[DCCP] options: Make dccp_insert_options & friends yell on error
And not the silly LIMIT_NETDEBUG and silently return without inserting
the option requested.
Also drop some old debugging messages associated to option insertion.
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dccp/options.c b/net/dccp/options.c
index 0161a18..da16760 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -283,17 +283,14 @@
return likely(ndp <= 0xFF) ? 1 : ndp <= 0xFFFF ? 2 : 3;
}
-void dccp_insert_option(struct sock *sk, struct sk_buff *skb,
+int dccp_insert_option(struct sock *sk, struct sk_buff *skb,
const unsigned char option,
const void *value, const unsigned char len)
{
unsigned char *to;
- if (DCCP_SKB_CB(skb)->dccpd_opt_len + len + 2 > DCCP_MAX_OPT_LEN) {
- LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to insert "
- "%d option!\n", option);
- return;
- }
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len + len + 2 > DCCP_MAX_OPT_LEN)
+ return -1;
DCCP_SKB_CB(skb)->dccpd_opt_len += len + 2;
@@ -302,11 +299,12 @@
*to++ = len + 2;
memcpy(to, value, len);
+ return 0;
}
EXPORT_SYMBOL_GPL(dccp_insert_option);
-static void dccp_insert_option_ndp(struct sock *sk, struct sk_buff *skb)
+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;
@@ -322,7 +320,7 @@
const int len = ndp_len + 2;
if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN)
- return;
+ return -1;
DCCP_SKB_CB(skb)->dccpd_opt_len += len;
@@ -331,6 +329,8 @@
*ptr++ = len;
dccp_encode_value_var(ndp, ptr, ndp_len);
}
+
+ return 0;
}
static inline int dccp_elapsed_time_len(const u32 elapsed_time)
@@ -338,27 +338,18 @@
return elapsed_time == 0 ? 0 : elapsed_time <= 0xFFFF ? 2 : 4;
}
-void dccp_insert_option_elapsed_time(struct sock *sk,
- struct sk_buff *skb,
- u32 elapsed_time)
+int dccp_insert_option_elapsed_time(struct sock *sk, struct sk_buff *skb,
+ u32 elapsed_time)
{
-#ifdef CONFIG_IP_DCCP_DEBUG
- struct dccp_sock *dp = dccp_sk(sk);
- const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
- "CLIENT TX opt: " : "server TX opt: ";
-#endif
const int elapsed_time_len = dccp_elapsed_time_len(elapsed_time);
const int len = 2 + elapsed_time_len;
unsigned char *to;
if (elapsed_time_len == 0)
- return;
+ return 0;
- if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN) {
- LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to "
- "insert elapsed time!\n");
- return;
- }
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN)
+ return -1;
DCCP_SKB_CB(skb)->dccpd_opt_len += len;
@@ -374,10 +365,7 @@
memcpy(to, &var32, 4);
}
- dccp_pr_debug("%sELAPSED_TIME=%u, len=%d, seqno=%llu\n",
- debug_prefix, elapsed_time,
- len,
- (unsigned long long) DCCP_SKB_CB(skb)->dccpd_seq);
+ return 0;
}
EXPORT_SYMBOL_GPL(dccp_insert_option_elapsed_time);
@@ -398,7 +386,7 @@
EXPORT_SYMBOL_GPL(dccp_timestamp);
-void dccp_insert_option_timestamp(struct sock *sk, struct sk_buff *skb)
+int dccp_insert_option_timestamp(struct sock *sk, struct sk_buff *skb)
{
struct timeval tv;
__be32 now;
@@ -408,19 +396,15 @@
/* yes this will overflow but that is the point as we want a
* 10 usec 32 bit timer which mean it wraps every 11.9 hours */
- dccp_insert_option(sk, skb, DCCPO_TIMESTAMP, &now, sizeof(now));
+ return dccp_insert_option(sk, skb, DCCPO_TIMESTAMP, &now, sizeof(now));
}
EXPORT_SYMBOL_GPL(dccp_insert_option_timestamp);
-static void dccp_insert_option_timestamp_echo(struct sock *sk,
