/* This is _not_ the normal way to "unoffload" a socket. */
void
undo_offload_socket(struct socket *so)
{
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp = intotcpcb(inp);
struct toepcb *toep = tp->t_toe;
struct tom_data *td = toep->td;
struct sockbuf *sb;
INP_WLOCK_ASSERT(inp);
sb = &so->so_snd;
SOCKBUF_LOCK(sb);
sb->sb_flags &= ~SB_NOCOALESCE;
SOCKBUF_UNLOCK(sb);
sb = &so->so_rcv;
SOCKBUF_LOCK(sb);
sb->sb_flags &= ~SB_NOCOALESCE;
SOCKBUF_UNLOCK(sb);
tp->tod = NULL;
tp->t_toe = NULL;
tp->t_flags &= ~TF_TOE;
toep->inp = NULL;
toep->flags &= ~TPF_ATTACHED;
if (in_pcbrele_wlocked(inp))
panic("%s: inp freed.", __func__);
mtx_lock(&td->toep_list_lock);
TAILQ_REMOVE(&td->toep_list, toep, link);
mtx_unlock(&td->toep_list_lock);
}
/*
* Two update paths: one in which the 4-tuple on an inpcb has been updated
* and therefore connection groups may need to change (or a wildcard entry
* may needed to be installed), and another in which the 4-tuple has been
* set as a result of a packet received, in which case we may be able to use
* the hash on the mbuf to avoid doing a software hash calculation for RSS.
*
* In each case: first, let the wildcard code have a go at placing it as a
* wildcard socket. If it was a wildcard, or if the connection has been
* dropped, then no pcbgroup is required (so potentially clear it);
* otherwise, calculate and update the pcbgroup for the inpcb.
*/
void
in_pcbgroup_update(struct inpcb *inp)
{
struct inpcbinfo *pcbinfo;
struct inpcbgroup *newpcbgroup;
INP_WLOCK_ASSERT(inp);
pcbinfo = inp->inp_pcbinfo;
if (!in_pcbgroup_enabled(pcbinfo))
return;
in_pcbwild_update_internal(inp);
if (!(inp->inp_flags2 & INP_PCBGROUPWILD) &&
!(inp->inp_flags & INP_DROPPED)) {
#ifdef INET6
if (inp->inp_vflag & INP_IPV6)
newpcbgroup = in6_pcbgroup_byinpcb(inp);
else
#endif
newpcbgroup = in_pcbgroup_byinpcb(inp);
} else
newpcbgroup = NULL;
in_pcbgroup_update_internal(pcbinfo, newpcbgroup, inp);
}
void
handle_ddp_close(struct toepcb *toep, struct tcpcb *tp, struct sockbuf *sb,
__be32 rcv_nxt)
{
struct mbuf *m;
int len;
SOCKBUF_LOCK_ASSERT(sb);
INP_WLOCK_ASSERT(toep->inp);
len = be32toh(rcv_nxt) - tp->rcv_nxt;
/* Signal handle_ddp() to break out of its sleep loop. */
toep->ddp_flags &= ~(DDP_BUF0_ACTIVE | DDP_BUF1_ACTIVE);
if (len == 0)
return;
tp->rcv_nxt += len;
KASSERT(toep->sb_cc >= sbused(sb),
("%s: sb %p has more data (%d) than last time (%d).",
__func__, sb, sbused(sb), toep->sb_cc));
toep->rx_credits += toep->sb_cc - sbused(sb);
#ifdef USE_DDP_RX_FLOW_CONTROL
toep->rx_credits -= len; /* adjust for F_RX_FC_DDP */
#endif
m = get_ddp_mbuf(len);
sbappendstream_locked(sb, m, 0);
toep->sb_cc = sbused(sb);
}
void
t4_rcvd(struct toedev *tod, struct tcpcb *tp)
{
struct adapter *sc = tod->tod_softc;
struct inpcb *inp = tp->t_inpcb;
struct socket *so = inp->inp_socket;
struct sockbuf *sb = &so->so_rcv;
struct toepcb *toep = tp->t_toe;
int credits;
INP_WLOCK_ASSERT(inp);
SOCKBUF_LOCK(sb);
KASSERT(toep->sb_cc >= sb->sb_cc,
("%s: sb %p has more data (%d) than last time (%d).",
__func__, sb, sb->sb_cc, toep->sb_cc));
toep->rx_credits += toep->sb_cc - sb->sb_cc;
toep->sb_cc = sb->sb_cc;
credits = toep->rx_credits;
SOCKBUF_UNLOCK(sb);
if (credits > 0 &&
(credits + 16384 >= tp->rcv_wnd || credits >= 15 * 1024)) {
credits = send_rx_credits(sc, toep, credits);
SOCKBUF_LOCK(sb);
toep->rx_credits -= credits;
SOCKBUF_UNLOCK(sb);
tp->rcv_wnd += credits;
tp->rcv_adv += credits;
}
}
/*
* 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);
}
/*
* Set up the socket for TCP offload.
