/*  Assignment #5: stateless server     	Name:  Don Southwell 
    Date Due:  November 13th, 2002                    Class:  CPS670

    Program Description:  This program is the client portion 
    of the filecopy with sockets assignment.  Program utilizes the passed
    UDP Datagram socket to request a file from a remote source server. 
    Protocol utilized will send a request that contains:  offset bytes in
    file, the number of bytes to read, and the absolute filepath of the 
    file to read from.  Server will respond to request by returning the     
    number of bytes read and a 1494 byte data packet or (-1) for bytes read 
    value if the file does not exist.  A value of bytes read less than the      
    packet size will determine end of file.  The program will retry a request
    three times and then sleep for a specified duration if server response
    is still not received.  If after two sleep cycles there is still no
    response from the server, the program will cleanup and exit.
  
    Some code snipets/sections used are copied from class examples per
    Dr. Rattan's cps670 class.

    Errors Handled:
    
    a) Error in setting up signal handler.
    b) Error in creation of local destination file.
    c) Error in sending file buffer request remote server.
    d) Error in receiving server response to file request.
    e) Error in server request timing out (alarm and sleep).
    f) Error in receipt from packet from incorrect server.

    Functions Used: (encapsulated within their own source files)

    void serr(char *)    
    void copybyte(char *, char *, int)    
    void sighandc(int) 
*/

#include "inet.h"

#define BUFSIZE 1496      
#define PMODE	0755

void serr(char *); 
void sighandc(int);
int initrcon(char *, char *);
int checkargs(int, char *[]);

struct sockaddr_in fservaddr;
struct files {
  char filepath[1025];
  char operation[5];
  long offset;
  char *usage;
  char *eoflg;
} filetab[30];

int main(int argc, char *argv[])
{
  struct sigaction act, oact;
  int sock;
  short sport;

  act.sa_handler = sighandc;
  sigemptyset(&act.sa_mask);
  act.sa_flags = 0;
  if (sigaction(SIGINT, &act, &oact) < 0) serr("Sigaction failed...");

  /*  check command line args  */
  if (checkargs(argc, argv) == -1) exit(-1);

  if ((sport = atoi(argv[2])) <= 0) serr("client: bad port...");
 
  /*  initialize the file table  */
  printf("this is where I would initialize the file table..");

  /*  initialize the socket connection  */
  if ((sock = initrcon(argv[1], argv[2])) == -1) serr("problem with socket..");
  printf("sock = %d\n", sock);

  /*  call doreads to process file reads from table  */
  printf("stub: doread");

  close(sock);
  exit(0);
}