ANSI C socket libraries

I want to implement a Socket Server on a Symbian mobile phone using standard library. I have my ethernet connection configured as DHCP.

-----------
 CODE N. 1
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When I use the functions socket() + bind() + listen() + accept() + recv() NO IP ADDRESS IS ASSIGNED TO THE RUNNING EMULATOR, to obtain an IP address I workarounded the problem in the following way:
 - I opened a client connection (on a separate socket) before opening the server socket.
 - I sniffed my network to see wich IP address is assigned to the emulator
This seems very strange to me, anyone have some suggestions ?


-----------
 CODE N. 2
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I tried to use the function recvfrom() or the function read() to read data from a RAW socket.
My code (fully listed below) contains:
   --------------------------------------------------------------------------------
   SockId = socket(AF_INET, SOCK_RAW, IPPROTO_TCP);
   bytes_received = recvfrom(SockId, buffer, sizeof(buffer), 0,(struct sockaddr *)&from, &fromlen);

   or alternatively
   bytes_received = read (SockId, &buffer, sizeof (buffer));
   ---------------------------------------------------------------------------------
In both cases, at runtime, I get an "Invalid argument" error message on recvfrom() or on read() function.
The same program on linux machines works perfectly


Can someone help me ?
Thanks in advance
      Mario



Following you will find my code

=============================================
 CODE LISTENING N. 1
=============================================
//    Simple test program: A socket server on port 1600

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>


/* ------------------
    Costants
   ------------------ */
// Listening port
unsigned short int Myport = 1600;

// Data used by a client connection just to obtain an IP through DHCP
unsigned short int Dummyport = 16;
char DummyipAddress[20] = "192.168.10.110";

/* ------------------
    Variables
   ------------------ */
int SockId;
int SockId_Son;

int Ind_sock_length;
struct sockaddr_in socketAddress;


unsigned char buffer[50];
int lenbuffer;


// ----------------------------------------------
// Opening a client connection (even to a non
// existing ip address) force the Symbian emulator
// to request an IP through DHCP so that an
// IP address will be assigned to the emulator
// ----------------------------------------------
void OpenClientConnection()
{

int SockClient;
struct sockaddr_in socketClient;

int lenbuffcli;

  // Options
  socketClient.sin_family      = AF_INET;
  socketClient.sin_port        = htons(Dummyport);
  socketClient.sin_addr.s_addr = inet_addr(DummyipAddress);

  lenbuffcli=3;

  printf ("\nConn CLIENT DHCP\n");

  /* Socket Opening */
  if((SockClient = socket(AF_INET,SOCK_STREAM,0))<0)
  {
    printf("\nERRORE Creazione del socket |%s|",strerror(errno));
    fflush (stdout);
  }

  /* Connect -- with this instruction the DHCP assign me an IP Address */
  if (connect(SockClient,(struct sockaddr *)&socketClient,sizeof(socketClient)) >= 0)
  {
    close (SockClient);
  }

}


//    M A I N
int main ()
{
int result;
int count;


  // Workaround to obtain a DHCP from my network --------
  OpenClientConnection();
  // ----------------------------------------------------


  SockId = socket (AF_INET,SOCK_STREAM,IPPROTO_TCP);
  if(SockId == -1)
  {
    printf("\nERROR function socket |%s|",strerror(errno));
    return (1);
  }
  else
    printf("\nfunction socket OK");

  socketAddress.sin_family = AF_INET;
  socketAddress.sin_port = htons(Myport);
  socketAddress.sin_addr.s_addr = htonl(INADDR_ANY);


  /* Bind */
  result = bind(SockId,(struct sockaddr *)&socketAddress,sizeof(socketAddress));
  if(result == -1)
  {
    printf("\nERROR function bind |%s|",strerror(errno));
    return (1);
  }
  else
  {
    printf("\nfunction bind   OK");
    fflush (stdout);
  }


  /* Listen */
  result = listen(SockId,1);

  if(result == -1)
  {
    printf("\nERROR function listen |%s|",strerror(errno));
    return (1);
  }
  else
  {
    printf("\nfunction listen OK");
    fflush (stdout);
  }

  Ind_sock_length = sizeof(socketAddress);

  printf ("\n\nstart Receiving ...\n");
  fflush (stdout);

  for (count=1; ;count++)
  {
    SockId_Son = accept(SockId, (struct sockaddr *)&socketAddress,(size_t *)&Ind_sock_length);

    printf("\nfunction accept OK");
    fflush (stdout);

    result = recv(SockId_Son, (char *)&buffer[0], 100,0);

    printf("\nfunction recv OK result = %d",result);
    fflush (stdout);

    if(result > 0)
    {
      printf ("\n%4.4d Received %d bytes",count,result);
      fflush (stdout);
    }
    else
    {
      exit (1);
      printf("\n%4.4d ERROR function recv |%s|",count,strerror(errno));
      fflush(stdout);
    }

    close (SockId_Son);
  }

}


============================================
 CODE LISTENING N. 2
============================================

#include <stdio.h>

#include <stdlib.h>
#include <errno.h>

#include <arpa\inet.h>
#include <netinet\in.h>
#include <sys\socket.h>


// Variables
int SockId;
unsigned int fromlen;
int bytes_received;
char buffer[65535];
struct sockaddr_in from;
struct ip  *ip;
struct tcp *tcp;
int k;


int main ()
{

  printf ("\nSTART\n");
  fflush (stdout);

  SockId = socket(AF_INET, SOCK_RAW, IPPROTO_TCP);

  printf ("\nfunction socket OK %d",SockId);
  fflush (stdout);

  fromlen = sizeof (from);

  for(k=0;k<10;k++)
  {
 // ****************************************************
// HERE I GET AN ERROR BOTH IF I USE
// RECVFROM() OR IF I USE READ()
// *****************************************************
    //bytes_received = recvfrom(SockId, buffer, sizeof(buffer), 0,(struct sockaddr *)&from, &fromlen);

    bytes_received = read (SockId, &buffer, sizeof (buffer));

    if (bytes_received >= 0)
    {
      printf ("\nbytes_received %d",bytes_received);
    }
    else
    {
      printf ("\nERROR recvfrom |%s|",strerror(errno));
      exit (1);
    }
  }
   return 0;
}