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This commit was manufactured by cvs2svn to create tag 'FreeBSD-release/1.0'.
[unix-history] / sys / netccitt / if_x25subr.c
/*
* Copyright (c) 1990 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* from: @(#)if_x25subr.c 7.14 (Berkeley) 6/26/91
* $Id$
*/
#include "param.h"
#include "systm.h"
#include "malloc.h"
#include "mbuf.h"
#include "protosw.h"
#include "socket.h"
#include "socketvar.h"
#include "ioctl.h"
#include "errno.h"
#include "syslog.h"
#include "../net/if.h"
#include "../net/if_types.h"
#include "../net/netisr.h"
#include "../net/route.h"
#include "x25.h"
#include "x25err.h"
#include "pk.h"
#include "pk_var.h"
#include "machine/mtpr.h"
#ifdef INET
#include "../netinet/in.h"
#include "../netinet/in_var.h"
#endif
#ifdef NS
#include "../netns/ns.h"
#include "../netns/ns_if.h"
#endif
#ifdef ISO
int tp_incoming();
#include "../netiso/argo_debug.h"
#include "../netiso/iso.h"
#include "../netiso/iso_var.h"
#endif
extern struct ifnet loif;
struct llinfo_x25 llinfo_x25 = {&llinfo_x25, &llinfo_x25};
struct sockaddr *x25_dgram_sockmask;
struct if_x25stats {
int ifx_wrongplen;
int ifx_nophdr;
} if_x25stats;
int x25_autoconnect = 0;
#define senderr(x) {error = x; goto bad;}
/*
* Ancillary routines
*/
static struct llinfo_x25 *
x25_lxalloc(rt)
register struct rtentry *rt;
{
register struct llinfo_x25 *lx;
register struct sockaddr *dst = rt_key(rt);
register struct ifaddr *ifa;
MALLOC(lx, struct llinfo_x25 *, sizeof (*lx), M_PCB, M_NOWAIT);
if (lx == 0)
return lx;
Bzero(lx, sizeof(*lx));
lx->lx_rt = rt;
lx->lx_family = dst->sa_family;
rt->rt_refcnt++;
if (rt->rt_llinfo)
insque(lx, (struct llinfo_x25 *)rt->rt_llinfo);
else {
rt->rt_llinfo = (caddr_t)lx;
insque(lx, &llinfo_x25);
}
for (ifa = rt->rt_ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family == AF_CCITT)
lx->lx_ia = (struct x25_ifaddr *)ifa;
}
return lx;
}
x25_lxfree(lx)
register struct llinfo_x25 *lx;
{
register struct rtentry *rt = lx->lx_rt;
register struct pklcd *lcp = lx->lx_lcd;
if (lcp) {
lcp->lcd_upper = 0;
pk_disconnect(lcp);
}
if ((rt->rt_llinfo == (caddr_t)lx) && (lx->lx_next->lx_rt == rt))
rt->rt_llinfo = (caddr_t)lx->lx_next;
else
rt->rt_llinfo = 0;
RTFREE(rt);
remque(lx);
FREE(lx, M_PCB);
}
/*
* Process a x25 packet as datagram;
*/
x25_ifinput(lcp, m)
struct pklcd *lcp;
register struct mbuf *m;
{
struct llinfo_x25 *lx = (struct llinfo_x25 *)lcp->lcd_upnext;
register struct ifnet *ifp;
struct ifqueue *inq;
extern struct timeval time;
int s, len, isr;
if (m == 0 || lcp->lcd_state != DATA_TRANSFER) {
x25_connect_callback(lcp, 0);
return;
}
