include/linux/igmp.h

/* */
   1 /*
   2  *      Linux NET3:     Internet Gateway Management Protocol  [IGMP]
   3  *
   4  *      Authors:
   5  *              Alan Cox <Alan.Cox@linux.org>
   6  *
   7  *      Extended to talk the BSD extended IGMP protocol of mrouted 3.6
   8  *
   9  *
  10  *      This program is free software; you can redistribute it and/or
  11  *      modify it under the terms of the GNU General Public License
  12  *      as published by the Free Software Foundation; either version
  13  *      2 of the License, or (at your option) any later version.
  14  */
  15 
  16 #ifndef _LINUX_IGMP_H
  17 #define _LINUX_IGMP_H
  18 
  19 /*
  20  *      IGMP protocol structures
  21  */
  22 
  23 /*
  24  *      Header in on cable format
  25  */
  26 
  27 struct igmphdr
  28 {
  29         __u8 type;
  30         __u8 code;              /* For newer IGMP */
  31         __u16 csum;
  32         __u32 group;
  33 };
  34 
  35 #define IGMP_HOST_MEMBERSHIP_QUERY      0x11    /* From RFC1112 */
  36 #define IGMP_HOST_MEMBERSHIP_REPORT     0x12    /* Ditto */
  37 #define IGMP_DVMRP                      0x13    /* DVMRP routing */
  38 #define IGMP_PIM                        0x14    /* PIM routing */
  39 #define IGMP_HOST_NEW_MEMBERSHIP_REPORT 0x16    /* New version of 0x11 */
  40 #define IGMP_HOST_LEAVE_MESSAGE         0x17    /* An extra BSD seems to send */
  41 
  42 #define IGMP_MTRACE_RESP                0x1e
  43 #define IGMP_MTRACE                     0x1f
  44 
  45 
  46 /*
  47  *      Use the BSD names for these for compatibility
  48  */
  49 
  50 #define IGMP_DELAYING_MEMBER            0x01
  51 #define IGMP_IDLE_MEMBER                0x02
  52 #define IGMP_LAZY_MEMBER                0x03
  53 #define IGMP_SLEEPING_MEMBER            0x04
  54 #define IGMP_AWAKENING_MEMBER           0x05
  55 
  56 #define IGMP_OLD_ROUTER                 0x00
  57 #define IGMP_NEW_ROUTER                 0x01
  58 
  59 #define IGMP_MINLEN                     8
  60 
  61 #define IGMP_MAX_HOST_REPORT_DELAY      10      /* max delay for response to */
  62                                                 /* query (in seconds)   */
  63 
  64 #define IGMP_TIMER_SCALE                10      /* denotes that the igmphdr->timer field */
  65                                                 /* specifies time in 10th of seconds     */
  66 
  67 #define IGMP_AGE_THRESHOLD              540     /* If this host don't hear any IGMP V1  */
  68                                                 /* message in this period of time,      */
  69                                                 /* revert to IGMP v2 router.            */
  70 
  71 #define IGMP_ALL_HOSTS          htonl(0xE0000001L)
  72 #define IGMP_ALL_ROUTER         htonl(0xE0000002L)
  73 #define IGMP_LOCAL_GROUP        htonl(0xE0000000L)
  74 #define IGMP_LOCAL_GROUP_MASK   htonl(0xFFFFFF00L)
  75 
  76 /*
  77  * struct for keeping the multicast list in
  78  */
  79 
  80 #ifdef __KERNEL__
  81 struct ip_mc_socklist
  82 {
  83         unsigned long multiaddr[IP_MAX_MEMBERSHIPS];    /* This is a speed trade off */
  84         struct device *multidev[IP_MAX_MEMBERSHIPS];
  85 };
  86 
  87 struct ip_mc_list
  88 {
  89         struct device *interface;
  90         unsigned long multiaddr;
  91         struct ip_mc_list *next;
  92         struct timer_list timer;
  93         int tm_running;
  94         int users;
  95 };
  96 
  97 struct ip_router_info
  98 {
  99         struct device *dev;
 100         int    type;    /* type of router which is querier on this interface */
 101         int    time;    /* # of slow timeouts since last old query */
 102         struct timer_list timer;
 103         struct ip_router_info *next;
 104 };
 105 
 106 extern struct ip_mc_list *ip_mc_head;
 107 
 108 
 109 extern int igmp_rcv(struct sk_buff *, struct device *, struct options *, __u32, unsigned short,
 110         __u32, int , struct inet_protocol *);
 111 extern void ip_mc_drop_device(struct device *dev);
 112 extern int ip_mc_join_group(struct sock *sk, struct device *dev, unsigned long addr);
 113 extern int ip_mc_leave_group(struct sock *sk, struct device *dev,unsigned long addr);
 114 extern void ip_mc_drop_socket(struct sock *sk);
 115 extern void ip_mr_init(void);
 116 #endif
 117 #endif
/* */
root/include/linux/igmp.h

INCLUDED FROM
