-/* $KAME: dest6.c,v 1.10 2000/02/28 16:18:11 itojun Exp $ */
+/*
+ * Copyright (c) 2020 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
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, 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/dest6.c,v 1.1.2.3 2001/07/03 11:01:49 ume Exp $ */
+/* $KAME: dest6.c,v 1.27 2001/03/29 05:34:30 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
#include <netinet/in_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
-#if !(defined(__APPLE__))
-#include <netinet6/in6_pcb.h>
-#endif
#include <netinet/icmp6.h>
-#if MIP6
-int (*mip6_store_dstopt_pre_hook)(struct mbuf *m, u_int8_t *opt,
- u_int8_t off, u_int8_t dstlen) = NULL;
-int (*mip6_rec_ctrl_sig_hook)(struct mbuf *m, int off) = NULL;
-#endif /* MIP6 */
-
/*
* Destination options header processing.
*/
int
-dest6_input(mp, offp, proto)
- struct mbuf **mp;
- int *offp, proto;
+dest6_input(struct mbuf **mp, int *offp, int proto)
{
- register struct mbuf *m = *mp;
- int off = *offp, dstoptlen, optlen;
- struct ip6_dest *dstopts;
- u_int8_t *opt;
+#pragma unused(proto)
+ struct mbuf *m = *mp;
+ int off = *offp, dstoptlen = 0, optlen = 0;
+ struct ip6_dest *dstopts = NULL;
+ u_int8_t *opt = NULL;
/* validation of the length of the header */
-#ifndef PULLDOWN_TEST
- IP6_EXTHDR_CHECK(m, off, sizeof(*dstopts), IPPROTO_DONE);
+ IP6_EXTHDR_CHECK(m, off, sizeof(*dstopts), return IPPROTO_DONE);
dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
-#else
- IP6_EXTHDR_GET(dstopts, struct ip6_dest *, m, off, sizeof(*dstopts));
- if (dstopts == NULL)
- return IPPROTO_DONE;
-#endif
dstoptlen = (dstopts->ip6d_len + 1) << 3;
-#ifndef PULLDOWN_TEST
- IP6_EXTHDR_CHECK(m, off, dstoptlen, IPPROTO_DONE);
+ IP6_EXTHDR_CHECK(m, off, dstoptlen, return IPPROTO_DONE);
dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
-#else
- IP6_EXTHDR_GET(dstopts, struct ip6_dest *, m, off, dstoptlen);
- if (dstopts == NULL)
- return IPPROTO_DONE;
-#endif
off += dstoptlen;
dstoptlen -= sizeof(struct ip6_dest);
opt = (u_int8_t *)dstopts + sizeof(struct ip6_dest);
/* search header for all options. */
for (optlen = 0; dstoptlen > 0; dstoptlen -= optlen, opt += optlen) {
- switch(*opt) {
- case IP6OPT_PAD1:
- optlen = 1;
- break;
- case IP6OPT_PADN:
- if (dstoptlen < IP6OPT_MINLEN) {
- ip6stat.ip6s_toosmall++;
- goto bad;
- }
- optlen = *(opt + 1) + 2;
- break;
+ if (*opt != IP6OPT_PAD1 &&
+ (dstoptlen < IP6OPT_MINLEN || *(opt + 1) + 2 > dstoptlen)) {
+ ip6stat.ip6s_toosmall++;
+ goto bad;
+ }
-#if MIP6
- case IP6OPT_BINDING_UPDATE:
- case IP6OPT_BINDING_ACK:
- case IP6OPT_BINDING_REQ:
- case IP6OPT_HOME_ADDRESS:
- if (mip6_store_dstopt_pre_hook) {
- if ((*mip6_store_dstopt_pre_hook)(m, opt, off, dstoptlen) != 0)
- goto bad;
- }
+ switch (*opt) {
+ case IP6OPT_PAD1:
+ optlen = 1;
+ break;
+ case IP6OPT_PADN:
optlen = *(opt + 1) + 2;
break;
-#endif /* MIP6 */
- default: /* unknown option */
- if (dstoptlen < IP6OPT_MINLEN) {
- ip6stat.ip6s_toosmall++;
- goto bad;
- }
- if ((optlen = ip6_unknown_opt(opt, m,
- opt-mtod(m, u_int8_t *))) == -1)
- return(IPPROTO_DONE);
- optlen += 2;
- break;
+ default: /* unknown option */
+ optlen = ip6_unknown_opt(opt, m,
+ opt - mtod(m, u_int8_t *));
+ if (optlen == -1) {
+ return IPPROTO_DONE;
+ }
+ optlen += 2;
+ break;
}
}
-
-#if MIP6
- if (mip6_rec_ctrl_sig_hook) {
- /*
- * All Destinations options have been processed. Call MIPv6 to
- * process stored options.
- */
- if ((*mip6_rec_ctrl_sig_hook)(m, *offp) != 0)
- return(IPPROTO_DONE);
- }
-#endif /* MIP6 */
-
+ *mp = m;
*offp = off;
- return(dstopts->ip6d_nxt);
+ return dstopts->ip6d_nxt;
- bad:
+bad:
+ *mp = NULL;
m_freem(m);
- return(IPPROTO_DONE);
+ return IPPROTO_DONE;
}
projects / apple / xnu.git / blobdiff