pk_flowcontrol(lcp, 0, 1); /* Generate RR */
ifp = m->m_pkthdr.rcvif;
ifp->if_lastchange = time;
switch (m->m_type) {
case MT_OOBDATA:
if (m)
m_freem(m);
default:
return;
case MT_DATA:
/* FALLTHROUGH */;
}
switch (lx->lx_family) {
#ifdef INET
case AF_INET:
isr = NETISR_IP;
inq = &ipintrq;
break;
#endif
#ifdef NS
case AF_NS:
isr = NETISR_NS;
inq = &nsintrq;
break;
#endif
#ifdef ISO
case AF_ISO:
isr = NETISR_ISO;
inq = &clnlintrq;
break;
#endif
default:
m_freem(m);
ifp->if_noproto++;
return;
}
s = splimp();
schednetisr(isr);
if (IF_QFULL(inq)) {
IF_DROP(inq);
m_freem(m);
} else {
IF_ENQUEUE(inq, m);
ifp->if_ibytes += m->m_pkthdr.len;
}
splx(s);
}
x25_connect_callback(lcp, m)
register struct pklcd *lcp;
register struct mbuf *m;
{
register struct llinfo_x25 *lx = (struct llinfo_x25 *)lcp->lcd_upnext;
if (m == 0)
goto refused;
if (m->m_type != MT_CONTROL) {
printf("x25_connect_callback: should panic\n");
goto refused;
}
switch (pk_decode(mtod(m, struct x25_packet *))) {
case CALL_ACCEPTED:
lcp->lcd_upper = x25_ifinput;
if (lcp->lcd_sb.sb_mb)
lcp->lcd_send(lcp); /* XXX start queued packets */
return;
default:
refused:
lcp->lcd_upper = 0;
lx->lx_lcd = 0;
pk_disconnect(lcp);
return;
}
}
#define SA(p) ((struct sockaddr *)(p))
#define RT(p) ((struct rtentry *)(p))
x25_dgram_incoming(lcp, m0)
register struct pklcd *lcp;
struct mbuf *m0;
{
register struct rtentry *rt, *nrt;
register struct mbuf *m = m0->m_next; /* m0 has calling sockaddr_x25 */
int x25_rtrequest();
rt = rtalloc1(SA(&lcp->lcd_faddr), 0);
if (rt == 0) {
refuse: lcp->lcd_upper = 0;
pk_close(lcp);
return;
}
rt->rt_refcnt--;
if ((nrt = RT(rt->rt_llinfo)) == 0 || rt_mask(rt) != x25_dgram_sockmask)
goto refuse;
if ((nrt->rt_flags & RTF_UP) == 0) {
rt->rt_llinfo = (caddr_t)rtalloc1(rt->rt_gateway, 0);
rtfree(nrt);
if ((nrt = RT(rt->rt_llinfo)) == 0)
goto refuse;
nrt->rt_refcnt--;
}
if (nrt->rt_ifa == 0 || nrt->rt_ifa->ifa_rtrequest != x25_rtrequest)
goto refuse;
lcp->lcd_send(lcp); /* confirm call */
x25_rtattach(lcp, nrt);
m_freem(m);
}
/*
* X.25 output routine.
*/
x25_ifoutput(ifp, m0, dst, rt)
struct ifnet *ifp;
struct mbuf *m0;
struct sockaddr *dst;
register struct rtentry *rt;
{
register struct mbuf *m = m0;
register struct llinfo_x25 *lx;
struct pklcd *lcp;
int s, error = 0;
int plen;
for (plen = 0; m; m = m->m_next)
plen += m->m_len;
m = m0;
if ((ifp->if_flags & IFF_UP) == 0)
senderr(ENETDOWN);
while (rt == 0 || (rt->rt_flags & RTF_GATEWAY)) {
if (rt) {
if (rt->rt_llinfo) {
rt = (struct rtentry *)rt->rt_llinfo;
continue;
}
dst = rt->rt_gateway;
}
if ((rt = rtalloc1(dst, 1)) == 0)
senderr(EHOSTUNREACH);
rt->rt_refcnt--;
}
/*
* Sanity checks.
