// L2TPNS PPP Stuff
-char const *cvs_id_ppp = "$Id: ppp.c,v 1.11 2004/08/02 06:06:28 fred_nerk Exp $";
+char const *cvs_id_ppp = "$Id: ppp.c,v 1.14 2004/09/02 04:18:07 fred_nerk Exp $";
#include <stdio.h>
#include <string.h>
return;
}
if (session[s].ip)
- *p = 2; // ACK
+ *p = 2; // ACK
else
- *p = 3; // cant authorise
+ *p = 3; // cant authorise
p[1] = id;
- *(u16 *) (p + 2) = htons(5); // length
- p[4] = 0; // no message
+ *(u16 *) (p + 2) = htons(5); // length
+ p[4] = 0; // no message
if (session[s].ip)
{
- log(3, session[s].ip, s, t, "%d Already an IP allocated: %s (%d)\n", getpid(), inet_toa(htonl(session[s].ip)), session[s].ip_pool_index);
+ log(3, session[s].ip, s, t, "%d Already an IP allocated: %s (%d)\n", getpid(), inet_toa(htonl(session[s].ip)), session[s].ip_pool_index);
session[s].flags &= ~SF_IPCP_ACKED;
}
else
{
- log(1, 0, s, t, "No radius session available to authenticate session...\n");
+ log(1, 0, s, t, "No radius session available to authenticate session...\n");
}
log(3, 0, s, t, "Fallback response to PAP (%s)\n", (session[s].ip) ? "ACK" : "NAK");
tunnelsend(b, 5 + (p - b), t); // send it
}
else
- { // set up RADIUS request
+ {
+ // set up RADIUS request
u16 r = session[s].radius;
// Run PRE_AUTH plugins
{
case 1: // Maximum-Receive-Unit
if (length == 4)
- log(4, 0, 0, 0, " %s %d\n", lcp_types[type], ntohs(*(u16 *)(o + 2)));
+ log(4, 0, 0, 0, " %s %d\n", lcp_types[type], ntohs(*(u16 *)(o + 2)));
else
log(4, 0, 0, 0, " %s odd length %d\n", lcp_types[type], length);
break;
{
if (length == 4)
{
- int proto = ntohs(*(u16 *)(o + 2));
+ int proto = ntohs(*(u16 *)(o + 2));
log(4, 0, 0, 0, " %s 0x%x (%s)\n", lcp_types[type], proto,
proto == 0xC223 ? "CHAP" :
proto == 0xC023 ? "PAP" : "UNKNOWN");
{
if (length == 6)
{
- u32 magicno = ntohl(*(u32 *)(o + 2));
- log(4, 0, 0, 0, " %s %x\n", lcp_types[type], magicno);
+ u32 magicno = ntohl(*(u32 *)(o + 2));
+ log(4, 0, 0, 0, " %s %x\n", lcp_types[type], magicno);
}
else
log(4, 0, 0, 0, " %s odd length %d\n", lcp_types[type], length);
{
// Send back a ConfigAck
log(3, session[s].ip, s, t, "ConfigReq accepted, sending as Ack\n");
+ // for win2k L2TP clientis and LCP renegotiation of alive session
+ if (magicno || l == 4) initlcp(t, s);
q = makeppp(b, sizeof(b), p, l, t, s, PPPLCP);
- if (!q) {
+ if (!q)
+ {
log(3, session[s].ip, s, t, " failed to create packet.\n");
return;
}
*q = ConfigAck;
tunnelsend(b, l + (q - b), t);
- // For win2k L2TP clients, LCP should be initiated by the LNS
- if (magicno) initlcp(t, s);
}
else
{
}
else if (*p == TerminateReq)
{
- *p = TerminateAck; // close
+ *p = TerminateAck; // close
q = makeppp(b, sizeof(b), p, l, t, s, PPPLCP);
if (!q) {
log(3, session[s].ip, s, t, "Failed to create PPP packet in processlcp.\n");
}
