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#ifndef __LINUX_RTNETLINK_H
#define __LINUX_RTNETLINK_H
#include <linux/netlink.h>
/****
* Routing/neighbour discovery messages.
****/
/* Types of messages */
#define RTM_BASE 0x10
#define RTM_NEWLINK (RTM_BASE+0)
#define RTM_DELLINK (RTM_BASE+1)
#define RTM_GETLINK (RTM_BASE+2)
#define RTM_SETLINK (RTM_BASE+3)
#define RTM_NEWADDR (RTM_BASE+4)
#define RTM_DELADDR (RTM_BASE+5)
#define RTM_GETADDR (RTM_BASE+6)
#define RTM_NEWROUTE (RTM_BASE+8)
#define RTM_DELROUTE (RTM_BASE+9)
#define RTM_GETROUTE (RTM_BASE+10)
#define RTM_NEWNEIGH (RTM_BASE+12)
#define RTM_DELNEIGH (RTM_BASE+13)
#define RTM_GETNEIGH (RTM_BASE+14)
#define RTM_NEWRULE (RTM_BASE+16)
#define RTM_DELRULE (RTM_BASE+17)
#define RTM_GETRULE (RTM_BASE+18)
#define RTM_NEWQDISC (RTM_BASE+20)
#define RTM_DELQDISC (RTM_BASE+21)
#define RTM_GETQDISC (RTM_BASE+22)
#define RTM_NEWTCLASS (RTM_BASE+24)
#define RTM_DELTCLASS (RTM_BASE+25)
#define RTM_GETTCLASS (RTM_BASE+26)
#define RTM_NEWTFILTER (RTM_BASE+28)
#define RTM_DELTFILTER (RTM_BASE+29)
#define RTM_GETTFILTER (RTM_BASE+30)
#define RTM_MAX (RTM_BASE+31)
/*
Generic structure for encapsulation of optional route information.
It is reminiscent of sockaddr, but with sa_family replaced
with attribute type.
*/
struct rtattr
{
unsigned short rta_len;
unsigned short rta_type;
};
/* Macros to handle rtattributes */
#define RTA_ALIGNTO 4
#define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
#define RTA_OK(rta,len) ((len) > 0 && (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 */
};
#define RTN_MAX RTN_XRESOLVE
/* 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 */
/* rtm_scope
Really it is not scope, but sort of distance to the destination.
NOWHERE are reserved for not existing destinations, HOST is our
local addresses, LINK are destinations, located on directly attached
link and UNIVERSE is everywhere in the Universe.
Intermediate values are also possible f.e. interior routes
could be assigned a value between UNIVERSE and LINK.
*/
enum rt_scope_t
{
RT_SCOPE_UNIVERSE=0,
/* User defined values */
RT_SCOPE_SITE=200,
RT_SCOPE_LINK=253,
RT_SCOPE_HOST=254,
RT_SCOPE_NOWHERE=255
};
/* rtm_flags */
#define RTM_F_NOTIFY 0x100 /* Notify user of route change */
#define RTM_F_CLONED 0x200 /* This route is cloned */
#define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */
#define RTM_F_PREFIX 0x800 /* Prefix addresses */
/* Reserved table identifiers */
enum rt_class_t
{
RT_TABLE_UNSPEC=0,
/* User defined values */
RT_TABLE_DEFAULT=253,
RT_TABLE_MAIN=254,
RT_TABLE_LOCAL=255
};
#define RT_TABLE_MAX RT_TABLE_LOCAL
/* Routing message attributes */
enum rtattr_type_t
{
RTA_UNSPEC,
RTA_DST,
RTA_SRC,
RTA_IIF,
RTA_OIF,
RTA_GATEWAY,
RTA_PRIORITY,
RTA_PREFSRC,
RTA_METRICS,
RTA_MULTIPATH,
RTA_PROTOINFO,
RTA_FLOW,
RTA_CACHEINFO,
RTA_SESSION,
};
#define RTA_MAX RTA_SESSION
#define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
#define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
/* RTM_MULTIPATH --- array of struct rtnexthop.
*
* "struct rtnexthop" describes all necessary nexthop information,
* i.e. parameters of path to a destination via this nexthop.
*
* At the moment it is impossible to set different prefsrc, mtu, window
* and rtt for different paths from multipath.
