/*
- * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2015 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-/* $FreeBSD: src/sys/netinet6/ip6_output.c,v 1.43 2002/10/31 19:45:48 ume Exp $ */
-/* $KAME: ip6_output.c,v 1.279 2002/01/26 06:12:30 jinmei Exp $ */
-
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
#include <sys/mcache.h>
#include <sys/sysctl.h>
#include <kern/zalloc.h>
+#include <libkern/OSByteOrder.h>
#include <pexpert/pexpert.h>
+#include <mach/sdt.h>
#include <net/if.h>
#include <net/route.h>
#include <net/dlil.h>
+#include <net/net_osdep.h>
+#include <net/net_perf.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
+#include <netinet/kpi_ipfilter_var.h>
+
#include <netinet6/ip6protosw.h>
#include <netinet/icmp6.h>
#include <netinet6/ip6_var.h>
#include <netinet/in_pcb.h>
#include <netinet6/nd6.h>
#include <netinet6/scope6_var.h>
-#include <mach/sdt.h>
-
#if IPSEC
#include <netinet6/ipsec.h>
-#if INET6
#include <netinet6/ipsec6.h>
-#endif
#include <netkey/key.h>
extern int ipsec_bypass;
#endif /* IPSEC */
+#if NECP
+#include <net/necp.h>
+#endif /* NECP */
+
#if CONFIG_MACF_NET
#include <security/mac.h>
-#endif /* MAC_NET */
-
-#include <netinet6/ip6_fw.h>
+#endif /* CONFIG_MACF_NET */
#if DUMMYNET
+#include <netinet6/ip6_fw.h>
#include <netinet/ip_fw.h>
#include <netinet/ip_dummynet.h>
#endif /* DUMMYNET */
-#include <net/net_osdep.h>
-
-#include <netinet/kpi_ipfilter_var.h>
-
#if PF
#include <net/pfvar.h>
#endif /* PF */
-#ifndef __APPLE__
-static MALLOC_DEFINE(M_IPMOPTS, "ip6_moptions", "internet multicast options");
-#endif
-
-int ip6_raw_ctloutput(struct socket *so, struct sockopt *sopt);
-static int ip6_pcbopts(struct ip6_pktopts **, struct mbuf *,
- struct socket *, struct sockopt *sopt);
-static int ip6_pcbopt(int optname, u_char *buf, int len, struct ip6_pktopts **pktopt, int uproto);
-static int ip6_getpcbopt(struct ip6_pktopts *pktopt, int optname, struct sockopt *sopt);
-static int ip6_setpktopt(int optname, u_char *buf, int len, struct ip6_pktopts *opt, int sticky, int cmsg, int uproto);
-static void im6o_trace(struct ip6_moptions *, int);
+static int sysctl_reset_ip6_output_stats SYSCTL_HANDLER_ARGS;
+static int sysctl_ip6_output_measure_bins SYSCTL_HANDLER_ARGS;
+static int sysctl_ip6_output_getperf SYSCTL_HANDLER_ARGS;
static int ip6_copyexthdr(struct mbuf **, caddr_t, int);
-static int ip6_insertfraghdr(struct mbuf *, struct mbuf *, int,
- struct ip6_frag **);
+static void ip6_out_cksum_stats(int, u_int32_t);
static int ip6_insert_jumboopt(struct ip6_exthdrs *, u_int32_t);
+static int ip6_insertfraghdr(struct mbuf *, struct mbuf *, int,
+ struct ip6_frag **);
+static int ip6_getpmtu(struct route_in6 *, struct route_in6 *,
+ struct ifnet *, struct in6_addr *, u_int32_t *, boolean_t *);
+static int ip6_pcbopts(struct ip6_pktopts **, struct mbuf *, struct socket *,
+ struct sockopt *sopt);
+static int ip6_pcbopt(int, u_char *, int, struct ip6_pktopts **, int);
+static int ip6_getpcbopt(struct ip6_pktopts *, int, struct sockopt *);
+static int copypktopts(struct ip6_pktopts *, struct ip6_pktopts *, int);
+static void im6o_trace(struct ip6_moptions *, int);
+static int ip6_setpktopt(int, u_char *, int, struct ip6_pktopts *, int,
+ int, int);
static int ip6_splithdr(struct mbuf *, struct ip6_exthdrs *);
-static int ip6_getpmtu (struct route_in6 *, struct route_in6 *,
- struct ifnet *, struct in6_addr *, u_int32_t *, int *);
+static void ip6_output_checksum(struct ifnet *, uint32_t, struct mbuf *,
+ int, uint32_t, uint32_t);
+extern int udp_ctloutput(struct socket *, struct sockopt *);
+static int ip6_do_fragmentation(struct mbuf **morig,
+ uint32_t optlen, struct ifnet *ifp, uint32_t unfragpartlen,
+ struct ip6_hdr *ip6, struct ip6_exthdrs *exthdrsp, uint32_t mtu,
+ int nxt0);
+static int ip6_fragment_packet(struct mbuf **m,
+ struct ip6_pktopts *opt, struct ip6_exthdrs *exthdrsp, struct ifnet *ifp,
+ uint32_t mtu, boolean_t alwaysfrag, uint32_t unfragpartlen,
+ struct route_in6 *ro_pmtu, int nxt0, uint32_t optlen);
+
+SYSCTL_DECL(_net_inet6_ip6);
+
+static int ip6_output_measure = 0;
+SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, output_perf,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &ip6_output_measure, 0, sysctl_reset_ip6_output_stats, "I", "Do time measurement");
+
+static uint64_t ip6_output_measure_bins = 0;
+SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, output_perf_bins,
+ CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, &ip6_output_measure_bins, 0,
+ sysctl_ip6_output_measure_bins, "I",
+ "bins for chaining performance data histogram");
+
+static net_perf_t net_perf;
+SYSCTL_PROC(_net_inet6_ip6, OID_AUTO, output_perf_data,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
+ 0, 0, sysctl_ip6_output_getperf, "S,net_perf",
+ "IP6 output performance data (struct net_perf, net/net_perf.h)");
#define IM6O_TRACE_HIST_SIZE 32 /* size of trace history */
#define IM6O_ZONE_MAX 64 /* maximum elements in zone */
#define IM6O_ZONE_NAME "ip6_moptions" /* zone name */
-SYSCTL_DECL(_net_inet6_ip6);
-
-static int ip6_maxchainsent = 0;
-SYSCTL_INT(_net_inet6_ip6, OID_AUTO, maxchainsent, CTLFLAG_RW | CTLFLAG_LOCKED,
- &ip6_maxchainsent, 0, "use dlil_output_list");
-
/*
- * XXX we don't handle mbuf chains yet in nd6_output() so ip6_output_list() only
- * walks through the packet chain and sends each mbuf separately.
+ * ip6_output() calls ip6_output_list() to do the work
*/
int
-ip6_output_list(
- struct mbuf *m0,
- int packetlist,
- struct ip6_pktopts *opt,
- struct route_in6 *ro,
- int flags,
- struct ip6_moptions *im6o,
- struct ifnet **ifpp, /* XXX: just for statistics */
- struct ip6_out_args *ip6oap)
+ip6_output(struct mbuf *m0, struct ip6_pktopts *opt,
+ struct route_in6 *ro, int flags, struct ip6_moptions *im6o,
+ struct ifnet **ifpp, struct ip6_out_args *ip6oa)
{
-#pragma unused(packetlist)
- struct mbuf *m = m0, *nextpkt;
- int error = 0;
-
- while (m) {
- /*
- * Break the chain before calling ip6_output() and free the
- * mbufs if there was an error.
- */
- nextpkt = m->m_nextpkt;
- m->m_nextpkt = NULL;
- error = ip6_output(m, opt, ro, flags, im6o, ifpp, ip6oap);
- if (error) {
- if (nextpkt)
- m_freem_list(nextpkt);
- return (error);
- }
- m = nextpkt;
- }
-
- return (error);
+ return ip6_output_list(m0, 0, opt, ro, flags, im6o, ifpp, ip6oa);
}
/*
- * IP6 output. The packet in mbuf chain m contains a skeletal IP6
+ * IP6 output. Each packet in mbuf chain m contains a skeletal IP6
* header (with pri, len, nxt, hlim, src, dst).
* This function may modify ver and hlim only.
* The mbuf chain containing the packet will be freed.
* The mbuf opt, if present, will not be freed.
*
+ * If ro is non-NULL and has valid ro->ro_rt, route lookup would be
+ * skipped and ro->ro_rt would be used. Otherwise the result of route
+ * lookup is stored in ro->ro_rt.
+ *
* type of "mtu": rt_rmx.rmx_mtu is u_int32_t, ifnet.ifr_mtu is int, and
* nd_ifinfo.linkmtu is u_int32_t. so we use u_int32_t to hold largest one,
* which is rt_rmx.rmx_mtu.
*/
int
-ip6_output(
- struct mbuf *m0,
- struct ip6_pktopts *opt,
- struct route_in6 *ro,
- int flags,
- struct ip6_moptions *im6o,
- struct ifnet **ifpp, /* XXX: just for statistics */
- struct ip6_out_args *ip6oap)
+ip6_output_list(struct mbuf *m0, int packetchain, struct ip6_pktopts *opt,
+ struct route_in6 *ro, int flags, struct ip6_moptions *im6o,
+ struct ifnet **ifpp, struct ip6_out_args *ip6oa)
{
- struct ip6_hdr *ip6, *mhip6;
- struct ifnet *ifp = NULL, *origifp = NULL;
- struct mbuf *m = m0;
- int hlen, tlen, len, off;
- struct route_in6 ip6route;
+ struct ip6_hdr *ip6;
+ u_char *nexthdrp;
+ struct ifnet *ifp = NULL, *origifp = NULL; /* refcnt'd */
+ struct ifnet **ifpp_save = ifpp;
+ struct mbuf *m, *mprev;
+ struct mbuf *sendchain = NULL, *sendchain_last = NULL;
+ struct mbuf *inputchain = NULL;
+ int nxt0;
+ struct route_in6 *ro_pmtu = NULL;
struct rtentry *rt = NULL;
struct sockaddr_in6 *dst, src_sa, dst_sa;
int error = 0;
- struct in6_ifaddr *ia = NULL;
+ struct in6_ifaddr *ia = NULL, *src_ia = NULL;
u_int32_t mtu;
- int alwaysfrag = 0, dontfrag = 0;
+ boolean_t alwaysfrag = FALSE;
u_int32_t optlen = 0, plen = 0, unfragpartlen = 0;
- struct ip6_exthdrs exthdrs;
- struct in6_addr finaldst, src0, dst0;
- u_int32_t zone;
- struct route_in6 *ro_pmtu = NULL;
- int hdrsplit = 0;
- int needipsec = 0;
+ struct ip6_rthdr *rh;
+ struct in6_addr finaldst;
ipfilter_t inject_filter_ref;
- int tso;
- boolean_t select_srcif;
- struct ipf_pktopts *ippo = NULL, ipf_pktopts;
- struct ip6_out_args ip6oa = { IFSCOPE_NONE, { 0 }, 0 };
+ struct ipf_pktopts *ippo = NULL;
struct flowadv *adv = NULL;
- u_int32_t ifmtu;
+ uint32_t pktcnt = 0;
+ uint32_t packets_processed = 0;
+ struct timeval start_tv;
#if DUMMYNET
struct m_tag *tag;
- struct route_in6 saved_route;
- struct route_in6 saved_ro_pmtu;
- struct ip_fw_args args;
+ struct ip6_out_args saved_ip6oa;
struct sockaddr_in6 dst_buf;
-
- bzero(&args, sizeof(struct ip_fw_args));
#endif /* DUMMYNET */
-
- if ((flags & IPV6_OUTARGS) && ip6oap != NULL) {
- ip6oa = *ip6oap;
- adv = &ip6oap->ip6oa_flowadv;
- adv->code = FADV_SUCCESS;
- }
-
#if IPSEC
- int needipsectun = 0;
struct socket *so = NULL;
struct secpolicy *sp = NULL;
struct route_in6 *ipsec_saved_route = NULL;
- struct ipsec_output_state ipsec_state;
+ boolean_t needipsectun = FALSE;
+#endif /* IPSEC */
+#if NECP
+ necp_kernel_policy_result necp_result = 0;
+ necp_kernel_policy_result_parameter necp_result_parameter;
+ necp_kernel_policy_id necp_matched_policy_id = 0;
+#endif /* NECP */
+ struct {
+ struct ipf_pktopts ipf_pktopts;
+ struct ip6_exthdrs exthdrs;
+ struct route_in6 ip6route;
+#if IPSEC
+ struct ipsec_output_state ipsec_state;
+#endif /* IPSEC */
+#if NECP
+ struct route_in6 necp_route;
+#endif /* NECP */
+#if DUMMYNET
+ struct route_in6 saved_route;
+ struct route_in6 saved_ro_pmtu;
+ struct ip_fw_args args;
+#endif /* DUMMYNET */
+ } ip6obz;
+#define ipf_pktopts ip6obz.ipf_pktopts
+#define exthdrs ip6obz.exthdrs
+#define ip6route ip6obz.ip6route
+#define ipsec_state ip6obz.ipsec_state
+#define necp_route ip6obz.necp_route
+#define saved_route ip6obz.saved_route
+#define saved_ro_pmtu ip6obz.saved_ro_pmtu
+#define args ip6obz.args
+ union {
+ struct {
+ boolean_t select_srcif : 1;
+ boolean_t hdrsplit : 1;
+ boolean_t route_selected : 1;
+ boolean_t dontfrag : 1;
+#if IPSEC
+ boolean_t needipsec : 1;
+ boolean_t noipsec : 1;
+#endif /* IPSEC */
+ };
+ uint32_t raw;
+ } ip6obf = { .raw = 0 };
- bzero(&ipsec_state, sizeof(ipsec_state));
+ if (ip6_output_measure)
+ net_perf_start_time(&net_perf, &start_tv);
- /* for AH processing. stupid to have "socket" variable in IP layer... */
- if (ipsec_bypass == 0)
- {
- so = ipsec_getsocket(m);
- (void)ipsec_setsocket(m, NULL);
- }
-#endif /* IPSEC */
+ VERIFY(m0->m_flags & M_PKTHDR);
- bzero(&ipf_pktopts, sizeof(struct ipf_pktopts));
- ippo = &ipf_pktopts;
+ /* zero out {saved_route, saved_ro_pmtu, ip6route, exthdrs, args} */
+ bzero(&ip6obz, sizeof (ip6obz));
- ip6 = mtod(m, struct ip6_hdr *);
- inject_filter_ref = ipf_get_inject_filter(m);
+#if DUMMYNET
+ if (SLIST_EMPTY(&m0->m_pkthdr.tags))
+ goto tags_done;
/* 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;
+ /*
+ * ip6_output_list() cannot handle chains of packets reinjected
+ * by dummynet. The same restriction applies to
+ * ip_output_list().
+ */
+ VERIFY(0 == packetchain);
+
dn_tag = (struct dn_pkt_tag *)(tag+1);
args.fwa_pf_rule = dn_tag->dn_pf_rule;
- bcopy(&dn_tag->dn_dst6, &dst_buf, sizeof(dst_buf));
+ bcopy(&dn_tag->dn_dst6, &dst_buf, sizeof (dst_buf));
dst = &dst_buf;
ifp = dn_tag->dn_ifp;
- if (ifp)
+ if (ifp != NULL)
ifnet_reference(ifp);
flags = dn_tag->dn_flags;
- if (dn_tag->dn_flags & IPV6_OUTARGS)
- ip6oa = dn_tag->dn_ip6oa;
+ if (dn_tag->dn_flags & IPV6_OUTARGS) {
+ saved_ip6oa = dn_tag->dn_ip6oa;
+ ip6oa = &saved_ip6oa;
+ }
saved_route = dn_tag->dn_ro6;
ro = &saved_route;
saved_ro_pmtu = dn_tag->dn_ro6_pmtu;
ro_pmtu = &saved_ro_pmtu;
origifp = dn_tag->dn_origifp;
- if (origifp)
+ if (origifp != NULL)
ifnet_reference(origifp);
mtu = dn_tag->dn_mtu;
- alwaysfrag = dn_tag->dn_alwaysfrag;
+ alwaysfrag = (dn_tag->dn_alwaysfrag != 0);
unfragpartlen = dn_tag->dn_unfragpartlen;
- bcopy(&dn_tag->dn_exthdrs, &exthdrs, sizeof(exthdrs));
+ bcopy(&dn_tag->dn_exthdrs, &exthdrs, sizeof (exthdrs));
m_tag_delete(m0, tag);
}
+
+tags_done:
#endif /* DUMMYNET */
- finaldst = ip6->ip6_dst;
+ m = m0;
+
+#if IPSEC
+ if (ipsec_bypass == 0) {
+ so = ipsec_getsocket(m);
+ if (so != NULL) {
+ (void) ipsec_setsocket(m, NULL);
+ }
+ /* If packet is bound to an interface, check bound policies */
+ if ((flags & IPV6_OUTARGS) &&
+ (ip6oa->ip6oa_flags & IPOAF_BOUND_IF) &&
+ ip6oa->ip6oa_boundif != IFSCOPE_NONE) {
+ /* ip6obf.noipsec is a bitfield, use temp integer */
+ int noipsec = 0;
+
+ if (ipsec6_getpolicybyinterface(m, IPSEC_DIR_OUTBOUND,
+ flags, ip6oa, &noipsec, &sp) != 0)
+ goto bad;
+
+ ip6obf.noipsec = (noipsec != 0);
+ }
+ }
+#endif /* IPSEC */
+
+ ippo = &ipf_pktopts;
if (ip6_doscopedroute && (flags & IPV6_OUTARGS)) {
- if ((select_srcif = (!(flags & (IPV6_FORWARDING |
+ /*
+ * In the forwarding case, only the ifscope value is used,
+ * as source interface selection doesn't take place.
