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[DCCP] options: Make dccp_insert_options & friends yell on error

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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>
This commit is contained in:
Arnaldo Carvalho de Melo
2006-03-20 22:32:06 -08:00
committed by David S. Miller
parent 110bae4efb
commit 2d0817d11e
6 changed files with 102 additions and 102 deletions
Download Patch File Download Diff File Expand all files Collapse all files

109
net/dccp/options.c
View File

@ -283,17 +283,14 @@ static inline int dccp_ndp_len(const int ndp)
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 @@ void dccp_insert_option(struct sock *sk, struct sk_buff *skb,
*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 @@ static void dccp_insert_option_ndp(struct sock *sk, struct sk_buff *skb)
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 @@ static void dccp_insert_option_ndp(struct sock *sk, struct sk_buff *skb)
*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 @@ static inline int dccp_elapsed_time_len(const u32 elapsed_time)
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 @@ void dccp_insert_option_elapsed_time(struct sock *sk,
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 @@ void dccp_timestamp(const struct sock *sk, struct timeval *tv)
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 @@ void dccp_insert_option_timestamp(struct sock *sk, struct sk_buff *skb)
/* 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 @@ static void dccp_insert_option_timestamp_echo(struct sock *sk,
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 @@ static void dccp_insert_option_timestamp_echo(struct sock *sk,
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 @@ static int dccp_insert_feat_opt(struct sk_buff *skb, u8 type, u8 feat,
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 @@ static void dccp_insert_feat(struct sock *sk, struct sk_buff *skb)
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 @@ void dccp_insert_options(struct sock *sk, struct sk_buff *skb)
DCCP_SKB_CB(skb)->dccpd_opt_len += padding;
}
}
return 0;
}