diff options
Diffstat (limited to 'nuttx/net/uip/uip_igmpmsg.c')
-rwxr-xr-x | nuttx/net/uip/uip_igmpmsg.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/nuttx/net/uip/uip_igmpmsg.c b/nuttx/net/uip/uip_igmpmsg.c new file mode 100755 index 000000000..9ea3daa4e --- /dev/null +++ b/nuttx/net/uip/uip_igmpmsg.c @@ -0,0 +1,139 @@ +/**************************************************************************** + * net/uip/uip_igmpmgs.c + * + * Copyright (C) 2010-2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * The NuttX implementation of IGMP was inspired by the IGMP add-on for the + * lwIP TCP/IP stack by Steve Reynolds: + * + * Copyright (c) 2002 CITEL Technologies Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <assert.h> +#include <debug.h> + +#include <nuttx/net/uip/uipopt.h> +#include <nuttx/net/uip/uip.h> +#include <nuttx/net/uip/uip-igmp.h> + +#include "uip_internal.h" + +#ifdef CONFIG_NET_IGMP + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: uip_igmpschedmsg + * + * Description: + * Schedule a message to be send at the next driver polling interval. + * + * Assumptions: + * This function may be called in most any context. + * + ****************************************************************************/ + +void uip_igmpschedmsg(FAR struct igmp_group_s *group, uint8_t msgid) +{ + uip_lock_t flags; + + /* The following should be atomic */ + + flags = uip_lock(); + DEBUGASSERT(!IS_SCHEDMSG(group->flags)); + group->msgid = msgid; + SET_SCHEDMSG(group->flags); + uip_unlock(flags); +} + +/**************************************************************************** + * Name: uip_igmpwaitmsg + * + * Description: + * Schedule a message to be send at the next driver polling interval and + * block, waiting for the message to be sent. + * + * Assumptions: + * This function cannot be called from an interrupt handler (if you try it, + * uip_lockedwait will assert). + * + ****************************************************************************/ + +void uip_igmpwaitmsg(FAR struct igmp_group_s *group, uint8_t msgid) +{ + uip_lock_t flags; + + /* Schedule to send the message */ + + flags = uip_lock(); + DEBUGASSERT(!IS_WAITMSG(group->flags)); + SET_WAITMSG(group->flags); + uip_igmpschedmsg(group, msgid); + + /* Then wait for the message to be sent */ + + while (IS_SCHEDMSG(group->flags)) + { + /* Wait for the semaphore to be posted */ + + while (uip_lockedwait(&group->sem) != 0) + { + /* The only error that should occur from uip_lockedwait() is if + * the wait is awakened by a signal. + */ + + ASSERT(errno == EINTR); + } + } + + /* The message has been sent and we are no longer waiting */ + + CLR_WAITMSG(group->flags); + uip_unlock(flags); +} + +#endif /* CONFIG_NET_IGMP */ |