/*
- * Copyright (c) 2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2014 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#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>
#include <netinet/icmp6.h>
#include <netinet6/ip6protosw.h>
-#ifdef IPSEC
-#include <netinet6/ipsec.h>
-#ifdef INET6
-#include <netinet6/ipsec6.h>
-#endif
-extern int ipsec_bypass;
-#endif /*IPSEC*/
-
-#include "faith.h"
+#if NECP
+#include <net/necp.h>
+#endif /* NECP */
#include <net/net_osdep.h>
* Per RFC 768, August, 1980.
*/
-#define in6pcb inpcb
-#define udp6stat udpstat
-#define udp6s_opackets udps_opackets
-
-static __inline__ u_int16_t
-get_socket_id(struct socket * s)
-{
- u_int16_t val;
-
- if (s == NULL) {
- return (0);
- }
- val = (u_int16_t)(((uintptr_t)s) / sizeof(struct socket));
- if (val == 0) {
- val = 0xffff;
- }
- return (val);
-}
-
int
-udp6_output(in6p, m, addr6, control, p)
- struct in6pcb *in6p;
- struct mbuf *m;
- struct mbuf *control;
- struct sockaddr *addr6;
- struct proc *p;
+udp6_output(struct in6pcb *in6p, struct mbuf *m, struct sockaddr *addr6,
+ struct mbuf *control, struct proc *p)
{
u_int32_t ulen = m->m_pkthdr.len;
- u_int32_t plen = sizeof(struct udphdr) + ulen;
+ u_int32_t plen = sizeof (struct udphdr) + ulen;
struct ip6_hdr *ip6;
struct udphdr *udp6;
struct in6_addr *laddr, *faddr;
u_short fport;
int error = 0;
- struct ip6_pktopts opt, *stickyopt = in6p->in6p_outputopts;
- int priv;
- int af = AF_INET6, hlen = sizeof(struct ip6_hdr);
+ 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;
+ mbuf_svc_class_t msc = MBUF_SC_UNSPEC;
+ struct ip6_out_args ip6oa =
+ { IFSCOPE_NONE, { 0 }, IP6OAF_SELECT_SRCIF, 0 };
+ struct flowadv *adv = &ip6oa.ip6oa_flowadv;
+ struct socket *so = in6p->in6p_socket;
+ struct route_in6 ro;
+ int flowadv = 0;
+
+ /* Enable flow advisory only when connected */
+ flowadv = (so->so_state & SS_ISCONNECTED) ? 1 : 0;
+
+ if (flowadv && INP_WAIT_FOR_IF_FEEDBACK(in6p)) {
+ error = ENOBUFS;
+ goto release;
+ }
- priv = (proc_suser(p) == 0);
+ if (in6p->inp_flags & INP_BOUND_IF) {
+ ip6oa.ip6oa_boundif = in6p->inp_boundifp->if_index;
+ ip6oa.ip6oa_flags |= IP6OAF_BOUND_IF;
+ }
+ if (INP_NO_CELLULAR(in6p))
+ ip6oa.ip6oa_flags |= IP6OAF_NO_CELLULAR;
+ if (INP_NO_EXPENSIVE(in6p))
+ ip6oa.ip6oa_flags |= IP6OAF_NO_EXPENSIVE;
+ if (INP_AWDL_UNRESTRICTED(in6p))
+ ip6oa.ip6oa_flags |= IP6OAF_AWDL_UNRESTRICTED;
if (control) {
- if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0)
+ msc = mbuf_service_class_from_control(control);
+ 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) {
/*
* IPv4 version of udp_output calls in_pcbconnect in this case,
- * which needs splnet and affects performance.
+ * which has its costs.
+ *
* Since we saw no essential reason for calling in_pcbconnect,
* we get rid of such kind of logic, and call in6_selectsrc
* and in6_pcbsetport in order to fill in the local address
* and the local port.
