[HICN-708] Rebase with master

Signed-off-by: Enrico Loparco (eloparco) <eloparco@cisco.com>
Change-Id: I2122e1d61dd3b2e039972624ffbdbcb3c5610159

1 files changed, 51 insertions, 0 deletions

diff --git a/apps/http-proxy/includes/hicn/http-proxy/utils.h b/apps/http-proxy/includes/hicn/http-proxy/utils.h
new file mode 100644
index 000000000..d87c796d0
--- /dev/null
+++ b/apps/http-proxy/includes/hicn/http-proxy/utils.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2020 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.
+ */
+
+#include <hicn/transport/core/prefix.h>
+#include <hicn/transport/utils/hash.h>
+
+#include <sstream>
+#include <string>
+
+#pragma once
+
+TRANSPORT_ALWAYS_INLINE std::string generatePrefix(
+    const std::string& prefix_url, const std::string& first_ipv6_word) {
+  const char* str = prefix_url.c_str();
+  uint16_t pos = 0;
+
+  if (strncmp("http://", str, 7) == 0) {
+    pos = 7;
+  } else if (strncmp("https://", str, 8) == 0) {
+    pos = 8;
+  }
+
+  str += pos;
+
+  uint32_t locator_hash = utils::hash::fnv32_buf(str, strlen(str));
+
+  std::stringstream stream;
+  stream << first_ipv6_word << ":0";
+
+  for (uint16_t* word = (uint16_t*)&locator_hash;
+       std::size_t(word) < (std::size_t(&locator_hash) + sizeof(locator_hash));
+       word++) {
+    stream << ":" << std::hex << *word;
+  }
+
+  stream << "::";
+
+  return stream.str();
+}
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