*/
struct rtnexthop
{
unsigned short rtnh_len;
unsigned char rtnh_flags;
unsigned char rtnh_hops;
int rtnh_ifindex;
};
/* rtnh_flags */
#define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */
#define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */
#define RTNH_F_ONLINK 4 /* Gateway is forced on link */
/* Macros to handle hexthops */
#define RTNH_ALIGNTO 4
#define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
#define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
((int)(rtnh)->rtnh_len) <= (len))
#define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
#define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
#define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
#define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
/* RTM_CACHEINFO */
struct rta_cacheinfo
{
__u32 rta_clntref;
__u32 rta_lastuse;
__s32 rta_expires;
__u32 rta_error;
__u32 rta_used;
#define RTNETLINK_HAVE_PEERINFO 1
__u32 rta_id;
__u32 rta_ts;
__u32 rta_tsage;
};
/* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
enum
{
RTAX_UNSPEC,
#define RTAX_UNSPEC RTAX_UNSPEC
RTAX_LOCK,
#define RTAX_LOCK RTAX_LOCK
RTAX_MTU,
#define RTAX_MTU RTAX_MTU
RTAX_WINDOW,
#define RTAX_WINDOW RTAX_WINDOW
RTAX_RTT,
#define RTAX_RTT RTAX_RTT
RTAX_RTTVAR,
#define RTAX_RTTVAR RTAX_RTTVAR
RTAX_SSTHRESH,
#define RTAX_SSTHRESH RTAX_SSTHRESH
RTAX_CWND,
#define RTAX_CWND RTAX_CWND
RTAX_ADVMSS,
#define RTAX_ADVMSS RTAX_ADVMSS
RTAX_REORDERING,
#define RTAX_REORDERING RTAX_REORDERING
RTAX_HOPLIMIT,
#define RTAX_HOPLIMIT RTAX_HOPLIMIT
RTAX_INITCWND,
#define RTAX_INITCWND RTAX_INITCWND
RTAX_FEATURES,
#define RTAX_FEATURES RTAX_FEATURES
};
#define RTAX_MAX RTAX_FEATURES
#define RTAX_FEATURE_ECN 0x00000001
#define RTAX_FEATURE_SACK 0x00000002
#define RTAX_FEATURE_TIMESTAMP 0x00000004
struct rta_session
{
__u8 proto;
union {
struct {
__u16 sport;
__u16 dport;
} ports;
struct {
__u8 type;
__u8 code;
__u16 ident;
} icmpt;
__u32 spi;
} u;
};
/*********************************************************
* Interface address.
****/
struct ifaddrmsg
{
unsigned char ifa_family;
unsigned char ifa_prefixlen; /* The prefix length */
unsigned char ifa_flags; /* Flags */
unsigned char ifa_scope; /* See above */
int ifa_index; /* Link index */
};
enum
{
IFA_UNSPEC,
IFA_ADDRESS,
IFA_LOCAL,
IFA_LABEL,
IFA_BROADCAST,
IFA_ANYCAST,
IFA_CACHEINFO
};
#define IFA_MAX IFA_CACHEINFO
/* ifa_flags */
#define IFA_F_SECONDARY 0x01
#define IFA_F_TEMPORARY IFA_F_SECONDARY
#define IFA_F_DEPRECATED 0x20
#define IFA_F_TENTATIVE 0x40
#define IFA_F_PERMANENT 0x80
struct ifa_cacheinfo
{
__u32 ifa_prefered;
__u32 ifa_valid;
__u32 cstamp; /* created timestamp, hundredths of seconds */
__u32 tstamp; /* updated timestamp, hundredths of seconds */
};
#define IFA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
/*
Important comment:
IFA_ADDRESS is prefix address, rather than local interface address.
It makes no difference for normally configured broadcast interfaces,
but for point-to-point IFA_ADDRESS is DESTINATION address,
local address is supplied in IFA_LOCAL attribute.
*/
/**************************************************************
* Neighbour discovery.
