Implement cfgs and frd functions from Reisyukaku's ctrulib

source/cfgs.c

@@ -0,0 +1,26 @@
+#include "cfgs.h"
+
+Result cfgsInit() //Already initialized with CFGUinit();
+{
+    return srvGetServiceHandle(&cfgHandle, "cfg:s");
+}
+
+Result cfgsExit()
+{
+    return svcCloseHandle(cfgHandle);
+}
+
+Result cfgsSecureInfoGetSerialNo(char *serial)
+{
+	Result ret = 0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(0x408,1,2); // 0x10082
+	cmdbuf[1] = 0xF;
+	cmdbuf[2] = 12 | (0xF << 4);
+	cmdbuf[3] = (u32)serial;
+
+	if(R_FAILED(ret = svcSendSyncRequest(cfgHandle)))return ret;
+
+	return (Result)cmdbuf[1];
+}

source/cfgs.h

@@ -0,0 +1,7 @@
+#include <3ds.h>
+
+Handle cfgHandle;
+
+Result cfgsInit();
+Result cfgsExit();
+Result cfgsSecureInfoGetSerialNo(char *serial);

source/frd.c

@@ -0,0 +1,58 @@
+#include "frd.h"
+
+Result frdInit(u32 sdkVer)
+{
+	srvGetServiceHandle(&frdHandle, "frd:u");
+	srvGetServiceHandle(&frdHandle, "frd:n");
+    srvGetServiceHandle(&frdHandle, "frd:a");
+	return frdSetClientSdkVersion(sdkVer);
+}
+
+Result frdExit()
+{
+    return svcCloseHandle(frdHandle);
+}
+
+Result frdSetClientSdkVersion(u32 sdkVer)
+{
+    Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(0x32,1,2); // 0x00320042
+    cmdbuf[1] = sdkVer;
+    cmdbuf[2] = 0x20;
+    
+    if(R_FAILED(ret = svcSendSyncRequest(frdHandle)))return ret;
+
+	return (Result)cmdbuf[1];
+}
+
+u64 frdPrincipalIdToFriendCode(u64 *fc, u64 pid)
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(0x24,1,0); // 0x00240040
+    cmdbuf[1] = pid;
+    
+    if(R_FAILED(ret = svcSendSyncRequest(frdHandle)))return ret;
+    
+    *fc = (u64)cmdbuf[2];
+
+	return (Result)cmdbuf[1];
+}
+
+
+Result frdGetMyFriendKey(FriendKey *key)
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(5,0,0); // 0x00050000
+
+    if(R_FAILED(ret = svcSendSyncRequest(frdHandle)))return ret;
+    
+    memcpy(key, &cmdbuf[2], 0x10);
+
+	return (Result)cmdbuf[1];
+}

source/frd.h

@@ -0,0 +1,16 @@
+#include <3ds.h>
+#include <string.h>
+
+Handle frdHandle;
+
+typedef struct
+{
+   u32 principalId;
+   u64 localFriendCode;
+} FriendKey;
+
+Result frdInit();
+Result frdExit();
+Result frdSetClientSdkVersion(u32 sdkVer);
+u64 frdPrincipalIdToFriendCode(u64 *fc, u64 pid);
+Result frdGetMyFriendKey(FriendKey *key);