*/
if ((rt->rt_ifp != ifp) ||
(rt->rt_flags & (RTF_CLONING | RTF_GATEWAY)) ||
((lx = (struct llinfo_x25 *)rt->rt_llinfo) == 0)) {
senderr(ENETUNREACH);
}
if ((m->m_flags & M_PKTHDR) == 0) {
if_x25stats.ifx_nophdr++;
m = m_gethdr(M_NOWAIT, MT_HEADER);
if (m == 0)
senderr(ENOBUFS);
m->m_pkthdr.len = plen;
m->m_next = m0;
}
if (plen != m->m_pkthdr.len) {
if_x25stats.ifx_wrongplen++;
m->m_pkthdr.len = plen;
}
next_circuit:
lcp = lx->lx_lcd;
if (lcp == 0) {
lx->lx_lcd = lcp = pk_attach((struct socket *)0);
if (lcp == 0)
senderr(ENOBUFS);
lcp->lcd_upper = x25_connect_callback;
lcp->lcd_upnext = (caddr_t)lx;
lcp->lcd_packetsize = lx->lx_ia->ia_xc.xc_psize;
lcp->lcd_flags = X25_MBS_HOLD;
}
switch (lcp->lcd_state) {
case READY:
if (dst->sa_family == AF_INET &&
ifp->if_type == IFT_X25DDN &&
rt->rt_gateway->sa_family != AF_CCITT)
x25_ddnip_to_ccitt(dst, rt);
if (rt->rt_gateway->sa_family != AF_CCITT) {
if ((rt->rt_flags & RTF_XRESOLVE) == 0)
senderr(EHOSTUNREACH);
} else if (x25_autoconnect)
error = pk_connect(lcp,
(struct sockaddr_x25 *)rt->rt_gateway);
if (error)
senderr(error);
/* FALLTHROUGH */
case SENT_CALL:
case DATA_TRANSFER:
if (sbspace(&lcp->lcd_sb) < 0) {
lx = lx->lx_next;
if (lx->lx_rt != rt)
senderr(ENOSPC);
goto next_circuit;
}
if (lx->lx_ia)
lcp->lcd_dg_timer =
lx->lx_ia->ia_xc.xc_dg_idletimo;
pk_send(lcp, m);
break;
default:
/*
* We count on the timer routine to close idle
* connections, if there are not enough circuits to go
* around.
*
* So throw away data for now.
* After we get it all working, we'll rewrite to handle
* actively closing connections (other than by timers),
* when circuits get tight.
*
* In the DDN case, the imp itself closes connections
* under heavy load.
*/
error = ENOBUFS;
bad:
if (m)
m_freem(m);
}
return (error);
}
/*
* Simpleminded timer routine.
*/
x25_iftimeout(ifp)
struct ifnet *ifp;
{
register struct pkcb *pkcb = 0;
register struct pklcd **lcpp, *lcp;
int s = splimp();
for (pkcb = pkcbhead; pkcb; pkcb = pkcb->pk_next)
if (pkcb->pk_ia->ia_ifp == ifp)
for (lcpp = pkcb->pk_chan + pkcb->pk_maxlcn;
--lcpp > pkcb->pk_chan;)
if ((lcp = *lcpp) &&
lcp->lcd_state == DATA_TRANSFER &&
(lcp->lcd_flags & X25_DG_CIRCUIT) &&
(lcp->lcd_dg_timer && --lcp->lcd_dg_timer == 0)) {
lcp->lcd_upper(lcp, 0);
}
splx(s);
}
/*
* This routine gets called when validating additions of new routes
* or deletions of old ones.
*/
x25_rtrequest(cmd, rt, dst)
register struct rtentry *rt;
struct sockaddr *dst;
{
register struct llinfo_x25 *lx = (struct llinfo_x25 *)rt->rt_llinfo;
register struct sockaddr_x25 *sa =(struct sockaddr_x25 *)rt->rt_gateway;
register struct pklcd *lcp;
if (rt->rt_flags & RTF_GATEWAY) {
if (rt->rt_llinfo)
RTFREE((struct rtentry *)rt->rt_llinfo);
rt->rt_llinfo = (cmd == RTM_ADD) ?
(caddr_t)rtalloc1(rt->rt_gateway, 1) : 0;
return;
}
if ((rt->rt_flags & RTF_HOST) == 0)
return;
if (cmd == RTM_DELETE) {
while (rt->rt_llinfo)
x25_lxfree((struct llinfo *)rt->rt_llinfo);
x25_rtinvert(RTM_DELETE, rt->rt_gateway, rt);
return;
}
if (lx == 0 && (lx = x25_lxalloc(rt)) == 0)
return;
if ((lcp = lx->lx_lcd) && lcp->lcd_state != READY) {
/*
* This can only happen on a RTM_CHANGE operation
* though cmd will be RTM_ADD.