*/
void
offload_socket(struct socket *so, struct toepcb *toep)
{
struct tom_data *td = toep->td;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp = intotcpcb(inp);
struct sockbuf *sb;
INP_WLOCK_ASSERT(inp);
/* Update socket */
sb = &so->so_snd;
SOCKBUF_LOCK(sb);
sb->sb_flags |= SB_NOCOALESCE;
SOCKBUF_UNLOCK(sb);
sb = &so->so_rcv;
SOCKBUF_LOCK(sb);
sb->sb_flags |= SB_NOCOALESCE;
SOCKBUF_UNLOCK(sb);
/* Update TCP PCB */
tp->tod = &td->tod;
tp->t_toe = toep;
tp->t_flags |= TF_TOE;
/* Install an extra hold on inp */
toep->inp = inp;
toepcb_set_flag(toep, TPF_ATTACHED);
in_pcbref(inp);
/* Add the TOE PCB to the active list */
mtx_lock(&td->toep_list_lock);
TAILQ_INSERT_HEAD(&td->toep_list, toep, link);
mtx_unlock(&td->toep_list_lock);
}
/*
* Called after the last CPL for the toepcb has been received.
*
* The inp must be wlocked on entry and is unlocked (or maybe destroyed) by the
* time this function exits.
*/
static int
toepcb_release(struct toepcb *toep)
{
struct inpcb *inp = toep->tp_inp;
struct toedev *tod = toep->tp_tod;
struct tom_data *td = t3_tomdata(tod);
int rc;
INP_WLOCK_ASSERT(inp);
KASSERT(!(toep->tp_flags & TP_CPL_DONE),
("%s: double release?", __func__));
CTR2(KTR_CXGB, "%s: tid %d", __func__, toep->tp_tid);
toep->tp_flags |= TP_CPL_DONE;
toep->tp_inp = NULL;
mtx_lock(&td->toep_list_lock);
TAILQ_REMOVE(&td->toep_list, toep, link);
mtx_unlock(&td->toep_list_lock);
if (!(toep->tp_flags & TP_ATTACHED))
t3_release_offload_resources(toep);
rc = in_pcbrele_wlocked(inp);
if (!rc)
INP_WUNLOCK(inp);
return (rc);
}
void
t4_rcvd_locked(struct toedev *tod, struct tcpcb *tp)
{
struct adapter *sc = tod->tod_softc;
struct inpcb *inp = tp->t_inpcb;
struct socket *so = inp->inp_socket;
struct sockbuf *sb = &so->so_rcv;
struct toepcb *toep = tp->t_toe;
int credits;
INP_WLOCK_ASSERT(inp);
SOCKBUF_LOCK_ASSERT(sb);
KASSERT(toep->sb_cc >= sbused(sb),
("%s: sb %p has more data (%d) than last time (%d).",
__func__, sb, sbused(sb), toep->sb_cc));
toep->rx_credits += toep->sb_cc - sbused(sb);
toep->sb_cc = sbused(sb);
if (toep->rx_credits > 0 &&
(tp->rcv_wnd <= 32 * 1024 || toep->rx_credits >= 64 * 1024 ||
(toep->rx_credits >= 16 * 1024 && tp->rcv_wnd <= 128 * 1024) ||
toep->sb_cc + tp->rcv_wnd < sb->sb_lowat)) {
credits = send_rx_credits(sc, toep, toep->rx_credits);
toep->rx_credits -= credits;
tp->rcv_wnd += credits;
tp->rcv_adv += credits;
}
}
/*
* Initiate (or continue) disconnect.
* If embryonic state, just send reset (once).
