netcat send file with progress indicator

The following C code compiles to a file nc-send-file, and it will send a file to a raw tcp socket (such as netcat with the command: nc -l -p 8000 > myfile ), with progress indicator for every 64K bytes sent. On Windows, compile it using MinGW the following Makefile:

nc-send-file:nc-send-file.c
        gcc -Wall -O2 -o $@ $^ -s -lws2_32
clean:
        rm -f nc-send-file.exe

C code:

#ifdef WIN32
#include "winsock2.h"
#else
#include "sys/socket.h"
#include "netinet/in.h"
#include "unistd.h"
#endif
#include "stdio.h"

int main(int argc, char**argv)
{
   FILE * fd;
   int sockfd,ret,n;
   struct sockaddr_in servaddr;
   char sendline[1024*64];
   unsigned int totalbytes=0;

   if (argc != 4)
   {
      printf("usage:  client [IP address] [PORT] [File]\n");
      exit(1);
   }
#ifdef WIN32
   WSADATA wsaData;
   if (WSAStartup(MAKEWORD(2, 0), &wsaData) != 0){
    fprintf(stderr, "WSAStartup() failed");
    exit(1);
   }
#endif

   sockfd=socket(AF_INET,SOCK_STREAM,0);

   memset(&servaddr,0,sizeof(servaddr));
   servaddr.sin_family = AF_INET;
   servaddr.sin_addr.s_addr=inet_addr(argv[1]);
   servaddr.sin_port=htons(atoi(argv[2]));

   if (connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr))<0){
    fprintf(stderr,"Error connecting to target.\n");
    return -1;
   }

   fd=fopen(argv[3],"rb");
   if (fd==NULL){
    fprintf(stderr,"Opening file %s error\n",argv[3]);
    return -1;
   }

   while (1){
   ret=fread(sendline, 1, sizeof(sendline),fd);
   if (ret==0){
    if (feof(fd)){
     printf("Finished. Total bytes sent:%u\n",totalbytes);
    }else{
     printf("Error.\n");
    }
    break;
   }
      n=send(sockfd,sendline,ret,0);
   if (n!=ret){
    printf("did not send all in the buffer. expecting %d sent %d exit.\n", ret, n);
    return -1;
   }
   totalbytes+=ret;
   printf("sending %d bytes, total %d bytes\n",ret, totalbytes);
   }
   fclose(fd);
#ifdef WIN32
   closesocket(sockfd);
   WSACleanup();  /* Cleanup Winsock */
#else
   close(sockfd);
#endif
   return 0;
}