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ipv6control.c
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ipv6control.c
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/*
* Layer Two Tunnelling Protocol Daemon
* Copyright (C) 1998 Adtran, Inc.
* Copyright (C) 2002 Jeff McAdams
*
* Mark Spencer
*
* This software is distributed under the terms
* of the GPL, which you should have received
* along with this source.
*
* Control Packet Handling
*
*/
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include "l2tp.h"
extern _u16 ppp_crc16_table[];
//RY: start
static int global_serno = 1;
//RY: end
struct buffer6 *new_outgoing6 (struct tunnel6 *t)
{
/*
* Make a new outgoing control packet
*/
struct buffer6 *tmp = new_buf6 (MAX_RECV_SIZE);
if (!tmp)
return NULL;
tmp->peer = t->peer;
tmp->start += sizeof (struct control_hdr);
tmp->len = 0;
tmp->retries = 0;
tmp->tunnel = t;
return tmp;
}
inline void recycle_outgoing6 (struct buffer6 *buf, struct sockaddr_in6 peer)
{
/*
* This should only be used for ZLB's!
*/
buf->start = buf->rstart + sizeof (struct control_hdr);
buf->peer = peer;
buf->len = 0;
buf->retries = -1;
buf->tunnel = NULL;
}
void add_fcs6 (struct buffer6 *buf)
{
_u16 fcs = PPP_INITFCS;
unsigned char *c = buf->start;
int x;
for (x = 0; x < buf->len; x++)
{
fcs = PPP_FCS (fcs, *c);
c++;
}
fcs = fcs ^ 0xFFFF;
*c = fcs & 0xFF;
c++;
*c = (fcs >> 8) & 0xFF;
buf->len += 2;
}
void add_control_hdr6 (struct tunnel6 *t, struct call6 *c, struct buffer6 *buf)
{
struct control_hdr *h;
buf->start -= sizeof (struct control_hdr);
buf->len += sizeof (struct control_hdr);
h = (struct control_hdr *) buf->start;
h->ver = htons (TBIT | LBIT | FBIT | VER_L2TP);
h->length = htons ((_u16) buf->len);
h->tid = htons (t->tid);
h->cid = htons (c->cid);
h->Ns = htons (t->control_seq_num);
h->Nr = htons (t->control_rec_seq_num);
t->control_seq_num++;
}
void hello6 (void *tun)
{
struct buffer6 *buf;
struct tunnel6 *t;
struct timeval tv;
tv.tv_sec = HELLO_DELAY;
tv.tv_usec = 0;
t = (struct tunnel6 *) tun;
buf = new_outgoing6 (t);
printf("*********************%d***************************\n", Hello);
add_message_type_avp6 (buf, Hello);
add_control_hdr6 (t, t->self, buf);
if (gconfig.packet_dump)
do_packet_dump6 (buf);
printf("length of buffer1:%d\n", buf->len);
#ifdef DEBUG_HELLO
l2tp_log (LOG_DEBUG, "%s: sending Hello on %d\n", __FUNCTION__, t->ourtid);
#endif
control_xmit_ipv6 (buf);
printf("length of buffer2:%d\n", buf->len);
/*
* Schedule another Hello in a little bit.
*/
#ifdef DEBUG_HELLO
l2tp_log (LOG_DEBUG, "%s: scheduling another Hello on %d\n", __FUNCTION__,
t->ourtid);
#endif
t->hello6 = schedule (tv, hello6, (void *) t);
}
void control_zlb6 (struct buffer6 *buf, struct tunnel6 *t, struct call6 *c)
{
recycle_outgoing6 (buf, t->peer);
add_control_hdr6 (t, c, buf);
t->control_seq_num--;
#ifdef DEBUG_ZLB
l2tp_log (LOG_DEBUG, "%s: sending control ZLB on tunnel6 %d\n", __FUNCTION__,
t->tid);
#endif
udp_xmit6 (buf, t);
}
int control_finish6 (struct tunnel6 *t, struct call6 *c)
{
/*
* After all AVP's have been handled, do anything else
* which needs to be done, like prepare response
* packets to go back. This is essentially the
* implementation of the state machine of section 7.2.1
*
* If we set c->needclose, the call (or tunnel6) will
* be closed upon return.
