diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/pbuffer')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/pbuffer/iot_pbuffer.c | 467 | ||||
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/pbuffer/iot_pbuffer.h | 175 |
2 files changed, 642 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/pbuffer/iot_pbuffer.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/pbuffer/iot_pbuffer.c new file mode 100644 index 0000000..6611396 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/pbuffer/iot_pbuffer.c @@ -0,0 +1,467 @@ +/** + * Copyright (c) 2014 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, 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. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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. + * + */ +#include "nrf_soc.h" +#include "nordic_common.h" +#include "sdk_common.h" +#include "sdk_config.h" +#include "iot_common.h" +#include "iot_pbuffer.h" +#include "mem_manager.h" + +#if IOT_PBUFFER_CONFIG_LOG_ENABLED + +#define NRF_LOG_MODULE_NAME pbuffer + +#define NRF_LOG_LEVEL IOT_PBUFFER_CONFIG_LOG_LEVEL +#define NRF_LOG_INFO_COLOR IOT_PBUFFER_CONFIG_INFO_COLOR +#define NRF_LOG_DEBUG_COLOR IOT_PBUFFER_CONFIG_DEBUG_COLOR + +#include "nrf_log.h" +NRF_LOG_MODULE_REGISTER(); + +#define PBUFFER_TRC NRF_LOG_DEBUG /**< Used for getting trace of execution in the module. */ +#define PBUFFER_ERR NRF_LOG_ERROR /**< Used for logging errors in the module. */ +#define PBUFFER_DUMP NRF_LOG_HEXDUMP_DEBUG /**< Used for dumping octet information to get details of bond information etc. */ + +#define PBUFFER_ENTRY() PBUFFER_TRC(">> %s", __func__) +#define PBUFFER_EXIT() PBUFFER_TRC("<< %s", __func__) + +#else // IOT_PBUFFER_CONFIG_LOG_ENABLED + +#define PBUFFER_TRC(...) /**< Disables traces. */ +#define PBUFFER_DUMP(...) /**< Disables dumping of octet streams. */ +#define PBUFFER_ERR(...) /**< Disables error logs. */ + +#define PBUFFER_ENTRY(...) +#define PBUFFER_EXIT(...) + +#endif // IOT_PBUFFER_CONFIG_LOG_ENABLED + +/** + * @defgroup api_param_check API Parameters check macros. + * + * @details Macros that verify parameters passed to the module in the APIs. These macros + * could be mapped to nothing in final versions of code to save execution and size. + * BLE_HPS_DISABLE_API_PARAM_CHECK should be defined to disable these checks. + * + * @{ + */ +#if (IOT_PBUFFER_DISABLE_API_PARAM_CHECK == 0) + +/**@brief Macro to check is module is initialized before requesting one of the module procedures. */ +#define VERIFY_MODULE_IS_INITIALIZED() \ + if (m_initialization_state == false) \ + { \ + return (SDK_ERR_MODULE_NOT_INITIALIZED | IOT_PBUFFER_ERR_BASE); \ + } + +/**@brief Macro to check is module is initialized before requesting one of the module + procedures but does not use any return code. */ +#define VERIFY_MODULE_IS_INITIALIZED_VOID() \ + if (m_initialization_state == false) \ + { \ + return; \ + } + +/** + * @brief Verify NULL parameters are not passed to API by application. + */ +#define NULL_PARAM_CHECK(PARAM) \ + if ((PARAM) == NULL) \ + { \ + return (NRF_ERROR_NULL | IOT_PBUFFER_ERR_BASE); \ + } + +/** + * @brief Verify Type field has valid value. + */ +#define VERIFY_PBUFFER_TYPE(TYPE) \ + if (((TYPE) == 0) || ((TYPE) > COAP_PACKET_TYPE)) \ + { \ + return (NRF_ERROR_INVALID_PARAM | IOT_PBUFFER_ERR_BASE); \ + } + + +/** + * @brief Verify flags field has valid value. + */ +#define VERIFY_PBUFFER_FLAGS(FLAG) \ + if ((uint32_t)(FLAG) > PBUFFER_FLAG_NO_MEM_ALLOCATION) \ + { \ + return (NRF_ERROR_INVALID_PARAM | IOT_PBUFFER_ERR_BASE); \ + } + +/** + * @brief Verify flags field has valid value. + */ +#define VERIFY_NON_ZERO_LENGTH(LEN) \ + if ((LEN) ==0) \ + { \ + return (NRF_ERROR_INVALID_LENGTH | IOT_PBUFFER_ERR_BASE); \ + } + +#else //IOT_PBUFFER_DISABLE_API_PARAM_CHECK + +#define VERIFY_MODULE_IS_INITIALIZED() +#define VERIFY_MODULE_IS_INITIALIZED_VOID() +#define NULL_PARAM_CHECK(PARAM) +#define VERIFY_PBUFFER_TYPE(TYPE) +#define VERIFY_PBUFFER_FLAGS(FLAG) +#define VERIFY_NON_ZERO_LENGTH(LEN) + +#endif //IOT_PBUFFER_DISABLE_API_PARAM_CHECK + +/** + * @defgroup ble_ipsp_mutex_lock_unlock Module's Mutex Lock/Unlock Macros. + * + * @details Macros used to lock and unlock modules. Currently, SDK does not use mutexes but + * framework is provided in case need arises to use an alternative architecture. + * @{ + */ +#define PBUFFER_MUTEX_LOCK() SDK_MUTEX_LOCK(m_pbuffer_mutex) /**< Lock module using mutex */ +#define PBUFFER_MUTEX_UNLOCK() SDK_MUTEX_UNLOCK(m_pbuffer_mutex) /**< Unlock module using mutex */ +/** @} */ + +/** @brief Packet buffer type managed by the module. */ +typedef struct +{ + iot_pbuffer_t buffer; /**< Packet buffer being managed. */ + uint32_t allocated_length; /**< Length allocated for the buffer. */ +}pbuffer_t; + +SDK_MUTEX_DEFINE(m_pbuffer_mutex) /**< Mutex variable. Currently unused, this declaration does not occupy any space in RAM. */ +static bool m_initialization_state = false; /**< Variable to maintain module initialization state. */ +static pbuffer_t m_pbuffer[IOT_PBUFFER_MAX_COUNT]; /**< Table of packet buffers managed by the module. */ + + +/**@brief Initializes packet buffer. */ +static void pbuffer_init(pbuffer_t * p_buffer) +{ + p_buffer->buffer.p_memory = NULL; + p_buffer->buffer.p_payload = NULL; + p_buffer->buffer.length = 0; + p_buffer->buffer.type = UNASSIGNED_TYPE; + p_buffer->allocated_length = 0; +} + + +/**@brief Get size of offset to be used based on the requested type. */ +static uint32_t type_offset_get(iot_pbuffer_type_t type) +{ + uint32_t offset = 0; + + switch (type) + { + case RAW_PACKET_TYPE: + { + offset = 0; + break; + } + case IPV6_PACKET_TYPE: + { + offset = IPV6_IP_HEADER_SIZE; + break; + } + case ICMP6_PACKET_TYPE: + { + offset = IPV6_IP_HEADER_SIZE + ICMP6_HEADER_SIZE; + break; + } + case UDP6_PACKET_TYPE: // Fall through. + { + offset = IPV6_IP_HEADER_SIZE + UDP_HEADER_SIZE; + break; + } + case COAP_PACKET_TYPE: + { + offset = IPV6_IP_HEADER_SIZE + UDP_HEADER_SIZE + COAP_HEADER_SIZE; + break; + } + default: + { + // Should never happen. + break; + } + } + + return offset; +} + + +/**@brief Allocates 'length' sized packet buffer. */ +static uint32_t pbuffer_allocate(pbuffer_t ** pp_buffer, uint32_t length, iot_pbuffer_flags_t flags) +{ + uint32_t index; + uint32_t err_code = (NRF_ERROR_NO_MEM | IOT_PBUFFER_ERR_BASE); + + + for (index = 0; index < IOT_PBUFFER_MAX_COUNT; index ++) + { + if (m_pbuffer[index].allocated_length == 0) + { + // Found a free buffer, allocate. + PBUFFER_TRC("Found free buffer. Requesting memory allocation."); + + m_pbuffer[index].allocated_length = length; + + if (flags == PBUFFER_FLAG_DEFAULT) + { + err_code = nrf_mem_reserve(&m_pbuffer[index].buffer.p_memory, &m_pbuffer[index].allocated_length); + if (err_code == NRF_SUCCESS) + { + PBUFFER_TRC("Allocated pbuffer at index 0x%08lX", index); + (*pp_buffer) = &m_pbuffer[index]; + } + else + { + PBUFFER_ERR("Failed to allocate memory for packet buffer of size %ld", length); + m_pbuffer[index].allocated_length = 0; + } + } + else + { + PBUFFER_TRC("Allocated pbuffer at index 0x%08lX without any memory allocation.", index); + (*pp_buffer) = &m_pbuffer[index]; + err_code = NRF_SUCCESS; + } + break; + } + } + + return err_code; +} + + +/**@brief Finds the internal buffer based on the external iot_pbuffer_t. */ +static uint32_t pbuffer_find(pbuffer_t ** p_internal_buffer, iot_pbuffer_t * p_buffer) +{ + const uint32_t size = sizeof (pbuffer_t); + const