include/uapi/linux/rtnetlink.h

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

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/rtnetlink.h
Extension
.h
Size
21925 bytes
Lines
850
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 rtattr {
	unsigned short	rta_len;
	unsigned short	rta_type;
};

/* Macros to handle rtattributes */

#define RTA_ALIGNTO	4U
#define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
#define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
			 (rta)->rta_len >= sizeof(struct rtattr) && \
			 (rta)->rta_len <= (len))
#define RTA_NEXT(rta,attrlen)	((attrlen) -= RTA_ALIGN((rta)->rta_len), \
				 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
#define RTA_LENGTH(len)	(RTA_ALIGN(sizeof(struct rtattr)) + (len))
#define RTA_SPACE(len)	RTA_ALIGN(RTA_LENGTH(len))
#define RTA_DATA(rta)   ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
#define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))




/******************************************************************************
 *		Definitions used in routing table administration.
 ****/

struct rtmsg {
	unsigned char		rtm_family;
	unsigned char		rtm_dst_len;
	unsigned char		rtm_src_len;
	unsigned char		rtm_tos;

	unsigned char		rtm_table;	/* Routing table id */
	unsigned char		rtm_protocol;	/* Routing protocol; see below	*/
	unsigned char		rtm_scope;	/* See below */	
	unsigned char		rtm_type;	/* See below	*/

	unsigned		rtm_flags;
};

/* rtm_type */

enum {
	RTN_UNSPEC,
	RTN_UNICAST,		/* Gateway or direct route	*/
	RTN_LOCAL,		/* Accept locally		*/
	RTN_BROADCAST,		/* Accept locally as broadcast,
				   send as broadcast */
	RTN_ANYCAST,		/* Accept locally as broadcast,
				   but send as unicast */
	RTN_MULTICAST,		/* Multicast route		*/
	RTN_BLACKHOLE,		/* Drop				*/
	RTN_UNREACHABLE,	/* Destination is unreachable   */
	RTN_PROHIBIT,		/* Administratively prohibited	*/
	RTN_THROW,		/* Not in this table		*/
	RTN_NAT,		/* Translate this address	*/
	RTN_XRESOLVE,		/* Use external resolver	*/
	__RTN_MAX
};

#define RTN_MAX (__RTN_MAX - 1)


/* rtm_protocol */

#define RTPROT_UNSPEC		0
#define RTPROT_REDIRECT		1	/* Route installed by ICMP redirects;
					   not used by current IPv4 */
#define RTPROT_KERNEL		2	/* Route installed by kernel		*/
#define RTPROT_BOOT		3	/* Route installed during boot		*/
#define RTPROT_STATIC		4	/* Route installed by administrator	*/

/* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
   they are just passed from user and back as is.
   It will be used by hypothetical multiple routing daemons.
   Note that protocol values should be standardized in order to
   avoid conflicts.
 */

#define RTPROT_GATED		8	/* Apparently, GateD */
#define RTPROT_RA		9	/* RDISC/ND router advertisements */
#define RTPROT_MRT		10	/* Merit MRT */
#define RTPROT_ZEBRA		11	/* Zebra */
#define RTPROT_BIRD		12	/* BIRD */
#define RTPROT_DNROUTED		13	/* DECnet routing daemon */
#define RTPROT_XORP		14	/* XORP */
#define RTPROT_NTK		15	/* Netsukuku */
#define RTPROT_DHCP		16	/* DHCP client */
#define RTPROT_MROUTED		17	/* Multicast daemon */
#define RTPROT_KEEPALIVED	18	/* Keepalived daemon */

Annotation

Implementation Notes