commit c7897c3beb04bcc2040c32fdc89a357fe5ce74fd
author Yakun Xu <xyk@google.com> Mon Apr 29 18:34:21 2024 +0800
committer Yakun Xu <xyk@google.com> Thu May 16 16:30:34 2024 +0800
tree ba3cbec8543a6d80a0d8314d62af86fd69934bb5
parent 27db8f3a135903b300a943006423a2100c953a11

Thread: simulate radio over Ethernet on Cuttlefish

This commit simulates Thread radio over Ethernet on cuttlefish.

This enables two cuttlefish instances to communicate over Thread.

Test: presubmit
Bug: 329188649

Change-Id: I48b20a9eb0bbc535e67266ca9cf7e4bbc5a676d4

threadnetwork/aidl/default/main.cpp

diff --git a/threadnetwork/aidl/default/main.cpp b/threadnetwork/aidl/default/main.cpp
index 26683bf..6514184 100644
--- a/threadnetwork/aidl/default/main.cpp
+++ b/threadnetwork/aidl/default/main.cpp
@@ -18,7 +18,11 @@
 #include <android-base/logging.h>
 #include <android/binder_manager.h>
 #include <android/binder_process.h>
+#include <netinet/in.h>
+#include <net/if.h>
 #include <utils/Log.h>
+#include <cutils/properties.h>
+#include <sys/stat.h>
 
 #include "service.hpp"
 #include "thread_chip.hpp"
@@ -26,6 +30,8 @@
 using aidl::android::hardware::threadnetwork::IThreadChip;
 using aidl::android::hardware::threadnetwork::ThreadChip;
 
+#define THREADNETWORK_COPROCESSOR_SIMULATION_PATH "/apex/com.android.hardware.threadnetwork/bin/ot-rcp"
+
 namespace {
 void addThreadChip(int id, const char* url) {
     binder_status_t status;
@@ -41,14 +47,36 @@
     status = AServiceManager_addService(threadChip->asBinder().get(), serviceName.c_str());
     CHECK_EQ(status, STATUS_OK);
 }
+
+void addSimulatedThreadChip() {
+    char local_interface[PROP_VALUE_MAX];
+
+    CHECK_GT(property_get("persist.vendor.otsim.local_interface",
+                local_interface, "eth1"), 0);
+
+    int node_id = property_get_int32("ro.boot.openthread_node_id", 0);
+    CHECK_GT(node_id,0);
+
+    std::string url = std::string("spinel+hdlc+forkpty://" \
+            THREADNETWORK_COPROCESSOR_SIMULATION_PATH "?forkpty-arg=-L") \
+                      + local_interface + "&forkpty-arg=" + std::to_string(node_id);
+    addThreadChip(0, url.c_str());
+}
 }
 
 int main(int argc, char* argv[]) {
-    CHECK_GT(argc, 1);
     aidl::android::hardware::threadnetwork::Service service;
 
-    for (int id = 0; id < argc - 1; id++) {
-        addThreadChip(id, argv[id + 1]);
+    if (argc > 1) {
+        for (int id = 0; id < argc - 1; id++) {
+            addThreadChip(id, argv[id + 1]);
+        }
+    } else {
+        struct stat sb;
+
+        CHECK_EQ(stat(THREADNETWORK_COPROCESSOR_SIMULATION_PATH, &sb), 0);
+        CHECK(sb.st_mode & S_IXUSR);
+        addSimulatedThreadChip();
     }
 
     ALOGI("Thread Network HAL is running");

threadnetwork/aidl/default/threadnetwork-service.rc

diff --git a/threadnetwork/aidl/default/threadnetwork-service.rc b/threadnetwork/aidl/default/threadnetwork-service.rc
index 3b889eb..a2ac0f7 100644
--- a/threadnetwork/aidl/default/threadnetwork-service.rc
+++ b/threadnetwork/aidl/default/threadnetwork-service.rc
@@ -1,3 +1,3 @@
-service vendor.threadnetwork_hal /apex/com.android.hardware.threadnetwork/bin/hw/android.hardware.threadnetwork-service spinel+hdlc+forkpty:///apex/com.android.hardware.threadnetwork/bin/ot-rcp?forkpty-arg=1
+service vendor.threadnetwork_hal /apex/com.android.hardware.threadnetwork/bin/hw/android.hardware.threadnetwork-service
     class hal
     user thread_network