/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License"). You may not use this file except in compliance with the
+ * License. Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
*
- * 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. 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
+ * This 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.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
+#include <kern/locks.h>
+#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
+#include <netinet/kpi_ipfilter_var.h>
+
#include "faith.h"
#include <net/dlil.h>
#define DBG_LAYER_BEG NETDBG_CODE(DBG_NETIP, 1)
#define DBG_LAYER_END NETDBG_CODE(DBG_NETIP, 3)
#define DBG_FNC_IP_OUTPUT NETDBG_CODE(DBG_NETIP, (1 << 8) | 1)
+#define DBG_FNC_IPSEC4_OUTPUT NETDBG_CODE(DBG_NETIP, (2 << 8) | 1)
-#if vax
-#include <machine/mtpr.h>
-#endif
-
-#if __FreeBSD__
-#include <machine/in_cksum.h>
-
-static MALLOC_DEFINE(M_IPMOPTS, "ip_moptions", "internet multicast options");
-#endif
-
#if IPSEC
#include <netinet6/ipsec.h>
#include <netkey/key.h>
#endif /*IPSEC*/
#include <netinet/ip_fw.h>
+#include <netinet/ip_divert.h>
#if DUMMYNET
#include <netinet/ip_dummynet.h>
(ntohl(a.s_addr))&0xFF);
#endif
+#if IPSEC
+extern lck_mtx_t *sadb_mutex;
+#endif
+
u_short ip_id;
-static struct mbuf *ip_insertoptions __P((struct mbuf *, struct mbuf *, int *));
-static struct ifnet *ip_multicast_if __P((struct in_addr *, int *));
-static void ip_mloopback
- __P((struct ifnet *, struct mbuf *, struct sockaddr_in *, int));
-static int ip_getmoptions
- __P((struct sockopt *, struct ip_moptions *));
-static int ip_pcbopts __P((int, struct mbuf **, struct mbuf *));
-static int ip_setmoptions
- __P((struct sockopt *, struct ip_moptions **));
-
-int ip_optcopy __P((struct ip *, struct ip *));
-extern int (*fr_checkp) __P((struct ip *, int, struct ifnet *, int, struct mbuf **));
+static struct mbuf *ip_insertoptions(struct mbuf *, struct mbuf *, int *);
+static struct ifnet *ip_multicast_if(struct in_addr *, int *);
+static void ip_mloopback(struct ifnet *, struct mbuf *,
+ struct sockaddr_in *, int);
+static int ip_getmoptions(struct sockopt *, struct ip_moptions *);
+static int ip_pcbopts(int, struct mbuf **, struct mbuf *);
+static int ip_setmoptions(struct sockopt *, struct ip_moptions **);
+
+int ip_createmoptions(struct ip_moptions **imop);
+int ip_addmembership(struct ip_moptions *imo, struct ip_mreq *mreq);
+int ip_dropmembership(struct ip_moptions *imo, struct ip_mreq *mreq);
+int ip_optcopy(struct ip *, struct ip *);
+extern int (*fr_checkp)(struct ip *, int, struct ifnet *, int, struct mbuf **);
#ifdef __APPLE__
extern struct mbuf* m_dup(register struct mbuf *m, int how);
#endif
-static u_long lo_dl_tag = 0;
-
-void in_delayed_cksum(struct mbuf *m);
extern int apple_hwcksum_tx;
+extern u_long route_generation;
extern struct protosw inetsw[];
extern struct ip_linklocal_stat ip_linklocal_stat;
+extern lck_mtx_t *ip_mutex;
/* temporary: for testing */
#if IPSEC
extern int ipsec_bypass;
#endif
+static int ip_maxchainsent = 0;
+SYSCTL_INT(_net_inet_ip, OID_AUTO, maxchainsent, CTLFLAG_RW,
+ &ip_maxchainsent, 0, "use dlil_output_list");
/*
* IP output. The packet in mbuf chain m contains a skeletal IP
* header (with len, off, ttl, proto, tos, src, dst).
* The mbuf opt, if present, will not be freed.
*/
int
-ip_output(m0, opt, ro, flags, imo)
- struct mbuf *m0;
- struct mbuf *opt;
- struct route *ro;
- int flags;
- struct ip_moptions *imo;
+ip_output(
+ struct mbuf *m0,
+ struct mbuf *opt,
+ struct route *ro,
+ int flags,
+ struct ip_moptions *imo)
+{
+ int error;
+ error = ip_output_list(m0, 0, opt, ro, flags, imo);
+ return error;
+}
+
+int
+ip_output_list(
+ struct mbuf *m0,
+ int packetchain,
+ struct mbuf *opt,
+ struct route *ro,
+ int flags,
+ struct ip_moptions *imo)
{
struct ip *ip, *mhip;
- struct ifnet *ifp;
- u_long dl_tag;
+ struct ifnet *ifp = NULL;
struct mbuf *m = m0;
int hlen = sizeof (struct ip);
int len, off, error = 0;
- struct sockaddr_in *dst;
+ struct sockaddr_in *dst = NULL;
struct in_ifaddr *ia = NULL;
int isbroadcast, sw_csum;
+ struct in_addr pkt_dst;
#if IPSEC
struct route iproute;
struct socket *so = NULL;
struct secpolicy *sp = NULL;
#endif
- u_int16_t divert_cookie; /* firewall cookie */
#if IPFIREWALL_FORWARD
int fwd_rewrite_src = 0;
#endif
- struct ip_fw_chain *rule = NULL;
-
-#if IPDIVERT
- /* Get and reset firewall cookie */
- divert_cookie = ip_divert_cookie;
- ip_divert_cookie = 0;
-#else
- divert_cookie = 0;
-#endif
+ struct ip_fw_args args;
+ int didfilter = 0;
+ ipfilter_t inject_filter_ref = 0;
+ struct m_tag *tag;
+ struct route dn_route;
+ struct mbuf * packetlist;
+ int pktcnt = 0;
+
+ lck_mtx_lock(ip_mutex);
KERNEL_DEBUG(DBG_FNC_IP_OUTPUT | DBG_FUNC_START, 0,0,0,0,0);
-#if IPFIREWALL && DUMMYNET
- /*
- * dummynet packet are prepended a vestigial mbuf with
- * m_type = MT_DUMMYNET and m_data pointing to the matching
- * rule.
- */
- if (m->m_type == MT_DUMMYNET) {
- /*
- * the packet was already tagged, so part of the
- * processing was already done, and we need to go down.
- * Get parameters from the header.
