/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * 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. 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1982, 1986, 1988, 1990, 1993
* @(#)ip_output.c 8.3 (Berkeley) 1/21/94
* $FreeBSD: src/sys/netinet/ip_output.c,v 1.99.2.16 2001/07/19 06:37:26 kris Exp $
*/
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
#define _IP_VHL
#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>
+
+#if CONFIG_MACF_NET
+#include <security/mac_framework.h>
+#endif
+
#include "faith.h"
#include <net/dlil.h>
#include <sys/kdebug.h>
+#include <libkern/OSAtomic.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
+#define SWAP16(v) ((((v) & 0xff) << 8) | ((v) >> 8))
#if IPSEC
#include <netinet6/ipsec.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
+
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 **));
+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 **);
+
+static void ip_out_cksum_stats(int, u_int32_t);
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 __P((struct ip *, struct ip *));
-extern int (*fr_checkp) __P((struct ip *, int, struct ifnet *, int, struct mbuf **));
-#ifdef __APPLE__
-extern struct mbuf* m_dup(register struct mbuf *m, int how);
-#endif
+int ip_optcopy(struct ip *, struct ip *);
+void in_delayed_cksum_offset(struct mbuf *, int );
+void in_cksum_offset(struct mbuf* , size_t );
-static u_long lo_dl_tag = 0;
+extern int (*fr_checkp)(struct ip *, int, struct ifnet *, int, struct mbuf **);
-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");
+#if DEBUG
+static int forge_ce = 0;
+SYSCTL_INT(_net_inet_ip, OID_AUTO, forge_ce, CTLFLAG_RW,
+ &forge_ce, 0, "Forge ECN CE");
+#endif /* DEBUG */
/*
* 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,
+ struct ifnet *ifp)
+{
+ int error;
+ error = ip_output_list(m0, 0, opt, ro, flags, imo, ifp);
+ return error;
+}
+
+/*
+ * Returns: 0 Success
+ * ENOMEM
+ * EADDRNOTAVAIL
+ * ENETUNREACH
+ * EHOSTUNREACH
+ * EACCES
+ * EMSGSIZE
+ * ENOBUFS
+ * ipsec4_getpolicybyaddr:??? [IPSEC 4th argument, contents modified]
+ * ipsec4_getpolicybysock:??? [IPSEC 4th argument, contents modified]
+ * key_spdacquire:??? [IPSEC]
+ * ipsec4_output:??? [IPSEC]
+ * <fr_checkp>:??? [firewall]
+ * ip_dn_io_ptr:??? [dummynet]
+ * dlil_output:??? [DLIL]
+ * dlil_output_list:??? [DLIL]
+ *
+ * Notes: The ipsec4_getpolicyby{addr|sock} function error returns are
+ * only used as the error return from this function where one of
+ * these functions fails to return a policy.
+ */
+int
+ip_output_list(
+ struct mbuf *m0,
+ int packetchain,
+ struct mbuf *opt,
+ struct route *ro,
+ int flags,
+ struct ip_moptions *imo,
+#if CONFIG_FORCE_OUT_IFP
+ struct ifnet *pdp_ifp
+#else
+ __unused struct ifnet *unused_ifp
+#endif
+ )
{
struct ip *ip, *mhip;
struct ifnet *ifp = NULL;
struct mbuf *m = m0;
int hlen = sizeof (struct ip);
- int len, off, error = 0;
+ int len = 0, off, error = 0;
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;
+#if IPFIREWALL
+ struct ip_fw_args args;
#endif
+ int didfilter = 0;
+ ipfilter_t inject_filter_ref = 0;
+ struct m_tag *tag;
+ struct route saved_route;
+ struct mbuf * packetlist;
+ int pktcnt = 0;
+
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 && (flags & IP_NOIPSEC) == 0) {
- so = ipsec_getsocket(m);
- (void)ipsec_setsocket(m, NULL);
- }
+ packetlist = m0;
+#if IPFIREWALL
+ args.next_hop = NULL;
+ args.eh = NULL;
+ args.rule = 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;
+ saved_route = dn_tag->ro;
+ ro = &saved_route;
+
+ imo = NULL;
+ dst = dn_tag->dn_dst;
+ ifp = dn_tag->ifp;
+ flags = dn_tag->flags;
+
+ m_tag_delete(m0, tag);
+ }
+#endif /* DUMMYNET */
+
+#if IPDIVERT
+ 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);
+ }
+#endif /* IPDIVERT */
+
+ 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);
+ }
+#endif /* IPFIREWALL */
+
+ 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 IPFIREWALL
+ 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)
+ lck_mtx_lock(rt_mtx);
+ 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);
+ lck_mtx_unlock(rt_mtx);
+#if IPSEC
+ if (ipsec_bypass == 0 && (flags & IP_NOIPSEC) == 0) {
+ so = ipsec_getsocket(m);
+ (void)ipsec_setsocket(m, NULL);
+ }
#endif
+ goto sendit;
+ }
+#endif /* IPFIREWALL */
+
#if IPSEC
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 *);
+#if IPFIREWALL
+ pkt_dst = args.next_hop ? args.next_hop->sin_addr : ip->ip_dst;
+#else
+ pkt_dst = ip->ip_dst;
+#endif
+
/*
* Fill in IP header.