* If in ``let data drain'' option and linger null, just drop.
* Otherwise (hard), mark socket disconnecting and drop
* current input data; switch states based on user close, and
* send segment to peer (with FIN).
*/
static void
tcp_disconnect(struct tcpcb *tp)
{
struct inpcb *inp = tp->t_inpcb;
struct socket *so = inp->inp_socket;
INP_INFO_WLOCK_ASSERT(&V_tcbinfo);
INP_WLOCK_ASSERT(inp);
/*
* Neither tcp_close() nor tcp_drop() should return NULL, as the
* socket is still open.
*/
if (tp->t_state < TCPS_ESTABLISHED) {
tp = tcp_close(tp);
KASSERT(tp != NULL,
("tcp_disconnect: tcp_close() returned NULL"));
} else if ((so->so_options & SO_LINGER) && so->so_linger == 0) {
tp = tcp_drop(tp, 0);
KASSERT(tp != NULL,
("tcp_disconnect: tcp_drop() returned NULL"));
} else {
soisdisconnecting(so);
sbflush(&so->so_rcv);
tcp_usrclosed(tp);
if (!(inp->inp_flags & INP_DROPPED))
tcp_output_disconnect(tp);
}
}
/* XXX: handle_ddp_data code duplication */
void
insert_ddp_data(struct toepcb *toep, uint32_t n)
{
struct inpcb *inp = toep->inp;
struct tcpcb *tp = intotcpcb(inp);
struct sockbuf *sb = &inp->inp_socket->so_rcv;
struct mbuf *m;
INP_WLOCK_ASSERT(inp);
SOCKBUF_LOCK_ASSERT(sb);
m = get_ddp_mbuf(n);
tp->rcv_nxt += n;
#ifndef USE_DDP_RX_FLOW_CONTROL
KASSERT(tp->rcv_wnd >= n, ("%s: negative window size", __func__));
tp->rcv_wnd -= n;
#endif
KASSERT(toep->sb_cc >= sbused(sb),
("%s: sb %p has more data (%d) than last time (%d).",
__func__, sb, sbused(sb), toep->sb_cc));
toep->rx_credits += toep->sb_cc - sbused(sb);
#ifdef USE_DDP_RX_FLOW_CONTROL
toep->rx_credits -= n; /* adjust for F_RX_FC_DDP */
#endif
sbappendstream_locked(sb, m, 0);
toep->sb_cc = sbused(sb);
}
/*
* One sided detach. The tcpcb is going away and we need to unhook the toepcb
* hanging off it. If the TOE driver is also done with the toepcb we'll release
* all offload resources.
*/
static void
toepcb_detach(struct inpcb *inp)
{
struct toepcb *toep;
struct tcpcb *tp;
KASSERT(inp, ("%s: inp is NULL", __func__));
INP_WLOCK_ASSERT(inp);
tp = intotcpcb(inp);
toep = tp->t_toe;
KASSERT(toep != NULL, ("%s: toep is NULL", __func__));
KASSERT(toep->tp_flags & TP_ATTACHED, ("%s: not attached", __func__));
CTR6(KTR_CXGB, "%s: %s %u, toep %p, inp %p, tp %p", __func__,
tp->t_state == TCPS_SYN_SENT ? "atid" : "tid", toep->tp_tid,
toep, inp, tp);
tp->t_toe = NULL;
tp->t_flags &= ~TF_TOE;
toep->tp_flags &= ~TP_ATTACHED;
if (toep->tp_flags & TP_CPL_DONE)
t3_release_offload_resources(toep);
}
void
tcp_offload_listen_start(struct tcpcb *tp)
{
INP_WLOCK_ASSERT(tp->t_inpcb);
EVENTHANDLER_INVOKE(tcp_offload_listen_start, tp);
}
static void
rip_delhash(struct inpcb *inp)
{
INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
INP_WLOCK_ASSERT(inp);
LIST_REMOVE(inp, inp_hash);
}
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);
}
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);
}
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_tcp_info(struct tcpcb *tp, struct tcp_info *ti)
{
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_tcp_info(tod, tp, ti);
}
void
send_reset(struct adapter *sc, struct toepcb *toep, uint32_t snd_nxt)
{
struct wrqe *wr;
struct cpl_abort_req *req;
int tid = toep->tid;
struct inpcb *inp = toep->inp;
struct tcpcb *tp = intotcpcb(inp); /* don't use if INP_DROPPED */
INP_WLOCK_ASSERT(inp);
CTR6(KTR_CXGBE, "%s: tid %d (%s), toep_flags 0x%x, inp_flags 0x%x%s",
__func__, toep->tid,
inp->inp_flags & INP_DROPPED ? "inp dropped" :
tcpstates[tp->t_state],
toep->flags, inp->inp_flags,
toep->flags & TPF_ABORT_SHUTDOWN ?