*/
struct buffer6 *buf;
struct call6 *p, *z;
struct tunnel6 *y;
struct timeval tv;
struct ppp_opts *po;
char ip1[STRLEN];
char ip2[STRLEN];
char dummy_buf[128] = "/var/l2tp/"; /* jz: needed to read /etc/ppp/var.options - just kick it if you dont like */
char passwdfd_buf[32] = ""; /* buffer6 for the fd, not the password */
int i;
int pppd_passwdfd[2];
int tmptid,tmpcid;
if (c->msgtype < 0)
{
l2tp_log (LOG_DEBUG, "%s: Whoa... non-ZLB with no message type!\n",
__FUNCTION__);
return -EINVAL;
}
if (gconfig.debug_state)
l2tp_log (LOG_DEBUG,
"%s: message type is %s(%d). tunnel6 is %d, call6 is %d.\n",
__FUNCTION__, msgtypes[c->msgtype], c->msgtype, t->tid, c->cid);
switch (c->msgtype)
{
case 0:
/*
* We need to initiate a connection.
*/
if (t->self == c)
{
if (t->lns)
{
t->ourrws = t->lns->tun_rws;
t->hbit = t->lns->hbit;
}
else if (t->lac)
{
t->ourrws = t->lac->tun_rws;
t->hbit = t->lac->hbit;
}
/* This is an attempt to bring up the tunnel6 */
t->state = SCCRQ;
buf = new_outgoing6 (t);
add_message_type_avp6 (buf, SCCRQ);
if (t->hbit)
{
mk_challenge (t->chal_them.vector, VECTOR_SIZE);
add_randvect_avp6 (buf, t->chal_them.vector, VECTOR_SIZE);
}
add_protocol_avp6 (buf);
add_frame_caps_avp6 (buf, t->ourfc);
add_bearer_caps_avp6 (buf, t->ourbc);
/* FIXME: Tie breaker */
add_firmware_avp6 (buf);
if (t->lac && t->lac->hostname && t->lac->hostname[0])
add_hostname_avp6 (buf, t->lac->hostname);
else if (t->lns && t->lns->hostname && t->lns->hostname[0])
add_hostname_avp6 (buf, t->lns->hostname);
else
add_hostname_avp6 (buf, hostname);
add_vendor_avp6 (buf);
add_tunnelid_avp6 (buf, t->ourtid);
if (t->ourrws >= 0)
add_avp_rws6 (buf, t->ourrws);
if ((t->lac && t->lac->challenge)
|| (t->lns && t->lns->challenge))
{
if (t->chal_them.challenge)
free(t->chal_them.challenge);
t->chal_them.challenge = malloc(MD_SIG_SIZE);
if (!(t->chal_them.challenge))
{
l2tp_log (LOG_WARNING, "%s: malloc failed for challenge\n",
__FUNCTION__);
toss6 (buf);
return -EINVAL;
}
mk_challenge (t->chal_them.challenge, MD_SIG_SIZE);
t->chal_them.chal_len = MD_SIG_SIZE;
add_challenge_avp6 (buf, t->chal_them.challenge,
t->chal_them.chal_len);
t->chal_them.state = STATE_CHALLENGED;
/* We generate the challenge and make a note that we plan to
challenge the peer, but we can't predict the response yet
because we don't know their hostname AVP */
}
add_control_hdr6 (t, c, buf);
c->cnu = 0;
if (gconfig.packet_dump)
do_packet_dump6 (buf);
if (gconfig.debug_state)
l2tp_log (LOG_DEBUG, "%s: sending SCCRQ\n",
__FUNCTION__);
control_xmit_ipv6 (buf);
}
else
{
if (switch_io)
{
c->state = ICRQ;
if (c->lns)
{
c->lbit = c->lns->lbit ? LBIT : 0;
/* c->ourrws = c->lns->call_rws;
if (c->ourrws > -1) c->ourfbit = FBIT; else c->ourfbit = 0; */
}