- */
- rule = (struct ip_fw_chain *)(m->m_data) ;
- opt = NULL ;
- ro = & ( ((struct dn_pkt *)m)->ro ) ;
- imo = NULL ;
- dst = ((struct dn_pkt *)m)->dn_dst ;
- ifp = ((struct dn_pkt *)m)->ifp ;
- flags = ((struct dn_pkt *)m)->flags ;
- m0 = m = m->m_next ;
-#if IPSEC
- if (ipsec_bypass == 0) {
- so = ipsec_getsocket(m);
- (void)ipsec_setsocket(m, NULL);
- }
+ packetlist = m0;
+ args.eh = NULL;
+ args.rule = NULL;
+ args.next_hop = NULL;
+ args.divert_rule = 0; /* divert cookie */
+
+ /* Grab info from mtags prepended to the chain */
+#if DUMMYNET
+ if ((tag = m_tag_locate(m0, KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_DUMMYNET, NULL)) != NULL) {
+ struct dn_pkt_tag *dn_tag;
+
+ dn_tag = (struct dn_pkt_tag *)(tag+1);
+ args.rule = dn_tag->rule;
+ opt = NULL;
+ dn_route = dn_tag->ro;
+ ro = &dn_route;
+
+ imo = NULL;
+ dst = dn_tag->dn_dst;
+ ifp = dn_tag->ifp;
+ flags = dn_tag->flags;
+
+ m_tag_delete(m0, tag);
+ }
+#endif /* DUMMYNET */
+
+ if ((tag = m_tag_locate(m0, KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_DIVERT, NULL)) != NULL) {
+ struct divert_tag *div_tag;
+
+ div_tag = (struct divert_tag *)(tag+1);
+ args.divert_rule = div_tag->cookie;
+
+ m_tag_delete(m0, tag);
+ }
+ if ((tag = m_tag_locate(m0, KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_IPFORWARD, NULL)) != NULL) {
+ struct ip_fwd_tag *ipfwd_tag;
+
+ ipfwd_tag = (struct ip_fwd_tag *)(tag+1);
+ args.next_hop = ipfwd_tag->next_hop;
+
+ m_tag_delete(m0, tag);
+ }
+
+ m = m0;
+
+#if DIAGNOSTIC
+ if ( !m || (m->m_flags & M_PKTHDR) != 0)
+ panic("ip_output no HDR");
+ if (!ro)
+ panic("ip_output no route, proto = %d",
+ mtod(m, struct ip *)->ip_p);
#endif
+
+ if (args.rule != NULL) { /* dummynet already saw us */
ip = mtod(m, struct ip *);
hlen = IP_VHL_HL(ip->ip_vhl) << 2 ;
if (ro->ro_rt != NULL)
ia = (struct in_ifaddr *)ro->ro_rt->rt_ifa;
- goto sendit;
- } else
- rule = NULL ;
+ if (ia)
+ ifaref(&ia->ia_ifa);
+#if IPSEC
+ if (ipsec_bypass == 0 && (flags & IP_NOIPSEC) == 0) {
+ so = ipsec_getsocket(m);
+ (void)ipsec_setsocket(m, NULL);
+ }
#endif
+ goto sendit;
+ }
+
#if IPSEC
- if (ipsec_bypass == 0) {
+ if (ipsec_bypass == 0 && (flags & IP_NOIPSEC) == 0) {
so = ipsec_getsocket(m);
(void)ipsec_setsocket(m, NULL);
}
#endif
+loopit:
+ /*
+ * No need to proccess packet twice if we've
+ * already seen it
+ */
+ inject_filter_ref = ipf_get_inject_filter(m);
-#if DIAGNOSTIC
- if ((m->m_flags & M_PKTHDR) == 0)
- panic("ip_output no HDR");
- if (!ro)
- panic("ip_output no route, proto = %d",
- mtod(m, struct ip *)->ip_p);
-#endif
if (opt) {
m = ip_insertoptions(m, opt, &len);
hlen = len;
}
ip = mtod(m, struct ip *);
+ pkt_dst = args.next_hop ? args.next_hop->sin_addr : ip->ip_dst;
+
/*
* Fill in IP header.
*/
ip->ip_src.s_addr, ip->ip_p, ip->ip_off, ip->ip_len);
dst = (struct sockaddr_in *)&ro->ro_dst;
+
/*
* If there is a cached route,
* check that it is to the same destination
* and is still up. If not, free it and try again.
+ * The address family should also be checked in case of sharing the
+ * cache with IPv6.
*/
+
+ {
+ if (ro->ro_rt && (ro->ro_rt->generation_id != route_generation) &&
+ ((flags & (IP_ROUTETOIF | IP_FORWARDING)) == 0) && (ip->ip_src.s_addr != INADDR_ANY) &&
+ (ifa_foraddr(ip->ip_src.s_addr) == 0)) {
+ error = EADDRNOTAVAIL;
+ goto bad;
+ }
+ }
if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 ||
- dst->sin_addr.s_addr != ip->ip_dst.s_addr)) {
+ dst->sin_family != AF_INET ||
+ dst->sin_addr.s_addr != pkt_dst.s_addr)) {
rtfree(ro->ro_rt);
ro->ro_rt = (struct rtentry *)0;
}
if (ro->ro_rt == 0) {
+ bzero(dst, sizeof(*dst));
dst->sin_family = AF_INET;
dst->sin_len = sizeof(*dst);
- dst->sin_addr = ip->ip_dst;
+ dst->sin_addr = pkt_dst;
}
/*
* If routing to interface only,
#define ifatoia(ifa) ((struct in_ifaddr *)(ifa))
#define sintosa(sin) ((struct sockaddr *)(sin))
if (flags & IP_ROUTETOIF) {
- if ((ia = ifatoia(ifa_ifwithdstaddr(sintosa(dst)))) == 0 &&
- (ia = ifatoia(ifa_ifwithnet(sintosa(dst)))) == 0) {
- ipstat.ips_noroute++;
- error = ENETUNREACH;
- goto bad;
+ if (ia)
+ ifafree(&ia->ia_ifa);
+ if ((ia = ifatoia(ifa_ifwithdstaddr(sintosa(dst)))) == 0) {
+ if ((ia = ifatoia(ifa_ifwithnet(sintosa(dst)))) == 0) {
+ ipstat.ips_noroute++;
+ error = ENETUNREACH;
+ goto bad;
+ }
}
ifp = ia->ia_ifp;
- dl_tag = ia->ia_ifa.ifa_dlt;
ip->ip_ttl = 1;
isbroadcast = in_broadcast(dst->sin_addr, ifp);
} else {
error = EHOSTUNREACH;
goto bad;
}
+ if (ia)
+ ifafree(&ia->ia_ifa);
ia = ifatoia(ro->ro_rt->rt_ifa);
+ if (ia)
+ ifaref(&ia->ia_ifa);
ifp = ro->ro_rt->rt_ifp;
- dl_tag = ro->ro_rt->rt_dlt;
ro->ro_rt->rt_use++;
if (ro->ro_rt->rt_flags & RTF_GATEWAY)
dst = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
else
isbroadcast = in_broadcast(dst->sin_addr, ifp);
}
- if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
+ if (IN_MULTICAST(ntohl(pkt_dst.s_addr))) {
struct in_multi *inm;
m->m_flags |= M_MCAST;
* See if the caller provided any multicast options
*/
if (imo != NULL) {
- ip->ip_ttl = imo->imo_multicast_ttl;
+ if ((flags & IP_RAWOUTPUT) == 0) ip->ip_ttl = imo->imo_multicast_ttl;
if (imo->imo_multicast_ifp != NULL) {
ifp = imo->imo_multicast_ifp;
- dl_tag = ifp->if_data.default_proto;
}
- if (imo->imo_multicast_vif != -1)
+ if (imo->imo_multicast_vif != -1 &&
+ ((flags & IP_RAWOUTPUT) == 0 || ip->ip_src.s_addr == INADDR_ANY))
ip->ip_src.s_addr =
- ip_mcast_src(imo->imo_multicast_vif);
+ ip_mcast_src(imo->imo_multicast_vif);
} else
- ip->ip_ttl = IP_DEFAULT_MULTICAST_TTL;
+ if ((flags & IP_RAWOUTPUT) == 0) ip->ip_ttl = IP_DEFAULT_MULTICAST_TTL;
/*
* Confirm that the outgoing interface supports multicast.