" (abort already in progress)" : "");
if (toep->flags & TPF_ABORT_SHUTDOWN)
return; /* abort already in progress */
toep->flags |= TPF_ABORT_SHUTDOWN;
KASSERT(toep->flags & TPF_FLOWC_WR_SENT,
("%s: flowc_wr not sent for tid %d.", __func__, tid));
wr = alloc_wrqe(sizeof(*req), toep->ofld_txq);
if (wr == NULL) {
/* XXX */
panic("%s: allocation failure.", __func__);
}
req = wrtod(wr);
INIT_TP_WR_MIT_CPL(req, CPL_ABORT_REQ, tid);
if (inp->inp_flags & INP_DROPPED)
req->rsvd0 = htobe32(snd_nxt);
else
req->rsvd0 = htobe32(tp->snd_nxt);
req->rsvd1 = !(toep->flags & TPF_TX_DATA_SENT);
req->cmd = CPL_ABORT_SEND_RST;
/*
* XXX: What's the correct way to tell that the inp hasn't been detached
* from its socket? Should I even be flushing the snd buffer here?
*/
if ((inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) == 0) {
struct socket *so = inp->inp_socket;
if (so != NULL) /* because I'm not sure. See comment above */
sbflush(&so->so_snd);
}
t4_l2t_send(sc, wr, toep->l2te);
}
/*
* tcp_detach is called when the socket layer loses its final reference
* to the socket, be it a file descriptor reference, a reference from TCP,
* etc. At this point, there is only one case in which we will keep around
* inpcb state: time wait.
*
* This function can probably be re-absorbed back into tcp_usr_detach() now
* that there is a single detach path.
*/
static void
tcp_detach(struct socket *so, struct inpcb *inp)
{
struct tcpcb *tp;
INP_INFO_WLOCK_ASSERT(&V_tcbinfo);
INP_WLOCK_ASSERT(inp);
KASSERT(so->so_pcb == inp, ("tcp_detach: so_pcb != inp"));
KASSERT(inp->inp_socket == so, ("tcp_detach: inp_socket != so"));
tp = intotcpcb(inp);
if (inp->inp_flags & INP_TIMEWAIT) {
/*
* There are two cases to handle: one in which the time wait
* state is being discarded (INP_DROPPED), and one in which
* this connection will remain in timewait. In the former,
* it is time to discard all state (except tcptw, which has
* already been discarded by the timewait close code, which
* should be further up the call stack somewhere). In the
* latter case, we detach from the socket, but leave the pcb
* present until timewait ends.
*
* XXXRW: Would it be cleaner to free the tcptw here?
*/
if (inp->inp_flags & INP_DROPPED) {
KASSERT(tp == NULL, ("tcp_detach: INP_TIMEWAIT && "
"INP_DROPPED && tp != NULL"));
in_pcbdetach(inp);
in_pcbfree(inp);
} else {
in_pcbdetach(inp);
INP_WUNLOCK(inp);
}
} else {
/*
* If the connection is not in timewait, we consider two
* two conditions: one in which no further processing is
* necessary (dropped || embryonic), and one in which TCP is
* not yet done, but no longer requires the socket, so the
* pcb will persist for the time being.
*
* XXXRW: Does the second case still occur?
*/
if (inp->inp_flags & INP_DROPPED ||
tp->t_state < TCPS_SYN_SENT) {
tcp_discardcb(tp);
in_pcbdetach(inp);
in_pcbfree(inp);
} else
in_pcbdetach(inp);
}
}
/*
* Common subroutine to open a TCP connection to remote host specified
* by struct sockaddr_in in mbuf *nam. Call in_pcbbind to assign a local
* port number if needed. Call in_pcbconnect_setup to do the routing and
* to choose a local host address (interface). If there is an existing
* incarnation of the same connection in TIME-WAIT state and if the remote
* host was sending CC options and if the connection duration was < MSL, then
* truncate the previous TIME-WAIT state and proceed.
