예제 #1
0
/* 0: everything ok, -1: error, -2: con closed */
static int connection_handle_read(server *srv, connection *con) {
	int len;
	char *mem = NULL;
	size_t mem_len = 0;
	int toread;

	if (con->srv_socket->is_ssl) {
		return connection_handle_read_ssl(srv, con);
	}

	/* default size for chunks is 4kb; only use bigger chunks if FIONREAD tells
	 *  us more than 4kb is available
	 * if FIONREAD doesn't signal a big chunk we fill the previous buffer
	 *  if it has >= 1kb free
	 */
#if defined(__WIN32)
	chunkqueue_get_memory(con->read_queue, &mem, &mem_len, 0, 4096);

	len = recv(con->fd, mem, mem_len, 0);
#else
	if (ioctl(con->fd, FIONREAD, &toread) || toread == 0 || toread <= 4*1024) {
		if (toread > MAX_READ_LIMIT) toread = MAX_READ_LIMIT;
	} else {
		toread = 4096;
	}
	chunkqueue_get_memory(con->read_queue, &mem, &mem_len, 0, toread);

	len = read(con->fd, mem, mem_len);
#endif

	chunkqueue_use_memory(con->read_queue, len > 0 ? len : 0);

	if (len < 0) {
		con->is_readable = 0;

		if (errno == EAGAIN) return 0;
		if (errno == EINTR) {
			/* we have been interrupted before we could read */
			con->is_readable = 1;
			return 0;
		}

		if (errno != ECONNRESET) {
			/* expected for keep-alive */
			log_error_write(srv, __FILE__, __LINE__, "ssd", "connection closed - read failed: ", strerror(errno), errno);
		}

		connection_set_state(srv, con, CON_STATE_ERROR);

		return -1;
	} else if (len == 0) {
		con->is_readable = 0;
		/* the other end close the connection -> KEEP-ALIVE */

		/* pipelining */

		return -2;
	} else if (len != (ssize_t) mem_len) {
		/* we got less then expected, wait for the next fd-event */

		con->is_readable = 0;
	}

	con->bytes_read += len;
#if 0
	dump_packet(b->ptr, len);
#endif

	return 0;
}
예제 #2
0
/* 0: everything ok, -1: error, -2: con closed */
static int connection_handle_read(server *srv, connection *con) {
	int len;
	buffer *b;
	int toread, read_offset;

	if (con->conf.is_ssl) {
		return connection_handle_read_ssl(srv, con);
	}

	b = (NULL != con->read_queue->last) ? con->read_queue->last->mem : NULL;

	/* default size for chunks is 4kb; only use bigger chunks if FIONREAD tells
	 *  us more than 4kb is available
	 * if FIONREAD doesn't signal a big chunk we fill the previous buffer
	 *  if it has >= 1kb free
	 */
#if defined(__WIN32)
	if (NULL == b || b->size - b->used < 1024) {
		b = chunkqueue_get_append_buffer(con->read_queue);
		buffer_prepare_copy(b, 4 * 1024);
	}

	read_offset = (b->used == 0) ? 0 : b->used - 1;
	len = recv(con->fd, b->ptr + read_offset, b->size - 1 - read_offset, 0);
#else
	if (ioctl(con->fd, FIONREAD, &toread) || toread == 0 || toread <= 4*1024) {
		if (NULL == b || b->size - b->used < 1024) {
			b = chunkqueue_get_append_buffer(con->read_queue);
			buffer_prepare_copy(b, 4 * 1024);
		}
	} else {
		if (toread > MAX_READ_LIMIT) toread = MAX_READ_LIMIT;
		b = chunkqueue_get_append_buffer(con->read_queue);
		buffer_prepare_copy(b, toread + 1);
	}

	read_offset = (b->used == 0) ? 0 : b->used - 1;
	len = read(con->fd, b->ptr + read_offset, b->size - 1 - read_offset);
#endif

	if (len < 0) {
		con->is_readable = 0;

		if (errno == EAGAIN) return 0;
		if (errno == EINTR) {
			/* we have been interrupted before we could read */
			con->is_readable = 1;
			return 0;
		}

		if (errno != ECONNRESET) {
			/* expected for keep-alive */
			log_error_write(srv, __FILE__, __LINE__, "ssd", "connection closed - read failed: ", strerror(errno), errno);
		}

		connection_set_state(srv, con, CON_STATE_ERROR);

		return -1;
	} else if (len == 0) {
		con->is_readable = 0;
		/* the other end close the connection -> KEEP-ALIVE */