uint32_t diff = (((uint32_t)p_buffer) - ((uint32_t)m_pbuffer)); + + if ((diff > (size * IOT_PBUFFER_MAX_COUNT)) || + ((diff % size) != 0)) + { + return (NRF_ERROR_INVALID_ADDR | IOT_PBUFFER_ERR_BASE); + } + + (*p_internal_buffer) = (pbuffer_t *) p_buffer; + + return NRF_SUCCESS; +} + + +uint32_t iot_pbuffer_init(void) +{ + uint32_t index; + + PBUFFER_ENTRY(); + + SDK_MUTEX_INIT(m_pbuffer_mutex); + + PBUFFER_MUTEX_LOCK(); + + for (index = 0; index < IOT_PBUFFER_MAX_COUNT; index++) + { + pbuffer_init(&m_pbuffer[index]); + } + + m_initialization_state = true; + + PBUFFER_EXIT(); + + PBUFFER_MUTEX_UNLOCK(); + + return NRF_SUCCESS; +} + + +uint32_t iot_pbuffer_allocate(iot_pbuffer_alloc_param_t * p_param, + iot_pbuffer_t ** pp_pbuffer) +{ + VERIFY_MODULE_IS_INITIALIZED(); + NULL_PARAM_CHECK(p_param); + NULL_PARAM_CHECK(pp_pbuffer); + VERIFY_PBUFFER_TYPE(p_param->type); + VERIFY_PBUFFER_FLAGS(p_param->flags); + VERIFY_NON_ZERO_LENGTH(p_param->length); + + PBUFFER_ENTRY(); + + PBUFFER_MUTEX_LOCK(); + + uint32_t err_code; + uint32_t offset; + pbuffer_t * p_alloc_buffer; + + // Get offset to be added to length. + offset = type_offset_get(p_param->type); + + err_code = pbuffer_allocate(&p_alloc_buffer, ((p_param->length) + offset), p_param->flags); + if (err_code == NRF_SUCCESS) + { + p_alloc_buffer->buffer.length = p_param->length; + p_alloc_buffer->buffer.type = p_param->type; + + if (p_param->flags != PBUFFER_FLAG_NO_MEM_ALLOCATION) + { + p_alloc_buffer->buffer.p_payload = ((p_alloc_buffer->buffer.p_memory) + offset); + } + + (*pp_pbuffer) = &p_alloc_buffer->buffer; + } + + PBUFFER_MUTEX_UNLOCK(); + + PBUFFER_EXIT(); + + return err_code; +} + + +uint32_t iot_pbuffer_reallocate(iot_pbuffer_alloc_param_t * p_param, + iot_pbuffer_t * p_pbuffer) +{ + VERIFY_MODULE_IS_INITIALIZED(); + NULL_PARAM_CHECK(p_param); + NULL_PARAM_CHECK(p_pbuffer); + VERIFY_PBUFFER_TYPE(p_param->type); + VERIFY_PBUFFER_FLAGS(p_param->flags); + VERIFY_NON_ZERO_LENGTH(p_param->length); + + PBUFFER_ENTRY(); + + PBUFFER_MUTEX_LOCK(); + + uint32_t err_code; + uint32_t realloc_len; + pbuffer_t * p_alloc_buffer; + + // Ensure pointer provided is in the ranged managed by the module. + err_code = pbuffer_find(&p_alloc_buffer, p_pbuffer); + + if (err_code == NRF_SUCCESS) + { + // Get realloc_len to be added to length. + const uint32_t offset = type_offset_get(p_param->type); + realloc_len = p_param->length + offset; + + // Check if requested length cannot be accommodated in the allocated buffer. + if (realloc_len > p_alloc_buffer->allocated_length) + { + // No, it cannot be, request a new buffer. + uint8_t * p_new_mem; + + if (p_param->flags != PBUFFER_FLAG_NO_MEM_ALLOCATION) + { + err_code = nrf_mem_reserve(&p_new_mem, &realloc_len); + if (err_code == NRF_SUCCESS) + { + // Copy data into the new buffer. + memcpy (p_new_mem, + p_pbuffer->p_memory, + p_alloc_buffer->allocated_length); + + // Now free the old buffer. Perform the free + nrf_free(p_alloc_buffer->buffer.p_memory); + + p_alloc_buffer->allocated_length = realloc_len; + p_alloc_buffer->buffer.p_memory = p_new_mem; + p_alloc_buffer->buffer.length = p_param->length; + } + } + } + + if (err_code == NRF_SUCCESS) + { + p_alloc_buffer->buffer.length = p_param->length; + p_alloc_buffer->buffer.type = p_param->type; + + if (p_param->flags == PBUFFER_FLAG_DEFAULT) + { + p_alloc_buffer->buffer.p_payload = (p_alloc_buffer->buffer.p_memory + offset); + } + } + } + else + { + PBUFFER_ERR("Cannot find buffer to be freed."); + } + + PBUFFER_MUTEX_UNLOCK(); + + PBUFFER_EXIT(); + + return err_code; +} + + +uint32_t iot_pbuffer_free(iot_pbuffer_t * p_pbuffer, bool free_flag) +{ + VERIFY_MODULE_IS_INITIALIZED(); + NULL_PARAM_CHECK(p_pbuffer); + + PBUFFER_ENTRY(); + + PBUFFER_MUTEX_LOCK(); + + uint32_t err_code; + pbuffer_t * p_alloc_buffer; + + // Ensure pointer provided is in the ranged managed by the module. + err_code = pbuffer_find(&p_alloc_buffer, p_pbuffer); + if (err_code == NRF_SUCCESS) + { + if (free_flag == true) + { + nrf_free(p_alloc_buffer->buffer.p_memory); + } + pbuffer_init(p_alloc_buffer); + } + else + { + PBUFFER_ERR("Cannot find buffer to be freed."); + } + + PBUFFER_MUTEX_UNLOCK(); + + PBUFFER_EXIT(); + + return err_code; +} diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/pbuffer/iot_pbuffer.