#include <linux/kernel.h>
#include <linux/skbuff.h>
+#include <net/inet_sock.h>
#include <net/sock.h>
#include "ackvec.h"
unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct dccp_sock *dp = dccp_sk(sk);
- /*
- * FIXME: we really should be using the af_specific thing to support
- * IPv6.
- * mss_now = pmtu - tp->af_specific->net_header_len -
- * sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext);
- */
- int mss_now = (pmtu - inet_csk(sk)->icsk_af_ops->net_header_len -
+ int mss_now = (pmtu - icsk->icsk_af_ops->net_header_len -
sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext));
/* Now subtract optional transport overhead */
- mss_now -= dp->dccps_ext_header_len;
+ mss_now -= icsk->icsk_ext_hdr_len;
/*
* FIXME: this should come from the CCID infrastructure, where, say,
mss_now -= ((5 + 6 + 10 + 6 + 6 + 6 + 3) / 4) * 4;
/* And store cached results */
- dp->dccps_pmtu_cookie = pmtu;
+ icsk->icsk_pmtu_cookie = pmtu;
dp->dccps_mss_cache = mss_now;
return mss_now;
}
+EXPORT_SYMBOL_GPL(dccp_sync_mss);
+
void dccp_write_space(struct sock *sk)
{
read_lock(&sk->sk_callback_lock);
return skb;
}
+EXPORT_SYMBOL_GPL(dccp_make_response);
+
struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
const enum dccp_reset_codes code)
*/
static inline void dccp_connect_init(struct sock *sk)
{
+ struct dccp_sock *dp = dccp_sk(sk);
struct dst_entry *dst = __sk_dst_get(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
dccp_sync_mss(sk, dst_mtu(dst));
- /*
- * FIXME: set dp->{dccps_swh,dccps_swl}, with
- * something like dccp_inc_seq
- */
+ dccp_update_gss(sk, dp->dccps_iss);
+ /*
+ * SWL and AWL are initially adjusted so that they are not less than
+ * the initial Sequence Numbers received and sent, respectively:
+ * SWL := max(GSR + 1 - floor(W/4), ISR),
+ * AWL := max(GSS - W' + 1, ISS).
+ * These adjustments MUST be applied only at the beginning of the
+ * connection.
+ */
+ dccp_set_seqno(&dp->dccps_awl, max48(dp->dccps_awl, dp->dccps_iss));
icsk->icsk_retransmits = 0;
}
return 0;
}
+EXPORT_SYMBOL_GPL(dccp_connect);
+
void dccp_send_ack(struct sock *sk)
{
/* If we have been reset, we may not send again. */