*/
TAILQ_FOREACH(ia1, &in_ifaddrhead, ia_link)
if (ia1->ia_ifp == ifp) {
ip->ip_src = IA_SIN(ia1)->sin_addr;
+
break;
}
+ if (ip->ip_src.s_addr == INADDR_ANY) {
+ error = ENETUNREACH;
+ goto bad;
+ }
}
- IN_LOOKUP_MULTI(ip->ip_dst, ifp, inm);
+ ifnet_lock_shared(ifp);
+ IN_LOOKUP_MULTI(pkt_dst, ifp, inm);
+ ifnet_lock_done(ifp);
if (inm != NULL &&
(imo == NULL || imo->imo_multicast_loop)) {
/*
* on the outgoing interface, and the caller did not
* forbid loopback, loop back a copy.
*/
+ if (!TAILQ_EMPTY(&ipv4_filters)) {
+ struct ipfilter *filter;
+ int seen = (inject_filter_ref == 0);
+ struct ipf_pktopts *ippo = 0, ipf_pktopts;
+
+ if (imo) {
+ ippo = &ipf_pktopts;
+ ipf_pktopts.ippo_mcast_ifnet = imo->imo_multicast_ifp;
+ ipf_pktopts.ippo_mcast_ttl = imo->imo_multicast_ttl;
+ ipf_pktopts.ippo_mcast_loop = imo->imo_multicast_loop;
+ }
+
+ lck_mtx_unlock(ip_mutex);
+ ipf_ref();
+ TAILQ_FOREACH(filter, &ipv4_filters, ipf_link) {
+ if (seen == 0) {
+ if ((struct ipfilter *)inject_filter_ref == filter)
+ seen = 1;
+ } else if (filter->ipf_filter.ipf_output) {
+ errno_t result;
+ result = filter->ipf_filter.ipf_output(filter->ipf_filter.cookie, (mbuf_t*)&m, ippo);
+ if (result == EJUSTRETURN) {
+ ipf_unref();
+ goto done;
+ }
+ if (result != 0) {
+ ipf_unref();
+ lck_mtx_lock(ip_mutex);
+ goto bad;
+ }
+ }
+ }
+ lck_mtx_lock(ip_mutex);
+ ipf_unref();
+ didfilter = 1;
+ }
ip_mloopback(ifp, m, dst, hlen);
}
else {
imo = NULL;
if (ip_mforward(ip, ifp, m, imo) != 0) {
m_freem(m);
+ lck_mtx_unlock(ip_mutex);
goto done;
}
}
*/
if (ip->ip_ttl == 0 || ifp->if_flags & IFF_LOOPBACK) {
m_freem(m);
+ lck_mtx_unlock(ip_mutex);
goto done;
}
#endif /* IPFIREWALL_FORWARD */
}
#endif /* notdef */
- /*
- * Verify that we have any chance at all of being able to queue
- * the packet or packet fragments
- */
- if ((ifp->if_snd.ifq_len + ip->ip_len / ifp->if_mtu + 1) >=
- ifp->if_snd.ifq_maxlen) {
- error = ENOBUFS;
- goto bad;
- }
/*
* Look for broadcast address and
}
}
+injectit:
+ if (!didfilter && !TAILQ_EMPTY(&ipv4_filters)) {
+ struct ipfilter *filter;
+ int seen = (inject_filter_ref == 0);
+
+ lck_mtx_unlock(ip_mutex);
+ ipf_ref();
+ TAILQ_FOREACH(filter, &ipv4_filters, ipf_link) {
+ if (seen == 0) {
+ if ((struct ipfilter *)inject_filter_ref == filter)
+ seen = 1;
+ } else if (filter->ipf_filter.ipf_output) {
+ errno_t result;
+ result = filter->ipf_filter.ipf_output(filter->ipf_filter.cookie, (mbuf_t*)&m, 0);
+ if (result == EJUSTRETURN) {
+ ipf_unref();
+ goto done;
+ }
+ if (result != 0) {
+ ipf_unref();
+ lck_mtx_lock(ip_mutex);
+ goto bad;
+ }
+ }
+ }
+ ipf_unref();
+ lck_mtx_lock(ip_mutex);
+ }
+
#if IPSEC
/* temporary for testing only: bypass ipsec alltogether */
- if (ipsec_bypass != 0)
+ if (ipsec_bypass != 0 || (flags & IP_NOIPSEC) != 0)
goto skip_ipsec;
+ KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_START, 0,0,0,0,0);
+
+ lck_mtx_lock(sadb_mutex);
+
/* get SP for this packet */
if (so == NULL)
sp = ipsec4_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND, flags, &error);
if (sp == NULL) {
ipsecstat.out_inval++;
+ KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 0,0,0,0,0);
+ lck_mtx_unlock(sadb_mutex);
goto bad;
}
* This packet is just discarded.
