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Commit 4a5a8aa6 authored by stephen hemminger's avatar stephen hemminger Committed by David S. Miller
Browse files

ipv4: expose IPV4_DEVCONF 



IP sends device configuration (see inet_fill_link_af) as an array
in the netlink information, but the indices in that array are not
exposed to userspace through any current santized header file.

It was available back in 2.6.32 (in /usr/include/linux/sysctl.h)
but was broken by:
  commit 02291680
  Author: Eric W. Biederman <ebiederm@xmission.com>
  Date:   Sun Feb 14 03:25:51 2010 +0000

    net ipv4: Decouple ipv4 interface parameters from binary sysctl numbers

Eric was solving the sysctl problem but then the indices were re-exposed
by a later addition of devconf support for IPV4

  commit 9f0f7272
  Author: Thomas Graf <tgraf@infradead.org>
  Date:   Tue Nov 16 04:32:48 2010 +0000

    ipv4: AF_INET link address family

Putting them in /usr/include/linux/ip.h seemed the logical match
for the DEVCONF_ definitions for IPV6 in /usr/include/linux/ip6.h

Signed-off-by: default avatarStephen Hemminger <stephen@networkplumber.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c92a59ec

include/linux/inetdevice.h

+1 −33
Original line number Diff line number Diff line
@@ -5,45 +5,13 @@ 


#include <linux/bitmap.h>

#include <linux/if.h>

#include <linux/ip.h>

#include <linux/netdevice.h>

#include <linux/rcupdate.h>

#include <linux/timer.h>

#include <linux/sysctl.h>

#include <linux/rtnetlink.h>



enum

{

	IPV4_DEVCONF_FORWARDING=1,

	IPV4_DEVCONF_MC_FORWARDING,

	IPV4_DEVCONF_PROXY_ARP,

	IPV4_DEVCONF_ACCEPT_REDIRECTS,

	IPV4_DEVCONF_SECURE_REDIRECTS,

	IPV4_DEVCONF_SEND_REDIRECTS,

	IPV4_DEVCONF_SHARED_MEDIA,

	IPV4_DEVCONF_RP_FILTER,

	IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE,

	IPV4_DEVCONF_BOOTP_RELAY,

	IPV4_DEVCONF_LOG_MARTIANS,

	IPV4_DEVCONF_TAG,

	IPV4_DEVCONF_ARPFILTER,

	IPV4_DEVCONF_MEDIUM_ID,

	IPV4_DEVCONF_NOXFRM,

	IPV4_DEVCONF_NOPOLICY,

	IPV4_DEVCONF_FORCE_IGMP_VERSION,

	IPV4_DEVCONF_ARP_ANNOUNCE,

	IPV4_DEVCONF_ARP_IGNORE,

	IPV4_DEVCONF_PROMOTE_SECONDARIES,

	IPV4_DEVCONF_ARP_ACCEPT,

	IPV4_DEVCONF_ARP_NOTIFY,

	IPV4_DEVCONF_ACCEPT_LOCAL,

	IPV4_DEVCONF_SRC_VMARK,

	IPV4_DEVCONF_PROXY_ARP_PVLAN,

	IPV4_DEVCONF_ROUTE_LOCALNET,

	__IPV4_DEVCONF_MAX

};



#define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1)



struct ipv4_devconf {

	void	*sysctl;

	int	data[IPV4_DEVCONF_MAX];

include/uapi/linux/ip.h

+34 −0
Original line number Diff line number Diff line
@@ -133,4 +133,38 @@ struct ip_beet_phdr { 
	__u8 reserved;

};



/* index values for the variables in ipv4_devconf */

enum

{

	IPV4_DEVCONF_FORWARDING=1,

	IPV4_DEVCONF_MC_FORWARDING,

	IPV4_DEVCONF_PROXY_ARP,

	IPV4_DEVCONF_ACCEPT_REDIRECTS,

	IPV4_DEVCONF_SECURE_REDIRECTS,

	IPV4_DEVCONF_SEND_REDIRECTS,

	IPV4_DEVCONF_SHARED_MEDIA,

	IPV4_DEVCONF_RP_FILTER,

	IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE,

	IPV4_DEVCONF_BOOTP_RELAY,

	IPV4_DEVCONF_LOG_MARTIANS,

	IPV4_DEVCONF_TAG,

	IPV4_DEVCONF_ARPFILTER,

	IPV4_DEVCONF_MEDIUM_ID,

	IPV4_DEVCONF_NOXFRM,

	IPV4_DEVCONF_NOPOLICY,

	IPV4_DEVCONF_FORCE_IGMP_VERSION,

	IPV4_DEVCONF_ARP_ANNOUNCE,

	IPV4_DEVCONF_ARP_IGNORE,

	IPV4_DEVCONF_PROMOTE_SECONDARIES,

	IPV4_DEVCONF_ARP_ACCEPT,

	IPV4_DEVCONF_ARP_NOTIFY,

	IPV4_DEVCONF_ACCEPT_LOCAL,

	IPV4_DEVCONF_SRC_VMARK,

	IPV4_DEVCONF_PROXY_ARP_PVLAN,

	IPV4_DEVCONF_ROUTE_LOCALNET,

	__IPV4_DEVCONF_MAX

};



#define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1)



#endif /* _UAPI_LINUX_IP_H */