From d18ae43123fcd7604d1c36a1ec8450dbe6071824 Mon Sep 17 00:00:00 2001
From: Luca Muscariello <lumuscar+fdio@cisco.com>
Date: Thu, 23 Feb 2017 20:44:26 +0100
Subject: Initial commit: ccnxlibs.

Change-Id: I1b376527a7dd01a6b9e083a6cb646955902f45c0
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>
---
 .../codec/schema_v1/ccnxCodecSchemaV1_LinkCodec.c  | 165 +++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100755 libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_LinkCodec.c

(limited to 'libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_LinkCodec.c')

diff --git a/libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_LinkCodec.c b/libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_LinkCodec.c
new file mode 100755
index 00000000..cc78c28e
--- /dev/null
+++ b/libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_LinkCodec.c
@@ -0,0 +1,165 @@
+/*
+ * 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.
+ */
+
+/**
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <LongBow/runtime.h>
+
+#include <parc/algol/parc_Memory.h>
+#include <parc/algol/parc_Buffer.h>
+
+#include <ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_Types.h>
+#include <ccnx/common/codec/ccnxCodec_TlvUtilities.h>
+
+#include <ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_NameCodec.h>
+#include <ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_LinkCodec.h>
+
+ssize_t
+ccnxCodecSchemaV1LinkCodec_Encode(CCNxCodecTlvEncoder *encoder, const CCNxLink *link)
+{
+    ssize_t length = 0;
+
+    const CCNxName *name = ccnxLink_GetName(link);
+    if (name) {
+        length += ccnxCodecSchemaV1NameCodec_Encode(encoder, CCNxCodecSchemaV1Types_Link_Name, name);
+
+        PARCBuffer *keyid = ccnxLink_GetKeyID(link);
+        if (keyid) {
+            length += ccnxCodecTlvEncoder_AppendBuffer(encoder, CCNxCodecSchemaV1Types_Link_KeyIdRestriction, keyid);
+        }
+
+        PARCBuffer *hash = ccnxLink_GetContentObjectHash(link);
+        if (hash) {
+            length += ccnxCodecTlvEncoder_AppendBuffer(encoder, CCNxCodecSchemaV1Types_Link_ContentObjectHashRestriction, hash);
+        }
+    } else {
+        length = -1;
+        CCNxCodecError *error = ccnxCodecError_Create(TLV_MISSING_MANDATORY, __func__, __LINE__, ccnxCodecTlvEncoder_Position(encoder));
+        ccnxCodecTlvEncoder_SetError(encoder, error);
+        ccnxCodecError_Release(&error);
+    }
+
+    return length;
+}
+
+typedef struct decoded_link {
+    CCNxName *linkName;
+    PARCBuffer *linkKeyId;
+    PARCBuffer *linkHash;
+} _DecodedLink;
+
+static int
+_decodeField(CCNxCodecTlvDecoder *decoder, _DecodedLink *decodedLink)
+{
+    int errorCode = TLV_ERR_NO_ERROR;
+
+    uint16_t type = ccnxCodecTlvDecoder_GetType(decoder);
+    uint16_t length = ccnxCodecTlvDecoder_GetLength(decoder);
+
+    if (ccnxCodecTlvDecoder_EnsureRemaining(decoder, length)) {
+        switch (type) {
+            case CCNxCodecSchemaV1Types_Link_Name:
+                if (decodedLink->linkName == NULL) {
+                    decodedLink->linkName = ccnxCodecSchemaV1NameCodec_DecodeValue(decoder, length);
+                } else {
+                    errorCode = TLV_ERR_DUPLICATE_FIELD;
+                }
+                break;
+
+            case CCNxCodecSchemaV1Types_Link_KeyIdRestriction:
+                if (decodedLink->linkKeyId == NULL) {
+                    decodedLink->linkKeyId = ccnxCodecTlvDecoder_GetValue(decoder, length);
+                } else {
+                    errorCode = TLV_ERR_DUPLICATE_FIELD;
+                }
+                break;
+
+            case CCNxCodecSchemaV1Types_Link_ContentObjectHashRestriction:
+                if (decodedLink->linkHash == NULL) {
+                    decodedLink->linkHash = ccnxCodecTlvDecoder_GetValue(decoder, length);
+                } else {
+                    errorCode = TLV_ERR_DUPLICATE_FIELD;
+                }
+                break;
+
+            default:
+                // we do not support unknown TLVs
+                errorCode = TLV_ERR_DECODE;
+                break;
+        }
+    } else {
+        errorCode = TLV_ERR_TOO_LONG;
+    }
+
+    return errorCode;
+}
+
+static void
+_decodecLinkCleanup(_DecodedLink *decodedLink)
+{
+    if (decodedLink->linkName) {
+        ccnxName_Release(&decodedLink->linkName);
+    }
+
+    if (decodedLink->linkKeyId) {
+        parcBuffer_Release(&decodedLink->linkKeyId);
+    }
+
+    if (decodedLink->linkHash) {
+        parcBuffer_Release(&decodedLink->linkHash);
+    }
+}
+
+CCNxLink *
+ccnxCodecSchemaV1LinkCodec_DecodeValue(CCNxCodecTlvDecoder *decoder, uint16_t linkLength)
+{
+    int errorCode = TLV_ERR_NO_ERROR;
+
+    CCNxLink *link = NULL;
+
+    _DecodedLink decodedLink;
+    memset(&decodedLink, 0, sizeof(_DecodedLink));
+
+    if (ccnxCodecTlvDecoder_EnsureRemaining(decoder, linkLength)) {
+        while (errorCode == TLV_ERR_NO_ERROR && ccnxCodecTlvDecoder_EnsureRemaining(decoder, 4)) {
+            errorCode = _decodeField(decoder, &decodedLink);
+        }
+    } else {
+        errorCode = TLV_ERR_TOO_LONG;
+    }
+
+    if (errorCode == TLV_ERR_NO_ERROR && decodedLink.linkName == NULL) {
+        errorCode = TLV_ERR_DECODE;
+    }
+
+    if (errorCode != TLV_ERR_NO_ERROR) {
+        CCNxCodecError *error = ccnxCodecError_Create(errorCode, __func__, __LINE__, ccnxCodecTlvDecoder_Position(decoder));
+        ccnxCodecTlvDecoder_SetError(decoder, error);
+        ccnxCodecError_Release(&error);
+    } else {
+        link = ccnxLink_Create(decodedLink.linkName, decodedLink.linkKeyId, decodedLink.linkHash);
+    }
+
+    // cleanup any partial memory allocations
+    _decodecLinkCleanup(&decodedLink);
+
+    return link;
+}
-- 
cgit 1.2.3-korg