else if (c->lac)
{
c->lbit = c->lac->lbit ? LBIT : 0;
/* c->ourrws = c->lac->call_rws;
if (c->ourrws > -1) c->ourfbit = FBIT; else c->ourfbit = 0; */
}
buf = new_outgoing6 (t);
add_message_type_avp6 (buf, ICRQ);
if (t->hbit)
{
mk_challenge (t->chal_them.vector, VECTOR_SIZE);
add_randvect_avp6 (buf, t->chal_them.vector, VECTOR_SIZE);
}
#ifdef TEST_HIDDEN
add_callid_avp6 (buf, c->ourcid, t);
#else
add_callid_avp6 (buf, c->ourcid);
#endif
add_serno_avp6 (buf, global_serno);
c->serno = global_serno;
global_serno++;
add_bearer_avp6 (buf, 0);
add_control_hdr6 (t, c, buf);
c->cnu = 0;
if (gconfig.packet_dump)
do_packet_dump6 (buf);
if (gconfig.debug_state)
l2tp_log (LOG_DEBUG, "%s: sending ICRQ\n", __FUNCTION__);
control_xmit_ipv6 (buf);
}
else
{ /* jz: sending a OCRQ */
c->state = OCRQ;
if (c->lns)
{
c->lbit = c->lns->lbit ? LBIT : 0;
/* c->ourrws = c->lns->call_rws;
if (c->ourrws > -1) c->ourfbit = FBIT; else c->ourfbit = 0; */
}
else if (c->lac)
{
/* c->ourrws = c->lac->call_rws;
if (c->ourrws > -1) c->ourfbit = FBIT; else c->ourfbit = 0; */
}
if (t->fc & SYNC_FRAMING)
c->frame = SYNC_FRAMING;
else
c->frame = ASYNC_FRAMING;
buf = new_outgoing6 (t);
add_message_type_avp6 (buf, OCRQ);
#ifdef TEST_HIDDEN
add_callid_avp6 (buf, c->ourcid, t);
#else
add_callid_avp6 (buf, c->ourcid);
#endif
add_serno_avp6 (buf, global_serno);
c->serno = global_serno;
global_serno++;
add_minbps_avp6 (buf, DEFAULT_MIN_BPS);
add_maxbps_avp6 (buf, DEFAULT_MAX_BPS);
add_bearer_avp6 (buf, 0);
add_frame_avp6 (buf, c->frame);
add_number_avp6 (buf, c->dial_no);
add_control_hdr6 (t, c, buf);
c->cnu = 0;
if (gconfig.packet_dump)
do_packet_dump6 (buf);
control_xmit_ipv6 (buf);
}
}
break;
case SCCRQ:
/*
* We've received a request, now let's
* formulate a response.
*/
if (t->tid <= 0)
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer did not specify assigned tunnel6 ID. Closing.\n",
__FUNCTION__);
set_error6 (c, VENDOR_ERROR, "Specify your assigned tunnel6 ID");
c->needclose = -1;
return -EINVAL;
}
if (!(t->lns = get_lns6 (t)))
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Denied connection to unauthorized peer %s\n",
__FUNCTION__, IPADDY6 (t->peer.sin6_addr));
set_error6 (c, VENDOR_ERROR, "No Authorization");
c->needclose = -1;
return -EINVAL;
}
t->ourrws = t->lns->tun_rws;
t->hbit = t->lns->hbit;
if (t->fc < 0)
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer did not specify framing capability. Closing.\n",
__FUNCTION__);
set_error6 (c, VENDOR_ERROR, "Specify framing capability");
c->needclose = -1;
return -EINVAL;
}
/* FIXME: Do we need to be sure they specified a version number?
* Theoretically, yes, but we don't have anything in the code
* to actually *do* anything with it, so...why check at this point?
