mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-22 02:20:40 +00:00
18ac597af2
In most situations the neighbor discovery cache should be cleared on a NOCARRIER event which is currently done unconditionally. But for wireless roams the neighbor discovery cache can and should remain intact since the underlying network has not changed. This patch introduces a sysctl option ndisc_evict_nocarrier which can be disabled by a wireless supplicant during a roam. This allows packets to be sent after a roam immediately without having to wait for neighbor discovery. A user reported roughly a 1 second delay after a roam before packets could be sent out (note, on IPv4). This delay was due to the ARP cache being cleared. During testing of this same scenario using IPv6 no delay was noticed, but regardless there is no reason to clear the ndisc cache for wireless roams. Signed-off-by: James Prestwood <prestwoj@gmail.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
201 lines
4.1 KiB
C
201 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
#ifndef _UAPI_IPV6_H
|
|
#define _UAPI_IPV6_H
|
|
|
|
#include <linux/libc-compat.h>
|
|
#include <linux/types.h>
|
|
#include <linux/in6.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
/* The latest drafts declared increase in minimal mtu up to 1280. */
|
|
|
|
#define IPV6_MIN_MTU 1280
|
|
|
|
/*
|
|
* Advanced API
|
|
* source interface/address selection, source routing, etc...
|
|
* *under construction*
|
|
*/
|
|
|
|
#if __UAPI_DEF_IN6_PKTINFO
|
|
struct in6_pktinfo {
|
|
struct in6_addr ipi6_addr;
|
|
int ipi6_ifindex;
|
|
};
|
|
#endif
|
|
|
|
#if __UAPI_DEF_IP6_MTUINFO
|
|
struct ip6_mtuinfo {
|
|
struct sockaddr_in6 ip6m_addr;
|
|
__u32 ip6m_mtu;
|
|
};
|
|
#endif
|
|
|
|
struct in6_ifreq {
|
|
struct in6_addr ifr6_addr;
|
|
__u32 ifr6_prefixlen;
|
|
int ifr6_ifindex;
|
|
};
|
|
|
|
#define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
|
|
#define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
|
|
#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
|
|
#define IPV6_SRCRT_TYPE_3 3 /* RPL Segment Routing with IPv6 */
|
|
#define IPV6_SRCRT_TYPE_4 4 /* Segment Routing with IPv6 */
|
|
|
|
/*
|
|
* routing header
|
|
*/
|
|
struct ipv6_rt_hdr {
|
|
__u8 nexthdr;
|
|
__u8 hdrlen;
|
|
__u8 type;
|
|
__u8 segments_left;
|
|
|
|
/*
|
|
* type specific data
|
|
* variable length field
|
|
*/
|
|
};
|
|
|
|
|
|
struct ipv6_opt_hdr {
|
|
__u8 nexthdr;
|
|
__u8 hdrlen;
|
|
/*
|
|
* TLV encoded option data follows.
|
|
*/
|
|
} __attribute__((packed)); /* required for some archs */
|
|
|
|
#define ipv6_destopt_hdr ipv6_opt_hdr
|
|
#define ipv6_hopopt_hdr ipv6_opt_hdr
|
|
|
|
/* Router Alert option values (RFC2711) */
|
|
#define IPV6_OPT_ROUTERALERT_MLD 0x0000 /* MLD(RFC2710) */
|
|
|
|
/*
|
|
* routing header type 0 (used in cmsghdr struct)
|
|
*/
|
|
|
|
struct rt0_hdr {
|
|
struct ipv6_rt_hdr rt_hdr;
|
|
__u32 reserved;
|
|
struct in6_addr addr[0];
|
|
|
|
#define rt0_type rt_hdr.type
|
|
};
|
|
|
|
/*
|
|
* routing header type 2
|
|
*/
|
|
|
|
struct rt2_hdr {
|
|
struct ipv6_rt_hdr rt_hdr;
|
|
__u32 reserved;
|
|
struct in6_addr addr;
|
|
|
|
#define rt2_type rt_hdr.type
|
|
};
|
|
|
|
/*
|
|
* home address option in destination options header
|
|
*/
|
|
|
|
struct ipv6_destopt_hao {
|
|
__u8 type;
|
|
__u8 length;
|
|
struct in6_addr addr;
|
|
} __attribute__((packed));
|
|
|
|
/*
|
|
* IPv6 fixed header
|
|
*
|
|
* BEWARE, it is incorrect. The first 4 bits of flow_lbl
|
|
* are glued to priority now, forming "class".
