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conn.c

/* NOCW */
/* demos/eay/conn.c */

/* A minimal program to connect to a port using the sock4a protocol.
 *
 * cc -I../../include conn.c -L../.. -lcrypto
 */
#include <stdio.h>
#include <stdlib.h>
#include <openssl/err.h>
#include <openssl/bio.h>
/* #include "proxy.h" */

extern int errno;

int main(argc,argv)
int argc;
char *argv[];
      {
      PROXY *pxy;
      char *host;
      char buf[1024*10],*p;
      BIO *bio;
      int i,len,off,ret=1;

      if (argc <= 1)
            host="localhost:4433";
      else
            host=argv[1];

      /* Lets get nice error messages */
      ERR_load_crypto_strings();

      /* First, configure proxy settings */
      pxy=PROXY_new();
      PROXY_add_server(pxy,PROXY_PROTOCOL_SOCKS,"gromit:1080");

      bio=BIO_new(BIO_s_socks4a_connect());

      BIO_set_conn_hostname(bio,host);
      BIO_set_proxies(bio,pxy);
      BIO_set_socks_userid(bio,"eay");
      BIO_set_nbio(bio,1);

      p="GET / HTTP/1.0\r\n\r\n";
      len=strlen(p);

      off=0;
      for (;;)
            {
            i=BIO_write(bio,&(p[off]),len);
            if (i <= 0)
                  {
                  if (BIO_should_retry(bio))
                        {
                        fprintf(stderr,"write DELAY\n");
                        sleep(1);
                        continue;
                        }
                  else
                        {
                        goto err;
                        }
                  }
            off+=i;
            len-=i;
            if (len <= 0) break;
            }

      for (;;)
            {
            i=BIO_read(bio,buf,sizeof(buf));
            if (i == 0) break;
            if (i < 0)
                  {
                  if (BIO_should_retry(bio))
                        {
                        fprintf(stderr,"read DELAY\n");
                        sleep(1);
                        continue;
                        }
                  goto err;
                  }
            fwrite(buf,1,i,stdout);
            }

      ret=1;

      if (0)
            {
err:
            if (ERR_peek_error() == 0) /* system call error */
                  {
                  fprintf(stderr,"errno=%d ",errno);
                  perror("error");
                  }
            else
                  ERR_print_errors_fp(stderr);
            }
      BIO_free_all(bio);
      if (pxy != NULL) PROXY_free(pxy);
      exit(!ret);
      return(ret);
      }


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