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Add an intermediate step during ingest to allow the buffer to be decoded prior to sending to SB. Initial implementation is just a pass-through, thus matching existing behavior.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| /************************************************************************ | ||
| * NASA Docket No. GSC-18,719-1, and identified as “core Flight System: Bootes” | ||
| * | ||
| * Copyright (c) 2020 United States Government as represented by the | ||
| * Administrator of the National Aeronautics and Space Administration. | ||
| * All Rights Reserved. | ||
| * | ||
| * 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. | ||
| ************************************************************************/ | ||
|
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| /** | ||
| * @file | ||
| * This is the dispatch hdr file for the Command Ingest lab application. | ||
| */ | ||
| #ifndef CI_LAB_DECODE_H | ||
| #define CI_LAB_DECODE_H | ||
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| /* | ||
| ** Required header files... | ||
| */ | ||
| #include "common_types.h" | ||
| #include "cfe_sb_api_typedefs.h" | ||
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| CFE_Status_t CI_LAB_GetInputBuffer(void **BufferOut, size_t *SizeOut); | ||
| CFE_Status_t CI_LAB_DecodeInputMessage(void *SourceBuffer, size_t SourceSize, CFE_SB_Buffer_t **DestBufferOut); | ||
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| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| /************************************************************************ | ||
| * NASA Docket No. GSC-18,719-1, and identified as “core Flight System: Bootes” | ||
| * | ||
| * Copyright (c) 2020 United States Government as represented by the | ||
| * Administrator of the National Aeronautics and Space Administration. | ||
| * All Rights Reserved. | ||
| * | ||
| * 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. | ||
| ************************************************************************/ | ||
|
|
||
| /** | ||
| * \file | ||
| * This file contains the source code for the Command Ingest task. | ||
| */ | ||
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| /* | ||
| ** Include Files: | ||
| */ | ||
| #include "cfe.h" | ||
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| #include "ci_lab_app.h" | ||
| #include "ci_lab_perfids.h" | ||
| #include "ci_lab_msgids.h" | ||
| #include "ci_lab_decode.h" | ||
|
|
||
| /* | ||
| * --------------------------------------- | ||
| * In a "passthrough" configuration - the data from the network | ||
| * is expected to be a direct instance of the CFE_MSG_Message_t base, | ||
| * and thus something can be sent directly to SB. | ||
| * | ||
| * Instead of using an intermediate buffer, just get a buffer from | ||
| * SB and put it directly in there. This reduces copying. | ||
| * --------------------------------------- | ||
| */ | ||
| CFE_Status_t CI_LAB_GetInputBuffer(void **BufferOut, size_t *SizeOut) | ||
| { | ||
| CFE_SB_Buffer_t *IngestBuffer; | ||
| const size_t IngestSize = CI_LAB_MAX_INGEST; | ||
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| IngestBuffer = CFE_SB_AllocateMessageBuffer(IngestSize); | ||
| if (IngestBuffer == NULL) | ||
| { | ||
| *BufferOut = NULL; | ||
| *SizeOut = 0; | ||
|
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| CFE_EVS_SendEvent(CI_LAB_INGEST_ALLOC_ERR_EID, CFE_EVS_EventType_ERROR, "CI_LAB: buffer allocation failed\n"); | ||
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| return CFE_SB_BUF_ALOC_ERR; | ||
| } | ||
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| *BufferOut = IngestBuffer; | ||
| *SizeOut = IngestSize; | ||
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| return CFE_SUCCESS; | ||
| } | ||
|
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| /* | ||
| * --------------------------------------- | ||
| * In a "passthrough" configuration - the data from the network | ||
| * is expected to be a direct instance of the CFE_MSG_Message_t base, | ||
| * and thus something can be sent directly to SB. | ||
| * | ||
| * This just does a simple sanity check on the message size. But | ||
| * otherwise, the source buffer is used directly as the output buffer. | ||
| * --------------------------------------- | ||
| */ | ||
| CFE_Status_t CI_LAB_DecodeInputMessage(void *SourceBuffer, size_t SourceSize, CFE_SB_Buffer_t **DestBufferOut) | ||
| { | ||
| CFE_SB_Buffer_t *MsgBufPtr; | ||
| CFE_MSG_Size_t MsgSize; | ||
| CFE_Status_t Status; | ||
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| if (SourceSize < sizeof(CFE_MSG_CommandHeader_t)) | ||
| { | ||
| MsgBufPtr = NULL; | ||
| Status = CFE_STATUS_WRONG_MSG_LENGTH; | ||
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| CFE_EVS_SendEvent(CI_LAB_INGEST_LEN_ERR_EID, CFE_EVS_EventType_ERROR, | ||
| "CI: cmd dropped, bad packet length=%lu\n", (unsigned long)SourceSize); | ||
| } | ||
| else | ||
| { | ||
| MsgBufPtr = SourceBuffer; | ||
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| /* Check the size from within the header itself, compare against network buffer size */ | ||
| CFE_MSG_GetSize(&MsgBufPtr->Msg, &MsgSize); | ||
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| if (MsgSize > SourceSize) | ||
| { | ||
| Status = CFE_STATUS_WRONG_MSG_LENGTH; | ||
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| CFE_EVS_SendEvent(CI_LAB_INGEST_LEN_ERR_EID, CFE_EVS_EventType_ERROR, | ||
| "CI: cmd dropped - length mismatch, %lu (hdr) / %lu (packet)\n", (unsigned long)MsgSize, | ||
| (unsigned long)SourceSize); | ||
| } | ||
| else | ||
| { | ||
| Status = CFE_SUCCESS; | ||
| } | ||
| } | ||
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| *DestBufferOut = MsgBufPtr; | ||
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| return Status; | ||
| } |