Fixes Matter AWS connection stability issues (#567)

Author: sabollim-silabs

examples/platform/silabs/matter_aws/matter_aws_interface/include/MatterAws.h

@@ -1,6 +1,6 @@
 /**
  * @file
- * @brief Matter abstraction layer for Direct Internet Connectivity.
+ * @brief Matter abstraction layer for AWS
  *******************************************************************************
  * # License
  * <b>Copyright 2023 Silicon Laboratories Inc.

examples/platform/silabs/matter_aws/matter_aws_interface/include/MatterAwsConfig.h

@@ -21,6 +21,8 @@
 #ifndef __MATTER_AWS_CONFIG_H
 #define __MATTER_AWS_CONFIG_H
 
+#include "cmsis_os2.h"
+
 /* Instance configuration */
 
 #ifndef SL_MATTER_AWS_NVM_EMBED_CERT
@@ -30,7 +32,7 @@
 /* Task Configuration */
 #define MATTER_AWS_TASK_NAME "MATTER_AWS"
 #define MATTER_AWS_TASK_STACK_SIZE (2 * 1024) // 2k
-#define MATTER_AWS_TASK_PRIORITY (5)
+#define MATTER_AWS_TASK_PRIORITY (osPriorityAboveNormal)
 
 /* Network Configuration */
 #define MATTER_AWS_SERVER_HOST ""

examples/platform/silabs/matter_aws/matter_aws_interface/src/MatterAws.cpp

@@ -1,6 +1,6 @@
 /**
  * @file
- * @brief Matter abstraction layer for Direct Internet Connectivity.
+ * @brief Matter abstraction layer for AWS.
  *******************************************************************************
  * # License
  * <b>Copyright 2020 Silicon Laboratories Inc.

src/lwip/silabs/lwipopts-rs911x.h

@@ -67,18 +67,17 @@
 #define TCP_QUEUE_OOSEQ 0
 #define ARP_QUEUEING (0)
 #define TCPIP_THREAD_NAME "LWIP"
+#define TCPIP_THREAD_PRIO osPriorityAboveNormal
 
 #define LWIP_SOCKET 0
 
 #ifdef SL_MATTER_ENABLE_AWS
 #define LWIP_DNS 1
 #define DNS_RAND_TXID() ((u32_t) rand())
 #define TCP_MSS (4 * 1152)
-#define TCPIP_THREAD_PRIO osPriorityRealtime7
 #else
 #define LWIP_DNS 0
 #define TCP_MSS (1152)
-#define TCPIP_THREAD_PRIO osPriorityAboveNormal
 #endif /* SL_MATTER_ENABLE_AWS */
 
 #define LWIP_FREERTOS_USE_STATIC_TCPIP_TASK 1

src/lwip/silabs/lwipopts-wf200.h

@@ -67,6 +67,7 @@
 #define TCP_QUEUE_OOSEQ 0
 #define ARP_QUEUEING (0)
 #define TCPIP_THREAD_NAME "LWIP"
+#define TCPIP_THREAD_PRIO osPriorityAboveNormal
 
 #define LWIP_SOCKET 0
 
@@ -76,12 +77,11 @@
 #define MEM_SIZE 5632
 #define MEMP_NUM_UDP_PCB (6)
 #define TCP_MSS (4 * 1152)
-#define TCPIP_THREAD_PRIO osPriorityHigh7
 #else
 #define LWIP_DNS 0
 #define MEMP_NUM_UDP_PCB (5)
 #define TCP_MSS (1152)
-#define TCPIP_THREAD_PRIO osPriorityAboveNormal
+
 #endif // SL_MATTER_ENABLE_AWS
 
 #define LWIP_FREERTOS_USE_STATIC_TCPIP_TASK 1

src/platform/silabs/SiWx917/siwx917-chip-mbedtls-config.h

@@ -29,7 +29,9 @@
 // MATTER AWS Specific Configurations
 #ifdef SL_MATTER_ENABLE_AWS
 
+#ifndef MBEDTLS_MPI_MAX_SIZE
 #define MBEDTLS_MPI_MAX_SIZE 512
+#endif // MBEDTLS_MPI_MAX_SIZE
 
 #define MBEDTLS_CIPHER_MODE_CBC
 #define MBEDTLS_CIPHER_MODE_WITH_PADDING
@@ -38,9 +40,18 @@
 #define MBEDTLS_RSA_C
 #define MBEDTLS_RSA_NO_CRT
 #define MBEDTLS_SHA1_C
+
+#ifndef MBEDTLS_SSL_IN_CONTENT_LEN
 #define MBEDTLS_SSL_IN_CONTENT_LEN 5120
+#endif // MBEDTLS_SSL_IN_CONTENT_LEN
+
+#ifndef MBEDTLS_SSL_MAX_CONTENT_LEN
 #define MBEDTLS_SSL_MAX_CONTENT_LEN 5120
+#endif // MBEDTLS_SSL_MAX_CONTENT_LEN
+
+#ifndef MBEDTLS_SSL_OUT_CONTENT_LEN
 #define MBEDTLS_SSL_OUT_CONTENT_LEN 1560
+#endif // MBEDTLS_SSL_OUT_CONTENT_LEN
 
 #define MBEDTLS_DEBUG_C
 #define MBEDTLS_X509_USE_C

third_party/silabs/mqtt/mqtt_transport_interface/include/altcp_tls_mbedtls_opts.h

@@ -52,7 +52,7 @@
 
 /** Configure debug level of this file */
 #ifndef ALTCP_MBEDTLS_DEBUG
-#define ALTCP_MBEDTLS_DEBUG 4
+#define ALTCP_MBEDTLS_DEBUG 0
 #endif
 
 /** Set a session timeout in seconds for the basic session cache

third_party/silabs/mqtt/mqtt_transport_interface/src/altcp_tls_mbedtls.c

@@ -1161,6 +1161,8 @@ static int altcp_mbedtls_bio_send(void *ctx, const unsigned char *dataptr, size_
       return MBEDTLS_ERR_NET_SEND_FAILED;
     }
   }
+  // Send data immediately after write to avoid queuing
+  altcp_output(conn->inner_conn);
   return written;
 }