/*
* Copyright (c) 1999, 2001 Boris Popov
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*
* $FreeBSD$
*
* Low level socket routines
*/
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/kernel.h>
#include <sys/uio.h>
#include <sys/syslog.h>
#include <sys/mbuf.h>
#include <sys/condvar.h>
#include <net/route.h>
#include <netipx/ipx.h>
#include <netipx/ipx_pcb.h>
#include <netncp/ncp.h>
#include <netncp/ncp_conn.h>
#include <netncp/ncp_sock.h>
#include <netncp/ncp_subr.h>
#include <netncp/ncp_rq.h>
#define ipx_setnullnet(x) ((x).x_net.s_net[0]=0); ((x).x_net.s_net[1]=0);
#define ipx_setnullhost(x) ((x).x_host.s_host[0] = 0); \
((x).x_host.s_host[1] = 0); ((x).x_host.s_host[2] = 0);
/*int ncp_poll(struct socket *so, int events);*/
/*static int ncp_getsockname(struct socket *so, caddr_t asa, int *alen);*/
static int ncp_soconnect(struct socket *so,struct sockaddr *target, struct proc *p);
/* This will need only if native IP used, or (unlikely) NCP will be
* implemented on the socket level
*/
static int
ncp_soconnect(struct socket *so,struct sockaddr *target, struct proc *p) {
int error,s;
error = soconnect(so, (struct sockaddr*)target, p);
if (error)
return error;
/*
* Wait for the connection to complete. Cribbed from the
* connect system call but with the wait timing out so
* that interruptible mounts don't hang here for a long time.
*/
error = EIO;
s = splnet();
while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
(void) tsleep((caddr_t)&so->so_timeo, PSOCK, "ncpcon", 2 * hz);
if ((so->so_state & SS_ISCONNECTING) &&
so->so_error == 0 /*&& rep &&*/) {
so->so_state &= ~SS_ISCONNECTING;
splx(s);
goto bad;
}
}
if (so->so_error) {
error = so->so_error;
so->so_error = 0;
splx(s);
goto bad;
}
splx(s);
error=0;
bad:
return error;
}
#ifdef notyet
static int
ncp_getsockname(struct socket *so, caddr_t asa, int *alen) {
struct sockaddr *sa;
int len=0, error;
sa = 0;
error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, &sa);
if (error==0) {
if (sa) {
len = min(len, sa->sa_len);
bcopy(sa, (caddr_t)asa, (u_int)len);
}
*alen=len;
}
if (sa)
FREE(sa, M_SONAME);
return (error);
}
#endif
int ncp_sock_recv(struct socket *so, struct mbuf **mp, int *rlen)
{
struct uio auio;
struct proc *p=curproc; /* XXX */
int error,flags,len;
auio.uio_resid = len = 1000000;
auio.uio_procp = p;
flags = MSG_DONTWAIT;
/* error = so->so_proto->pr_usrreqs->pru_soreceive(so, 0, &auio,
(struct mbuf **)0, (struct mbuf **)0, &flags);*/
error = so->so_proto->pr_usrreqs->pru_soreceive(so, 0, &auio,
mp, (struct mbuf **)0, &flags);
*rlen = len - auio.uio_resid;
/* if (!error) {
*rlen=iov.iov_len;
} else
*rlen=0;*/
#ifdef NCP_SOCKET_DEBUG
if (error)
printf("ncp_recv: err=%d\n", error);
#endif
return (error);
}
int
ncp_sock_send(struct socket *so, struct mbuf *top, struct ncp_rq *rqp)
{
struct proc *p = curproc; /* XXX */
struct sockaddr *to = 0;
struct ncp_conn *conn = rqp->nr_conn;
struct mbuf *m;
int error, flags=0;
int sendwait;
for(;;) {
m = m_copym(top, 0, M_COPYALL, M_TRYWAIT);
/* NCPDDEBUG(m);*/
error = so->so_proto->pr_usrreqs->pru_sosend(so, to, 0, m, 0, flags, p);
if (error == 0 || error == EINTR || error == ENETDOWN)
break;
if (rqp->rexmit == 0) break;
rqp->rexmit--;
tsleep(&sendwait, PWAIT, "ncprsn", conn->li.timeout * hz);
error = ncp_chkintr(conn, p);
if (error == EINTR) break;
}
if (error) {
log(LOG_INFO, "ncp_send: error %d for server %s", error, conn->li.server);
}
return error;
}
int
ncp_poll(struct socket *so, int events){
struct proc *p = curproc;
struct ucred *cred=NULL;
return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, p);
}
int
ncp_sock_rselect(struct socket *so,struct proc *p, struct timeval *tv, int events)
{
struct timeval atv,rtv,ttv;
int timo,error=0;
if (tv) {
atv=*tv;
if (itimerfix(&atv)) {
error = EINVAL;
goto done_noproclock;
}
getmicrouptime(&rtv);
timevaladd(&atv, &rtv);
}
timo = 0;
PROC_LOCK(p);
p->p_flag |= P_SELECT;
PROC_UNLOCK(p);
error = ncp_poll(so, events);
PROC_LOCK(p);
if (error) {
error = 0;
goto done;
}
if (tv) {
getmicrouptime(&rtv);
if (timevalcmp(&rtv, &atv, >=)) {
/*
* An event of our interest may occur during locking a process.
