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#include <stdio.h>

#include <dlfcn.h>

#include <sys/socket.h>
#include <cutils/sockets.h>


#define VOLD_NAMESPACE "vold"
#define SHARED_LIBRARY "/system/lib/libcutils.so"
#define SHARED_LIB_FUNC "socket"

#define LOAD_SUCCESS 1
#define LOAD_FAILURE 0


typedef int (*ptr_socket_local_client)(const char*, int, int);

ptr_socket_local_client socket_local_client = NULL;


void*
try_find_export(void *handle, const char *name)
{
        if(handle == NULL || name == NULL){
                return NULL;
        }

        void* func = dlsym(handle, name);
        if (func == NULL) {
                return NULL;
        }
        else {
                return func;
        }
        return NULL;
}

int
try_load_libs(void)
{
        void *library = dlopen(SHARED_LIBRARY, RTLD_NOW);

        if (library == NULL) {
                printf("Error while getting file handle.\n");
        }

        socket_local_client = (ptr_socket_local_client)try_find_export(library, SHARED_LIB_FUNC);

        if (socket_local_client == NULL) {
                printf("Dying. Couldn't locate socket functions.\n");
                return 0;
        }

        else {
                printf("All libraries accounted for\n");
                return 1;
        }

        return 0;

}

int
main (int argc, const char * argv[])
{
    // insert code here...
        int sock = -1;
        printf("\n==============================================================\n");
        printf("Vold2 Proof of concept.\nozzeh@manykdepressive.com\n");
        printf("==============================================================\n");
        printf("Trying to assemble the shared libraries.\n");

        if(try_load_libs() != LOAD_SUCCESS) {
                printf("Couldn't load required shared objects for this POC.\n");
                //return 0;
        }
        else {
                printf("Shared objects loaded, attempting to open a client socket\n");
        }

        //sock = socket(AF_INET, SOCK_STREAM, 0);
        socket = socket_local_client(VOLD_NAMESPACE,
                                                                 ANDROID_SOCKET_NAMESPACE_RESERVED,
                                                                 SOCK_STREAM);

        printf("socket returned: %d\n", sock);

        if (socket > 0) {
                printf("Socket accepted!\n");
        }
        else {
                printf("Socket creation failed.\n");
        }

        return 0;
}