+ */
+ if ((ip6obf.select_srcif = (!(flags & (IPV6_FORWARDING |
IPV6_UNSPECSRC | IPV6_FLAG_NOSRCIFSEL)) &&
- (ip6oa.ip6oa_flags & IP6OAF_SELECT_SRCIF))))
+ (ip6oa->ip6oa_flags & IP6OAF_SELECT_SRCIF))))
ipf_pktopts.ippo_flags |= IPPOF_SELECT_SRCIF;
- if ((ip6oa.ip6oa_flags & IP6OAF_BOUND_IF) &&
- ip6oa.ip6oa_boundif != IFSCOPE_NONE) {
+ if ((ip6oa->ip6oa_flags & IP6OAF_BOUND_IF) &&
+ ip6oa->ip6oa_boundif != IFSCOPE_NONE) {
ipf_pktopts.ippo_flags |= (IPPOF_BOUND_IF |
- (ip6oa.ip6oa_boundif << IPPOF_SHIFT_IFSCOPE));
+ (ip6oa->ip6oa_boundif << IPPOF_SHIFT_IFSCOPE));
}
- if (ip6oa.ip6oa_flags & IP6OAF_BOUND_SRCADDR)
+ if (ip6oa->ip6oa_flags & IP6OAF_BOUND_SRCADDR)
ipf_pktopts.ippo_flags |= IPPOF_BOUND_SRCADDR;
} else {
- select_srcif = FALSE;
- ip6oa.ip6oa_boundif = IFSCOPE_NONE;
- ip6oa.ip6oa_flags &= ~(IP6OAF_SELECT_SRCIF | IP6OAF_BOUND_IF |
- IP6OAF_BOUND_SRCADDR);
+ ip6obf.select_srcif = FALSE;
+ if (flags & IPV6_OUTARGS) {
+ ip6oa->ip6oa_boundif = IFSCOPE_NONE;
+ ip6oa->ip6oa_flags &= ~(IP6OAF_SELECT_SRCIF |
+ IP6OAF_BOUND_IF | IP6OAF_BOUND_SRCADDR);
+ }
}
- if ((flags & IPV6_OUTARGS) && (ip6oa.ip6oa_flags & IP6OAF_NO_CELLULAR))
- ipf_pktopts.ippo_flags |= IPPOF_NO_IFT_CELLULAR;
+ if (flags & IPV6_OUTARGS) {
+ if (ip6oa->ip6oa_flags & IP6OAF_NO_CELLULAR)
+ ipf_pktopts.ippo_flags |= IPPOF_NO_IFT_CELLULAR;
+ if (ip6oa->ip6oa_flags & IP6OAF_NO_EXPENSIVE)
+ ipf_pktopts.ippo_flags |= IPPOF_NO_IFF_EXPENSIVE;
+ adv = &ip6oa->ip6oa_flowadv;
+ adv->code = FADV_SUCCESS;
+ ip6oa->ip6oa_retflags = 0;
+ }
+
+ /*
+ * Clear out ifpp to be filled in after determining route. ifpp_save is
+ * used to keep old value to release reference properly and dtrace
+ * ipsec tunnel traffic properly.
+ */
+ if (ifpp != NULL && *ifpp != NULL)
+ *ifpp = NULL;
#if DUMMYNET
if (args.fwa_pf_rule) {
ip6 = mtod(m, struct ip6_hdr *);
-
+ VERIFY(ro != NULL); /* ro == saved_route */
goto check_with_pf;
}
#endif /* DUMMYNET */
-#define MAKE_EXTHDR(hp, mp) \
- do { \
- if (hp) { \
+#if NECP
+ /*
+ * Since all packets are assumed to come from same socket, necp lookup
+ * only needs to happen once per function entry.
+ */
+ necp_matched_policy_id = necp_ip6_output_find_policy_match(m, flags,
+ (flags & IPV6_OUTARGS) ? ip6oa : NULL, &necp_result,
+ &necp_result_parameter);
+#endif /* NECP */
+
+ /*
+ * If a chain was passed in, prepare for ther first iteration. For all
+ * other iterations, this work will be done at evaluateloop: label.
+ */
+ if (packetchain) {
+ /*
+ * Remove m from the chain during processing to avoid
+ * accidental frees on entire list.
+ */
+ inputchain = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+ }
+
+loopit:
+ packets_processed++;
+ m->m_pkthdr.pkt_flags &= ~(PKTF_LOOP|PKTF_IFAINFO);
+ ip6 = mtod(m, struct ip6_hdr *);
+ nxt0 = ip6->ip6_nxt;
+ finaldst = ip6->ip6_dst;
+ ip6obf.hdrsplit = FALSE;
+ ro_pmtu = NULL;
+
+ if (!SLIST_EMPTY(&m->m_pkthdr.tags))
+ inject_filter_ref = ipf_get_inject_filter(m);
+ else
+ inject_filter_ref = NULL;
+
+#define MAKE_EXTHDR(hp, mp) do { \
+ if (hp != NULL) { \
struct ip6_ext *eh = (struct ip6_ext *)(hp); \
- error = ip6_copyexthdr((mp), (caddr_t)(hp), \
- ((eh)->ip6e_len + 1) << 3); \
+ error = ip6_copyexthdr((mp), (caddr_t)(hp), \
+ ((eh)->ip6e_len + 1) << 3); \
if (error) \
goto freehdrs; \
} \
- } while (0)
-
- bzero(&exthdrs, sizeof(exthdrs));
+} while (0)
- if (opt) {
+ if (opt != NULL) {
/* Hop-by-Hop options header */
MAKE_EXTHDR(opt->ip6po_hbh, &exthdrs.ip6e_hbh);
/* Destination options header(1st part) */
MAKE_EXTHDR(opt->ip6po_dest2, &exthdrs.ip6e_dest2);
}
+#undef MAKE_EXTHDR
+
+#if NECP
+ if (necp_matched_policy_id) {
+ necp_mark_packet_from_ip(m, necp_matched_policy_id);
+
+ switch (necp_result) {
+ case NECP_KERNEL_POLICY_RESULT_PASS:
+ goto skip_ipsec;
+ case NECP_KERNEL_POLICY_RESULT_DROP:
+ case NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT:
+ /*
+ * Flow divert packets should be blocked at the IP
+ * layer.
+ */
+ error = EHOSTUNREACH;
+ goto freehdrs;
+ case NECP_KERNEL_POLICY_RESULT_IP_TUNNEL: {
+ /*
+ * Verify that the packet is being routed to the tunnel
+ */
+ struct ifnet *policy_ifp =
+ necp_get_ifnet_from_result_parameter(
+ &necp_result_parameter);
+
+ if (policy_ifp == ifp) {
+ goto skip_ipsec;
+ } else {
+ if (necp_packet_can_rebind_to_ifnet(m,
+ policy_ifp, (struct route *)&necp_route,
+ AF_INET6)) {
+ /*
+ * Set scoped index to the tunnel
+ * interface, since it is compatible
+ * with the packet. This will only work
+ * for callers who pass IPV6_OUTARGS,
+ * but that covers all of the clients
+ * we care about today.
+ */
+ if (flags & IPV6_OUTARGS) {
+ ip6oa->ip6oa_boundif =
+ policy_ifp->if_index;
+ ip6oa->ip6oa_flags |=
+ IP6OAF_BOUND_IF;
+ }
+ if (opt != NULL
+ && opt->ip6po_pktinfo != NULL) {
+ opt->ip6po_pktinfo->
+ ipi6_ifindex =
+ policy_ifp->if_index;
+ }
+ ro = &necp_route;
+ goto skip_ipsec;
+ } else {
+ error = ENETUNREACH;
+ goto freehdrs;
+ }
+ }
+ break;
+ }
+ default:
+ break;
+ }
+ }
+#endif /* NECP */
+
#if IPSEC
- if (ipsec_bypass != 0)
+ if (ipsec_bypass != 0 || ip6obf.noipsec)
goto skip_ipsec;
- /* get a security policy for this packet */
- if (so == NULL)
- sp = ipsec6_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND, 0, &error);
- else
- sp = ipsec6_getpolicybysock(m, IPSEC_DIR_OUTBOUND, so, &error);
-
if (sp == NULL) {
- IPSEC_STAT_INCREMENT(ipsec6stat.out_inval);
- goto freehdrs;
+ /* get a security policy for this packet */
+ if (so != NULL) {
+ sp = ipsec6_getpolicybysock(m, IPSEC_DIR_OUTBOUND,
+ so, &error);
+ } else {
+ sp = ipsec6_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND,
+ 0, &error);
+ }
+ if (sp == NULL) {
+ IPSEC_STAT_INCREMENT(ipsec6stat.out_inval);
+ goto freehdrs;
+ }
}
error = 0;
case IPSEC_POLICY_BYPASS:
case IPSEC_POLICY_NONE:
/* no need to do IPsec. */
- needipsec = 0;
+ ip6obf.needipsec = FALSE;
break;
case IPSEC_POLICY_IPSEC:
error = key_spdacquire(sp);
goto freehdrs;
}
- needipsec = 1;
+ if (sp->ipsec_if) {
+ goto skip_ipsec;
+ } else {
+ ip6obf.needipsec = TRUE;
+ }
break;
case IPSEC_POLICY_ENTRUST:
default:
- printf("ip6_output: Invalid policy found. %d\n", sp->policy);
+ printf("%s: Invalid policy found: %d\n", __func__, sp->policy);
+ break;
}
- skip_ipsec:
+skip_ipsec:
#endif /* IPSEC */
/*
* Keep the length of the unfragmentable part for fragmentation.
*/
optlen = 0;
- if (exthdrs.ip6e_hbh)
+ if (exthdrs.ip6e_hbh != NULL)
optlen += exthdrs.ip6e_hbh->m_len;
- if (exthdrs.ip6e_dest1)
+ if (exthdrs.ip6e_dest1 != NULL)
optlen += exthdrs.ip6e_dest1->m_len;
- if (exthdrs.ip6e_rthdr)
+ if (exthdrs.ip6e_rthdr != NULL)
optlen += exthdrs.ip6e_rthdr->m_len;
- unfragpartlen = optlen + sizeof(struct ip6_hdr);
+ unfragpartlen = optlen + sizeof (struct ip6_hdr);
/* NOTE: we don't add AH/ESP length here. do that later. */
- if (exthdrs.ip6e_dest2)
+ if (exthdrs.ip6e_dest2 != NULL)
optlen += exthdrs.ip6e_dest2->m_len;
-
- if (needipsec &&
- (m->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA) != 0) {
- in6_delayed_cksum(m, sizeof(struct ip6_hdr) + optlen);
- m->m_pkthdr.csum_flags &= ~CSUM_DELAY_IPV6_DATA;
- }
-
/*
* If we need IPsec, or there is at least one extension header,
* separate IP6 header from the payload.
*/
- if ((needipsec || optlen) && !hdrsplit) {
+ if ((
+#if IPSEC
+ ip6obf.needipsec ||
+#endif /* IPSEC */
+ optlen) && !ip6obf.hdrsplit) {
if ((error = ip6_splithdr(m, &exthdrs)) != 0) {
m = NULL;
goto freehdrs;
}
m = exthdrs.ip6e_ip6;
- hdrsplit++;
+ ip6obf.hdrsplit = TRUE;
}
/* adjust pointer */
/* adjust mbuf packet header length */
m->m_pkthdr.len += optlen;
- plen = m->m_pkthdr.len - sizeof(*ip6);
+ plen = m->m_pkthdr.len - sizeof (*ip6);
/* If this is a jumbo payload, insert a jumbo payload option. */
if (plen > IPV6_MAXPACKET) {
- if (!hdrsplit) {
+ if (!ip6obf.hdrsplit) {
if ((error = ip6_splithdr(m, &exthdrs)) != 0) {
m = NULL;
goto freehdrs;
}
m = exthdrs.ip6e_ip6;
- hdrsplit++;
+ ip6obf.hdrsplit = TRUE;
}
/* adjust pointer */
ip6 = mtod(m, struct ip6_hdr *);
if ((error = ip6_insert_jumboopt(&exthdrs, plen)) != 0)
goto freehdrs;
ip6->ip6_plen = 0;
- } else
+ } else {
ip6->ip6_plen = htons(plen);
-
+ }
/*
* Concatenate headers and fill in next header fields.
* Here we have, on "m"
* during the header composing process, "m" points to IPv6 header.
* "mprev" points to an extension header prior to esp.
*/
- {
- u_char *nexthdrp = &ip6->ip6_nxt;
- struct mbuf *mprev = m;
+ nexthdrp = &ip6->ip6_nxt;
+ mprev = m;
- /*
- * we treat dest2 specially. this makes IPsec processing
- * much easier. the goal here is to make mprev point the
- * mbuf prior to dest2.
- *
- * result: IPv6 dest2 payload
- * m and mprev will point to IPv6 header.
- */
- if (exthdrs.ip6e_dest2) {
- if (!hdrsplit)
- panic("assumption failed: hdr not split");
- exthdrs.ip6e_dest2->m_next = m->m_next;
- m->m_next = exthdrs.ip6e_dest2;
- *mtod(exthdrs.ip6e_dest2, u_char *) = ip6->ip6_nxt;
- ip6->ip6_nxt = IPPROTO_DSTOPTS;
- }
-
-#define MAKE_CHAIN(m, mp, p, i)\
- do {\
- if (m) {\
- if (!hdrsplit) \
- panic("assumption failed: hdr not split"); \
- *mtod((m), u_char *) = *(p);\
- *(p) = (i);\
- p = mtod((m), u_char *);\
- (m)->m_next = (mp)->m_next;\
- (mp)->m_next = (m);\
- (mp) = (m);\
- }\
- } while (0)
- /*
- * result: IPv6 hbh dest1 rthdr dest2 payload
- * m will point to IPv6 header. mprev will point to the
- * extension header prior to dest2 (rthdr in the above case).
- */
- MAKE_CHAIN(exthdrs.ip6e_hbh, mprev,
- nexthdrp, IPPROTO_HOPOPTS);
- MAKE_CHAIN(exthdrs.ip6e_dest1, mprev,
- nexthdrp, IPPROTO_DSTOPTS);
- MAKE_CHAIN(exthdrs.ip6e_rthdr, mprev,
- nexthdrp, IPPROTO_ROUTING);
-
- if (!TAILQ_EMPTY(&ipv6_filters)) {
- struct ipfilter *filter;
- int seen = (inject_filter_ref == 0);
- int fixscope = 0;
-
- if (im6o != NULL && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
- ippo->ippo_flags |= IPPOF_MCAST_OPTS;
- IM6O_LOCK(im6o);
- ippo->ippo_mcast_ifnet = im6o->im6o_multicast_ifp;
- ippo->ippo_mcast_ttl = im6o->im6o_multicast_hlim;
- ippo->ippo_mcast_loop = im6o->im6o_multicast_loop;
- IM6O_UNLOCK(im6o);
- }
+ /*
+ * we treat dest2 specially. this makes IPsec processing
+ * much easier. the goal here is to make mprev point the
+ * mbuf prior to dest2.
+ *
+ * result: IPv6 dest2 payload
+ * m and mprev will point to IPv6 header.
+ */
+ if (exthdrs.ip6e_dest2 != NULL) {
+ if (!ip6obf.hdrsplit) {
+ panic("assumption failed: hdr not split");
+ /* NOTREACHED */
+ }
+ exthdrs.ip6e_dest2->m_next = m->m_next;
+ m->m_next = exthdrs.ip6e_dest2;
+ *mtod(exthdrs.ip6e_dest2, u_char *) = ip6->ip6_nxt;
+ ip6->ip6_nxt = IPPROTO_DSTOPTS;
+ }
- /* Hack: embed the scope_id in the destination */
- if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst) &&
- (ip6->ip6_dst.s6_addr16[1] == 0) && (ro != NULL)) {
- fixscope = 1;
- ip6->ip6_dst.s6_addr16[1] = htons(ro->ro_dst.sin6_scope_id);
- }
- {
- ipf_ref();
- TAILQ_FOREACH(filter, &ipv6_filters, ipf_link) {
- /*
- * No need to proccess packet twice if we've
- * already seen it
- */
- 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;
- }
- }
+#define MAKE_CHAIN(m, mp, p, i) do { \
+ if (m != NULL) { \
+ if (!ip6obf.hdrsplit) { \
+ panic("assumption failed: hdr not split"); \
+ /* NOTREACHED */ \
+ } \
+ *mtod((m), u_char *) = *(p); \
+ *(p) = (i); \
+ p = mtod((m), u_char *); \
+ (m)->m_next = (mp)->m_next; \
+ (mp)->m_next = (m); \
+ (mp) = (m); \
+ } \
+} while (0)
+ /*
+ * result: IPv6 hbh dest1 rthdr dest2 payload
+ * m will point to IPv6 header. mprev will point to the
+ * extension header prior to dest2 (rthdr in the above case).
+ */
+ MAKE_CHAIN(exthdrs.ip6e_hbh, mprev, nexthdrp, IPPROTO_HOPOPTS);
+ MAKE_CHAIN(exthdrs.ip6e_dest1, mprev, nexthdrp, IPPROTO_DSTOPTS);
+ MAKE_CHAIN(exthdrs.ip6e_rthdr, mprev, nexthdrp, IPPROTO_ROUTING);
+
+ /* It is no longer safe to free the pointers in exthdrs. */
+ exthdrs.merged = TRUE;
+
+#undef MAKE_CHAIN
+
+#if IPSEC
+ if (ip6obf.needipsec && (m->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA))
+ in6_delayed_cksum_offset(m, 0, optlen, nxt0);
+#endif /* IPSEC */
+
+ if (!TAILQ_EMPTY(&ipv6_filters)) {
+ struct ipfilter *filter;
+ int seen = (inject_filter_ref == NULL);
+ int fixscope = 0;
+
+ if (im6o != NULL && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ ippo->ippo_flags |= IPPOF_MCAST_OPTS;
+ IM6O_LOCK(im6o);
+ ippo->ippo_mcast_ifnet = im6o->im6o_multicast_ifp;
+ ippo->ippo_mcast_ttl = im6o->im6o_multicast_hlim;
+ ippo->ippo_mcast_loop = im6o->im6o_multicast_loop;
+ IM6O_UNLOCK(im6o);
+ }
+
+ /* Hack: embed the scope_id in the destination */
+ if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst) &&
+ (ip6->ip6_dst.s6_addr16[1] == 0) && (ro != NULL)) {
+ fixscope = 1;
+ ip6->ip6_dst.s6_addr16[1] =
+ htons(ro->ro_dst.sin6_scope_id);
+ }
+
+ ipf_ref();
+ TAILQ_FOREACH(filter, &ipv6_filters, ipf_link) {
+ /*
+ * Don't process packet twice if we've already seen it.
