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/****************************************************************************
* include/nuttx/net/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, 2012, 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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.
*
****************************************************************************/
#ifndef __INCLUDE_NUTTX_NET_IGMP_H
#define __INCLUDE_NUTTX_NET_IGMP_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <semaphore.h>
#include <netinet/in.h>
#include <nuttx/net/netconfig.h>
#include <nuttx/net/netdev.h>
#include <nuttx/net/ip.h>
#ifdef CONFIG_NET_IGMP
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifdef CONFIG_NET_IPv6
# error "IGMP for IPv6 not supported"
#endif
/* IGMP packet types */
#define IGMP_MEMBERSHIP_QUERY 0x11 /* Membership Query */
#define IGMPv1_MEMBERSHIP_REPORT 0x12 /* IGMP Ver. 1 Membership Report */
#define IGMPv2_MEMBERSHIP_REPORT 0x16 /* IGMP Ver. 2 Membership Report */
#define IGMPv3_MEMBERSHIP_REPORT 0x22 /* IGMP Ver. 3 Membership Report */
#define IGMP_LEAVE_GROUP 0x17 /* Leave Group */
/* Header sizes:
*
* IGMP_HDRLEN - Size of IGMP header in bytes
* IPIGMP_HDRLEN - Size of IP + Size of IGMP header + Size of router alert
*/
#define IGMP_HDRLEN 8
#define IPIGMP_HDRLEN (IGMP_HDRLEN + IPv4_HDRLEN + 4)
/* Group flags */
#define IGMP_PREALLOCATED (1 << 0)
#define IGMP_LASTREPORT (1 << 1)
#define IGMP_IDLEMEMBER (1 << 2)
#define IGMP_SCHEDMSG (1 << 3)
#define IGMP_WAITMSG (1 << 4)
#define SET_PREALLOCATED(f) do { (f) |= IGMP_PREALLOCATED; } while (0)
#define SET_LASTREPORT(f) do { (f) |= IGMP_LASTREPORT; } while (0)
#define SET_IDLEMEMBER(f) do { (f) |= IGMP_IDLEMEMBER; } while (0)
#define SET_SCHEDMSG(f) do { (f) |= IGMP_SCHEDMSG; } while (0)
#define SET_WAITMSG(f) do { (f) |= IGMP_WAITMSG; } while (0)
#define CLR_PREALLOCATED(f) do { (f) &= ~IGMP_PREALLOCATED; } while (0)
#define CLR_LASTREPORT(f) do { (f) &= ~IGMP_LASTREPORT; } while (0)
#define CLR_IDLEMEMBER(f) do { (f) &= ~IGMP_IDLEMEMBER; } while (0)
#define CLR_SCHEDMSG(f) do { (f) &= ~IGMP_SCHEDMSG; } while (0)
#define CLR_WAITMSG(f) do { (f) &= ~IGMP_WAITMSG; } while (0)
#define IS_PREALLOCATED(f) (((f) & IGMP_PREALLOCATED) != 0)
#define IS_LASTREPORT(f) (((f) & IGMP_LASTREPORT) != 0)
#define IS_IDLEMEMBER(f) (((f) & IGMP_IDLEMEMBER) != 0)
#define IS_SCHEDMSG(f) (((f) & IGMP_SCHEDMSG) != 0)
#define IS_WAITMSG(f) (((f) & IGMP_WAITMSG) != 0)
#define IGMP_TTL 1
/****************************************************************************
* Public Types
****************************************************************************/
/* IGMPv2 packet structure as defined by RFC 2236.
*
* The Max Response Time (maxresp) specifies the time limit for the
* corresponding report. The field has a resolution of 100 miliseconds, the
* value is taken directly. This field is meaningful only in Membership Query
* (0x11); in other messages it is set to 0 and ignored by the receiver.
*/
struct igmp_iphdr_s
{
#ifdef CONFIG_NET_IPv6
/* IPv6 Ip header */
uint8_t vtc; /* Bits 0-3: version, bits 4-7: traffic class (MS) */
uint8_t tcf; /* Bits 0-3: traffic class (LS), bits 4-7: flow label (MS) */
uint16_t flow; /* 16-bit flow label (LS) */
uint8_t len[2]; /* 16-bit Payload length */
uint8_t proto; /* 8-bit Next header (same as IPv4 protocol field) */
uint8_t ttl; /* 8-bit Hop limit (like IPv4 TTL field) */
net_ip6addr_t srcipaddr; /* 128-bit Source address */
net_ip6addr_t destipaddr; /* 128-bit Destination address */
#else /* CONFIG_NET_IPv6 */
/* IPv4 IP header */
uint8_t vhl; /* 8-bit Version (4) and header length (6 with Router Alert) */
uint8_t tos; /* 8-bit Type of service (e.g., 6=TCP) */
uint8_t len[2]; /* 16-bit Total length */
uint8_t ipid[2]; /* 16-bit Identification */
uint8_t ipoffset[2]; /* 16-bit IP flags + fragment offset */
uint8_t ttl; /* 8-bit Time to Live */
uint8_t proto; /* 8-bit Protocol */
uint16_t ipchksum; /* 16-bit Header checksum */
uint16_t srcipaddr[2]; /* 32-bit Source IP address */
uint16_t destipaddr[2]; /* 32-bit Destination IP address */
#endif /* CONFIG_NET_IPv6 */
/* Router Alert IP header option */
uint16_t ra[2];
/* IGMPv2 header:
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Type | Max Resp Time | Checksum |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Group Address |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
uint8_t type; /* 8-bit IGMP packet type */
uint8_t maxresp; /* 8-bit Max response time */
uint16_t chksum; /* 16-bit Checksum */
uint16_t grpaddr[2]; /* 32-bit Group address */
};
#ifdef CONFIG_NET_STATISTICS
struct igmp_stats_s
{
net_stats_t length_errors;
net_stats_t chksum_errors;
net_stats_t v1_received;
net_stats_t joins;
net_stats_t leaves;
net_stats_t leave_sched;
net_stats_t report_sched;
net_stats_t poll_send;
net_stats_t ucast_query;
net_stats_t query_received;
net_stats_t report_received;
};
# define IGMP_STATINCR(p) ((p)++)
#else
# define IGMP_STATINCR(p)
#endif
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* CONFIG_NET_IGMP */
#endif /* __INCLUDE_NUTTX_NET_IGMP_H */
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