*/
#else
ip->ip_id = htons(ip_id++);
#endif
- ipstat.ips_localout++;
+ OSAddAtomic(1, (SInt32*)&ipstat.ips_localout);
} else {
hlen = IP_VHL_HL(ip->ip_vhl) << 2;
}
+
+#if DEBUG
+ /* For debugging, we let the stack forge congestion */
+ if (forge_ce != 0 &&
+ ((ip->ip_tos & IPTOS_ECN_MASK) == IPTOS_ECN_ECT1 ||
+ (ip->ip_tos & IPTOS_ECN_MASK) == IPTOS_ECN_ECT0)) {
+ ip->ip_tos = (ip->ip_tos & ~IPTOS_ECN_MASK) | IPTOS_ECN_CE;
+ forge_ce--;
+ }
+#endif /* DEBUG */
KERNEL_DEBUG(DBG_LAYER_BEG, ip->ip_dst.s_addr,
ip->ip_src.s_addr, ip->ip_p, ip->ip_off, ip->ip_len);
-
+
dst = (struct sockaddr_in *)&ro->ro_dst;
/*
* 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) == NULL)) {
- error = EADDRNOTAVAIL;
- goto bad;
- }
- if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 ||
- dst->sin_family != AF_INET ||
- dst->sin_addr.s_addr != ip->ip_dst.s_addr)) {
- rtfree(ro->ro_rt);
- ro->ro_rt = (struct rtentry *)0;
+ lck_mtx_lock(rt_mtx);
+ if (ro->ro_rt != NULL) {
+ if (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;
+ lck_mtx_unlock(rt_mtx);
+ goto bad;
+ }
+ if ((ro->ro_rt->rt_flags & RTF_UP) == 0 ||
+ dst->sin_family != AF_INET ||
+ dst->sin_addr.s_addr != pkt_dst.s_addr) {
+ rtfree_locked(ro->ro_rt);
+ ro->ro_rt = NULL;
+ }
+ if (ro->ro_rt && ro->ro_rt->generation_id != route_generation)
+ ro->ro_rt->generation_id = route_generation;
}
- if (ro->ro_rt == 0) {
+ if (ro->ro_rt == NULL) {
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) {
+ OSAddAtomic(1, (SInt32*)&ipstat.ips_noroute);
+ error = ENETUNREACH;
+ lck_mtx_unlock(rt_mtx);
+ goto bad;
+ }
}
ifp = ia->ia_ifp;
ip->ip_ttl = 1;
isbroadcast = in_broadcast(dst->sin_addr, ifp);
} else {
+
+#if CONFIG_FORCE_OUT_IFP
+ /* Check if this packet should be forced out a specific interface */
+ if (ro->ro_rt == 0 && pdp_ifp != NULL) {
+ pdp_context_route_locked(pdp_ifp, ro);
+
+ if (ro->ro_rt == NULL) {
+ OSAddAtomic(1, (UInt32*)&ipstat.ips_noroute);
+ error = EHOSTUNREACH;
+ lck_mtx_unlock(rt_mtx);
+ goto bad;
+ }
+ }
+#endif
+
/*
* If this is the case, we probably don't want to allocate
* a protocol-cloned route since we didn't get one from the
* the link layer, as this is probably required in all cases
* for correct operation (as it is for ARP).
*/
- if (ro->ro_rt == 0)
- rtalloc_ign(ro, RTF_PRCLONING);
+
if (ro->ro_rt == 0) {
- ipstat.ips_noroute++;
+ unsigned long ign = RTF_PRCLONING;
+ /*
+ * We make an exception here: if the destination
+ * address is INADDR_BROADCAST, allocate a protocol-
+ * cloned host route so that we end up with a route
+ * marked with the RTF_BROADCAST flag. Otherwise,
+ * we would end up referring to the default route,
+ * instead of creating a cloned host route entry.
+ * That would introduce inconsistencies between ULPs
+ * that allocate a route and those that don't. The
+ * RTF_BROADCAST route is important since we'd want
+ * to send out undirected IP broadcast packets using
+ * link-level broadcast address.
+ *
+ * This exception will no longer be necessary when
+ * the RTF_PRCLONING scheme is no longer present.
