xnu-1699.22.73.tar.gz

[apple/xnu.git] / bsd / netinet6 / udp6_output.c

diff --git a/bsd/netinet6/udp6_output.c b/bsd/netinet6/udp6_output.c
index e3d3198f460ac30f2727fcda94f8aeb44a1cf567..0fb9a6993a70bb6a8d1da2d8b270f917ebd7137e 100644 (file)
--- a/bsd/netinet6/udp6_output.c
+++ b/bsd/netinet6/udp6_output.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008-2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -107,9 +107,12 @@
 #include <sys/proc.h>
 #include <sys/syslog.h>
 
+#include <machine/endian.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_var.h>
@@ -177,27 +180,28 @@ udp6_output(in6p, m, addr6, control, p)
        struct in6_addr *laddr, *faddr;
        u_short fport;
        int error = 0;
-       struct ip6_pktopts opt, *stickyopt = in6p->in6p_outputopts;
-       int priv;
+       struct ip6_pktopts opt, *optp = NULL;
+       struct ip6_moptions *im6o;
        int af = AF_INET6, hlen = sizeof(struct ip6_hdr);
        int flags;
        struct sockaddr_in6 tmp;
        struct  in6_addr storage;
-#if PKT_PRIORITY
-       mbuf_traffic_class_t mtc = MBUF_TC_NONE;
-#endif /* PKT_PRIORITY */
+       mbuf_traffic_class_t mtc = MBUF_TC_UNSPEC;
+       struct ip6_out_args ip6oa = { IFSCOPE_NONE, 0 };
+
+       if (in6p->inp_flags & INP_BOUND_IF)
+               ip6oa.ip6oa_boundif = in6p->inp_boundif;
 
-       priv = (proc_suser(p) == 0);
+       ip6oa.ip6oa_nocell = (in6p->inp_flags & INP_NO_IFT_CELLULAR) ? 1 : 0;
 
        if (control) {
-#if PKT_PRIORITY
                mtc = mbuf_traffic_class_from_control(control);
-#endif /* PKT_PRIORITY */
 
-               if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0)
+               if ((error = ip6_setpktopts(control, &opt, NULL, IPPROTO_UDP)) != 0)
                        goto release;
-               in6p->in6p_outputopts = &opt;
-       }
+               optp = &opt;
+       } else
+               optp = in6p->in6p_outputopts;
 
        if (addr6) {
                /*
@@ -246,16 +250,16 @@ udp6_output(in6p, m, addr6, control, p)
                }
 
                /* KAME hack: embed scopeid */
-               if (in6_embedscope(&sin6->sin6_addr, sin6, in6p, NULL) != 0) {
+               if (in6_embedscope(&sin6->sin6_addr, sin6, in6p, NULL,
+                   optp) != 0) {
                        error = EINVAL;
                        goto release;
                }
 
                if (!IN6_IS_ADDR_V4MAPPED(faddr)) {
-                       laddr = in6_selectsrc(sin6, in6p->in6p_outputopts,
-                                             in6p->in6p_moptions,
-                                             &in6p->in6p_route,
-                                             &in6p->in6p_laddr, &storage, &error);
+                       laddr = in6_selectsrc(sin6, optp,
+                           in6p, &in6p->in6p_route, NULL, &storage,
+                           ip6oa.ip6oa_boundif, &error);
                } else
                        laddr = &in6p->in6p_laddr;      /* XXX */
                if (laddr == NULL) {
@@ -333,12 +337,12 @@ udp6_output(in6p, m, addr6, control, p)
                ip6->ip6_src    = *laddr;
                ip6->ip6_dst    = *faddr;
 
-               if ((udp6->uh_sum = in6_cksum(m, IPPROTO_UDP,
-                               sizeof(struct ip6_hdr), plen)) == 0) {
-                       udp6->uh_sum = 0xffff;
-               }
+               udp6->uh_sum = in6_cksum_phdr(laddr, faddr,
+                   htonl(plen), htonl(IPPROTO_UDP));
+               m->m_pkthdr.csum_flags = CSUM_UDPIPV6;
+               m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
 
-               flags = 0;
+               flags = IPV6_OUTARGS;
 
                udp6stat.udp6s_opackets++;
 #ifdef IPSEC
@@ -348,26 +352,50 @@ udp6_output(in6p, m, addr6, control, p)
                }
 #endif /*IPSEC*/
                m->m_pkthdr.socket_id = get_socket_id(in6p->in6p_socket);
+
+               set_packet_tclass(m, in6p->in6p_socket, mtc, 1);
+
+               im6o = in6p->in6p_moptions;
+               if (im6o != NULL)
+                       IM6O_ADDREF(im6o);
+
+               error = ip6_output(m, optp, &in6p->in6p_route,
+                   flags, im6o, NULL, &ip6oa);
+
+               if (im6o != NULL)
+                       IM6O_REMREF(im6o);
                
-#if PKT_PRIORITY
-               set_traffic_class(m, in6p->in6p_socket, mtc);
-#endif /* PKT_PRIORITY */
-               error = ip6_output(m, in6p->in6p_outputopts, &in6p->in6p_route,
-                   flags, in6p->in6p_moptions, NULL, 0);
+               if (error == 0 && nstat_collect) {
+                       locked_add_64(&in6p->inp_stat->txpackets, 1);
+                       locked_add_64(&in6p->inp_stat->txbytes, ulen);
+               }
 
-#if IFNET_ROUTE_REFCNT
-               /*
-                * Always discard the cached route for unconnected socket
-                * or if it is a multicast route.
-                */
-               if (in6p->in6p_route.ro_rt != NULL &&
-                   ((in6p->in6p_route.ro_rt->rt_flags & RTF_MULTICAST) ||
-                   in6p->in6p_socket == NULL ||
-                   in6p->in6p_socket->so_state != SS_ISCONNECTED)) {
-                       rtfree(in6p->in6p_route.ro_rt);
-                       in6p->in6p_route.ro_rt = NULL;
+               if (in6p->in6p_route.ro_rt != NULL) {
+                       struct rtentry *rt = in6p->in6p_route.ro_rt;
+                       unsigned int outif;
+
+                       if ((rt->rt_flags & RTF_MULTICAST) ||
+                           in6p->in6p_socket == NULL ||
+                           !(in6p->in6p_socket->so_state & SS_ISCONNECTED)) {
+                               rt = NULL;      /* unusable */
+                       }
+                       /*
+                        * Always discard the cached route for unconnected
+                        * socket or if it is a multicast route.
+                        */
+                       if (rt == NULL) {
+                               rtfree(in6p->in6p_route.ro_rt);
+                               in6p->in6p_route.ro_rt = NULL;
+                       }
+                       /*
+                        * If this is a connected socket and the destination
+                        * route is not multicast, update outif with that of
+                        * the route interface index used by IP.
+                        */
+                       if (rt != NULL && (outif = rt->rt_ifp->if_index) !=
+                           in6p->in6p_last_outif)
+                               in6p->in6p_last_outif = outif;
                }
-#endif /* IFNET_ROUTE_REFCNT */
                break;
        case AF_INET:
                error = EAFNOSUPPORT;
@@ -380,8 +408,8 @@ release:
 
 releaseopt:
        if (control) {
-               ip6_clearpktopts(in6p->in6p_outputopts, 0, -1);
-               in6p->in6p_outputopts = stickyopt;
+               if (optp == &opt)
+                       ip6_clearpktopts(optp, -1);
                m_freem(control);
        }
        return(error);