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/pbuffer/iot_pbuffer.h new file mode 100644 index 0000000..e13da3a --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/pbuffer/iot_pbuffer.h @@ -0,0 +1,175 @@ +/** + * Copyright (c) 2014 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, 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. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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. + * + */ +/** @file + * + * @defgroup iot_pbuffer Packet Buffer + * @{ + * @ingroup iot_sdk_stack + * @brief Packet buffer management for IPv6 stack layers to minimize data copy across stack layers. + * + * @details This module interfaces with the Memory Manager to allocate packet buffers + * for the IPv6 stack layers, without each layer having to ensure + * sufficient header space for layers below. + */ +#ifndef IOT_PBUFFER__ +#define IOT_PBUFFER__ + +#include <stdint.h> +#include <stdbool.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/**@brief IPv6 packet type identifiers that are needed to ensure that enough + * space is reserved for headers from layers below during memory allocation. + */ +typedef enum +{ + UNASSIGNED_TYPE = 0, /**< Indicates that the packet buffer is unassigned and not in use. */ + RAW_PACKET_TYPE = 1, /**< Raw packet, with no room made for headers of any lower layer. */ + IPV6_PACKET_TYPE = 2, /**< Indicates that the packet buffer is requested for an entire IPv6 packet; pbuffer provisions 40 bytes of IPv6 header. */ + ICMP6_PACKET_TYPE = 3, /**< Indicates that the packet buffer is requested for an ICMPv6 packet, and provision for 40 bytes of IPv6 header is made by pbuffer. */ + UDP6_PACKET_TYPE = 4, /**< Indicates that the packet buffer is requested for a UDP packet, and provision for 40 bytes of IPv6 header and UDP header is made by pbuffer. */ + COAP_PACKET_TYPE = 5 /**< Indicates that the packet buffer is requested for a CoAP packet, and provision for 4 bytes of CoAP header, 8 bytes of UDP header, and 40 bytes of IPv6 header is made. */ +}iot_pbuffer_type_t; + +/**@brief Additional information that must be provided to the module during allocation + * or reallocation to ensure optimal utilization of memory and avoid unnecessary data + * copies. + */ +typedef enum +{ + PBUFFER_FLAG_DEFAULT = 0, /**< Default behavior with respect to memory allocation when allocating packet buffer. Memory will be allocated for the length indicated by this default.*/ + PBUFFER_FLAG_NO_MEM_ALLOCATION = 1, /**< Only allocate packet buffer, not memory. This is needed when a packet already exists and the packet buffer is needed only to feed it to the IPv6 stack.*/ +}iot_pbuffer_flags_t; + +/**@brief Packet buffer used for exchanging IPv6 payload across layers in both receive and transmit + * paths. + */ +typedef struct +{ + iot_pbuffer_type_t type; /**< Determines if any offset for lower layers must be provisioned for in the stack. */ + uint8_t * p_memory; /**< Pointer to actual memory allocated for the buffer. */ + uint8_t * p_payload; /**< Pointer to memory where the payload for the layer that allocates the packet buffer should be contained. */ + uint32_t length; /**< Length of the payload of the layer processing it. This value can be modified by each layer of the IPv6 stack based on the required header information added by each.