int dccp_feat_default_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR;
int dccp_feat_default_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT;
-void dccp_options_init(struct dccp_options *dccpo)
+void dccp_minisock_init(struct dccp_minisock *dmsk)
{
- dccpo->dccpo_sequence_window = dccp_feat_default_sequence_window;
- dccpo->dccpo_rx_ccid = dccp_feat_default_rx_ccid;
- dccpo->dccpo_tx_ccid = dccp_feat_default_tx_ccid;
- dccpo->dccpo_ack_ratio = dccp_feat_default_ack_ratio;
- dccpo->dccpo_send_ack_vector = dccp_feat_default_send_ack_vector;
- dccpo->dccpo_send_ndp_count = dccp_feat_default_send_ndp_count;
+ dmsk->dccpms_sequence_window = dccp_feat_default_sequence_window;
+ dmsk->dccpms_rx_ccid = dccp_feat_default_rx_ccid;
+ dmsk->dccpms_tx_ccid = dccp_feat_default_tx_ccid;
+ dmsk->dccpms_ack_ratio = dccp_feat_default_ack_ratio;
+ dmsk->dccpms_send_ack_vector = dccp_feat_default_send_ack_vector;
+ dmsk->dccpms_send_ndp_count = dccp_feat_default_send_ndp_count;
}
static u32 dccp_decode_value_var(const unsigned char *bf, const u8 len)
memset(opt_recv, 0, sizeof(*opt_recv));
+ opt = len = 0;
while (opt_ptr != opt_end) {
opt = *opt_ptr++;
len = 0;
case DCCPO_MANDATORY:
if (mandatory)
goto out_invalid_option;
- mandatory = 1;
+ if (pkt_type != DCCP_PKT_DATA)
+ mandatory = 1;
break;
case DCCPO_NDP_COUNT:
if (len > 3)
case DCCPO_ACK_VECTOR_0:
case DCCPO_ACK_VECTOR_1:
if (pkt_type == DCCP_PKT_DATA)
- continue;
+ break;
- if (dp->dccps_options.dccpo_send_ack_vector &&
+ if (dccp_msk(sk)->dccpms_send_ack_vector &&
dccp_ackvec_parse(sk, skb, opt, value, len))
goto out_invalid_option;
break;
mandatory = 0;
}
+ /* mandatory was the last byte in option list -> reset connection */
+ if (mandatory)
+ goto out_invalid_option;
+
return 0;
out_invalid_option:
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;
*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;
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;
*ptr++ = len;
dccp_encode_value_var(ndp, ptr, ndp_len);
}
+
+ return 0;
}
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;
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);
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;
/* 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;
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;
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,
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_minisock *dmsk = dccp_msk(sk);
struct dccp_opt_pend *opt, *next;
int change = 0;
/* confirm any options [NN opts] */
- list_for_each_entry_safe(opt, next, &dp->dccps_options.dccpo_conf,
- dccpop_node) {
+ list_for_each_entry_safe(opt, next, &dmsk->dccpms_conf, dccpop_node) {
dccp_insert_feat_opt(skb, opt->dccpop_type,
opt->dccpop_feat, opt->dccpop_val,
opt->dccpop_len);
kfree(opt->dccpop_val);
kfree(opt);
}
- INIT_LIST_HEAD(&dp->dccps_options.dccpo_conf);
+ INIT_LIST_HEAD(&dmsk->dccpms_conf);
/* see which features we need to send */
- list_for_each_entry(opt, &dp->dccps_options.dccpo_pending,
- dccpop_node) {
+ list_for_each_entry(opt, &dmsk->dccpms_pending, dccpop_node) {
/* see if we need to send any confirm */
if (opt->dccpop_sc) {
dccp_insert_feat_opt(skb, opt->dccpop_type + 1,
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);
+ struct dccp_minisock *dmsk = dccp_msk(sk);
DCCP_SKB_CB(skb)->dccpd_opt_len = 0;
- if (dp->dccps_options.dccpo_send_ndp_count)
- dccp_insert_option_ndp(sk, skb);
+ if (dmsk->dccpms_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);
+ if (dmsk->dccpms_send_ack_vector &&
+ 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 */
DCCP_SKB_CB(skb)->dccpd_opt_len += padding;
}
}
+
+ return 0;
}
projects / linux-2.6 / blobdiff