*/
if (lcp->lcd_ceaddr &&
Bcmp(rt->rt_gateway, lcp->lcd_ceaddr,
lcp->lcd_ceaddr->x25_len) != 0) {
x25_rtinvert(RTM_DELETE, lcp->lcd_ceaddr, rt);
lcp->lcd_upper = 0;
pk_disconnect(lcp);
}
lcp = 0;
}
x25_rtinvert(RTM_ADD, rt->rt_gateway, rt);
}
int x25_dont_rtinvert = 0;
x25_rtinvert(cmd, sa, rt)
register struct sockaddr *sa;
register struct rtentry *rt;
{
struct rtentry *rt2 = 0;
/*
* rt_gateway contains PID indicating which proto
* family on the other end, so will be different
* from general host route via X.25.
*/
if (rt->rt_ifp->if_type == IFT_X25DDN || x25_dont_rtinvert)
return;
if (sa->sa_family != AF_CCITT)
return;
if (cmd != RTM_DELETE) {
rtrequest(RTM_ADD, sa, rt_key(rt), x25_dgram_sockmask,
RTF_PROTO2, &rt2);
if (rt2) {
rt2->rt_llinfo = (caddr_t) rt;
rt->rt_refcnt++;
}
return;
}
rt2 = rt;
if ((rt = rtalloc1(sa, 0)) == 0 ||
(rt->rt_flags & RTF_PROTO2) == 0 ||
rt->rt_llinfo != (caddr_t)rt2) {
printf("x25_rtchange: inverse route screwup\n");
return;
} else
rt2->rt_refcnt--;
rtrequest(RTM_DELETE, sa, rt_key(rt2), x25_dgram_sockmask,
0, (struct rtentry **) 0);
}
static struct sockaddr_x25 blank_x25 = {sizeof blank_x25, AF_CCITT};
/*
* IP to X25 address routine copyright ACC, used by permission.
*/
union imp_addr {
struct in_addr ip;
struct imp {
u_char s_net;
u_char s_host;
u_char s_lh;
u_char s_impno;
} imp;
};
/*
* The following is totally bogus and here only to preserve
* the IP to X.25 translation.
*/
x25_ddnip_to_ccitt(src, rt)
struct sockaddr_in *src;
register struct rtentry *rt;
{
register struct sockaddr_x25 *dst = (struct sockaddr_x25 *)rt->rt_gateway;
union imp_addr imp_addr;
int imp_no, imp_port, temp;
char *x25addr = dst->x25_addr;
imp_addr.ip = src->sin_addr;
*dst = blank_x25;
if ((imp_addr.imp.s_net & 0x80) == 0x00) { /* class A */
imp_no = imp_addr.imp.s_impno;
imp_port = imp_addr.imp.s_host;
} else if ((imp_addr.imp.s_net & 0xc0) == 0x80) { /* class B */
imp_no = imp_addr.imp.s_impno;
imp_port = imp_addr.imp.s_lh;
} else { /* class C */
imp_no = imp_addr.imp.s_impno / 32;
imp_port = imp_addr.imp.s_impno % 32;
}
x25addr[0] = 12; /* length */
/* DNIC is cleared by struct copy above */
if (imp_port < 64) { /* Physical: 0000 0 IIIHH00 [SS] *//* s_impno
* -> III, s_host -> HH */
x25addr[5] = 0; /* set flag bit */
x25addr[6] = imp_no / 100;
x25addr[7] = (imp_no % 100) / 10;
x25addr[8] = imp_no % 10;
x25addr[9] = imp_port / 10;
x25addr[10] = imp_port % 10;
} else { /* Logical: 0000 1 RRRRR00 [SS] *//* s
* _host * 256 + s_impno -> RRRRR */
temp = (imp_port << 8) + imp_no;
x25addr[5] = 1;
x25addr[6] = temp / 10000;
x25addr[7] = (temp % 10000) / 1000;
x25addr[8] = (temp % 1000) / 100;
x25addr[9] = (temp % 100) / 10;
x25addr[10] = temp % 10;
}
}
/*
* This routine is a sketch and is not to be believed!!!!!
*
* This is a utility routine to be called by x25 devices when a
* call request is honored with the intent of starting datagram forwarding.
