diff options
Diffstat (limited to 'nuttx/net/uip/uip_igmppoll.c')
| -rwxr-xr-x | nuttx/net/uip/uip_igmppoll.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/nuttx/net/uip/uip_igmppoll.c b/nuttx/net/uip/uip_igmppoll.c new file mode 100755 index 000000000..7ba4b50a0 --- /dev/null +++ b/nuttx/net/uip/uip_igmppoll.c @@ -0,0 +1,161 @@ +/****************************************************************************
+ * net/uip/uip-igmp.h
+ * The definitions in this header file are intended only for internal use
+ * by the NuttX port of the uIP stack.
+ *
+ * Copyright (C) 2010 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 <net/uip/uipopt.h>
+#include <net/uip/uip.h>
+#include <net/uip/uip-arch.h>
+
+#include "uip_internal.h"
+
+#ifdef CONFIG_NET_IGMP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define IGMPBUF ((struct uip_igmphdr_s *)&dev->d_buf[UIP_LLH_LEN])
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: uip_schedsend
+ *
+ * Description:
+ * Construct the .
+ *
+ * Returned Value:
+ * Returns a non-zero value if a IGP message is sent.
+ *
+ * Assumptions:
+ * This function is called from the driver polling logic... probably within
+ * an interrupt handler.
+ *
+ ****************************************************************************/
+
+static inline void uip_schedsend(FAR struct uip_driver_s *dev, FAR struct igmp_group_s *group)
+{
+ uip_ipaddr_t *dest;
+
+ /* IGMP header + IP header + 8 bytes of data */
+
+ if (group->msgid == IGMPv2_MEMBERSHIP_REPORT)
+ {
+ nllvdbg("Send IGMPv2_MEMBERSHIP_REPORT\n");
+ dest = &group->grpaddr;
+ IGMP_STATINCR(uip_stat.igmp.report_sched);
+ uiphdr_ipaddr_copy(IGMPBUF->grpaddr, &group->grpaddr);
+ SET_LASTREPORT(group->flags); /* Remember we were the last to report */
+ }
+ else
+ {
+ nllvdbg("Send IGMP_LEAVE_GROUP\n");
+ DEBUGASSERT(group->msgid == IGMP_LEAVE_GROUP);
+ dest = &g_allrouters;
+ IGMP_STATINCR(uip_stat.igmp.leave_sched);
+ uiphdr_ipaddr_copy(IGMPBUF->grpaddr, &group->grpaddr);
+ }
+
+ uip_igmpsend(dev, dest);
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: uip_igmppoll
+ *
+ * Description:
+ * Poll the groups associated with the device to see if any IGMP messages
+ * are pending transfer.
+ *
+ * Returned Value:
+ * Returns a non-zero value if a IGP message is sent.
+ *
+ * Assumptions:
+ * This function is called from the driver polling logic... probably within
+ * an interrupt handler.
+ *
+ ****************************************************************************/
+
+void uip_igmppoll(FAR struct uip_driver_s *dev)
+{
+ FAR struct igmp_group_s *group;
+
+ /* Setup the poll operation */
+
+ dev->d_appdata = &dev->d_buf[UIP_LLH_LEN + UIP_IPIGMPH_LEN];
+ dev->d_snddata = &dev->d_buf[UIP_LLH_LEN + UIP_IPIGMPH_LEN];
+
+ dev->d_len = 0;
+ dev->d_sndlen = 0;
+
+ /* Check each member of the group */
+
+ for (group = (FAR struct igmp_group_s *)dev->grplist.head; group; group = group->next)
+ {
+ /* Does this member have a pending outgoing message? */
+
+ if (IS_SCHEDMSG(group->flags))
+ {
+ /* Yes, create the IGMP message in the driver buffer */
+
+ uip_schedsend(dev, group);
+
+ /* Mark the message as sent and break out */
+
+ CLR_SCHEDMSG(group->flags);
+ break;
+ }
+ }
+}
+#endif /* CONFIG_NET_IGMP */
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