+ */
+ if (dst->sin_addr.s_addr == INADDR_BROADCAST)
+ ign &= ~RTF_PRCLONING;
+
+ rtalloc_ign_locked(ro, ign);
+ }
+ if (ro->ro_rt == 0) {
+ OSAddAtomic(1, (SInt32*)&ipstat.ips_noroute);
error = EHOSTUNREACH;
+ lck_mtx_unlock(rt_mtx);
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;
ro->ro_rt->rt_use++;
if (ro->ro_rt->rt_flags & RTF_GATEWAY)
else
isbroadcast = in_broadcast(dst->sin_addr, ifp);
}
- if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
+ lck_mtx_unlock(rt_mtx);
+ if (IN_MULTICAST(ntohl(pkt_dst.s_addr))) {
struct in_multi *inm;
m->m_flags |= M_MCAST;
if (imo->imo_multicast_ifp != NULL) {
ifp = imo->imo_multicast_ifp;
}
+#if MROUTING
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);
+#endif /* MROUTING */
} else
if ((flags & IP_RAWOUTPUT) == 0) ip->ip_ttl = IP_DEFAULT_MULTICAST_TTL;
/*
*/
if ((imo == NULL) || (imo->imo_multicast_vif == -1)) {
if ((ifp->if_flags & IFF_MULTICAST) == 0) {
- ipstat.ips_noroute++;
+ OSAddAtomic(1, (SInt32*)&ipstat.ips_noroute);
error = ENETUNREACH;
goto bad;
}
*/
if (ip->ip_src.s_addr == INADDR_ANY) {
register struct in_ifaddr *ia1;
-
+ lck_mtx_lock(rt_mtx);
TAILQ_FOREACH(ia1, &in_ifaddrhead, ia_link)
if (ia1->ia_ifp == ifp) {
ip->ip_src = IA_SIN(ia1)->sin_addr;
break;
}
+ lck_mtx_unlock(rt_mtx);
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;
+ }
+
+ ipf_ref();
+
+ /* 4135317 - always pass network byte order to filter */
+ HTONS(ip->ip_len);
+ HTONS(ip->ip_off);
+
+ 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();
+ goto bad;
+ }
+ }
+ }
+
+ /* set back to host byte order */
+ ip = mtod(m, struct ip *);
+ NTOHS(ip->ip_len);
+ NTOHS(ip->ip_off);
+
+ ipf_unref();
+ didfilter = 1;
+ }
ip_mloopback(ifp, m, dst, hlen);
}
+#if MROUTING
else {
/*
* If we are acting as a multicast router, perform
}
}
}
+#endif /* MROUTING */
/*
* Multicasts with a time-to-live of zero may be looped-
#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
}
}
+ if (!didfilter && !TAILQ_EMPTY(&ipv4_filters)) {
+ struct ipfilter *filter;
+ int seen = (inject_filter_ref == 0);
+
+ ipf_ref();
+
+ /* 4135317 - always pass network byte order to filter */
+ HTONS(ip->ip_len);
+ HTONS(ip->ip_off);
+
+ 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();
+ goto bad;
+ }
+ }
+ }
+
+ /* set back to host byte order */
+ ip = mtod(m, struct ip *);
+ NTOHS(ip->ip_len);
+ NTOHS(ip->ip_off);
+
+ ipf_unref();
+ }
+
#if IPSEC
/* temporary for testing only: bypass ipsec alltogether */
KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_START, 0,0,0,0,0);
+
/* get SP for this packet */
if (so == NULL)
sp = ipsec4_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND, flags, &error);
sp = ipsec4_getpolicybysock(m, IPSEC_DIR_OUTBOUND, so, &error);
if (sp == NULL) {
- ipsecstat.out_inval++;
+ IPSEC_STAT_INCREMENT(ipsecstat.out_inval);
KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 0,0,0,0,0);
goto bad;
}
/* check policy */
switch (sp->policy) {
case IPSEC_POLICY_DISCARD:
+ case IPSEC_POLICY_GENERATE:
/*
* This packet is just discarded.
*/
- ipsecstat.out_polvio++;
+ IPSEC_STAT_INCREMENT(ipsecstat.out_polvio);
KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 1,0,0,0,0);
goto bad;
HTONS(ip->ip_off);
error = ipsec4_output(&state, sp, flags);
-
+
m0 = m = state.m;
if (flags & IP_ROUTETOIF) {
#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) == NULL && ((flags & (IP_ROUTETOIF | IP_FORWARDING)) == 0)) {
+ lck_mtx_lock(rt_mtx);
+ if (ro->ro_rt && ro->ro_rt->generation_id != route_generation) {
+ if (ifa_foraddr(ip->ip_src.s_addr) == 0 && ((flags & (IP_ROUTETOIF | IP_FORWARDING)) == 0)) {
error = EADDRNOTAVAIL;
+ lck_mtx_unlock(rt_mtx);
KERNEL_DEBUG(DBG_FNC_IPSEC4_OUTPUT | DBG_FUNC_END, 5,0,0,0,0);
goto bad;
}
- rtfree(ro->ro_rt);
+ rtfree_locked(ro->ro_rt);
ro->ro_rt = NULL;
}
printf("ip_output: "
"can't update route after IPsec processing\n");
error = EHOSTUNREACH; /*XXX*/
+ lck_mtx_unlock(rt_mtx);
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;
}
+ lck_mtx_unlock(rt_mtx);
/* 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;
+
+ ipf_ref();
+
+ /* 4135317 - always pass network byte order to filter */
+ HTONS(ip->ip_len);
+ HTONS(ip->ip_off);
+
+ 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();
+ goto bad;
+ }
+ }
+ }
+
+ /* set back to host byte order */
+ ip = mtod(m, struct ip *);
+ NTOHS(ip->ip_len);
+ NTOHS(ip->ip_off);
+
+ ipf_unref();
+ }
skip_ipsec:
#endif /*IPSEC*/
+#if IPFIREWALL
/*
* IpHack's section.
* - Xlate: translate packet's addr/port (NAT).