*/ +}iot_pbuffer_t; + + +/**@brief Parameters required to allocate the packet buffer. */ +typedef struct +{ + iot_pbuffer_type_t type; /**< Payload type for which the packet buffer is requested to be allocated or reallocated. */ + iot_pbuffer_flags_t flags; /**< Flags that indicate if memory allocation is needed or not. */ + uint32_t length; /**< Length of payload for which the packet buffer is requested. */ +}iot_pbuffer_alloc_param_t; + + +/**@brief Function for initializing the module. + * + * @retval NRF_SUCCESS If the module was successfully initialized. Otherwise, an error code that indicates the reason for the failure is returned. + */ +uint32_t iot_pbuffer_init(void); + + +/**@brief Function for allocating a packet buffer. + * + * @param[in] p_param Pointer to allocation parameters that indicate the length of the payload requested, + * the type of payload, and additional information using the flags. This + * parameter cannot be NULL. + * @param[out] pp_pbuffer Pointer to allocated packet buffer. This parameter shall + * not be NULL. + * + * @retval NRF_SUCCESS If the packet buffer was successfully allocated. Otherwise, an error code that indicates the reason for the failure is returned. + */ +uint32_t iot_pbuffer_allocate(iot_pbuffer_alloc_param_t * p_param, + iot_pbuffer_t ** pp_pbuffer); + + +/**@brief Function for reallocating a packet buffer. + * + * Reallocation requests are treated as follows: + * - If the requested reallocation is less than or equal to the allocated size, + * no data is moved, and the function returns NRF_SUCCESS. + * - If the requested reallocation is more than what is allocated, the function + * requests new memory, backs up existing data, and then frees the previously + * allocated memory. + * - If reallocation is requested with the PBUFFER_FLAG_NO_MEM_ALLOCATION flag, + * the function does not free previously allocated memory or copy it to the + * new location. In this case, the application that uses the pbuffer must + * decide when to move previously allocated memory and when to free it and + * handle this. + * + * @param[in] p_param Pointer to reallocation parameters that indicate the length of the payload requested, + * the type of payload, and additional information using the flags. This + * parameter cannot be NULL. + * @param[in] p_pbuffer Pointer to the packet buffer being reallocated. This parameter shall + * not be NULL. + * + * @retval NRF_SUCCESS If the packet buffer was successfully reallocated. Otherwise, an error code that indicates the reason for the failure is returned. + */ +uint32_t iot_pbuffer_reallocate(iot_pbuffer_alloc_param_t * p_param, + iot_pbuffer_t * p_pbuffer); + + +/**@brief Function for freeing a packet buffer. + * + * This function frees the packet buffer. If the parameter free_flag is set, the + * function tries to free the memory allocated as well. This action is performed + * irrespective of whether the memory was allocated using the PBUFFER_FLAG_DEFAULT or + * the PBUFFER_FLAG_NO_MEM_ALLOCATION flag. + * + * @param[in] p_pbuffer Pointer to the packet buffer requested to be freed. This parameter shall + * not be NULL. + * @param[in] free_flag Indicates if the allocated memory should be freed or not when freeing the + * packet buffer. + * + * @retval NRF_SUCCESS If the packet buffer was successfully freed. Otherwise, an error code that indicates the reason for the failure is returned. + * + */ +uint32_t iot_pbuffer_free(iot_pbuffer_t * p_pbuffer, bool free_flag); + +#ifdef __cplusplus +} +#endif + +#endif // IOT_PBUFFER__ + +/**@} */ |