*/
#include <linux/dccp.h>
+#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/timer.h>
.tw_timer = TIMER_INITIALIZER(inet_twdr_hangman, 0,
(unsigned long)&dccp_death_row),
.twkill_work = __WORK_INITIALIZER(dccp_death_row.twkill_work,
- inet_twdr_twkill_work,
- &dccp_death_row),
+ inet_twdr_twkill_work),
/* Short-time timewait calendar */
.twcal_hand = -1,
* socket up. We've got bigger problems than
* non-graceful socket closings.
*/
- LIMIT_NETDEBUG(KERN_INFO "DCCP: time wait bucket "
- "table overflow\n");
+ DCCP_WARN("time wait bucket table overflow\n");
}
dccp_done(sk);
/*
* Step 3: Process LISTEN state
*
- * // Generate a new socket and switch to that socket
- * Set S := new socket for this port pair
+ * (* Generate a new socket and switch to that socket *)
+ * Set S := new socket for this port pair
*/
struct sock *newsk = inet_csk_clone(sk, req, GFP_ATOMIC);
/*
* Step 3: Process LISTEN state
*
- * Choose S.ISS (initial seqno) or set from Init Cookie
- * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init
- * Cookie
+ * Choose S.ISS (initial seqno) or set from Init Cookies
+ * Initialize S.GAR := S.ISS
+ * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookies
*/
/* See dccp_v4_conn_request */
EXPORT_SYMBOL_GPL(dccp_create_openreq_child);
-/*
+/*
* Process an incoming packet for RESPOND sockets represented
* as an request_sock.
*/
/* Check for retransmitted REQUEST */
if (dccp_hdr(skb)->dccph_type == DCCP_PKT_REQUEST) {
- if (after48(DCCP_SKB_CB(skb)->dccpd_seq,
- dccp_rsk(req)->dreq_isr)) {
- struct dccp_request_sock *dreq = dccp_rsk(req);
+ struct dccp_request_sock *dreq = dccp_rsk(req);
+ if (after48(DCCP_SKB_CB(skb)->dccpd_seq, dreq->dreq_isr)) {
dccp_pr_debug("Retransmitted REQUEST\n");
- /* Send another RESPONSE packet */
- dccp_set_seqno(&dreq->dreq_iss, dreq->dreq_iss + 1);
- dccp_set_seqno(&dreq->dreq_isr,
- DCCP_SKB_CB(skb)->dccpd_seq);
+ dreq->dreq_isr = DCCP_SKB_CB(skb)->dccpd_seq;
+ /*
+ * Send another RESPONSE packet
+ * To protect against Request floods, increment retrans
+ * counter (backoff, monitored by dccp_response_timer).
+ */
+ req->retrans++;
req->rsk_ops->rtx_syn_ack(sk, req, NULL);
}
/* Network Duplicate, discard packet */
DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY;
drop:
if (dccp_hdr(skb)->dccph_type != DCCP_PKT_RESET)
- req->rsk_ops->send_reset(skb);
+ req->rsk_ops->send_reset(sk, skb);
inet_csk_reqsk_queue_drop(sk, req, prev);
goto out;
}
EXPORT_SYMBOL_GPL(dccp_child_process);
+
+void dccp_reqsk_send_ack(struct sk_buff *skb, struct request_sock *rsk)
+{
+ DCCP_BUG("DCCP-ACK packets are never sent in LISTEN/RESPOND state");
+}
+
+EXPORT_SYMBOL_GPL(dccp_reqsk_send_ack);
+
+void dccp_reqsk_init(struct request_sock *req, struct sk_buff *skb)
+{
+ inet_rsk(req)->rmt_port = dccp_hdr(skb)->dccph_sport;
+ inet_rsk(req)->acked = 0;
+ req->rcv_wnd = sysctl_dccp_feat_sequence_window;
+}
+
+EXPORT_SYMBOL_GPL(dccp_reqsk_init);