+ */
+ if (seen == 0) {
+ if ((struct ipfilter *)inject_filter_ref ==
+ filter)
+ seen = 1;
+ } else if (filter->ipf_filter.ipf_output != NULL) {
+ errno_t result;
+
+ result = filter->ipf_filter.ipf_output(
+ filter->ipf_filter.cookie,
+ (mbuf_t *)&m, ippo);
+ if (result == EJUSTRETURN) {
+ ipf_unref();
+ if (m != NULL)
+ m_freem(m);
+ m = NULL;
+ goto evaluateloop;
+ }
+ if (result != 0) {
+ ipf_unref();
+ goto bad;
}
- ipf_unref();
}
- ip6 = mtod(m, struct ip6_hdr *);
- /* Hack: cleanup embedded scope_id if we put it there */
- if (fixscope)
- ip6->ip6_dst.s6_addr16[1] = 0;
}
+ ipf_unref();
+
+ ip6 = mtod(m, struct ip6_hdr *);
+ /* Hack: cleanup embedded scope_id if we put it there */
+ if (fixscope)
+ ip6->ip6_dst.s6_addr16[1] = 0;
+ }
#if IPSEC
- if (!needipsec)
- goto skip_ipsec2;
+ if (ip6obf.needipsec) {
+ int segleft_org;
/*
* pointers after IPsec headers are not valid any more.
*/
exthdrs.ip6e_dest2 = NULL;
- {
- struct ip6_rthdr *rh = NULL;
- int segleft_org = 0;
-
- if (exthdrs.ip6e_rthdr) {
+ if (exthdrs.ip6e_rthdr != NULL) {
rh = mtod(exthdrs.ip6e_rthdr, struct ip6_rthdr *);
segleft_org = rh->ip6r_segleft;
rh->ip6r_segleft = 0;
+ } else {
+ rh = NULL;
+ segleft_org = 0;
}
ipsec_state.m = m;
- error = ipsec6_output_trans(&ipsec_state, nexthdrp, mprev, sp, flags,
- &needipsectun);
+ error = ipsec6_output_trans(&ipsec_state, nexthdrp, mprev,
+ sp, flags, &needipsectun);
m = ipsec_state.m;
if (error) {
/* mbuf is already reclaimed in ipsec6_output_trans. */
case ENOMEM:
break;
default:
- printf("ip6_output (ipsec): error code %d\n", error);
- /* fall through */
+ printf("ip6_output (ipsec): error code %d\n",
+ error);
+ /* FALLTHRU */
case ENOENT:
/* don't show these error codes to the user */
error = 0;
}
goto bad;
}
- if (exthdrs.ip6e_rthdr) {
+ if (exthdrs.ip6e_rthdr != NULL) {
/* ah6_output doesn't modify mbuf chain */
rh->ip6r_segleft = segleft_org;
}
- }
}
-skip_ipsec2:
-#endif
+#endif /* IPSEC */
/*
* If there is a routing header, replace the destination address field
* with the first hop of the routing header.
*/
- if (exthdrs.ip6e_rthdr) {
- struct ip6_rthdr *rh =
- (struct ip6_rthdr *)(mtod(exthdrs.ip6e_rthdr,
- struct ip6_rthdr *));
+ if (exthdrs.ip6e_rthdr != NULL) {
struct ip6_rthdr0 *rh0;
struct in6_addr *addr;
struct sockaddr_in6 sa;
+ rh = (struct ip6_rthdr *)
+ (mtod(exthdrs.ip6e_rthdr, struct ip6_rthdr *));
switch (rh->ip6r_type) {
case IPV6_RTHDR_TYPE_0:
- rh0 = (struct ip6_rthdr0 *)rh;
- addr = (struct in6_addr *)(void *)(rh0 + 1);
-
- /*
- * construct a sockaddr_in6 form of
- * the first hop.
- *
- * XXX: we may not have enough
- * information about its scope zone;
- * there is no standard API to pass
- * the information from the
- * application.
- */
- bzero(&sa, sizeof(sa));
- sa.sin6_family = AF_INET6;
- sa.sin6_len = sizeof(sa);
- sa.sin6_addr = addr[0];
- if ((error = sa6_embedscope(&sa,
- ip6_use_defzone)) != 0) {
- goto bad;
- }
- ip6->ip6_dst = sa.sin6_addr;
- bcopy(&addr[1], &addr[0], sizeof(struct in6_addr)
- * (rh0->ip6r0_segleft - 1));
- addr[rh0->ip6r0_segleft - 1] = finaldst;
- /* XXX */
- in6_clearscope(addr + rh0->ip6r0_segleft - 1);
- break;
+ rh0 = (struct ip6_rthdr0 *)rh;
+ addr = (struct in6_addr *)(void *)(rh0 + 1);
+
+ /*
+ * construct a sockaddr_in6 form of
+ * the first hop.
+ *
+ * XXX: we may not have enough
+ * information about its scope zone;
+ * there is no standard API to pass
+ * the information from the
+ * application.
+ */
+ bzero(&sa, sizeof (sa));
+ sa.sin6_family = AF_INET6;
+ sa.sin6_len = sizeof (sa);
+ sa.sin6_addr = addr[0];
+ if ((error = sa6_embedscope(&sa,
+ ip6_use_defzone)) != 0) {
+ goto bad;
+ }
+ ip6->ip6_dst = sa.sin6_addr;
+ bcopy(&addr[1], &addr[0], sizeof (struct in6_addr) *
+ (rh0->ip6r0_segleft - 1));
+ addr[rh0->ip6r0_segleft - 1] = finaldst;
+ /* XXX */
+ in6_clearscope(addr + rh0->ip6r0_segleft - 1);
+ break;
default: /* is it possible? */
- error = EINVAL;
- goto bad;
+ error = EINVAL;
+ goto bad;
}
}
/* Source address validation */
if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src) &&
- (flags & IPV6_UNSPECSRC) == 0) {
+ !(flags & IPV6_UNSPECSRC)) {
error = EOPNOTSUPP;
ip6stat.ip6s_badscope++;
goto bad;
/*
* Route packet.
*/
- if (ro == 0) {
+ if (ro == NULL) {
ro = &ip6route;
- bzero((caddr_t)ro, sizeof(*ro));
+ bzero((caddr_t)ro, sizeof (*ro));
}
ro_pmtu = ro;
- if (opt && opt->ip6po_rthdr)
+ if (opt != NULL && opt->ip6po_rthdr)
ro = &opt->ip6po_route;
- dst = (struct sockaddr_in6 *)&ro->ro_dst;
+ dst = SIN6(&ro->ro_dst);
- if (ro && ro->ro_rt)
+ if (ro->ro_rt != NULL)
RT_LOCK_ASSERT_NOTHELD(ro->ro_rt);
/*
* if specified, try to fill in the traffic class field.
* do not override if a non-zero value is already set.
* we check the diffserv field and the ecn field separately.
*/
- if (opt && opt->ip6po_tclass >= 0) {
+ if (opt != NULL && opt->ip6po_tclass >= 0) {
int mask = 0;
if ((ip6->ip6_flow & htonl(0xfc << 20)) == 0)
mask |= 0xfc;
if ((ip6->ip6_flow & htonl(0x03 << 20)) == 0)
mask |= 0x03;
- if (mask != 0)
- ip6->ip6_flow |= htonl((opt->ip6po_tclass & mask) << 20);
+ if (mask != 0) {
+ ip6->ip6_flow |=
+ htonl((opt->ip6po_tclass & mask) << 20);
+ }
}
/* fill in or override the hop limit field, if necessary. */
- if (opt && opt->ip6po_hlim != -1)
+ if (opt && opt->ip6po_hlim != -1) {
ip6->ip6_hlim = opt->ip6po_hlim & 0xff;
- else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
if (im6o != NULL) {
IM6O_LOCK(im6o);
ip6->ip6_hlim = im6o->im6o_multicast_hlim;
* below (since it uses this route as a hint) or during the
* next transmit.
*/
- if (ro->ro_rt != NULL && (!(ro->ro_rt->rt_flags & RTF_UP) ||
- dst->sin6_family != AF_INET6 ||
- !IN6_ARE_ADDR_EQUAL(&dst->sin6_addr, &ip6->ip6_dst) ||
- ro->ro_rt->generation_id != route_generation)) {
- rtfree(ro->ro_rt);
- ro->ro_rt = NULL;
- }
+ if (ROUTE_UNUSABLE(ro) || dst->sin6_family != AF_INET6 ||
+ !IN6_ARE_ADDR_EQUAL(&dst->sin6_addr, &ip6->ip6_dst))
+ ROUTE_RELEASE(ro);
+
if (ro->ro_rt == NULL) {
- bzero(dst, sizeof(*dst));
+ bzero(dst, sizeof (*dst));
dst->sin6_family = AF_INET6;
- dst->sin6_len = sizeof(struct sockaddr_in6);
+ dst->sin6_len = sizeof (struct sockaddr_in6);
dst->sin6_addr = ip6->ip6_dst;
}
#if IPSEC
- if (needipsec && needipsectun) {
+ if (ip6obf.needipsec && needipsectun) {
#if CONFIG_DTRACE
- struct ifnet *trace_ifp = (ifpp != NULL) ? (*ifpp) : NULL;
-#endif
+ struct ifnet *trace_ifp = (ifpp_save != NULL) ? (*ifpp_save) : NULL;
+#endif /* CONFIG_DTRACE */
/*
* All the extension headers will become inaccessible
* (since they can be encrypted).
*
* IPv6 [ESP|AH] IPv6 [extension headers] payload
*/
- bzero(&exthdrs, sizeof(exthdrs));
+ bzero(&exthdrs, sizeof (exthdrs));
exthdrs.ip6e_ip6 = m;
ipsec_state.m = m;
- route_copyout(&ipsec_state.ro, (struct route *)ro, sizeof(ipsec_state.ro));
- ipsec_state.dst = (struct sockaddr *)dst;
+ route_copyout(&ipsec_state.ro, (struct route *)ro,
+ sizeof (ipsec_state.ro));
+ ipsec_state.dst = SA(dst);
- /* Added a trace here so that we can see packets inside a tunnel */
+ /* So that we can see packets inside the tunnel */
DTRACE_IP6(send, struct mbuf *, m, struct inpcb *, NULL,
- struct ip6_hdr *, ip6, struct ifnet *, trace_ifp,
- struct ip *, NULL, struct ip6_hdr *, ip6);
+ struct ip6_hdr *, ip6, struct ifnet *, trace_ifp,
+ struct ip *, NULL, struct ip6_hdr *, ip6);
error = ipsec6_output_tunnel(&ipsec_state, sp, flags);
- if (ipsec_state.tunneled == 4) /* tunneled in IPv4 - packet is gone */
- goto done;
+ /* tunneled in IPv4? packet is gone */
+ if (ipsec_state.tunneled == 4) {
+ m = NULL;
+ goto evaluateloop;
+ }
m = ipsec_state.m;
ipsec_saved_route = ro;
ro = (struct route_in6 *)&ipsec_state.ro;
- dst = (struct sockaddr_in6 *)(void *)ipsec_state.dst;
+ dst = SIN6(ipsec_state.dst);
if (error) {
/* mbuf is already reclaimed in ipsec6_output_tunnel. */
- m0 = m = NULL;
m = NULL;
switch (error) {
case EHOSTUNREACH:
case ENOMEM:
break;
default:
- printf("ip6_output (ipsec): error code %d\n", error);
- /* fall through */
+ printf("ip6_output (ipsec): error code %d\n",
+ error);
+ /* FALLTHRU */
case ENOENT:
/* don't show these error codes to the user */
error = 0;
goto bad;
}
/*
- * The packet has been encapsulated so the ifscope is no longer valid
- * since it does not apply to the outer address: ignore the ifscope.
+ * The packet has been encapsulated so the ifscope
+ * is no longer valid since it does not apply to the
+ * outer address: ignore the ifscope.
*/
- ip6oa.ip6oa_boundif = IFSCOPE_NONE;
- ip6oa.ip6oa_flags &= ~IP6OAF_BOUND_IF;
+ if (flags & IPV6_OUTARGS) {
+ ip6oa->ip6oa_boundif = IFSCOPE_NONE;
+ ip6oa->ip6oa_flags &= ~IP6OAF_BOUND_IF;
+ }
if (opt != NULL && opt->ip6po_pktinfo != NULL) {
if (opt->ip6po_pktinfo->ipi6_ifindex != IFSCOPE_NONE)
opt->ip6po_pktinfo->ipi6_ifindex = IFSCOPE_NONE;
}
#endif /* IPSEC */
- /* for safety */
+ /*
+ * ifp should only be filled in for dummy net packets which will jump
+ * to check_with_pf label.
+ */
if (ifp != NULL) {
- ifnet_release(ifp);
- ifp = NULL;
+ VERIFY(ip6obf.route_selected);
}
/* adjust pointer */
ip6 = mtod(m, struct ip6_hdr *);
- if (select_srcif) {
- bzero(&src_sa, sizeof(src_sa));
+ if (ip6obf.select_srcif) {
+ bzero(&src_sa, sizeof (src_sa));
src_sa.sin6_family = AF_INET6;
- src_sa.sin6_len = sizeof(src_sa);
+ src_sa.sin6_len = sizeof (src_sa);
src_sa.sin6_addr = ip6->ip6_src;
}
- bzero(&dst_sa, sizeof(dst_sa));
+ bzero(&dst_sa, sizeof (dst_sa));
dst_sa.sin6_family = AF_INET6;
- dst_sa.sin6_len = sizeof(dst_sa);
+ dst_sa.sin6_len = sizeof (dst_sa);
dst_sa.sin6_addr = ip6->ip6_dst;
/*
+ * Only call in6_selectroute() on first iteration to avoid taking
+ * multiple references on ifp and rt.
+ *
* in6_selectroute() might return an ifp with its reference held
* even in the error case, so make sure to release its reference.
+ * ip6oa may be NULL if IPV6_OUTARGS isn't set.
*/
- if ((error = in6_selectroute(select_srcif ? &src_sa : NULL,
- &dst_sa, opt, im6o, ro, &ifp, &rt, 0, &ip6oa)) != 0) {
- switch (error) {
- case EHOSTUNREACH:
- ip6stat.ip6s_noroute++;
- break;
- case EADDRNOTAVAIL:
- default:
- break; /* XXX statistics? */
+ if (!ip6obf.route_selected) {
+ error = in6_selectroute( ip6obf.select_srcif ? &src_sa : NULL,
+ &dst_sa, opt, im6o, &src_ia, ro, &ifp, &rt, 0, ip6oa);
+
+ if (error != 0) {
+ switch (error) {
+ case EHOSTUNREACH:
+ ip6stat.ip6s_noroute++;
+ break;
+ case EADDRNOTAVAIL:
+ default:
+ break; /* XXX statistics? */
+ }
+ if (ifp != NULL)
+ in6_ifstat_inc(ifp, ifs6_out_discard);
+ /* ifp (if non-NULL) will be released at the end */
+ goto bad;
}
- if (ifp != NULL)
- in6_ifstat_inc(ifp, ifs6_out_discard);
- /* ifp (if non-NULL) will be released at the end */
- goto bad;
+ ip6obf.route_selected = TRUE;
}
if (rt == NULL) {
/*
*dst = dst_sa; /* XXX */
}
+#if NECP
+ /* Catch-all to check if the interface is allowed */
+ if (!necp_packet_is_allowed_over_interface(m, ifp)) {
+ error = EHOSTUNREACH;
+ goto bad;
+ }
+#endif /* NECP */
+
/*
* then rt (for unicast) and ifp must be non-NULL valid values.
*/
- if ((flags & IPV6_FORWARDING) == 0) {
- /* XXX: the FORWARDING flag can be set for mrouting. */
- in6_ifstat_inc(ifp, ifs6_out_request);
+ if (!(flags & IPV6_FORWARDING)) {
+ in6_ifstat_inc_na(ifp, ifs6_out_request);
}
if (rt != NULL) {
RT_LOCK(rt);
- ia = (struct in6_ifaddr *)(rt->rt_ifa);
- if (ia != NULL)
- IFA_ADDREF(&ia->ia_ifa);
+ if (ia == NULL) {
+ ia = (struct in6_ifaddr *)(rt->rt_ifa);
+ if (ia != NULL)
+ IFA_ADDREF(&ia->ia_ifa);
+ }
rt->rt_use++;
RT_UNLOCK(rt);
}
/*
* The outgoing interface must be in the zone of source and
- * destination addresses. We should use ia_ifp to support the
- * case of sending packets to an address of our own.
+ * destination addresses (except local/loopback). We should
+ * use ia_ifp to support the case of sending packets to an
+ * address of our own.
*/
if (ia != NULL && ia->ia_ifp) {
ifnet_reference(ia->ia_ifp); /* for origifp */
ifnet_release(origifp);
origifp = ifp;
}
- src0 = ip6->ip6_src;
- if (in6_setscope(&src0, origifp, &zone))
- goto badscope;
- bzero(&src_sa, sizeof(src_sa));
- src_sa.sin6_family = AF_INET6;
- src_sa.sin6_len = sizeof(src_sa);
- src_sa.sin6_addr = ip6->ip6_src;
- if (sa6_recoverscope(&src_sa, TRUE) || zone != src_sa.sin6_scope_id)
- goto badscope;
-
- dst0 = ip6->ip6_dst;
- if (in6_setscope(&dst0, origifp, &zone))
- goto badscope;
- /* re-initialize to be sure */
- bzero(&dst_sa, sizeof(dst_sa));
- dst_sa.sin6_family = AF_INET6;
- dst_sa.sin6_len = sizeof(dst_sa);
- dst_sa.sin6_addr = ip6->ip6_dst;
- if (sa6_recoverscope(&dst_sa, TRUE) || zone != dst_sa.sin6_scope_id) {
- goto badscope;
- }
- /* scope check is done. */
- goto routefound;
+ /* skip scope enforcements for local/loopback route */
+ if (rt == NULL || !(rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
+ struct in6_addr src0, dst0;
+ u_int32_t zone;
- badscope:
- ip6stat.ip6s_badscope++;
- in6_ifstat_inc(origifp, ifs6_out_discard);
- if (error == 0)
- error = EHOSTUNREACH; /* XXX */
- goto bad;
+ src0 = ip6->ip6_src;
+ if (in6_setscope(&src0, origifp, &zone))
+ goto badscope;
+ bzero(&src_sa, sizeof (src_sa));
+ src_sa.sin6_family = AF_INET6;
+ src_sa.sin6_len = sizeof (src_sa);
+ src_sa.sin6_addr = ip6->ip6_src;
+ if ((sa6_recoverscope(&src_sa, TRUE) ||
+ zone != src_sa.sin6_scope_id))
+ goto badscope;
+
+ dst0 = ip6->ip6_dst;
+ if ((in6_setscope(&dst0, origifp, &zone)))
+ goto badscope;
+ /* re-initialize to be sure */
+ bzero(&dst_sa, sizeof (dst_sa));
+ dst_sa.sin6_family = AF_INET6;
+ dst_sa.sin6_len = sizeof (dst_sa);
+ dst_sa.sin6_addr = ip6->ip6_dst;
+ if ((sa6_recoverscope(&dst_sa, TRUE) ||
+ zone != dst_sa.sin6_scope_id))
+ goto badscope;
+
+ /* scope check is done. */
+ goto routefound;
+
+badscope:
+ ip6stat.ip6s_badscope++;
+ in6_ifstat_inc(origifp, ifs6_out_discard);
+ if (error == 0)
+ error = EHOSTUNREACH; /* XXX */
+ goto bad;
+ }
- routefound:
- if (rt && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
- if (opt && opt->ip6po_nextroute.ro_rt) {
+routefound:
+ if (rt != NULL && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ if (opt != NULL && opt->ip6po_nextroute.ro_rt) {
/*
* The nexthop is explicitly specified by the
* application. We assume the next hop is an IPv6
* address.
