include/uapi/linux/mroute.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/mroute.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/mroute.h
Extension
.h
Size
5937 bytes
Lines
188
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

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;			/* Low 8 bits of Interface */
	unsigned char im_vif_hi;		/* High 8 bits of Interface */
	struct in_addr im_src,im_dst;
};

/* ipmr netlink table attributes */
enum {
	IPMRA_TABLE_UNSPEC,
	IPMRA_TABLE_ID,
	IPMRA_TABLE_CACHE_RES_QUEUE_LEN,
	IPMRA_TABLE_MROUTE_REG_VIF_NUM,
	IPMRA_TABLE_MROUTE_DO_ASSERT,
	IPMRA_TABLE_MROUTE_DO_PIM,
	IPMRA_TABLE_VIFS,
	IPMRA_TABLE_MROUTE_DO_WRVIFWHOLE,
	__IPMRA_TABLE_MAX
};
#define IPMRA_TABLE_MAX (__IPMRA_TABLE_MAX - 1)

/* ipmr netlink vif attribute format
 * [ IPMRA_TABLE_VIFS ] - nested attribute
 *   [ IPMRA_VIF ] - nested attribute
 *     [ IPMRA_VIFA_xxx ]
 */
enum {
	IPMRA_VIF_UNSPEC,
	IPMRA_VIF,
	__IPMRA_VIF_MAX
};
#define IPMRA_VIF_MAX (__IPMRA_VIF_MAX - 1)

/* vif-specific attributes */
enum {
	IPMRA_VIFA_UNSPEC,
	IPMRA_VIFA_IFINDEX,

Annotation

Implementation Notes