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) {
goto done;
+ }
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;
+ 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)
goto done ;
}
ip = mtod(m, struct ip *);
- if (off == 0 && dst == old) /* common case */
+
+ if (off == 0 && dst == old) {/* common case */
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 */
#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) {
* 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;
- m->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);
+
+
+ /* 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
bcopy(dst, &ro_fwd->ro_dst, sizeof(*dst));
ro_fwd->ro_rt = 0;
- rtalloc_ign(ro_fwd, RTF_PRCLONING);
+ lck_mtx_lock(rt_mtx);
+ rtalloc_ign_locked(ro_fwd, RTF_PRCLONING);
if (ro_fwd->ro_rt == 0) {
- ipstat.ips_noroute++;
+ OSAddAtomic(1, (SInt32*)&ipstat.ips_noroute);
error = EHOSTUNREACH;
+ lck_mtx_unlock(rt_mtx);
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;
ro_fwd->ro_rt->rt_use++;
if (ro_fwd->ro_rt->rt_flags & RTF_GATEWAY)
(ro_fwd->ro_rt->rt_flags & RTF_BROADCAST);
else
isbroadcast = in_broadcast(dst->sin_addr, ifp);
- rtfree(ro->ro_rt);
+ rtfree_locked(ro->ro_rt);
ro->ro_rt = ro_fwd->ro_rt;
dst = (struct sockaddr_in *)&ro_fwd->ro_dst;
+ lck_mtx_unlock(rt_mtx);
/*
* If we added a default src ip earlier,
* 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 */
+ goto done;
}
+#endif /* IPFIREWALL */
pass:
#if __APPLE__
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++;
+ OSAddAtomic(1, (SInt32*)&ipstat.ips_badaddr);
m_freem(m);
- /*
- * Simply drop the packet just like a firewall -- we do not want the
- * the application to feel the pain, not yet...
- * Returning ENETUNREACH like ip6_output does in some similar cases
- * could startle the otherwise clueless process that specifies
+ /*
+ * 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;
goto done;
}
#endif
/* let the software handle any UDP or TCP checksums */
sw_csum |= (CSUM_DELAY_DATA & m->m_pkthdr.csum_flags);
}
+ } else if (apple_hwcksum_tx == 0) {
+ sw_csum |= (CSUM_DELAY_DATA | CSUM_DELAY_IP) &
+ m->m_pkthdr.csum_flags;
}
if (sw_csum & CSUM_DELAY_DATA) {
sw_csum &= ~CSUM_DELAY_DATA;
m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
}
-
- m->m_pkthdr.csum_flags &= IF_HWASSIST_CSUM_FLAGS(ifp->if_hwassist);
+
+ if (apple_hwcksum_tx != 0) {
+ m->m_pkthdr.csum_flags &=
+ IF_HWASSIST_CSUM_FLAGS(ifp->if_hwassist);
+ } else {
+ m->m_pkthdr.csum_flags = 0;
+ }
/*
* If small enough for interface, or the interface will take
*/
if ((u_short)ip->ip_len <= ifp->if_mtu ||
ifp->if_hwassist & CSUM_FRAGMENT) {
+ struct rtentry *rte;
+
HTONS(ip->ip_len);
HTONS(ip->ip_off);
ip->ip_sum = 0;
if (ipsec_bypass == 0 && (flags & IP_NOIPSEC) == 0)
ipsec_delaux(m);
#endif
-#if __APPLE__
- error = dlil_output(ifptodlt(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;
+ if (packetchain == 0) {
+ lck_mtx_lock(rt_mtx);
+ if ((rte = ro->ro_rt) != NULL)
+ rtref(rte);
+ lck_mtx_unlock(rt_mtx);
+ error = ifnet_output(ifp, PF_INET, m, rte,
+ (struct sockaddr *)dst);
+ if (rte != NULL)
+ rtfree(rte);
+ 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;
+ lck_mtx_lock(rt_mtx);
+ if ((rte = ro->ro_rt) != NULL)
+ rtref(rte);
+ lck_mtx_unlock(rt_mtx);
+ //send
+ error = ifnet_output(ifp, PF_INET, packetlist,
+ rte, (struct sockaddr *)dst);
+ if (rte != NULL)
+ rtfree(rte);
+ pktcnt = 0;
+ goto done;
+
+ }
+ m0 = m;
+ pktcnt++;
+ goto loopit;
+ }
}
/*
* Too large for interface; fragment if possible.
* them, there is no way for one to update all its
* routes when the MTU is changed.
*/
- if ((ro->ro_rt->rt_flags & (RTF_UP | RTF_HOST))
+
+ lck_mtx_lock(rt_mtx);
+ if (ro->ro_rt && (ro->ro_rt->rt_flags & (RTF_UP | RTF_HOST))
&& !(ro->ro_rt->rt_rmx.rmx_locks & RTV_MTU)
&& (ro->ro_rt->rt_rmx.rmx_mtu > ifp->if_mtu)) {
ro->ro_rt->rt_rmx.rmx_mtu = ifp->if_mtu;
}
- ipstat.ips_cantfrag++;
+ lck_mtx_unlock(rt_mtx);
