[DCCP]: Move the IPv4 specific bits from proto.c to ipv4.c

With this patch in place we can break down the complexity by better
compartmentalizing the code that is common to ipv6 and ipv4.

Now we have these modules:
Module                  Size  Used by
dccp_diag               1344  0
inet_diag               9448  1 dccp_diag
dccp_ccid3             15856  0
dccp_tfrc_lib          12320  1 dccp_ccid3
dccp_ccid2              5764  0
dccp_ipv4              16996  2
dccp                   48208  4 dccp_diag,dccp_ccid3,dccp_ccid2,dccp_ipv4

dccp_ipv6 still requires dccp_ipv4 due to dccp_ipv6_mapped, that is
the next target to work on the "hey, ipv4 is legacy, I only want ipv6
dude!" direction.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/dccp/options.c b/net/dccp/options.c
index 3ecd319c0f59..79d228e4d6b2 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -258,6 +258,8 @@ out_invalid_option:
         return -1;
 }
 
+EXPORT_SYMBOL_GPL(dccp_parse_options);
+
 static void dccp_encode_value_var(const u32 value, unsigned char *to,
                                   const unsigned int len)
 {