- struct sk_buff *skb)
+static int dccp_insert_option_timestamp_echo(struct sock *sk,
+ struct sk_buff *skb)
{
struct dccp_sock *dp = dccp_sk(sk);
-#ifdef CONFIG_IP_DCCP_DEBUG
- const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
- "CLIENT TX opt: " : "server TX opt: ";
-#endif
struct timeval now;
__be32 tstamp_echo;
u32 elapsed_time;
@@ -432,11 +416,8 @@
elapsed_time_len = dccp_elapsed_time_len(elapsed_time);
len = 6 + elapsed_time_len;
- if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN) {
- LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to insert "
- "timestamp echo!\n");
- return;
- }
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN)
+ return -1;
DCCP_SKB_CB(skb)->dccpd_opt_len += len;
@@ -456,14 +437,10 @@
memcpy(to, &var32, 4);
}
- dccp_pr_debug("%sTIMESTAMP_ECHO=%u, len=%d, seqno=%llu\n",
- debug_prefix, dp->dccps_timestamp_echo,
- len,
- (unsigned long long) DCCP_SKB_CB(skb)->dccpd_seq);
-
dp->dccps_timestamp_echo = 0;
dp->dccps_timestamp_time.tv_sec = 0;
dp->dccps_timestamp_time.tv_usec = 0;
+ return 0;
}
static int dccp_insert_feat_opt(struct sk_buff *skb, u8 type, u8 feat,
@@ -491,7 +468,7 @@
return 0;
}
-static void dccp_insert_feat(struct sock *sk, struct sk_buff *skb)
+static int dccp_insert_options_feat(struct sock *sk, struct sk_buff *skb)
{
struct dccp_sock *dp = dccp_sk(sk);
struct dccp_opt_pend *opt, *next;
@@ -551,44 +528,48 @@
inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
inet_csk(sk)->icsk_rto, DCCP_RTO_MAX);
}
+
+ return 0;
}
-void dccp_insert_options(struct sock *sk, struct sk_buff *skb)
+int dccp_insert_options(struct sock *sk, struct sk_buff *skb)
{
struct dccp_sock *dp = dccp_sk(sk);
DCCP_SKB_CB(skb)->dccpd_opt_len = 0;
- if (dp->dccps_options.dccpo_send_ndp_count)
- dccp_insert_option_ndp(sk, skb);
+ if (dp->dccps_options.dccpo_send_ndp_count &&
+ dccp_insert_option_ndp(sk, skb))
+ return -1;
if (!dccp_packet_without_ack(skb)) {
if (dp->dccps_options.dccpo_send_ack_vector &&
- dccp_ackvec_pending(dp->dccps_hc_rx_ackvec))
- dccp_insert_option_ackvec(sk, skb);
- if (dp->dccps_timestamp_echo != 0)
- dccp_insert_option_timestamp_echo(sk, skb);
+ dccp_ackvec_pending(dp->dccps_hc_rx_ackvec) &&
+ dccp_insert_option_ackvec(sk, skb))
+ return -1;
+
+ if (dp->dccps_timestamp_echo != 0 &&
+ dccp_insert_option_timestamp_echo(sk, skb))
+ return -1;
}
if (dp->dccps_hc_rx_insert_options) {
- ccid_hc_rx_insert_options(dp->dccps_hc_rx_ccid, sk, skb);
+ if (ccid_hc_rx_insert_options(dp->dccps_hc_rx_ccid, sk, skb))
+ return -1;
dp->dccps_hc_rx_insert_options = 0;
}
if (dp->dccps_hc_tx_insert_options) {
- ccid_hc_tx_insert_options(dp->dccps_hc_tx_ccid, sk, skb);
+ if (ccid_hc_tx_insert_options(dp->dccps_hc_tx_ccid, sk, skb))
+ return -1;
dp->dccps_hc_tx_insert_options = 0;
}
/* Feature negotiation */
- switch(DCCP_SKB_CB(skb)->dccpd_type) {
- /* Data packets can't do feat negotiation */
- case DCCP_PKT_DATA:
- case DCCP_PKT_DATAACK:
- break;
- default:
- dccp_insert_feat(sk, skb);
- break;
- }
+ /* Data packets can't do feat negotiation */
+ if (DCCP_SKB_CB(skb)->dccpd_type != DCCP_PKT_DATA &&
+ DCCP_SKB_CB(skb)->dccpd_type != DCCP_PKT_DATAACK &&
+ dccp_insert_options_feat(sk, skb))
+ return -1;
/* XXX: insert other options when appropriate */
@@ -602,4 +583,6 @@
DCCP_SKB_CB(skb)->dccpd_opt_len += padding;
}
}
+
+ return 0;
}