*/
ipsecstat.out_polvio++;
+ KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 1,0,0,0,0);
+ lck_mtx_unlock(sadb_mutex);
goto bad;
case IPSEC_POLICY_BYPASS:
case IPSEC_POLICY_NONE:
/* no need to do IPsec. */
+ KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 2,0,0,0,0);
+ lck_mtx_unlock(sadb_mutex);
goto skip_ipsec;
case IPSEC_POLICY_IPSEC:
if (sp->req == NULL) {
/* acquire a policy */
error = key_spdacquire(sp);
+ KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 3,0,0,0,0);
+ lck_mtx_unlock(sadb_mutex);
goto bad;
}
break;
HTONS(ip->ip_len);
HTONS(ip->ip_off);
+ lck_mtx_unlock(ip_mutex);
error = ipsec4_output(&state, sp, flags);
-
- m = state.m;
+ lck_mtx_unlock(sadb_mutex);
+ lck_mtx_lock(ip_mutex);
+
+ m0 = m = state.m;
+
if (flags & IP_ROUTETOIF) {
/*
* if we have tunnel mode SA, we may need to ignore
}
} else
ro = state.ro;
+
dst = (struct sockaddr_in *)state.dst;
if (error) {
/* mbuf is already reclaimed in ipsec4_output. */
error = 0;
break;
}
+ KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 4,0,0,0,0);
goto bad;
}
}
/* be sure to update variables that are affected by ipsec4_output() */
ip = mtod(m, struct ip *);
+
#ifdef _IP_VHL
hlen = IP_VHL_HL(ip->ip_vhl) << 2;
#else
hlen = ip->ip_hl << 2;
#endif
+ /* Check that there wasn't a route change and src is still valid */
+
+ if (ro->ro_rt->generation_id != route_generation) {
+ if (ifa_foraddr(ip->ip_src.s_addr) == 0 && ((flags & (IP_ROUTETOIF | IP_FORWARDING)) == 0)) {
+ error = EADDRNOTAVAIL;
+ KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 5,0,0,0,0);
+ goto bad;
+ }
+ rtfree(ro->ro_rt);
+ ro->ro_rt = NULL;
+ }
+
if (ro->ro_rt == NULL) {
if ((flags & IP_ROUTETOIF) == 0) {
printf("ip_output: "
"can't update route after IPsec processing\n");
- error = EHOSTUNREACH; /*XXX*/
+ error = EHOSTUNREACH; /*XXX*/
+ KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 6,0,0,0,0);
goto bad;
}
} else {
+ if (ia)
+ ifafree(&ia->ia_ifa);
ia = ifatoia(ro->ro_rt->rt_ifa);
+ if (ia)
+ ifaref(&ia->ia_ifa);
ifp = ro->ro_rt->rt_ifp;
- dl_tag = ia->ia_ifa.ifa_dlt;
}
/* make it flipped, again. */
NTOHS(ip->ip_len);
NTOHS(ip->ip_off);
+ KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 7,0xff,0xff,0xff,0xff);
+
+ /* Pass to filters again */
+ if (!TAILQ_EMPTY(&ipv4_filters)) {
+ struct ipfilter *filter;
+
+ lck_mtx_unlock(ip_mutex);
+ ipf_ref();
+ TAILQ_FOREACH(filter, &ipv4_filters, ipf_link) {
+ if (filter->ipf_filter.ipf_output) {
+ errno_t result;
+ result = filter->ipf_filter.ipf_output(filter->ipf_filter.cookie, (mbuf_t*)&m, 0);
+ if (result == EJUSTRETURN) {
+ ipf_unref();
+ goto done;
+ }
+ if (result != 0) {
+ ipf_unref();
+ lck_mtx_lock(ip_mutex);
+ goto bad;
+ }
+ }
+ }
+ ipf_unref();
+ lck_mtx_lock(ip_mutex);
+ }
skip_ipsec:
#endif /*IPSEC*/
if (fr_checkp) {
struct mbuf *m1 = m;
- if ((error = (*fr_checkp)(ip, hlen, ifp, 1, &m1)) || !m1)
+ if ((error = (*fr_checkp)(ip, hlen, ifp, 1, &m1)) || !m1) {
+ lck_mtx_unlock(ip_mutex);
goto done;
- ip = mtod(m = m1, struct ip *);
+ }
+ ip = mtod(m0 = m = m1, struct ip *);
}
/*
* Check with the firewall...
+ * but not if we are already being fwd'd from a firewall.
*/
- if (fw_enable && ip_fw_chk_ptr) {
+ if (fw_enable && IPFW_LOADED && !args.next_hop) {
struct sockaddr_in *old = dst;
- off = (*ip_fw_chk_ptr)(&ip,
- hlen, ifp, &divert_cookie, &m, &rule, &dst);
+ args.m = m;
+ args.next_hop = dst;
+ args.oif = ifp;
+ lck_mtx_unlock(ip_mutex);
+ off = ip_fw_chk_ptr(&args);
+ m = args.m;
+ dst = args.next_hop;
+
/*
* On return we must do the following:
* IP_FW_PORT_DENY_FLAG -> drop the pkt (XXX new)
* unsupported rules), but better play safe and drop
* packets in case of doubt.
*/
+ m0 = m;
if ( (off & IP_FW_PORT_DENY_FLAG) || m == NULL) {
if (m)
m_freem(m);
goto done ;
}
ip = mtod(m, struct ip *);
- if (off == 0 && dst == old) /* common case */
+ if (off == 0 && dst == old) {/* common case */
+ lck_mtx_lock(ip_mutex);
goto pass ;
+ }
#if DUMMYNET
- if ((off & IP_FW_PORT_DYNT_FLAG) != 0) {
+ if (DUMMYNET_LOADED && (off & IP_FW_PORT_DYNT_FLAG) != 0) {
/*
* pass the pkt to dummynet. Need to include
* pipe number, m, ifp, ro, dst because these are
* XXX note: if the ifp or ro entry are deleted
* while a pkt is in dummynet, we are in trouble!
*/
- error = dummynet_io(off & 0xffff, DN_TO_IP_OUT, m,
- ifp,ro,dst,rule, flags);
+ args.ro = ro;
+ args.dst = dst;
+ args.flags = flags;
+
+ error = ip_dn_io_ptr(m, off & 0xffff, DN_TO_IP_OUT,
+ &args);
goto done;
}
-#endif
+#endif /* DUMMYNET */
+ lck_mtx_lock(ip_mutex);
#if IPDIVERT
if (off != 0 && (off & IP_FW_PORT_DYNT_FLAG) == 0) {
struct mbuf *clone = NULL;
HTONS(ip->ip_off);
/* Deliver packet to divert input routine */
- ip_divert_cookie = divert_cookie;
- divert_packet(m, 0, off & 0xffff);
+ divert_packet(m, 0, off & 0xffff, args.divert_rule);
/* If 'tee', continue with original packet */
if (clone != NULL) {
- m = clone;
+ m0 = m = clone;
ip = mtod(m, struct ip *);
goto pass;
}
+ lck_mtx_unlock(ip_mutex);
goto done;
}
#endif
* And I'm babbling.
*/
if (off == 0 && old != dst) {
- struct in_ifaddr *ia;
+ struct in_ifaddr *ia_fw;
/* It's changed... */
/* There must be a better way to do this next line... */
* as the packet runs through ip_input() as
* it is done through a ISR.
*/
- TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) {
+ TAILQ_FOREACH(ia_fw, &in_ifaddrhead, ia_link) {
/*
* If the addr to forward to is one
* of ours, we pretend to
* be the destination for this packet.
