1
#ifndef __LINUX_RTNETLINK_H
2
#define __LINUX_RTNETLINK_H
4
#include <linux/types.h>
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#include <linux/netlink.h>
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#include <linux/if_link.h>
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#include <linux/if_addr.h>
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#include <linux/neighbour.h>
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/* rtnetlink families. Values up to 127 are reserved for real address
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* families, values above 128 may be used arbitrarily.
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#define RTNL_FAMILY_IPMR 128
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#define RTNL_FAMILY_IP6MR 129
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#define RTNL_FAMILY_MAX 129
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* Routing/neighbour discovery messages.
21
/* Types of messages */
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#define RTM_BASE RTM_BASE
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#define RTM_NEWLINK RTM_NEWLINK
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#define RTM_DELLINK RTM_DELLINK
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#define RTM_GETLINK RTM_GETLINK
34
#define RTM_SETLINK RTM_SETLINK
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#define RTM_NEWADDR RTM_NEWADDR
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#define RTM_DELADDR RTM_DELADDR
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#define RTM_GETADDR RTM_GETADDR
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#define RTM_NEWROUTE RTM_NEWROUTE
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#define RTM_DELROUTE RTM_DELROUTE
48
#define RTM_GETROUTE RTM_GETROUTE
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#define RTM_NEWNEIGH RTM_NEWNEIGH
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#define RTM_DELNEIGH RTM_DELNEIGH
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#define RTM_GETNEIGH RTM_GETNEIGH
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#define RTM_NEWRULE RTM_NEWRULE
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#define RTM_DELRULE RTM_DELRULE
62
#define RTM_GETRULE RTM_GETRULE
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#define RTM_NEWQDISC RTM_NEWQDISC
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#define RTM_DELQDISC RTM_DELQDISC
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#define RTM_GETQDISC RTM_GETQDISC
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#define RTM_NEWTCLASS RTM_NEWTCLASS
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#define RTM_DELTCLASS RTM_DELTCLASS
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#define RTM_GETTCLASS RTM_GETTCLASS
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#define RTM_NEWTFILTER RTM_NEWTFILTER
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#define RTM_DELTFILTER RTM_DELTFILTER
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#define RTM_GETTFILTER RTM_GETTFILTER
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#define RTM_NEWACTION RTM_NEWACTION
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#define RTM_DELACTION RTM_DELACTION
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#define RTM_GETACTION RTM_GETACTION
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#define RTM_NEWPREFIX RTM_NEWPREFIX
95
RTM_GETMULTICAST = 58,
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#define RTM_GETMULTICAST RTM_GETMULTICAST
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#define RTM_GETANYCAST RTM_GETANYCAST
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RTM_NEWNEIGHTBL = 64,
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#define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
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RTM_GETNEIGHTBL = 66,
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#define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
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#define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
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RTM_NEWNDUSEROPT = 68,
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#define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
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RTM_NEWADDRLABEL = 72,
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#define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
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#define RTM_DELADDRLABEL RTM_DELADDRLABEL
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#define RTM_GETADDRLABEL RTM_GETADDRLABEL
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#define RTM_GETDCB RTM_GETDCB
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#define RTM_SETDCB RTM_SETDCB
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#define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1)
127
#define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
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#define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
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#define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2)
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Generic structure for encapsulation of optional route information.
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It is reminiscent of sockaddr, but with sa_family replaced
138
unsigned short rta_len;
139
unsigned short rta_type;
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/* Macros to handle rtattributes */
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#define RTA_ALIGNTO 4
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#define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
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#define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
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(rta)->rta_len >= sizeof(struct rtattr) && \
148
(rta)->rta_len <= (len))
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#define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
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(struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
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#define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
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#define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len))
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#define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
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#define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
159
/******************************************************************************
160
* Definitions used in routing table administration.