*/
- dst = (struct sockaddr_in6 *)(void *)opt->ip6po_nexthop;
+ dst = SIN6(opt->ip6po_nexthop);
+ } else if ((rt->rt_flags & RTF_GATEWAY)) {
+ dst = SIN6(rt->rt_gateway);
+ }
+ /*
+ * For packets destined to local/loopback, record the
+ * source the source interface (which owns the source
+ * address), as well as the output interface. This is
+ * needed to reconstruct the embedded zone for the
+ * link-local address case in ip6_input().
+ */
+ if (ia != NULL && (ifp->if_flags & IFF_LOOPBACK)) {
+ uint32_t srcidx;
+
+ if (src_ia != NULL)
+ srcidx = src_ia->ia_ifp->if_index;
+ else if (ro->ro_srcia != NULL)
+ srcidx = ro->ro_srcia->ifa_ifp->if_index;
+ else
+ srcidx = 0;
+
+ ip6_setsrcifaddr_info(m, srcidx, NULL);
+ ip6_setdstifaddr_info(m, 0, ia);
}
- else if ((rt->rt_flags & RTF_GATEWAY))
- dst = (struct sockaddr_in6 *)(void *)rt->rt_gateway;
}
if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
struct in6_multi *in6m;
m->m_flags = (m->m_flags & ~M_BCAST) | M_MCAST;
-
- in6_ifstat_inc(ifp, ifs6_out_mcast);
+ in6_ifstat_inc_na(ifp, ifs6_out_mcast);
/*
* Confirm that the outgoing interface supports multicast.
*/
- if ((ifp->if_flags & IFF_MULTICAST) == 0) {
+ if (!(ifp->if_flags & IFF_MULTICAST)) {
ip6stat.ip6s_noroute++;
in6_ifstat_inc(ifp, ifs6_out_discard);
error = ENETUNREACH;
if (im6o != NULL)
IM6O_LOCK(im6o);
if (in6m != NULL &&
- (im6o == NULL || im6o->im6o_multicast_loop)) {
+ (im6o == NULL || im6o->im6o_multicast_loop)) {
if (im6o != NULL)
IM6O_UNLOCK(im6o);
/*
* on the outgoing interface, and the caller did not
* forbid loopback, loop back a copy.
*/
- ip6_mloopback(ifp, m, dst);
- } else {
- if (im6o != NULL)
- IM6O_UNLOCK(im6o);
- /*
- * If we are acting as a multicast router, perform
- * multicast forwarding as if the packet had just
- * arrived on the interface to which we are about
- * to send. The multicast forwarding function
- * recursively calls this function, using the
- * IPV6_FORWARDING flag to prevent infinite recursion.
- *
- * Multicasts that are looped back by ip6_mloopback(),
- * above, will be forwarded by the ip6_input() routine,
- * if necessary.
- */
-#if MROUTING
- if (ip6_mrouter && (flags & IPV6_FORWARDING) == 0) {
- /*
- * XXX: ip6_mforward expects that rcvif is NULL
- * when it is called from the originating path.
- * However, it is not always the case, since
- * some versions of MGETHDR() does not
- * initialize the field.
- */
- m->m_pkthdr.rcvif = NULL;
- if (ip6_mforward(ip6, ifp, m) != 0) {
- m_freem(m);
- if (in6m != NULL)
- IN6M_REMREF(in6m);
- goto done;
- }
- }
-#endif
- }
+ ip6_mloopback(NULL, ifp, m, dst, optlen, nxt0);
+ } else if (im6o != NULL)
+ IM6O_UNLOCK(im6o);
if (in6m != NULL)
IN6M_REMREF(in6m);
/*
*/
if (ip6->ip6_hlim == 0 || (ifp->if_flags & IFF_LOOPBACK) ||
IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst)) {
- m_freem(m);
- goto done;
+ /* remove m from the packetchain and continue looping */
+ if (m != NULL)
+ m_freem(m);
+ m = NULL;
+ goto evaluateloop;
}
}
* Fill the outgoing inteface to tell the upper layer
* to increment per-interface statistics.
*/
- if (ifpp != NULL) {
+ if (ifpp != NULL && *ifpp == NULL) {
ifnet_reference(ifp); /* for caller */
- if (*ifpp != NULL)
- ifnet_release(*ifpp);
*ifpp = ifp;
}
* See RFC 3542 for more details.
*/
if (mtu > IPV6_MMTU) {
- if ((flags & IPV6_MINMTU))
+ if ((flags & IPV6_MINMTU)) {
mtu = IPV6_MMTU;
- else if (opt && opt->ip6po_minmtu == IP6PO_MINMTU_ALL)
+ } else if (opt && opt->ip6po_minmtu == IP6PO_MINMTU_ALL) {
mtu = IPV6_MMTU;
- else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
- (opt == NULL ||
- opt->ip6po_minmtu != IP6PO_MINMTU_DISABLE)) {
+ } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
+ (opt == NULL ||
+ opt->ip6po_minmtu != IP6PO_MINMTU_DISABLE)) {
mtu = IPV6_MMTU;
}
}
/*
* Check with the firewall...
*/
- if (ip6_fw_enable && ip6_fw_chk_ptr) {
+ if (ip6_fw_enable && ip6_fw_chk_ptr) {
u_short port = 0;
m->m_pkthdr.rcvif = NULL; /* XXX */
/* If ipfw says divert, we have to just drop packet */
- if (ip6_fw_chk_ptr(&ip6, ifp, &port, &m)) {
- m_freem(m);
- goto done;
- }
- if (!m) {
- error = EACCES;
- goto done;
+ if (ip6_fw_chk_ptr(&ip6, ifp, &port, &m) || m == NULL) {
+ if (m != NULL) {
+ m_freem(m);
+ m = NULL;
+ goto evaluateloop;
+ } else {
+ error = EACCES;
+ goto bad;
+ }
}
}
-#endif
+#endif /* IPFW2 */
/*
* If the outgoing packet contains a hop-by-hop options header,
* it must be examined and processed even by the source node.
* (RFC 2460, section 4.)
*/
- if (exthdrs.ip6e_hbh) {
+ if (exthdrs.ip6e_hbh != NULL) {
struct ip6_hbh *hbh = mtod(exthdrs.ip6e_hbh, struct ip6_hbh *);
u_int32_t dummy; /* XXX unused */
-
+ uint32_t oplen = 0; /* for ip6_process_hopopts() */
#if DIAGNOSTIC
if ((hbh->ip6h_len + 1) << 3 > exthdrs.ip6e_hbh->m_len)
panic("ip6e_hbh is not continuous");
#endif
/*
- * XXX: if we have to send an ICMPv6 error to the sender,
- * we need the M_LOOP flag since icmp6_error() expects
- * the IPv6 and the hop-by-hop options header are
- * continuous unless the flag is set.
+ * XXX: If we have to send an ICMPv6 error to the sender,
+ * we need the M_LOOP flag since icmp6_error() expects
+ * the IPv6 and the hop-by-hop options header are
+ * continuous unless the flag is set.
*/
m->m_flags |= M_LOOP;
m->m_pkthdr.rcvif = ifp;
if (ip6_process_hopopts(m, (u_int8_t *)(hbh + 1),
- ((hbh->ip6h_len + 1) << 3) - sizeof(struct ip6_hbh),
- &dummy, &plen) < 0) {
- /* m was already freed at this point */
- error = EINVAL;/* better error? */
- goto done;
+ ((hbh->ip6h_len + 1) << 3) - sizeof (struct ip6_hbh),
+ &dummy, &oplen) < 0) {
+ /*
+ * m was already freed at this point. Set to NULL so it
+ * is not re-freed at end of ip6_output_list.
+ */
+ m = NULL;
+ error = EINVAL; /* better error? */
+ goto bad;
}
m->m_flags &= ~M_LOOP; /* XXX */
m->m_pkthdr.rcvif = NULL;
#if DUMMYNET
check_with_pf:
-#endif
+#endif /* DUMMYNET */
#if PF
if (PF_IS_ENABLED) {
#if DUMMYNET
+
/*
- * TBD: Need to save opt->ip6po_flags for reinjection rdar://10434993
+ * TODO: Need to save opt->ip6po_flags for reinjection
+ * rdar://10434993
*/
args.fwa_m = m;
args.fwa_oif = ifp;
args.fwa_oflags = flags;
- if ((flags & IPV6_OUTARGS))
- args.fwa_ip6oa = &ip6oa;
+ if (flags & IPV6_OUTARGS)
+ args.fwa_ip6oa = ip6oa;
args.fwa_ro6 = ro;
args.fwa_dst6 = dst;
args.fwa_ro6_pmtu = ro_pmtu;
args.fwa_exthdrs = &exthdrs;
/* Invoke outbound packet filter */
error = pf_af_hook(ifp, NULL, &m, AF_INET6, FALSE, &args);
-#else
+#else /* !DUMMYNET */
error = pf_af_hook(ifp, NULL, &m, AF_INET6, FALSE, NULL);
-#endif /* DUMMYNET */
+#endif /* !DUMMYNET */
if (error != 0 || m == NULL) {
- /*
- * Note that if we ever handle packet chain, we will
- * have to restore the linkage from the previous
- * packet to the next like in ip_outout_list()
- */
if (m != NULL) {
- panic("%s: unexpected packet %p\n", __func__, m);
+ panic("%s: unexpected packet %p\n",
+ __func__, m);
/* NOTREACHED */
}
- /* Already freed by callee */
- goto done;
+ /* m was already freed by callee and is now NULL. */
+ goto evaluateloop;
}
ip6 = mtod(m, struct ip6_hdr *);
}
#endif /* PF */
+#ifdef IPSEC
+ /* clean ipsec history before fragmentation */
+ ipsec_delaux(m);
+#endif /* IPSEC */
+
/*
- * Send the packet to the outgoing interface.
- * If necessary, do IPv6 fragmentation before sending.
- *
- * the logic here is rather complex:
- * 1: normal case (dontfrag == 0, alwaysfrag == 0)
- * 1-a: send as is if tlen <= path mtu
- * 1-b: fragment if tlen > path mtu
- *
- * 2: if user asks us not to fragment (dontfrag == 1)
- * 2-a: send as is if tlen <= interface mtu
- * 2-b: error if tlen > interface mtu
- *
- * 3: if we always need to attach fragment header (alwaysfrag == 1)
- * always fragment
- *
- * 4: if dontfrag == 1 && alwaysfrag == 1
- * error, as we cannot handle this conflicting request
+ * Determine whether fragmentation is necessary. If so, m is passed
+ * back as a chain of packets and original mbuf is freed. Otherwise, m
+ * is unchanged.
*/
- tlen = m->m_pkthdr.len;
+ error = ip6_fragment_packet(&m, opt,
+ &exthdrs, ifp, mtu, alwaysfrag, unfragpartlen, ro_pmtu, nxt0,
+ optlen);
+
+ if (error)
+ goto bad;
+
+/*
+ * The evaluateloop label is where we decide whether to continue looping over
+ * packets or call into nd code to send.
+ */
+evaluateloop:
+
+ /*
+ * m may be NULL when we jump to the evaluateloop label from PF or
+ * other code that can drop packets.
+ */
+ if (m != NULL) {
+ /*
+ * If we already have a chain to send, tack m onto the end.
+ * Otherwise make m the start and end of the to-be-sent chain.
+ */
+ if (sendchain != NULL) {
+ sendchain_last->m_nextpkt = m;
+ } else {
+ sendchain = m;
+ }
+
+ /* Fragmentation may mean m is a chain. Find the last packet. */
+ while (m->m_nextpkt)
+ m = m->m_nextpkt;
+ sendchain_last = m;
+ pktcnt++;
+ }
+
+ /* Fill in next m from inputchain as appropriate. */
+ m = inputchain;
+ if (m != NULL) {
+ /* Isolate m from rest of input chain. */
+ inputchain = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+
+ /*
+ * Clear exthdrs and ipsec_state so stale contents are not
+ * reused. Note this also clears the exthdrs.merged flag.
+ */
+ bzero(&exthdrs, sizeof(exthdrs));
+ bzero(&ipsec_state, sizeof(ipsec_state));
+
+ /* Continue looping. */
+ goto loopit;
+ }
+
+ /*
+ * If we get here, there's no more mbufs in inputchain, so send the
+ * sendchain if there is one.
+ */
+ if (pktcnt > 0) {
+ error = nd6_output_list(ifp, origifp, sendchain, dst,
+ ro->ro_rt, adv);
+ /*
+ * Fall through to done label even in error case because
+ * nd6_output_list frees packetchain in both success and
+ * failure cases.
+ */
+ }
+
+done:
+ if (ifpp_save != NULL && *ifpp_save != NULL) {
+ ifnet_release(*ifpp_save);
+ *ifpp_save = NULL;
+ }
+ ROUTE_RELEASE(&ip6route);
+#if IPSEC
+ ROUTE_RELEASE(&ipsec_state.ro);
+ if (sp != NULL)
+ key_freesp(sp, KEY_SADB_UNLOCKED);
+#endif /* IPSEC */
+#if NECP
+ ROUTE_RELEASE(&necp_route);
+#endif /* NECP */
+#if DUMMYNET
+ ROUTE_RELEASE(&saved_route);
+ ROUTE_RELEASE(&saved_ro_pmtu);
+#endif /* DUMMYNET */
+
+ if (ia != NULL)
+ IFA_REMREF(&ia->ia_ifa);
+ if (src_ia != NULL)
+ IFA_REMREF(&src_ia->ia_ifa);
+ if (ifp != NULL)
+ ifnet_release(ifp);
+ if (origifp != NULL)
+ ifnet_release(origifp);
+ if (ip6_output_measure) {
+ net_perf_measure_time(&net_perf, &start_tv, packets_processed);
+ net_perf_histogram(&net_perf, packets_processed);
+ }
+ return (error);
+
+freehdrs:
+ if (exthdrs.ip6e_hbh != NULL) {
+ if (exthdrs.merged)
+ panic("Double free of ip6e_hbh");
+ m_freem(exthdrs.ip6e_hbh);
+ }
+ if (exthdrs.ip6e_dest1 != NULL) {
+ if (exthdrs.merged)
+ panic("Double free of ip6e_dest1");
+ m_freem(exthdrs.ip6e_dest1);
+ }
+ if (exthdrs.ip6e_rthdr != NULL) {
+ if (exthdrs.merged)
+ panic("Double free of ip6e_rthdr");
+ m_freem(exthdrs.ip6e_rthdr);
+ }
+ if (exthdrs.ip6e_dest2 != NULL) {
+ if (exthdrs.merged)
+ panic("Double free of ip6e_dest2");
+ m_freem(exthdrs.ip6e_dest2);
+ }
+ /* FALLTHRU */
+bad:
+ if (inputchain != NULL)
+ m_freem_list(inputchain);
+ if (sendchain != NULL)
+ m_freem_list(sendchain);
+ if (m != NULL)
+ m_freem(m);
+
+ goto done;
+
+#undef ipf_pktopts
+#undef exthdrs
+#undef ip6route
+#undef ipsec_state
+#undef saved_route
+#undef saved_ro_pmtu
+#undef args
+}
+
+/* ip6_fragment_packet
+ *
+ * The fragmentation logic is rather complex:
+ * 1: normal case (dontfrag == 0, alwaysfrag == 0)
+ * 1-a: send as is if tlen <= path mtu
+ * 1-b: fragment if tlen > path mtu
+ *
+ * 2: if user asks us not to fragment (dontfrag == 1)
+ * 2-a: send as is if tlen <= interface mtu
+ * 2-b: error if tlen > interface mtu
+ *
+ * 3: if we always need to attach fragment header (alwaysfrag == 1)
+ * always fragment
+ *
+ * 4: if dontfrag == 1 && alwaysfrag == 1
+ * error, as we cannot handle this conflicting request
+ */
+
+static int
+ip6_fragment_packet(struct mbuf **mptr, struct ip6_pktopts *opt,
+ struct ip6_exthdrs *exthdrsp, struct ifnet *ifp, uint32_t mtu,
+ boolean_t alwaysfrag, uint32_t unfragpartlen, struct route_in6 *ro_pmtu,
+ int nxt0, uint32_t optlen)
+{
+ VERIFY(NULL != mptr);
+ struct mbuf *m = *mptr;
+ int error = 0;
+ size_t tlen = m->m_pkthdr.len;
+ boolean_t dontfrag = (opt != NULL && (opt->ip6po_flags & IP6PO_DONTFRAG));
- if (opt && (opt->ip6po_flags & IP6PO_DONTFRAG))
- dontfrag = 1;
- else
- dontfrag = 0;
if (dontfrag && alwaysfrag) { /* case 4 */
/* conflicting request - can't transmit */
- error = EMSGSIZE;
- goto bad;
+ return EMSGSIZE;
}
- lck_rw_lock_shared(nd_if_rwlock);
/* Access without acquiring nd_ifinfo lock for performance */
- ifmtu = IN6_LINKMTU(ifp);
- lck_rw_done(nd_if_rwlock);
-
- if (dontfrag && tlen > ifmtu) { /* case 2-b */
+ if (dontfrag && tlen > IN6_LINKMTU(ifp)) { /* case 2-b */
/*
* Even if the DONTFRAG option is specified, we cannot send the
* packet when the data length is larger than the MTU of the
struct ip6ctlparam ip6cp;
mtu32 = (u_int32_t)mtu;
- bzero(&ip6cp, sizeof(ip6cp));
+ bzero(&ip6cp, sizeof (ip6cp));
ip6cp.ip6c_cmdarg = (void *)&mtu32;
- pfctlinput2(PRC_MSGSIZE, (struct sockaddr *)&ro_pmtu->ro_dst,
- (void *)&ip6cp);
-
- error = EMSGSIZE;
- goto bad;
+ pfctlinput2(PRC_MSGSIZE, SA(&ro_pmtu->ro_dst), (void *)&ip6cp);
+ return EMSGSIZE;
}
/*
* transmit packet without fragmentation
*/
- tso = (ifp->if_hwassist & IFNET_TSO_IPV6) &&
- (m->m_pkthdr.csum_flags & CSUM_TSO_IPV6);
if (dontfrag || (!alwaysfrag && /* case 1-a and 2-a */
- (tlen <= mtu || tso || (ifp->if_hwassist & CSUM_FRAGMENT_IPV6)))) {
- int sw_csum;
+ (tlen <= mtu || TSO_IPV6_OK(ifp, m) ||
+ (ifp->if_hwassist & CSUM_FRAGMENT_IPV6)))) {
+ /*
+ * mppn not updated in this case because no new chain is formed
+ * and inserted
+ */
+ ip6_output_checksum(ifp, mtu, m, nxt0, tlen, optlen);
+ } else {
+ /*
+ * time to fragment - cases 1-b and 3 are handled inside
+ * ip6_do_fragmentation().