* We shouldn't be requiring a bearer capabilities avp to be present in
* SCCRQ and SCCRP as they aren't required
if (t->bc < 0 ) {
if (DEBUG) l2tp_log(LOG_DEBUG,
"%s: Peer did not specify bearer capability. Closing.\n",__FUNCTION__);
set_error(c, VENDOR_ERROR, "Specify bearer capability");
c->needclose = -1;
return -EINVAL;
} */
if ((!strlen (t->hostname)) && ((t->chal_us.state) || ((t->lns->challenge))))
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer did not specify hostname. Closing.\n",
__FUNCTION__);
set_error6 (c, VENDOR_ERROR, "Specify your hostname");
c->needclose = -1;
return -EINVAL;
}
y = tunnels6.head;
while (y)
{
if ((y->tid == t->tid) &&
(y->peer.sin6_addr.s6_addr16 == t->peer.sin6_addr.s6_addr16) &&
(y != t))
{
/* This can happen if we get a duplicate
StartCCN or if they don't get our ack packet */
/*
* But it is legitimate for two different remote systems
* to use the same tid
*/
l2tp_log (LOG_DEBUG,
"%s: Peer requested tunnel6 %d twice, ignoring second one.\n",
__FUNCTION__, t->tid);
c->needclose = 0;
c->closing = -1;
return 0;
}
y = y->next;
}
t->state = SCCRP;
buf = new_outgoing6 (t);
add_message_type_avp6 (buf, SCCRP);
if (t->hbit)
{
mk_challenge (t->chal_them.vector, VECTOR_SIZE);
add_randvect_avp6 (buf, t->chal_them.vector, VECTOR_SIZE);
}
add_protocol_avp6 (buf);
add_frame_caps_avp6 (buf, t->ourfc);
add_bearer_caps_avp6 (buf, t->ourbc);
add_firmware_avp6 (buf);
if (t->lac && t->lac->hostname && t->lac->hostname[0])
add_hostname_avp6 (buf, t->lac->hostname);
else if (t->lns && t->lns->hostname && t->lns->hostname[0])
add_hostname_avp6 (buf, t->lns->hostname);
else
add_hostname_avp6 (buf, hostname);
add_vendor_avp6 (buf);
add_tunnelid_avp6 (buf, t->ourtid);
if (t->ourrws >= 0)
add_avp_rws6 (buf, t->ourrws);
if (t->chal_us.state)
{
t->chal_us.ss = SCCRP;
handle_challenge6 (t, &t->chal_us);
add_chalresp_avp6 (buf, t->chal_us.response, MD_SIG_SIZE);
}
if (t->lns->challenge)
{
if (t->chal_them.challenge)
free(t->chal_them.challenge);
t->chal_them.challenge = malloc(MD_SIG_SIZE);
if (!(t->chal_them.challenge))
{
l2tp_log (LOG_WARNING, "%s: malloc failed\n", __FUNCTION__);
set_error6 (c, VENDOR_ERROR, "malloc failed");
toss6 (buf);
return -EINVAL;
}
mk_challenge (t->chal_them.challenge, MD_SIG_SIZE);
t->chal_them.chal_len = MD_SIG_SIZE;
t->chal_them.ss = SCCCN;
if (handle_challenge6 (t, &t->chal_them))
{
/* We already know what to expect back */
l2tp_log (LOG_WARNING, "%s: No secret for '%s'\n", __FUNCTION__,
t->hostname);
set_error6 (c, VENDOR_ERROR, "No secret on our side");
toss6 (buf);
return -EINVAL;
};
add_challenge_avp6 (buf, t->chal_them.challenge,
t->chal_them.chal_len);
}
add_control_hdr6 (t, c, buf);
if (gconfig.packet_dump)
do_packet_dump6 (buf);
c->cnu = 0;
if (gconfig.debug_state)
l2tp_log (LOG_DEBUG, "%s: sending SCCRP\n", __FUNCTION__);
sleep(2);
control_xmit_ipv6 (buf);
break;
case SCCRP:
/*
* We have a reply. If everything is okay, send
* a connected message
*/
if (t->fc < 0)
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer did not specify framing capability. Closing.\n",
__FUNCTION__);
set_error6 (c, VENDOR_ERROR, "Specify framing capability");
c->needclose = -1;
return -EINVAL;
}
/* FIXME: Do we need to be sure they specified a version number?
* Theoretically, yes, but we don't have anything in the code
* to actually *do* anything with it, so...why check at this point?
* We shouldn't be requiring a bearer capabilities avp to be present in
* SCCRQ and SCCRP as they aren't required
if (t->bc < 0 ) {
if (DEBUG) log(LOG_DEBUG,
"%s: Peer did not specify bearer capability. Closing.\n",__FUNCTION__);
set_error(c, VENDOR_ERROR, "Specify bearer capability");
c->needclose = -1;
return -EINVAL;
} */
if ((!strlen (t->hostname)) && ((t->chal_them.state) || ((t->chal_us.state))))
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer did not specify hostname. Closing.\n",
__FUNCTION__);
set_error6 (c, VENDOR_ERROR, "Specify your hostname");
c->needclose = -1;
return -EINVAL;
}
if (t->tid <= 0)
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer did not specify assigned tunnel6 ID. Closing.\n",
__FUNCTION__);
set_error6 (c, VENDOR_ERROR, "Specify your assigned tunnel6 ID");
c->needclose = -1;
return -EINVAL;
}
if (t->chal_them.state)
{
t->chal_them.ss = SCCRP;
if (handle_challenge6 (t, &t->chal_them))
{
set_error6 (c, VENDOR_ERROR, "No secret key on our side");
l2tp_log (LOG_WARNING, "%s: No secret key for authenticating '%s'\n",
__FUNCTION__, t->hostname);
c->needclose = -1;
return -EINVAL;
}
if (memcmp
(t->chal_them.reply, t->chal_them.response, MD_SIG_SIZE))
{
set_error6 (c, VENDOR_ERROR,
"Invalid challenge authentication");
l2tp_log (LOG_DEBUG, "%s: Invalid authentication for host '%s'\n",
__FUNCTION__, t->hostname);
c->needclose = -1;
return -EINVAL;
}
}
if (t->chal_us.state)
{
t->chal_us.ss = SCCCN;
if (handle_challenge6 (t, &t->chal_us))
{
l2tp_log (LOG_WARNING, "%s: No secret for authenticating to '%s'\n",
__FUNCTION__, t->hostname);
set_error6 (c, VENDOR_ERROR, "No secret key on our end");
c->needclose = -1;
return -EINVAL;
};
}
t->state = SCCCN;
buf = new_outgoing6 (t);
add_message_type_avp6 (buf, SCCCN);
if (t->hbit)
{
mk_challenge (t->chal_them.vector, VECTOR_SIZE);
add_randvect_avp6 (buf, t->chal_them.vector, VECTOR_SIZE);
}
if (t->chal_us.state)
add_chalresp_avp6 (buf, t->chal_us.response, MD_SIG_SIZE);
add_control_hdr6 (t, c, buf);
if (gconfig.packet_dump)
do_packet_dump6 (buf);
c->cnu = 0;
if (gconfig.debug_state)
l2tp_log (LOG_DEBUG, "%s: sending SCCCN\n", __FUNCTION__);
control_xmit_ipv6 (buf);
/* Schedule a HELLO */
tv.tv_sec = HELLO_DELAY;
tv.tv_usec = 0;
#ifdef DEBUG_HELLO
l2tp_log (LOG_DEBUG, "%s: scheduling initial HELLO on %d\n", __FUNCTION__,
t->ourtid);
#endif
t->hello6 = schedule (tv, hello6, (void *) t);
l2tp_log (LOG_NOTICE,
"Connection established to %s, %d. Local: %d, Remote: %d (ref=%u/%u).\n",
IPADDY6 (t->peer.sin6_addr),
ntohs (t->peer.sin6_port), t->ourtid, t->tid, t->refme, t->refhim);
if (t->lac)
{
/* This is part of a LAC, so we want to go ahead
and start an ICRQ now */
magic_lac_dial6 (t->lac);
}
break;
case SCCCN:
if (t->chal_them.state)
{
if (memcmp
(t->chal_them.reply, t->chal_them.response, MD_SIG_SIZE))
{
set_error6 (c, VENDOR_ERROR,
"Invalid challenge authentication");
l2tp_log (LOG_DEBUG, "%s: Invalid authentication for host '%s'\n",
__FUNCTION__, t->hostname);
c->needclose = -1;
return -EINVAL;
}
}
t->state = SCCCN;
l2tp_log (LOG_NOTICE,
"Connection established to %s, %d. Local: %d, Remote: %d (ref=%u/%u). LNS session is '%s'\n",
IPADDY6 (t->peer.sin6_addr),
ntohs (t->peer.sin6_port), t->ourtid, t->tid, t->refme, t->refhim,
t->lns->entname);
/* Schedule a HELLO */
tv.tv_sec = HELLO_DELAY;
tv.tv_usec = 0;
#ifdef DEBUG_HELLO
l2tp_log (LOG_DEBUG, "%s: scheduling initial HELLO on %d\n", __FUNCTION__,
t->ourtid);
#endif
t->hello6 = schedule (tv, hello6, (void *) t);
break;
case StopCCN:
if (t->qtid < 0)
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer tried to disconnect without specifying tunnel6 ID\n",
__FUNCTION__);
return -EINVAL;
}
/* Work around bug in MSL2TP client */
if ((t->firmware == 0xff00) && (!(strncmp(t->vendor, "Deterministic Networks Inc.", 27))))
tmptid = t->ourtid;
else
tmptid = t->tid;
if ((t->qtid != tmptid) && (tmptid > 0))
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer [Vendor:%s] [Firmware:%d (0x%.4x)] tried to disconnect with invalid TID (%d != %d)\n",
__FUNCTION__, t->vendor, t->firmware, t->firmware, t->qtid, tmptid);
return -EINVAL;
}
/* In case they're disconnecting immediately after SCCN */
if (!t->tid)
t->tid = t->qtid;
if (t->self->result < 0)
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer tried to disconnect without specifying result code.\n",
__FUNCTION__);
return -EINVAL;
}
l2tp_log (LOG_INFO,
"%s: Connection closed to %s, port %d (%s), Local: %d, Remote: %d\n",
__FUNCTION__, IPADDY6 (t->peer.sin6_addr),
ntohs (t->peer.sin6_port), t->self->errormsg, t->ourtid, t->tid);
c->needclose = 0;
c->closing = -1;
break;
case ICRQ:
p = t->call_head;
if (!p->lns)
{
set_error6 (p, ERROR_INVALID, "This tunnel6 cannot accept calls\n");
call_close6 (p);
return -EINVAL;
}
p->lbit = p->lns->lbit ? LBIT : 0;
/* p->ourrws = p->lns->call_rws;
if (p->ourrws > -1) p->ourfbit = FBIT; else p->ourfbit = 0; */
if (p->cid < 0)
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer tried to initiate call without call ID\n",
__FUNCTION__);
/* Here it doesn't make sense to use the needclose flag because
the call p did not receive any packets */
call_close6 (p);
return -EINVAL;
}
z = p->next;
while (z)
{
if (z->cid == p->cid)
{
/* This can happen if we get a duplicate
ICRQ or if they don't get our ack packet */
l2tp_log (LOG_DEBUG,
"%s: Peer requested call %d twice, ignoring second one.\n",
__FUNCTION__, p->cid);
p->needclose = 0;
p->closing = -1;
return 0;
}
z = z->next;
}
p = t->call_head;
/* FIXME: by commenting this out, we're not checking whether the serial
* number avp is included in the ICRQ at all which its required to be.
* Since the serial number is only used for human debugging aid, this
* isn't a big deal, but it would be nice to have *some* sort of check
* for it and perhaps just log it and go on. */
/* JLM if (p->serno<1) {
if (DEBUG) log(LOG_DEBUG,
"%s: Peer did not specify serial number when initiating call\n", __FUNCTION__);
call_close(p);
return -EINVAL;
} */
#ifdef IP_ALLOCATION1 //RY: diabled by adding 1
if (t->lns->assign_ip) {
p->addr = get_addr6 (t->lns->range); //RY: commented for compiling
if (!p->addr)
{
set_error6 (p, ERROR_NORES, "No available IP address");
call_close6 (p);
l2tp_log (LOG_DEBUG, "%s: Out of IP addresses on tunnel6 %d!\n",
__FUNCTION__, t->tid);
return -EINVAL;
}
reserve_addr6 (p->addr);//RY: commented for compilation
}
else
p->addr = 0;
#endif
p->state = ICRP;
buf = new_outgoing6 (t);
add_message_type_avp6 (buf, ICRP);
if (t->hbit)
{
mk_challenge (t->chal_them.vector, VECTOR_SIZE);
add_randvect_avp6 (buf, t->chal_them.vector, VECTOR_SIZE);
}
#ifdef TEST_HIDDEN
