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[platform] define otPlatTcp platform abstraction APIs (#13175)

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This commit introduces a new platform abstraction layer for TCP
connections and listeners, enabling OpenThread to leverage platform-
provided TCP stacks. The API is designed for asynchronous, event-driven
environments and can easily support POSIX as well as various embedded
network stacks.

In the core, `Ip6::PlatTcp` and its nested `Connection` and `Listener`
classes are introduced to manage these platform interactions, providing
a clean C++ interface for the OpenThread core. The `PlatTcp` manager
is integrated into the `Instance` class and utilizes `Tasklet` for
asynchronous resource cleanup.

Additionally, this commit adds a comprehensive unit test to verify the
TCP platform abstraction and `Ip6::PlatTcp` implementation. The tests
cover listener and connection lifecycles, data flow, flow control,
incoming connection acceptance, and active object iteration.
This commit is contained in:
Abtin Keshavarzian
2026-06-10 10:23:06 -07:00
committed by GitHub
parent 1b80561802
commit a055c4b9b8
21 changed files with 2630 additions and 2 deletions
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tests/unit/test_platform.cpp
+40
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@@ -658,6 +658,46 @@ OT_TOOL_WEAK void otPlatMdnsSendUnicast(otInstance *aInstance,
#endif // OPENTHREAD_CONFIG_MULTICAST_DNS_ENABLE
#if OPENTHREAD_CONFIG_PLATFORM_TCP_ENABLE
OT_TOOL_WEAK otError otPlatTcpEnableListener(otPlatTcpListener *aListener, const otPlatTcpSockAddr *aLocalSockAddr)
{
OT_UNUSED_VARIABLE(aListener);
OT_UNUSED_VARIABLE(aLocalSockAddr);
return OT_ERROR_FAILED;
}
OT_TOOL_WEAK void otPlatTcpDisableListener(otPlatTcpListener *aListener) { OT_UNUSED_VARIABLE(aListener); }
OT_TOOL_WEAK otError otPlatTcpConnect(otPlatTcpConnection *aConn,
const otPlatTcpSockAddr *aPeerSockAddr,
const otPlatTcpSockAddr *aLocalSockAddr)
{
OT_UNUSED_VARIABLE(aConn);
OT_UNUSED_VARIABLE(aPeerSockAddr);
OT_UNUSED_VARIABLE(aLocalSockAddr);
return OT_ERROR_FAILED;
}
OT_TOOL_WEAK void otPlatTcpNotifyTxPending(otPlatTcpConnection *aConn) { OT_UNUSED_VARIABLE(aConn); }
OT_TOOL_WEAK uint16_t otPlatTcpSend(otPlatTcpConnection *aConn, const uint8_t *aBuffer, uint16_t aLength)
{
OT_UNUSED_VARIABLE(aConn);
OT_UNUSED_VARIABLE(aBuffer);
OT_UNUSED_VARIABLE(aLength);
return 0;
}
OT_TOOL_WEAK void otPlatTcpClose(otPlatTcpConnection *aConn) { OT_UNUSED_VARIABLE(aConn); }
OT_TOOL_WEAK void otPlatTcpAbort(otPlatTcpConnection *aConn) { OT_UNUSED_VARIABLE(aConn); }
#endif // #if OPENTHREAD_CONFIG_PLATFORM_TCP_ENABLE
#if OPENTHREAD_CONFIG_DNS_DSO_ENABLE
OT_TOOL_WEAK void otPlatDsoEnableListening(otInstance *aInstance, bool aEnable)