		/* pipelining */

		return -2;
	} else if ((size_t)len < b->size - 1) {
		/* we got less then expected, wait for the next fd-event */

		con->is_readable = 0;
	}

	if (b->used > 0) b->used--;
	b->used += len;
	b->ptr[b->used++] = '\0';

	con->bytes_read += len;
#if 0
	dump_packet(b->ptr, len);
#endif

	return 0;
}
예제 #3
0
static int connection_handle_read(server *srv, connection *con) {
	int len;
	buffer *b;
	int toread;

	if (con->conf.is_ssl) {
		return connection_handle_read_ssl(srv, con);
	}

#if defined(__WIN32)
	b = chunkqueue_get_append_buffer(con->read_queue);
	buffer_prepare_copy(b, 4 * 1024);
	len = recv(con->fd, b->ptr, b->size - 1, 0);
#else
	if (ioctl(con->fd, FIONREAD, &toread)) {
		log_error_write(srv, __FILE__, __LINE__, "sd",
				"unexpected end-of-file:",
				con->fd);
		return -1;
	}
	b = chunkqueue_get_append_buffer(con->read_queue);
	buffer_prepare_copy(b, toread + 1);

	len = read(con->fd, b->ptr, b->size - 1);
#endif

	if (len < 0) {
		con->is_readable = 0;

		if (errno == EAGAIN) return 0;
		if (errno == EINTR) {
			/* we have been interrupted before we could read */
			con->is_readable = 1;
			return 0;
		}

		if (errno != ECONNRESET) {
			/* expected for keep-alive */
			log_error_write(srv, __FILE__, __LINE__, "ssd", "connection closed - read failed: ", strerror(errno), errno);
		}

		connection_set_state(srv, con, CON_STATE_ERROR);

		return -1;
	} else if (len == 0) {
		con->is_readable = 0;
		/* the other end close the connection -> KEEP-ALIVE */

		/* pipelining */

		return -2;
	} else if ((size_t)len < b->size - 1) {
		/* we got less then expected, wait for the next fd-event */

		con->is_readable = 0;
	}

	b->used = len;
	b->ptr[b->used++] = '\0';

	con->bytes_read += len;
#if 0
	dump_packet(b->ptr, len);
#endif

	return 0;
}
예제 #4
0
파일: connections.c 프로젝트: ATCP/mtcp
/* 0: everything ok, -1: error, -2: con closed */
static int connection_handle_read(server *srv, connection *con) {
	int len;
	buffer *b;
	int toread, read_offset;

	if (con->conf.is_ssl) {
		return connection_handle_read_ssl(srv, con);
	}

	b = (NULL != con->read_queue->last) ? con->read_queue->last->mem : NULL;

	/* default size for chunks is 4kb; only use bigger chunks if FIONREAD tells
	 *  us more than 4kb is available
	 * if FIONREAD doesn't signal a big chunk we fill the previous buffer
	 *  if it has >= 1kb free
	 */
#if defined(__WIN32)
	if (NULL == b || b->size - b->used < 1024) {
		b = chunkqueue_get_append_buffer(con->read_queue);
		buffer_prepare_copy(b, 4 * 1024);
	}