164
unsigned char rtm_family;
165
unsigned char rtm_dst_len;
166
unsigned char rtm_src_len;
167
unsigned char rtm_tos;
169
unsigned char rtm_table; /* Routing table id */
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unsigned char rtm_protocol; /* Routing protocol; see below */
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unsigned char rtm_scope; /* See below */
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unsigned char rtm_type; /* See below */
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RTN_UNICAST, /* Gateway or direct route */
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RTN_LOCAL, /* Accept locally */
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RTN_BROADCAST, /* Accept locally as broadcast,
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RTN_ANYCAST, /* Accept locally as broadcast,
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but send as unicast */
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RTN_MULTICAST, /* Multicast route */
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RTN_BLACKHOLE, /* Drop */
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RTN_UNREACHABLE, /* Destination is unreachable */
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RTN_PROHIBIT, /* Administratively prohibited */
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RTN_THROW, /* Not in this table */
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RTN_NAT, /* Translate this address */
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RTN_XRESOLVE, /* Use external resolver */
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#define RTN_MAX (__RTN_MAX - 1)
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#define RTPROT_UNSPEC 0
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#define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects;
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not used by current IPv4 */
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#define RTPROT_KERNEL 2 /* Route installed by kernel */
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#define RTPROT_BOOT 3 /* Route installed during boot */
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#define RTPROT_STATIC 4 /* Route installed by administrator */
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/* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
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they are just passed from user and back as is.
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It will be used by hypothetical multiple routing daemons.
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Note that protocol values should be standardized in order to
216
#define RTPROT_GATED 8 /* Apparently, GateD */
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#define RTPROT_RA 9 /* RDISC/ND router advertisements */
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#define RTPROT_MRT 10 /* Merit MRT */
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#define RTPROT_ZEBRA 11 /* Zebra */
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#define RTPROT_BIRD 12 /* BIRD */
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#define RTPROT_DNROUTED 13 /* DECnet routing daemon */
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#define RTPROT_XORP 14 /* XORP */
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#define RTPROT_NTK 15 /* Netsukuku */
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#define RTPROT_DHCP 16 /* DHCP client */
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Really it is not scope, but sort of distance to the destination.
229
NOWHERE are reserved for not existing destinations, HOST is our
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local addresses, LINK are destinations, located on directly attached
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link and UNIVERSE is everywhere in the Universe.
233
Intermediate values are also possible f.e. interior routes
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could be assigned a value between UNIVERSE and LINK.
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/* User defined values */
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#define RTM_F_NOTIFY 0x100 /* Notify user of route change */
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#define RTM_F_CLONED 0x200 /* This route is cloned */
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#define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */
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#define RTM_F_PREFIX 0x800 /* Prefix addresses */
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/* Reserved table identifiers */
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/* User defined values */
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RT_TABLE_DEFAULT=253,
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RT_TABLE_MAX=0xFFFFFFFF
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/* Routing message attributes */
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RTA_PROTOINFO, /* no longer used */
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RTA_SESSION, /* no longer used */
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RTA_MP_ALGO, /* no longer used */
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#define RTA_MAX (__RTA_MAX - 1)
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#define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
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#define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
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/* RTM_MULTIPATH --- array of struct rtnexthop.
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* "struct rtnexthop" describes all necessary nexthop information,
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* i.e. parameters of path to a destination via this nexthop.
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* At the moment it is impossible to set different prefsrc, mtu, window
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* and rtt for different paths from multipath.
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unsigned short rtnh_len;
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unsigned char rtnh_flags;
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unsigned char rtnh_hops;
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#define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */
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#define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */
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#define RTNH_F_ONLINK 4 /* Gateway is forced on link */
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/* Macros to handle hexthops */
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#define RTNH_ALIGNTO 4
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#define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
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#define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
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((int)(rtnh)->rtnh_len) <= (len))
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#define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
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#define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
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#define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
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#define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
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struct rta_cacheinfo {
336
#define RTNETLINK_HAVE_PEERINFO 1
342
/* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
346
#define RTAX_UNSPEC RTAX_UNSPEC
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#define RTAX_LOCK RTAX_LOCK
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#define RTAX_MTU RTAX_MTU
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#define RTAX_WINDOW RTAX_WINDOW
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#define RTAX_RTT RTAX_RTT
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#define RTAX_RTTVAR RTAX_RTTVAR
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#define RTAX_SSTHRESH RTAX_SSTHRESH
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#define RTAX_CWND RTAX_CWND
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#define RTAX_ADVMSS RTAX_ADVMSS
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#define RTAX_REORDERING RTAX_REORDERING
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#define RTAX_HOPLIMIT RTAX_HOPLIMIT
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#define RTAX_INITCWND RTAX_INITCWND
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#define RTAX_FEATURES RTAX_FEATURES
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#define RTAX_RTO_MIN RTAX_RTO_MIN
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#define RTAX_INITRWND RTAX_INITRWND
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#define RTAX_MAX (__RTAX_MAX - 1)
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#define RTAX_FEATURE_ECN 0x00000001
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#define RTAX_FEATURE_SACK 0x00000002
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#define RTAX_FEATURE_TIMESTAMP 0x00000004
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#define RTAX_FEATURE_ALLFRAG 0x00000008
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* General form of address family dependent message.