****/
struct ndmsg
{
unsigned char ndm_family;
unsigned char ndm_pad1;
unsigned short ndm_pad2;
int ndm_ifindex; /* Link index */
__u16 ndm_state;
__u8 ndm_flags;
__u8 ndm_type;
};
enum
{
NDA_UNSPEC,
NDA_DST,
NDA_LLADDR,
NDA_CACHEINFO
};
#define NDA_MAX NDA_CACHEINFO
#define NDA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
#define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
/*
* Neighbor Cache Entry Flags
*/
#define NTF_PROXY 0x08 /* == ATF_PUBL */
#define NTF_ROUTER 0x80
/*
* Neighbor Cache Entry States.
*/
#define NUD_INCOMPLETE 0x01
#define NUD_REACHABLE 0x02
#define NUD_STALE 0x04
#define NUD_DELAY 0x08
#define NUD_PROBE 0x10
#define NUD_FAILED 0x20
/* Dummy states */
#define NUD_NOARP 0x40
#define NUD_PERMANENT 0x80
#define NUD_NONE 0x00
struct nda_cacheinfo
{
__u32 ndm_confirmed;
__u32 ndm_used;
__u32 ndm_updated;
__u32 ndm_refcnt;
};
/****
* General form of address family dependent message.
****/
struct rtgenmsg
{
unsigned char rtgen_family;
};
/*****************************************************************
* Link layer specific messages.
****/
/* struct ifinfomsg
* passes link level specific information, not dependent
* on network protocol.
*/
struct ifinfomsg
{
unsigned char ifi_family;
unsigned char __ifi_pad;
unsigned short ifi_type; /* ARPHRD_* */
int ifi_index; /* Link index */
unsigned ifi_flags; /* IFF_* flags */
unsigned ifi_change; /* IFF_* change mask */
};
/* The struct should be in sync with struct net_device_stats */
struct rtnl_link_stats
{
__u32 rx_packets; /* total packets received */
__u32 tx_packets; /* total packets transmitted */
__u32 rx_bytes; /* total bytes received */
__u32 tx_bytes; /* total bytes transmitted */
__u32 rx_errors; /* bad packets received */
__u32 tx_errors; /* packet transmit problems */
__u32 rx_dropped; /* no space in linux buffers */
__u32 tx_dropped; /* no space available in linux */
__u32 multicast; /* multicast packets received */
__u32 collisions;
/* detailed rx_errors: */
__u32 rx_length_errors;
__u32 rx_over_errors; /* receiver ring buff overflow */
__u32 rx_crc_errors; /* recved pkt with crc error */
__u32 rx_frame_errors; /* recv'd frame alignment error */
__u32 rx_fifo_errors; /* recv'r fifo overrun */
__u32 rx_missed_errors; /* receiver missed packet */
/* detailed tx_errors */
__u32 tx_aborted_errors;
__u32 tx_carrier_errors;
__u32 tx_fifo_errors;
__u32 tx_heartbeat_errors;
__u32 tx_window_errors;
/* for cslip etc */
__u32 rx_compressed;
__u32 tx_compressed;
};
enum
{
IFLA_UNSPEC,
IFLA_ADDRESS,
IFLA_BROADCAST,
IFLA_IFNAME,
IFLA_MTU,
IFLA_LINK,
IFLA_QDISC,
IFLA_STATS,
IFLA_COST,
#define IFLA_COST IFLA_COST
IFLA_PRIORITY,
#define IFLA_PRIORITY IFLA_PRIORITY
IFLA_MASTER,
#define IFLA_MASTER IFLA_MASTER
IFLA_WIRELESS, /* Wireless Extension event - see wireless.h */
#define IFLA_WIRELESS IFLA_WIRELESS
IFLA_PROTINFO, /* Protocol specific information for a link */
#define IFLA_PROTINFO IFLA_PROTINFO
};
#define IFLA_MAX IFLA_PROTINFO
#define IFLA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
/* ifi_flags.
IFF_* flags.
The only change is:
IFF_LOOPBACK, IFF_BROADCAST and IFF_POINTOPOINT are
more not changeable by user. They describe link media
characteristics and set by device driver.
Comments:
- Combination IFF_BROADCAST|IFF_POINTOPOINT is invalid
- If neither of these three flags are set;
the interface is NBMA.
- IFF_MULTICAST does not mean anything special:
multicasts can be used on all not-NBMA links.
IFF_MULTICAST means that this media uses special encapsulation
for multicast frames. Apparently, all IFF_POINTOPOINT and
IFF_BROADCAST devices are able to use multicasts too.
*/
/* IFLA_LINK.
For usual devices it is equal ifi_index.