add_callid_avp6 (buf, p->ourcid, t);
#else
add_callid_avp6 (buf, p->ourcid);
#endif
/* if (p->ourrws >=0)
add_avp_rws(buf, p->ourrws); */
/*
* FIXME: I should really calculate
* Packet Processing Delay
*/
/* add_ppd_avp(buf,ppd); */
add_control_hdr6 (t, p, buf);
if (gconfig.packet_dump)
do_packet_dump6 (buf);
p->cnu = 0;
if (gconfig.debug_state)
l2tp_log (LOG_DEBUG, "%s: Sending ICRP\n", __FUNCTION__);
control_xmit_ipv6 (buf);
break;
case ICRP:
if (c->cid < 0)
{
if (DEBUG)
l2tp_log (LOG_DEBUG,
"%s: Peer tried to negotiate ICRP without specifying call ID\n",
__FUNCTION__);
c->needclose = -1;
return -EINVAL;
}
c->state = ICCN;
if (t->fc & SYNC_FRAMING)
c->frame = SYNC_FRAMING;
else
c->frame = ASYNC_FRAMING;
buf = new_outgoing6 (t);
add_message_type_avp6 (buf, ICCN);
if (t->hbit)
{
mk_challenge (t->chal_them.vector, VECTOR_SIZE);
add_randvect_avp6 (buf, t->chal_them.vector, VECTOR_SIZE);
}
add_txspeed_avp6 (buf, DEFAULT_TX_BPS);
add_frame_avp6 (buf, c->frame);
/* if (c->ourrws >= 0)
add_avp_rws(buf, c->ourrws); */
/* FIXME: Packet Processing Delay */
/* We don't need any kind of proxy PPP stuff */
/* Can we proxy authenticate ourselves??? */
add_rxspeed_avp6 (buf, DEFAULT_RX_BPS);
/* add_seqreqd_avp (buf); *//* We don't have sequencing code, so
* don't ask for sequencing */
add_control_hdr6 (t, c, buf);
if (gconfig.packet_dump)
do_packet_dump6 (buf);
c->cnu = 0;
if (gconfig.debug_state)
l2tp_log (LOG_DEBUG, "%s: Sending ICCN\n", __FUNCTION__);
l2tp_log (LOG_NOTICE,
"Call established with %s, Local: %d, Remote: %d, Serial: %d (ref=%u/%u)\n",
IPADDY6 (t->peer.sin6_addr), c->ourcid, c->cid,
c->serno, t->refme, t->refhim);
control_xmit_ipv6 (buf);
po = NULL;
po = add_opt (po, "passive");
po = add_opt (po, "-detach");
if (c->lac)
{
if (c->lac->defaultroute)
po = add_opt (po, "defaultroute");
//strncpy (ip1, IPADDY6 (c->lac->localaddr), sizeof (ip1));//RY: commented for testin g
//strncpy (ip2, IPADDY6 (c->lac->remoteaddr), sizeof (ip2));
strncpy (ip1, "192.168.3.2", sizeof ("192.168.3.2"));
strncpy (ip2, "192.168.3.1", sizeof ("192.168.3.1"));
po = add_opt (po, "%s:%s", ip1,ip2);//RY: moved out of IP_ALLOCATION
#ifdef IP_ALLOCATION
//po = add_opt (po, "%s:%s", c->lac->localaddr ? ip1 : "",
// c->lac->remoteaddr ? ip2 : "");
//po = add_opt (po, "%s:%s", ip1,ip2);
#endif
if (c->lac->authself)
{
if (c->lac->pap_refuse)
po = add_opt (po, "refuse-pap");
if (c->lac->chap_refuse)
po = add_opt (po, "refuse-chap");
}
else
{
po = add_opt (po, "refuse-pap");
po = add_opt (po, "refuse-chap");
}
if (c->lac->authpeer)
{
po = add_opt (po, "auth");
if (c->lac->pap_require)
po = add_opt (po, "require-pap");
if (c->lac->chap_require)
po = add_opt (po, "require-chap");
}
if (c->lac->authname[0])
{
po = add_opt (po, "name");
po = add_opt (po, c->lac->authname);
}
if (c->lac->debug)
po = add_opt (po, "debug");
if (c->lac->password[0])
{
if (pipe (pppd_passwdfd) == -1)
{
l2tp_log (LOG_DEBUG,
"%s: Unable to create password pipe for pppd\n", __FUNCTION__);
return -EINVAL;
}
write (pppd_passwdfd[1], c->lac->password, strlen (c->lac->password));
close (pppd_passwdfd[1]);
/* clear memory used for password, paranoid? */
for (i = 0; i < STRLEN; i++)
c->lac->password[i] = '\0';
po = add_opt (po, "plugin");
po = add_opt (po, "passwordfd.so");
po = add_opt (po, "passwordfd");
snprintf (passwdfd_buf, 32, "%d", pppd_passwdfd[0]);
