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/*-
* Copyright (c) 2012 Chelsio Communications, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sockopt.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/tcp.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_offload.h>
#define TCPOUTFLAGS
#include <netinet/tcp_fsm.h>
#include <netinet/toecore.h>
int registered_toedevs;
/*
* Provide an opportunity for a TOE driver to offload.
*/
int
tcp_offload_connect(struct socket *so, struct sockaddr *nam)
{
struct ifnet *ifp;
struct toedev *tod;
struct rtentry *rt;
int error = EOPNOTSUPP;
INP_WLOCK_ASSERT(sotoinpcb(so));
KASSERT(nam->sa_family == AF_INET || nam->sa_family == AF_INET6,
("%s: called with sa_family %d", __func__, nam->sa_family));
if (registered_toedevs == 0)
return (error);
rt = rtalloc1(nam, 0, 0);
if (rt)
RT_UNLOCK(rt);
else
return (EHOSTUNREACH);
ifp = rt->rt_ifp;
if (nam->sa_family == AF_INET && !(ifp->if_capenable & IFCAP_TOE4))
goto done;
if (nam->sa_family == AF_INET6 && !(ifp->if_capenable & IFCAP_TOE6))
goto done;
tod = TOEDEV(ifp);
if (tod != NULL)
error = tod->tod_connect(tod, so, rt, nam);
done:
RTFREE(rt);
return (error);
}
void
tcp_offload_listen_start(struct tcpcb *tp)
{
INP_WLOCK_ASSERT(tp->t_inpcb);
EVENTHANDLER_INVOKE(tcp_offload_listen_start, tp);
}
void
tcp_offload_listen_stop(struct tcpcb *tp)
{
INP_WLOCK_ASSERT(tp->t_inpcb);
EVENTHANDLER_INVOKE(tcp_offload_listen_stop, tp);
}
void
tcp_offload_input(struct tcpcb *tp, struct mbuf *m)
{
struct toedev *tod = tp->tod;
KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
INP_WLOCK_ASSERT(tp->t_inpcb);
tod->tod_input(tod, tp, m);
}
int
tcp_offload_output(struct tcpcb *tp)
{
struct toedev *tod = tp->tod;
int error, flags;
KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
INP_WLOCK_ASSERT(tp->t_inpcb);
flags = tcp_outflags[tp->t_state];
if (flags & TH_RST) {
/* XXX: avoid repeated calls like we do for FIN */
error = tod->tod_send_rst(tod, tp);
} else if ((flags & TH_FIN || tp->t_flags & TF_NEEDFIN) &&
(tp->t_flags & TF_SENTFIN) == 0) {
error = tod->tod_send_fin(tod, tp);
if (error == 0)
tp->t_flags |= TF_SENTFIN;
} else
error = tod->tod_output(tod, tp);
return (error);
}
void
tcp_offload_rcvd(struct tcpcb *tp)
{
struct toedev *tod = tp->tod;
KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
INP_WLOCK_ASSERT(tp->t_inpcb);
tod->tod_rcvd(tod, tp);
}
void
tcp_offload_ctloutput(struct tcpcb *tp, int sopt_dir, int sopt_name)
{
struct toedev *tod = tp->tod;
KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
INP_WLOCK_ASSERT(tp->t_inpcb);
tod->tod_ctloutput(tod, tp, sopt_dir, sopt_name);
}
void
tcp_offload_detach(struct tcpcb *tp)
{
struct toedev *tod = tp->tod;
KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
INP_WLOCK_ASSERT(tp->t_inpcb);
tod->tod_pcb_detach(tod, tp);
}
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