	read_offset = (b->used == 0) ? 0 : b->used - 1;
	len = recv(con->fd, b->ptr + read_offset, b->size - 1 - read_offset, 0);
#else
#ifdef HAVE_LIBMTCP
	/* toread = MAX_READ_LIMIT; */
	if (mtcp_socket_ioctl(srv->mctx, con->fd, FIONREAD, &toread) 
	    || toread == 0 || toread <= 4*1024) {
#else
	if (ioctl(con->fd, FIONREAD, &toread) || toread == 0 || toread <= 4*1024) {
#endif
		if (NULL == b || b->size - b->used < 1024) {
			b = chunkqueue_get_append_buffer(con->read_queue);
			buffer_prepare_copy(b, 4 * 1024);
		}
	} else {
		if (toread > MAX_READ_LIMIT) toread = MAX_READ_LIMIT;
		b = chunkqueue_get_append_buffer(con->read_queue);
		buffer_prepare_copy(b, toread + 1);
	}

	read_offset = (b->used == 0) ? 0 : b->used - 1;
#ifdef HAVE_LIBMTCP
	len = mtcp_read(srv->mctx, con->fd, b->ptr + read_offset, 
			b->size - 1 - read_offset);
#else
	len = read(con->fd, b->ptr + read_offset, b->size - 1 - read_offset);
#endif
#endif

	if (len < 0) {
		con->is_readable = 0;

		if (errno == EAGAIN) return 0;
		if (errno == EINTR) {
			/* we have been interrupted before we could read */
			con->is_readable = 1;
			return 0;
		}

		if (errno != ECONNRESET) {
			/* expected for keep-alive */
			log_error_write(srv, __FILE__, __LINE__, "ssd", "connection closed - read failed: ", strerror(errno), errno);
		}

		connection_set_state(srv, con, CON_STATE_ERROR);

		return -1;
	} else if (len == 0) {
		con->is_readable = 0;
		/* the other end close the connection -> KEEP-ALIVE */

		/* pipelining */

		return -2;
	} else if ((size_t)len < b->size - 1) {
		/* we got less then expected, wait for the next fd-event */

		con->is_readable = 0;
	}

	if (b->used > 0) b->used--;
	b->used += len;
	b->ptr[b->used++] = '\0';

	con->bytes_read += len;
#if 0
	dump_packet(b->ptr, len);
#endif

	return 0;
}

static int connection_handle_write_prepare(server *srv, connection *con) {
	if (con->mode == DIRECT) {
		/* static files */
		switch(con->request.http_method) {
		case HTTP_METHOD_GET:
		case HTTP_METHOD_POST:
		case HTTP_METHOD_HEAD:
		case HTTP_METHOD_PUT:
		case HTTP_METHOD_PATCH:
		case HTTP_METHOD_MKCOL:
		case HTTP_METHOD_DELETE:
		case HTTP_METHOD_COPY:
		case HTTP_METHOD_MOVE:
		case HTTP_METHOD_PROPFIND:
		case HTTP_METHOD_PROPPATCH:
		case HTTP_METHOD_LOCK:
		case HTTP_METHOD_UNLOCK:
			break;
		case HTTP_METHOD_OPTIONS:
			/*
			 * 400 is coming from the request-parser BEFORE uri.path is set
			 * 403 is from the response handler when noone else catched it
			 *
			 * */
			if ((!con->http_status || con->http_status == 200) && con->uri.path->used &&
			    con->uri.path->ptr[0] != '*') {
				response_header_insert(srv, con, CONST_STR_LEN("Allow"), CONST_STR_LEN("OPTIONS, GET, HEAD, POST"));

				con->response.transfer_encoding &= ~HTTP_TRANSFER_ENCODING_CHUNKED;
				con->parsed_response &= ~HTTP_CONTENT_LENGTH;

				con->http_status = 200;
				con->file_finished = 1;

				chunkqueue_reset(con->write_queue);
			}
			break;
		default:
			switch(con->http_status) {
			case 400: /* bad request */
			case 401: /* authorization required */
			case 414: /* overload request header */
			case 505: /* unknown protocol */
			case 207: /* this was webdav */
				break;
			default:
				con->http_status = 501;
				break;
			}
			break;
		}
	}

	if (con->http_status == 0) {
		con->http_status = 403;
	}

	switch(con->http_status) {
	case 204: /* class: header only */
	case 205:
	case 304:
		/* disable chunked encoding again as we have no body */
		con->response.transfer_encoding &= ~HTTP_TRANSFER_ENCODING_CHUNKED;
		con->parsed_response &= ~HTTP_CONTENT_LENGTH;
		chunkqueue_reset(con->write_queue);

		con->file_finished = 1;
		break;
	default: /* class: header + body */
		if (con->mode != DIRECT) break;

