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Diffstat (limited to 'net/dccp/feat.c')
-rw-r--r--net/dccp/feat.c29
1 files changed, 14 insertions, 15 deletions
diff --git a/net/dccp/feat.c b/net/dccp/feat.c
index 5ebdd86c1b9..4a4f6ce4498 100644
--- a/net/dccp/feat.c
+++ b/net/dccp/feat.c
@@ -4,10 +4,16 @@
* An implementation of the DCCP protocol
* Andrea Bittau <a.bittau@cs.ucl.ac.uk>
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
+ * ASSUMPTIONS
+ * -----------
+ * o All currently known SP features have 1-byte quantities. If in the future
+ * extensions of RFCs 4340..42 define features with item lengths larger than
+ * one byte, a feature-specific extension of the code will be required.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
*/
#include <linux/module.h>
@@ -24,11 +30,7 @@ int dccp_feat_change(struct dccp_minisock *dmsk, u8 type, u8 feature,
dccp_feat_debug(type, feature, *val);
- if (!dccp_feat_is_valid_type(type)) {
- DCCP_WARN("option type %d invalid in negotiation\n", type);
- return 1;
- }
- if (!dccp_feat_is_valid_length(type, feature, len)) {
+ if (len > 3) {
DCCP_WARN("invalid length %d\n", len);
return 1;
}
@@ -99,7 +101,6 @@ static int dccp_feat_update_ccid(struct sock *sk, u8 type, u8 new_ccid_nr)
return 0;
}
-/* XXX taking only u8 vals */
static int dccp_feat_update(struct sock *sk, u8 type, u8 feat, u8 val)
{
dccp_feat_debug(type, feat, val);
@@ -144,7 +145,6 @@ static int dccp_feat_reconcile(struct sock *sk, struct dccp_opt_pend *opt,
/* FIXME sanity check vals */
/* Are values in any order? XXX Lame "algorithm" here */
- /* XXX assume values are 1 byte */
for (i = 0; i < slen; i++) {
for (j = 0; j < rlen; j++) {
if (spref[i] == rpref[j]) {
@@ -179,7 +179,6 @@ static int dccp_feat_reconcile(struct sock *sk, struct dccp_opt_pend *opt,
}
/* need to put result and our preference list */
- /* XXX assume 1 byte vals */
rlen = 1 + opt->dccpop_len;
rpref = kmalloc(rlen, GFP_ATOMIC);
if (rpref == NULL)
@@ -637,12 +636,12 @@ const char *dccp_feat_name(const u8 feat)
[DCCPF_MIN_CSUM_COVER] = "Min. Csum Coverage",
[DCCPF_DATA_CHECKSUM] = "Send Data Checksum",
};
+ if (feat > DCCPF_DATA_CHECKSUM && feat < DCCPF_MIN_CCID_SPECIFIC)
+ return feature_names[DCCPF_RESERVED];
+
if (feat >= DCCPF_MIN_CCID_SPECIFIC)
return "CCID-specific";
- if (dccp_feat_is_reserved(feat))
- return feature_names[DCCPF_RESERVED];
-
return feature_names[feat];
}