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unsigned char rtgen_family;
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/*****************************************************************
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* Link layer specific messages.
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* passes link level specific information, not dependent
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* on network protocol.
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unsigned char ifi_family;
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unsigned char __ifi_pad;
426
unsigned short ifi_type; /* ARPHRD_* */
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int ifi_index; /* Link index */
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unsigned ifi_flags; /* IFF_* flags */
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unsigned ifi_change; /* IFF_* change mask */
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/********************************************************************
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unsigned char prefix_family;
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unsigned char prefix_pad1;
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unsigned short prefix_pad2;
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unsigned char prefix_type;
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unsigned char prefix_len;
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unsigned char prefix_flags;
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unsigned char prefix_pad3;
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#define PREFIX_MAX (__PREFIX_MAX - 1)
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struct prefix_cacheinfo {
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__u32 preferred_time;
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/*****************************************************************
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* Traffic control messages.
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unsigned char tcm_family;
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unsigned char tcm__pad1;
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unsigned short tcm__pad2;
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#define TCA_MAX (__TCA_MAX - 1)
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#define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
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#define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
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/********************************************************************
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* Neighbor Discovery userland options
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struct nduseroptmsg {
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unsigned char nduseropt_family;
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unsigned char nduseropt_pad1;
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unsigned short nduseropt_opts_len; /* Total length of options */
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int nduseropt_ifindex;
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__u8 nduseropt_icmp_type;
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__u8 nduseropt_icmp_code;
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unsigned short nduseropt_pad2;
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unsigned int nduseropt_pad3;
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/* Followed by one or more ND options */
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#define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1)
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/* RTnetlink multicast groups - backwards compatibility for userspace */
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#define RTMGRP_LINK 1
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#define RTMGRP_NOTIFY 2
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#define RTMGRP_NEIGH 4
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#define RTMGRP_IPV4_IFADDR 0x10
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#define RTMGRP_IPV4_MROUTE 0x20
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#define RTMGRP_IPV4_ROUTE 0x40
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#define RTMGRP_IPV4_RULE 0x80
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#define RTMGRP_IPV6_IFADDR 0x100
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#define RTMGRP_IPV6_MROUTE 0x200
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#define RTMGRP_IPV6_ROUTE 0x400
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#define RTMGRP_IPV6_IFINFO 0x800
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#define RTMGRP_DECnet_IFADDR 0x1000
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#define RTMGRP_DECnet_ROUTE 0x4000
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#define RTMGRP_IPV6_PREFIX 0x20000
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/* RTnetlink multicast groups */
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enum rtnetlink_groups {
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#define RTNLGRP_NONE RTNLGRP_NONE
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#define RTNLGRP_LINK RTNLGRP_LINK
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#define RTNLGRP_NOTIFY RTNLGRP_NOTIFY
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#define RTNLGRP_NEIGH RTNLGRP_NEIGH
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#define RTNLGRP_TC RTNLGRP_TC
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#define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR
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#define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE
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#define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE
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#define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE
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#define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR
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#define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE
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#define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE
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#define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO
570
RTNLGRP_DECnet_IFADDR,
571
#define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR
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RTNLGRP_DECnet_ROUTE,
574
#define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE
