--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * ip/ip6_input.c: IP v6 input node
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef included_ip6_input_h
+#define included_ip6_input_h
+
+#include <vnet/ip/ip.h>
+
+extern char *ip6_error_strings[];
+
+typedef enum
+{
+ IP6_INPUT_NEXT_DROP,
+ IP6_INPUT_NEXT_LOOKUP,
+ IP6_INPUT_NEXT_LOOKUP_MULTICAST,
+ IP6_INPUT_NEXT_ICMP_ERROR,
+ IP6_INPUT_N_NEXT,
+} ip6_input_next_t;
+
+always_inline void
+ip6_input_check_x2 (vlib_main_t * vm,
+ vlib_node_runtime_t * error_node,
+ vlib_buffer_t * p0, vlib_buffer_t * p1,
+ ip6_header_t * ip0, ip6_header_t * ip1,
+ u32 * next0, u32 * next1)
+{
+ u8 error0, error1;
+
+ error0 = error1 = IP6_ERROR_NONE;
+
+ /* Version != 6? Drop it. */
+ error0 =
+ (clib_net_to_host_u32
+ (ip0->ip_version_traffic_class_and_flow_label) >> 28) !=
+ 6 ? IP6_ERROR_VERSION : error0;
+ error1 =
+ (clib_net_to_host_u32
+ (ip1->ip_version_traffic_class_and_flow_label) >> 28) !=
+ 6 ? IP6_ERROR_VERSION : error1;
+
+ /* hop limit < 1? Drop it. for link-local broadcast packets,
+ * like dhcpv6 packets from client has hop-limit 1, which should not
+ * be dropped.
+ */
+ error0 = ip0->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error0;
+ error1 = ip1->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error1;
+
+ /* L2 length must be at least minimal IP header. */
+ error0 =
+ p0->current_length < sizeof (ip0[0]) ? IP6_ERROR_TOO_SHORT : error0;
+ error1 =
+ p1->current_length < sizeof (ip1[0]) ? IP6_ERROR_TOO_SHORT : error1;
+
+ if (PREDICT_FALSE (error0 != IP6_ERROR_NONE))
+ {
+ if (error0 == IP6_ERROR_TIME_EXPIRED)
+ {
+ icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
+ ICMP6_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ *next0 = IP6_INPUT_NEXT_ICMP_ERROR;
+ }
+ else
+ {
+ *next0 = IP6_INPUT_NEXT_DROP;
+ }
+ }
+ if (PREDICT_FALSE (error1 != IP6_ERROR_NONE))
+ {
+ if (error1 == IP6_ERROR_TIME_EXPIRED)
+ {
+ icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
+ ICMP6_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ *next1 = IP6_INPUT_NEXT_ICMP_ERROR;
+ }
+ else
+ {
+ *next1 = IP6_INPUT_NEXT_DROP;
+ }
+ }
+}
+
+always_inline void
+ip6_input_check_x1 (vlib_main_t * vm,
+ vlib_node_runtime_t * error_node,
+ vlib_buffer_t * p0, ip6_header_t * ip0, u32 * next0)
+{
+ u8 error0;
+
+ error0 = IP6_ERROR_NONE;
+
+ /* Version != 6? Drop it. */
+ error0 =
+ (clib_net_to_host_u32
+ (ip0->ip_version_traffic_class_and_flow_label) >> 28) !=
+ 6 ? IP6_ERROR_VERSION : error0;
+
+ /* hop limit < 1? Drop it. for link-local broadcast packets,
+ * like dhcpv6 packets from client has hop-limit 1, which should not
+ * be dropped.
+ */
+ error0 = ip0->hop_limit < 1 ? IP6_ERROR_TIME_EXPIRED : error0;
+
+ /* L2 length must be at least minimal IP header. */
+ error0 =
+ p0->current_length < sizeof (ip0[0]) ? IP6_ERROR_TOO_SHORT : error0;
+
+ if (PREDICT_FALSE (error0 != IP6_ERROR_NONE))
+ {
+ if (error0 == IP6_ERROR_TIME_EXPIRED)
+ {
+ icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
+ ICMP6_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ *next0 = IP6_INPUT_NEXT_ICMP_ERROR;
+ }
+ else
+ {
+ *next0 = IP6_INPUT_NEXT_DROP;
+ }
+ }
+}
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff