FreeBSD-5.3/usr.sbin/ppp/ncp.c
/*-
* Copyright (c) 2001 Brian Somers <brian@Awfulhak.org>
* 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.
*
* 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: src/usr.sbin/ppp/ncp.c,v 1.5 2002/08/27 20:11:58 brian Exp $
*/
#include <sys/param.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <sys/socket.h>
#include <net/route.h>
#include <sys/un.h>
#include <errno.h>
#include <resolv.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include "layer.h"
#include "defs.h"
#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "timer.h"
#include "fsm.h"
#include "iplist.h"
#include "throughput.h"
#include "slcompress.h"
#include "lqr.h"
#include "hdlc.h"
#include "lcp.h"
#include "ncpaddr.h"
#include "ipcp.h"
#include "filter.h"
#include "descriptor.h"
#include "async.h"
#include "ccp.h"
#include "link.h"
#include "physical.h"
#include "mp.h"
#ifndef NORADIUS
#include "radius.h"
#endif
#include "ipv6cp.h"
#include "ncp.h"
#include "bundle.h"
#include "prompt.h"
#include "route.h"
#include "iface.h"
#include "chat.h"
#include "auth.h"
#include "chap.h"
#include "cbcp.h"
#include "datalink.h"
static u_short default_urgent_tcp_ports[] = {
21, /* ftp */
22, /* ssh */
23, /* telnet */
513, /* login */
514, /* shell */
543, /* klogin */
544 /* kshell */
};
static u_short default_urgent_udp_ports[] = { };
#define NDEFTCPPORTS \
(sizeof default_urgent_tcp_ports / sizeof default_urgent_tcp_ports[0])
#define NDEFUDPPORTS \
(sizeof default_urgent_udp_ports / sizeof default_urgent_udp_ports[0])
void
ncp_Init(struct ncp *ncp, struct bundle *bundle)
{
ncp->afq = AF_INET;
ncp->route = NULL;
ncp->cfg.urgent.tcp.nports = ncp->cfg.urgent.tcp.maxports = NDEFTCPPORTS;
ncp->cfg.urgent.tcp.port = (u_short *)malloc(NDEFTCPPORTS * sizeof(u_short));
memcpy(ncp->cfg.urgent.tcp.port, default_urgent_tcp_ports,
NDEFTCPPORTS * sizeof(u_short));
ncp->cfg.urgent.tos = 1;
ncp->cfg.urgent.udp.nports = ncp->cfg.urgent.udp.maxports = NDEFUDPPORTS;
ncp->cfg.urgent.udp.port = (u_short *)malloc(NDEFUDPPORTS * sizeof(u_short));
memcpy(ncp->cfg.urgent.udp.port, default_urgent_udp_ports,
NDEFUDPPORTS * sizeof(u_short));
mp_Init(&ncp->mp, bundle);
/* Send over the first physical link by default */
ipcp_Init(&ncp->ipcp, bundle, &bundle->links->physical->link,
&bundle->fsm);
#ifndef NOINET6
ipv6cp_Init(&ncp->ipv6cp, bundle, &bundle->links->physical->link,
&bundle->fsm);
#endif
}
void
ncp_Destroy(struct ncp *ncp)
{
ipcp_Destroy(&ncp->ipcp);
#ifndef NOINET6
ipv6cp_Destroy(&ncp->ipv6cp);
#endif
if (ncp->cfg.urgent.tcp.maxports) {
ncp->cfg.urgent.tcp.nports = ncp->cfg.urgent.tcp.maxports = 0;
free(ncp->cfg.urgent.tcp.port);
ncp->cfg.urgent.tcp.port = NULL;
}
if (ncp->cfg.urgent.udp.maxports) {
ncp->cfg.urgent.udp.nports = ncp->cfg.urgent.udp.maxports = 0;
free(ncp->cfg.urgent.udp.port);
ncp->cfg.urgent.udp.port = NULL;
}
}
int
ncp_fsmStart(struct ncp *ncp, struct bundle *bundle)
{
int res = 0;
#ifndef NOINET6
if (Enabled(bundle, OPT_IPCP)) {
#endif
fsm_Up(&ncp->ipcp.fsm);
fsm_Open(&ncp->ipcp.fsm);
res++;
#ifndef NOINET6
}
if (Enabled(bundle, OPT_IPV6CP)) {
fsm_Up(&ncp->ipv6cp.fsm);
fsm_Open(&ncp->ipv6cp.fsm);
res++;
}
#endif
return res;
}
void
ncp_IfaceAddrAdded(struct ncp *ncp, const struct iface_addr *addr)
{
switch (ncprange_family(&addr->ifa)) {
case AF_INET:
ipcp_IfaceAddrAdded(&ncp->ipcp, addr);
break;
#ifndef NOINET6
case AF_INET6:
ipv6cp_IfaceAddrAdded(&ncp->ipv6cp, addr);
break;
#endif
}
}
void
ncp_IfaceAddrDeleted(struct ncp *ncp, const struct iface_addr *addr)
{
if (ncprange_family(&addr->ifa) == AF_INET)
ipcp_IfaceAddrDeleted(&ncp->ipcp, addr);
}
void
ncp_SetLink(struct ncp *ncp, struct link *l)
{
ipcp_SetLink(&ncp->ipcp, l);
#ifndef NOINET6
ipv6cp_SetLink(&ncp->ipv6cp, l);
#endif
}
/*
* Enqueue a packet of the given address family. Nothing will make it
* down to the physical link level 'till ncp_FillPhysicalQueues() is used.
