append(struct inpcb *last, struct ip6_hdr *ip6,
 int
 udp6_input(
        struct mbuf **mp,
 int
 udp6_input(
        struct mbuf **mp,

-       int *offp)
+       int *offp,
+       int proto)

 {
 {

+#pragma unused(proto)

        struct mbuf *m = *mp;
        struct mbuf *m = *mp;

+       struct ifnet *ifp;

        register struct ip6_hdr *ip6;
        register struct udphdr *uh;
        register struct inpcb *in6p;
        struct  mbuf *opts = NULL;
        int off = *offp;
        register struct ip6_hdr *ip6;
        register struct udphdr *uh;
        register struct inpcb *in6p;
        struct  mbuf *opts = NULL;
        int off = *offp;

-       int plen, ulen;
+       int plen, ulen, ret = 0;

        struct sockaddr_in6 udp_in6;
        struct inpcbinfo *pcbinfo = &udbinfo;
        struct sockaddr_in6 udp_in6;
        struct inpcbinfo *pcbinfo = &udbinfo;

+       struct sockaddr_in6 fromsa;

 
        IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), return IPPROTO_DONE);
 
 
        IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), return IPPROTO_DONE);
 

+       ifp = m->m_pkthdr.rcvif;

        ip6 = mtod(m, struct ip6_hdr *);
 
 #if defined(NFAITH) && 0 < NFAITH
        ip6 = mtod(m, struct ip6_hdr *);
 
 #if defined(NFAITH) && 0 < NFAITH


@@ -223,20 +239,40 @@ udp6_input(
                goto bad;
        }
 
                goto bad;
        }
 

+       /* destination port of 0 is illegal, based on RFC768. */
+       if (uh->uh_dport == 0)
+               goto bad;
+

        /*
         * Checksum extended UDP header and data.
         */
        /*
         * Checksum extended UDP header and data.
         */

+       if (uh->uh_sum) {
+               if ((apple_hwcksum_rx != 0) && (m->m_pkthdr.csum_flags & CSUM_DATA_VALID)) {
+                       uh->uh_sum = m->m_pkthdr.csum_data;
+                       uh->uh_sum ^= 0xffff;
+               }
+               else {
+                       if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
+                               udpstat.udps_badsum++;
+                               goto bad;
+                       }
+               }
+       }

 #ifndef __APPLE__
 #ifndef __APPLE__

-       if (uh->uh_sum == 0)
+       else

                udpstat.udps_nosum++;
 #endif
                udpstat.udps_nosum++;
 #endif

-       else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
-               udpstat.udps_badsum++;
-               goto bad;
-       }
+
+       /*
+        * Construct sockaddr format source address.
+        */
+       init_sin6(&fromsa, m);
+       fromsa.sin6_port = uh->uh_sport;
+

 
        if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
                int reuse_sock = 0, mcast_delivered = 0;
 
        if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
                int reuse_sock = 0, mcast_delivered = 0;

+               struct ip6_moptions *imo;

                struct mbuf *n = NULL;
 
                /*
                struct mbuf *n = NULL;
 
                /*


@@ -299,11 +335,27 @@ udp6_input(
                                udp_unlock(in6p->in6p_socket, 1, 0);
                                continue;
                        }
                                udp_unlock(in6p->in6p_socket, 1, 0);
                                continue;
                        }

-                       if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
-                               if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
-                                                       &ip6->ip6_dst) &&
-                                   !in6_mcmatch(in6p, &ip6->ip6_dst,
-                                                m->m_pkthdr.rcvif)) {
+
+                       /*
+                        * Handle socket delivery policy for any-source
+                        * and source-specific multicast. [RFC3678]
+                        */
+                       imo = in6p->in6p_moptions;
+                       if (imo && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+                               struct sockaddr_in6      mcaddr;
+                               int                      blocked;
+
+                               IM6O_LOCK(imo); 
+                               bzero(&mcaddr, sizeof(struct sockaddr_in6));
+                               mcaddr.sin6_len = sizeof(struct sockaddr_in6);
+                               mcaddr.sin6_family = AF_INET6;
+                               mcaddr.sin6_addr = ip6->ip6_dst;
+
+                               blocked = im6o_mc_filter(imo, ifp,
+                                       (struct sockaddr *)&mcaddr,
+                                       (struct sockaddr *)&fromsa);
+                               IM6O_UNLOCK(imo);       
+                               if (blocked != MCAST_PASS) {

                                        udp_unlock(in6p->in6p_socket, 1, 0);
                                        continue;
                                }
                                        udp_unlock(in6p->in6p_socket, 1, 0);
                                        continue;
                                }


@@ -444,10 +496,21 @@ udp6_input(
                
        init_sin6(&udp_in6, m); /* general init */
        udp_in6.sin6_port = uh->uh_sport;
                
        init_sin6(&udp_in6, m); /* general init */
        udp_in6.sin6_port = uh->uh_sport;

