commit 972ed8d7938b49b5c74b5f4d0aa0833c8c463147
author Simon Lin <simonlin@google.com> Mon May 02 10:18:34 2022 +0800
committer GitHub <noreply@github.com> Sun May 01 19:18:34 2022 -0700
tree 98d02ad93de99b8133d1e1961c39e1c8c1793548
parent b0e532b13854fa379e9cf9e902b36ec5ca0756c2

[posix-trel] allow using fixed TREL UDP port (#7646)

This commit adds the configuration
`OPENTHREAD_CONFIG_POSIX_TREL_UDP_PORT` to allow TREL to use a fixed
UDP port number on POSIX platform.

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

diff --git a/src/posix/platform/openthread-posix-config.h b/src/posix/platform/openthread-posix-config.h
index a348a17..bc43bdf 100644
--- a/src/posix/platform/openthread-posix-config.h
+++ b/src/posix/platform/openthread-posix-config.h
@@ -229,4 +229,15 @@
 #error "OPENTHREAD_CONFIG_POSIX_TREL_USE_NETLINK_SOCKET was removed (no longer applicable with TREL over DNS-SD)."
 #endif
 
+/**
+ * @def OPENTHREAD_POSIX_CONFIG_TREL_UDP_PORT
+ *
+ * This setting configures the TREL UDP port number.
+ * Define as 0 to use an ephemeral port number.
+ *
+ */
+#ifndef OPENTHREAD_POSIX_CONFIG_TREL_UDP_PORT
+#define OPENTHREAD_POSIX_CONFIG_TREL_UDP_PORT 0
+#endif
+
 #endif // OPENTHREAD_PLATFORM_CONFIG_H_

src/posix/platform/trel.cpp

diff --git a/src/posix/platform/trel.cpp b/src/posix/platform/trel.cpp
index b3d9c36..f3ec6cf 100644
--- a/src/posix/platform/trel.cpp
+++ b/src/posix/platform/trel.cpp
@@ -137,7 +137,7 @@
     memset(&sockAddr, 0, sizeof(sockAddr));
     sockAddr.sin6_family = AF_INET6;
     sockAddr.sin6_addr   = in6addr_any;
-    sockAddr.sin6_port   = 0;
+    sockAddr.sin6_port   = OPENTHREAD_POSIX_CONFIG_TREL_UDP_PORT;
 
     if (bind(sSocket, (struct sockaddr *)&sockAddr, sizeof(sockAddr)) == -1)
     {