* Initialize connection parameters and enter SYN-SENT state.
*/
static int
tcp_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td)
{
struct inpcb *inp = tp->t_inpcb, *oinp;
struct socket *so = inp->inp_socket;
struct in_addr laddr;
u_short lport;
int error;
INP_INFO_WLOCK_ASSERT(&V_tcbinfo);
INP_WLOCK_ASSERT(inp);
if (inp->inp_lport == 0) {
error = in_pcbbind(inp, (struct sockaddr *)0, td->td_ucred);
if (error)
return error;
}
/*
* Cannot simply call in_pcbconnect, because there might be an
* earlier incarnation of this same connection still in
* TIME_WAIT state, creating an ADDRINUSE error.
*/
laddr = inp->inp_laddr;
lport = inp->inp_lport;
error = in_pcbconnect_setup(inp, nam, &laddr.s_addr, &lport,
&inp->inp_faddr.s_addr, &inp->inp_fport, &oinp, td->td_ucred);
if (error && oinp == NULL)
return error;
if (oinp)
return EADDRINUSE;
inp->inp_laddr = laddr;
in_pcbrehash(inp);
/*
* Compute window scaling to request:
* Scale to fit into sweet spot. See tcp_syncache.c.
* XXX: This should move to tcp_output().
*/
while (tp->request_r_scale < TCP_MAX_WINSHIFT &&
(TCP_MAXWIN << tp->request_r_scale) < sb_max)
tp->request_r_scale++;
soisconnecting(so);
TCPSTAT_INC(tcps_connattempt);
tp->t_state = TCPS_SYN_SENT;
tcp_timer_activate(tp, TT_KEEP, tcp_keepinit);
tp->iss = tcp_new_isn(tp);
tp->t_bw_rtseq = tp->iss;
tcp_sendseqinit(tp);
return 0;
}
/*
* Update the pcbgroup of an inpcb, which might include removing an old
* pcbgroup reference and/or adding a new one. Wildcard processing is not
* performed here, although ideally we'll never install a pcbgroup for a
* wildcard inpcb (asserted below).
*/
static void
in_pcbgroup_update_internal(struct inpcbinfo *pcbinfo,
struct inpcbgroup *newpcbgroup, struct inpcb *inp)
{
struct inpcbgroup *oldpcbgroup;
struct inpcbhead *pcbhash;
uint32_t hashkey_faddr;
INP_WLOCK_ASSERT(inp);
oldpcbgroup = inp->inp_pcbgroup;
if (oldpcbgroup != NULL && oldpcbgroup != newpcbgroup) {
INP_GROUP_LOCK(oldpcbgroup);
LIST_REMOVE(inp, inp_pcbgrouphash);
inp->inp_pcbgroup = NULL;
INP_GROUP_UNLOCK(oldpcbgroup);
}
if (newpcbgroup != NULL && oldpcbgroup != newpcbgroup) {
#ifdef INET6
if (inp->inp_vflag & INP_IPV6)
hashkey_faddr = INP6_PCBHASHKEY(&inp->in6p_faddr);
else
#endif
hashkey_faddr = inp->inp_faddr.s_addr;
INP_GROUP_LOCK(newpcbgroup);
/*
* If the inp is an RSS bucket wildcard entry, ensure
* that the PCB hash is calculated correctly.
*
* The wildcard hash calculation differs from the
* non-wildcard definition. The source address is
* INADDR_ANY and the far port is 0.
*/
if (inp->inp_flags2 & INP_RSS_BUCKET_SET) {
pcbhash = &newpcbgroup->ipg_hashbase[
INP_PCBHASH(INADDR_ANY, inp->inp_lport, 0,
newpcbgroup->ipg_hashmask)];
} else {
pcbhash = &newpcbgroup->ipg_hashbase[
INP_PCBHASH(hashkey_faddr, inp->inp_lport,
inp->inp_fport,
newpcbgroup->ipg_hashmask)];
}
LIST_INSERT_HEAD(pcbhash, inp, inp_pcbgrouphash);
inp->inp_pcbgroup = newpcbgroup;
INP_GROUP_UNLOCK(newpcbgroup);
}
KASSERT(!(newpcbgroup != NULL && in_pcbwild_needed(inp)),
("%s: pcbgroup and wildcard!", __func__));
}
/*
* User issued close, and wish to trail through shutdown states:
* if never received SYN, just forget it. If got a SYN from peer,
* but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN.