po = add_opt (po, passwdfd_buf);
}
if (c->lac->pppoptfile[0])
{
po = add_opt (po, "file");
po = add_opt (po, c->lac->pppoptfile);
}
};
start_pppd6 (c, po);
opt_destroy (po);
if (c->lac)
c->lac->rtries = 0;
break;
case ICCN:
if (c == t->self)
{
l2tp_log (LOG_DEBUG,
"%s: Peer attempted ICCN on the actual tunnel6, not the call",
__FUNCTION__);
return -EINVAL;
}
if (c->txspeed < 1)
{
l2tp_log (LOG_DEBUG,
"%s: Warning: Peer did not specify transmit speed\n", __FUNCTION__);
/* don't refuse the connection over this
c->needclose = -1;
return -EINVAL;
*/
};
if (c->frame < 1)
{
l2tp_log (LOG_DEBUG,
"%s: Warning: Peer did not specify framing type\n", __FUNCTION__);
/* don't refuse the connection over this
c->needclose = -1;
return -EINVAL;
*/
}
c->state = ICCN;
// strncpy (ip1, IPADDY6 (c->lns->localaddr), sizeof (ip1));
// strncpy (ip2, IPADDY6 (c->addr), sizeof (ip2));
strncpy (ip1, "192.168.3.1", sizeof ("192.168.3.1"));
strncpy (ip2, "192.168.3.2", sizeof ("192.168.3.2"));
po = NULL;
po = add_opt (po, "passive");
po = add_opt (po, "-detach");
//po = add_opt (po, "%s:%s", c->lns->localaddr ? ip1 : "", ip2); //Mohnkhan
po = add_opt (po, "%s:%s", ip1, ip2); //Mohnkhan
if (c->lns->authself)
{
if (c->lns->pap_refuse)
po = add_opt (po, "refuse-pap");
if (c->lns->chap_refuse)
po = add_opt (po, "refuse-chap");
}
else
{
po = add_opt (po, "refuse-pap");
po = add_opt (po, "refuse-chap");
}
if (c->lns->authpeer)
{
po = add_opt (po, "auth");
if (c->lns->pap_require)
po = add_opt (po, "require-pap");
if (c->lns->chap_require)
po = add_opt (po, "require-chap");
if (c->lns->passwdauth)
po = add_opt (po, "login");
}
if (c->lns->authname[0])
{
po = add_opt (po, "name");
po = add_opt (po, c->lns->authname);
}
if (c->lns->debug)
po = add_opt (po, "debug");
if (c->lns->pppoptfile[0])
{
po = add_opt (po, "file");
po = add_opt (po, c->lns->pppoptfile);
}
start_pppd6 (c, po);
opt_destroy (po);
l2tp_log (LOG_NOTICE,
"Call established with %s, Local: %d, Remote: %d, Serial: %d\n",
IPADDY6 (t->peer.sin6_addr), c->ourcid, c->cid,
c->serno);
break;
case OCRP: /* jz: nothing to do for OCRP, waiting for OCCN */
break;
case OCCN: /* jz: get OCCN, so the only thing we must do is to start the pppd */
po = NULL;
po = add_opt (po, "passive");
po = add_opt (po, "-detach");
po = add_opt (po, "file");
strcat (dummy_buf, c->dial_no); /* jz: use /etc/ppp/dialnumber.options for pppd - kick it if you dont like */
strcat (dummy_buf, ".options");
po = add_opt (po, dummy_buf);
if (c->lac)
{
if (c->lac->defaultroute)
po = add_opt (po, "defaultroute");
strncpy (ip1, IPADDY6 (c->lac->localaddr), sizeof (ip1));
strncpy (ip2, IPADDY6 (c->lac->remoteaddr), sizeof (ip2));
po = add_opt (po, "%s:%s", c->lac->localaddr ? ip1 : "",
c->lac->remoteaddr ? ip2 : "");
if (c->lac->authself)
{
if (c->lac->pap_refuse)
po = add_opt (po, "refuse-pap");
if (c->lac->chap_refuse)
po = add_opt (po, "refuse-chap");
}
else
{
po = add_opt (po, "refuse-pap");
po = add_opt (po, "refuse-chap");
}
if (c->lac->authpeer)
{
po = add_opt (po, "auth");
if (c->lac->pap_require)
po = add_opt (po, "require-pap");
if (c->lac->chap_require)
po = add_opt (po, "require-chap");
}
if (c->lac->authname[0])
{
po = add_opt (po, "name");
po = add_opt (po, c->lac->authname);
}
if (c->lac->debug)
po = add_opt (po, "debug");
if (c->lac->pppoptfile[0])
{