-/*
- * Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file send_common.c Functions used by more than one paraslash sender. */
/** Clients will be kicked if there are more than that many bytes pending. */
#define MAX_CQ_BYTES 40000
-/**
- * Open a passive socket of given layer4 type.
- *
- * Set the resulting file descriptor to nonblocking mode and add it to the list
- * of fds that are being closed in the child process when the server calls
- * fork().
- *
- * \param l4type The transport-layer protocol.
- * \param port The port number.
- *
- * \return The listening fd on success, negative on errors.
- */
-static int open_sender(unsigned l4type, int port)
-{
- int fd, ret = para_listen_simple(l4type, port);
-
- if (ret < 0)
- return ret;
- fd = ret;
- ret = mark_fd_nonblocking(fd);
- if (ret < 0) {
- close(fd);
- return ret;
- }
- add_close_on_fork_list(fd);
- return fd;
-}
-
/**
* Shut down a client connected to a paraslash sender.
*
* Activate a paraslash sender.
*
* \param ss The sender to activate.
- * \param protocol The symbolic name of the transport-layer protocol.
+ * \param protocol layer4 type (IPPROTO_TCP or IPPROTO_DCCP).
*
- * \return Standard.
+ * This opens a passive socket of given layer4 type, sets the resulting file
+ * descriptor to nonblocking mode and adds it to the close on fork list.
+ *
+ * Errors are logged but otherwise ignored.
*/
-int generic_com_on(struct sender_status *ss, unsigned protocol)
+void generic_com_on(struct sender_status *ss, unsigned protocol)
{
- int ret;
+ int fd, ret;
if (ss->listen_fd >= 0)
- return 1;
- ret = open_sender(protocol, ss->port);
- if (ret < 0)
- return ret;
- ss->listen_fd = ret;
- return 1;
+ return;
+ ret = para_listen_simple(protocol, ss->port);
+ if (ret < 0) {
+ PARA_ERROR_LOG("could not listen on port %d: %s\n", ss->port,
+ para_strerror(-ret));
+ return;
+ }
+ fd = ret;
+ ret = mark_fd_nonblocking(fd);
+ if (ret < 0) {
+ PARA_ERROR_LOG("could not set %s socket fd for port %d to "
+ "nonblocking mode: %s\n",
+ protocol == IPPROTO_TCP? "TCP" : "DCCP", ss->port,
+ para_strerror(-ret));
+ close(fd);
+ return;
+ }
+ add_close_on_fork_list(fd);
+ ss->listen_fd = fd;
+ return;
}
/**
* \param ss The sender whose listening fd is ready for reading.
* \param rfds Passed to para_accept(),
*
- * This must be called only if the socket fd of \a ss is ready for reading. It
- * calls para_accept() to accept the connection and performs the following
- * actions on the resulting file descriptor \a fd:
+ * This calls para_accept() and performs the following actions on the resulting
+ * file descriptor fd:
*
* - Checks whether the maximal number of connections are exceeded.
* - Sets \a fd to nonblocking mode.