/* $OpenBSD: tcp_usrreq.c,v 1.91 2007/06/25 12:17:43 markus Exp $ */
/* $NetBSD: tcp_usrreq.c,v 1.20 1996/02/13 23:44:16 christos Exp $ */
/*
* Copyright (c) 1982, 1986, 1988, 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.
*
* @(#)COPYRIGHT 1.1 (NRL) 17 January 1995
*
* NRL grants permission for redistribution and use in source and binary
* forms, with or without modification, of the software and documentation
* created at NRL 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgements:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* This product includes software developed at the Information
* Technology Division, US Naval Research Laboratory.
* 4. Neither the name of the NRL nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL 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 NRL 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.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies, either expressed or implied, of the US Naval
* Research Laboratory (NRL).
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/domain.h>
#include <sys/kernel.h>
#include <dev/rndvar.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.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>
/*
* TCP protocol interface to socket abstraction.
*/
extern char *tcpstates[];
extern int tcptv_keep_init;
extern int tcp_rst_ppslim;
/* from in_pcb.c */
extern struct baddynamicports baddynamicports;
#ifndef TCP_SENDSPACE
#define TCP_SENDSPACE 1024*16
#endif
u_int tcp_sendspace = TCP_SENDSPACE;
#ifndef TCP_RECVSPACE
#define TCP_RECVSPACE 1024*16
#endif
u_int tcp_recvspace = TCP_RECVSPACE;
int *tcpctl_vars[TCPCTL_MAXID] = TCPCTL_VARS;
struct inpcbtable tcbtable;
int tcp_ident(void *, size_t *, void *, size_t, int);
#ifdef INET6
int
tcp6_usrreq(so, req, m, nam, control, p)
struct socket *so;
int req;
struct mbuf *m, *nam, *control;
struct proc *p;
{
return tcp_usrreq(so, req, m, nam, control);
}
#endif
/*
* 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
tcp_usrreq(so, req, m, nam, control)
struct socket *so;
int req;
struct mbuf *m, *nam, *control;
{
struct sockaddr_in *sin;
struct inpcb *inp;
struct tcpcb *tp = NULL;
int s;
int error = 0;
short ostate;
if (req == PRU_CONTROL) {
#ifdef INET6
if (sotopf(so) == PF_INET6)
return in6_control(so, (u_long)m, (caddr_t)nam,
(struct ifnet *)control, 0);
else
#endif /* INET6 */
return (in_control(so, (u_long)m, (caddr_t)nam,
(struct ifnet *)control));
}
if (control && control->m_len) {
m_freem(control);
if (m)
m_freem(m);
return (EINVAL);
}
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 subsidiary (struct tcpcb).
*/
if (inp == 0 && req != PRU_ATTACH) {
splx(s);
/*
* The following corrects an mbuf leak under rare
* circumstances
*/
if (m && (req == PRU_SEND || req == PRU_SENDOOB))
m_freem(m);
return (EINVAL); /* XXX */
}
if (inp) {
tp = intotcpcb(inp);
/* WHAT IF TP IS 0? */
#ifdef KPROF
tcp_acounts[tp->t_state][req]++;
#endif
ostate = tp->t_state;
} else
ostate = 0;
switch (req) {
/*
* TCP attaches to socket via PRU_ATTACH, reserving space,
* and an internet control block.
*/
case PRU_ATTACH:
if (inp) {
error = EISCONN;
break;
}
error = tcp_attach(so);
if (error)
break;
if ((so->so_options & SO_LINGER) && so->so_linger == 0)
so->so_linger = TCP_LINGERTIME;
tp = sototcpcb(so);
break;
/*
* 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:
tp = tcp_disconnect(tp);
break;
/*
* Give the socket an address.
*/
case PRU_BIND:
#ifdef INET6
if (inp->inp_flags & INP_IPV6)
error = in6_pcbbind(inp, nam);
else
#endif
error = in_pcbbind(inp, nam);
if (error)
break;
break;
/*
* Prepare to accept connections.