* If already got a FIN from peer, then almost done; go to LAST_ACK
* state. In all other cases, have already sent FIN to peer (e.g.
* after PRU_SHUTDOWN), and just have to play tedious game waiting
* for peer to send FIN or not respond to keep-alives, etc.
* We can let the user exit from the close as soon as the FIN is acked.
*/
static void
tcp_usrclosed(struct tcpcb *tp)
{
INP_INFO_WLOCK_ASSERT(&V_tcbinfo);
INP_WLOCK_ASSERT(tp->t_inpcb);
switch (tp->t_state) {
case TCPS_LISTEN:
tcp_offload_listen_close(tp);
/* FALLTHROUGH */
case TCPS_CLOSED:
tp->t_state = TCPS_CLOSED;
tp = tcp_close(tp);
/*
* tcp_close() should never return NULL here as the socket is
* still open.
*/
KASSERT(tp != NULL,
("tcp_usrclosed: tcp_close() returned NULL"));
break;
case TCPS_SYN_SENT:
case TCPS_SYN_RECEIVED:
tp->t_flags |= TF_NEEDFIN;
break;
case TCPS_ESTABLISHED:
tp->t_state = TCPS_FIN_WAIT_1;
break;
case TCPS_CLOSE_WAIT:
tp->t_state = TCPS_LAST_ACK;
break;
}
if (tp->t_state >= TCPS_FIN_WAIT_2) {
soisdisconnected(tp->t_inpcb->inp_socket);
/* Prevent the connection hanging in FIN_WAIT_2 forever. */
if (tp->t_state == TCPS_FIN_WAIT_2) {
int timeout;
timeout = (tcp_fast_finwait2_recycle) ?
tcp_finwait2_timeout : tcp_maxidle;
tcp_timer_activate(tp, TT_2MSL, timeout);
}
}
}
void
tcp_reass_flush(struct tcpcb *tp)
{
struct mbuf *m;
INP_WLOCK_ASSERT(tp->t_inpcb);
while ((m = tp->t_segq) != NULL) {
tp->t_segq = m->m_nextpkt;
tp->t_segqlen -= m->m_pkthdr.len;
m_freem(m);
}
KASSERT((tp->t_segqlen == 0),
("TCP reass queue %p length is %d instead of 0 after flush.",
tp, tp->t_segqlen));
}
int
t4_tod_output(struct toedev *tod, struct tcpcb *tp)
{
struct adapter *sc = tod->tod_softc;
#ifdef INVARIANTS
struct inpcb *inp = tp->t_inpcb;
#endif
struct toepcb *toep = tp->t_toe;
INP_WLOCK_ASSERT(inp);
KASSERT((inp->inp_flags & INP_DROPPED) == 0,
("%s: inp %p dropped.", __func__, inp));
KASSERT(toep != NULL, ("%s: toep is NULL", __func__));
t4_push_frames(sc, toep);
return (0);
}
static void
in_pcbwild_remove(struct inpcb *inp)
{
struct inpcbinfo *pcbinfo;
u_int pgn;
INP_WLOCK_ASSERT(inp);
KASSERT((inp->inp_flags2 & INP_PCBGROUPWILD),
("%s: not wild", __func__));
pcbinfo = inp->inp_pcbinfo;
for (pgn = 0; pgn < pcbinfo->ipi_npcbgroups; pgn++)
INP_GROUP_LOCK(&pcbinfo->ipi_pcbgroups[pgn]);
LIST_REMOVE(inp, inp_pcbgroup_wild);
for (pgn = 0; pgn < pcbinfo->ipi_npcbgroups; pgn++)
INP_GROUP_UNLOCK(&pcbinfo->ipi_pcbgroups[pgn]);
inp->inp_flags2 &= ~INP_PCBGROUPWILD;
}
int
t4_send_fin(struct toedev *tod, struct tcpcb *tp)
{
struct adapter *sc = tod->tod_softc;
#ifdef INVARIANTS
struct inpcb *inp = tp->t_inpcb;
#endif
struct toepcb *toep = tp->t_toe;
INP_WLOCK_ASSERT(inp);
KASSERT((inp->inp_flags & INP_DROPPED) == 0,
("%s: inp %p dropped.", __func__, inp));
