-const char gateway_rcs[] = "$Id: gateway.c,v 1.8 2001/09/13 20:10:12 jongfoster Exp $";
+const char gateway_rcs[] = "$Id: gateway.c,v 1.15 2002/03/26 22:29:54 swa Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/gateway.c,v $
* proxy).
*
* Copyright : Written by and Copyright (C) 2001 the SourceForge
- * IJBSWA team. http://ijbswa.sourceforge.net
+ * Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* by and Copyright (C) 1997 Anonymous Coders and
*
* Revisions :
* $Log: gateway.c,v $
+ * Revision 1.15 2002/03/26 22:29:54 swa
+ * we have a new homepage!
+ *
+ * Revision 1.14 2002/03/24 13:25:43 swa
+ * name change related issues
+ *
+ * Revision 1.13 2002/03/13 00:29:59 jongfoster
+ * Killing warnings
+ *
+ * Revision 1.12 2002/03/09 20:03:52 jongfoster
+ * - Making various functions return int rather than size_t.
+ * (Undoing a recent change). Since size_t is unsigned on
+ * Windows, functions like read_socket that return -1 on
+ * error cannot return a size_t.
+ *
+ * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
+ * crashes, and also frequently caused JB to jump to 100%
+ * CPU and stay there. (Because it thought it had just
+ * read ((unsigned)-1) == 4Gb of data...)
+ *
+ * - The signature of write_socket has changed, it now simply
+ * returns success=0/failure=nonzero.
+ *
+ * - Trying to get rid of a few warnings --with-debug on
+ * Windows, I've introduced a new type "jb_socket". This is
+ * used for the socket file descriptors. On Windows, this
+ * is SOCKET (a typedef for unsigned). Everywhere else, it's
+ * an int. The error value can't be -1 any more, so it's
+ * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
+ * Windows it maps to the #define INVALID_SOCKET.)
+ *
+ * - The signature of bind_port has changed.
+ *
+ * Revision 1.11 2002/03/08 17:46:04 jongfoster
+ * Fixing int/size_t warnings
+ *
+ * Revision 1.10 2002/03/07 03:50:19 oes
+ * - Improved handling of failed DNS lookups
+ * - Fixed compiler warnings
+ *
+ * Revision 1.9 2001/10/25 03:40:48 david__schmidt
+ * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
+ * threads to call select() simultaneously. So, it's time to do a real, live,
+ * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
+ * (native). Both versions will work, but using __OS2__ offers multi-threading.
+ *
* Revision 1.8 2001/09/13 20:10:12 jongfoster
* Fixing missing #include under Windows
*
const char gateway_h_rcs[] = GATEWAY_H_VERSION;
-static int socks4_connect(const struct forward_spec * fwd,
- const char * target_host,
- int target_port,
- struct client_state *csp);
+static jb_socket socks4_connect(const struct forward_spec * fwd,
+ const char * target_host,
+ int target_port,
+ struct client_state *csp);
#define SOCKS_REQUEST_GRANTED 90
* a HTTP proxy and/or a SOCKS proxy.
*
* Parameters :
- * 1 : gw = pointer to a gateway structure (such as gw_default)
+ * 1 : fwd = the proxies to use when connecting.
* 2 : http = the http request and apropos headers
* 3 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : -1 => failure, else it is the socket file descriptor.
+ * Returns : JB_INVALID_SOCKET => failure, else it is the socket file descriptor.
*
*********************************************************************/
-int forwarded_connect(const struct forward_spec * fwd,
- struct http_request *http,
- struct client_state *csp)
+jb_socket forwarded_connect(const struct forward_spec * fwd,
+ struct http_request *http,
+ struct client_state *csp)
{
const char * dest_host;
int dest_port;
/* Should never get here */
log_error(LOG_LEVEL_FATAL, "SOCKS4 impossible internal error - bad SOCKS type.");
errno = EINVAL;
- return(-1);
+ return(JB_INVALID_SOCKET);
}
}
* normal (non-SOCKS) socket.
