2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 Chelsio Communications, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
33 #include "opt_inet6.h"
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/eventhandler.h>
39 #include <sys/socket.h>
40 #include <sys/socketvar.h>
41 #include <sys/sockopt.h>
43 #include <net/if_var.h>
44 #include <net/route.h>
45 #include <net/route/nhop.h>
46 #include <netinet/in.h>
47 #include <netinet/in_pcb.h>
48 #include <netinet/in_fib.h>
49 #include <netinet6/in6_fib.h>
50 #include <netinet/tcp.h>
51 #include <netinet/tcp_offload.h>
53 #include <netinet/tcp_fsm.h>
54 #include <netinet/tcp_var.h>
55 #include <netinet/toecore.h>
57 int registered_toedevs;
60 * Provide an opportunity for a TOE driver to offload.
63 tcp_offload_connect(struct socket *so, struct sockaddr *nam)
67 struct nhop_object *nh;
68 struct epoch_tracker et;
69 int error = EOPNOTSUPP;
71 INP_WLOCK_ASSERT(sotoinpcb(so));
72 KASSERT(nam->sa_family == AF_INET || nam->sa_family == AF_INET6,
73 ("%s: called with sa_family %d", __func__, nam->sa_family));
75 if (registered_toedevs == 0)
81 if (nam->sa_family == AF_INET)
82 nh = fib4_lookup(0, ((struct sockaddr_in *)nam)->sin_addr,
85 #if defined(INET) && defined(INET6)
89 if (nam->sa_family == AF_INET6)
90 nh = fib6_lookup(0, &((struct sockaddr_in6 *)nam)->sin6_addr,
95 return (EHOSTUNREACH);
100 if (nam->sa_family == AF_INET && !(ifp->if_capenable & IFCAP_TOE4))
102 if (nam->sa_family == AF_INET6 && !(ifp->if_capenable & IFCAP_TOE6))
107 error = tod->tod_connect(tod, so, nh, nam);
114 tcp_offload_listen_start(struct tcpcb *tp)
117 INP_WLOCK_ASSERT(tp->t_inpcb);
119 EVENTHANDLER_INVOKE(tcp_offload_listen_start, tp);
123 tcp_offload_listen_stop(struct tcpcb *tp)
126 INP_WLOCK_ASSERT(tp->t_inpcb);
128 EVENTHANDLER_INVOKE(tcp_offload_listen_stop, tp);
132 tcp_offload_input(struct tcpcb *tp, struct mbuf *m)
134 struct toedev *tod = tp->tod;
136 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
137 INP_WLOCK_ASSERT(tp->t_inpcb);
139 tod->tod_input(tod, tp, m);
143 tcp_offload_output(struct tcpcb *tp)
145 struct toedev *tod = tp->tod;
148 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
149 INP_WLOCK_ASSERT(tp->t_inpcb);
151 flags = tcp_outflags[tp->t_state];
153 if (flags & TH_RST) {
154 /* XXX: avoid repeated calls like we do for FIN */
155 error = tod->tod_send_rst(tod, tp);
156 } else if ((flags & TH_FIN || tp->t_flags & TF_NEEDFIN) &&
157 (tp->t_flags & TF_SENTFIN) == 0) {
158 error = tod->tod_send_fin(tod, tp);
160 tp->t_flags |= TF_SENTFIN;
162 error = tod->tod_output(tod, tp);
168 tcp_offload_rcvd(struct tcpcb *tp)
170 struct toedev *tod = tp->tod;
172 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
173 INP_WLOCK_ASSERT(tp->t_inpcb);
175 tod->tod_rcvd(tod, tp);
179 tcp_offload_ctloutput(struct tcpcb *tp, int sopt_dir, int sopt_name)
181 struct toedev *tod = tp->tod;
183 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
184 INP_WLOCK_ASSERT(tp->t_inpcb);
186 tod->tod_ctloutput(tod, tp, sopt_dir, sopt_name);
190 tcp_offload_tcp_info(struct tcpcb *tp, struct tcp_info *ti)
192 struct toedev *tod = tp->tod;
194 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
195 INP_WLOCK_ASSERT(tp->t_inpcb);
197 tod->tod_tcp_info(tod, tp, ti);
201 tcp_offload_alloc_tls_session(struct tcpcb *tp, struct ktls_session *tls)
203 struct toedev *tod = tp->tod;
205 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
206 INP_WLOCK_ASSERT(tp->t_inpcb);
208 return (tod->tod_alloc_tls_session(tod, tp, tls));
212 tcp_offload_detach(struct tcpcb *tp)
214 struct toedev *tod = tp->tod;
216 KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp));
217 INP_WLOCK_ASSERT(tp->t_inpcb);
219 tod->tod_pcb_detach(tod, tp);