From 5af3dd73de61a2ce0c62869257d29d2b332bc410 Mon Sep 17 00:00:00 2001
From: Michael Theall <pigman46@gmail.com>
Date: Thu, 21 Jan 2016 19:21:43 -0600
Subject: [PATCH] Add SOCU_GetIPInfo

---
 libctru/include/3ds/services/soc.h          |  7 +++
 libctru/source/services/soc/soc_getipinfo.c | 61 +++++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 libctru/source/services/soc/soc_getipinfo.c

diff --git a/libctru/include/3ds/services/soc.h b/libctru/include/3ds/services/soc.h
index bec38e7..dfb39d6 100644
--- a/libctru/include/3ds/services/soc.h
+++ b/libctru/include/3ds/services/soc.h
@@ -5,6 +5,7 @@
  * After initializing this service you will be able to use system calls from netdb.h, sys/socket.h etc.
  */
 #pragma once
+#include <netinet/in.h>
 
 /**
  * @brief Initializes the SOC service.
@@ -33,3 +34,9 @@ int gethostname(char *name, size_t namelen);
 int SOCU_ShutdownSockets();
 
 int SOCU_CloseSockets();
+
+/**
+ * @brief Gets the system's IP address, netmask, and subnet broadcast
+ * @return error
+ */
+int SOCU_GetIPInfo(struct in_addr *ip, struct in_addr *netmask, struct in_addr *broadcast);
diff --git a/libctru/source/services/soc/soc_getipinfo.c b/libctru/source/services/soc/soc_getipinfo.c
new file mode 100644
index 0000000..d425503
--- /dev/null
+++ b/libctru/source/services/soc/soc_getipinfo.c
@@ -0,0 +1,61 @@
+#include "soc_common.h"
+#include <3ds/ipc.h>
+#include <3ds/result.h>
+
+typedef struct
+{
+  struct in_addr ip;
+  struct in_addr netmask;
+  struct in_addr broadcast;
+} SOCU_IPInfo_t;
+
+int SOCU_GetIPInfo(struct in_addr *ip, struct in_addr *netmask, struct in_addr *broadcast)
+{
+	int             i, ret;
+	u32             *cmdbuf     = getThreadCommandBuffer();
+	u32             *staticbufs = getThreadStaticBuffers();
+	u32             saved_threadstorage[2];
+	SOCU_IPInfo_t info;
+
+	cmdbuf[0] = IPC_MakeHeader(0x1A,3,0); //0x1A00C0
+	cmdbuf[1] = 0xFFFE;
+	cmdbuf[2] = 0x4003;
+	cmdbuf[3] = sizeof(info);
+
+	// Save the thread storage values
+	for(i = 0 ; i < 2 ; ++i)
+		saved_threadstorage[i] = staticbufs[i];
+
+	staticbufs[0] = IPC_Desc_StaticBuffer(sizeof(info), 0);
+	staticbufs[1] = (u32)&info;
+
+	ret = svcSendSyncRequest(SOCU_handle);
+
+	// Restore the thread storage values
+	for(i = 0 ; i < 2 ; ++i)
+		staticbufs[i] = saved_threadstorage[i];
+
+	if(R_FAILED(ret)) {
+		errno = SYNC_ERROR;
+		return ret;
+	}
+
+	ret = cmdbuf[1];
+	if(R_FAILED(ret)) {
+		errno = SYNC_ERROR;
+		return ret;
+	}
+	if(cmdbuf[2] != 0)
+	{
+		return cmdbuf[2];
+	}
+
+	if(ip != NULL)
+		*ip = info.ip;
+	if(netmask != NULL)
+		*netmask = info.netmask;
+	if(broadcast != NULL)
+		*broadcast = info.broadcast;
+
+	return 0;
+}