+ OSAddAtomic(1, (SInt32*)&ipstat.ips_cantfrag);
goto bad;
}
len = (ifp->if_mtu - hlen) &~ 7;
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA &&
(ifp->if_hwassist & CSUM_IP_FRAGS) == 0) {
in_delayed_cksum(m);
- if (m == NULL)
- return(ENOMEM);
m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
}
m0 = m;
mhlen = sizeof (struct ip);
for (off = hlen + len; off < (u_short)ip->ip_len; off += len) {
- MGETHDR(m, M_DONTWAIT, MT_HEADER);
+ MGETHDR(m, M_DONTWAIT, MT_HEADER); /* MAC-OK */
if (m == 0) {
error = ENOBUFS;
- ipstat.ips_odropped++;
+ OSAddAtomic(1, (SInt32*)&ipstat.ips_odropped);
goto sendorfree;
}
m->m_flags |= (m0->m_flags & M_MCAST) | M_FRAG;
if (m->m_next == 0) {
(void) m_free(m);
error = ENOBUFS; /* ??? */
- ipstat.ips_odropped++;
+ OSAddAtomic(1, (SInt32*)&ipstat.ips_odropped);
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;
+#if CONFIG_MACF_NET
+ mac_netinet_fragment(m0, m);
+#endif
HTONS(mhip->ip_off);
mhip->ip_sum = 0;
if (sw_csum & CSUM_DELAY_IP) {
mnext = &m->m_nextpkt;
nfrags++;
}
- ipstat.ips_ofragments += nfrags;
+ OSAddAtomic(nfrags, (SInt32*)&ipstat.ips_ofragments);
/* set first/last markers for fragment chain */
m->m_flags |= M_LASTFRAG;
ipsec_delaux(m);
#endif
if (error == 0) {
+ struct rtentry *rte;
#ifndef __APPLE__
/* Record statistics for this interface address. */
if (ia != NULL) {
ia->ia_ifa.if_obytes += m->m_pkthdr.len;
}
#endif
-
-#if __APPLE__
- error = dlil_output(ifptodlt(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
+ if ((packetchain != 0) && (pktcnt > 0))
+ panic("ip_output: mix of packet in packetlist is wrong=%p", packetlist);
+ lck_mtx_lock(rt_mtx);
+ if ((rte = ro->ro_rt) != NULL)
+ rtref(rte);
+ lck_mtx_unlock(rt_mtx);
+ error = ifnet_output(ifp, PF_INET, m, rte,
+ (struct sockaddr *)dst);
+ if (rte != NULL)
+ rtfree(rte);
} else
m_freem(m);
}
if (error == 0)
- ipstat.ips_fragmented++;
+ OSAddAtomic(1, (SInt32*)&ipstat.ips_fragmented);
}
done:
+ if (ia) {
+ ifafree(&ia->ia_ifa);
+ ia = NULL;
+ }
#if IPSEC
if (ipsec_bypass == 0 && (flags & IP_NOIPSEC) == 0) {
if (ro == &iproute && ro->ro_rt) {
if (sp != NULL) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP ip_output call free SP:%x\n", sp));
- key_freesp(sp);
+ key_freesp(sp, KEY_SADB_UNLOCKED);
}
}
#endif /* IPSEC */
goto done;
}
+static void
+ip_out_cksum_stats(int proto, u_int32_t len)
+{
+ switch (proto) {
+ case IPPROTO_TCP:
+ tcp_out_cksum_stats(len);
+ break;
+ case IPPROTO_UDP:
+ udp_out_cksum_stats(len);
+ break;
+ default:
+ /* keep only TCP or UDP stats for now */
+ break;
+ }
+}
+
void
-in_delayed_cksum(struct mbuf *m)
+in_delayed_cksum_offset(struct mbuf *m0, int ip_offset)
{
struct ip *ip;
- u_short csum, offset;
- ip = mtod(m, struct ip *);
+ unsigned char buf[sizeof(struct ip)];
+ u_short csum, offset, ip_len;
+ struct mbuf *m = m0;
+
+ while (ip_offset >= m->m_len) {
+ ip_offset -= m->m_len;
+ m = m->m_next;
+ if (m == NULL) {
+ printf("in_delayed_cksum_withoffset failed - ip_offset wasn't in the packet\n");
+ return;
+ }
+ }
+
+ /* Sometimes the IP header is not contiguous, yes this can happen! */
+ if (ip_offset + sizeof(struct ip) > m->m_len) {
+#if DEBUG
+ printf("delayed m_pullup, m->len: %ld off: %d\n",
+ m->m_len, ip_offset);
+#endif
+ m_copydata(m, ip_offset, sizeof(struct ip), (caddr_t) buf);
+
+ ip = (struct ip *)buf;
+ } else {
+ ip = (struct ip*)(m->m_data + ip_offset);
+ }
+
+ /* Gross */
+ if (ip_offset) {
+ m->m_len -= ip_offset;
+ m->m_data += ip_offset;
+ }
+
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)
+
+ /*
+ * We could be in the context of an IP or interface filter; in the
+ * former case, ip_len would be in host (correct) order while for
+ * the latter it would be in network order. Because of this, we
+ * attempt to interpret the length field by comparing it against
+ * the actual packet length. If the comparison fails, byte swap
+ * the length and check again. If it still fails, then the packet
+ * is bogus and we give up.
