Diff: core/uri.c

Revision:

0:1fa43ab66921

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/uri.c	Wed Apr 19 11:30:02 2017 +0000
@@ -0,0 +1,329 @@
+/*******************************************************************************
+ *
+ * Copyright (c) 2013, 2014 Intel Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and Eclipse Distribution License v1.0 which accompany this distribution.
+ *
+ * The Eclipse Public License is available at
+ *    http://www.eclipse.org/legal/epl-v10.html
+ * The Eclipse Distribution License is available at
+ *    http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * Contributors:
+ *    David Navarro, Intel Corporation - initial API and implementation
+ *    Fabien Fleutot - Please refer to git log
+ *    Toby Jaffey - Please refer to git log
+ *    Bosch Software Innovations GmbH - Please refer to git log
+ *    Pascal Rieux - Please refer to git log
+ *    
+ *******************************************************************************/
+
+/*
+ Copyright (c) 2013, 2014 Intel Corporation
+
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+
+     * Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+     * Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+     * Neither the name of Intel Corporation nor the names of its contributors
+       may be used to endorse or promote products derived from this software
+       without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ THE POSSIBILITY OF SUCH DAMAGE.
+
+ David Navarro <david.navarro@intel.com>
+
+*/
+
+#include "internals.h"
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+
+static int prv_parseNumber(uint8_t * uriString,
+                            size_t uriLength,
+                            size_t * headP)
+{
+    int result = 0;
+
+    if (uriString[*headP] == '/')
+    {
+        // empty Object Instance ID with resource ID is not allowed
+        return -1;
+    }
+    while (*headP < uriLength && uriString[*headP] != '/')
+    {
+        if ('0' <= uriString[*headP] && uriString[*headP] <= '9')
+        {
+            result += uriString[*headP] - '0';
+            result *= 10;
+        }
+        else
+        {
+            return -1;
+        }
+        *headP += 1;
+    }
+
+    result /= 10;
+    return result;
+}
+
+
+int uri_getNumber(uint8_t * uriString,
+                   size_t uriLength)
+{
+    size_t index = 0;
+
+    return prv_parseNumber(uriString, uriLength, &index);
+}
+
+
+lwm2m_uri_t * uri_decode(char * altPath,
+                         multi_option_t *uriPath)
+{
+    lwm2m_uri_t * uriP;
+    int readNum;
+
+    LOG_ARG("altPath: \"%s\"", altPath);
+
+    uriP = (lwm2m_uri_t *)lwm2m_malloc(sizeof(lwm2m_uri_t));
+    if (NULL == uriP) return NULL;
+
+    memset(uriP, 0, sizeof(lwm2m_uri_t));
+
+    // Read object ID
+    if (NULL != uriPath
+     && URI_REGISTRATION_SEGMENT_LEN == uriPath->len
+     && 0 == strncmp(URI_REGISTRATION_SEGMENT, (char *)uriPath->data, uriPath->len))
+    {
+        uriP->flag |= LWM2M_URI_FLAG_REGISTRATION;
+        uriPath = uriPath->next;
+        if (uriPath == NULL) return uriP;
+    }
+    else if (NULL != uriPath
+     && URI_BOOTSTRAP_SEGMENT_LEN == uriPath->len
+     && 0 == strncmp(URI_BOOTSTRAP_SEGMENT, (char *)uriPath->data, uriPath->len))
+    {
+        uriP->flag |= LWM2M_URI_FLAG_BOOTSTRAP;
+        uriPath = uriPath->next;
+        if (uriPath != NULL) goto error;
+        return uriP;
+    }
+
+    if ((uriP->flag & LWM2M_URI_MASK_TYPE) != LWM2M_URI_FLAG_REGISTRATION)
+    {
+        // Read altPath if any
+        if (altPath != NULL)
+        {
+            int i;
+            if (NULL == uriPath)
+            {
+                lwm2m_free(uriP);
+                return NULL;
+            }
+            for (i = 0 ; i < uriPath->len ; i++)
+            {
+                if (uriPath->data[i] != altPath[i+1])
+                {
+                    lwm2m_free(uriP);
+                    return NULL;
+                }
+            }
+            uriPath = uriPath->next;
+        }
+        if (NULL == uriPath || uriPath->len == 0)
+        {
+            uriP->flag |= LWM2M_URI_FLAG_DELETE_ALL;
+            return uriP;
+        }
+    }
+
+    readNum = uri_getNumber(uriPath->data, uriPath->len);
+    if (readNum < 0 || readNum > LWM2M_MAX_ID) goto error;
+    uriP->objectId = (uint16_t)readNum;
+    uriP->flag |= LWM2M_URI_FLAG_OBJECT_ID;
+    uriPath = uriPath->next;
+
+    if ((uriP->flag & LWM2M_URI_MASK_TYPE) == LWM2M_URI_FLAG_REGISTRATION)
