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net: ipv6: add support for rpl sr exthdr

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This patch adds rpl source routing receive handling. Everything works
only if sysconf "rpl_seg_enabled" and source routing is enabled. Mostly
the same behaviour as IPv6 segmentation routing. To handle compression
and uncompression a rpl.c file is created which contains the necessary
functionality. The receive handling will also care about IPv6
encapsulated so far it's specified as possible nexthdr in RFC 6554.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Aring
2020-03-27 18:00:20 -04:00
committed by David S. Miller
parent f37c605936
commit 8610c7c6e3
7 changed files with 370 additions and 3 deletions
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10
net/ipv6/addrconf.c
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@@ -236,6 +236,7 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = {
.enhanced_dad = 1,
.addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64,
.disable_policy = 0,
.rpl_seg_enabled = 0,
};
static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
@@ -290,6 +291,7 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
.enhanced_dad = 1,
.addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64,
.disable_policy = 0,
.rpl_seg_enabled = 0,
};
/* Check if link is ready: is it up and is a valid qdisc available */
@@ -5520,6 +5522,7 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
array[DEVCONF_ADDR_GEN_MODE] = cnf->addr_gen_mode;
array[DEVCONF_DISABLE_POLICY] = cnf->disable_policy;
array[DEVCONF_NDISC_TCLASS] = cnf->ndisc_tclass;
array[DEVCONF_RPL_SEG_ENABLED] = cnf->rpl_seg_enabled;
}
static inline size_t inet6_ifla6_size(void)
@@ -6900,6 +6903,13 @@ static const struct ctl_table addrconf_sysctl[] = {
.extra1 = (void *)SYSCTL_ZERO,
.extra2 = (void *)&two_five_five,
},
{
.procname = "rpl_seg_enabled",
.data = &ipv6_devconf.rpl_seg_enabled,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
/* sentinel */
}