+ */
+ ip_len = ip->ip_len;
+ if (ip_len != (m0->m_pkthdr.len - ip_offset)) {
+ ip_len = SWAP16(ip_len);
+ if (ip_len != (m0->m_pkthdr.len - ip_offset)) {
+ printf("in_delayed_cksum_offset: ip_len %d (%d) "
+ "doesn't match actual length %d\n", ip->ip_len,
+ ip_len, (m0->m_pkthdr.len - ip_offset));
+ return;
+ }
+ }
+
+ csum = in_cksum_skip(m, ip_len, offset);
+
+ /* Update stats */
+ ip_out_cksum_stats(ip->ip_p, ip_len - offset);
+
+ if (m0->m_pkthdr.csum_flags & CSUM_UDP && csum == 0)
csum = 0xffff;
- offset += m->m_pkthdr.csum_data & 0xFFFF; /* checksum offset */
+ offset += m0->m_pkthdr.csum_data & 0xFFFF; /* checksum offset */
+
+ /* Gross */
+ if (ip_offset) {
+ if (M_LEADINGSPACE(m) < ip_offset)
+ panic("in_delayed_cksum_offset - chain modified!\n");
+ m->m_len += ip_offset;
+ m->m_data -= ip_offset;
+ }
- if (offset > ip->ip_len) /* bogus offset */
+ if (offset > ip_len) /* bogus offset */
return;
- if (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);
- /*
- * 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));
+ /* Insert the checksum in the existing chain */
+ if (offset + ip_offset + sizeof(u_short) > m->m_len) {
+ char tmp[2];
+
+#if DEBUG
+ printf("delayed m_copyback, m->len: %ld off: %d p: %d\n",
+ m->m_len, offset + ip_offset, ip->ip_p);
+#endif
+ *(u_short *)tmp = csum;
+ m_copyback(m, offset + ip_offset, 2, tmp);
+ } else
+ *(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;
+ unsigned char buf[sizeof(struct ip)];
+ int swapped = 0;
+
+ while (ip_offset >= m->m_len) {
+ ip_offset -= m->m_len;
+ m = m->m_next;
+ if (m == NULL) {
+ printf("in_cksum_offset failed - ip_offset wasn't in the packet\n");
+ return;
+ }
+ }
+
+ /* Sometimes the IP header is not contiguous, yes this can happen! */
+ if (ip_offset + sizeof(struct ip) > m->m_len) {
+
+#if DEBUG
+ printf("in_cksum_offset - delayed m_pullup, m->len: %ld off: %lu\n",
+ m->m_len, ip_offset);
+#endif
+ m_copydata(m, ip_offset, sizeof(struct ip), (caddr_t) buf);
+
+ ip = (struct ip *)buf;
+ ip->ip_sum = 0;
+ m_copyback(m, ip_offset + offsetof(struct ip, ip_sum), 2, (caddr_t)&ip->ip_sum);
+ } else {
+ ip = (struct ip*)(m->m_data + ip_offset);
+ ip->ip_sum = 0;
+ }
+
+ /* Gross */
+ if (ip_offset) {
+ m->m_len -= ip_offset;
+ m->m_data += ip_offset;
+ }
+
+#ifdef _IP_VHL
+ hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+#else
+ hlen = ip->ip_hl << 2;
+#endif
+ /*
+ * We could be in the context of an IP or interface filter; in the
+ * former case, ip_len would be in host order while for the latter
+ * it would be in network (correct) order. Because of this, we
+ * attempt to interpret the length field by comparing it against
+ * the actual packet length. If the comparison fails, byte swap
+ * the length and check again. If it still fails, then the packet
+ * is bogus and we give up.
+ */
+ if (ntohs(ip->ip_len) != (m->m_pkthdr.len - ip_offset)) {
+ ip->ip_len = SWAP16(ip->ip_len);
+ swapped = 1;
+ if (ntohs(ip->ip_len) != (m->m_pkthdr.len - ip_offset)) {
+ ip->ip_len = SWAP16(ip->ip_len);
+ printf("in_cksum_offset: ip_len %d (%d) "
+ "doesn't match actual length %lu\n",
+ ip->ip_len, SWAP16(ip->ip_len),
+ (m->m_pkthdr.len - ip_offset));
+ return;
+ }
+ }
+
+ ip->ip_sum = 0;
+ ip->ip_sum = in_cksum(m, hlen);
+ if (swapped)
+ ip->ip_len = SWAP16(ip->ip_len);
+
+ /* 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;
+ }
+
+ /* Insert the checksum in the existing chain if IP header not contiguous */
+ if (ip_offset + sizeof(struct ip) > m->m_len) {
+ char tmp[2];
+
+#if DEBUG
+ printf("in_cksum_offset m_copyback, m->len: %lu off: %lu p: %d\n",
+ m->m_len, ip_offset + offsetof(struct ip, ip_sum), ip->ip_p);
+#endif
+ *(u_short *)tmp = ip->ip_sum;
+ m_copyback(m, ip_offset + offsetof(struct ip, ip_sum), 2, tmp);
}
- *(u_short *)(m->m_data + offset) = csum;
}
/*
if (p->ipopt_dst.s_addr)
ip->ip_dst = p->ipopt_dst;
if (m->m_flags & M_EXT || m->m_data - optlen < m->m_pktdat) {
- MGETHDR(n, M_DONTWAIT, MT_HEADER);
+ MGETHDR(n, M_DONTWAIT, MT_HEADER); /* MAC-OK */
if (n == 0)
return (m);
- n->m_pkthdr.rcvif = (struct ifnet *)0;
+ n->m_pkthdr.rcvif = 0;
+#if CONFIG_MACF_NET
+ mac_mbuf_label_copy(m, n);
+#endif
n->m_pkthdr.len = m->m_pkthdr.len + optlen;
m->m_len -= sizeof(struct ip);
m->m_data += sizeof(struct ip);
break;
#undef OPTSET
+#if CONFIG_FORCE_OUT_IFP
+ case IP_FORCE_OUT_IFP: {
+ char ifname[IFNAMSIZ];
+ ifnet_t ifp;
+
+ /* Verify interface name parameter is sane */
+ if (sopt->sopt_valsize > sizeof(ifname)) {
+ error = EINVAL;
+ break;
+ }
+
+ /* Copy the interface name */
