1 files changed, 102 insertions, 0 deletions
diff --git a/hicn-plugin/src/parser.h b/hicn-plugin/src/parser.h
new file mode 100755
index 000000000..cbc5696ba
--- /dev/null
+++ b/hicn-plugin/src/parser.h
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2017-2019 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.
+ */
+
+#ifndef __HICN_PARSER_H__
+#define __HICN_PARSER_H__
+
+#include <vlib/vlib.h>
+
+#include "hicn.h"
+#include "error.h"
+
+
+/*
+ * Key type codes for header, header tlvs, body tlvs, and child tlvs
+ */
+
+// FIXME(reuse lib struct, no more control ?)
+enum hicn_pkt_type_e
+{
+  HICN_PKT_TYPE_INTEREST = 0,
+  HICN_PKT_TYPE_CONTENT = 1,
+};
+
+always_inline int
+hicn_interest_parse_pkt (vlib_buffer_t * pkt, hicn_name_t * name,
+			 u16 * namelen, hicn_header_t ** pkt_hdrp, u8 * isv6)
+{
+  if (pkt == NULL)
+    return HICN_ERROR_PARSER_PKT_INVAL;
+  hicn_header_t *pkt_hdr = vlib_buffer_get_current (pkt);
+  *pkt_hdrp = pkt_hdr;
+  u8 *ip_pkt = vlib_buffer_get_current (pkt);
+  u8 version = (pkt_hdr->v4.ip.version_ihl & 0xf0) >> 4;
+  *isv6 = ((version & 2) >> 1);
+  u8 ip_proto = (*isv6) * IPPROTO_IPV6;
+  u8 next_proto_offset = 6 + (1 - *isv6) * 3;
+  //in the ipv6 header the next header field is at byte 6
+  // in the ipv4 header the protocol field is at byte 9
+  hicn_type_t type = (hicn_type_t) { {
+				      .l4 = IPPROTO_NONE,.l3 =
+				      IPPROTO_NONE,.l2 =
+				      ip_pkt[next_proto_offset],.l1 =
+				      ip_proto}
+  };
+  hicn_get_buffer (pkt)->type = type;
+
+  hicn_ops_vft[type.l1]->get_interest_name (type, &pkt_hdr->protocol, name);
+  *namelen = (1 - (*isv6)) * HICN_V4_NAME_LEN + (*isv6) * HICN_V6_NAME_LEN;
+
+  return HICN_ERROR_NONE;
+}
+
+always_inline int
+hicn_data_parse_pkt (vlib_buffer_t * pkt, hicn_name_t * name,
+		     u16 * namelen, hicn_header_t ** pkt_hdrp, u8 * isv6)
+{
+  if (pkt == NULL)
+    return HICN_ERROR_PARSER_PKT_INVAL;
+  hicn_header_t *pkt_hdr = vlib_buffer_get_current (pkt);
+  *pkt_hdrp = pkt_hdr;
+  *pkt_hdrp = pkt_hdr;
+  u8 *ip_pkt = vlib_buffer_get_current (pkt);
+  u8 version = (pkt_hdr->v4.ip.version_ihl & 0xf0) >> 4;
+  *isv6 = ((version & 2) >> 1);
+  u8 ip_proto = (*isv6) * IPPROTO_IPV6;
+  /*
+   * in the ipv6 header the next header field is at byte 6 in the ipv4
+   * header the protocol field is at byte 9
+   */
+  u8 next_proto_offset = 6 + (1 - *isv6) * 3;
+  hicn_type_t type = (hicn_type_t) { {.l4 = IPPROTO_NONE,.l3 =
+				      IPPROTO_NONE,.l2 =
+				      ip_pkt[next_proto_offset],.l1 =
+				      ip_proto}
+  };
+  hicn_get_buffer (pkt)->type = type;
+  hicn_ops_vft[type.l1]->get_data_name (type, &pkt_hdr->protocol, name);
+  *namelen = (1 - (*isv6)) * HICN_V4_NAME_LEN + (*isv6) * HICN_V6_NAME_LEN;
+
+  return HICN_ERROR_NONE;
+}
+
+
+#endif /* // __HICN_PARSER_H__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */