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/* $OpenBSD: tuba_usrreq.c,v 1.5 2003/12/10 07:22:44 itojun Exp $ */
/* $NetBSD: tuba_usrreq.c,v 1.8 1996/02/13 22:12:40 christos Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)tuba_usrreq.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/errno.h>
#include <sys/stat.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcpip.h>
#include <netinet/tcp_debug.h>
#include <netiso/argo_debug.h>
#include <netiso/iso.h>
#include <netiso/clnp.h>
#include <netiso/iso_pcb.h>
#include <netiso/iso_var.h>
#include <netiso/tuba_table.h>
/*
* TCP protocol interface to socket abstraction.
*/
extern char *tcpstates[];
extern struct inpcbtable tuba_inpcb;
extern struct isopcb tuba_isopcb;
/*
* Process a TCP user request for TCP tb. If this is a send request
* then m is the mbuf chain of send data. If this is a timer expiration
* (called from the software clock routine), then timertype tells which timer.
*/
/* ARGSUSED */
int
tuba_usrreq(so, req, m, nam, control)
struct socket *so;
int req;
struct mbuf *m, *nam, *control;
{
struct inpcb *inp;
struct isopcb *isop = NULL;
struct tcpcb *tp = NULL;
int s;
int error = 0;
int ostate;
struct sockaddr_iso *siso;
if (req == PRU_CONTROL)
return (iso_control(so, (long) m, (caddr_t) nam,
(struct ifnet *) control));
s = splsoftnet();
inp = sotoinpcb(so);
/*
* When a TCP is attached to a socket, then there will be
* a (struct inpcb) pointed at by the socket, and this
* structure will point at a subsidary (struct tcpcb).
*/
if (inp == 0 && req != PRU_ATTACH) {
splx(s);
return (EINVAL);/* XXX */
}
if (inp) {
tp = intotcpcb(inp);
if (tp == 0)
panic("tuba_usrreq");
ostate = tp->t_state;
isop = (struct isopcb *) tp->t_tuba_pcb;
if (isop == 0)
panic("tuba_usrreq 2");
} else
ostate = 0;
switch (req) {
/*
* TCP attaches to socket via PRU_ATTACH, reserving space,
* and an internet control block. We also need to
* allocate an isopcb and separate the control block from
* tcp/ip ones.
*/
case PRU_ATTACH:
if ((error = iso_pcballoc(so, &tuba_isopcb)) != 0)
break;
isop = (struct isopcb *) so->so_pcb;
so->so_pcb = 0;
if ((error = tcp_usrreq(so, req, m, nam, control)) != 0) {
isop->isop_socket = 0;
iso_pcbdetach(isop);
} else {
inp = sotoinpcb(so);
CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, inp,
inp_queue);
CIRCLEQ_INSERT_HEAD(&tuba_inpcb.inpt_queue, inp,
inp_queue);
inp->inp_table = &tuba_inpcb;
tp = intotcpcb(inp);
if (tp == 0)
panic("tuba_usrreq 3");
tp->t_tuba_pcb = (caddr_t) isop;
}
goto notrace;
/*
* PRU_DETACH detaches the TCP protocol from the socket.
* If the protocol state is non-embryonic, then can't
* do this directly: have to initiate a PRU_DISCONNECT,
* which may finish later; embryonic TCB's can just
* be discarded here.
*/
case PRU_DETACH:
if (tp->t_state > TCPS_LISTEN)
tp = tcp_disconnect(tp);
else
tp = tcp_close(tp);
if (tp == 0)
tuba_pcbdetach(isop);
break;
/*
* Give the socket an address.
*/
case PRU_BIND:
siso = mtod(nam, struct sockaddr_iso *);
if (siso->siso_tlen && siso->siso_tlen != 2) {
error = EINVAL;
break;
}
if ((error = iso_pcbbind(isop, nam)) ||
(siso = isop->isop_laddr) == 0)
break;
bcopy(TSEL(siso), &inp->inp_lport, 2);
if (siso->siso_nlen &&
!(inp->inp_laddr.s_addr = tuba_lookup(siso, M_WAITOK)))
error = ENOBUFS;
break;
/*
* Prepare to accept connections.
