#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <asm/ioctls.h>
#include <linux/sockios.h>
#include <netinet/in.h>
#include <netinet/sctp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/poll.h>
#include <sys/time.h>
#include <signal.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>

int nodelay = 1;
#define HOST_BUF_LEN 256
int init_client(int port, char *ip) {
  int sd;
  static struct sockaddr_in addr ;
  addr.sin_family = AF_INET;
  addr.sin_port = htons(port);
  addr.sin_addr.s_addr = inet_addr(ip);
  if ((sd = socket(PF_INET, SOCK_SEQPACKET, IPPROTO_SCTP)) < 0)
  {
    perror("socket");
  }

  if(connect(sd,(struct sockaddr *)&addr,sizeof(addr)) < 0) {
    perror("connect");
    return(-1);
  }
  if (fcntl(sd, F_SETFL, O_NONBLOCK) < 0) {
    perror("fcntl");
    goto errout;
  }
  if (setsockopt(sd, SOL_SCTP, SCTP_NODELAY, &nodelay, sizeof(nodelay)) < 0) {
    perror("setsockopt");
    goto errout;
  }
  return sd;
  errout:
    close(sd);
    return(-1);
  }

void print_param(int sd) {
  char buf[HOST_BUF_LEN];
  int read_b;
  while((read_b = fread(buf, 1, sizeof(buf), stdin))){
    if ((send(sd, buf, read_b, 0)) == -1) {
      perror("send");
    }

  }
  perror("");

  close (sd);
}

int usage(int argc){
  if(argc != 3) {
    printf ("usage: client dest_ip\n");
    return (-1);
  }
  return 1;
}

int main(int argc,char *argv[]) {
  if(usage(argc) > 0 ){
  int sock;
  if ((sock = init_client(atoi(argv[1]), argv[2])))
    print_param(sock) ;
  }
  return 1;

}