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authorDavid S. Miller <davem@davemloft.net>2012-07-11 23:26:46 -0700
committerDavid S. Miller <davem@davemloft.net>2012-07-11 23:39:11 -0700
commit30f2a5f379d0b4b4e733df138a49e054ebf75ff8 (patch)
treeddd818a29e28e49b1916d3e9dba62c1272912f5f /net/ipv6/ndisc.c
parent1f42539d257af671d56d4bdbcf13aef31abff6ef (diff)
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ipv6: Export ndisc option parsing from ndisc.c
This is going to be used internally by the rt6 redirect code. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ndisc.c')
-rw-r--r--net/ipv6/ndisc.c47
1 files changed, 2 insertions, 45 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 0fddd571400d..a3189baa9f4f 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -143,40 +143,8 @@ struct neigh_table nd_tbl = {
.gc_thresh3 = 1024,
};
-/* ND options */
-struct ndisc_options {
- struct nd_opt_hdr *nd_opt_array[__ND_OPT_ARRAY_MAX];
-#ifdef CONFIG_IPV6_ROUTE_INFO
- struct nd_opt_hdr *nd_opts_ri;
- struct nd_opt_hdr *nd_opts_ri_end;
-#endif
- struct nd_opt_hdr *nd_useropts;
- struct nd_opt_hdr *nd_useropts_end;
-};
-
-#define nd_opts_src_lladdr nd_opt_array[ND_OPT_SOURCE_LL_ADDR]
-#define nd_opts_tgt_lladdr nd_opt_array[ND_OPT_TARGET_LL_ADDR]
-#define nd_opts_pi nd_opt_array[ND_OPT_PREFIX_INFO]
-#define nd_opts_pi_end nd_opt_array[__ND_OPT_PREFIX_INFO_END]
-#define nd_opts_rh nd_opt_array[ND_OPT_REDIRECT_HDR]
-#define nd_opts_mtu nd_opt_array[ND_OPT_MTU]
-
#define NDISC_OPT_SPACE(len) (((len)+2+7)&~7)
-/*
- * Return the padding between the option length and the start of the
- * link addr. Currently only IP-over-InfiniBand needs this, although
- * if RFC 3831 IPv6-over-Fibre Channel is ever implemented it may
- * also need a pad of 2.
- */
-static int ndisc_addr_option_pad(unsigned short type)
-{
- switch (type) {
- case ARPHRD_INFINIBAND: return 2;
- default: return 0;
- }
-}
-
static inline int ndisc_opt_addr_space(struct net_device *dev)
{
return NDISC_OPT_SPACE(dev->addr_len + ndisc_addr_option_pad(dev->type));
@@ -233,8 +201,8 @@ static struct nd_opt_hdr *ndisc_next_useropt(struct nd_opt_hdr *cur,
return cur <= end && ndisc_is_useropt(cur) ? cur : NULL;
}
-static struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
- struct ndisc_options *ndopts)
+struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
+ struct ndisc_options *ndopts)
{
struct nd_opt_hdr *nd_opt = (struct nd_opt_hdr *)opt;
@@ -297,17 +265,6 @@ static struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
return ndopts;
}
-static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p,
- struct net_device *dev)
-{
- u8 *lladdr = (u8 *)(p + 1);
- int lladdrlen = p->nd_opt_len << 3;
- int prepad = ndisc_addr_option_pad(dev->type);
- if (lladdrlen != NDISC_OPT_SPACE(dev->addr_len + prepad))
- return NULL;
- return lladdr + prepad;
-}
-
int ndisc_mc_map(const struct in6_addr *addr, char *buf, struct net_device *dev, int dir)
{
switch (dev->type) {