*/
case PRU_LISTEN:
if (inp->inp_lport == 0) {
#ifdef INET6
if (inp->inp_flags & INP_IPV6)
error = in6_pcbbind(inp, NULL);
else
#endif
error = in_pcbbind(inp, NULL);
}
/* If the in_pcbbind() above is called, the tp->pf
should still be whatever it was before. */
if (error == 0)
tp->t_state = TCPS_LISTEN;
break;
/*
* 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:
sin = mtod(nam, struct sockaddr_in *);
#ifdef INET6
if (sin->sin_family == AF_INET6) {
struct in6_addr *in6_addr = &mtod(nam,
struct sockaddr_in6 *)->sin6_addr;
if (IN6_IS_ADDR_UNSPECIFIED(in6_addr) ||
IN6_IS_ADDR_MULTICAST(in6_addr) ||
(IN6_IS_ADDR_V4MAPPED(in6_addr) &&
((in6_addr->s6_addr32[3] == INADDR_ANY) ||
IN_MULTICAST(in6_addr->s6_addr32[3]) ||
in_broadcast(sin->sin_addr, NULL)))) {
error = EINVAL;
break;
}
if (inp->inp_lport == 0) {
error = in6_pcbbind(inp, NULL);
if (error)
break;
}
error = in6_pcbconnect(inp, nam);
} else if (sin->sin_family == AF_INET)
#endif /* INET6 */
{
if ((sin->sin_addr.s_addr == INADDR_ANY) ||
IN_MULTICAST(sin->sin_addr.s_addr) ||
in_broadcast(sin->sin_addr, NULL)) {
error = EINVAL;
break;
}
if (inp->inp_lport == 0) {
error = in_pcbbind(inp, NULL);
if (error)
break;
}
error = in_pcbconnect(inp, nam);
}
if (error)
break;
tp->t_template = tcp_template(tp);
if (tp->t_template == 0) {
in_pcbdisconnect(inp);
error = ENOBUFS;
break;
}
so->so_state |= SS_CONNECTOUT;
/* Compute window scaling to request. */
tcp_rscale(tp, so->so_rcv.sb_hiwat);
soisconnecting(so);
tcpstat.tcps_connattempt++;
tp->t_state = TCPS_SYN_SENT;
TCP_TIMER_ARM(tp, TCPT_KEEP, tcptv_keep_init);
#ifdef TCP_COMPAT_42
tp->iss = tcp_iss;
tcp_iss += TCP_ISSINCR/2;
#else /* TCP_COMPAT_42 */
tcp_set_iss_tsm(tp);
#endif /* !TCP_COMPAT_42 */
tcp_sendseqinit(tp);
#if defined(TCP_SACK)
tp->snd_last = tp->snd_una;
#endif
#if defined(TCP_SACK) && defined(TCP_FACK)
tp->snd_fack = tp->snd_una;
tp->retran_data = 0;
tp->snd_awnd = 0;
#endif
error = tcp_output(tp);
break;
/*
* Create a TCP connection between two sockets.
*/
case PRU_CONNECT2:
error = EOPNOTSUPP;
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:
tp = tcp_disconnect(tp);
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:
#ifdef INET6
if (inp->inp_flags & INP_IPV6)
in6_setpeeraddr(inp, nam);
else
#endif
in_setpeeraddr(inp, nam);
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);
break;
/*
* After a receive, possibly send window update to peer.
*/
case PRU_RCVD:
/*
* soreceive() calls this function when a user receives
* ancillary data on a listening socket. We don't call
* tcp_output in such a case, since there is no header
* template for a listening socket and hence the kernel
* will panic.
*/
if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0)
(void) tcp_output(tp);
break;
/*
* Do a send by putting data in output queue and updating urgent
* marker if URG set. Possibly send more data.
*/
case PRU_SEND:
sbappendstream(&so->so_snd, m);
error = tcp_output(tp);
break;
/*
* Abort the TCP.
*/
case PRU_ABORT:
tp = tcp_drop(tp, ECONNABORTED);
break;
case PRU_SENSE:
((struct stat *) m)->st_blksize = so->so_snd.sb_hiwat;
splx(s);
return (0);
case PRU_RCVOOB:
if ((so->so_oobmark == 0 &&
(so->so_state & SS_RCVATMARK) == 0) ||
so->so_options & SO_OOBINLINE ||
tp->t_oobflags & TCPOOB_HADDATA) {
error = EINVAL;
break;
}
if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) {
error = EWOULDBLOCK;
break;
}
m->m_len = 1;
*mtod(m, caddr_t) = tp->t_iobc;
if (((long)nam & MSG_PEEK) == 0)
tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA);
break;
case PRU_SENDOOB:
if (sbspace(&so->so_snd) < -512) {
m_freem(m);
error = ENOBUFS;
break;
}
/*
* According to RFC961 (Assigned Protocols),
* the urgent pointer points to the last octet
* of urgent data. We continue, however,
* to consider it to indicate the first octet
* of data past the urgent section.