*/
- if (IA_SIN(ia)->sin_addr.s_addr ==
+ if (IA_SIN(ia_fw)->sin_addr.s_addr ==
dst->sin_addr.s_addr)
break;
}
if (ia) {
/* tell ip_input "dont filter" */
- ip_fw_fwd_addr = dst;
+ struct m_tag *fwd_tag;
+ struct ip_fwd_tag *ipfwd_tag;
+
+ fwd_tag = m_tag_alloc(KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_IPFORWARD,
+ sizeof(struct sockaddr_in), M_NOWAIT);
+ if (fwd_tag == NULL) {
+ error = ENOBUFS;
+ goto bad;
+ }
+
+ ipfwd_tag = (struct ip_fwd_tag *)(fwd_tag+1);
+ ipfwd_tag->next_hop = args.next_hop;
+
+ m_tag_prepend(m, fwd_tag);
+
if (m->m_pkthdr.rcvif == NULL)
m->m_pkthdr.rcvif = ifunit("lo0");
- if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
+ if ((~IF_HWASSIST_CSUM_FLAGS(m->m_pkthdr.rcvif->if_hwassist) &
+ m->m_pkthdr.csum_flags) == 0) {
+ if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
+ m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
+ m->m_pkthdr.csum_flags |=
+ CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
+ m->m_pkthdr.csum_data = 0xffff;
+ }
m->m_pkthdr.csum_flags |=
- CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
- m0->m_pkthdr.csum_data = 0xffff;
+ CSUM_IP_CHECKED | CSUM_IP_VALID;
+ }
+ else if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
+ in_delayed_cksum(m);
+ m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
+ ip->ip_sum = in_cksum(m, hlen);
}
- m->m_pkthdr.csum_flags |=
- CSUM_IP_CHECKED | CSUM_IP_VALID;
HTONS(ip->ip_len);
HTONS(ip->ip_off);
- ip_input(m);
+
+ lck_mtx_unlock(ip_mutex);
+
+ /* we need to call dlil_output to run filters
+ * and resync to avoid recursion loops.
+ */
+ if (lo_ifp) {
+ dlil_output(lo_ifp, PF_INET, m, 0, (struct sockaddr *)dst, 0);
+ }
+ else {
+ printf("ip_output: no loopback ifp for forwarding!!!\n");
+ }
goto done;
}
/* Some of the logic for this was
goto bad;
}
- ia = ifatoia(ro_fwd->ro_rt->rt_ifa);
+ ia_fw = ifatoia(ro_fwd->ro_rt->rt_ifa);
ifp = ro_fwd->ro_rt->rt_ifp;
- dl_tag = ro_fwd->ro_rt->rt_dlt;
ro_fwd->ro_rt->rt_use++;
if (ro_fwd->ro_rt->rt_flags & RTF_GATEWAY)
dst = (struct sockaddr_in *)ro_fwd->ro_rt->rt_gateway;
* interface, do it again, from the new one.
*/
if (fwd_rewrite_src)
- ip->ip_src = IA_SIN(ia)->sin_addr;
+ ip->ip_src = IA_SIN(ia_fw)->sin_addr;
goto pass ;
}
#endif /* IPFIREWALL_FORWARD */
* we have to drop the pkt
*/
m_freem(m);
- error = EACCES; /* not sure this is the right error msg */
- goto done;
+ error = EACCES; /* not sure this is the right error msg */
+ lck_mtx_unlock(ip_mutex);
+ goto done;
}
pass:
+#if __APPLE__
+ /* Do not allow loopback address to wind up on a wire */
+ if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
+ ((ntohl(ip->ip_src.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET ||
+ (ntohl(ip->ip_dst.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)) {
+ ipstat.ips_badaddr++;
+ m_freem(m);
+ /*
+ * Do not simply drop the packet just like a firewall -- we want the
+ * the application to feel the pain.
+ * Return ENETUNREACH like ip6_output does in some similar cases.
+ * This can startle the otherwise clueless process that specifies
+ * loopback as the source address.
+ */
+ error = ENETUNREACH;
+ lck_mtx_unlock(ip_mutex);
+ goto done;
+ }
+#endif
m->m_pkthdr.csum_flags |= CSUM_IP;
- sw_csum = m->m_pkthdr.csum_flags & ~ifp->if_hwassist;
+ sw_csum = m->m_pkthdr.csum_flags
+ & ~IF_HWASSIST_CSUM_FLAGS(ifp->if_hwassist);
if ((ifp->if_hwassist & CSUM_TCP_SUM16) != 0) {
/*
m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
}
- m->m_pkthdr.csum_flags &= ifp->if_hwassist;
+ m->m_pkthdr.csum_flags &= IF_HWASSIST_CSUM_FLAGS(ifp->if_hwassist);
/*
* If small enough for interface, or the interface will take
#if IPSEC
/* clean ipsec history once it goes out of the node */
- if (ipsec_bypass == 0)
+ if (ipsec_bypass == 0 && (flags & IP_NOIPSEC) == 0)
ipsec_delaux(m);
#endif
-#if __APPLE__
- error = dlil_output(dl_tag, m, (void *) ro->ro_rt,
+ if (packetchain == 0) {
+ lck_mtx_unlock(ip_mutex);
+ error = dlil_output(ifp, PF_INET, m, (void *) ro->ro_rt,
(struct sockaddr *)dst, 0);
-#else
- error = (*ifp->if_output)(ifp, m,
- (struct sockaddr *)dst, ro->ro_rt);
-#endif
- goto done;
+ goto done;
+ }
+ else { /* packet chaining allows us to reuse the route for all packets */
+ m = m->m_nextpkt;
+ if (m == NULL) {
+ if (pktcnt > ip_maxchainsent)
+ ip_maxchainsent = pktcnt;
+ //send
+ lck_mtx_unlock(ip_mutex);
+ error = dlil_output_list(ifp, PF_INET, packetlist, (void *) ro->ro_rt,
+ (struct sockaddr *)dst, 0);
+ pktcnt = 0;
+ goto done;
+
+ }
+ m0 = m;
+ pktcnt++;
+ goto loopit;
+ }
}
/*
* Too large for interface; fragment if possible.
