Quelle mroute6.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI__LINUX_MROUTE6_H
#define _UAPI__LINUX_MROUTE6_H

#include <linux/const.h>
#include <linux/types.h>
#include <linux/sockios.h>
#include <linux/in6.h>  /* For struct sockaddr_in6. */

/*
* Based on the MROUTING 3.5 defines primarily to keep
* source compatibility with BSD.
*
* See the pim6sd code for the original history.
*
*      Protocol Independent Multicast (PIM) data structures included
*      Carlos Picoto (cap@di.fc.ul.pt)
*
*/

#define MRT6_BASE 200
#define MRT6_INIT (MRT6_BASE) /* Activate the kernel mroute code */
#define MRT6_DONE (MRT6_BASE+1) /* Shutdown the kernel mroute */
#define MRT6_ADD_MIF (MRT6_BASE+2) /* Add a virtual interface */
#define MRT6_DEL_MIF (MRT6_BASE+3) /* Delete a virtual interface */
#define MRT6_ADD_MFC (MRT6_BASE+4) /* Add a multicast forwarding entry */
#define MRT6_DEL_MFC (MRT6_BASE+5) /* Delete a multicast forwarding entry */
#define MRT6_VERSION (MRT6_BASE+6) /* Get the kernel multicast version */
#define MRT6_ASSERT (MRT6_BASE+7) /* Activate PIM assert mode */
#define MRT6_PIM (MRT6_BASE+8) /* enable PIM code */
#define MRT6_TABLE (MRT6_BASE+9) /* Specify mroute table ID */
#define MRT6_ADD_MFC_PROXY (MRT6_BASE+10) /* Add a (*,*|G) mfc entry */
#define MRT6_DEL_MFC_PROXY (MRT6_BASE+11) /* Del a (*,*|G) mfc entry */
#define MRT6_FLUSH (MRT6_BASE+12) /* Flush all mfc entries and/or vifs */
#define MRT6_MAX (MRT6_BASE+12)

#define SIOCGETMIFCNT_IN6 SIOCPROTOPRIVATE /* IP protocol privates */
#define SIOCGETSGCNT_IN6 (SIOCPROTOPRIVATE+1)
#define SIOCGETRPF (SIOCPROTOPRIVATE+2)

/* MRT6_FLUSH optional flags */
#define MRT6_FLUSH_MFC 1 /* Flush multicast entries */
#define MRT6_FLUSH_MFC_STATIC 2 /* Flush static multicast entries */
#define MRT6_FLUSH_MIFS 4 /* Flushing multicast vifs */
#define MRT6_FLUSH_MIFS_STATIC 8 /* Flush static multicast vifs */

#define MAXMIFS  32
typedef unsigned long mifbitmap_t; /* User mode code depends on this lot */
typedef unsigned short mifi_t;
#define ALL_MIFS ((mifi_t)(-1))

#ifndef IF_SETSIZE
#define IF_SETSIZE 256
#endif

typedef __u32  if_mask;
#define NIFBITS (sizeof(if_mask) * 8)        /* bits per mask */

typedef struct if_set {
if_mask ifs_bits[__KERNEL_DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
} if_set;

#define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
#define IF_CLR(n, p)    ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
#define IF_ISSET(n, p)  ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
#define IF_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
#define IF_ZERO(p)      bzero(p, sizeof(*(p)))

/*
* Passed by mrouted for an MRT_ADD_MIF - again we use the
* mrouted 3.6 structures for compatibility
*/

struct mif6ctl {
mifi_t mif6c_mifi;  /* Index of MIF */
unsigned char mif6c_flags; /* MIFF_ flags */
unsigned char vifc_threshold; /* ttl limit */
__u16  mif6c_pifi;  /* the index of the physical IF */
unsigned int vifc_rate_limit; /* Rate limiter values (NI) */
};

#define MIFF_REGISTER 0x1 /* register vif */

/*
* Cache manipulation structures for mrouted and PIMd
*/

struct mf6cctl {
struct sockaddr_in6 mf6cc_origin;  /* Origin of mcast */
struct sockaddr_in6 mf6cc_mcastgrp;  /* Group in question */
mifi_t mf6cc_parent;   /* Where it arrived */
struct if_set mf6cc_ifset;  /* Where it is going */
};

/*
* Group count retrieval for pim6sd
*/

struct sioc_sg_req6 {
struct sockaddr_in6 src;
struct sockaddr_in6 grp;
unsigned long pktcnt;
unsigned long bytecnt;
unsigned long wrong_if;
};

/*
* To get vif packet counts
*/

struct sioc_mif_req6 {
mifi_t mifi;  /* Which iface */
unsigned long icount; /* In packets */
unsigned long ocount; /* Out packets */
unsigned long ibytes; /* In bytes */
unsigned long obytes; /* Out bytes */
};

/*
* That's all usermode folks
*/

/*
* Structure used to communicate from kernel to multicast router.
* We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
* used for IPv4 implementation). This is because this structure will be passed via an
* IPv6 raw socket, on which an application will only receiver the payload i.e the data after
* the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
*/

struct mrt6msg {
#define MRT6MSG_NOCACHE  1
#define MRT6MSG_WRONGMIF 2
#define MRT6MSG_WHOLEPKT 3  /* used for use level encap */
#define MRT6MSG_WRMIFWHOLE 4  /* For PIM Register and assert processing */
__u8  im6_mbz;  /* must be zero    */
__u8  im6_msgtype;  /* what type of message    */
__u16  im6_mif;  /* mif rec'd on    */
__u32  im6_pad;  /* padding for 64 bit arch */
struct in6_addr im6_src, im6_dst;
};

/* ip6mr netlink cache report attributes */
enum {
IP6MRA_CREPORT_UNSPEC,
IP6MRA_CREPORT_MSGTYPE,
IP6MRA_CREPORT_MIF_ID,
IP6MRA_CREPORT_SRC_ADDR,
IP6MRA_CREPORT_DST_ADDR,
IP6MRA_CREPORT_PKT,
__IP6MRA_CREPORT_MAX
};
#define IP6MRA_CREPORT_MAX (__IP6MRA_CREPORT_MAX - 1)

#endif /* _UAPI__LINUX_MROUTE6_H */

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