*/
void
ncp_Enqueue(struct ncp *ncp, int af, int pri, char *ptr, int count)
{
#ifndef NOINET6
struct ipv6cp *ipv6cp = &ncp->ipv6cp;
#endif
struct ipcp *ipcp = &ncp->ipcp;
struct mbuf *bp;
/*
* We allocate an extra 6 bytes, four at the front and two at the end.
* This is an optimisation so that we need to do less work in
* m_prepend() in acf_LayerPush() and proto_LayerPush() and
* appending in hdlc_LayerPush().
*/
switch (af) {
case AF_INET:
if (pri < 0 || pri >= IPCP_QUEUES(ipcp)) {
log_Printf(LogERROR, "Can't store in ip queue %d\n", pri);
break;
}
bp = m_get(count + 6, MB_IPOUT);
bp->m_offset += 4;
bp->m_len -= 6;
memcpy(MBUF_CTOP(bp), ptr, count);
m_enqueue(ipcp->Queue + pri, bp);
break;
#ifndef NOINET6
case AF_INET6:
if (pri < 0 || pri >= IPV6CP_QUEUES(ipcp)) {
log_Printf(LogERROR, "Can't store in ipv6 queue %d\n", pri);
break;
}
bp = m_get(count + 6, MB_IPOUT);
bp->m_offset += 4;
bp->m_len -= 6;
memcpy(MBUF_CTOP(bp), ptr, count);
m_enqueue(ipv6cp->Queue + pri, bp);
break;
#endif
default:
log_Printf(LogERROR, "Can't enqueue protocol family %d\n", af);
}
}
/*
* How many packets are queued to go out ?
*/
size_t
ncp_QueueLen(struct ncp *ncp)
{
size_t result;
result = ipcp_QueueLen(&ncp->ipcp);
#ifndef NOINET6
result += ipv6cp_QueueLen(&ncp->ipv6cp);
#endif
result += mp_QueueLen(&ncp->mp); /* Usually empty */
return result;
}
/*
* Ditch all queued packets. This is usually done after our choked timer
* has fired - which happens because we couldn't send any traffic over
* any links for some time.
*/
void
ncp_DeleteQueues(struct ncp *ncp)
{
#ifndef NOINET6
struct ipv6cp *ipv6cp = &ncp->ipv6cp;
#endif
struct ipcp *ipcp = &ncp->ipcp;
struct mp *mp = &ncp->mp;
struct mqueue *q;
for (q = ipcp->Queue; q < ipcp->Queue + IPCP_QUEUES(ipcp); q++)
while (q->top)
m_freem(m_dequeue(q));
#ifndef NOINET6
for (q = ipv6cp->Queue; q < ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp); q++)
while (q->top)
m_freem(m_dequeue(q));
#endif
link_DeleteQueue(&mp->link); /* Usually empty anyway */
}
/*
* Arrange that each of our links has at least one packet. We keep the
* number of packets queued at the link level to a minimum so that the
* loss of a link in multi-link mode results in the minimum number of
* dropped packets.
*/
size_t
ncp_FillPhysicalQueues(struct ncp *ncp, struct bundle *bundle)
{
size_t total;
if (bundle->ncp.mp.active)
total = mp_FillPhysicalQueues(bundle);
else {
struct datalink *dl;
size_t add;
for (total = 0, dl = bundle->links; dl; dl = dl->next)
if (dl->state == DATALINK_OPEN) {
add = link_QueueLen(&dl->physical->link);
if (add == 0 && dl->physical->out == NULL)
add = ncp_PushPacket(ncp, &ncp->afq, &dl->physical->link);
total += add;
}
}
return total + ncp_QueueLen(&bundle->ncp);
}
/*
* Push a packet into the given link. ``af'' is used as a persistent record
* of what is to be pushed next, coming either from mp->out or ncp->afq.