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA &&
(ifp->if_hwassist & CSUM_IP_FRAGS) == 0) {
in_delayed_cksum(m);
- if (m == NULL)
+ if (m == NULL) {
+ lck_mtx_unlock(ip_mutex);
return(ENOMEM);
+ }
m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
}
goto sendorfree;
}
m->m_pkthdr.len = mhlen + len;
- m->m_pkthdr.rcvif = (struct ifnet *)0;
+ m->m_pkthdr.rcvif = 0;
m->m_pkthdr.csum_flags = m0->m_pkthdr.csum_flags;
+ m->m_pkthdr.socket_id = m0->m_pkthdr.socket_id;
HTONS(mhip->ip_off);
mhip->ip_sum = 0;
if (sw_csum & CSUM_DELAY_IP) {
KERNEL_DEBUG(DBG_LAYER_END, ip->ip_dst.s_addr,
ip->ip_src.s_addr, ip->ip_p, ip->ip_off, ip->ip_len);
+ lck_mtx_unlock(ip_mutex);
for (m = m0; m; m = m0) {
m0 = m->m_nextpkt;
m->m_nextpkt = 0;
#if IPSEC
/* clean ipsec history once it goes out of the node */
- if (ipsec_bypass == 0)
+ if (ipsec_bypass == 0 && (flags & IP_NOIPSEC) == 0)
ipsec_delaux(m);
#endif
if (error == 0) {
ia->ia_ifa.if_obytes += m->m_pkthdr.len;
}
#endif
-
-#if __APPLE__
- error = dlil_output(dl_tag, m, (void *) ro->ro_rt,
+ if ((packetchain != 0) && (pktcnt > 0))
+ panic("ip_output: mix of packet in packetlist is wrong=%x", packetlist);
+ error = dlil_output(ifp, PF_INET, m, (void *) ro->ro_rt,
(struct sockaddr *)dst, 0);
-#else
- error = (*ifp->if_output)(ifp, m,
- (struct sockaddr *)dst, ro->ro_rt);
-#endif
} else
m_freem(m);
}
ipstat.ips_fragmented++;
}
done:
+ if (ia) {
+ ifafree(&ia->ia_ifa);
+ ia = NULL;
+ }
#if IPSEC
- if (ipsec_bypass == 0) {
+ if (ipsec_bypass == 0 && (flags & IP_NOIPSEC) == 0) {
if (ro == &iproute && ro->ro_rt) {
rtfree(ro->ro_rt);
ro->ro_rt = NULL;
if (sp != NULL) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP ip_output call free SP:%x\n", sp));
+ lck_mtx_lock(sadb_mutex);
key_freesp(sp);
+ lck_mtx_unlock(sadb_mutex);
}
}
#endif /* IPSEC */
return (error);
bad:
m_freem(m0);
+ lck_mtx_unlock(ip_mutex);
goto done;
}
void
-in_delayed_cksum(struct mbuf *m)
+in_delayed_cksum_offset(struct mbuf *m, int ip_offset)
{
struct ip *ip;
u_short csum, offset;
- ip = mtod(m, struct ip *);
+
+ while (ip_offset > m->m_len) {
+ ip_offset -= m->m_len;
+ m = m->m_next;
+ if (m) {
+ printf("in_delayed_cksum_withoffset failed - ip_offset wasn't in the packet\n");
+ return;
+ }
+ }
+
+ if (ip_offset + sizeof(struct ip) > m->m_len) {
+ printf("delayed m_pullup, m->len: %d off: %d\n",
+ m->m_len, ip_offset);
+ /*
+ * XXX
+ * this shouldn't happen
+ */
+ m = m_pullup(m, ip_offset + sizeof(struct ip));
+ }
+
+ /* Gross */
+ if (ip_offset) {
+ m->m_len -= ip_offset;
+ m->m_data += ip_offset;
+ }
+
+ ip = mtod(m, struct ip*);
offset = IP_VHL_HL(ip->ip_vhl) << 2 ;
csum = in_cksum_skip(m, ip->ip_len, offset);
if (m->m_pkthdr.csum_flags & CSUM_UDP && csum == 0)
csum = 0xffff;
offset += m->m_pkthdr.csum_data & 0xFFFF; /* checksum offset */
+
+ /* Gross */
+ if (ip_offset) {
+ if (M_LEADINGSPACE(m) < ip_offset)
+ panic("in_delayed_cksum_withoffset - chain modified!\n");
+ m->m_len += ip_offset;
+ m->m_data -= ip_offset;
+ }
if (offset > ip->ip_len) /* bogus offset */
return;
- if (offset + sizeof(u_short) > m->m_len) {
+ if (offset + ip_offset + sizeof(u_short) > m->m_len) {
printf("delayed m_pullup, m->len: %d off: %d p: %d\n",
- m->m_len, offset, ip->ip_p);
+ m->m_len, offset + ip_offset, ip->ip_p);
/*
* XXX
* this shouldn't happen, but if it does, the
* correct behavior may be to insert the checksum
* in the existing chain instead of rearranging it.
*/
- m = m_pullup(m, offset + sizeof(u_short));
+ m = m_pullup(m, offset + ip_offset + sizeof(u_short));
+ }
+ *(u_short *)(m->m_data + offset + ip_offset) = csum;
+}
+
+void
+in_delayed_cksum(struct mbuf *m)
+{
+ in_delayed_cksum_offset(m, 0);
+}
+
+void
+in_cksum_offset(struct mbuf* m, size_t ip_offset)
+{
+ struct ip* ip = NULL;
+ int hlen = 0;
+
+ while (ip_offset > m->m_len) {
+ ip_offset -= m->m_len;
+ m = m->m_next;
+ if (m) {
+ printf("in_cksum_offset failed - ip_offset wasn't in the packet\n");
+ return;
+ }
+ }
+
+ if (ip_offset + sizeof(struct ip) > m->m_len) {
+ printf("in_cksum_offset - delayed m_pullup, m->len: %d off: %d\n",
+ m->m_len, ip_offset);
+ /*
+ * XXX
+ * this shouldn't happen
+ */
+ m = m_pullup(m, ip_offset + sizeof(struct ip));
+ }
+
+ /* Gross */
+ if (ip_offset) {
+ m->m_len -= ip_offset;
+ m->m_data += ip_offset;
+ }
+
+ ip = mtod(m, struct ip*);
+
+#ifdef _IP_VHL
+ hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+#else
+ hlen = ip->ip_hl << 2;
+#endif
+
+ ip->ip_sum = 0;
+ ip->ip_sum = in_cksum(m, hlen);
+
+ /* Gross */
+ if (ip_offset) {
+ if (M_LEADINGSPACE(m) < ip_offset)
+ panic("in_cksum_offset - chain modified!\n");
+ m->m_len += ip_offset;
+ m->m_data -= ip_offset;
}
- *(u_short *)(m->m_data + offset) = csum;
}
/*
MGETHDR(n, M_DONTWAIT, MT_HEADER);
if (n == 0)
return (m);
- n->m_pkthdr.rcvif = (struct ifnet *)0;
+ n->m_pkthdr.rcvif = 0;
n->m_pkthdr.len = m->m_pkthdr.len + optlen;
m->m_len -= sizeof(struct ip);
m->m_data += sizeof(struct ip);
case IP_RECVRETOPTS:
case IP_RECVDSTADDR:
case IP_RECVIF:
+ case IP_RECVTTL:
#if defined(NFAITH) && NFAITH > 0
case IP_FAITH:
#endif
OPTSET(INP_RECVIF);
break;
+ case IP_RECVTTL:
+ OPTSET(INP_RECVTTL);
+ break;
+
#if defined(NFAITH) && NFAITH > 0
case IP_FAITH:
OPTSET(INP_FAITH);
struct mbuf *m;
int optname;
+ if (sopt->sopt_valsize > MCLBYTES) {
+ error = EMSGSIZE;
+ break;
+ }
if ((error = soopt_getm(sopt, &m)) != 0) /* XXX */
break;
if ((error = soopt_mcopyin(sopt, m)) != 0) /* XXX */
break;
priv = (sopt->sopt_p != NULL &&
- suser(sopt->sopt_p->p_ucred,
- &sopt->sopt_p->p_acflag) != 0) ? 0 : 1;
+ proc_suser(sopt->sopt_p) != 0) ? 0 : 1;
if (m) {
req = mtod(m, caddr_t);
len = m->m_len;
}
optname = sopt->sopt_name;
+ lck_mtx_lock(sadb_mutex);
error = ipsec4_set_policy(inp, optname, req, len, priv);
+ lck_mtx_unlock(sadb_mutex);
m_freem(m);
break;
}
case IP_RECVRETOPTS:
case IP_RECVDSTADDR:
case IP_RECVIF:
+ case IP_RECVTTL:
case IP_PORTRANGE:
#if defined(NFAITH) && NFAITH > 0
case IP_FAITH:
optval = OPTBIT(INP_RECVIF);
break;
+ case IP_RECVTTL:
+ optval = OPTBIT(INP_RECVTTL);
+ break;
+
case IP_PORTRANGE:
if (inp->inp_flags & INP_HIGHPORT)
optval = IP_PORTRANGE_HIGH;
req = mtod(m, caddr_t);
len = m->m_len;
}
+ lck_mtx_lock(sadb_mutex);
error = ipsec4_get_policy(sotoinpcb(so), req, len, &m);
+ lck_mtx_unlock(sadb_mutex);
if (error == 0)
error = soopt_mcopyout(sopt, m); /* XXX */
if (error == 0)
*ifindexp = 0;
if (ntohl(a->s_addr) >> 24 == 0) {
ifindex = ntohl(a->s_addr) & 0xffffff;
- if (ifindex < 0 || if_index < ifindex)
+ ifnet_head_lock_shared();
+ if (ifindex < 0 || if_index < ifindex) {
+ ifnet_head_done();
return NULL;
+ }
ifp = ifindex2ifnet[ifindex];
+ ifnet_head_done();
if (ifindexp)
*ifindexp = ifindex;
} else {
struct ip_mreq mreq;
struct ifnet *ifp = NULL;
struct ip_moptions *imo = *imop;
- struct route ro;
- struct sockaddr_in *dst;
int ifindex;
- int s;
if (imo == NULL) {
/*
* No multicast option buffer attached to the pcb;
* allocate one and initialize to default values.
