/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * @APPLE_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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
+ * 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,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (C) 1999 WIDE Project.
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
-#if INET6
#include <netinet/ip6.h>
-#endif
#include <netinet/ip_ecn.h>
-#if INET6
#include <netinet6/ip6_ecn.h>
-#endif
/*
* modify outer ECN (TOS) field on ingress operation (tunnel encapsulation).
*/
void
-ip_ecn_ingress(mode, outer, inner)
- int mode;
- u_int8_t *outer;
- const u_int8_t *inner;
+ip_ecn_ingress(int mode, u_int8_t *outer, const u_int8_t *inner)
{
- if (!outer || !inner)
+ if (!outer || !inner) {
panic("NULL pointer passed to ip_ecn_ingress");
+ }
*outer = *inner;
switch (mode) {
- case ECN_ALLOWED: /* ECN allowed */
- *outer &= ~IPTOS_CE;
+ case ECN_NORMAL: /* ECN normal mode, copy flags */
break;
- case ECN_FORBIDDEN: /* ECN forbidden */
- *outer &= ~(IPTOS_ECT | IPTOS_CE);
+ case ECN_COMPATIBILITY: /* ECN compatibility mode */
+ *outer &= ~IPTOS_ECN_MASK;
break;
- case ECN_NOCARE: /* no consideration to ECN */
+ case ECN_NOCARE: /* no consideration to ECN */
break;
}
}
/*
* modify inner ECN (TOS) field on egress operation (tunnel decapsulation).
*/
-void
-ip_ecn_egress(mode, outer, inner)
- int mode;
- const u_int8_t *outer;
- u_int8_t *inner;
+int
+ip_ecn_egress(int mode, const u_int8_t *outer, u_int8_t *inner)
{
- if (!outer || !inner)
+ if (!outer || !inner) {
panic("NULL pointer passed to ip_ecn_egress");
+ }
switch (mode) {
- case ECN_ALLOWED:
- if (*outer & IPTOS_CE)
- *inner |= IPTOS_CE;
+ /* Process ECN for both normal and compatibility modes */
+ case ECN_NORMAL:
+ case ECN_COMPATIBILITY:
+ if (((*outer & IPTOS_ECN_MASK) == IPTOS_ECN_CE) &&
+ ((*inner & IPTOS_ECN_MASK) != IPTOS_ECN_NOTECT)) {
+ *inner |= IPTOS_ECN_CE;
+ } else if ((*outer & IPTOS_ECN_MASK) == IPTOS_ECN_ECT1 &&
+ (*inner & IPTOS_ECN_MASK) == IPTOS_ECN_ECT0) {
+ *inner = *outer;
+ }
break;
- case ECN_FORBIDDEN: /* ECN forbidden */
- case ECN_NOCARE: /* no consideration to ECN */
+ case ECN_NOCARE: /* no consideration to ECN */
break;
}
+ return 1;
}
-#if INET6
void
-ip6_ecn_ingress(mode, outer, inner)
- int mode;
- u_int32_t *outer;
- const u_int32_t *inner;
+ip6_ecn_ingress(int mode, u_int32_t *outer, const u_int32_t *inner)
{
u_int8_t outer8, inner8;
- if (!outer || !inner)
+ if (!outer || !inner) {
panic("NULL pointer passed to ip6_ecn_ingress");
+ }
inner8 = (ntohl(*inner) >> 20) & 0xff;
ip_ecn_ingress(mode, &outer8, &inner8);
*outer |= htonl((u_int32_t)outer8 << 20);
}
-void
-ip6_ecn_egress(mode, outer, inner)
- int mode;
- const u_int32_t *outer;
- u_int32_t *inner;
+int
+ip6_ecn_egress(int mode, const u_int32_t *outer, u_int32_t *inner)
{
u_int8_t outer8, inner8;
- if (!outer || !inner)
+ if (!outer || !inner) {
panic("NULL pointer passed to ip6_ecn_egress");
+ }
outer8 = (ntohl(*outer) >> 20) & 0xff;
- ip_ecn_egress(mode, &outer8, &inner8);
+ inner8 = (ntohl(*inner) >> 20) & 0xff;
+ if (ip_ecn_egress(mode, &outer8, &inner8) == 0) {
+ return 0;
+ }
+ *inner &= ~htonl(0xff << 20);
+ *inner |= htonl((u_int32_t)inner8 << 20);
+ return 1;
+}
+
+/*
+ * Modify outer IPv6 ECN (Traffic Class) field according to inner IPv4 TOS field
+ * on ingress operation (tunnel encapsulation).
+ */
+void
+ip46_ecn_ingress(int mode, u_int32_t *outer, const u_int8_t *tos)
+{
+ u_int8_t outer8;
+
+ if (!outer || !tos) {
+ panic("NULL pointer passed to ip46_ecn_ingress");
+ }
+
+ ip_ecn_ingress(mode, &outer8, tos);
+ *outer &= ~htonl(0xff << 20);
+ *outer |= htonl((u_int32_t)outer8 << 20);
+}
+
+/*
+ * Modify inner IPv4 ECN (TOS) field according to output IPv6 ECN (Traffic Class)
+ * on egress operation (tunnel decapsulation).
+ */
+int
+ip46_ecn_egress(int mode, const u_int32_t *outer, u_int8_t *tos)
+{
+ u_int8_t outer8;
+
+ if (!outer || !tos) {
+ panic("NULL pointer passed to ip46_ecn_egress");
+ }
+
+ outer8 = (ntohl(*outer) >> 20) & 0xff;
+ return ip_ecn_egress(mode, &outer8, tos);
+}
+
+/*
+ * Modify outer IPv4 TOS field according to inner IPv6 ECN (Traffic Class)
+ * on ingress operation (tunnel encapsulation).
+ */
+void
+ip64_ecn_ingress(int mode, u_int8_t *outer, const u_int32_t *inner)
+{
+ u_int8_t inner8;
+
+ if (!outer || !inner) {
+ panic("NULL pointer passed to ip64_ecn_ingress");
+ }
+
+ inner8 = (ntohl(*inner) >> 20) & 0xff;
+ ip_ecn_ingress(mode, outer, &inner8);
+}
+
+/*
+ * Modify inner IPv6 ECN (Traffic Class) according to outer IPv4 TOS field
+ * on egress operation (tunnel decapsulation).
+ */
+int
+ip64_ecn_egress(int mode, const u_int8_t *outer, u_int32_t *inner)
+{
+ u_int8_t inner8;
+
+ if (!outer || !inner) {
+ panic("NULL pointer passed to ip64_ecn_egress");
+ }
+
+ inner8 = (ntohl(*inner) >> 20) & 0xff;
+ if (ip_ecn_egress(mode, outer, &inner8) == 0) {
+ return 0;
+ }
+
*inner &= ~htonl(0xff << 20);
*inner |= htonl((u_int32_t)inner8 << 20);
+ return 1;
}
-#endif
projects / apple / xnu.git / blobdiff