+    {
+        if (uriPath != NULL) goto error;
+        return uriP;
+    }
+    uriP->flag |= LWM2M_URI_FLAG_DM;
+
+    if (uriPath == NULL) return uriP;
+
+    // Read object instance
+    if (uriPath->len != 0)
+    {
+        readNum = uri_getNumber(uriPath->data, uriPath->len);
+        if (readNum < 0 || readNum >= LWM2M_MAX_ID) goto error;
+        uriP->instanceId = (uint16_t)readNum;
+        uriP->flag |= LWM2M_URI_FLAG_INSTANCE_ID;
+    }
+    uriPath = uriPath->next;
+
+    if (uriPath == NULL) return uriP;
+
+    // Read resource ID
+    if (uriPath->len != 0)
+    {
+        // resource ID without an instance ID is not allowed
+        if ((uriP->flag & LWM2M_URI_FLAG_INSTANCE_ID) == 0) goto error;
+
+        readNum = uri_getNumber(uriPath->data, uriPath->len);
+        if (readNum < 0 || readNum > LWM2M_MAX_ID) goto error;
+        uriP->resourceId = (uint16_t)readNum;
+        uriP->flag |= LWM2M_URI_FLAG_RESOURCE_ID;
+    }
+
+    // must be the last segment
+    if (NULL == uriPath->next)
+    {
+        LOG_URI(uriP);
+        return uriP;
+    }
+
+error:
+    LOG("Exiting on error");
+    lwm2m_free(uriP);
+    return NULL;
+}
+
+int lwm2m_stringToUri(const char * buffer,
+                      size_t buffer_len,
+                      lwm2m_uri_t * uriP)
+{
+    size_t head;
+    int readNum;
+
+    LOG_ARG("buffer_len: %u, buffer: \"%.*s\"", buffer_len, buffer_len, buffer);
+
+    if (buffer == NULL || buffer_len == 0 || uriP == NULL) return 0;
+
+    memset(uriP, 0, sizeof(lwm2m_uri_t));
+
+    // Skip any white space
+    head = 0;
+    while (head < buffer_len && isspace(buffer[head]&0xFF))
+    {
+        head++;
+    }
+    if (head == buffer_len) return 0;
+
+    // Check the URI start with a '/'
+    if (buffer[head] != '/') return 0;
+    head++;
+    if (head == buffer_len) return 0;
+
+    // Read object ID
+    readNum = prv_parseNumber((uint8_t *)buffer, buffer_len, &head);
+    if (readNum < 0 || readNum > LWM2M_MAX_ID) return 0;
+    uriP->objectId = (uint16_t)readNum;
+    uriP->flag |= LWM2M_URI_FLAG_OBJECT_ID;
+
+    if (buffer[head] == '/') head += 1;
+    if (head >= buffer_len)
+    {
+        LOG_ARG("Parsed characters: %u", head);
+        LOG_URI(uriP);
+        return head;
+    }
+
+    readNum = prv_parseNumber((uint8_t *)buffer, buffer_len, &head);
+    if (readNum < 0 || readNum >= LWM2M_MAX_ID) return 0;
+    uriP->instanceId = (uint16_t)readNum;
+    uriP->flag |= LWM2M_URI_FLAG_INSTANCE_ID;
+
+    if (buffer[head] == '/') head += 1;
+    if (head >= buffer_len)
+    {
+        LOG_ARG("Parsed characters: %u", head);
+        LOG_URI(uriP);
+        return head;
+    }
+
+    readNum = prv_parseNumber((uint8_t *)buffer, buffer_len, &head);
+    if (readNum < 0 || readNum >= LWM2M_MAX_ID) return 0;
+    uriP->resourceId = (uint16_t)readNum;
+    uriP->flag |= LWM2M_URI_FLAG_RESOURCE_ID;
+
+    if (head != buffer_len) return 0;
+
+    LOG_ARG("Parsed characters: %u", head);
+    LOG_URI(uriP);
+
+    return head;
+}
+
+int uri_toString(lwm2m_uri_t * uriP,
+                 uint8_t * buffer,
+                 size_t bufferLen,
+                 uri_depth_t * depthP)
+{
+    size_t head;
+    int res;
+
+    LOG_ARG("bufferLen: %u", bufferLen);
+    LOG_URI(uriP);
+
+    buffer[0] = '/';
+
+    if (uriP == NULL)
+    {
+        if (depthP) *depthP = URI_DEPTH_OBJECT;
+        return 1;
+    }
+
+    head = 1;
+
+    res = utils_intToText(uriP->objectId, buffer + head, bufferLen - head);
+    if (res <= 0) return -1;
+    head += res;
+    if (head >= bufferLen - 1) return -1;
+    if (depthP) *depthP = URI_DEPTH_OBJECT_INSTANCE;
+
+    if (LWM2M_URI_IS_SET_INSTANCE(uriP))
+    {
+        buffer[head] = '/';
+        head++;
+        res = utils_intToText(uriP->instanceId, buffer + head, bufferLen - head);
+        if (res <= 0) return -1;
+        head += res;
+        if (head >= bufferLen - 1) return -1;
+        if (depthP) *depthP = URI_DEPTH_RESOURCE;
+        if (LWM2M_URI_IS_SET_RESOURCE(uriP))
+        {
+            buffer[head] = '/';
+            head++;
+            res = utils_intToText(uriP->resourceId, buffer + head, bufferLen - head);
+            if (res <= 0) return -1;
+            head += res;
+            if (head >= bufferLen - 1) return -1;
+            if (depthP) *depthP = URI_DEPTH_RESOURCE_INSTANCE;
+        }
+    }
+
+    buffer[head] = '/';
+    head++;
+
+    LOG_ARG("length: %u, buffer: \"%.*s\"", head, head, buffer);
+
+    return head;
+}