-       if (in6p->in6p_flags & IN6P_CONTROLOPTS
-           || in6p->in6p_socket->so_options & SO_TIMESTAMP)
-               ip6_savecontrol(in6p, &opts, ip6, m);
+       if ((in6p->in6p_flags & IN6P_CONTROLOPTS) != 0 || 
+               (in6p->in6p_socket->so_options & SO_TIMESTAMP) != 0 ||
+               (in6p->in6p_socket->so_options & SO_TIMESTAMP_MONOTONIC) != 0) {
+               ret = ip6_savecontrol(in6p, m, &opts);
+               if (ret != 0) {
+                       udp_unlock(in6p->in6p_socket, 1, 0);
+                       goto bad;
+               }
+       }

        m_adj(m, off + sizeof(struct udphdr));
        m_adj(m, off + sizeof(struct udphdr));

+       if (nstat_collect) {
+               locked_add_64(&in6p->inp_stat->rxpackets, 1);
+               locked_add_64(&in6p->inp_stat->rxbytes, m->m_pkthdr.len);
+       }
+       so_recv_data_stat(in6p->in6p_socket, m, 0);

        if (sbappendaddr(&in6p->in6p_socket->so_rcv,
                        (struct sockaddr *)&udp_in6,
                        m, opts, NULL) == 0) {
        if (sbappendaddr(&in6p->in6p_socket->so_rcv,
                        (struct sockaddr *)&udp_in6,
                        m, opts, NULL) == 0) {


@@ -527,10 +590,10 @@ udp6_ctlinput(
 
                (void) in6_pcbnotify(&udbinfo, sa, uh.uh_dport,
                                        (struct sockaddr*)ip6cp->ip6c_src,
 
                (void) in6_pcbnotify(&udbinfo, sa, uh.uh_dport,
                                        (struct sockaddr*)ip6cp->ip6c_src,

-                                       uh.uh_sport, cmd, notify);
+                                       uh.uh_sport, cmd, NULL, notify);

        } else
                (void) in6_pcbnotify(&udbinfo, sa, 0, (struct sockaddr *)&sa6_src,
        } else
                (void) in6_pcbnotify(&udbinfo, sa, 0, (struct sockaddr *)&sa6_src,

-                                    0, cmd, notify);
+                                    0, cmd, NULL, notify);

 }
 
 #ifndef __APPLE__
 }
 
 #ifndef __APPLE__


@@ -561,6 +624,12 @@ udp6_getcred SYSCTL_HANDLER_ARGS
                error = ENOENT;
                goto out;
        }
                error = ENOENT;
                goto out;
        }

+       /*
+        * XXX This should not be copying out a credential!!!!  This
+        * XXX is an opaque type, and is not intended to be introspected,
+        * XXX and the size of this structure *WILL* change as planned MACF
+        * XXX and kauth changes go forward.
+        */

        error = SYSCTL_OUT(req, inp->inp_socket->so_cred->pc_ucred,
                           sizeof(*(kauth_cred_t)0));
 
        error = SYSCTL_OUT(req, inp->inp_socket->so_cred->pc_ucred,
                           sizeof(*(kauth_cred_t)0));
 


@@ -619,6 +688,7 @@ udp6_attach(struct socket *so, __unused int proto, struct proc *p)
         * which may match an IPv4-mapped IPv6 address.
         */
        inp->inp_ip_ttl = ip_defttl;
         * which may match an IPv4-mapped IPv6 address.
         */
        inp->inp_ip_ttl = ip_defttl;

+       nstat_udp_new_pcb(inp);

        return 0;
 }
 
        return 0;
 }
 


@@ -676,7 +746,7 @@ udp6_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
                        if (inp->inp_faddr.s_addr != INADDR_ANY)
                                return EISCONN;
                        in6_sin6_2_sin(&sin, sin6_p);
                        if (inp->inp_faddr.s_addr != INADDR_ANY)
                                return EISCONN;
                        in6_sin6_2_sin(&sin, sin6_p);

-                       error = in_pcbconnect(inp, (struct sockaddr *)&sin, p);
+                       error = in_pcbconnect(inp, (struct sockaddr *)&sin, p, NULL);

                        if (error == 0) {
                                inp->inp_vflag |= INP_IPV4;
                                inp->inp_vflag &= ~INP_IPV6;
                        if (error == 0) {
                                inp->inp_vflag |= INP_IPV4;
                                inp->inp_vflag &= ~INP_IPV6;


@@ -732,6 +802,7 @@ udp6_disconnect(struct socket *so)
 
        in6_pcbdisconnect(inp);
        inp->in6p_laddr = in6addr_any;
 
        in6_pcbdisconnect(inp);
        inp->in6p_laddr = in6addr_any;

+       inp->in6p_last_outif = 0;

        so->so_state &= ~SS_ISCONNECTED;                /* XXX */
        return 0;
 }
        so->so_state &= ~SS_ISCONNECTED;                /* XXX */
        return 0;
 }