LXR linux/include/linux/mroute.h

   1#ifndef __LINUX_MROUTE_H
   2#define __LINUX_MROUTE_H
   3
   4#include <linux/in.h>
   5#include <linux/pim.h>
   6#include <net/sock.h>
   7#include <uapi/linux/mroute.h>
   8
   9#ifdef CONFIG_IP_MROUTE
  10static inline int ip_mroute_opt(int opt)
  11{
  12        return opt >= MRT_BASE && opt <= MRT_MAX;
  13}
  14
  15int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
  16int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
  17int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
  18int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
  19int ip_mr_init(void);
  20#else
  21static inline int ip_mroute_setsockopt(struct sock *sock, int optname,
  22                                       char __user *optval, unsigned int optlen)
  23{
  24        return -ENOPROTOOPT;
  25}
  26
  27static inline int ip_mroute_getsockopt(struct sock *sock, int optname,
  28                                       char __user *optval, int __user *optlen)
  29{
  30        return -ENOPROTOOPT;
  31}
  32
  33static inline int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
  34{
  35        return -ENOIOCTLCMD;
  36}
  37
  38static inline int ip_mr_init(void)
  39{
  40        return 0;
  41}
  42
  43static inline int ip_mroute_opt(int opt)
  44{
  45        return 0;
  46}
  47#endif
  48
  49struct vif_device {
  50        struct net_device       *dev;                   /* Device we are using */
  51        unsigned long   bytes_in,bytes_out;
  52        unsigned long   pkt_in,pkt_out;         /* Statistics                   */
  53        unsigned long   rate_limit;             /* Traffic shaping (NI)         */
  54        unsigned char   threshold;              /* TTL threshold                */
  55        unsigned short  flags;                  /* Control flags                */
  56        __be32          local,remote;           /* Addresses(remote for tunnels)*/
  57        int             link;                   /* Physical interface index     */
  58};
  59
  60#define VIFF_STATIC 0x8000
  61
  62#define VIF_EXISTS(_mrt, _idx) ((_mrt)->vif_table[_idx].dev != NULL)
  63#define MFC_LINES 64
  64
  65struct mr_table {
  66        struct list_head        list;
  67        possible_net_t          net;
  68        u32                     id;
  69        struct sock __rcu       *mroute_sk;
  70        struct timer_list       ipmr_expire_timer;
  71        struct list_head        mfc_unres_queue;
  72        struct list_head        mfc_cache_array[MFC_LINES];
  73        struct vif_device       vif_table[MAXVIFS];
  74        int                     maxvif;
  75        atomic_t                cache_resolve_queue_len;
  76        bool                    mroute_do_assert;
  77        bool                    mroute_do_pim;
  78        int                     mroute_reg_vif_num;
  79};
  80
  81/* mfc_flags:
  82 * MFC_STATIC - the entry was added statically (not by a routing daemon)
  83 */
  84enum {
  85        MFC_STATIC = BIT(0),
  86};
  87
  88struct mfc_cache {
  89        struct list_head list;
  90        __be32 mfc_mcastgrp;                    /* Group the entry belongs to   */
  91        __be32 mfc_origin;                      /* Source of packet             */
  92        vifi_t mfc_parent;                      /* Source interface             */
  93        int mfc_flags;                          /* Flags on line                */
  94
  95        union {
  96                struct {
  97                        unsigned long expires;
  98                        struct sk_buff_head unresolved; /* Unresolved buffers           */
  99                } unres;
 100                struct {
 101                        unsigned long last_assert;
 102                        int minvif;
 103                        int maxvif;
 104                        unsigned long bytes;
 105                        unsigned long pkt;
 106                        unsigned long wrong_if;
 107                        unsigned char ttls[MAXVIFS];    /* TTL thresholds               */
 108                } res;
 109        } mfc_un;
 110        struct rcu_head rcu;
 111};
 112
 113#ifdef __BIG_ENDIAN
 114#define MFC_HASH(a,b)   (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))
 115#else
 116#define MFC_HASH(a,b)   ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))
 117#endif
 118
 119struct rtmsg;
 120int ipmr_get_route(struct net *net, struct sk_buff *skb,
 121                   __be32 saddr, __be32 daddr,
 122                   struct rtmsg *rtm, int nowait);
 123#endif
 124