		/* only custom body for 4xx and 5xx */
		if (con->http_status < 400 || con->http_status >= 600) break;

		con->file_finished = 0;

		buffer_reset(con->physical.path);

		/* try to send static errorfile */
		if (!buffer_is_empty(con->conf.errorfile_prefix)) {
			stat_cache_entry *sce = NULL;

			buffer_copy_string_buffer(con->physical.path, con->conf.errorfile_prefix);
			buffer_append_long(con->physical.path, con->http_status);
			buffer_append_string_len(con->physical.path, CONST_STR_LEN(".html"));

			if (HANDLER_ERROR != stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
				con->file_finished = 1;

				http_chunk_append_file(srv, con, con->physical.path, 0, sce->st.st_size);
				response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(sce->content_type));
			}
		}

		if (!con->file_finished) {
			buffer *b;

			buffer_reset(con->physical.path);

			con->file_finished = 1;
			b = chunkqueue_get_append_buffer(con->write_queue);

			/* build default error-page */
			buffer_copy_string_len(b, CONST_STR_LEN(
					   "<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>\n"
					   "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
					   "         \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n"
					   "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\" lang=\"en\">\n"
					   " <head>\n"
					   "  <title>"));
			buffer_append_long(b, con->http_status);
			buffer_append_string_len(b, CONST_STR_LEN(" - "));
			buffer_append_string(b, get_http_status_name(con->http_status));

			buffer_append_string_len(b, CONST_STR_LEN(
					     "</title>\n"
					     " </head>\n"
					     " <body>\n"
					     "  <h1>"));
			buffer_append_long(b, con->http_status);
			buffer_append_string_len(b, CONST_STR_LEN(" - "));
			buffer_append_string(b, get_http_status_name(con->http_status));

			buffer_append_string_len(b, CONST_STR_LEN("</h1>\n"
					     " </body>\n"
					     "</html>\n"
					     ));

			response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("text/html"));
		}
		break;
	}

	if (con->file_finished) {
		/* we have all the content and chunked encoding is not used, set a content-length */

		if ((!(con->parsed_response & HTTP_CONTENT_LENGTH)) &&
		    (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) == 0) {
			off_t qlen = chunkqueue_length(con->write_queue);

			/**
			 * The Content-Length header only can be sent if we have content:
			 * - HEAD doesn't have a content-body (but have a content-length)
			 * - 1xx, 204 and 304 don't have a content-body (RFC 2616 Section 4.3)
			 *
			 * Otherwise generate a Content-Length header as chunked encoding is not 
			 * available
			 */
			if ((con->http_status >= 100 && con->http_status < 200) ||
			    con->http_status == 204 ||
			    con->http_status == 304) {
				data_string *ds;
				/* no Content-Body, no Content-Length */
				if (NULL != (ds = (data_string*) array_get_element(con->response.headers, "Content-Length"))) {
					buffer_reset(ds->value); /* Headers with empty values are ignored for output */
				}
			} else if (qlen > 0 || con->request.http_method != HTTP_METHOD_HEAD) {
				/* qlen = 0 is important for Redirects (301, ...) as they MAY have
				 * a content. Browsers are waiting for a Content otherwise
				 */
				buffer_copy_off_t(srv->tmp_buf, qlen);

				response_header_overwrite(srv, con, CONST_STR_LEN("Content-Length"), CONST_BUF_LEN(srv->tmp_buf));
			}
		}
	} else {
		/**
		 * the file isn't finished yet, but we have all headers
		 *
		 * to get keep-alive we either need:
		 * - Content-Length: ... (HTTP/1.0 and HTTP/1.0) or
		 * - Transfer-Encoding: chunked (HTTP/1.1)
		 */

		if (((con->parsed_response & HTTP_CONTENT_LENGTH) == 0) &&
		    ((con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) == 0)) {
			con->keep_alive = 0;
		}