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#define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE
579
#define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX
581
#define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE
583
#define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT
584
RTNLGRP_PHONET_IFADDR,
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#define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR
586
RTNLGRP_PHONET_ROUTE,
587
#define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE
589
#define RTNLGRP_DCB RTNLGRP_DCB
592
#define RTNLGRP_MAX (__RTNLGRP_MAX - 1)
594
/* TC action piece */
596
unsigned char tca_family;
597
unsigned char tca__pad1;
598
unsigned short tca__pad2;
600
#define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
601
#define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
602
#define TCA_ACT_TAB 1 /* attr type must be >=1 */
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/* End of information exported to user level */
609
#include <linux/mutex.h>
610
#include <linux/netdevice.h>
612
static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
614
int len = strlen(str) + 1;
615
return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
618
extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
619
extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
620
extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
621
u32 group, struct nlmsghdr *nlh, gfp_t flags);
622
extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
623
extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
624
extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
625
u32 id, u32 ts, u32 tsage, long expires,
628
extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
630
#define RTA_PUT(skb, attrtype, attrlen, data) \
631
({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
632
goto rtattr_failure; \
633
__rta_fill(skb, attrtype, attrlen, data); })
635
#define RTA_APPEND(skb, attrlen, data) \
636
({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
637
goto rtattr_failure; \
638
memcpy(skb_put(skb, attrlen), data, attrlen); })
640
#define RTA_PUT_NOHDR(skb, attrlen, data) \
641
({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
642
memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
643
RTA_ALIGN(attrlen) - attrlen); })
645
#define RTA_PUT_U8(skb, attrtype, value) \
646
({ u8 _tmp = (value); \
647
RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
649
#define RTA_PUT_U16(skb, attrtype, value) \
650
({ u16 _tmp = (value); \
651
RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
653
#define RTA_PUT_U32(skb, attrtype, value) \
654
({ u32 _tmp = (value); \
655
RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
657
#define RTA_PUT_U64(skb, attrtype, value) \
658
({ u64 _tmp = (value); \
659
RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
661
#define RTA_PUT_SECS(skb, attrtype, value) \
662
RTA_PUT_U64(skb, attrtype, (value) / HZ)
664
#define RTA_PUT_MSECS(skb, attrtype, value) \
665
RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
667
#define RTA_PUT_STRING(skb, attrtype, value) \
668
RTA_PUT(skb, attrtype, strlen(value) + 1, value)
670
#define RTA_PUT_FLAG(skb, attrtype) \
671
RTA_PUT(skb, attrtype, 0, NULL);
673
#define RTA_NEST(skb, type) \
674
({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
675
RTA_PUT(skb, type, 0, NULL); \
678
#define RTA_NEST_END(skb, start) \
679
({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
682
#define RTA_NEST_COMPAT(skb, type, attrlen, data) \
683
({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
684
RTA_PUT(skb, type, attrlen, data); \
685
RTA_NEST(skb, type); \
688
#define RTA_NEST_COMPAT_END(skb, start) \
689
({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
690
(start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
691
RTA_NEST_END(skb, __nest); \
694
#define RTA_NEST_CANCEL(skb, start) \
696
skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
699
#define RTA_GET_U8(rta) \
700
({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
701
goto rtattr_failure; \
702
*(u8 *) RTA_DATA(rta); })
704
#define RTA_GET_U16(rta) \
705
({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
706
goto rtattr_failure; \
707
*(u16 *) RTA_DATA(rta); })
709
#define RTA_GET_U32(rta) \
710
({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
711
goto rtattr_failure; \
712
*(u32 *) RTA_DATA(rta); })
714
#define RTA_GET_U64(rta) \
716
if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
717
goto rtattr_failure; \
718
memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
721
#define RTA_GET_FLAG(rta) (!!(rta))
723
#define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
724
#define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
726
static inline struct rtattr *
727
__rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
730
int size = RTA_LENGTH(attrlen);
732
rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
733
rta->rta_type = attrtype;
735
memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
739
#define __RTA_PUT(skb, attrtype, attrlen) \
740
({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
741
goto rtattr_failure; \
742
__rta_reserve(skb, attrtype, attrlen); })
744
extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
746
/* RTNL is used as a global lock for all changes to network configuration */
747
extern void rtnl_lock(void);
748
extern void rtnl_unlock(void);
749
extern int rtnl_trylock(void);
750
extern int rtnl_is_locked(void);
751
#ifdef CONFIG_PROVE_LOCKING
752
extern int lockdep_rtnl_is_held(void);
753
#endif /* #ifdef CONFIG_PROVE_LOCKING */
756
* rcu_dereference_rtnl - rcu_dereference with debug checking
757
* @p: The pointer to read, prior to dereferencing
759
* Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
760
* or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
762
#define rcu_dereference_rtnl(p) \
763
rcu_dereference_check(p, lockdep_rtnl_is_held())
766
* rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
767
* @p: The pointer to read, prior to dereferencing
769
* Return the value of the specified RCU-protected pointer, but omit
770
* both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
773
#define rtnl_dereference(p) \
774
rcu_dereference_protected(p, lockdep_rtnl_is_held())
776
static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
778
return rtnl_dereference(dev->ingress_queue);
781
extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
783
extern void rtnetlink_init(void);
784
extern void __rtnl_unlock(void);
786
#define ASSERT_RTNL() do { \
787
if (unlikely(!rtnl_is_locked())) { \
788
printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
789
__FILE__, __LINE__); \
794
static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
796
return RTA_GET_U32(rta[RTA_TABLE-1]);
801
#endif /* __KERNEL__ */
804
#endif /* __LINUX_RTNETLINK_H */