*/
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr6;
+ struct sockaddr_in6 *sin6 =
+ (struct sockaddr_in6 *)(void *)addr6;
+
if (sin6->sin6_port == 0) {
error = EADDRNOTAVAIL;
goto release;
*/
error = EINVAL;
goto release;
- } else
+ } else {
af = AF_INET;
+ }
}
/* 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) {
fport = in6p->in6p_fport;
}
+ if (in6p->inp_flowhash == 0)
+ in6p->inp_flowhash = inp_calc_flowhash(in6p);
+ /* update flowinfo - RFC 6437 */
+ if (in6p->inp_flow == 0 && in6p->in6p_flags & IN6P_AUTOFLOWLABEL) {
+ in6p->inp_flow &= ~IPV6_FLOWLABEL_MASK;
+ in6p->inp_flow |=
+ (htonl(in6p->inp_flowhash) & IPV6_FLOWLABEL_MASK);
+ }
+
if (af == AF_INET)
- hlen = sizeof(struct ip);
+ hlen = sizeof (struct ip);
/*
* Calculate data length and get a mbuf
* for UDP and IP6 headers.
*/
- M_PREPEND(m, hlen + sizeof(struct udphdr), M_DONTWAIT);
+ M_PREPEND(m, hlen + sizeof (struct udphdr), M_DONTWAIT);
if (m == 0) {
error = ENOBUFS;
goto release;
/*
* Stuff checksum and output datagram.
*/
- udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen);
+ udp6 = (struct udphdr *)(void *)(mtod(m, caddr_t) + hlen);
udp6->uh_sport = in6p->in6p_lport; /* lport is always set in the PCB */
udp6->uh_dport = fport;
if (plen <= 0xffff)
switch (af) {
case AF_INET6:
ip6 = mtod(m, struct ip6_hdr *);
- ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK;
- ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
- ip6->ip6_vfc |= IPV6_VERSION;
-#if 0 /* ip6_plen will be filled in ip6_output. */
+ ip6->ip6_flow = in6p->inp_flow & IPV6_FLOWINFO_MASK;
+ ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
+ ip6->ip6_vfc |= IPV6_VERSION;
+#if 0 /* ip6_plen will be filled in ip6_output. */
ip6->ip6_plen = htons((u_short)plen);
#endif
ip6->ip6_nxt = IPPROTO_UDP;
- ip6->ip6_hlim = in6_selecthlim(in6p,
- in6p->in6p_route.ro_rt ?
- in6p->in6p_route.ro_rt->rt_ifp : NULL);
+ ip6->ip6_hlim = in6_selecthlim(in6p, in6p->in6p_route.ro_rt ?
+ in6p->in6p_route.ro_rt->rt_ifp : NULL);
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_pseudo(laddr, faddr,
+ htonl(plen + IPPROTO_UDP));
+ m->m_pkthdr.csum_flags = CSUM_UDPIPV6;
+ m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
+
+ if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
+ ip6oa.ip6oa_flags |= IP6OAF_BOUND_SRCADDR;
- flags = 0;
+ flags = IPV6_OUTARGS;
udp6stat.udp6s_opackets++;
-#ifdef IPSEC
- if (ipsec_bypass == 0 && ipsec_setsocket(m, in6p->in6p_socket) != 0) {
+
+#if NECP
+ {
+ necp_kernel_policy_id policy_id;
+ if (!necp_socket_is_allowed_to_send_recv_v6(in6p, in6p->in6p_lport, fport, laddr, faddr, NULL, &policy_id)) {
+ error = EHOSTUNREACH;
+ goto release;
+ }
+
+ necp_mark_packet_from_socket(m, in6p, policy_id);
+ }
+#endif /* NECP */
+
+#if IPSEC
+ if (in6p->in6p_sp != NULL && ipsec_setsocket(m, so) != 0) {
error = ENOBUFS;
goto release;
}
#endif /*IPSEC*/
- m->m_pkthdr.socket_id = get_socket_id(in6p->in6p_socket);
- error = ip6_output(m, in6p->in6p_outputopts, &in6p->in6p_route,
- flags, in6p->in6p_moptions, NULL, 0);
+
+ /* In case of IPv4-mapped address used in previous send */
+ if (ROUTE_UNUSABLE(&in6p->in6p_route) ||
+ rt_key(in6p->in6p_route.ro_rt)->sa_family != AF_INET6)
+ ROUTE_RELEASE(&in6p->in6p_route);
+
+ /* Copy the cached route and take an extra reference */
+ in6p_route_copyout(in6p, &ro);
+
+ set_packet_service_class(m, so, msc, PKT_SCF_IPV6);
+
+ m->m_pkthdr.pkt_flowsrc = FLOWSRC_INPCB;
+ m->m_pkthdr.pkt_flowid = in6p->inp_flowhash;
+ m->m_pkthdr.pkt_proto = IPPROTO_UDP;
+ m->m_pkthdr.pkt_flags |= (PKTF_FLOW_ID | PKTF_FLOW_LOCALSRC);
+ if (flowadv)
+ m->m_pkthdr.pkt_flags |= PKTF_FLOW_ADV;
+
+ im6o = in6p->in6p_moptions;
+ if (im6o != NULL) {
+ IM6O_LOCK(im6o);
+ IM6O_ADDREF_LOCKED(im6o);
+ if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
+ im6o->im6o_multicast_ifp != NULL) {
+ in6p->in6p_last_outifp =
+ im6o->im6o_multicast_ifp;
+ }
+ IM6O_UNLOCK(im6o);
+ }
+
+ in6p->inp_sndinprog_cnt++;
+
+ socket_unlock(so, 0);
+ error = ip6_output(m, optp, &ro, flags, im6o, NULL, &ip6oa);
+ m = NULL;
+ socket_lock(so, 0);
+
+ if (im6o != NULL)
+ IM6O_REMREF(im6o);
+
+ if (error == 0 && nstat_collect) {
+ boolean_t cell, wifi, wired;
+
+ if (in6p->in6p_route.ro_rt != NULL) {
+ cell = IFNET_IS_CELLULAR(in6p->in6p_route.
