Wsrtjtyk

i have written this piece of code to send udp messege.

static void send_message(uv_udp_t* handle, const struct sockaddr* addr, char* message, unsigned int length){

  uv_udp_send_t* send_req = (uv_udp_send_t*)malloc(sizeof(uv_udp_send_t));

  memset(send_req, 0x0, sizeof(uv_udp_send_t));

  uv_buf_t sndbuf = uv_buf_init(message, length);

  int error = uv_udp_send(send_req, handle, (const struct uv_buf_t *)&sndbuf, 1, addr, on_send);

  if(error < 0){

      printf("!! error %sn", uv_strerror(error));

      printf("error code = %dn", error);

  }

}

Here is the main function that calls the above function --

int main(int argc, char** argv) {   



    reply_delayed_t reply;

    reply.code = 0xf;

    reply.load = 7;

    MAKE_BUFFER(wake_buffer, reply);



    send_message(&dsocket_2, wakeup_client_addr, wake_buffer, SIZE_OF_WAKE_UP);

    return 0;

}

There is no compilation error. But at run time on console i find that the function call has returned an error code -22 which says invalid arguments. Can anyone help me to sort this out?

Some details about the arguments passed in send_message() is stated below. i think i should mention these details.

The variables uv_udp_t dsocket_2 and const struct sockaddr* wakeup_client_addris defined in another file var.c and included in this file(wake.c) from a header file(serve_client.h).

var.c

#include <uv.h>

#include "serve_client.h"



const struct sockaddr* wakeup_client_addr = NULL;

uv_udp_t dsocket_2;

serve_client.h

#ifndef ServerClient_H

#define ServerClient_H

#include <uv.h>



extern const struct sockaddr* wakeup_client_addr;

extern uv_udp_t dsocket_2;

#endif

There are two files having a main function (server.c and wake.c) Both the files includes the header file mentioned above. i have created a single executable for wake.c and var.c. And there is another executable including file server.c and var.c.
In server.c binding of dsocket_2 is done and the variable wakeup_client_addr which was NULL at the beginning gets updated with some address which is the client address received in the on_recv callback function of server.c when server receives some udp packet from the client to its dsocket_2.
The executable of server.c is run first and it is working perfectly. Here i assume that whenever the server receives some packet on its dsocket_2 the variable wakeup_client_addr gets updated with the received client address and as dsocket_2 is also already bind, both can be accessed by the executable for wake.c on being run but i get the error code -22 from the uv_udp_send() function stating "invalid arguments".
I am confused that Whether or not the executable of wake.c gets to access the values of wakeup_client_addr and dsocket_2 that the server.c updates on it's execution?**