+ if (sopt->sopt_valsize != 0) {
+ error = sooptcopyin(sopt, ifname, sizeof(ifname), sopt->sopt_valsize);
+ if (error)
+ break;
+ }
+
+ if (sopt->sopt_valsize == 0 || ifname[0] == 0) {
+ // Set pdp_ifp to NULL
+ inp->pdp_ifp = NULL;
+
+ // Flush the route
+ if (inp->inp_route.ro_rt) {
+ rtfree(inp->inp_route.ro_rt);
+ inp->inp_route.ro_rt = NULL;
+ }
+
+ break;
+ }
+
+ /* Verify name is NULL terminated */
+ if (ifname[sopt->sopt_valsize - 1] != 0) {
+ error = EINVAL;
+ break;
+ }
+
+ if (ifnet_find_by_name(ifname, &ifp) != 0) {
+ error = ENXIO;
+ break;
+ }
+
+ /* Won't actually free. Since we don't release this later, we should do it now. */
+ ifnet_release(ifp);
+
+ /* This only works for point-to-point interfaces */
+ if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
+ error = ENOTSUP;
+ break;
+ }
+
+ inp->pdp_ifp = ifp;
+ }
+ break;
+#endif
case IP_MULTICAST_IF:
case IP_MULTICAST_VIF:
case IP_MULTICAST_TTL:
struct mbuf *m;
int optname;
- if (sopt->sopt_valsize > MCLBYTES) {
- error = EMSGSIZE;
- break;
- }
-
+ 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;
}
#endif /*IPSEC*/
+#if TRAFFIC_MGT
+ case IP_TRAFFIC_MGT_BACKGROUND:
+ {
+ unsigned background = 0;
+ error = sooptcopyin(sopt, &background, sizeof(background), sizeof(background));
+ if (error)
+ break;
+
+ if (background)
+ so->so_traffic_mgt_flags |= TRAFFIC_MGT_SO_BACKGROUND;
+ else
+ so->so_traffic_mgt_flags &= ~TRAFFIC_MGT_SO_BACKGROUND;
+
+ break;
+ }
+#endif /* TRAFFIC_MGT */
+
default:
error = ENOPROTOOPT;
break;
}
#endif /*IPSEC*/
+#if TRAFFIC_MGT
+ case IP_TRAFFIC_MGT_BACKGROUND:
+ {
+ unsigned background = so->so_traffic_mgt_flags;
+ return (sooptcopyout(sopt, &background, sizeof(background)));
+ break;
+ }
+#endif /* TRAFFIC_MGT */
+
default:
error = ENOPROTOOPT;
break;
* with destination address if source routed.
*/
static int
-ip_pcbopts(optname, pcbopt, m)
- int optname;
- struct mbuf **pcbopt;
- register struct mbuf *m;
+ip_pcbopts(
+ __unused int optname,
+ struct mbuf **pcbopt,
+ register struct mbuf *m)
{
register int cnt, optlen;
register u_char *cp;
*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 ifnet *ifp = NULL;
struct ip_moptions *imo = *imop;
int ifindex;
- int s;
if (imo == NULL) {
/*
switch (sopt->sopt_name) {
/* store an index number for the vif you wanna use in the send */
+#if MROUTING
case IP_MULTICAST_VIF:
if (legal_vif_num == 0) {
error = EOPNOTSUPP;
}
imo->imo_multicast_vif = i;
break;
+#endif /* MROUTING */
case IP_MULTICAST_IF:
/*
* 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:
* If all options have default values, no need to keep the mbuf.
*/
if (imo->imo_multicast_ifp == NULL &&
- imo->imo_multicast_vif == -1 &&
+ imo->imo_multicast_vif == (u_long)-1 &&
imo->imo_multicast_ttl == IP_DEFAULT_MULTICAST_TTL &&
imo->imo_multicast_loop == IP_DEFAULT_MULTICAST_LOOP &&
imo->imo_num_memberships == 0) {
struct sockaddr_in *dst;
struct ifnet *ifp = NULL;
int error = 0;
- int s = 0;
int i;
if (!IN_MULTICAST(ntohl(mreq->imr_multiaddr.s_addr))) {
error = EINVAL;
return error;
}
- s = splimp();
/*
* If no interface address was provided, use the interface of
* the route to the given multicast address.
dst->sin_len = sizeof(*dst);
dst->sin_family = AF_INET;
dst->sin_addr = mreq->imr_multiaddr;
- rtalloc(&ro);
+ lck_mtx_lock(rt_mtx);
+ rtalloc_ign_locked(&ro, 0UL);
if (ro.ro_rt != NULL) {
ifp = ro.ro_rt->rt_ifp;
- rtfree(ro.ro_rt);
+ rtfree_locked(ro.ro_rt);
}
else {
/* If there's no default route, try using loopback */
mreq->imr_interface.s_addr = INADDR_LOOPBACK;
}
+ lck_mtx_unlock(rt_mtx);
}
if (ifp == NULL) {
*/
if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
error = EADDRNOTAVAIL;
- splx(s);
return error;
}
/*
}
if (i < imo->imo_num_memberships) {
error = EADDRINUSE;
- splx(s);
return error;
}
if (i == IP_MAX_MEMBERSHIPS) {
error = ETOOMANYREFS;
- splx(s);
return error;
}
/*
if ((imo->imo_membership[i] =
in_addmulti(&mreq->imr_multiaddr, ifp)) == NULL) {
error = ENOBUFS;
- splx(s);
return error;
}
++imo->imo_num_memberships;
- splx(s);
return error;
}
struct ip_mreq *mreq)
{
int error = 0;
- int s = 0;
struct ifnet* ifp = NULL;
int i;
return error;
}
- s = splimp();
/*
* If an interface address was specified, get a pointer
* to its ifnet structure.
ifp = ip_multicast_if(&mreq->imr_interface, NULL);
if (ifp == NULL) {
error = EADDRNOTAVAIL;
- splx(s);
return error;
}
}
}
if (i == imo->imo_num_memberships) {
error = EADDRNOTAVAIL;
- splx(s);
return error;
}
/*
* Give up the multicast address record to which the
* membership points.