+ * mppn is passed down to be updated to point at fragment chain.
+ */
+ error = ip6_do_fragmentation(mptr, optlen, ifp,
+ unfragpartlen, mtod(m, struct ip6_hdr *), exthdrsp, mtu, nxt0);
+ }
- ip6 = mtod(m, struct ip6_hdr *);
-#ifdef IPSEC
- /* clean ipsec history once it goes out of the node */
- ipsec_delaux(m);
-#endif
+ return error;
+}
- if (apple_hwcksum_tx == 0) /* Do not let HW handle cksum */
- sw_csum = m->m_pkthdr.csum_flags;
- else
- sw_csum = m->m_pkthdr.csum_flags &
- ~IF_HWASSIST_CSUM_FLAGS(ifp->if_hwassist);
+/*
+ * ip6_do_fragmentation() is called by ip6_fragment_packet() after determining
+ * the packet needs to be fragmented. on success, morig is freed and a chain
+ * of fragments is linked into the packet chain where morig existed. Otherwise,
+ * an errno is returned.
+ */
+static int
+ip6_do_fragmentation(struct mbuf **mptr, uint32_t optlen, struct ifnet *ifp,
+ uint32_t unfragpartlen, struct ip6_hdr *ip6, struct ip6_exthdrs *exthdrsp,
+ uint32_t mtu, int nxt0)
+{
+ VERIFY(NULL != mptr);
+ int error = 0;
- if ((sw_csum & CSUM_DELAY_IPV6_DATA) != 0) {
- in6_delayed_cksum(m, sizeof(struct ip6_hdr) + optlen);
- m->m_pkthdr.csum_flags &= ~CSUM_DELAY_IPV6_DATA;
- }
- if (ro->ro_rt)
- RT_LOCK_ASSERT_NOTHELD(ro->ro_rt);
- error = nd6_output(ifp, origifp, m, dst, ro->ro_rt, adv);
- goto done;
- }
+ struct mbuf *morig = *mptr;
+ struct mbuf *first_mbufp = NULL;
+ struct mbuf *last_mbufp = NULL;
+
+ size_t tlen = morig->m_pkthdr.len;
/*
* try to fragment the packet. case 1-b and 3
*/
- if (mtu < IPV6_MMTU) {
+ if ((morig->m_pkthdr.csum_flags & CSUM_TSO_IPV6)) {
+ /* TSO and fragment aren't compatible */
+ in6_ifstat_inc(ifp, ifs6_out_fragfail);
+ return EMSGSIZE;
+ } else if (mtu < IPV6_MMTU) {
/* path MTU cannot be less than IPV6_MMTU */
- error = EMSGSIZE;
in6_ifstat_inc(ifp, ifs6_out_fragfail);
- goto bad;
+ return EMSGSIZE;
} else if (ip6->ip6_plen == 0) {
/* jumbo payload cannot be fragmented */
- error = EMSGSIZE;
in6_ifstat_inc(ifp, ifs6_out_fragfail);
- goto bad;
+ return EMSGSIZE;
} else {
- struct mbuf **mnext, *m_frgpart;
+ size_t hlen, len, off;
+ struct mbuf **mnext = NULL;
struct ip6_frag *ip6f;
u_int32_t id = htonl(ip6_randomid());
u_char nextproto;
if (mtu > IPV6_MAXPACKET)
mtu = IPV6_MAXPACKET;
- len = (mtu - hlen - sizeof(struct ip6_frag)) & ~7;
+ len = (mtu - hlen - sizeof (struct ip6_frag)) & ~7;
if (len < 8) {
- error = EMSGSIZE;
in6_ifstat_inc(ifp, ifs6_out_fragfail);
- goto bad;
+ return EMSGSIZE;
}
- mnext = &m->m_nextpkt;
-
/*
* Change the next header field of the last header in the
* unfragmentable part.
*/
- if (exthdrs.ip6e_rthdr) {
- nextproto = *mtod(exthdrs.ip6e_rthdr, u_char *);
- *mtod(exthdrs.ip6e_rthdr, u_char *) = IPPROTO_FRAGMENT;
- } else if (exthdrs.ip6e_dest1) {
- nextproto = *mtod(exthdrs.ip6e_dest1, u_char *);
- *mtod(exthdrs.ip6e_dest1, u_char *) = IPPROTO_FRAGMENT;
- } else if (exthdrs.ip6e_hbh) {
- nextproto = *mtod(exthdrs.ip6e_hbh, u_char *);
- *mtod(exthdrs.ip6e_hbh, u_char *) = IPPROTO_FRAGMENT;
+ if (exthdrsp->ip6e_rthdr != NULL) {
+ nextproto = *mtod(exthdrsp->ip6e_rthdr, u_char *);
+ *mtod(exthdrsp->ip6e_rthdr, u_char *) = IPPROTO_FRAGMENT;
+ } else if (exthdrsp->ip6e_dest1 != NULL) {
+ nextproto = *mtod(exthdrsp->ip6e_dest1, u_char *);
+ *mtod(exthdrsp->ip6e_dest1, u_char *) = IPPROTO_FRAGMENT;
+ } else if (exthdrsp->ip6e_hbh != NULL) {
+ nextproto = *mtod(exthdrsp->ip6e_hbh, u_char *);
+ *mtod(exthdrsp->ip6e_hbh, u_char *) = IPPROTO_FRAGMENT;
} else {
nextproto = ip6->ip6_nxt;
ip6->ip6_nxt = IPPROTO_FRAGMENT;
}
- if ((m->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA) != 0) {
- in6_delayed_cksum(m, sizeof(struct ip6_hdr) + optlen);
- m->m_pkthdr.csum_flags &= ~CSUM_DELAY_IPV6_DATA;
- }
+ if (morig->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA)
+ in6_delayed_cksum_offset(morig, 0, optlen, nxt0);
/*
* Loop through length of segment after first fragment,
* make new header and copy data of each part and link onto
* chain.
*/
- m0 = m;
for (off = hlen; off < tlen; off += len) {
- MGETHDR(m, M_DONTWAIT, MT_HEADER); /* MAC-OK */
- if (!m) {
+ struct ip6_hdr *new_mhip6;
+ struct mbuf *new_m;
+ struct mbuf *m_frgpart;
+
+ MGETHDR(new_m, M_DONTWAIT, MT_HEADER); /* MAC-OK */
+ if (new_m == NULL) {
error = ENOBUFS;
ip6stat.ip6s_odropped++;
- goto sendorfree;
+ break;
+ }
+ new_m->m_pkthdr.rcvif = NULL;
+ new_m->m_flags = morig->m_flags & M_COPYFLAGS;
+
+ if (first_mbufp != NULL) {
+ /* Every pass through loop but first */
+ *mnext = new_m;
+ last_mbufp = new_m;
+ } else {
+ /* This is the first element of the fragment chain */
+ first_mbufp = new_m;
+ last_mbufp = new_m;
}
- m->m_pkthdr.rcvif = NULL;
- m->m_flags = m0->m_flags & M_COPYFLAGS;
- *mnext = m;
- mnext = &m->m_nextpkt;
- m->m_data += max_linkhdr;
- mhip6 = mtod(m, struct ip6_hdr *);
- *mhip6 = *ip6;
- m->m_len = sizeof(*mhip6);
- error = ip6_insertfraghdr(m0, m, hlen, &ip6f);
- if (error) {
+ mnext = &new_m->m_nextpkt;
+
+ new_m->m_data += max_linkhdr;
+ new_mhip6 = mtod(new_m, struct ip6_hdr *);
+ *new_mhip6 = *ip6;
+ new_m->m_len = sizeof (*new_mhip6);
+
+ error = ip6_insertfraghdr(morig, new_m, hlen, &ip6f);
+ if (error) {
ip6stat.ip6s_odropped++;
- goto sendorfree;
+ break;
}
+
ip6f->ip6f_offlg = htons((u_short)((off - hlen) & ~7));
if (off + len >= tlen)
len = tlen - off;
else
ip6f->ip6f_offlg |= IP6F_MORE_FRAG;
- mhip6->ip6_plen = htons((u_short)(len + hlen +
- sizeof(*ip6f) -
- sizeof(struct ip6_hdr)));
- if ((m_frgpart = m_copy(m0, off, len)) == 0) {
+ new_mhip6->ip6_plen = htons((u_short)(len + hlen +
+ sizeof (*ip6f) - sizeof (struct ip6_hdr)));
+
+ if ((m_frgpart = m_copy(morig, off, len)) == NULL) {
error = ENOBUFS;
ip6stat.ip6s_odropped++;
- goto sendorfree;
+ break;
}
- m_cat(m, m_frgpart);
- m->m_pkthdr.len = len + hlen + sizeof(*ip6f);
- m->m_pkthdr.rcvif = 0;
- m->m_pkthdr.socket_id = m0->m_pkthdr.socket_id;
+ m_cat(new_m, m_frgpart);
+ new_m->m_pkthdr.len = len + hlen + sizeof (*ip6f);
+ new_m->m_pkthdr.rcvif = NULL;
- M_COPY_PFTAG(m, m0);
- m_set_service_class(m, m0->m_pkthdr.svc);
+ M_COPY_CLASSIFIER(new_m, morig);
+ M_COPY_PFTAG(new_m, morig);
-#ifdef __darwin8_notyet
+#ifdef notyet
#if CONFIG_MACF_NET
- mac_create_fragment(m0, m);
-#endif
-#endif
- ip6f->ip6f_reserved = 0;
- ip6f->ip6f_ident = id;
- ip6f->ip6f_nxt = nextproto;
- ip6stat.ip6s_ofragments++;
- in6_ifstat_inc(ifp, ifs6_out_fragcreat);
- }
-
- in6_ifstat_inc(ifp, ifs6_out_fragok);
- }
+ mac_create_fragment(morig, new_m);
+#endif /* CONFIG_MACF_NET */
+#endif /* notyet */
- /*
- * Remove leading garbages.
- */
-sendorfree:
- m = m0->m_nextpkt;
- m0->m_nextpkt = 0;
- m_freem(m0);
- for (m0 = m; m; m = m0) {
- m0 = m->m_nextpkt;
- m->m_nextpkt = 0;
- if (error == 0) {
- /* Record statistics for this interface address. */
- if (ia) {
-#ifndef __APPLE__
- ia->ia_ifa.if_opackets++;
- ia->ia_ifa.if_obytes += m->m_pkthdr.len;
-#endif
- }
-#if IPSEC
- /* clean ipsec history once it goes out of the node */
- ipsec_delaux(m);
-#endif
- error = nd6_output(ifp, origifp, m, dst, ro->ro_rt,
- adv);
-
- } else
- m_freem(m);
- }
-
- if (error == 0)
- ip6stat.ip6s_fragmented++;
-
-done:
-#if IPSEC
- if (ipsec_saved_route) {
- ro = ipsec_saved_route;
- if (ipsec_state.ro.ro_rt) {
- rtfree(ipsec_state.ro.ro_rt);
- }
- }
-#endif /* IPSEC */
- if (ro == &ip6route && ro->ro_rt) { /* brace necessary for rtfree */
- rtfree(ro->ro_rt);
- } else if (ro_pmtu == &ip6route && ro_pmtu->ro_rt) {
- rtfree(ro_pmtu->ro_rt);
- }
-
-#if IPSEC
- if (sp != NULL)
- key_freesp(sp, KEY_SADB_UNLOCKED);
-#endif /* IPSEC */
-
- if (ia != NULL)
- IFA_REMREF(&ia->ia_ifa);
- if (ifp != NULL)
- ifnet_release(ifp);
- if (origifp != NULL)
- ifnet_release(origifp);
- return (error);
+ ip6f->ip6f_reserved = 0;
+ ip6f->ip6f_ident = id;
+ ip6f->ip6f_nxt = nextproto;
+ ip6stat.ip6s_ofragments++;
+ in6_ifstat_inc(ifp, ifs6_out_fragcreat);
+ }
-freehdrs:
- m_freem(exthdrs.ip6e_hbh); /* m_freem will check if mbuf is 0 */
- m_freem(exthdrs.ip6e_dest1);
- m_freem(exthdrs.ip6e_rthdr);
- m_freem(exthdrs.ip6e_dest2);
- /* fall through */
-bad:
- m_freem(m);
- goto done;
+ if (error) {
+ /* free all the fragments created */
+ if (first_mbufp != NULL) {
+ m_freem_list(first_mbufp);
+ first_mbufp = NULL;
+ }
+ last_mbufp = NULL;
+ } else {
+ /* successful fragmenting */
+ m_freem(morig);
+ *mptr = first_mbufp;
+ last_mbufp->m_nextpkt = NULL;
+ ip6stat.ip6s_fragmented++;
+ in6_ifstat_inc(ifp, ifs6_out_fragok);
+ }
+ }
+ return error;
}
static int
-ip6_copyexthdr(mp, hdr, hlen)
- struct mbuf **mp;
- caddr_t hdr;
- int hlen;
+ip6_copyexthdr(struct mbuf **mp, caddr_t hdr, int hlen)
{
struct mbuf *m;
if (hlen > MCLBYTES)
- return(ENOBUFS); /* XXX */
+ return (ENOBUFS); /* XXX */
MGET(m, M_DONTWAIT, MT_DATA);
- if (!m)
- return(ENOBUFS);
+ if (m == NULL)
+ return (ENOBUFS);
if (hlen > MLEN) {
MCLGET(m, M_DONTWAIT);
- if ((m->m_flags & M_EXT) == 0) {
+ if (!(m->m_flags & M_EXT)) {
m_free(m);
return (ENOBUFS);
}
}
m->m_len = hlen;
- if (hdr)
+ if (hdr != NULL)
bcopy(hdr, mtod(m, caddr_t), hlen);
*mp = m;
return (0);
}
+static void
+ip6_out_cksum_stats(int proto, u_int32_t len)
+{
+ switch (proto) {
+ case IPPROTO_TCP:
+ tcp_out6_cksum_stats(len);
+ break;
+ case IPPROTO_UDP:
+ udp_out6_cksum_stats(len);
+ break;
+ default:
+ /* keep only TCP or UDP stats for now */
+ break;
+ }
+}
+
/*
- * Process a delayed payload checksum calculation.
+ * Process a delayed payload checksum calculation (outbound path.)
+ *
+ * hoff is the number of bytes beyond the mbuf data pointer which
+ * points to the IPv6 header. optlen is the number of bytes, if any,
+ * between the end of IPv6 header and the beginning of the ULP payload
+ * header, which represents the extension headers. If optlen is less
+ * than zero, this routine will bail when it detects extension headers.
+ *
+ * Returns a bitmask representing all the work done in software.
*/
-void
-in6_delayed_cksum(struct mbuf *m, uint16_t offset)
+uint32_t
+in6_finalize_cksum(struct mbuf *m, uint32_t hoff, int32_t optlen,
+ int32_t nxt0, uint32_t csum_flags)
{
- uint16_t csum;
+ unsigned char buf[sizeof (struct ip6_hdr)] __attribute__((aligned(8)));
+ struct ip6_hdr *ip6;
+ uint32_t offset, mlen, hlen, olen, sw_csum;
+ uint16_t csum, ulpoff, plen;
+ uint8_t nxt;
- csum = in6_cksum(m, 0, offset, m->m_pkthdr.len - offset);
- if (csum == 0 && (m->m_pkthdr.csum_flags & CSUM_UDPIPV6) != 0) {
- csum = 0xffff;
+ _CASSERT(sizeof (csum) == sizeof (uint16_t));
+ VERIFY(m->m_flags & M_PKTHDR);
+
+ sw_csum = (csum_flags & m->m_pkthdr.csum_flags);
+
+ if ((sw_csum &= CSUM_DELAY_IPV6_DATA) == 0)
+ goto done;
+
+ mlen = m->m_pkthdr.len; /* total mbuf len */
+ hlen = sizeof (*ip6); /* IPv6 header len */
+
+ /* sanity check (need at least IPv6 header) */
+ if (mlen < (hoff + hlen)) {
+ panic("%s: mbuf %p pkt len (%u) < hoff+ip6_hdr "
+ "(%u+%u)\n", __func__, m, mlen, hoff, hlen);
+ /* NOTREACHED */
+ }
+
+ /*
+ * In case the IPv6 header is not contiguous, or not 32-bit
+ * aligned, copy it to a local buffer.
+ */
+ if ((hoff + hlen) > m->m_len ||
+ !IP6_HDR_ALIGNED_P(mtod(m, caddr_t) + hoff)) {
+ m_copydata(m, hoff, hlen, (caddr_t)buf);
+ ip6 = (struct ip6_hdr *)(void *)buf;
+ } else {
+ ip6 = (struct ip6_hdr *)(void *)(m->m_data + hoff);
+ }
+
+ nxt = ip6->ip6_nxt;
+ plen = ntohs(ip6->ip6_plen);
+ if (plen != (mlen - (hoff + hlen))) {
+ plen = OSSwapInt16(plen);
+ if (plen != (mlen - (hoff + hlen))) {
+ /* Don't complain for jumbograms */
+ if (plen != 0 || nxt != IPPROTO_HOPOPTS) {
+ printf("%s: mbuf 0x%llx proto %d IPv6 "
+ "plen %d (%x) [swapped %d (%x)] doesn't "
+ "match actual packet length; %d is used "
+ "instead\n", __func__,
+ (uint64_t)VM_KERNEL_ADDRPERM(m), nxt,
+ ip6->ip6_plen, ip6->ip6_plen, plen, plen,
+ (mlen - (hoff + hlen)));
+ }
+ plen = mlen - (hoff + hlen);
+ }
+ }
+
+ if (optlen < 0) {
+ /* next header isn't TCP/UDP and we don't know optlen, bail */
+ if (nxt != IPPROTO_TCP && nxt != IPPROTO_UDP) {
+ sw_csum = 0;
+ goto done;
+ }
+ olen = 0;
+ } else {
+ /* caller supplied the original transport number; use it */
+ if (nxt0 >= 0)
+ nxt = nxt0;
+ olen = optlen;
+ }
+
+ offset = hoff + hlen + olen; /* ULP header */
+
+ /* sanity check */
+ if (mlen < offset) {
+ panic("%s: mbuf %p pkt len (%u) < hoff+ip6_hdr+ext_hdr "
+ "(%u+%u+%u)\n", __func__, m, mlen, hoff, hlen, olen);
+ /* NOTREACHED */
+ }
+
+ /*
+ * offset is added to the lower 16-bit value of csum_data,
+ * which is expected to contain the ULP offset; therefore
+ * CSUM_PARTIAL offset adjustment must be undone.