* Otherwise, snd_up should be one lower.
*/
sbappendstream(&so->so_snd, m);
tp->snd_up = tp->snd_una + so->so_snd.sb_cc;
tp->t_force = 1;
error = tcp_output(tp);
tp->t_force = 0;
break;
case PRU_SOCKADDR:
#ifdef INET6
if (inp->inp_flags & INP_IPV6)
in6_setsockaddr(inp, nam);
else
#endif
in_setsockaddr(inp, nam);
break;
case PRU_PEERADDR:
#ifdef INET6
if (inp->inp_flags & INP_IPV6)
in6_setpeeraddr(inp, nam);
else
#endif
in_setpeeraddr(inp, nam);
break;
default:
panic("tcp_usrreq");
}
if (tp && (so->so_options & SO_DEBUG))
tcp_trace(TA_USER, ostate, tp, (caddr_t)0, req, 0);
splx(s);
return (error);
}
int
tcp_ctloutput(op, so, level, optname, mp)
int op;
struct socket *so;
int level, optname;
struct mbuf **mp;
{
int error = 0, s;
struct inpcb *inp;
struct tcpcb *tp;
struct mbuf *m;
int i;
s = splsoftnet();
inp = sotoinpcb(so);
if (inp == NULL) {
splx(s);
if (op == PRCO_SETOPT && *mp)
(void) m_free(*mp);
return (ECONNRESET);
}
#ifdef INET6
tp = intotcpcb(inp);
#endif /* INET6 */
if (level != IPPROTO_TCP) {
switch (so->so_proto->pr_domain->dom_family) {
#ifdef INET6
case PF_INET6:
error = ip6_ctloutput(op, so, level, optname, mp);
break;
#endif /* INET6 */
case PF_INET:
error = ip_ctloutput(op, so, level, optname, mp);
break;
default:
error = EAFNOSUPPORT; /*?*/
break;
}
splx(s);
return (error);
}
#ifndef INET6
tp = intotcpcb(inp);
#endif /* !INET6 */
switch (op) {
case PRCO_SETOPT:
m = *mp;
switch (optname) {
case TCP_NODELAY:
if (m == NULL || m->m_len < sizeof (int))
error = EINVAL;
else if (*mtod(m, int *))
tp->t_flags |= TF_NODELAY;
else
tp->t_flags &= ~TF_NODELAY;
break;
case TCP_MAXSEG:
if (m == NULL || m->m_len < sizeof (int)) {
error = EINVAL;
break;
}
i = *mtod(m, int *);
if (i > 0 && i <= tp->t_maxseg)
tp->t_maxseg = i;
else
error = EINVAL;
break;
#ifdef TCP_SACK
case TCP_SACK_ENABLE:
if (m == NULL || m->m_len < sizeof (int)) {
error = EINVAL;
break;
}
if (TCPS_HAVEESTABLISHED(tp->t_state)) {
error = EPERM;
break;
}
if (tp->t_flags & TF_SIGNATURE) {
error = EPERM;
break;
}
if (*mtod(m, int *))
tp->sack_enable = 1;
else
tp->sack_enable = 0;
break;
#endif
#ifdef TCP_SIGNATURE
case TCP_MD5SIG:
if (m == NULL || m->m_len < sizeof (int)) {
error = EINVAL;
break;
}
if (TCPS_HAVEESTABLISHED(tp->t_state)) {
error = EPERM;
break;
}
if (*mtod(m, int *)) {
tp->t_flags |= TF_SIGNATURE;
#ifdef TCP_SACK
tp->sack_enable = 0;
#endif /* TCP_SACK */
} else
tp->t_flags &= ~TF_SIGNATURE;
break;
#endif /* TCP_SIGNATURE */
default:
error = ENOPROTOOPT;
break;
}
if (m)
(void) m_free(m);
break;
case PRCO_GETOPT:
*mp = m = m_get(M_WAIT, MT_SOOPTS);
m->m_len = sizeof(int);
switch (optname) {
case TCP_NODELAY:
*mtod(m, int *) = tp->t_flags & TF_NODELAY;
break;
case TCP_MAXSEG:
*mtod(m, int *) = tp->t_maxseg;
break;
#ifdef TCP_SACK
case TCP_SACK_ENABLE:
*mtod(m, int *) = tp->sack_enable;
break;
#endif
#ifdef TCP_SIGNATURE
case TCP_MD5SIG:
*mtod(m, int *) = tp->t_flags & TF_SIGNATURE;
break;
#endif
default:
error = ENOPROTOOPT;
break;
}
break;
}
splx(s);
return (error);
}
/*
* Attach TCP protocol to socket, allocating
* internet protocol control block, tcp control block,
* bufer space, and entering LISTEN state if to accept connections.
