From 133ffe92fdeb2e36fbd8be867daf5cd3ae5e2cc4 Mon Sep 17 00:00:00 2001
From: thedax <thedax@users.noreply.github.com>
Date: Tue, 4 Jun 2019 10:22:51 -0400
Subject: [PATCH] Implement setsys GetDeviceNickname/SetDeviceNickname (#289)

* Implement setsys(Get/Set)DeviceNickname.

Thanks to @shchmue & @thog for tips on the send/recv buffers!
---
 nx/include/switch/services/set.h | 13 ++++++
 nx/source/services/set.c         | 68 ++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+)

diff --git a/nx/include/switch/services/set.h b/nx/include/switch/services/set.h
index 1f8b41ee..57b9a2b4 100644
--- a/nx/include/switch/services/set.h
+++ b/nx/include/switch/services/set.h
@@ -11,6 +11,7 @@
 #include "../kernel/event.h"
 
 #define SET_MAX_NAME_SIZE 0x48
+#define SET_MAX_NICKNAME_SIZE 0x80
 
 typedef enum {
     ColorSetId_Light=0,
@@ -175,3 +176,15 @@ Result setsysBindFatalDirtyFlagEvent(Event *out);
  * @param flags_1 Pointer to populate with second 64 flags.
  */
 Result setsysGetFatalDirtyFlags(u64 *flags_0, u64 *flags_1);
+
+/**
+ * @brief Gets the system's nickname.
+ * @param nickname Pointer to output the nickname to. (The buffer size needs to be at least 0x80 bytes)
+ */
+Result setsysGetDeviceNickname(char* nickname);
+
+/**
+ * @brief Sets the system's nickname.
+ * @param nickname Pointer to read the nickname from.
+ */
+Result setsysSetDeviceNickname(const char* nickname);
diff --git a/nx/source/services/set.c b/nx/source/services/set.c
index 0772dac5..ad45633e 100644
--- a/nx/source/services/set.c
+++ b/nx/source/services/set.c
@@ -686,3 +686,71 @@ Result setsysGetFatalDirtyFlags(u64 *flags_0, u64 *flags_1) {
 
     return rc;
 }
+
+Result setsysGetDeviceNickname(char* nickname) {
+    IpcCommand c;
+    ipcInitialize(&c);
+
+    ipcAddRecvBuffer(&c, nickname, SET_MAX_NICKNAME_SIZE, BufferType_Normal);
+
+    struct {
+        u64 magic;
+        u64 cmd_id;
+    } *raw;
+
+    raw = ipcPrepareHeader(&c, sizeof(*raw));
+
+    raw->magic = SFCI_MAGIC;
+    raw->cmd_id = 77;
+
+    Result rc = serviceIpcDispatch(&g_setsysSrv);
+
+    if (R_SUCCEEDED(rc)) {
+        IpcParsedCommand r;
+        ipcParse(&r);
+
+        struct {
+            u64 magic;
+            u64 result;
+        } *resp = r.Raw;
+
+        rc = resp->result;
+    }
+
+    return rc;
+}
+
+Result setsysSetDeviceNickname(const char* nickname) {
+    char send_nickname[SET_MAX_NICKNAME_SIZE] = {0};
+    strncpy(send_nickname, nickname, SET_MAX_NICKNAME_SIZE-1);
+
+    IpcCommand c;
+    ipcInitialize(&c);
+    ipcAddSendBuffer(&c, send_nickname, SET_MAX_NICKNAME_SIZE, 0);
+
+    struct {
+        u64 magic;
+        u64 cmd_id;
+    } *raw;
+
+    raw = ipcPrepareHeader(&c, sizeof(*raw));
+
+    raw->magic = SFCI_MAGIC;
+    raw->cmd_id = 78;
+
+    Result rc = serviceIpcDispatch(&g_setsysSrv);
+
+    if (R_SUCCEEDED(rc)) {
+        IpcParsedCommand r;
+        ipcParse(&r);
+
+        struct {
+            u64 magic;
+            u64 result;
+        } *resp = r.Raw;
+
+        rc = resp->result;
+    }
+
+    return rc;
+}