* In order to avoid missing the event that occured during locking
* the process, test P_SELECT and rescan file descriptors if
* necessary.
*/
if ((p->p_flag & P_SELECT) == 0) {
p->p_flag |= P_SELECT;
PROC_UNLOCK(p);
error = ncp_poll(so, events);
PROC_LOCK(p);
}
goto done;
}
ttv=atv;
timevalsub(&ttv, &rtv);
timo = tvtohz(&ttv);
}
p->p_flag &= ~P_SELECT;
if (timo > 0)
error = cv_timedwait(&selwait, &p->p_mtx, timo);
else {
cv_wait(&selwait, &p->p_mtx);
error = 0;
}
done:
p->p_flag &= ~P_SELECT;
PROC_UNLOCK(p);
done_noproclock:
if (error == ERESTART) {
/* printf("Signal: %x", cursig(p));*/
error = 0;
}
return (error);
}
/*
* Connect to specified server via IPX
*/
static int
ncp_sock_connect_ipx(struct ncp_conn *conn)
{
struct sockaddr_ipx sipx;
struct ipxpcb *npcb;
struct proc *p = conn->procp;
int addrlen, error, count;
sipx.sipx_port = htons(0);
for (count = 0;;count++) {
if (count > (IPXPORT_WELLKNOWN-IPXPORT_RESERVED)*2) {
error = EADDRINUSE;
goto bad;
}
conn->ncp_so = conn->wdg_so = NULL;
checkbad(socreate(AF_IPX, &conn->ncp_so, SOCK_DGRAM, 0, p));
if (conn->li.opt & NCP_OPT_WDOG)
checkbad(socreate(AF_IPX, &conn->wdg_so, SOCK_DGRAM,0,p));
addrlen = sizeof(sipx);
sipx.sipx_family = AF_IPX;
ipx_setnullnet(sipx.sipx_addr);
ipx_setnullhost(sipx.sipx_addr);
sipx.sipx_len = addrlen;
error = sobind(conn->ncp_so, (struct sockaddr *)&sipx, p);
if (error == 0) {
if ((conn->li.opt & NCP_OPT_WDOG) == 0)
break;
sipx.sipx_addr = sotoipxpcb(conn->ncp_so)->ipxp_laddr;
sipx.sipx_port = htons(ntohs(sipx.sipx_port) + 1);
ipx_setnullnet(sipx.sipx_addr);
ipx_setnullhost(sipx.sipx_addr);
error = sobind(conn->wdg_so, (struct sockaddr *)&sipx, p);
}
if (!error) break;
if (error != EADDRINUSE) goto bad;
sipx.sipx_port = htons((ntohs(sipx.sipx_port)+4) & 0xfff8);
soclose(conn->ncp_so);
if (conn->wdg_so)
soclose(conn->wdg_so);
}
npcb = sotoipxpcb(conn->ncp_so);
npcb->ipxp_dpt = IPXPROTO_NCP;
/* IPXrouted must be running, i.e. route must be presented */
conn->li.ipxaddr.sipx_len = sizeof(struct sockaddr_ipx);
checkbad(ncp_soconnect(conn->ncp_so, &conn->li.saddr, p));
if (conn->wdg_so) {
sotoipxpcb(conn->wdg_so)->ipxp_laddr.x_net = npcb->ipxp_laddr.x_net;
sotoipxpcb(conn->wdg_so)->ipxp_laddr.x_host= npcb->ipxp_laddr.x_host;
}
if (!error) {
conn->flags |= NCPFL_SOCONN;
}
#ifdef NCPBURST
if (ncp_burst_enabled) {
checkbad(socreate(AF_IPX, &conn->bc_so, SOCK_DGRAM, 0, p));
bzero(&sipx, sizeof(sipx));
sipx.sipx_len = sizeof(sipx);
checkbad(sobind(conn->bc_so, (struct sockaddr *)&sipx, p));
checkbad(ncp_soconnect(conn->bc_so, &conn->li.saddr, p));
}
#endif
if (!error) {
conn->flags |= NCPFL_SOCONN;
ncp_sock_checksum(conn, 0);
}
return error;