*/
- in_delmulti(imo->imo_membership[i]);
+ 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);
return error;
}
error = 0;
switch (sopt->sopt_name) {
+#if MROUTING
case IP_MULTICAST_VIF:
if (imo != NULL)
optval = imo->imo_multicast_vif;
optval = -1;
error = sooptcopyout(sopt, &optval, sizeof optval);
break;
+#endif /* MROUTING */
case IP_MULTICAST_IF:
if (imo == NULL || imo->imo_multicast_ifp == NULL)
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);
}
}
{
register struct ip *ip;
struct mbuf *copym;
+ int sw_csum = (apple_hwcksum_tx == 0);
copym = m_copy(m, 0, M_COPYALL);
if (copym != NULL && (copym->m_flags & M_EXT || copym->m_len < hlen))
copym = m_pullup(copym, hlen);
- if (copym != NULL) {
- /*
- * We don't bother to fragment if the IP length is greater
- * than the interface's MTU. Can this possibly matter?
- */
- ip = mtod(copym, struct ip *);
- HTONS(ip->ip_len);
- HTONS(ip->ip_off);
- ip->ip_sum = 0;
- ip->ip_sum = in_cksum(copym, hlen);
- /*
- * NB:
- * It's not clear whether there are any lingering
- * reentrancy problems in other areas which might
- * be exposed by using ip_input directly (in
- * particular, everything which modifies the packet
- * in-place). Yet another option is using the
- * protosw directly to deliver the looped back
- * packet. For the moment, we'll err on the side
- * of safety by using if_simloop().
- */
+
+ if (copym == NULL)
+ return;
+
+ /*
+ * We don't bother to fragment if the IP length is greater
+ * than the interface's MTU. Can this possibly matter?
+ */
+ ip = mtod(copym, struct ip *);
+ HTONS(ip->ip_len);
+ HTONS(ip->ip_off);
+ ip->ip_sum = 0;
+ ip->ip_sum = in_cksum(copym, hlen);
+ /*
+ * NB:
+ * It's not clear whether there are any lingering
+ * reentrancy problems in other areas which might
+ * be exposed by using ip_input directly (in
+ * particular, everything which modifies the packet
+ * in-place). Yet another option is using the
+ * protosw directly to deliver the looped back
+ * packet. For the moment, we'll err on the side
+ * of safety by using if_simloop().
+ */
#if 1 /* XXX */
- if (dst->sin_family != AF_INET) {
- printf("ip_mloopback: bad address family %d\n",
- dst->sin_family);
- dst->sin_family = AF_INET;
- }
+ if (dst->sin_family != AF_INET) {
+ printf("ip_mloopback: bad address family %d\n",
+ dst->sin_family);
+ dst->sin_family = AF_INET;
+ }
#endif
-
/*
- * Mark checksum as valid or calculate checksum for loopback.
- *
- * This is done this way because we have to embed the ifp of
- * the interface we will send the original copy of the packet
- * out on in the mbuf. ip_input will check if_hwassist of the
- * embedded ifp and ignore all csum_flags if if_hwassist is 0.
- * The UDP checksum has not been calculated yet.
- */
- if (copym->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
- 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;
- copym->m_pkthdr.csum_data = 0xffff;
- } else {
- NTOHS(ip->ip_len);
- in_delayed_cksum(copym);
- HTONS(ip->ip_len);
- }
- }
-
-
- /*
- * TedW:
- * We need to send all loopback traffic down to dlil in case
- * 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) {
- copym->m_pkthdr.rcvif = ifp;
- dlil_output(lo_dl_tag, copym, 0, (struct sockaddr *) dst, 0);
+ * Mark checksum as valid or calculate checksum for loopback.
+ *
+ * This is done this way because we have to embed the ifp of
+ * the interface we will send the original copy of the packet
+ * out on in the mbuf. ip_input will check if_hwassist of the
+ * embedded ifp and ignore all csum_flags if if_hwassist is 0.
+ * The UDP checksum has not been calculated yet.
+ */
+ if (sw_csum || (copym->m_pkthdr.csum_flags & CSUM_DELAY_DATA)) {
+ if (!sw_csum && IF_HWASSIST_CSUM_FLAGS(ifp->if_hwassist)) {
+ copym->m_pkthdr.csum_flags |=
+ CSUM_DATA_VALID | CSUM_PSEUDO_HDR |
+ CSUM_IP_CHECKED | CSUM_IP_VALID;
+ copym->m_pkthdr.csum_data = 0xffff;
} else {
- printf("Warning: ip_output call to dlil_find_dltag failed!\n");
- m_freem(copym);
+ NTOHS(ip->ip_len);
+ in_delayed_cksum(copym);
+ HTONS(ip->ip_len);
}
+ }
+
+ /*
+ * TedW:
+ * We need to send all loopback traffic down to dlil in case
+ * a filter has tapped-in.
+ */
-/* if_simloop(ifp, copym, (struct sockaddr *)dst, 0);*/
+ /*
+ * 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_ifp) {
+ copym->m_pkthdr.rcvif = ifp;
+ 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