*/
- imo = (struct ip_moptions*) _MALLOC(sizeof(*imo), M_IPMOPTS,
- M_WAITOK);
-
- if (imo == NULL)
- return (ENOBUFS);
- *imop = imo;
- imo->imo_multicast_ifp = NULL;
- imo->imo_multicast_addr.s_addr = INADDR_ANY;
- imo->imo_multicast_vif = -1;
- imo->imo_multicast_ttl = IP_DEFAULT_MULTICAST_TTL;
- imo->imo_multicast_loop = IP_DEFAULT_MULTICAST_LOOP;
- imo->imo_num_memberships = 0;
+ error = ip_createmoptions(imop);
+ if (error != 0)
+ return error;
+ imo = *imop;
}
switch (sopt->sopt_name) {
* IP address. Find the interface and confirm that
* it supports multicasting.
*/
- s = splimp();
ifp = ip_multicast_if(&addr, &ifindex);
if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
- splx(s);
error = EADDRNOTAVAIL;
break;
}
imo->imo_multicast_addr = addr;
else
imo->imo_multicast_addr.s_addr = INADDR_ANY;
- splx(s);
break;
case IP_MULTICAST_TTL:
error = sooptcopyin(sopt, &mreq, sizeof mreq, sizeof mreq);
if (error)
break;
-
- if (!IN_MULTICAST(ntohl(mreq.imr_multiaddr.s_addr))) {
- error = EINVAL;
- break;
- }
- s = splimp();
- /*
- * If no interface address was provided, use the interface of
- * the route to the given multicast address.
- */
- if (mreq.imr_interface.s_addr == INADDR_ANY) {
- bzero((caddr_t)&ro, sizeof(ro));
- dst = (struct sockaddr_in *)&ro.ro_dst;
- dst->sin_len = sizeof(*dst);
- dst->sin_family = AF_INET;
- dst->sin_addr = mreq.imr_multiaddr;
- rtalloc(&ro);
- if (ro.ro_rt != NULL) {
- ifp = ro.ro_rt->rt_ifp;
- rtfree(ro.ro_rt);
- }
- else {
- /* If there's no default route, try using loopback */
- mreq.imr_interface.s_addr = INADDR_LOOPBACK;
- }
- }
- if (ifp == NULL) {
- ifp = ip_multicast_if(&mreq.imr_interface, NULL);
- }
-
- /*
- * See if we found an interface, and confirm that it
- * supports multicast.
- */
- if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
- error = EADDRNOTAVAIL;
- splx(s);
- break;
- }
- /*
- * See if the membership already exists or if all the
- * membership slots are full.
- */
- for (i = 0; i < imo->imo_num_memberships; ++i) {
- if (imo->imo_membership[i]->inm_ifp == ifp &&
- imo->imo_membership[i]->inm_addr.s_addr
- == mreq.imr_multiaddr.s_addr)
- break;
- }
- if (i < imo->imo_num_memberships) {
- error = EADDRINUSE;
- splx(s);
- break;
- }
- if (i == IP_MAX_MEMBERSHIPS) {
- error = ETOOMANYREFS;
- splx(s);
- break;
- }
- /*
- * Everything looks good; add a new record to the multicast
- * address list for the given interface.
- */
- if ((imo->imo_membership[i] =
- in_addmulti(&mreq.imr_multiaddr, ifp)) == NULL) {
- error = ENOBUFS;
- splx(s);
- break;
- }
- ++imo->imo_num_memberships;
- splx(s);
+ error = ip_addmembership(imo, &mreq);
break;
case IP_DROP_MEMBERSHIP:
error = sooptcopyin(sopt, &mreq, sizeof mreq, sizeof mreq);
if (error)
break;
-
- if (!IN_MULTICAST(ntohl(mreq.imr_multiaddr.s_addr))) {
- error = EINVAL;
- break;
- }
-
- s = splimp();
- /*
- * If an interface address was specified, get a pointer
- * to its ifnet structure.
- */
- if (mreq.imr_interface.s_addr == INADDR_ANY)
- ifp = NULL;
- else {
- ifp = ip_multicast_if(&mreq.imr_interface, NULL);
- if (ifp == NULL) {
- error = EADDRNOTAVAIL;
- splx(s);
- break;
- }
- }
- /*
- * Find the membership in the membership array.
- */
- for (i = 0; i < imo->imo_num_memberships; ++i) {
- if ((ifp == NULL ||
- imo->imo_membership[i]->inm_ifp == ifp) &&
- imo->imo_membership[i]->inm_addr.s_addr ==
- mreq.imr_multiaddr.s_addr)
- break;
- }
- if (i == imo->imo_num_memberships) {
- error = EADDRNOTAVAIL;
- splx(s);
- break;
- }
- /*
- * Give up the multicast address record to which the
- * membership points.
- */
- in_delmulti(imo->imo_membership[i]);
- /*
- * Remove the gap in the membership array.
- */
- for (++i; i < imo->imo_num_memberships; ++i)
- imo->imo_membership[i-1] = imo->imo_membership[i];
- --imo->imo_num_memberships;
- splx(s);
+
+ error = ip_dropmembership(imo, &mreq);
break;
default:
return (error);
}
+/*
+ * Set the IP multicast options in response to user setsockopt().