*
* Parameters :
- * 1 : gw = pointer to a gateway structure (such as gw_default)
- * 2 : http = the http request and apropos headers
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : fwd = Specifies the SOCKS proxy to use.
+ * 2 : target_host = The final server to connect to.
+ * 3 : target_port = The final port to connect to.
+ * 4 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : -1 => failure, else a socket file descriptor.
+ * Returns : JB_INVALID_SOCKET => failure, else a socket file descriptor.
*
*********************************************************************/
-static int socks4_connect(const struct forward_spec * fwd,
- const char * target_host,
- int target_port,
- struct client_state *csp)
+static jb_socket socks4_connect(const struct forward_spec * fwd,
+ const char * target_host,
+ int target_port,
+ struct client_state *csp)
{
int web_server_addr;
- unsigned char cbuf[BUFFER_SIZE];
- unsigned char sbuf[BUFFER_SIZE];
+ char cbuf[BUFFER_SIZE];
+ char sbuf[BUFFER_SIZE];
struct socks_op *c = (struct socks_op *)cbuf;
struct socks_reply *s = (struct socks_reply *)sbuf;
- int n;
- int csiz;
- int sfd;
+ size_t n;
+ size_t csiz;
+ jb_socket sfd;
int err = 0;
char *errstr;
if (err)
{
errno = EINVAL;
- return(-1);
+ return(JB_INVALID_SOCKET);
}
/* build a socks request for connection to the web server */
{
case SOCKS_4:
web_server_addr = htonl(resolve_hostname_to_ip(target_host));
+ if (web_server_addr == INADDR_NONE)
+ {
+ log_error(LOG_LEVEL_CONNECT, "socks4_connect: could not resolve target host %s", target_host);
+ return(JB_INVALID_SOCKET);
+ }
break;
case SOCKS_4A:
web_server_addr = 0x00000001;
if (n > sizeof(cbuf))
{
errno = EINVAL;
- return(-1);
+ return(JB_INVALID_SOCKET);
}
- strcpy(((char *)cbuf) + csiz, target_host);
+ strcpy(cbuf + csiz, target_host);
csiz = n;
break;
default:
/* Should never get here */
log_error(LOG_LEVEL_FATAL, "SOCKS4 impossible internal error - bad SOCKS type.");
errno = EINVAL;
- return(-1);
+ return(JB_INVALID_SOCKET);
}
c->vn = 4;
/* pass the request to the socks server */
sfd = connect_to(fwd->gateway_host, fwd->gateway_port, csp);
- if (sfd < 0)
+ if (sfd == JB_INVALID_SOCKET)
{
- return(-1);
+ return(JB_INVALID_SOCKET);
}
- if ((n = write_socket(sfd, (char *)c, csiz)) != csiz)
+ if (write_socket(sfd, (char *)c, csiz))
{
log_error(LOG_LEVEL_CONNECT, "SOCKS4 negotiation write failed...");
close_socket(sfd);
- return(-1);
+ return(JB_INVALID_SOCKET);
}
- if ((n = read_socket(sfd, sbuf, sizeof(sbuf))) != sizeof(*s))
+ if (read_socket(sfd, sbuf, sizeof(sbuf)) != sizeof(*s))
{
log_error(LOG_LEVEL_CONNECT, "SOCKS4 negotiation read failed...");
close_socket(sfd);
- return(-1);
+ return(JB_INVALID_SOCKET);
}
switch (s->cd)
errno = EACCES;
break;
default:
- errstr = (char *) cbuf;
+ errstr = cbuf;
errno = ENOENT;
sprintf(errstr,
"SOCKS request rejected for reason code %d\n", s->cd);
log_error(LOG_LEVEL_CONNECT, "socks4_connect: %s ...", errstr);
close_socket(sfd);
- return(-1);
+ return(JB_INVALID_SOCKET);
}
projects / privoxy.git / blobdiff