+ ro_rt->rt_ifp);
+ wifi = (!cell && IFNET_IS_WIFI(in6p->in6p_route.
+ ro_rt->rt_ifp));
+ wired = (!wifi && IFNET_IS_WIRED(in6p->in6p_route.
+ ro_rt->rt_ifp));
+ } else {
+ cell = wifi = wired = FALSE;
+ }
+ INP_ADD_STAT(in6p, cell, wifi, wired, txpackets, 1);
+ INP_ADD_STAT(in6p, cell, wifi, wired, txbytes, ulen);
+ }
+
+ if (flowadv && (adv->code == FADV_FLOW_CONTROLLED ||
+ adv->code == FADV_SUSPENDED)) {
+ /*
+ * Return an error to indicate
+ * that the packet has been dropped.
+ */
+ error = ENOBUFS;
+ inp_set_fc_state(in6p, adv->code);
+ }
+
+ VERIFY(in6p->inp_sndinprog_cnt > 0);
+ if ( --in6p->inp_sndinprog_cnt == 0)
+ in6p->inp_flags &= ~(INP_FC_FEEDBACK);
+
+ /* Synchronize PCB cached route */
+ in6p_route_copyin(in6p, &ro);
+
+ if (in6p->in6p_route.ro_rt != NULL) {
+ struct rtentry *rt = in6p->in6p_route.ro_rt;
+ struct ifnet *outif;
+
+ if (rt->rt_flags & RTF_MULTICAST)
+ rt = NULL; /* unusable */
+
+ /*
+ * Always discard the cached route for unconnected
+ * socket or if it is a multicast route.
+ */
+ if (rt == NULL)
+ ROUTE_RELEASE(&in6p->in6p_route);
+
+ /*
+ * If the destination route is unicast, update outif
+ * with that of the route interface used by IP.
+ */
+ if (rt != NULL &&
+ (outif = rt->rt_ifp) != in6p->in6p_last_outifp)
+ in6p->in6p_last_outifp = outif;
+ } else {
+ ROUTE_RELEASE(&in6p->in6p_route);
+ }
+
+ /*
+ * If output interface was cellular/expensive, and this
+ * socket is denied access to it, generate an event.
+ */
+ if (error != 0 && (ip6oa.ip6oa_retflags & IP6OARF_IFDENIED) &&
+ (INP_NO_CELLULAR(in6p) || INP_NO_EXPENSIVE(in6p)))
+ soevent(in6p->inp_socket, (SO_FILT_HINT_LOCKED|
+ SO_FILT_HINT_IFDENIED));
break;
case AF_INET:
error = EAFNOSUPPORT;
goto releaseopt;
release:
- m_freem(m);
+ if (m != NULL)
+ m_freem(m);
releaseopt:
- if (control) {
- ip6_clearpktopts(in6p->in6p_outputopts, 0, -1);
- in6p->in6p_outputopts = stickyopt;
+ if (control != NULL) {
+ if (optp == &opt)
+ ip6_clearpktopts(optp, -1);
m_freem(control);
}
- return(error);
+ return (error);
}
projects / apple / xnu.git / blobdiff