*/
x25_dg_rtinit(dst, ia, af)
struct sockaddr_x25 *dst;
register struct x25_ifaddr *ia;
{
struct sockaddr *sa = 0;
struct rtentry *rt;
struct in_addr my_addr;
static struct sockaddr_in sin = {sizeof(sin), AF_INET};
if (ia->ia_ifp->if_type == IFT_X25DDN && af == AF_INET) {
/*
* Inverse X25 to IP mapping copyright and courtesy ACC.
*/
int imp_no, imp_port, temp;
union imp_addr imp_addr;
{
/*
* First determine our IP addr for network
*/
register struct in_ifaddr *ina;
extern struct in_ifaddr *in_ifaddr;
for (ina = in_ifaddr; ina; ina = ina->ia_next)
if (ina->ia_ifp == ia->ia_ifp) {
my_addr = ina->ia_addr.sin_addr;
break;
}
}
{
register char *x25addr = dst->x25_addr;
switch (x25addr[5] & 0x0f) {
case 0: /* Physical: 0000 0 IIIHH00 [SS] */
imp_no =
((int) (x25addr[6] & 0x0f) * 100) +
((int) (x25addr[7] & 0x0f) * 10) +
((int) (x25addr[8] & 0x0f));
imp_port =
((int) (x25addr[9] & 0x0f) * 10) +
((int) (x25addr[10] & 0x0f));
break;
case 1: /* Logical: 0000 1 RRRRR00 [SS] */
temp = ((int) (x25addr[6] & 0x0f) * 10000)
+ ((int) (x25addr[7] & 0x0f) * 1000)
+ ((int) (x25addr[8] & 0x0f) * 100)
+ ((int) (x25addr[9] & 0x0f) * 10)
+ ((int) (x25addr[10] & 0x0f));
imp_port = temp >> 8;
imp_no = temp & 0xff;
break;
default:
return (0L);
}
imp_addr.ip = my_addr;
if ((imp_addr.imp.s_net & 0x80) == 0x00) {
/* class A */
imp_addr.imp.s_host = imp_port;
imp_addr.imp.s_impno = imp_no;
imp_addr.imp.s_lh = 0;
} else if ((imp_addr.imp.s_net & 0xc0) == 0x80) {
/* class B */
imp_addr.imp.s_lh = imp_port;
imp_addr.imp.s_impno = imp_no;
} else {
/* class C */
imp_addr.imp.s_impno = (imp_no << 5) + imp_port;
}
}
sin.sin_addr = imp_addr.ip;
sa = (struct sockaddr *)&sin;
} else {
/*
* This uses the X25 routing table to do inverse
* lookup of x25 address to sockaddr.
*/
if (rt = rtalloc1(dst, 0)) {
sa = rt->rt_gateway;
rt->rt_refcnt--;
}
}
/*
* Call to rtalloc1 will create rtentry for reverse path
* to callee by virtue of cloning magic and will allocate
* space for local control block.
*/
if (sa && (rt = rtalloc1(sa, 1)))
rt->rt_refcnt--;
}
#ifndef _offsetof
#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
#endif
struct sockaddr_x25 x25_dgmask = {
_offsetof(struct sockaddr_x25, x25_udata[1]), /* _len */
0, /* _family */
0, /* _net */
{ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, /* _addr */
{0}, /* opts */
-1, /* _udlen */
{-1} /* _udata */
};
int x25_startproto = 1;
struct radix_tree_head *x25_rnhead;
pk_init()
{
/*
* warning, sizeof (struct sockaddr_x25) > 32,
* but contains no data of interest beyond 32
*/
struct radix_node *rn_addmask();
rn_inithead(&x25_rnhead, 32, AF_CCITT);
x25_dgram_sockmask =
SA(rn_addmask((caddr_t)&x25_dgmask, 0, 4)->rn_key);
if (x25_startproto) {
pk_protolisten(0xcc, 1, x25_dgram_incoming);
pk_protolisten(0x81, 1, x25_dgram_incoming);
}
}
struct x25_dgproto {
u_char spi;
u_char spilen;
int (*f)();
} x25_dgprototab[] = {
#if defined(ISO) && defined(TPCONS)
{ 0x0, 0, tp_incoming},
#endif
{ 0xcc, 1, x25_dgram_incoming},
{ 0xcd, 1, x25_dgram_incoming},
{ 0x81, 1, x25_dgram_incoming},
};
pk_user_protolisten(info)
register u_char *info;
{
register struct x25_dgproto *dp = x25_dgprototab
+ ((sizeof x25_dgprototab) / (sizeof *dp));
register struct pklcd *lcp;
while (dp > x25_dgprototab)
if ((--dp)->spi == info[0])
goto gotspi;
return ESRCH;
gotspi: if (info[1])
return pk_protolisten(dp->spi, dp->spilen, dp->f);
for (lcp = pk_listenhead; lcp; lcp = lcp->lcd_listen)
if (lcp->lcd_laddr.x25_udlen == dp->spilen &&
Bcmp(&dp->spi, lcp->lcd_laddr.x25_udata, dp->spilen) == 0) {
pk_disconnect(lcp);
return 0;
}
return ESRCH;
}
/*
* This routine transfers an X.25 circuit to or from a routing entry.
