mroute.h
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上传日期:2013-02-24
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- #ifndef __LINUX_MROUTE_H
- #define __LINUX_MROUTE_H
- #include <linux/sockios.h>
- #include <linux/in.h>
- /*
- * Based on the MROUTING 3.5 defines primarily to keep
- * source compatibility with BSD.
- *
- * See the mrouted code for the original history.
- *
- * Protocol Independent Multicast (PIM) data structures included
- * Carlos Picoto (cap@di.fc.ul.pt)
- *
- */
- #define MRT_BASE 200
- #define MRT_INIT (MRT_BASE) /* Activate the kernel mroute code */
- #define MRT_DONE (MRT_BASE+1) /* Shutdown the kernel mroute */
- #define MRT_ADD_VIF (MRT_BASE+2) /* Add a virtual interface */
- #define MRT_DEL_VIF (MRT_BASE+3) /* Delete a virtual interface */
- #define MRT_ADD_MFC (MRT_BASE+4) /* Add a multicast forwarding entry */
- #define MRT_DEL_MFC (MRT_BASE+5) /* Delete a multicast forwarding entry */
- #define MRT_VERSION (MRT_BASE+6) /* Get the kernel multicast version */
- #define MRT_ASSERT (MRT_BASE+7) /* Activate PIM assert mode */
- #define MRT_PIM (MRT_BASE+8) /* enable PIM code */
- #define SIOCGETVIFCNT SIOCPROTOPRIVATE /* IP protocol privates */
- #define SIOCGETSGCNT (SIOCPROTOPRIVATE+1)
- #define SIOCGETRPF (SIOCPROTOPRIVATE+2)
- #define MAXVIFS 32
- typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */
- typedef unsigned short vifi_t;
- #define ALL_VIFS ((vifi_t)(-1))
- /*
- * Same idea as select
- */
-
- #define VIFM_SET(n,m) ((m)|=(1<<(n)))
- #define VIFM_CLR(n,m) ((m)&=~(1<<(n)))
- #define VIFM_ISSET(n,m) ((m)&(1<<(n)))
- #define VIFM_CLRALL(m) ((m)=0)
- #define VIFM_COPY(mfrom,mto) ((mto)=(mfrom))
- #define VIFM_SAME(m1,m2) ((m1)==(m2))
- /*
- * Passed by mrouted for an MRT_ADD_VIF - again we use the
- * mrouted 3.6 structures for compatibility
- */
-
- struct vifctl {
- vifi_t vifc_vifi; /* Index of VIF */
- unsigned char vifc_flags; /* VIFF_ flags */
- unsigned char vifc_threshold; /* ttl limit */
- unsigned int vifc_rate_limit; /* Rate limiter values (NI) */
- struct in_addr vifc_lcl_addr; /* Our address */
- struct in_addr vifc_rmt_addr; /* IPIP tunnel addr */
- };
- #define VIFF_TUNNEL 0x1 /* IPIP tunnel */
- #define VIFF_SRCRT 0x2 /* NI */
- #define VIFF_REGISTER 0x4 /* register vif */
- /*
- * Cache manipulation structures for mrouted and PIMd
- */
-
- struct mfcctl
- {
- struct in_addr mfcc_origin; /* Origin of mcast */
- struct in_addr mfcc_mcastgrp; /* Group in question */
- vifi_t mfcc_parent; /* Where it arrived */
- unsigned char mfcc_ttls[MAXVIFS]; /* Where it is going */
- unsigned int mfcc_pkt_cnt; /* pkt count for src-grp */
- unsigned int mfcc_byte_cnt;
- unsigned int mfcc_wrong_if;
- int mfcc_expire;
- };
- /*
- * Group count retrieval for mrouted
- */
-
- struct sioc_sg_req
- {
- struct in_addr src;
- struct in_addr grp;
- unsigned long pktcnt;
- unsigned long bytecnt;
- unsigned long wrong_if;
- };
- /*
- * To get vif packet counts
- */
- struct sioc_vif_req
- {
- vifi_t vifi; /* Which iface */
- unsigned long icount; /* In packets */
- unsigned long ocount; /* Out packets */
- unsigned long ibytes; /* In bytes */
- unsigned long obytes; /* Out bytes */
- };
- /*
- * This is the format the mroute daemon expects to see IGMP control
- * data. Magically happens to be like an IP packet as per the original
- */
-
- struct igmpmsg
- {
- __u32 unused1,unused2;
- unsigned char im_msgtype; /* What is this */
- unsigned char im_mbz; /* Must be zero */
- unsigned char im_vif; /* Interface (this ought to be a vifi_t!) */
- unsigned char unused3;
- struct in_addr im_src,im_dst;
- };
- /*
- * That's all usermode folks
- */
- #ifdef __KERNEL__
- extern int ip_mroute_setsockopt(struct sock *, int, char *, int);
- extern int ip_mroute_getsockopt(struct sock *, int, char *, int *);
- extern int ipmr_ioctl(struct sock *sk, int cmd, unsigned long arg);
- extern void ip_mr_init(void);
- struct vif_device
- {
- struct net_device *dev; /* Device we are using */
- unsigned long bytes_in,bytes_out;
- unsigned long pkt_in,pkt_out; /* Statistics */
- unsigned long rate_limit; /* Traffic shaping (NI) */
- unsigned char threshold; /* TTL threshold */
- unsigned short flags; /* Control flags */
- __u32 local,remote; /* Addresses(remote for tunnels)*/
- int link; /* Physical interface index */
- };
- #define VIFF_STATIC 0x8000
- struct mfc_cache
- {
- struct mfc_cache *next; /* Next entry on cache line */
- __u32 mfc_mcastgrp; /* Group the entry belongs to */
- __u32 mfc_origin; /* Source of packet */
- vifi_t mfc_parent; /* Source interface */
- int mfc_flags; /* Flags on line */
- union {
- struct {
- unsigned long expires;
- struct sk_buff_head unresolved; /* Unresolved buffers */
- } unres;
- struct {
- unsigned long last_assert;
- int minvif;
- int maxvif;
- unsigned long bytes;
- unsigned long pkt;
- unsigned long wrong_if;
- unsigned char ttls[MAXVIFS]; /* TTL thresholds */
- } res;
- } mfc_un;
- };
- #define MFC_STATIC 1
- #define MFC_NOTIFY 2
- #define MFC_LINES 64
- #ifdef __BIG_ENDIAN
- #define MFC_HASH(a,b) ((((a)>>24)^((b)>>26))&(MFC_LINES-1))
- #else
- #define MFC_HASH(a,b) (((a)^((b)>>2))&(MFC_LINES-1))
- #endif
- #endif
- #define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
- /*
- * Pseudo messages used by mrouted
- */
- #define IGMPMSG_NOCACHE 1 /* Kern cache fill request to mrouted */
- #define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */
- #define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */
- #ifdef __KERNEL__
- #define PIM_V1_VERSION __constant_htonl(0x10000000)
- #define PIM_V1_REGISTER 1
- #define PIM_VERSION 2
- #define PIM_REGISTER 1
- #define PIM_NULL_REGISTER __constant_htonl(0x40000000)
- /* PIMv2 register message header layout (ietf-draft-idmr-pimvsm-v2-00.ps */
- struct pimreghdr
- {
- __u8 type;
- __u8 reserved;
- __u16 csum;
- __u32 flags;
- };
- extern int pim_rcv(struct sk_buff *);
- extern int pim_rcv_v1(struct sk_buff *);
- struct rtmsg;
- extern int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait);
- #endif
- #endif