Exemplo n.º 1
0
int create_http_socket(char* http_request, sock_t* server_sock, sock_t* client_sock, ssl_context_t* ssl_ctx) 
{
	http_request_t http_infos;
	int retcode;
	char* err;
	char sport[7] = {0, };

	err = NULL;
	proxenet_xzero(&http_infos, sizeof(http_request_t));
	http_infos.method = NULL;
	http_infos.hostname = NULL;
	http_infos.request_uri = NULL;
	
	/* get target from string and establish client socket to dest */
	if (get_url_information(http_request, &http_infos) == false) {
		xlog(LOG_ERROR, "%s\n", "Failed to extract valid parameters from URL.");
		return -1;
	}

	ssl_ctx->use_ssl = http_infos.is_ssl;
	snprintf(sport, 6, "%d", http_infos.port);
	
	retcode = create_connect_socket(http_infos.hostname, sport, &err);
	if (retcode < 0) {
		if (err)
			generic_http_error_page(*server_sock, err);
		else
			generic_http_error_page(*server_sock, "Unknown error in <i>create_connect_socket</i>");
		
		retcode = -1;
		
	} else {
		*client_sock = retcode;
		
		/* if ssl, set up ssl interception */
		if (http_infos.is_ssl) {
			
			/* 1. set up proxy->server ssl session */ 
			if(proxenet_ssl_init_client_context(&(ssl_ctx->client)) < 0) {
				retcode = -1;
				goto http_sock_end;
			}

			proxenet_ssl_wrap_socket(&(ssl_ctx->client.context), client_sock);
			if (proxenet_ssl_handshake(&(ssl_ctx->client.context)) < 0) {
				xlog(LOG_ERROR, "%s\n", "proxy->server: handshake");
				retcode = -1;
				goto http_sock_end;
			}
#ifdef DEBUG
			xlog(LOG_DEBUG, "%s\n", "SSL handshake with server done");
#endif
			proxenet_write(*server_sock,
				       "HTTP/1.0 200 Connection established\r\n\r\n",
				       39);
			
			/* 2.set up proxy->browser ssl session  */
			if(proxenet_ssl_init_server_context(&(ssl_ctx->server)) < 0) {
				retcode = -1;
				goto http_sock_end;
			}

			proxenet_ssl_wrap_socket(&(ssl_ctx->server.context), server_sock);
			if (proxenet_ssl_handshake(&(ssl_ctx->server.context)) < 0) {
				xlog(LOG_ERROR, "handshake proxy->client '%s:%d' failed\n",
				     http_infos.hostname, http_infos.port);
				retcode = -1;
				goto http_sock_end;
			}
			
#ifdef DEBUG
			xlog(LOG_DEBUG, "%s\n", "SSL Handshake with client done");
#endif
		}
	}
	
http_sock_end:
	proxenet_xfree(http_infos.method);
	proxenet_xfree(http_infos.hostname);
	proxenet_xfree(http_infos.request_uri);
	
	return retcode;
}
Exemplo n.º 2
0
/**
 * Establish a connection from proxenet -> server. If proxy forwarding configured, then process
 * request to other proxy.
 * 
 */
int create_http_socket(request_t* req, sock_t* server_sock, sock_t* client_sock, ssl_context_t* ssl_ctx) 
{
	int retcode;
	char *host, *port;
	char sport[6] = {0, };
	http_request_t* http_infos = &req->http_infos;
	bool use_proxy = (cfg->proxy.host != NULL) ;

	/* get target from string and establish client socket to dest */
	if (get_url_information(req->data, http_infos) == false) {
		xlog(LOG_ERROR, "%s\n", "Failed to extract valid parameters from URL.");
		return -1;
	}

	
#ifdef DEBUG
	char* full_uri = get_request_full_uri(req);
	xlog(LOG_DEBUG, "URL: %s\n", full_uri);
	proxenet_xfree(full_uri);
#endif
	
	ssl_ctx->use_ssl = http_infos->is_ssl;
	snprintf(sport, 5, "%u", http_infos->port);

	/* do we forward to another proxy ? */
	if (use_proxy) {
		host = cfg->proxy.host;
		port = cfg->proxy.port;
		
	} else {
		host = http_infos->hostname;
		port = sport;
	}
	
	retcode = create_connect_socket(host, port);
	if (retcode < 0) {
		if (errno)
			generic_http_error_page(*server_sock, strerror(errno));
		else
			generic_http_error_page(*server_sock, "Unknown error in <i>create_connect_socket</i>");
		
		retcode = -1;
		
	} else {
		*client_sock = retcode;
		
		/* if ssl, set up ssl interception */
		if (http_infos->is_ssl) {

			if (use_proxy) {
				char *connect_buf = NULL;
				
				/* 0. set up proxy->proxy ssl session (i.e. forward CONNECT request) */ 
				retcode = proxenet_write(*client_sock, req->data, req->size);
				if (retcode < 0) {
					xlog(LOG_ERROR, "%s failed to CONNECT to proxy\n", PROGNAME);
					return -1;
				}

				/* read response */
				retcode = proxenet_read_all(*client_sock, &connect_buf, NULL);
				if (retcode < 0) {
					xlog(LOG_ERROR, "%s Failed to read from proxy\n", PROGNAME);
					return -1;
				}

				/* expect HTTP 200 */
				if (   (strncmp(connect_buf, "HTTP/1.0 200", 12) != 0) 
				    && (strncmp(connect_buf, "HTTP/1.1 200", 12) != 0)) {
					xlog(LOG_ERROR, "%s->proxy: bad HTTP version\n", PROGNAME);
					if (cfg->verbose)
							xlog(LOG_ERROR, "Received %s\n", connect_buf);
					
					return -1;
				}
			}

			/* 1. set up proxy->server ssl session */ 
			if(proxenet_ssl_init_client_context(&(ssl_ctx->client)) < 0) {
				return -1;
			}
			
			proxenet_ssl_wrap_socket(&(ssl_ctx->client.context), client_sock);
			if (proxenet_ssl_handshake(&(ssl_ctx->client.context)) < 0) {
				xlog(LOG_ERROR, "%s->server: handshake\n", PROGNAME);
				return -1;
			}

#ifdef DEBUG
			xlog(LOG_DEBUG, "%s %d %d\n", "SSL handshake with server done",
			     *client_sock,
			     *server_sock);
#endif
			if (proxenet_write(*server_sock,
					   "HTTP/1.0 200 Connection established\r\n\r\n",
					   39) < 0){
				return -1;
			}

			/* 2. set up proxy->browser ssl session  */
			if(proxenet_ssl_init_server_context(&(ssl_ctx->server)) < 0) {
				return -1;
			}

			proxenet_ssl_wrap_socket(&(ssl_ctx->server.context), server_sock);
			if (proxenet_ssl_handshake(&(ssl_ctx->server.context)) < 0) {
				xlog(LOG_ERROR, "handshake %s->client '%s:%d' failed\n",
				     PROGNAME, http_infos->hostname, http_infos->port);
				return -1;
			}

#ifdef DEBUG
			xlog(LOG_DEBUG, "%s\n", "SSL Handshake with client done");
#endif
		}
	}
	
	
	return retcode;
}