[trel] add config for peer table size and packet pool size (#9750)

src/core/BUILD.gn

@@ -825,6 +825,7 @@ source_set("libopenthread_core_config") {
     "config/srp_server.h",
     "config/time_sync.h",
     "config/tmf.h",
+    "config/trel.h",
     "openthread-core-config.h",
   ]
   public_configs = [

src/core/config/trel.h

@@ -0,0 +1,66 @@
+/*
+ *  Copyright (c) 2024, The OpenThread Authors.
+ *  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 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 the copyright holder 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 HOLDER 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
+ *   This file includes compile-time configurations for TREL.
+ *
+ */
+
+#ifndef CONFIG_TREL_H_
+#define CONFIG_TREL_H_
+
+/**
+ * @addtogroup config-trel
+ *
+ * @brief
+ *   This module includes configuration variables for TREL.
+ *
+ * @{
+ *
+ */
+
+/**
+ * @def OPENTHREAD_CONFIG_TREL_PEER_TABLE_SIZE
+ *
+ * Specifies the capacity of TREL peer table. Only non-zero value
+ * will be directly used for setting the TREL peer table capacity.
+ * Zero value lets the size to be determined by the OT stack itself
+ * which is derived based on other configurations such as a child
+ * table size, neighbor table size, etc.
+ */
+#ifndef OPENTHREAD_CONFIG_TREL_PEER_TABLE_SIZE
+#define OPENTHREAD_CONFIG_TREL_PEER_TABLE_SIZE (0)
+#endif
+
+/**
+ * @}
+ *
+ */
+
+#endif // CONFIG_TREL_H_

src/core/openthread-core-config.h

@@ -114,6 +114,7 @@
 #include "config/srp_server.h"
 #include "config/time_sync.h"
 #include "config/tmf.h"
+#include "config/trel.h"
 
 #undef OPENTHREAD_CORE_CONFIG_H_IN
 

src/core/radio/trel_interface.hpp

@@ -229,9 +229,12 @@ class Interface : public InstanceLocator
     bool IsFilterEnabled(void) const { return mFiltered; }
 
 private:
+#if OPENTHREAD_COFNIG_TREL_PEER_TABLE_SIZE != 0
+    static constexpr uint16_t kPeerTableSize = OPENTHREAD_COFNIG_TREL_PEER_TABLE_SIZE;
+#else
     static constexpr uint16_t kPeerTableExtraEntries = 32;
     static constexpr uint16_t kPeerTableSize         = Mle::kMaxRouters + Mle::kMaxChildren + kPeerTableExtraEntries;
-
+#endif
     static const char kTxtRecordExtAddressKey[];
     static const char kTxtRecordExtPanIdKey[];
 

src/posix/platform/openthread-posix-config.h

@@ -419,4 +419,14 @@
 #define OPENTHREAD_POSIX_CONFIG_EXIT_ON_INFRA_NETIF_LOST_ENABLE 1
 #endif
 
+/**
+ * @def OPENTHREAD_POSIX_CONFIG_TREL_TX_PACKET_POOL_SIZE
+ *
+ * This setting configures the capacity of TREL packet pool for transmission.
+ *
+ */
+#ifndef OPENTHREAD_POSIX_CONFIG_TREL_TX_PACKET_POOL_SIZE
+#define OPENTHREAD_POSIX_CONFIG_TREL_TX_PACKET_POOL_SIZE 5
+#endif
+
 #endif // OPENTHREAD_PLATFORM_CONFIG_H_

src/posix/platform/trel.cpp

@@ -51,20 +51,19 @@
 
 #if OPENTHREAD_CONFIG_RADIO_LINK_TREL_ENABLE
 
-#define TREL_MAX_PACKET_SIZE 1400
-#define TREL_PACKET_POOL_SIZE 5
+static constexpr uint16_t kMaxPacketSize = 1400; // The max size of a TREL packet.
 
 typedef struct TxPacket
 {
     struct TxPacket *mNext;
-    uint8_t          mBuffer[TREL_MAX_PACKET_SIZE];
+    uint8_t          mBuffer[kMaxPacketSize];
     uint16_t         mLength;
     otSockAddr       mDestSockAddr;
 } TxPacket;
 
-static uint8_t   sRxPacketBuffer[TREL_MAX_PACKET_SIZE];
+static uint8_t   sRxPacketBuffer[kMaxPacketSize];
 static uint16_t  sRxPacketLength;
-static TxPacket  sTxPacketPool[TREL_PACKET_POOL_SIZE];
+static TxPacket  sTxPacketPool[OPENTHREAD_POSIX_CONFIG_TREL_TX_PACKET_POOL_SIZE];
 static TxPacket *sFreeTxPacketHead;  // A singly linked list of free/available `TxPacket` from pool.
 static TxPacket *sTxPacketQueueTail; // A circular linked list for queued tx packets.
 
@@ -456,7 +455,7 @@ void otPlatTrelSend(otInstance       *aInstance,
 
     VerifyOrExit(sEnabled);
 
-    assert(aUdpPayloadLen <= TREL_MAX_PACKET_SIZE);
+    assert(aUdpPayloadLen <= kMaxPacketSize);
 
     // We try to send the packet immediately. If it fails (e.g.,
     // network is down) `SendPacket()` returns `OT_ERROR_ABORT`. If