conn.c

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/* 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);
    }