KASSERT(toep != NULL, ("%s: toep is NULL", __func__));
toep->flags |= TPF_SEND_FIN;
if (tp->t_state >= TCPS_ESTABLISHED)
t4_push_frames(sc, toep, 0);
return (0);
}
static void
ipsec_invalidate_cache(struct inpcb *inp, u_int dir)
{
struct secpolicy *sp;
INP_WLOCK_ASSERT(inp);
if (dir == IPSEC_DIR_OUTBOUND) {
if (inp->inp_sp->flags & INP_INBOUND_POLICY)
return;
sp = inp->inp_sp->sp_in;
inp->inp_sp->sp_in = NULL;
} else {
if (inp->inp_sp->flags & INP_OUTBOUND_POLICY)
return;
sp = inp->inp_sp->sp_out;
inp->inp_sp->sp_out = NULL;
}
if (sp != NULL)
key_freesp(&sp); /* release extra reference */
}
static void
rip_inshash(struct inpcb *inp)
{
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
struct inpcbhead *pcbhash;
int hash;
INP_INFO_WLOCK_ASSERT(pcbinfo);
INP_WLOCK_ASSERT(inp);
if (inp->inp_ip_p != 0 &&
inp->inp_laddr.s_addr != INADDR_ANY &&
inp->inp_faddr.s_addr != INADDR_ANY) {
hash = INP_PCBHASH_RAW(inp->inp_ip_p, inp->inp_laddr.s_addr,
inp->inp_faddr.s_addr, pcbinfo->ipi_hashmask);
} else
hash = 0;
pcbhash = &pcbinfo->ipi_hashbase[hash];
LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
}
/*
* Handle UDP_ENCAP socket option. Always return with released INP_WLOCK.
*/
int
udp_ipsec_pcbctl(struct inpcb *inp, struct sockopt *sopt)
{
struct udpcb *up;
int error, optval;
INP_WLOCK_ASSERT(inp);
if (sopt->sopt_name != UDP_ENCAP) {
INP_WUNLOCK(inp);
return (ENOPROTOOPT);
}
up = intoudpcb(inp);
if (sopt->sopt_dir == SOPT_GET) {
if (up->u_flags & UF_ESPINUDP)
optval = UDP_ENCAP_ESPINUDP;
else
optval = 0;
INP_WUNLOCK(inp);
return (sooptcopyout(sopt, &optval, sizeof(optval)));
}
INP_WUNLOCK(inp);
error = sooptcopyin(sopt, &optval, sizeof(optval), sizeof(optval));
if (error != 0)
return (error);
INP_WLOCK(inp);
switch (optval) {
case 0:
up->u_flags &= ~UF_ESPINUDP;
break;
case UDP_ENCAP_ESPINUDP:
up->u_flags |= UF_ESPINUDP;
break;
default:
error = EINVAL;
}
INP_WUNLOCK(inp);
return (error);
}
static int
tcp_ipsec_pcbctl(struct inpcb *inp, struct sockopt *sopt)
{
struct tcpcb *tp;
int error, optval;
INP_WLOCK_ASSERT(inp);
if (sopt->sopt_name != TCP_MD5SIG) {
INP_WUNLOCK(inp);
return (ENOPROTOOPT);
}
tp = intotcpcb(inp);
if (sopt->sopt_dir == SOPT_GET) {
optval = (tp->t_flags & TF_SIGNATURE) ? 1 : 0;
INP_WUNLOCK(inp);
/* On success return with released INP_WLOCK */
return (sooptcopyout(sopt, &optval, sizeof(optval)));
}
INP_WUNLOCK(inp);
error = sooptcopyin(sopt, &optval, sizeof(optval), sizeof(optval));
if (error != 0)
return (error);
/* INP_WLOCK_RECHECK */
INP_WLOCK(inp);
if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) {
INP_WUNLOCK(inp);
return (ECONNRESET);
}
if (optval > 0)
tp->t_flags |= TF_SIGNATURE;
else
tp->t_flags &= ~TF_SIGNATURE;
/* On success return with acquired INP_WLOCK */
return (error);
}
