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dccp: Increase the scope of variable-length htonl/ntohl functions

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This extends the scope of two available functions, encode|decode_value_var,
to work up to 6 (8) bytes, to match maximum requirements in the RFC.

These functions are going to be used both by general option processing and 
feature negotiation code, hence declarations have been put into feat.h.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Gerrit Renker
2008-09-04 07:30:19 +02:00
parent c8041e264b
commit b9aaac1c53
2 changed files with 28 additions and 7 deletions
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21
net/dccp/options.c
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@@ -29,16 +29,20 @@ int sysctl_dccp_feat_tx_ccid = DCCPF_INITIAL_CCID;
int sysctl_dccp_feat_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR;
int sysctl_dccp_feat_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT;
static u32 dccp_decode_value_var(const unsigned char *bf, const u8 len)
u64 dccp_decode_value_var(const u8 *bf, const u8 len)
{
u32 value = 0;
u64 value = 0;
if (len >= DCCP_OPTVAL_MAXLEN)
value += ((u64)*bf++) << 40;
if (len > 4)
value += ((u64)*bf++) << 32;
if (len > 3)
value += *bf++ << 24;
value += ((u64)*bf++) << 24;
if (len > 2)
value += *bf++ << 16;
value += ((u64)*bf++) << 16;
if (len > 1)
value += *bf++ << 8;
value += ((u64)*bf++) << 8;
if (len > 0)
value += *bf;
@@ -298,9 +302,12 @@ out_invalid_option:
EXPORT_SYMBOL_GPL(dccp_parse_options);
static void dccp_encode_value_var(const u32 value, unsigned char *to,
const unsigned int len)
void dccp_encode_value_var(const u64 value, u8 *to, const u8 len)
{
if (len >= DCCP_OPTVAL_MAXLEN)
*to++ = (value & 0xFF0000000000ull) >> 40;
if (len > 4)
*to++ = (value & 0xFF00000000ull) >> 32;
if (len > 3)
*to++ = (value & 0xFF000000) >> 24;
if (len > 2)