demos/eay/conn.c

   1 /* NOCW */
   2 /* demos/eay/conn.c */
   3
   4 /* A minimal program to connect to a port using the sock4a protocol.
   5  *
   6  * cc -I../../include conn.c -L../.. -lcrypto
   7  */
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include "err.h"
  11 #include "bio.h"
  12 #include "proxy.h"
  13
  14 extern int errno;
  15
  16 int main(argc,argv)
  17 int argc;
  18 char *argv[];
  19         {
  20         PROXY *pxy;
  21         char *host;
  22         char buf[1024*10],*p;
  23         BIO *bio;
  24         int i,len,off,ret=1;
  25
  26         if (argc <= 1)
  27                 host="localhost:4433";
  28         else
  29                 host=argv[1];
  30
  31         /* Lets get nice error messages */
  32         ERR_load_crypto_strings();
  33
  34         /* First, configure proxy settings */
  35         pxy=PROXY_new();
  36         PROXY_add_server(pxy,PROXY_PROTOCOL_SOCKS,"gromit:1080");
  37
  38         bio=BIO_new(BIO_s_socks4a_connect());
  39
  40         BIO_set_conn_hostname(bio,host);
  41         BIO_set_proxies(bio,pxy);
  42         BIO_set_socks_userid(bio,"eay");
  43         BIO_set_nbio(bio,1);
  44
  45         p="GET / HTTP/1.0\r\n\r\n";
  46         len=strlen(p);
  47
  48         off=0;
  49         for (;;)
  50                 {
  51                 i=BIO_write(bio,&(p[off]),len);
  52                 if (i <= 0)
  53                         {
  54                         if (BIO_should_retry(bio))
  55                                 {
  56                                 fprintf(stderr,"write DELAY\n");
  57                                 sleep(1);
  58                                 continue;
  59                                 }
  60                         else
  61                                 {
  62                                 goto err;
  63                                 }
  64                         }
  65                 off+=i;
  66                 len-=i;
  67                 if (len <= 0) break;
  68                 }
  69
  70         for (;;)
  71                 {
  72                 i=BIO_read(bio,buf,sizeof(buf));
  73                 if (i == 0) break;
  74                 if (i < 0)
  75                         {
  76                         if (BIO_should_retry(bio))
  77                                 {
  78                                 fprintf(stderr,"read DELAY\n");
  79                                 sleep(1);
  80                                 continue;
  81                                 }
  82                         goto err;
  83                         }
  84                 fwrite(buf,1,i,stdout);
  85                 }
  86
  87         ret=1;
  88
  89         if (0)
  90                 {
  91 err:
  92                 if (ERR_peek_error() == 0) /* system call error */
  93                         {
  94                         fprintf(stderr,"errno=%d ",errno);
  95                         perror("error");
  96                         }
  97                 else
  98                         ERR_print_errors_fp(stderr);
  99                 }
 100         BIO_free_all(bio);
 101         if (pxy != NULL) PROXY_free(pxy);
 102         exit(!ret);
 103         return(ret);
 104         }
 105