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>

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) {