else if (*p == EchoReq)
{
- *p = EchoReply; // reply
+ *p = EchoReply; // reply
*(u32 *) (p + 4) = htonl(session[s].magic); // our magic number
q = makeppp(b, sizeof(b), p, l, t, s, PPPLCP);
if (!q) {
if (!session[s].ip)
{
log(3, 0, s, t, "Waiting on radius reply\n");
- return ; // have to wait on RADIUS reply
+ return; // have to wait on RADIUS reply
}
// form a config reply quoting the IP in the session
{
log(5, session[s].ip, s, t, " DNS2 = %s\n", inet_toa(session[s].dns1));
}
}
- i = findppp(p, 3); // IP address
+ i = findppp(p, 3); // IP address
if (!i || i[1] != 6)
{
log(1, 0, s, t, "No IP in IPCP request\n");
if (session[s].snoop_ip && session[s].snoop_port)
{
- // Snooping this session, send it to ASIO
+ // Snooping this session
snoop_send_packet(p, l, session[s].snoop_ip, session[s].snoop_port);
}
STAT(tun_tx_packets);
}
else
{
- *p = ConfigRej; // reject
+ *p = ConfigRej; // reject
sendccp(t, s);
}
}
else
- *p = TerminateAck; // close
+ *p = TerminateAck; // close
if (!(q = makeppp(b, sizeof(b), p, l, t, s, PPPCCP)))
{
log(1,0,0,0, "Failed to send CCP packet.\n");
return ;
}
log(1, 0, s, t, "Send CHAP challenge\n");
- { // new challenge
+ {
+ // new challenge
int n;
for (n = 0; n < 15; n++)
radius[r].auth[n] = rand();
}
- radius[r].chap = 1; // CHAP not PAP
+ radius[r].chap = 1; // CHAP not PAP
radius[r].id++;
if (radius[r].state != RADIUSCHAP)
radius[r].try = 0;
log(1, 0, s, t, "failed to send CHAP challenge.\n");
return;
}
- *q = 1; // challenhe
- q[1] = radius[r].id; // ID
- q[4] = 16; // length
- memcpy(q + 5, radius[r].auth, 16); // challenge
- strcpy(q + 21, hostname); // our name
+ *q = 1; // challenge
+ q[1] = radius[r].id; // ID
+ q[4] = 16; // length
+ memcpy(q + 5, radius[r].auth, 16); // challenge
+ strcpy(q + 21, hostname); // our name
*(u16 *) (q + 2) = htons(strlen(hostname) + 21); // length
tunnelsend(b, strlen(hostname) + 21 + (q - b), t); // send it
}
// returns start of PPP frame
u8 *makeppp(u8 * b, int size, u8 * p, int l, tunnelidt t, sessionidt s, u16 mtype)
{
-
if (size < 12)
return NULL; // Need more space than this!!
while (l)
{
if (l < b[1] || !b[1])
- return 0; // faulty
+ return 0; // faulty
if (*b == mtype)
return b;
l -= b[1];
log(4, 0, s, t, "Sending LCP ConfigReq for PAP\n");
*q = ConfigReq;
*(u8 *)(q + 1) = (time_now % 255) + 1; // ID
- *(u16 *)(q + 2) = htons(8); // Length
- *(u8 *)(q + 4) = 3;
- *(u8 *)(q + 5) = 4;
- *(u16 *)(q + 6) = htons(0xC023); // PAP
- tunnelsend(b, 12 + 8, t);
+ *(u16 *)(q + 2) = htons(14); // Length
+ *(u8 *)(q + 4) = 5;
+ *(u8 *)(q + 5) = 6;
+ *(u32 *)(q + 6) = htonl(session[s].magic);
+ *(u8 *)(q + 10) = 3;
+ *(u8 *)(q + 11) = 4;
+ *(u16 *)(q + 12) = htons(0xC023); // PAP
+ tunnelsend(b, 12 + 14, t);
}
// Send CCP reply
projects / l2tpns.git / blobdiff