*/
int
tcp_attach(so)
struct socket *so;
{
struct tcpcb *tp;
struct inpcb *inp;
int error;
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
error = soreserve(so, tcp_sendspace, tcp_recvspace);
if (error)
return (error);
}
error = in_pcballoc(so, &tcbtable);
if (error)
return (error);
inp = sotoinpcb(so);
tp = tcp_newtcpcb(inp);
if (tp == NULL) {
int nofd = so->so_state & SS_NOFDREF; /* XXX */
so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */
in_pcbdetach(inp);
so->so_state |= nofd;
return (ENOBUFS);
}
tp->t_state = TCPS_CLOSED;
#ifdef INET6
/* we disallow IPv4 mapped address completely. */
if (inp->inp_flags & INP_IPV6)
tp->pf = PF_INET6;
else
tp->pf = PF_INET;
#else
tp->pf = PF_INET;
#endif
return (0);
}
/*
* 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).
*/
struct tcpcb *
tcp_disconnect(tp)
struct tcpcb *tp;
{
struct socket *so = tp->t_inpcb->inp_socket;
if (TCPS_HAVEESTABLISHED(tp->t_state) == 0)
tp = tcp_close(tp);
else if ((so->so_options & SO_LINGER) && so->so_linger == 0)
tp = tcp_drop(tp, 0);
else {
soisdisconnecting(so);
sbflush(&so->so_rcv);
tp = tcp_usrclosed(tp);
if (tp)
(void) tcp_output(tp);
}
return (tp);
}
/*
* 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.
*/
struct tcpcb *
tcp_usrclosed(tp)
struct tcpcb *tp;
{
switch (tp->t_state) {
case TCPS_CLOSED:
case TCPS_LISTEN:
case TCPS_SYN_SENT:
tp->t_state = TCPS_CLOSED;
tp = tcp_close(tp);
break;
case TCPS_SYN_RECEIVED:
case TCPS_ESTABLISHED:
tp->t_state = TCPS_FIN_WAIT_1;
break;
case TCPS_CLOSE_WAIT:
tp->t_state = TCPS_LAST_ACK;
break;
}
if (tp && tp->t_state >= TCPS_FIN_WAIT_2) {
soisdisconnected(tp->t_inpcb->inp_socket);
/*
* If we are in FIN_WAIT_2, we arrived here because the
* application did a shutdown of the send side. Like the
* case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after
* a full close, we start a timer to make sure sockets are
* not left in FIN_WAIT_2 forever.
*/
if (tp->t_state == TCPS_FIN_WAIT_2)
TCP_TIMER_ARM(tp, TCPT_2MSL, tcp_maxidle);
}
return (tp);
}
/*
* Look up a socket for ident or tcpdrop, ...