|
|
*/
|
|
|
|
struct ipv6hdr {
|
|
#if defined(__LITTLE_ENDIAN_BITFIELD)
|
|
__u8 priority:4,
|
|
version:4;
|
|
#elif defined(__BIG_ENDIAN_BITFIELD)
|
|
__u8 version:4,
|
|
priority:4;
|
|
#else
|
|
#error "Please fix <asm/byteorder.h>"
|
|
#endif
|
|
__u8 flow_lbl[3];
|
|
|
|
__be16 payload_len;
|
|
__u8 nexthdr;
|
|
__u8 hop_limit;
|
|
|
|
struct in6_addr saddr;
|
|
struct in6_addr daddr;
|
|
};
|
|
|
|
|
|
/* index values for the variables in ipv6_devconf */
|
|
enum {
|
|
DEVCONF_FORWARDING = 0,
|
|
DEVCONF_HOPLIMIT,
|
|
DEVCONF_MTU6,
|
|
DEVCONF_ACCEPT_RA,
|
|
DEVCONF_ACCEPT_REDIRECTS,
|
|
DEVCONF_AUTOCONF,
|
|
DEVCONF_DAD_TRANSMITS,
|
|
DEVCONF_RTR_SOLICITS,
|
|
DEVCONF_RTR_SOLICIT_INTERVAL,
|
|
DEVCONF_RTR_SOLICIT_DELAY,
|
|
DEVCONF_USE_TEMPADDR,
|
|
DEVCONF_TEMP_VALID_LFT,
|
|
DEVCONF_TEMP_PREFERED_LFT,
|
|
DEVCONF_REGEN_MAX_RETRY,
|
|
DEVCONF_MAX_DESYNC_FACTOR,
|
|
DEVCONF_MAX_ADDRESSES,
|
|
DEVCONF_FORCE_MLD_VERSION,
|
|
DEVCONF_ACCEPT_RA_DEFRTR,
|
|
DEVCONF_ACCEPT_RA_PINFO,
|
|
DEVCONF_ACCEPT_RA_RTR_PREF,
|
|
DEVCONF_RTR_PROBE_INTERVAL,
|
|
DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
|
|
DEVCONF_PROXY_NDP,
|
|
DEVCONF_OPTIMISTIC_DAD,
|
|
DEVCONF_ACCEPT_SOURCE_ROUTE,
|
|
DEVCONF_MC_FORWARDING,
|
|
DEVCONF_DISABLE_IPV6,
|
|
DEVCONF_ACCEPT_DAD,
|
|
DEVCONF_FORCE_TLLAO,
|
|
DEVCONF_NDISC_NOTIFY,
|
|
DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
|
|
DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
|
|
DEVCONF_SUPPRESS_FRAG_NDISC,
|
|
DEVCONF_ACCEPT_RA_FROM_LOCAL,
|
|
DEVCONF_USE_OPTIMISTIC,
|
|
DEVCONF_ACCEPT_RA_MTU,
|
|
DEVCONF_STABLE_SECRET,
|
|
DEVCONF_USE_OIF_ADDRS_ONLY,
|
|
DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
|
|
DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
|
|
DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
|
|
DEVCONF_DROP_UNSOLICITED_NA,
|
|
DEVCONF_KEEP_ADDR_ON_DOWN,
|
|
DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
|
|
DEVCONF_SEG6_ENABLED,
|
|
DEVCONF_SEG6_REQUIRE_HMAC,
|
|
DEVCONF_ENHANCED_DAD,
|
|
DEVCONF_ADDR_GEN_MODE,
|
|
DEVCONF_DISABLE_POLICY,
|
|
DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,
|
|
DEVCONF_NDISC_TCLASS,
|
|
DEVCONF_RPL_SEG_ENABLED,
|
|
DEVCONF_RA_DEFRTR_METRIC,
|
|
DEVCONF_IOAM6_ENABLED,
|
|
DEVCONF_IOAM6_ID,
|
|
DEVCONF_IOAM6_ID_WIDE,
|
|
DEVCONF_NDISC_EVICT_NOCARRIER,
|
|
DEVCONF_MAX
|
|
};
|
|
|
|
|
|
#endif /* _UAPI_IPV6_H */
|