+ */
+__private_extern__ int
+ip_createmoptions(
+ struct ip_moptions **imop)
+{
+ struct ip_moptions *imo;
+ imo = (struct ip_moptions*) _MALLOC(sizeof(*imo), M_IPMOPTS,
+ M_WAITOK);
+
+ if (imo == NULL)
+ return (ENOBUFS);
+ *imop = imo;
+ imo->imo_multicast_ifp = NULL;
+ imo->imo_multicast_addr.s_addr = INADDR_ANY;
+ imo->imo_multicast_vif = -1;
+ imo->imo_multicast_ttl = IP_DEFAULT_MULTICAST_TTL;
+ imo->imo_multicast_loop = IP_DEFAULT_MULTICAST_LOOP;
+ imo->imo_num_memberships = 0;
+
+ return 0;
+}
+
+/*
+ * Add membership to an IPv4 multicast.
+ */
+__private_extern__ int
+ip_addmembership(
+ struct ip_moptions *imo,
+ struct ip_mreq *mreq)
+{
+ struct route ro;
+ struct sockaddr_in *dst;
+ struct ifnet *ifp = NULL;
+ int error = 0;
+ int i;
+
+ if (!IN_MULTICAST(ntohl(mreq->imr_multiaddr.s_addr))) {
+ error = EINVAL;
+ return error;
+ }
+ /*
+ * If no interface address was provided, use the interface of
+ * the route to the given multicast address.
+ */
+ if (mreq->imr_interface.s_addr == INADDR_ANY) {
+ bzero((caddr_t)&ro, sizeof(ro));
+ dst = (struct sockaddr_in *)&ro.ro_dst;
+ dst->sin_len = sizeof(*dst);
+ dst->sin_family = AF_INET;
+ dst->sin_addr = mreq->imr_multiaddr;
+ rtalloc(&ro);
+ if (ro.ro_rt != NULL) {
+ ifp = ro.ro_rt->rt_ifp;
+ rtfree(ro.ro_rt);
+ }
+ else {
+ /* If there's no default route, try using loopback */
+ mreq->imr_interface.s_addr = INADDR_LOOPBACK;
+ }
+ }
+
+ if (ifp == NULL) {
+ ifp = ip_multicast_if(&mreq->imr_interface, NULL);
+ }
+
+ /*
+ * See if we found an interface, and confirm that it
+ * supports multicast.
+ */
+ if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
+ error = EADDRNOTAVAIL;
+ return error;
+ }
+ /*
+ * See if the membership already exists or if all the
+ * membership slots are full.
+ */
+ for (i = 0; i < imo->imo_num_memberships; ++i) {
+ if (imo->imo_membership[i]->inm_ifp == ifp &&
+ imo->imo_membership[i]->inm_addr.s_addr
+ == mreq->imr_multiaddr.s_addr)
+ break;
+ }
+ if (i < imo->imo_num_memberships) {
+ error = EADDRINUSE;
+ return error;
+ }
+ if (i == IP_MAX_MEMBERSHIPS) {
+ error = ETOOMANYREFS;
+ return error;
+ }
+ /*
+ * Everything looks good; add a new record to the multicast
+ * address list for the given interface.
+ */
+ if ((imo->imo_membership[i] =
+ in_addmulti(&mreq->imr_multiaddr, ifp)) == NULL) {
+ error = ENOBUFS;
+ return error;
+ }
+ ++imo->imo_num_memberships;
+
+ return error;
+}
+
+/*
+ * Drop membership of an IPv4 multicast.
+ */
+__private_extern__ int
+ip_dropmembership(
+ struct ip_moptions *imo,
+ struct ip_mreq *mreq)
+{
+ int error = 0;
+ struct ifnet* ifp = NULL;
+ int i;
+
+ if (!IN_MULTICAST(ntohl(mreq->imr_multiaddr.s_addr))) {
+ error = EINVAL;
+ return error;
+ }
+
+ /*
+ * If an interface address was specified, get a pointer
+ * to its ifnet structure.
+ */
+ if (mreq->imr_interface.s_addr == INADDR_ANY)
+ ifp = NULL;
+ else {
+ ifp = ip_multicast_if(&mreq->imr_interface, NULL);
+ if (ifp == NULL) {
+ error = EADDRNOTAVAIL;
+ return error;
+ }
+ }
+ /*
+ * Find the membership in the membership array.
+ */
+ for (i = 0; i < imo->imo_num_memberships; ++i) {
+ if ((ifp == NULL ||
+ imo->imo_membership[i]->inm_ifp == ifp) &&
+ imo->imo_membership[i]->inm_addr.s_addr ==
+ mreq->imr_multiaddr.s_addr)
+ break;
+ }
+ if (i == imo->imo_num_memberships) {
+ error = EADDRNOTAVAIL;
+ return error;
+ }
+ /*
+ * Give up the multicast address record to which the
+ * membership points.
+ */
+ in_delmulti(&imo->imo_membership[i]);
+ /*
+ * Remove the gap in the membership array.
+ */
+ for (++i; i < imo->imo_num_memberships; ++i)
+ imo->imo_membership[i-1] = imo->imo_membership[i];
+ --imo->imo_num_memberships;
+
+ return error;
+}
+
/*
* Return the IP multicast options in response to user getsockopt().
*/
if (imo != NULL) {
for (i = 0; i < imo->imo_num_memberships; ++i)
- if (imo->imo_membership[i] != NULL)
- in_delmulti(imo->imo_membership[i]);
+ in_delmulti(&imo->imo_membership[i]);
FREE(imo, M_IPMOPTS);
}
}
* The UDP checksum has not been calculated yet.
*/
if (copym->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
- if (ifp->if_hwassist) {
+ if (IF_HWASSIST_CSUM_FLAGS(ifp->if_hwassist)) {
copym->m_pkthdr.csum_flags |=
CSUM_DATA_VALID | CSUM_PSEUDO_HDR |
CSUM_IP_CHECKED | CSUM_IP_VALID;
* a filter has tapped-in.
*/
- if (lo_dl_tag == 0)
- dlil_find_dltag(APPLE_IF_FAM_LOOPBACK, 0, PF_INET, &lo_dl_tag);
-
/*
* Stuff the 'real' ifp into the pkthdr, to be used in matching
* in ip_input(); we need the loopback ifp/dl_tag passed as args
* to make the loopback driver compliant with the data link
* requirements.
*/
- if (lo_dl_tag) {
+ if (lo_ifp) {
copym->m_pkthdr.rcvif = ifp;
- dlil_output(lo_dl_tag, copym, 0, (struct sockaddr *) dst, 0);
+ dlil_output(lo_ifp, PF_INET, copym, 0, (struct sockaddr *) dst, 0);
} else {
printf("Warning: ip_output call to dlil_find_dltag failed!\n");
m_freem(copym);
projects / apple / xnu.git / blobdiff