From b047db596821cbcbe33f3ca638fb78871302143f Mon Sep 17 00:00:00 2001
From: tilaksidduram <tilaksidduram@gmail.com>
Date: Wed, 2 Dec 2015 10:17:26 +0530
Subject: n7100: make ril work

use ril-wrapper to stop libsec-ril from crashing
(based off dmitry-ril for the Nexus S)
---
 n7100.mk                  |  4 +++
 ril-wrapper/Android.mk    |  9 +++++
 ril-wrapper/ril-wrapper.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++
 rootdir/init.target.rc    |  2 +-
 system.prop               |  2 +-
 5 files changed, 101 insertions(+), 2 deletions(-)
 create mode 100644 ril-wrapper/Android.mk
 create mode 100644 ril-wrapper/ril-wrapper.c

diff --git a/n7100.mk b/n7100.mk
index 1f0e323..5da4762 100644
--- a/n7100.mk
+++ b/n7100.mk
@@ -53,6 +53,10 @@ PRODUCT_PACKAGES += \
     libsecril-client-sap \
     SamsungServiceMode
 
+# RIL
+PRODUCT_PACKAGES += \
+    ril-wrapper
+
 # Additional apps
 PRODUCT_PACKAGES += \
     OpenDelta
diff --git a/ril-wrapper/Android.mk b/ril-wrapper/Android.mk
new file mode 100644
index 0000000..698e1d3
--- /dev/null
+++ b/ril-wrapper/Android.mk
@@ -0,0 +1,9 @@
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= ril-wrapper.c
+LOCAL_SHARED_LIBRARIES := liblog libbinder
+LOCAL_MODULE:= ril-wrapper
+
+include $(BUILD_SHARED_LIBRARY)
diff --git a/ril-wrapper/ril-wrapper.c b/ril-wrapper/ril-wrapper.c
new file mode 100644
index 0000000..8371870
--- /dev/null
+++ b/ril-wrapper/ril-wrapper.c
@@ -0,0 +1,86 @@
+#define LOG_TAG "RilWrapper"
+#define RIL_SHLIB
+#include <telephony/ril_cdma_sms.h>
+#include <sys/system_properties.h>
+#include <telephony/librilutils.h>
+#include <cutils/sockets.h>
+#include <telephony/ril.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/cdefs.h>
+#include <utils/Log.h>
+#include <sys/stat.h>
+#include <pthread.h>
+#include <termios.h>
+#include <alloca.h>
+#include <assert.h>
+#include <getopt.h>
+#include <string.h>
+#include <unistd.h>
+#include <dlfcn.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+#define REAL_RIL_NAME				"/system/lib/libsec-ril.so"
+
+
+static RIL_RadioFunctions const *mRealRadioFuncs;
+static const struct RIL_Env *mEnv;
+
+const RIL_RadioFunctions* RIL_Init(const struct RIL_Env *env, int argc, char **argv)
+{
+	RIL_RadioFunctions const* (*fRealRilInit)(const struct RIL_Env *env, int argc, char **argv);
+	static RIL_RadioFunctions rilInfo;
+	void *realRilLibHandle;
+	int i;
+
+
+	//save the env;
+	mEnv = env;
+
+	//get the real RIL
+	realRilLibHandle = dlopen(REAL_RIL_NAME, RTLD_LOCAL);
+	if (!realRilLibHandle) {
+		RLOGE("Failed to load the real RIL '" REAL_RIL_NAME  "': %s\n", dlerror());
+		return NULL;
+	}
+
+	//remove "-c" command line as Samsung's RIL does not understand it - it just barfs instead
+	for (i = 0; i < argc; i++) {
+		if (!strcmp(argv[i], "-c") && i != argc -1) {	//found it
+			memcpy(argv + i, argv + i + 2, sizeof(char*[argc - i - 2]));
+			argc -= 2;
+		}
+	}
+
+	//load the real RIL
+	fRealRilInit = dlsym(realRilLibHandle, "RIL_Init");
+	if (!fRealRilInit) {
+		RLOGE("Failed to find the real RIL's entry point\n");
+		goto out_fail;
+	}
+
+	RLOGD("Calling the real RIL's entry point with %u args\n", argc);
+	for (i = 0; i < argc; i++)
+		RLOGD("  argv[%2d] = '%s'\n", i, argv[i]);
+
+	//try to init the real ril
+	mRealRadioFuncs = fRealRilInit(env, argc, argv);
+	if (!mRealRadioFuncs) {
+		RLOGE("The real RIL's entry point failed\n");
+		goto out_fail;
+	}
+
+	//copy the real RIL's info struct, then replace the onRequest pointer with our own
+	rilInfo = *mRealRadioFuncs;
+
+	RLOGD("Wrapped RIL version is '%s'\n", mRealRadioFuncs->getVersion());
+
+	//we're all good - return to caller
+	return &rilInfo;
+
+out_fail:
+	dlclose(realRilLibHandle);
+	return NULL;
+}
diff --git a/rootdir/init.target.rc b/rootdir/init.target.rc
index fe05cea..3e7ba2c 100644
--- a/rootdir/init.target.rc
+++ b/rootdir/init.target.rc
@@ -1,5 +1,5 @@
 on init
-    export LD_PRELOAD "/system/lib/libsamsung_symbols.so"
+    export LD_SHIM_LIBS /system/lib/libsec-ril.so|libsamsung_symbols.so
     # Vibetonz
     export VIBE_PIPE_PATH /dev/pipes
     mkdir /dev/pipes 0771 shell shell
diff --git a/system.prop b/system.prop
index 47d42de..db6bcfd 100644
--- a/system.prop
+++ b/system.prop
@@ -3,7 +3,7 @@
 #
 
 dalvik.vm.dexopt-data-only=1
-rild.libpath=/system/lib/libsec-ril.so
+rild.libpath=/system/lib/ril-wrapper.so
 rild.libargs=-d /dev/ttyS0
 ro.sf.lcd_density=320
 ro.lcd_min_brightness=20
-- 
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