* If the supplied circuit is * in DATA_TRANSFER state, it is added to the
* routing entry. If freshly allocated, it glues back the vc from
* the rtentry to the socket.
*/
pk_rtattach(so, m0)
register struct socket *so;
struct mbuf *m0;
{
register struct pklcd *lcp = (struct pklcd *)so->so_pcb;
register struct mbuf *m = m0;
struct sockaddr *dst = mtod(m, struct sockaddr *);
register struct rtentry *rt = rtalloc1(dst, 0);
register struct llinfo_x25 *lx;
caddr_t cp;
#define ROUNDUP(a) \
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
#define transfer_sockbuf(s, f, l) \
while (m = (s)->sb_mb)\
{(s)->sb_mb = m->m_act; m->m_act = 0; sbfree((s), m); f(l, m);}
if (rt)
rt->rt_refcnt--;
cp = (dst->sa_len < m->m_len) ? ROUNDUP(dst->sa_len) + (caddr_t)dst : 0;
while (rt &&
((cp == 0 && rt_mask(rt) != 0) ||
(cp != 0 && (rt_mask(rt) == 0 ||
Bcmp(cp, rt_mask(rt), rt_mask(rt)->sa_len)) != 0)))
rt = (struct rtentry *)rt->rt_nodes->rn_dupedkey;
if (rt == 0 || (rt->rt_flags & RTF_GATEWAY) ||
(lx = (struct llinfo_x25 *)rt->rt_llinfo) == 0)
return ESRCH;
if (lcp == 0)
return ENOTCONN;
switch (lcp->lcd_state) {
default:
return ENOTCONN;
case READY:
/* Detach VC from rtentry */
if (lx->lx_lcd == 0)
return ENOTCONN;
lcp->lcd_so = 0;
pk_close(lcp);
lcp = lx->lx_lcd;
if (lx->lx_next->lx_rt == rt)
x25_lxfree(lx);
lcp->lcd_so = so;
lcp->lcd_upper = 0;
lcp->lcd_upnext = 0;
transfer_sockbuf(&lcp->lcd_sb, sbappendrecord, &so->so_snd);
soisconnected(so);
return 0;
case DATA_TRANSFER:
/* Add VC to rtentry */
lcp->lcd_so = 0;
lcp->lcd_sb = so->so_snd; /* structure copy */
bzero((caddr_t)&so->so_snd, sizeof(so->so_snd)); /* XXXXXX */
so->so_pcb = 0;
x25_rtattach(lcp, rt);
transfer_sockbuf(&so->so_rcv, x25_ifinput, lcp);
soisdisconnected(so);
}
return 0;
}
x25_rtattach(lcp0, rt)
register struct pklcd *lcp0;
struct rtentry *rt;
{
register struct llinfo_x25 *lx = (struct llinfo_x25 *)rt->rt_llinfo;
register struct pklcd *lcp;
register struct mbuf *m;
if (lcp = lx->lx_lcd) { /* adding an additional VC */
if (lcp->lcd_state == READY) {
transfer_sockbuf(&lcp->lcd_sb, pk_output, lcp0);
lcp->lcd_upper = 0;
pk_close(lcp);
} else {
lx = x25_lxalloc(rt);
if (lx == 0)
return ENOBUFS;
}
}
lx->lx_lcd = lcp = lcp0;
lcp->lcd_upper = x25_ifinput;
lcp->lcd_upnext = (caddr_t)lx;
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.