*/
int
ncp_PushPacket(struct ncp *ncp, int *af, struct link *l)
{
struct bundle *bundle = l->lcp.fsm.bundle;
int res;
#ifndef NOINET6
if (*af == AF_INET) {
if ((res = ipcp_PushPacket(&bundle->ncp.ipcp, l)))
*af = AF_INET6;
else
res = ipv6cp_PushPacket(&bundle->ncp.ipv6cp, l);
} else {
if ((res = ipv6cp_PushPacket(&bundle->ncp.ipv6cp, l)))
*af = AF_INET;
else
res = ipcp_PushPacket(&bundle->ncp.ipcp, l);
}
#else
res = ipcp_PushPacket(&bundle->ncp.ipcp, l);
#endif
return res;
}
int
ncp_IsUrgentPort(struct port_range *range, u_short src, u_short dst)
{
int f;
for (f = 0; f < range->nports; f++)
if (range->port[f] == src || range->port[f] == dst)
return 1;
return 0;
}
void
ncp_AddUrgentPort(struct port_range *range, u_short port)
{
u_short *newport;
int p;
if (range->nports == range->maxports) {
range->maxports += 10;
newport = (u_short *)realloc(range->port,
range->maxports * sizeof(u_short));
if (newport == NULL) {
log_Printf(LogERROR, "ncp_AddUrgentPort: realloc: %s\n",
strerror(errno));
range->maxports -= 10;
return;
}
range->port = newport;
}
for (p = 0; p < range->nports; p++)
if (range->port[p] == port) {
log_Printf(LogWARN, "%u: Port already set to urgent\n", port);
break;
} else if (range->port[p] > port) {
memmove(range->port + p + 1, range->port + p,
(range->nports - p) * sizeof(u_short));
range->port[p] = port;
range->nports++;
break;
}
if (p == range->nports)
range->port[range->nports++] = port;
}
void
ncp_RemoveUrgentPort(struct port_range *range, u_short port)
{
int p;
for (p = 0; p < range->nports; p++)
if (range->port[p] == port) {
if (p != range->nports - 1)
memmove(range->port + p, range->port + p + 1,
(range->nports - p - 1) * sizeof(u_short));
range->nports--;
return;
}
if (p == range->nports)
log_Printf(LogWARN, "%u: Port not set to urgent\n", port);
}
void
ncp_ClearUrgentPorts(struct port_range *range)
{
range->nports = 0;
}
int
ncp_Show(struct cmdargs const *arg)
{
struct ncp *ncp = &arg->bundle->ncp;
int p;
#ifndef NOINET6
prompt_Printf(arg->prompt, "Next queued AF: %s\n",
ncp->afq == AF_INET6 ? "inet6" : "inet");
#endif
if (ncp->route) {
prompt_Printf(arg->prompt, "\n");
route_ShowSticky(arg->prompt, ncp->route, "Sticky routes", 1);
}
prompt_Printf(arg->prompt, "\nDefaults:\n");
prompt_Printf(arg->prompt, " sendpipe: ");
if (ncp->cfg.sendpipe > 0)
prompt_Printf(arg->prompt, "%-20ld\n", ncp->cfg.sendpipe);
else
prompt_Printf(arg->prompt, "unspecified\n");
prompt_Printf(arg->prompt, " recvpipe: ");
if (ncp->cfg.recvpipe > 0)
prompt_Printf(arg->prompt, "%ld\n", ncp->cfg.recvpipe);
else
prompt_Printf(arg->prompt, "unspecified\n");
prompt_Printf(arg->prompt, "\n Urgent ports\n");
prompt_Printf(arg->prompt, " TCP: ");
if (ncp->cfg.urgent.tcp.nports == 0)
prompt_Printf(arg->prompt, "none");
else
for (p = 0; p < ncp->cfg.urgent.tcp.nports; p++) {
if (p)
prompt_Printf(arg->prompt, ", ");
prompt_Printf(arg->prompt, "%u", ncp->cfg.urgent.tcp.port[p]);
}
prompt_Printf(arg->prompt, "\n UDP: ");
if (ncp->cfg.urgent.udp.nports == 0)
prompt_Printf(arg->prompt, "none");
else
for (p = 0; p < ncp->cfg.urgent.udp.nports; p++) {
if (p)
prompt_Printf(arg->prompt, ", ");
prompt_Printf(arg->prompt, "%u", ncp->cfg.urgent.udp.port[p]);
}
prompt_Printf(arg->prompt, "\n TOS: %s\n\n",
ncp->cfg.urgent.tos ? "yes" : "no");
return 0;
}
int
ncp_LayersOpen(struct ncp *ncp)
{
int n;
n = !!(ncp->ipcp.fsm.state == ST_OPENED);
#ifndef NOINET6
n += !!(ncp->ipv6cp.fsm.state == ST_OPENED);
#endif
return n;
}
int
ncp_LayersUnfinished(struct ncp *ncp)
{
int n = 0;
if (ncp->ipcp.fsm.state > ST_CLOSED ||
ncp->ipcp.fsm.state == ST_STARTING)
n++;
#ifndef NOINET6
if (ncp->ipv6cp.fsm.state > ST_CLOSED ||
ncp->ipv6cp.fsm.state == ST_STARTING)
n++;
#endif
return n;
}
void
ncp_Close(struct ncp *ncp)
{
if (ncp->ipcp.fsm.state > ST_CLOSED ||
ncp->ipcp.fsm.state == ST_STARTING)
fsm_Close(&ncp->ipcp.fsm);
#ifndef NOINET6
if (ncp->ipv6cp.fsm.state > ST_CLOSED ||
ncp->ipv6cp.fsm.state == ST_STARTING)
fsm_Close(&ncp->ipv6cp.fsm);
#endif
}
void
ncp2initial(struct ncp *ncp)
{
fsm2initial(&ncp->ipcp.fsm);
#ifndef NOINET6
fsm2initial(&ncp->ipv6cp.fsm);
#endif
}