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Commit 12a4bbd1 authored by Subash Abhinov Kasiviswanathan's avatar Subash Abhinov Kasiviswanathan
Browse files

net: ipv6: addrconf: IPv6 tethering enhancement 



Added new procfs flag to toggle the automatic addition of prefix
routes on a per device basis. The new flag is accept_ra_prefix_route.
Defaults to 1 as to not break existing behavior.

CRs-Fixed: 2197954
Change-Id: If25493890c7531c27f5b2c4855afebbbbf5d072a
Signed-off-by: default avatarSubash Abhinov Kasiviswanathan <subashab@codeaurora.org>
parent 17eb0120

Documentation/networking/ip-sysctl.txt

+5 −0
Original line number Diff line number Diff line
@@ -1531,6 +1531,11 @@ accept_ra_mtu - BOOLEAN 
	Functional default: enabled if accept_ra is enabled.

			    disabled if accept_ra is disabled.



accept_ra_prefix_route - BOOLEAN

	Set the prefix route for the autoconfigured interface address



	Functional default: enabled



accept_redirects - BOOLEAN

	Accept Redirects.

include/linux/ipv6.h

+1 −1
Original line number Diff line number Diff line
@@ -74,7 +74,7 @@ struct ipv6_devconf { 
	__u32		enhanced_dad;

	__u32		addr_gen_mode;

	__s32		disable_policy;



	__s32		accept_ra_prefix_route;

	struct ctl_table_header *sysctl_header;

};

include/uapi/linux/ipv6.h

+1 −0
Original line number Diff line number Diff line
@@ -187,6 +187,7 @@ enum { 
	DEVCONF_ADDR_GEN_MODE,

	DEVCONF_DISABLE_POLICY,

	DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,

	DEVCONF_ACCEPT_RA_PREFIX_ROUTE,

	DEVCONF_MAX

};

kernel/sysctl_binary.c

+1 −0
Original line number Diff line number Diff line
@@ -528,6 +528,7 @@ static const struct bin_table bin_net_ipv6_conf_var_table[] = { 
	{ CTL_INT,	NET_IPV6_PROXY_NDP,			"proxy_ndp" },

	{ CTL_INT,	NET_IPV6_ACCEPT_SOURCE_ROUTE,		"accept_source_route" },

	{ CTL_INT,	NET_IPV6_ACCEPT_RA_FROM_LOCAL,		"accept_ra_from_local" },

	{ CTL_INT, NET_IPV6_ACCEPT_RA_PREFIX_ROUTE, "accept_ra_prefix_route" },

	{}

};

net/ipv6/addrconf.c

+14 −2
Original line number Diff line number Diff line
@@ -249,6 +249,7 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = { 
	.enhanced_dad           = 1,

	.addr_gen_mode		= IN6_ADDR_GEN_MODE_EUI64,

	.disable_policy		= 0,

	.accept_ra_prefix_route = 1,

};



static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
@@ -304,6 +305,7 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { 
	.enhanced_dad           = 1,

	.addr_gen_mode		= IN6_ADDR_GEN_MODE_EUI64,

	.disable_policy		= 0,

	.accept_ra_prefix_route = 1,

};



/* Check if link is ready: is it up and is a valid qdisc available */
@@ -2680,9 +2682,12 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) 
				flags |= RTF_EXPIRES;

				expires = jiffies_to_clock_t(rt_expires);

			}

			addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,

			if (dev->ip6_ptr->cnf.accept_ra_prefix_route) {

				addrconf_prefix_route(&pinfo->prefix,

						      pinfo->prefix_len,

						      dev, expires, flags);

			}

		}

		ip6_rt_put(rt);

	}
@@ -6386,6 +6391,13 @@ static const struct ctl_table addrconf_sysctl[] = { 
		.mode           = 0644,

		.proc_handler   = proc_dointvec,

	},

	{

		.procname	= "accept_ra_prefix_route",

		.data		= &ipv6_devconf.accept_ra_prefix_route,

		.maxlen		= sizeof(int),

		.mode		= 0644,

		.proc_handler	= proc_dointvec,

	},

#ifdef CONFIG_IPV6_SEG6_HMAC

	{

		.procname	= "seg6_require_hmac",