+ */
+ if ((m->m_pkthdr.csum_flags & (CSUM_PARTIAL|CSUM_DATA_VALID)) ==
+ (CSUM_PARTIAL|CSUM_DATA_VALID)) {
+ /*
+ * Get back the original ULP offset (this will
+ * undo the CSUM_PARTIAL logic in ip6_output.)
+ */
+ m->m_pkthdr.csum_data = (m->m_pkthdr.csum_tx_stuff -
+ m->m_pkthdr.csum_tx_start);
+ }
+
+ ulpoff = (m->m_pkthdr.csum_data & 0xffff); /* ULP csum offset */
+
+ if (mlen < (ulpoff + sizeof (csum))) {
+ panic("%s: mbuf %p pkt len (%u) proto %d invalid ULP "
+ "cksum offset (%u) cksum flags 0x%x\n", __func__,
+ m, mlen, nxt, ulpoff, m->m_pkthdr.csum_flags);
+ /* NOTREACHED */
}
- offset += (m->m_pkthdr.csum_data & 0xffff);
- if ((offset + sizeof(csum)) > m->m_len) {
- m_copyback(m, offset, sizeof(csum), &csum);
- } else if (IP6_HDR_ALIGNED_P(mtod(m, char *))) {
+ csum = inet6_cksum(m, 0, offset, plen - olen);
+
+ /* Update stats */
+ ip6_out_cksum_stats(nxt, plen - olen);
+
+ /* RFC1122 4.1.3.4 */
+ if (csum == 0 && (m->m_pkthdr.csum_flags & CSUM_UDPIPV6))
+ csum = 0xffff;
+
+ /* Insert the checksum in the ULP csum field */
+ offset += ulpoff;
+ if ((offset + sizeof (csum)) > m->m_len) {
+ m_copyback(m, offset, sizeof (csum), &csum);
+ } else if (IP6_HDR_ALIGNED_P(mtod(m, char *) + hoff)) {
*(uint16_t *)(void *)(mtod(m, char *) + offset) = csum;
} else {
bcopy(&csum, (mtod(m, char *) + offset), sizeof (csum));
}
+ m->m_pkthdr.csum_flags &=
+ ~(CSUM_DELAY_IPV6_DATA | CSUM_DATA_VALID | CSUM_PARTIAL);
+
+done:
+ return (sw_csum);
}
+
/*
* Insert jumbo payload option.
*/
static int
-ip6_insert_jumboopt(exthdrs, plen)
- struct ip6_exthdrs *exthdrs;
- u_int32_t plen;
+ip6_insert_jumboopt(struct ip6_exthdrs *exthdrs, u_int32_t plen)
{
struct mbuf *mopt;
u_char *optbuf;
u_int32_t v;
-#define JUMBOOPTLEN 8 /* length of jumbo payload option and padding */
+#define JUMBOOPTLEN 8 /* length of jumbo payload option and padding */
/*
* If there is no hop-by-hop options header, allocate new one.
* jumbo payload option, allocate a cluster to store the whole options.
* Otherwise, use it to store the options.
*/
- if (exthdrs->ip6e_hbh == 0) {
+ if (exthdrs->ip6e_hbh == NULL) {
MGET(mopt, M_DONTWAIT, MT_DATA);
- if (mopt == 0)
+ if (mopt == NULL)
return (ENOBUFS);
mopt->m_len = JUMBOOPTLEN;
optbuf = mtod(mopt, u_char *);
* at this point.
*/
MGET(n, M_DONTWAIT, MT_DATA);
- if (n) {
+ if (n != NULL) {
MCLGET(n, M_DONTWAIT);
- if ((n->m_flags & M_EXT) == 0) {
+ if (!(n->m_flags & M_EXT)) {
m_freem(n);
n = NULL;
}
}
- if (!n)
+ if (n == NULL)
return (ENOBUFS);
n->m_len = oldoptlen + JUMBOOPTLEN;
bcopy(mtod(mopt, caddr_t), mtod(n, caddr_t),
optbuf[2] = IP6OPT_JUMBO;
optbuf[3] = 4;
v = (u_int32_t)htonl(plen + JUMBOOPTLEN);
- bcopy(&v, &optbuf[4], sizeof(u_int32_t));
+ bcopy(&v, &optbuf[4], sizeof (u_int32_t));
/* finally, adjust the packet header length */
exthdrs->ip6e_ip6->m_pkthdr.len += JUMBOOPTLEN;
* Insert fragment header and copy unfragmentable header portions.
*/
static int
-ip6_insertfraghdr(m0, m, hlen, frghdrp)
- struct mbuf *m0, *m;
- int hlen;
- struct ip6_frag **frghdrp;
+ip6_insertfraghdr(struct mbuf *m0, struct mbuf *m, int hlen,
+ struct ip6_frag **frghdrp)
{
struct mbuf *n, *mlast;
- if (hlen > sizeof(struct ip6_hdr)) {
- n = m_copym(m0, sizeof(struct ip6_hdr),
- hlen - sizeof(struct ip6_hdr), M_DONTWAIT);
- if (n == 0)
+ if (hlen > sizeof (struct ip6_hdr)) {
+ n = m_copym(m0, sizeof (struct ip6_hdr),
+ hlen - sizeof (struct ip6_hdr), M_DONTWAIT);
+ if (n == NULL)
return (ENOBUFS);
m->m_next = n;
} else
for (mlast = n; mlast->m_next; mlast = mlast->m_next)
;
- if ((mlast->m_flags & M_EXT) == 0 &&
- M_TRAILINGSPACE(mlast) >= sizeof(struct ip6_frag)) {
- /* use the trailing space of the last mbuf for the fragment hdr */
+ if (!(mlast->m_flags & M_EXT) &&
+ M_TRAILINGSPACE(mlast) >= sizeof (struct ip6_frag)) {
+ /* use the trailing space of the last mbuf for the frag hdr */
*frghdrp = (struct ip6_frag *)(mtod(mlast, caddr_t) +
mlast->m_len);
- mlast->m_len += sizeof(struct ip6_frag);
- m->m_pkthdr.len += sizeof(struct ip6_frag);
+ mlast->m_len += sizeof (struct ip6_frag);
+ m->m_pkthdr.len += sizeof (struct ip6_frag);
} else {
/* allocate a new mbuf for the fragment header */
struct mbuf *mfrg;
MGET(mfrg, M_DONTWAIT, MT_DATA);
- if (mfrg == 0)
+ if (mfrg == NULL)
return (ENOBUFS);
- mfrg->m_len = sizeof(struct ip6_frag);
+ mfrg->m_len = sizeof (struct ip6_frag);
*frghdrp = mtod(mfrg, struct ip6_frag *);
mlast->m_next = mfrg;
}
return (0);
}
-extern int load_ipfw(void);
static int
ip6_getpmtu(struct route_in6 *ro_pmtu, struct route_in6 *ro,
struct ifnet *ifp, struct in6_addr *dst, u_int32_t *mtup,
- int *alwaysfragp)
+ boolean_t *alwaysfragp)
{
u_int32_t mtu = 0;
- int alwaysfrag = 0;
+ boolean_t alwaysfrag = FALSE;
int error = 0;
if (ro_pmtu != ro) {
/* The first hop and the final destination may differ. */
- struct sockaddr_in6 *sa6_dst =
- (struct sockaddr_in6 *)&ro_pmtu->ro_dst;
- if (ro_pmtu->ro_rt &&
- ((ro_pmtu->ro_rt->rt_flags & RTF_UP) == 0 ||
- ro_pmtu->ro_rt->generation_id != route_generation ||
- !IN6_ARE_ADDR_EQUAL(&sa6_dst->sin6_addr, dst))) {
- rtfree(ro_pmtu->ro_rt);
- ro_pmtu->ro_rt = (struct rtentry *)NULL;
- }
+ struct sockaddr_in6 *sa6_dst = SIN6(&ro_pmtu->ro_dst);
+ if (ROUTE_UNUSABLE(ro_pmtu) ||
+ !IN6_ARE_ADDR_EQUAL(&sa6_dst->sin6_addr, dst))
+ ROUTE_RELEASE(ro_pmtu);
+
if (ro_pmtu->ro_rt == NULL) {
- bzero(sa6_dst, sizeof(*sa6_dst));
+ bzero(sa6_dst, sizeof (*sa6_dst));
sa6_dst->sin6_family = AF_INET6;
- sa6_dst->sin6_len = sizeof(struct sockaddr_in6);
+ sa6_dst->sin6_len = sizeof (struct sockaddr_in6);
sa6_dst->sin6_addr = *dst;
rtalloc_scoped((struct route *)ro_pmtu,
}
}
-
if (ro_pmtu->ro_rt != NULL) {
u_int32_t ifmtu;
- lck_rw_lock_shared(nd_if_rwlock);
+ if (ifp == NULL)
+ ifp = ro_pmtu->ro_rt->rt_ifp;
/* Access without acquiring nd_ifinfo lock for performance */
ifmtu = IN6_LINKMTU(ifp);
- lck_rw_done(nd_if_rwlock);
- RT_LOCK_SPIN(ro_pmtu->ro_rt);
+ /*
+ * Access rmx_mtu without holding the route entry lock,
+ * for performance; this isn't something that changes
+ * often, so optimize.
+ */
mtu = ro_pmtu->ro_rt->rt_rmx.rmx_mtu;
if (mtu > ifmtu || mtu == 0) {
/*
* if MTU on the route is 0, we need to fix the MTU.
* this case happens with path MTU discovery timeouts.
*/
- mtu = ifmtu;
- if ((ro_pmtu->ro_rt->rt_rmx.rmx_locks & RTV_MTU) == 0)
- ro_pmtu->ro_rt->rt_rmx.rmx_mtu = mtu; /* XXX */
- }
- else if (mtu < IPV6_MMTU) {
+ mtu = ifmtu;
+ if (!(ro_pmtu->ro_rt->rt_rmx.rmx_locks & RTV_MTU))
+ ro_pmtu->ro_rt->rt_rmx.rmx_mtu = mtu; /* XXX */
+ } else if (mtu < IPV6_MMTU) {
/*
* RFC2460 section 5, last paragraph:
* if we record ICMPv6 too big message with
* (fragment header is needed regardless from the
* packet size, for translators to identify packets)
*/
- alwaysfrag = 1;
+ alwaysfrag = TRUE;
mtu = IPV6_MMTU;
- }
- RT_UNLOCK(ro_pmtu->ro_rt);
+ }
} else {
if (ifp) {
- lck_rw_lock_shared(nd_if_rwlock);
/* Don't hold nd_ifinfo lock for performance */
mtu = IN6_LINKMTU(ifp);
- lck_rw_done(nd_if_rwlock);
- } else
+ } else {
error = EHOSTUNREACH; /* XXX */
+ }
}
*mtup = mtu;
- if (alwaysfragp)
+ if (alwaysfragp != NULL)
*alwaysfragp = alwaysfrag;
return (error);
}
* IP6 socket option processing.
*/
int
-ip6_ctloutput(so, sopt)
- struct socket *so;
- struct sockopt *sopt;
+ip6_ctloutput(struct socket *so, struct sockopt *sopt)
{
int optdatalen, uproto;
void *optdata;
int optlen = 0;
struct proc *p;
- if (sopt == NULL) {
- panic("ip6_ctloutput: arg soopt is NULL");
- /* NOTREACHED */
- }
+ VERIFY(sopt != NULL);
+
level = sopt->sopt_level;
op = sopt->sopt_dir;
optname = sopt->sopt_name;
optlen = sopt->sopt_valsize;
p = sopt->sopt_p;
- uproto = (int)so->so_proto->pr_protocol;
+ uproto = (int)SOCK_PROTO(so);
privileged = (proc_suser(p) == 0);
if (level == IPPROTO_IPV6) {
switch (op) {
-
case SOPT_SET:
switch (optname) {
- case IPV6_2292PKTOPTIONS:
- {
+ case IPV6_2292PKTOPTIONS: {
struct mbuf *m;
- error = soopt_getm(sopt, &m); /* XXX */
+ error = soopt_getm(sopt, &m);
if (error != 0)
break;
- error = soopt_mcopyin(sopt, m); /* XXX */
+ error = soopt_mcopyin(sopt, m);
if (error != 0)
break;
error = ip6_pcbopts(&in6p->in6p_outputopts,
- m, so, sopt);
- m_freem(m); /* XXX */
+ m, so, sopt);
+ m_freem(m);
break;
}
case IPV6_RECVHOPOPTS:
case IPV6_RECVDSTOPTS:
case IPV6_RECVRTHDRDSTOPTS:
- if (!privileged)
- break;
+ if (!privileged)
+ break;
/* FALLTHROUGH */
case IPV6_UNICAST_HOPS:
case IPV6_HOPLIMIT:
-
case IPV6_RECVPKTINFO:
case IPV6_RECVHOPLIMIT:
case IPV6_RECVRTHDR:
case IPV6_RECVTCLASS:
case IPV6_V6ONLY:
case IPV6_AUTOFLOWLABEL:
- if (optlen != sizeof(int)) {
+ if (optlen != sizeof (int)) {
error = EINVAL;
break;
}
error = sooptcopyin(sopt, &optval,
- sizeof optval, sizeof optval);
+ sizeof (optval), sizeof (optval));
if (error)
break;
- switch (optname) {
+ switch (optname) {
case IPV6_UNICAST_HOPS:
- if (optval < -1 || optval >= 256)
+ if (optval < -1 || optval >= 256) {
error = EINVAL;
- else {
+ } else {
/* -1 = kernel default */
in6p->in6p_hops = optval;
- if ((in6p->inp_vflag &
- INP_IPV4) != 0)
- in6p->inp_ip_ttl = optval;
+ if (in6p->inp_vflag &
+ INP_IPV4) {
+ in6p->inp_ip_ttl =
+ optval;
+ }
}
break;
-#define OPTSET(bit) \
-do { \
- if (optval) \
- in6p->inp_flags |= (bit); \
- else \
- in6p->inp_flags &= ~(bit); \
-} while (/*CONSTCOND*/ 0)
-#define OPTSET2292(bit) \
-do { \
- in6p->inp_flags |= IN6P_RFC2292; \
- if (optval) \
- in6p->inp_flags |= (bit); \
- else \
- in6p->inp_flags &= ~(bit); \
-} while (/*CONSTCOND*/ 0)
-#define OPTBIT(bit) (in6p->inp_flags & (bit) ? 1 : 0)
+#define OPTSET(bit) do { \
+ if (optval) \
+ in6p->inp_flags |= (bit); \
+ else \
+ in6p->inp_flags &= ~(bit); \
+} while (0)
+
+#define OPTSET2292(bit) do { \
+ in6p->inp_flags |= IN6P_RFC2292; \
+ if (optval) \
+ in6p->inp_flags |= (bit); \
+ else \
+ in6p->inp_flags &= ~(bit); \
+} while (0)
+
+#define OPTBIT(bit) (in6p->inp_flags & (bit) ? 1 : 0)
case IPV6_RECVPKTINFO:
/* cannot mix with RFC2292 */
OPTSET(IN6P_PKTINFO);
break;
- case IPV6_HOPLIMIT:
- {
+ case IPV6_HOPLIMIT: {
struct ip6_pktopts **optp;
/* cannot mix with RFC2292 */
}
optp = &in6p->in6p_outputopts;
error = ip6_pcbopt(IPV6_HOPLIMIT,
- (u_char *)&optval, sizeof(optval),
+ (u_char *)&optval, sizeof (optval),
optp, uproto);
break;
}
* see ipng mailing list, Jun 22 2001.
*/
if (in6p->inp_lport ||
- !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
+ !IN6_IS_ADDR_UNSPECIFIED(
+ &in6p->in6p_laddr)) {
error = EINVAL;
break;
}
else
in6p->inp_vflag |= INP_IPV4;
break;
+
case IPV6_RECVTCLASS:
/* we can mix with RFC2292 */
OPTSET(IN6P_TCLASS);
break;
+
case IPV6_AUTOFLOWLABEL:
OPTSET(IN6P_AUTOFLOWLABEL);
break;
case IPV6_TCLASS:
case IPV6_DONTFRAG:
case IPV6_USE_MIN_MTU:
- case IPV6_PREFER_TEMPADDR:
- if (optlen != sizeof(optval)) {
+ case IPV6_PREFER_TEMPADDR: {
+ struct ip6_pktopts **optp;
+
+ if (optlen != sizeof (optval)) {
error = EINVAL;
break;
}
error = sooptcopyin(sopt, &optval,
- sizeof optval, sizeof optval);
+ sizeof (optval), sizeof (optval));
if (error)
break;
- {
- struct ip6_pktopts **optp;
- optp = &in6p->in6p_outputopts;
- error = ip6_pcbopt(optname,
- (u_char *)&optval, sizeof(optval),
- optp, uproto);
- break;
- }
+
+ optp = &in6p->in6p_outputopts;
+ error = ip6_pcbopt(optname, (u_char *)&optval,
+ sizeof (optval), optp, uproto);
+ break;
+ }
case IPV6_2292PKTINFO:
case IPV6_2292HOPLIMIT:
case IPV6_2292DSTOPTS:
case IPV6_2292RTHDR:
/* RFC 2292 */
- if (optlen != sizeof(int)) {
+ if (optlen != sizeof (int)) {
error = EINVAL;
break;
}
error = sooptcopyin(sopt, &optval,
- sizeof optval, sizeof optval);
+ sizeof (optval), sizeof (optval));
if (error)
break;
switch (optname) {
* See comments for IPV6_RECVHOPOPTS.
