Simple Socket Client

Here is my code based on the Web server LWIp example :

I have files user.h, network_utilities.h, web_server.c (converted in eth_client.c) and my below file send.c :

#include <stdio.h># include <stdlib.h># include <string.h># include <ctype.h># include <sys/param.h># include <sys/fcntl.h># include "lwip/netif.h"# include "lwip/sockets.h"# include "arch/sys_arch.h"# include "sys/alt_alarm.h"# include "alt_types.h"# include "user.h"# include "io.h"
# ifdef DEBUG
 # include alt_debug.h# else
 # define ALT_DEBUG_ASSERT(a) # endif /* DEBUG */
# define   nbc                   100 // 225 // 200# define   nbl                   200 // 200 // 250# define   fps                   75
# define   SEND_PORT             30    // TCP port number to listen on 
int handle_send(int sock)
{
  char* buffer;
  int i, j;
  int n, a, k;
  buffer=(char *)calloc(nbl*nbc, sizeof(char));
  
  for (i=0; i<nbl; i++) //Ecriture sur nbl lignes
  { 
    for(j=0; j<nbc; j++) // une ligne contient nbc pixels
    {  
       buffer = (char)(j+1);
    }
  }   
  printf(" Buffering data finished\n");
  printf(" Buffer length : %d\n", strlen(buffer));
 
  n = send(sock, buffer, strlen(buffer),0);
  //int lwip_send(int s, void *dataptr, int size, unsigned int flags);
  if (n < 0)
    die_with_error(" error writing to socket\n");
  return n;
}
void send_task()
{
  int sock;
  struct  sockaddr_in addr;
  
  printf(" Creating socket\n");
  if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
    die_with_error(" Listening socket creation failed");
  
  addr.sin_family = AF_INET;
  addr.sin_port = htons(SEND_PORT);
  addr.sin_addr.s_addr = inet_addr("10.0.0.11");
 
  while ((connect(sock,(struct sockaddr *)&addr,sizeof(addr))) < 0)
    printf(" Trying to connect to server\n");
  printf(" Client sending on port %d\n", SEND_PORT);
  
  if ((handle_send(sock)) <0)
      printf(" Transmit failed\n");
  printf(" End of Connection\n");
  close(sock);
}

With that code, i can't send more than a buffer of 100x200 char. And i don't understand why! My pc server seems to correctly receive the data anyway.

So are there parameters to change in LWIP to send a certain amount of data like buffers or stacks?

Thanks for ur future answers.

Regards,

Xavier