* 2 of the License, or (at your option) any later version.
*/
-#include <linux/config.h>
#include <linux/dccp.h>
+#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/timer.h>
#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
+#include "feat.h"
struct inet_timewait_death_row dccp_death_row = {
.sysctl_max_tw_buckets = NR_FILE * 2,
(unsigned long)&dccp_death_row),
};
+EXPORT_SYMBOL_GPL(dccp_death_row);
+
void dccp_time_wait(struct sock *sk, int state, int timeo)
{
struct inet_timewait_sock *tw = NULL;
if (tw != NULL) {
const struct inet_connection_sock *icsk = inet_csk(sk);
const int rto = (icsk->icsk_rto << 2) - (icsk->icsk_rto >> 1);
-
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ if (tw->tw_family == PF_INET6) {
+ const struct ipv6_pinfo *np = inet6_sk(sk);
+ struct inet6_timewait_sock *tw6;
+
+ tw->tw_ipv6_offset = inet6_tw_offset(sk->sk_prot);
+ tw6 = inet6_twsk((struct sock *)tw);
+ ipv6_addr_copy(&tw6->tw_v6_daddr, &np->daddr);
+ ipv6_addr_copy(&tw6->tw_v6_rcv_saddr, &np->rcv_saddr);
+ tw->tw_ipv6only = np->ipv6only;
+ }
+#endif
/* Linkage updates. */
__inet_twsk_hashdance(tw, sk, &dccp_hashinfo);
/*
* 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);
const struct dccp_request_sock *dreq = dccp_rsk(req);
struct inet_connection_sock *newicsk = inet_csk(sk);
struct dccp_sock *newdp = dccp_sk(newsk);
+ struct dccp_minisock *newdmsk = dccp_msk(newsk);
newdp->dccps_role = DCCP_ROLE_SERVER;
newdp->dccps_hc_rx_ackvec = NULL;
newicsk->icsk_rto = DCCP_TIMEOUT_INIT;
do_gettimeofday(&newdp->dccps_epoch);
- if (newdp->dccps_options.dccpo_send_ack_vector) {
+ if (dccp_feat_clone(sk, newsk))
+ goto out_free;
+
+ if (newdmsk->dccpms_send_ack_vector) {
newdp->dccps_hc_rx_ackvec =
- dccp_ackvec_alloc(DCCP_MAX_ACKVEC_LEN,
- GFP_ATOMIC);
- /*
- * XXX: We're using the same CCIDs set on the parent,
- * i.e. sk_clone copied the master sock and left the
- * CCID pointers for this child, that is why we do the
- * __ccid_get calls.
- */
+ dccp_ackvec_alloc(GFP_ATOMIC);
if (unlikely(newdp->dccps_hc_rx_ackvec == NULL))
goto out_free;
}
- if (unlikely(ccid_hc_rx_init(newdp->dccps_hc_rx_ccid,
- newsk) != 0 ||
- ccid_hc_tx_init(newdp->dccps_hc_tx_ccid,
- newsk) != 0)) {
+ newdp->dccps_hc_rx_ccid =
+ ccid_hc_rx_new(newdmsk->dccpms_rx_ccid,
+ newsk, GFP_ATOMIC);
+ newdp->dccps_hc_tx_ccid =
+ ccid_hc_tx_new(newdmsk->dccpms_tx_ccid,
+ newsk, GFP_ATOMIC);
+ if (unlikely(newdp->dccps_hc_rx_ccid == NULL ||
+ newdp->dccps_hc_tx_ccid == NULL)) {
dccp_ackvec_free(newdp->dccps_hc_rx_ackvec);
- ccid_hc_rx_exit(newdp->dccps_hc_rx_ccid, newsk);
- ccid_hc_tx_exit(newdp->dccps_hc_tx_ccid, newsk);
+ ccid_hc_rx_delete(newdp->dccps_hc_rx_ccid, newsk);
+ ccid_hc_tx_delete(newdp->dccps_hc_tx_ccid, newsk);
out_free:
/* It is still raw copy of parent, so invalidate
* destructor and make plain sk_free() */
return NULL;
}
- __ccid_get(newdp->dccps_hc_rx_ccid);
- __ccid_get(newdp->dccps_hc_tx_ccid);
-
/*
* 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 */
- newdp->dccps_options.dccpo_sequence_window = req->rcv_wnd;
+ newdmsk->dccpms_sequence_window = req->rcv_wnd;
newdp->dccps_gar = newdp->dccps_isr = dreq->dreq_isr;
dccp_update_gsr(newsk, dreq->dreq_isr);
return newsk;
}
+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 */
goto drop;
}
- child = dccp_v4_request_recv_sock(sk, skb, req, NULL);
+ child = inet_csk(sk)->icsk_af_ops->syn_recv_sock(sk, skb, req, NULL);
if (child == NULL)
goto listen_overflow;
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_check_req);
+
/*
* Queue segment on the new socket if the new socket is active,
* otherwise we just shortcircuit this and continue with
sock_put(child);
return ret;
}
+
+EXPORT_SYMBOL_GPL(dccp_child_process);
+
+void dccp_reqsk_send_ack(struct sk_buff *skb, struct request_sock *rsk)
+{
+ pr_info(KERN_WARNING "DCCP: ACK packets are never sent in "
+ "LISTEN/RESPOND state\n");
+ dump_stack();
+}
+
+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);
projects / linux-drm-fsl-dcu.git / blobdiff