*/
if (!privileged)
- return(EPERM);
+ return (EPERM);
OPTSET2292(IN6P_HOPOPTS);
break;
case IPV6_2292DSTOPTS:
if (!privileged)
- return(EPERM);
- OPTSET2292(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS); /* XXX */
+ return (EPERM);
+ OPTSET2292(IN6P_DSTOPTS|
+ IN6P_RTHDRDSTOPTS); /* XXX */
break;
case IPV6_2292RTHDR:
OPTSET2292(IN6P_RTHDR);
break;
}
break;
+
case IPV6_3542PKTINFO:
case IPV6_3542HOPOPTS:
case IPV6_3542RTHDR:
case IPV6_3542DSTOPTS:
case IPV6_RTHDRDSTOPTS:
- case IPV6_3542NEXTHOP:
- {
+ case IPV6_3542NEXTHOP: {
struct ip6_pktopts **optp;
/* new advanced API (RFC3542) */
struct mbuf *m;
if (error != 0)
break;
error = soopt_mcopyin(sopt, m);
- if (error) {
- m_freem(m);
+ if (error != 0)
break;
- }
+
optp = &in6p->in6p_outputopts;
- error = ip6_pcbopt(optname, mtod(m, u_char *),
- m->m_len, optp, uproto);
+ error = ip6_pcbopt(optname, mtod(m, u_char *),
+ m->m_len, optp, uproto);
m_freem(m);
break;
}
#undef OPTSET
-
case IPV6_MULTICAST_IF:
case IPV6_MULTICAST_HOPS:
case IPV6_MULTICAST_LOOP:
case IPV6_PORTRANGE:
error = sooptcopyin(sopt, &optval,
- sizeof optval, sizeof optval);
+ sizeof (optval), sizeof (optval));
if (error)
break;
break;
}
break;
-
#if IPSEC
- case IPV6_IPSEC_POLICY:
- {
+ case IPV6_IPSEC_POLICY: {
caddr_t req = NULL;
size_t len = 0;
struct mbuf *m;
-
- if ((error = soopt_getm(sopt, &m)) != 0) /* XXX */
+
+ if ((error = soopt_getm(sopt, &m)) != 0)
break;
- if ((error = soopt_mcopyin(sopt, m)) != 0) /* XXX */
+ if ((error = soopt_mcopyin(sopt, m)) != 0)
break;
- if (m) {
- req = mtod(m, caddr_t);
- len = m->m_len;
- }
+
+ req = mtod(m, caddr_t);
+ len = m->m_len;
error = ipsec6_set_policy(in6p, optname, req,
- len, privileged);
+ len, privileged);
m_freem(m);
- }
break;
-#endif /* KAME IPSEC */
-
+ }
+#endif /* IPSEC */
#if IPFIREWALL
case IPV6_FW_ADD:
case IPV6_FW_DEL:
case IPV6_FW_FLUSH:
- case IPV6_FW_ZERO:
- {
+ case IPV6_FW_ZERO: {
if (ip6_fw_ctl_ptr == NULL)
load_ip6fw();
if (ip6_fw_ctl_ptr != NULL)
error = (*ip6_fw_ctl_ptr)(sopt);
else
- return ENOPROTOOPT;
- }
+ error = ENOPROTOOPT;
break;
+ }
#endif /* IPFIREWALL */
-
/*
* IPv6 variant of IP_BOUND_IF; for details see
* comments on IP_BOUND_IF in ip_ctloutput().
if (error)
break;
- error = inp_bindif(in6p, optval);
+ error = inp_bindif(in6p, optval, NULL);
break;
case IPV6_NO_IFT_CELLULAR:
if (error)
break;
- error = inp_nocellular(in6p, optval);
+ /* once set, it cannot be unset */
+ if (!optval && INP_NO_CELLULAR(in6p)) {
+ error = EINVAL;
+ break;
+ }
+
+ error = so_set_restrictions(so,
+ SO_RESTRICT_DENY_CELLULAR);
break;
case IPV6_OUT_IF:
case IPV6_RECVHOPLIMIT:
case IPV6_RECVRTHDR:
case IPV6_RECVPATHMTU:
-
case IPV6_V6ONLY:
case IPV6_PORTRANGE:
case IPV6_RECVTCLASS:
optval = OPTBIT(IN6P_IPV6_V6ONLY);
break;
- case IPV6_PORTRANGE:
- {
+ case IPV6_PORTRANGE: {
int flags;
flags = in6p->inp_flags;
if (flags & INP_HIGHPORT)
else
optval = 0;
break;
- }
+ }
case IPV6_RECVTCLASS:
optval = OPTBIT(IN6P_TCLASS);
break;
if (error)
break;
error = sooptcopyout(sopt, &optval,
- sizeof optval);
+ sizeof (optval));
break;
- case IPV6_PATHMTU:
- {
+ case IPV6_PATHMTU: {
u_int32_t pmtu = 0;
struct ip6_mtuinfo mtuinfo;
struct route_in6 sro;
- bzero(&sro, sizeof(sro));
+ bzero(&sro, sizeof (sro));
if (!(so->so_state & SS_ISCONNECTED))
return (ENOTCONN);
*/
error = ip6_getpmtu(&sro, NULL, NULL,
&in6p->in6p_faddr, &pmtu, NULL);
- if (sro.ro_rt)
- rtfree(sro.ro_rt);
+ ROUTE_RELEASE(&sro);
if (error)
break;
if (pmtu > IPV6_MAXPACKET)
pmtu = IPV6_MAXPACKET;
- bzero(&mtuinfo, sizeof(mtuinfo));
+ bzero(&mtuinfo, sizeof (mtuinfo));
mtuinfo.ip6m_mtu = (u_int32_t)pmtu;
optdata = (void *)&mtuinfo;
- optdatalen = sizeof(mtuinfo);
+ optdatalen = sizeof (mtuinfo);
error = sooptcopyout(sopt, optdata,
optdatalen);
break;
optval = OPTBIT(IN6P_RTHDR);
break;
case IPV6_2292DSTOPTS:
- optval = OPTBIT(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS);
+ optval = OPTBIT(IN6P_DSTOPTS|
+ IN6P_RTHDRDSTOPTS);
break;
}
error = sooptcopyout(sopt, &optval,
- sizeof optval);
+ sizeof (optval));
break;
+
case IPV6_PKTINFO:
case IPV6_HOPOPTS:
case IPV6_RTHDR:
case IPV6_MSFILTER:
error = ip6_getmoptions(in6p, sopt);
break;
-
#if IPSEC
- case IPV6_IPSEC_POLICY:
- {
- caddr_t req = NULL;
- size_t len = 0;
- struct mbuf *m = NULL;
- struct mbuf **mp = &m;
-
- error = soopt_getm(sopt, &m); /* XXX */
- if (error != 0)
- break;
- error = soopt_mcopyin(sopt, m); /* XXX */
- if (error != 0)
- break;
- if (m) {
- req = mtod(m, caddr_t);
- len = m->m_len;
- }
- error = ipsec6_get_policy(in6p, req, len, mp);
- if (error == 0)
- error = soopt_mcopyout(sopt, m); /*XXX*/
- if (error == 0 && m)
- m_freem(m);
+ case IPV6_IPSEC_POLICY: {
+ error = 0; /* This option is no longer supported */
break;
- }
-#endif /* KAME IPSEC */
-
+ }
+#endif /* IPSEC */
#if IPFIREWALL
- case IPV6_FW_GET:
- {
+ case IPV6_FW_GET: {
if (ip6_fw_ctl_ptr == NULL)
load_ip6fw();
if (ip6_fw_ctl_ptr != NULL)
error = (*ip6_fw_ctl_ptr)(sopt);
else
- return ENOPROTOOPT;
- }
+ error = ENOPROTOOPT;
break;
+ }
#endif /* IPFIREWALL */
-
case IPV6_BOUND_IF:
if (in6p->inp_flags & INP_BOUND_IF)
optval = in6p->inp_boundifp->if_index;
break;
case IPV6_NO_IFT_CELLULAR:
- optval = (in6p->inp_flags & INP_NO_IFT_CELLULAR)
- ? 1 : 0;
+ optval = INP_NO_CELLULAR(in6p) ? 1 : 0;
error = sooptcopyout(sopt, &optval,
sizeof (optval));
break;
}
break;
}
+ } else if (level == IPPROTO_UDP) {
+ error = udp_ctloutput(so, sopt);
} else {
error = EINVAL;
}
- return(error);
+ return (error);
}
int
optname = sopt->sopt_name;
optlen = sopt->sopt_valsize;
- if (level != IPPROTO_IPV6) {
+ if (level != IPPROTO_IPV6)
return (EINVAL);
- }
switch (optname) {
case IPV6_CHECKSUM:
*/
switch (op) {
case SOPT_SET:
- if (optlen != sizeof(int)) {
+ if (optlen != sizeof (int)) {
error = EINVAL;
break;
}
- error = sooptcopyin(sopt, &optval, sizeof(optval),
- sizeof(optval));
+ error = sooptcopyin(sopt, &optval, sizeof (optval),
+ sizeof (optval));
if (error)
break;
if ((optval % 2) != 0) {
/* the API assumes even offset values */
error = EINVAL;
- } else if (so->so_proto->pr_protocol ==
- IPPROTO_ICMPV6) {
+ } else if (SOCK_PROTO(so) == IPPROTO_ICMPV6) {
if (optval != icmp6off)
error = EINVAL;
- } else
+ } else {
in6p->in6p_cksum = optval;
+ }
break;
case SOPT_GET:
- if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
+ if (SOCK_PROTO(so) == IPPROTO_ICMPV6)
optval = icmp6off;
else
optval = in6p->in6p_cksum;
- error = sooptcopyout(sopt, &optval, sizeof(optval));
+ error = sooptcopyout(sopt, &optval, sizeof (optval));
break;
default:
* specifying behavior of outgoing packets.
*/
static int
-ip6_pcbopts(
- struct ip6_pktopts **pktopt,
- struct mbuf *m,
- __unused struct socket *so,
- __unused struct sockopt *sopt)
+ip6_pcbopts(struct ip6_pktopts **pktopt, struct mbuf *m, struct socket *so,
+ struct sockopt *sopt)
{
+#pragma unused(sopt)
struct ip6_pktopts *opt = *pktopt;
int error = 0;
/* turn off any old options. */
- if (opt) {
+ if (opt != NULL) {
#if DIAGNOSTIC
if (opt->ip6po_pktinfo || opt->ip6po_nexthop ||
opt->ip6po_hbh || opt->ip6po_dest1 || opt->ip6po_dest2 ||
opt->ip6po_rhinfo.ip6po_rhi_rthdr)
- printf("ip6_pcbopts: all specified options are cleared.\n");
+ printf("%s: all specified options are cleared.\n",
+ __func__);
#endif
ip6_clearpktopts(opt, -1);
} else {
- opt = _MALLOC(sizeof(*opt), M_IP6OPT, M_WAITOK);
+ opt = _MALLOC(sizeof (*opt), M_IP6OPT, M_WAITOK);
if (opt == NULL)
- return ENOBUFS;
+ return (ENOBUFS);
}
*pktopt = NULL;
- if (!m || m->m_len == 0) {
+ if (m == NULL || m->m_len == 0) {
/*
* Only turning off any previous options, regardless of
* whether the opt is just created or given.
*/
- if (opt)
+ if (opt != NULL)
FREE(opt, M_IP6OPT);
- return(0);
+ return (0);
}
/* set options specified by user. */
- if ((error = ip6_setpktopts(m, opt, NULL, so->so_proto->pr_protocol)) != 0) {
+ if ((error = ip6_setpktopts(m, opt, NULL, SOCK_PROTO(so))) != 0) {
ip6_clearpktopts(opt, -1); /* XXX: discard all options */
FREE(opt, M_IP6OPT);
- return(error);
+ return (error);
}
*pktopt = opt;
- return(0);
+ return (0);
}
/*
ip6_initpktopts(struct ip6_pktopts *opt)
{
- bzero(opt, sizeof(*opt));
+ bzero(opt, sizeof (*opt));
opt->ip6po_hlim = -1; /* -1 means default hop limit */
opt->ip6po_tclass = -1; /* -1 means default traffic class */
opt->ip6po_minmtu = IP6PO_MINMTU_MCASTONLY;
opt = *pktopt;
if (opt == NULL) {
- opt = _MALLOC(sizeof(*opt), M_IP6OPT, M_WAITOK);
+ opt = _MALLOC(sizeof (*opt), M_IP6OPT, M_WAITOK);
if (opt == NULL)
- return(ENOBUFS);
+ return (ENOBUFS);
ip6_initpktopts(opt);
*pktopt = opt;
}
void *optdata = NULL;
int optdatalen = 0;
struct ip6_ext *ip6e;
- int error = 0;
struct in6_pktinfo null_pktinfo;
int deftclass = 0, on;
int defminmtu = IP6PO_MINMTU_MCASTONLY;
optdata = (void *)pktopt->ip6po_pktinfo;
else {
/* XXX: we don't have to do this every time... */
- bzero(&null_pktinfo, sizeof(null_pktinfo));
+ bzero(&null_pktinfo, sizeof (null_pktinfo));
optdata = (void *)&null_pktinfo;
}
- optdatalen = sizeof(struct in6_pktinfo);
+ optdatalen = sizeof (struct in6_pktinfo);
break;
+
case IPV6_TCLASS:
if (pktopt && pktopt->ip6po_tclass >= 0)
optdata = (void *)&pktopt->ip6po_tclass;
else
optdata = (void *)&deftclass;
- optdatalen = sizeof(int);
+ optdatalen = sizeof (int);
break;
+
case IPV6_HOPOPTS:
if (pktopt && pktopt->ip6po_hbh) {
optdata = (void *)pktopt->ip6po_hbh;
optdatalen = (ip6e->ip6e_len + 1) << 3;
}
break;
+
case IPV6_RTHDR:
if (pktopt && pktopt->ip6po_rthdr) {
optdata = (void *)pktopt->ip6po_rthdr;
optdatalen = (ip6e->ip6e_len + 1) << 3;
}
break;
+
case IPV6_RTHDRDSTOPTS:
if (pktopt && pktopt->ip6po_dest1) {
optdata = (void *)pktopt->ip6po_dest1;
optdatalen = (ip6e->ip6e_len + 1) << 3;
}
break;
+
case IPV6_DSTOPTS:
if (pktopt && pktopt->ip6po_dest2) {
optdata = (void *)pktopt->ip6po_dest2;
optdatalen = (ip6e->ip6e_len + 1) << 3;
}
break;
+
case IPV6_NEXTHOP:
if (pktopt && pktopt->ip6po_nexthop) {
optdata = (void *)pktopt->ip6po_nexthop;
optdatalen = pktopt->ip6po_nexthop->sa_len;
}
break;
+
case IPV6_USE_MIN_MTU:
if (pktopt)
optdata = (void *)&pktopt->ip6po_minmtu;
else
optdata = (void *)&defminmtu;
- optdatalen = sizeof(int);
+ optdatalen = sizeof (int);
break;
+
case IPV6_DONTFRAG:
if (pktopt && ((pktopt->ip6po_flags) & IP6PO_DONTFRAG))
on = 1;
else
on = 0;
optdata = (void *)&on;
- optdatalen = sizeof(on);
+ optdatalen = sizeof (on);
break;
+
case IPV6_PREFER_TEMPADDR:
if (pktopt)
optdata = (void *)&pktopt->ip6po_prefer_tempaddr;
else
optdata = (void *)&defpreftemp;
- optdatalen = sizeof(int);
+ optdatalen = sizeof (int);
break;
+
default: /* should not happen */
#ifdef DIAGNOSTIC
panic("ip6_getpcbopt: unexpected option\n");
return (ENOPROTOOPT);
}
- error = sooptcopyout(sopt, optdata, optdatalen);
-
- return (error);
+ return (sooptcopyout(sopt, optdata, optdatalen));
}
void
if (optname == -1 || optname == IPV6_TCLASS)
pktopt->ip6po_tclass = -1;
if (optname == -1 || optname == IPV6_NEXTHOP) {
- if (pktopt->ip6po_nextroute.ro_rt) {
- rtfree(pktopt->ip6po_nextroute.ro_rt);
- pktopt->ip6po_nextroute.ro_rt = NULL;
- }
+ ROUTE_RELEASE(&pktopt->ip6po_nextroute);
if (pktopt->ip6po_nexthop)
FREE(pktopt->ip6po_nexthop, M_IP6OPT);
pktopt->ip6po_nexthop = NULL;
if (pktopt->ip6po_rhinfo.ip6po_rhi_rthdr)
FREE(pktopt->ip6po_rhinfo.ip6po_rhi_rthdr, M_IP6OPT);
pktopt->ip6po_rhinfo.ip6po_rhi_rthdr = NULL;
- if (pktopt->ip6po_route.ro_rt) {
- rtfree(pktopt->ip6po_route.ro_rt);
- pktopt->ip6po_route.ro_rt = NULL;
- }
+ ROUTE_RELEASE(&pktopt->ip6po_route);
}
if (optname == -1 || optname == IPV6_DSTOPTS) {
if (pktopt->ip6po_dest2)
}
}
-#define PKTOPT_EXTHDRCPY(type) \
-do {\
- if (src->type) {\
- int hlen =\
- (((struct ip6_ext *)src->type)->ip6e_len + 1) << 3;\
- dst->type = _MALLOC(hlen, M_IP6OPT, canwait);\
- if (dst->type == NULL && canwait == M_NOWAIT)\
- goto bad;\
- bcopy(src->type, dst->type, hlen);\
- }\
+#define PKTOPT_EXTHDRCPY(type) do { \
+ if (src->type) { \
+ int hlen = \
+ (((struct ip6_ext *)src->type)->ip6e_len + 1) << 3; \
+ dst->type = _MALLOC(hlen, M_IP6OPT, canwait); \
+ if (dst->type == NULL && canwait == M_NOWAIT) \
+ goto bad; \
+ bcopy(src->type, dst->type, hlen); \
+ } \
} while (0)
static int
dst->ip6po_tclass = src->ip6po_tclass;
dst->ip6po_flags = src->ip6po_flags;
if (src->ip6po_pktinfo) {
- dst->ip6po_pktinfo = _MALLOC(sizeof(*dst->ip6po_pktinfo),
- M_IP6OPT, canwait);
+ dst->ip6po_pktinfo = _MALLOC(sizeof (*dst->ip6po_pktinfo),
+ M_IP6OPT, canwait);
if (dst->ip6po_pktinfo == NULL && canwait == M_NOWAIT)
goto bad;
*dst->ip6po_pktinfo = *src->ip6po_pktinfo;
}
if (src->ip6po_nexthop) {
dst->ip6po_nexthop = _MALLOC(src->ip6po_nexthop->sa_len,
- M_IP6OPT, canwait);
+ M_IP6OPT, canwait);
if (dst->ip6po_nexthop == NULL && canwait == M_NOWAIT)
goto bad;
bcopy(src->ip6po_nexthop, dst->ip6po_nexthop,
- src->ip6po_nexthop->sa_len);
+ src->ip6po_nexthop->sa_len);
}
PKTOPT_EXTHDRCPY(ip6po_hbh);
PKTOPT_EXTHDRCPY(ip6po_dest1);
PKTOPT_EXTHDRCPY(ip6po_rthdr); /* not copy the cached route */
return (0);
- bad:
+bad:
ip6_clearpktopts(dst, -1);
return (ENOBUFS);
}
int error;
struct ip6_pktopts *dst;
- dst = _MALLOC(sizeof(*dst), M_IP6OPT, canwait);
+ dst = _MALLOC(sizeof (*dst), M_IP6OPT, canwait);
if (dst == NULL)
return (NULL);
ip6_initpktopts(dst);
ip6_setpktopts(struct mbuf *control, struct ip6_pktopts *opt,
struct ip6_pktopts *stickyopt, int uproto)
{
- struct cmsghdr *cm = 0;
+ struct cmsghdr *cm = NULL;
if (control == NULL || opt == NULL)
return (EINVAL);
if (control->m_len < CMSG_LEN(0))
return (EINVAL);
- for (cm = M_FIRST_CMSGHDR(control); cm; cm = M_NXT_CMSGHDR(control, cm)) {
+ for (cm = M_FIRST_CMSGHDR(control); cm != NULL;
+ cm = M_NXT_CMSGHDR(control, cm)) {
int error;
- if (cm->cmsg_len < sizeof(struct cmsghdr) || cm->cmsg_len > control->m_len)
+ if (cm->cmsg_len < sizeof (struct cmsghdr) ||
+ cm->cmsg_len > control->m_len)
return (EINVAL);
if (cm->cmsg_level != IPPROTO_IPV6)
continue;
switch (optname) {
case IPV6_2292PKTINFO:
- case IPV6_PKTINFO:
- {
+ case IPV6_PKTINFO: {
struct ifnet *ifp = NULL;
struct in6_pktinfo *pktinfo;
- if (len != sizeof(struct in6_pktinfo))
+ if (len != sizeof (struct in6_pktinfo))
return (EINVAL);
pktinfo = (struct in6_pktinfo *)(void *)buf;
ifnet_head_done();
return (ENXIO);
}
-
+
if (pktinfo->ipi6_ifindex) {
ifp = ifindex2ifnet[pktinfo->ipi6_ifindex];
if (ifp == NULL) {
return (ENXIO);
}
}
-
+
ifnet_head_done();
/*
* application when it is used as a sticky option.