If it is a "virtual interface" (f.e. tunnel), ifi_link
can point to real physical interface (f.e. for bandwidth calculations),
or maybe 0, what means, that real media is unknown (usual
for IPIP tunnels, when route to endpoint is allowed to change)
*/
/* Subtype attributes for IFLA_PROTINFO */
enum
{
IFLA_INET6_UNSPEC,
IFLA_INET6_FLAGS, /* link flags */
IFLA_INET6_CONF, /* sysctl parameters */
IFLA_INET6_STATS, /* statistics */
IFLA_INET6_MCAST, /* MC things. What of them? */
};
#define IFLA_INET6_MAX IFLA_INET6_MCAST
/*****************************************************************
* Traffic control messages.
****/
struct tcmsg
{
unsigned char tcm_family;
unsigned char tcm__pad1;
unsigned short tcm__pad2;
int tcm_ifindex;
__u32 tcm_handle;
__u32 tcm_parent;
__u32 tcm_info;
};
enum
{
TCA_UNSPEC,
TCA_KIND,
TCA_OPTIONS,
TCA_STATS,
TCA_XSTATS,
TCA_RATE,
};
#define TCA_MAX TCA_RATE
#define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
#define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
/* SUMMARY: maximal rtattr understood by kernel */
#define RTATTR_MAX RTA_MAX
/* RTnetlink multicast groups */
#define RTMGRP_LINK 1
#define RTMGRP_NOTIFY 2
#define RTMGRP_NEIGH 4
#define RTMGRP_TC 8
#define RTMGRP_IPV4_IFADDR 0x10
#define RTMGRP_IPV4_MROUTE 0x20
#define RTMGRP_IPV4_ROUTE 0x40
#define RTMGRP_IPV6_IFADDR 0x100
#define RTMGRP_IPV6_MROUTE 0x200
#define RTMGRP_IPV6_ROUTE 0x400
#define RTMGRP_DECnet_IFADDR 0x1000
#define RTMGRP_DECnet_ROUTE 0x4000
/* End of information exported to user level */
#ifdef __KERNEL__
#include <linux/config.h>
static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
{
int len = strlen(str) + 1;
return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
}
extern int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len);
extern struct sock *rtnl;
struct rtnetlink_link
{
int (*doit)(struct sk_buff *, struct nlmsghdr*, void *attr);
int (*dumpit)(struct sk_buff *, struct netlink_callback *cb);
};
extern struct rtnetlink_link * rtnetlink_links[NPROTO];
extern int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb);
extern int rtnetlink_send(struct sk_buff *skb, u32 pid, u32 group, int echo);
extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
#define RTA_PUT(skb, attrtype, attrlen, data) \
({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
goto rtattr_failure; \
__rta_fill(skb, attrtype, attrlen, data); })
static inline struct rtattr *
__rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
{
struct rtattr *rta;
int size = RTA_LENGTH(attrlen);
rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
rta->rta_type = attrtype;
rta->rta_len = size;
return rta;
}
#define __RTA_PUT(skb, attrtype, attrlen) \
({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
goto rtattr_failure; \
__rta_reserve(skb, attrtype, attrlen); })
extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
extern struct semaphore rtnl_sem;
#define rtnl_exlock() do { } while(0)
#define rtnl_exunlock() do { } while(0)
#define rtnl_exlock_nowait() (0)
#define rtnl_shlock() down(&rtnl_sem)
#define rtnl_shlock_nowait() down_trylock(&rtnl_sem)
#define rtnl_shunlock() do { up(&rtnl_sem); \
if (rtnl && rtnl->sk_receive_queue.qlen) \
rtnl->sk_data_ready(rtnl, 0); \
} while(0)
extern void rtnl_lock(void);
extern void rtnl_unlock(void);
extern void rtnetlink_init(void);
#define ASSERT_RTNL() do { \
if (unlikely(down_trylock(&rtnl_sem) == 0)) { \
up(&rtnl_sem); \
printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
__FILE__, __LINE__); \
dump_stack(); \
} \
} while(0)
#define BUG_TRAP(x) do { \
if (unlikely(!(x))) { \
printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \
#x, __FILE__ , __LINE__); \
} \
} while(0)
#endif /* __KERNEL__ */
#endif /* __LINUX_RTNETLINK_H */