cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/linux/mroute.h

#ifndef _UAPI__LINUX_MROUTE_H

#define _UAPI__LINUX_MROUTE_H

#include <linux/sockios.h>
#include <linux/types.h>
#include <linux/in.h>		/* For struct in_addr. */

/* 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 MRT_TABLE	(MRT_BASE+9)	
/* Specify mroute table ID              */

#define MRT_ADD_MFC_PROXY	(MRT_BASE+10)	
/* Add a (*,*|G) mfc entry      */

#define MRT_DEL_MFC_PROXY	(MRT_BASE+11)	
/* Del a (*,*|G) mfc entry      */

#define MRT_MAX		(MRT_BASE+11)


#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) */
	union {
		
struct in_addr vifc_lcl_addr;     /* Local interface address */
		
int            vifc_lcl_ifindex;  /* Local interface index   */
	};
	
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 */

#define VIFF_USE_IFINDEX	0x8	
/* use vifc_lcl_ifindex instead of
                                           vifc_lcl_addr to find an interface */

/* 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 */


#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 */

#endif /* _UAPI__LINUX_MROUTE_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
David Howells36793.15%120.00%
Nicolas Dichtel143.55%240.00%
Nikolay Aleksandrov92.28%120.00%
Dmitry V. Levin41.02%120.00%
Total394100.00%5100.00%
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