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authorGerrit Renker <gerrit@erg.abdn.ac.uk>2008-07-13 11:51:40 +0100
committerGerrit Renker <gerrit@erg.abdn.ac.uk>2008-07-13 11:51:40 +0100
commit5b5d0e704880addfd979c262e6441f126708539c (patch)
tree1b3bff6cd378c858ab245de3a40c3510d4ba4745 /net/dccp/options.c
parent2013c7e35aeba39777f9b3eef8a70207b3931152 (diff)
dccp: Upgrade NDP count from 3 to 6 bytes
RFC 4340, 7.7 specifies up to 6 bytes for the NDP Count option, whereas the code is currently limited to up to 3 bytes. This seems to be a relict of an earlier draft version and is brought up to date by the patch. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Diffstat (limited to 'net/dccp/options.c')
-rw-r--r--net/dccp/options.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/net/dccp/options.c b/net/dccp/options.c
index 43bc24e761d..dc7c158a2f4 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -124,12 +124,12 @@ int dccp_parse_options(struct sock *sk, struct dccp_request_sock *dreq,
mandatory = 1;
break;
case DCCPO_NDP_COUNT:
- if (len > 3)
+ if (len > 6)
goto out_invalid_option;
opt_recv->dccpor_ndp = dccp_decode_value_var(value, len);
- dccp_pr_debug("%s rx opt: NDP count=%d\n", dccp_role(sk),
- opt_recv->dccpor_ndp);
+ dccp_pr_debug("%s opt: NDP count=%llu\n", dccp_role(sk),
+ (unsigned long long)opt_recv->dccpor_ndp);
break;
case DCCPO_CHANGE_L:
/* fall through */
@@ -307,9 +307,11 @@ static void dccp_encode_value_var(const u32 value, unsigned char *to,
*to++ = (value & 0xFF);
}
-static inline int dccp_ndp_len(const int ndp)
+static inline u8 dccp_ndp_len(const u64 ndp)
{
- return likely(ndp <= 0xFF) ? 1 : ndp <= 0xFFFF ? 2 : 3;
+ if (likely(ndp <= 0xFF))
+ return 1;
+ return likely(ndp <= USHORT_MAX) ? 2 : (ndp <= UINT_MAX ? 4 : 6);
}
int dccp_insert_option(struct sock *sk, struct sk_buff *skb,
@@ -336,7 +338,7 @@ EXPORT_SYMBOL_GPL(dccp_insert_option);
static int dccp_insert_option_ndp(struct sock *sk, struct sk_buff *skb)
{
struct dccp_sock *dp = dccp_sk(sk);
- int ndp = dp->dccps_ndp_count;
+ u64 ndp = dp->dccps_ndp_count;
if (dccp_non_data_packet(skb))
++dp->dccps_ndp_count;