*/
int
tcp_ident(oldp, oldlenp, newp, newlen, dodrop)
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
int dodrop;
{
int error = 0, s;
struct tcp_ident_mapping tir;
struct inpcb *inp;
struct tcpcb *tp = NULL;
struct sockaddr_in *fin, *lin;
#ifdef INET6
struct sockaddr_in6 *fin6, *lin6;
struct in6_addr f6, l6;
#endif
if (dodrop) {
if (oldp != NULL || *oldlenp != 0)
return (EINVAL);
if (newp == NULL)
return (EPERM);
if (newlen < sizeof(tir))
return (ENOMEM);
if ((error = copyin(newp, &tir, sizeof (tir))) != 0 )
return (error);
} else {
if (oldp == NULL)
return (EINVAL);
if (*oldlenp < sizeof(tir))
return (ENOMEM);
if (newp != NULL || newlen != 0)
return (EINVAL);
if ((error = copyin(oldp, &tir, sizeof (tir))) != 0 )
return (error);
}
switch (tir.faddr.ss_family) {
#ifdef INET6
case AF_INET6:
fin6 = (struct sockaddr_in6 *)&tir.faddr;
error = in6_embedscope(&f6, fin6, NULL, NULL);
if (error)
return EINVAL; /*?*/
lin6 = (struct sockaddr_in6 *)&tir.laddr;
error = in6_embedscope(&l6, lin6, NULL, NULL);
if (error)
return EINVAL; /*?*/
break;
#endif
case AF_INET:
fin = (struct sockaddr_in *)&tir.faddr;
lin = (struct sockaddr_in *)&tir.laddr;
break;
default:
return (EINVAL);
}
s = splsoftnet();
switch (tir.faddr.ss_family) {
#ifdef INET6
case AF_INET6:
inp = in6_pcbhashlookup(&tcbtable, &f6,
fin6->sin6_port, &l6, lin6->sin6_port);
break;
#endif
case AF_INET:
inp = in_pcbhashlookup(&tcbtable, fin->sin_addr,
fin->sin_port, lin->sin_addr, lin->sin_port);
break;
}
if (dodrop) {
if (inp && (tp = intotcpcb(inp)) &&
((inp->inp_socket->so_options & SO_ACCEPTCONN) == 0))
tp = tcp_drop(tp, ECONNABORTED);
else
error = ESRCH;
splx(s);
return (error);
}
if (inp == NULL) {
++tcpstat.tcps_pcbhashmiss;
switch (tir.faddr.ss_family) {
#ifdef INET6
case AF_INET6:
inp = in6_pcblookup_listen(&tcbtable,
&l6, lin6->sin6_port, 0);
break;
#endif
case AF_INET:
inp = in_pcblookup_listen(&tcbtable,
lin->sin_addr, lin->sin_port, 0);
break;
}
}
if (inp != NULL && (inp->inp_socket->so_state & SS_CONNECTOUT)) {
tir.ruid = inp->inp_socket->so_ruid;
tir.euid = inp->inp_socket->so_euid;
} else {
tir.ruid = -1;
tir.euid = -1;
}
splx(s);
*oldlenp = sizeof (tir);
error = copyout((void *)&tir, oldp, sizeof (tir));
return (error);
}
/*
* Sysctl for tcp variables.
*/
int
tcp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
{
int error, nval;
/* All sysctl names at this level are terminal. */
if (namelen != 1)
return (ENOTDIR);
switch (name[0]) {
#ifdef TCP_SACK
case TCPCTL_SACK:
return (sysctl_int(oldp, oldlenp, newp, newlen,
&tcp_do_sack));
#endif
case TCPCTL_SLOWHZ:
return (sysctl_rdint(oldp, oldlenp, newp, PR_SLOWHZ));
case TCPCTL_BADDYNAMIC:
return (sysctl_struct(oldp, oldlenp, newp, newlen,
baddynamicports.tcp, sizeof(baddynamicports.tcp)));
case TCPCTL_IDENT:
return (tcp_ident(oldp, oldlenp, newp, newlen, 0));
case TCPCTL_DROP:
return (tcp_ident(oldp, oldlenp, newp, newlen, 1));
#ifdef TCP_ECN
case TCPCTL_ECN:
return (sysctl_int(oldp, oldlenp, newp, newlen,
&tcp_do_ecn));
#endif
case TCPCTL_REASS_LIMIT:
nval = tcp_reass_limit;
error = sysctl_int(oldp, oldlenp, newp, newlen, &nval);
if (error)
return (error);
if (nval != tcp_reass_limit) {
error = pool_sethardlimit(&tcpqe_pool, nval, NULL, 0);
if (error)
return (error);
tcp_reass_limit = nval;
}
return (0);
#ifdef TCP_SACK
case TCPCTL_SACKHOLE_LIMIT:
nval = tcp_sackhole_limit;
error = sysctl_int(oldp, oldlenp, newp, newlen, &nval);
if (error)
return (error);
if (nval != tcp_sackhole_limit) {
error = pool_sethardlimit(&sackhl_pool, nval, NULL, 0);
if (error)
return (error);
tcp_sackhole_limit = nval;
}
return (0);
#endif
default:
if (name[0] < TCPCTL_MAXID)
return (sysctl_int_arr(tcpctl_vars, name, namelen,
oldp, oldlenp, newp, newlen));
return (ENOPROTOOPT);
}
/* NOTREACHED */
}
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