bad:
ncp_sock_disconnect(conn);
return (error);
}
int
ncp_sock_checksum(struct ncp_conn *conn, int enable)
{
if (enable) {
sotoipxpcb(conn->ncp_so)->ipxp_flags |= IPXP_CHECKSUM;
} else {
sotoipxpcb(conn->ncp_so)->ipxp_flags &= ~IPXP_CHECKSUM;
}
return 0;
}
/*
* Connect to specified server via IP
*/
static int
ncp_sock_connect_in(struct ncp_conn *conn)
{
struct sockaddr_in sin;
struct proc *p=conn->procp;
int addrlen=sizeof(sin), error;
conn->flags = 0;
bzero(&sin,addrlen);
conn->ncp_so = conn->wdg_so = NULL;
checkbad(socreate(AF_INET, &conn->ncp_so, SOCK_DGRAM, IPPROTO_UDP, p));
sin.sin_family = AF_INET;
sin.sin_len = addrlen;
checkbad(sobind(conn->ncp_so, (struct sockaddr *)&sin, p));
checkbad(ncp_soconnect(conn->ncp_so,(struct sockaddr*)&conn->li.addr, p));
if (!error)
conn->flags |= NCPFL_SOCONN;
return error;
bad:
ncp_sock_disconnect(conn);
return (error);
}
int
ncp_sock_connect(struct ncp_conn *ncp)
{
int error;
switch (ncp->li.saddr.sa_family) {
case AF_IPX:
error = ncp_sock_connect_ipx(ncp);
break;
case AF_INET:
error = ncp_sock_connect_in(ncp);
break;
default:
return EPROTONOSUPPORT;
}
return error;
}
/*
* Connection expected to be locked
*/
int
ncp_sock_disconnect(struct ncp_conn *conn) {
register struct socket *so;
conn->flags &= ~(NCPFL_SOCONN | NCPFL_ATTACHED | NCPFL_LOGGED);
if (conn->ncp_so) {
so = conn->ncp_so;
conn->ncp_so = (struct socket *)0;
soshutdown(so, 2);
soclose(so);
}
if (conn->wdg_so) {
so = conn->wdg_so;
conn->wdg_so = (struct socket *)0;
soshutdown(so, 2);
soclose(so);
}
#ifdef NCPBURST
if (conn->bc_so) {
so = conn->bc_so;
conn->bc_so = (struct socket *)NULL;
soshutdown(so, 2);
soclose(so);
}
#endif
return 0;
}
static void
ncp_watchdog(struct ncp_conn *conn) {
char *buf;
struct mbuf *m;
int error, len, flags;
struct socket *so;
struct sockaddr *sa;
struct uio auio;
sa = NULL;
while (conn->wdg_so) { /* not a loop */
so = conn->wdg_so;
auio.uio_resid = len = 1000000;
auio.uio_procp = curproc;
flags = MSG_DONTWAIT;
error = so->so_proto->pr_usrreqs->pru_soreceive(so,
(struct sockaddr**)&sa, &auio, &m, (struct mbuf**)0, &flags);
if (error) break;
len -= auio.uio_resid;
NCPSDEBUG("got watch dog %d\n",len);
if (len != 2) break;
buf = mtod(m, char*);
if (buf[1] != '?') break;
buf[1] = 'Y';
error = so->so_proto->pr_usrreqs->pru_sosend(so, (struct sockaddr*)sa, 0, m, 0, 0, curproc);
NCPSDEBUG("send watch dog %d\n",error);
break;
}
if (sa) FREE(sa, M_SONAME);
return;
}
void
ncp_check_conn(struct ncp_conn *conn) {
int s;
if (conn == NULL || !(conn->flags & NCPFL_ATTACHED))
return;
s = splnet();
ncp_check_rq(conn);
splx(s);
if (conn->li.saddr.sa_family == AF_IPX)
ncp_watchdog(conn);
}