*/
case PRU_CONNECT:
case PRU_LISTEN:
if (inp->inp_lport == 0 &&
(error = iso_pcbbind(isop, NULL)))
break;
bcopy(TSEL(isop->isop_laddr), &inp->inp_lport, 2);
if (req == PRU_LISTEN) {
tp->t_state = TCPS_LISTEN;
break;
}
/* FALLTHROUGH */
/*
* Initiate connection to peer.
* Create a template for use in transmissions on this connection.
* Enter SYN_SENT state, and mark socket as connecting.
* Start keep-alive timer, and seed output sequence space.
* Send initial segment on connection.
*/
/* case PRU_CONNECT: */
if ((error = iso_pcbconnect(isop, nam)) != 0)
break;
if ((siso = isop->isop_laddr) && siso->siso_nlen > 1)
siso->siso_data[siso->siso_nlen - 1] = ISOPROTO_TCP;
else
panic("tuba_usrreq: connect");
siso = mtod(nam, struct sockaddr_iso *);
if (!(inp->inp_faddr.s_addr = tuba_lookup(siso, M_WAITOK))) {
unconnect:
iso_pcbdisconnect(isop);
error = ENOBUFS;
break;
}
bcopy(TSEL(isop->isop_faddr), &inp->inp_fport, 2);
if (inp->inp_laddr.s_addr == 0 &&
(inp->inp_laddr.s_addr =
tuba_lookup(isop->isop_laddr, M_WAITOK)) == 0)
goto unconnect;
if ((tp->t_template = tcp_template(tp)) == 0)
goto unconnect;
soisconnecting(so);
tcpstat.tcps_connattempt++;
tp->t_state = TCPS_SYN_SENT;
tp->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT;
tp->iss = tcp_iss;
tcp_iss += TCP_ISSINCR / 2;
tcp_sendseqinit(tp);
error = tcp_output(tp);
tuba_refcnt(isop, 1);
break;
/*
* Initiate disconnect from peer.
* If connection never passed embryonic stage, just drop;
* else if don't need to let data drain, then can just drop anyways,
* else have to begin TCP shutdown process: mark socket disconnecting,
* drain unread data, state switch to reflect user close, and
* send segment (e.g. FIN) to peer. Socket will be really disconnected
* when peer sends FIN and acks ours.
*
* SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB.
*/
case PRU_DISCONNECT:
if ((tp = tcp_disconnect(tp)) == 0)
tuba_pcbdetach(isop);
break;
/*
* Accept a connection. Essentially all the work is
* done at higher levels; just return the address
* of the peer, storing through addr.
*/
case PRU_ACCEPT:
bcopy((caddr_t) isop->isop_faddr, mtod(nam, caddr_t),
nam->m_len = isop->isop_faddr->siso_len);
break;
/*
* Mark the connection as being incapable of further output.
*/
case PRU_SHUTDOWN:
if (so->so_state & SS_CANTSENDMORE)
break;
socantsendmore(so);
tp = tcp_usrclosed(tp);
if (tp)
error = tcp_output(tp);
else
tuba_pcbdetach(isop);
break;
/*
* Abort the TCP.
*/
case PRU_ABORT:
if ((tp = tcp_drop(tp, ECONNABORTED)) == 0)
tuba_pcbdetach(isop);
break;
case PRU_SOCKADDR:
if (isop->isop_laddr)
bcopy((caddr_t) isop->isop_laddr, mtod(nam, caddr_t),
nam->m_len = isop->isop_laddr->siso_len);
break;
case PRU_PEERADDR:
if (isop->isop_faddr)
bcopy((caddr_t) isop->isop_faddr, mtod(nam, caddr_t),
nam->m_len = isop->isop_faddr->siso_len);
break;
default:
error = tcp_usrreq(so, req, m, nam, control);
goto notrace;
}
if (tp && (so->so_options & SO_DEBUG))
tcp_trace(TA_USER, ostate, tp, (struct tcpiphdr *) 0, req);
notrace:
splx(s);
return (error);
}
int
tuba_ctloutput(op, so, level, optname, mp)
int op;
struct socket *so;
int level, optname;
struct mbuf **mp;
{
if (level != IPPROTO_TCP)
return rclnp_ctloutput(op, so, level, optname, mp);
else
return tcp_ctloutput(op, so, level, optname, mp);
}
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