*/
if (opt->ip6po_pktinfo == NULL) {
- opt->ip6po_pktinfo = _MALLOC(sizeof(*pktinfo),
+ opt->ip6po_pktinfo = _MALLOC(sizeof (*pktinfo),
M_IP6OPT, M_NOWAIT);
if (opt->ip6po_pktinfo == NULL)
return (ENOBUFS);
}
- bcopy(pktinfo, opt->ip6po_pktinfo, sizeof(*pktinfo));
+ bcopy(pktinfo, opt->ip6po_pktinfo, sizeof (*pktinfo));
break;
}
case IPV6_2292HOPLIMIT:
- case IPV6_HOPLIMIT:
- {
+ case IPV6_HOPLIMIT: {
int *hlimp;
/*
if (optname == IPV6_HOPLIMIT && sticky)
return (ENOPROTOOPT);
- if (len != sizeof(int))
+ if (len != sizeof (int))
return (EINVAL);
hlimp = (int *)(void *)buf;
if (*hlimp < -1 || *hlimp > 255)
break;
}
- case IPV6_TCLASS:
- {
+ case IPV6_TCLASS: {
int tclass;
- if (len != sizeof(int))
+ if (len != sizeof (int))
return (EINVAL);
tclass = *(int *)(void *)buf;
if (tclass < -1 || tclass > 255)
}
/* check if cmsg_len is large enough for sa_len */
- if (len < sizeof(struct sockaddr) || len < *buf)
+ if (len < sizeof (struct sockaddr) || len < *buf)
return (EINVAL);
- switch (((struct sockaddr *)buf)->sa_family) {
- case AF_INET6:
- {
- struct sockaddr_in6 *sa6 =
- (struct sockaddr_in6 *)(void *)buf;
+ switch (SA(buf)->sa_family) {
+ case AF_INET6: {
+ struct sockaddr_in6 *sa6 = SIN6(buf);
- if (sa6->sin6_len != sizeof(struct sockaddr_in6))
+ if (sa6->sin6_len != sizeof (struct sockaddr_in6))
return (EINVAL);
if (IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr) ||
break;
case IPV6_2292HOPOPTS:
- case IPV6_HOPOPTS:
- {
+ case IPV6_HOPOPTS: {
struct ip6_hbh *hbh;
int hbhlen;
}
/* message length validation */
- if (len < sizeof(struct ip6_hbh))
+ if (len < sizeof (struct ip6_hbh))
return (EINVAL);
hbh = (struct ip6_hbh *)(void *)buf;
hbhlen = (hbh->ip6h_len + 1) << 3;
case IPV6_2292DSTOPTS:
case IPV6_DSTOPTS:
- case IPV6_RTHDRDSTOPTS:
- {
+ case IPV6_RTHDRDSTOPTS: {
struct ip6_dest *dest, **newdest = NULL;
int destlen;
}
/* message length validation */
- if (len < sizeof(struct ip6_dest))
+ if (len < sizeof (struct ip6_dest))
return (EINVAL);
dest = (struct ip6_dest *)(void *)buf;
destlen = (dest->ip6d_len + 1) << 3;
if (*newdest == NULL)
return (ENOBUFS);
bcopy(dest, *newdest, destlen);
-
break;
}
case IPV6_2292RTHDR:
- case IPV6_RTHDR:
- {
+ case IPV6_RTHDR: {
struct ip6_rthdr *rth;
int rthlen;
}
/* message length validation */
- if (len < sizeof(struct ip6_rthdr))
+ if (len < sizeof (struct ip6_rthdr))
return (EINVAL);
rth = (struct ip6_rthdr *)(void *)buf;
rthlen = (rth->ip6r_len + 1) << 3;
if (opt->ip6po_rthdr == NULL)
return (ENOBUFS);
bcopy(rth, opt->ip6po_rthdr, rthlen);
-
break;
}
case IPV6_USE_MIN_MTU:
- if (len != sizeof(int))
+ if (len != sizeof (int))
return (EINVAL);
minmtupolicy = *(int *)(void *)buf;
if (minmtupolicy != IP6PO_MINMTU_MCASTONLY &&
break;
case IPV6_DONTFRAG:
- if (len != sizeof(int))
+ if (len != sizeof (int))
return (EINVAL);
if (uproto == IPPROTO_TCP || *(int *)(void *)buf == 0) {
* (RFC3542 leaves this case unspecified.)
*/
opt->ip6po_flags &= ~IP6PO_DONTFRAG;
- } else
+ } else {
opt->ip6po_flags |= IP6PO_DONTFRAG;
+ }
break;
case IPV6_PREFER_TEMPADDR:
- if (len != sizeof(int))
+ if (len != sizeof (int))
return (EINVAL);
preftemp = *(int *)(void *)buf;
if (preftemp != IP6PO_TEMPADDR_SYSTEM &&
* pointer that might NOT be &loif -- easier than replicating that code here.
*/
void
-ip6_mloopback(
- struct ifnet *ifp,
- struct mbuf *m,
- struct sockaddr_in6 *dst)
+ip6_mloopback(struct ifnet *srcifp, struct ifnet *origifp, struct mbuf *m,
+ struct sockaddr_in6 *dst, uint32_t optlen, int32_t nxt0)
{
struct mbuf *copym;
struct ip6_hdr *ip6;
+ struct in6_addr src;
- copym = m_copy(m, 0, M_COPYALL);
- if (copym == NULL)
+ if (lo_ifp == NULL)
return;
/*
+ * Copy the packet header as it's needed for the checksum.
* Make sure to deep-copy IPv6 header portion in case the data
* is in an mbuf cluster, so that we can safely override the IPv6
* header portion later.
*/
- if ((copym->m_flags & M_EXT) != 0 ||
- copym->m_len < sizeof(struct ip6_hdr)) {
- copym = m_pullup(copym, sizeof(struct ip6_hdr));
- if (copym == NULL)
- return;
- }
+ copym = m_copym_mode(m, 0, M_COPYALL, M_DONTWAIT, M_COPYM_COPY_HDR);
+ if (copym != NULL && ((copym->m_flags & M_EXT) ||
+ copym->m_len < sizeof (struct ip6_hdr)))
+ copym = m_pullup(copym, sizeof (struct ip6_hdr));
-#if DIAGNOSTIC
- if (copym->m_len < sizeof(*ip6)) {
- m_freem(copym);
+ if (copym == NULL)
return;
- }
-#endif
ip6 = mtod(copym, struct ip6_hdr *);
+ src = ip6->ip6_src;
/*
* clear embedded scope identifiers if necessary.
* in6_clearscope will touch the addresses only when necessary.
in6_clearscope(&ip6->ip6_src);
in6_clearscope(&ip6->ip6_dst);
-#ifdef __APPLE__
+ if (copym->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA)
+ in6_delayed_cksum_offset(copym, 0, optlen, nxt0);
- /* Makes sure the HW checksum flags are cleaned before sending the packet */
+ /*
+ * Stuff the 'real' ifp into the pkthdr, to be used in matching
+ * in ip6_input(); we need the loopback ifp/dl_tag passed as args
+ * to make the loopback driver compliant with the data link
+ * requirements.
+ */
+ copym->m_pkthdr.rcvif = origifp;
- if ((copym->m_pkthdr.csum_flags & CSUM_DELAY_IPV6_DATA) != 0) {
- in6_delayed_cksum(copym, sizeof(struct ip6_hdr));
- copym->m_pkthdr.csum_flags &= ~CSUM_DELAY_IPV6_DATA;
+ /*
+ * Also record the source interface (which owns the source address).
+ * This is basically a stripped down version of ifa_foraddr6().
+ */
+ if (srcifp == NULL) {
+ struct in6_ifaddr *ia;
+
+ lck_rw_lock_shared(&in6_ifaddr_rwlock);
+ for (ia = in6_ifaddrs; ia != NULL; ia = ia->ia_next) {
+ IFA_LOCK_SPIN(&ia->ia_ifa);
+ /* compare against src addr with embedded scope */
+ if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, &src)) {
+ srcifp = ia->ia_ifp;
+ IFA_UNLOCK(&ia->ia_ifa);
+ break;
+ }
+ IFA_UNLOCK(&ia->ia_ifa);
+ }
+ lck_rw_done(&in6_ifaddr_rwlock);
}
- copym->m_pkthdr.rcvif = 0;
- copym->m_pkthdr.csum_data = 0;
- copym->m_pkthdr.csum_flags = 0;
+ if (srcifp != NULL)
+ ip6_setsrcifaddr_info(copym, srcifp->if_index, NULL);
+ ip6_setdstifaddr_info(copym, origifp->if_index, NULL);
- if (lo_ifp) {
- copym->m_pkthdr.rcvif = ifp;
- dlil_output(lo_ifp, PF_INET6, copym, 0,
- (struct sockaddr *)dst, 0, NULL);
- } else
- m_free(copym);
-#else
- (void)if_simloop(ifp, copym, dst->sin6_family, NULL);
-#endif
+ dlil_output(lo_ifp, PF_INET6, copym, NULL, SA(dst), 0, NULL);
}
/*
* Chop IPv6 header off from the payload.
*/
static int
-ip6_splithdr(m, exthdrs)
- struct mbuf *m;
- struct ip6_exthdrs *exthdrs;
+ip6_splithdr(struct mbuf *m, struct ip6_exthdrs *exthdrs)
{
struct mbuf *mh;
struct ip6_hdr *ip6;
ip6 = mtod(m, struct ip6_hdr *);
- if (m->m_len > sizeof(*ip6)) {
+ if (m->m_len > sizeof (*ip6)) {
MGETHDR(mh, M_DONTWAIT, MT_HEADER); /* MAC-OK */
- if (mh == 0) {
+ if (mh == NULL) {
m_freem(m);
- return ENOBUFS;
+ return (ENOBUFS);
}
M_COPY_PKTHDR(mh, m);
- MH_ALIGN(mh, sizeof(*ip6));
+ MH_ALIGN(mh, sizeof (*ip6));
m->m_flags &= ~M_PKTHDR;
- m->m_len -= sizeof(*ip6);
- m->m_data += sizeof(*ip6);
+ m->m_len -= sizeof (*ip6);
+ m->m_data += sizeof (*ip6);
mh->m_next = m;
m = mh;
- m->m_len = sizeof(*ip6);
- bcopy((caddr_t)ip6, mtod(m, caddr_t), sizeof(*ip6));
+ m->m_len = sizeof (*ip6);
+ bcopy((caddr_t)ip6, mtod(m, caddr_t), sizeof (*ip6));
}
exthdrs->ip6e_ip6 = m;
- return 0;
+ return (0);
+}
+
+static void
+ip6_output_checksum(struct ifnet *ifp, uint32_t mtu, struct mbuf *m,
+ int nxt0, uint32_t tlen, uint32_t optlen)
+{
+ uint32_t sw_csum, hwcap = ifp->if_hwassist;
+ int tso = TSO_IPV6_OK(ifp, m);
+
+ if (!hwcksum_tx) {
+ /* do all in software; checksum offload is disabled */
+ sw_csum = CSUM_DELAY_IPV6_DATA & m->m_pkthdr.csum_flags;
+ } else {
+ /* do in software what the hardware cannot */
+ sw_csum = m->m_pkthdr.csum_flags &
+ ~IF_HWASSIST_CSUM_FLAGS(hwcap);
+ }
+
+ if (optlen != 0) {
+ sw_csum |= (CSUM_DELAY_IPV6_DATA &
+ m->m_pkthdr.csum_flags);
+ } else if (!(sw_csum & CSUM_DELAY_IPV6_DATA) &&
+ (hwcap & CSUM_PARTIAL)) {
+ /*
+ * Partial checksum offload, ere), if no extension
+ * headers, and TCP only (no UDP support, as the
+ * hardware may not be able to convert +0 to
+ * -0 (0xffff) per RFC1122 4.1.3.4.)
+ */
+ if (hwcksum_tx && !tso &&
+ (m->m_pkthdr.csum_flags & CSUM_TCPIPV6) &&
+ tlen <= mtu) {
+ uint16_t start = sizeof (struct ip6_hdr);
+ uint16_t ulpoff =
+ m->m_pkthdr.csum_data & 0xffff;
+ m->m_pkthdr.csum_flags |=
+ (CSUM_DATA_VALID | CSUM_PARTIAL);
+ m->m_pkthdr.csum_tx_stuff = (ulpoff + start);
+ m->m_pkthdr.csum_tx_start = start;
+ sw_csum = 0;
+ } else {
+ sw_csum |= (CSUM_DELAY_IPV6_DATA &
+ m->m_pkthdr.csum_flags);
+ }
+ }
+
+ if (sw_csum & CSUM_DELAY_IPV6_DATA) {
+ in6_delayed_cksum_offset(m, 0, optlen, nxt0);
+ sw_csum &= ~CSUM_DELAY_IPV6_DATA;
+ }
+
+ if (hwcksum_tx) {
+ /*
+ * Drop off bits that aren't supported by hardware;
+ * also make sure to preserve non-checksum related bits.
+ */
+ m->m_pkthdr.csum_flags =
+ ((m->m_pkthdr.csum_flags &
+ (IF_HWASSIST_CSUM_FLAGS(hwcap) | CSUM_DATA_VALID)) |
+ (m->m_pkthdr.csum_flags & ~IF_HWASSIST_CSUM_MASK));
+ } else {
+ /* drop all bits; checksum offload is disabled */
+ m->m_pkthdr.csum_flags = 0;
+ }
}
/*
* Compute IPv6 extension header length.
*/
int
-ip6_optlen(in6p)
- struct in6pcb *in6p;
+ip6_optlen(struct in6pcb *in6p)
{
int len;
if (!in6p->in6p_outputopts)
- return 0;
+ return (0);
len = 0;
-#define elen(x) \
- (((struct ip6_ext *)(x)) ? (((struct ip6_ext *)(x))->ip6e_len + 1) << 3 : 0)
+#define elen(x) \
+ (((struct ip6_ext *)(x)) ? \
+ (((struct ip6_ext *)(x))->ip6e_len + 1) << 3 : 0)
len += elen(in6p->in6p_outputopts->ip6po_hbh);
- if (in6p->in6p_outputopts->ip6po_rthdr)
+ if (in6p->in6p_outputopts->ip6po_rthdr) {
/* dest1 is valid with rthdr only */
len += elen(in6p->in6p_outputopts->ip6po_dest1);
+ }
len += elen(in6p->in6p_outputopts->ip6po_rthdr);
len += elen(in6p->in6p_outputopts->ip6po_dest2);
- return len;
+ return (len);
#undef elen
}
+
+static int
+sysctl_reset_ip6_output_stats SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int error, i;
+
+ i = ip6_output_measure;
+ error = sysctl_handle_int(oidp, &i, 0, req);
+ if (error || req->newptr == USER_ADDR_NULL)
+ goto done;
+ /* impose bounds */
+ if (i < 0 || i > 1) {
+ error = EINVAL;
+ goto done;
+ }
+ if (ip6_output_measure != i && i == 1) {
+ net_perf_initialize(&net_perf, ip6_output_measure_bins);
+ }
+ ip6_output_measure = i;
+done:
+ return (error);
+}
+
+static int
+sysctl_ip6_output_measure_bins SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int error;
+ uint64_t i;
+
+ i = ip6_output_measure_bins;
+ error = sysctl_handle_quad(oidp, &i, 0, req);
+ if (error || req->newptr == USER_ADDR_NULL)
+ goto done;
+ /* validate data */
+ if (!net_perf_validate_bins(i)) {
+ error = EINVAL;
+ goto done;
+ }
+ ip6_output_measure_bins = i;
+done:
+ return (error);
+}
+
+static int
+sysctl_ip6_output_getperf SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+ if (req->oldptr == USER_ADDR_NULL)
+ req->oldlen = (size_t)sizeof (struct ipstat);
+
+ return (SYSCTL_OUT(req, &net_perf, MIN(sizeof (net_perf), req->oldlen)));
+}
+
projects / apple / xnu.git / blobdiff