		/**
		 * if the backend sent a Connection: close, follow the wish
		 *
		 * NOTE: if the backend sent Connection: Keep-Alive, but no Content-Length, we
		 * will close the connection. That's fine. We can always decide the close 
		 * the connection
		 *
		 * FIXME: to be nice we should remove the Connection: ... 
		 */
		if (con->parsed_response & HTTP_CONNECTION) {
			/* a subrequest disable keep-alive although the client wanted it */
			if (con->keep_alive && !con->response.keep_alive) {
				con->keep_alive = 0;
			}
		}
	}

	if (con->request.http_method == HTTP_METHOD_HEAD) {
		/**
		 * a HEAD request has the same as a GET 
		 * without the content
		 */
		con->file_finished = 1;

		chunkqueue_reset(con->write_queue);
		con->response.transfer_encoding &= ~HTTP_TRANSFER_ENCODING_CHUNKED;
	}

	http_response_write_header(srv, con);

	return 0;
}

static int connection_handle_write(server *srv, connection *con) {
	switch(network_write_chunkqueue(srv, con, con->write_queue, MAX_WRITE_LIMIT)) {
	case 0:
		con->write_request_ts = srv->cur_ts;
		if (con->file_finished) {
			connection_set_state(srv, con, CON_STATE_RESPONSE_END);
			joblist_append(srv, con);
		}
		break;
	case -1: /* error on our side */
		log_error_write(srv, __FILE__, __LINE__, "sd",
				"connection closed: write failed on fd", con->fd);
		connection_set_state(srv, con, CON_STATE_ERROR);
		joblist_append(srv, con);
		break;
	case -2: /* remote close */
		connection_set_state(srv, con, CON_STATE_ERROR);
		joblist_append(srv, con);
		break;
	case 1:
		con->write_request_ts = srv->cur_ts;
		con->is_writable = 0;

		/* not finished yet -> WRITE */
		break;
	}

	return 0;
}



connection *connection_init(server *srv) {
	connection *con;

	UNUSED(srv);

	con = calloc(1, sizeof(*con));

	con->fd = 0;
	con->ndx = -1;
	con->fde_ndx = -1;
	con->bytes_written = 0;
	con->bytes_read = 0;
	con->bytes_header = 0;
	con->loops_per_request = 0;

#define CLEAN(x) \
	con->x = buffer_init();

	CLEAN(request.uri);
	CLEAN(request.request_line);
	CLEAN(request.request);
	CLEAN(request.pathinfo);

	CLEAN(request.orig_uri);

	CLEAN(uri.scheme);
	CLEAN(uri.authority);
	CLEAN(uri.path);
	CLEAN(uri.path_raw);
	CLEAN(uri.query);

	CLEAN(physical.doc_root);
	CLEAN(physical.path);
	CLEAN(physical.basedir);
	CLEAN(physical.rel_path);
	CLEAN(physical.etag);
	CLEAN(parse_request);

	CLEAN(authed_user);
	CLEAN(server_name);
	CLEAN(error_handler);
	CLEAN(dst_addr_buf);
#if defined USE_OPENSSL && ! defined OPENSSL_NO_TLSEXT
	CLEAN(tlsext_server_name);
#endif

#undef CLEAN
	con->write_queue = chunkqueue_init();
	con->read_queue = chunkqueue_init();
	con->request_content_queue = chunkqueue_init();
	chunkqueue_set_tempdirs(con->request_content_queue, srv->srvconf.upload_tempdirs);

	con->request.headers      = array_init();
	con->response.headers     = array_init();
	con->environment     = array_init();

	/* init plugin specific connection structures */

	con->plugin_ctx = calloc(1, (srv->plugins.used + 1) * sizeof(void *));

	con->cond_cache = calloc(srv->config_context->used, sizeof(cond_cache_t));
	config_setup_connection(srv, con);

	return con;
}