// L2TPNS PPP Stuff
-//#define LAC
-
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
+#include <sys/socket.h>
+#include <linux/rtnetlink.h>
+
#include "l2tpns.h"
#include "constants.h"
#include "plugin.h"
#include "tbf.h"
#include "cluster.h"
-#ifdef LAC
#include "l2tplac.h"
-#endif
+#include "pppoe.h"
extern tunnelt *tunnel;
extern bundlet *bundle;
LOG(3, s, t, "PAP login %s/%s\n", user, pass);
}
-#ifdef LAC
- if (forwardtolns(s, user))
+ if ((!config->disable_lac_func) && lac_conf_forwardtoremotelns(s, user))
{
- LOG(3, s, t, "Forwarding login for %s to other LNS\n", user);
+ // Creating a tunnel/session has been started
return;
}
-#endif
if (session[s].ip || !(r = radiusnew(s)))
{
packet.username = calloc(l + 1, 1);
memcpy(packet.username, p, l);
-#ifdef LAC
- if (forwardtolns(s, packet.username))
+ if ((!config->disable_lac_func) && lac_conf_forwardtoremotelns(s, packet.username))
{
- LOG(3, s, t, "Forwarding login for %s to other LNS\n", packet.username);
-
free(packet.username);
free(packet.password);
+ // Creating a tunnel/session has been started
return;
}
-#endif
run_plugins(PLUGIN_PRE_AUTH, &packet);
if (!packet.continue_auth)
}
}
-static void lcp_restart(sessionidt s)
+void lcp_restart(sessionidt s)
{
session[s].ppp.phase = Establish;
// This-Layer-Down
if (session[s].die) // going down...
return;
- LOG((*p == EchoReq || *p == EchoReply) ? 4 : 3, s, t,
+ LOG(((*p == EchoReq || *p == EchoReply) ? 4 : 3), s, t,
"LCP: recv %s\n", ppp_code(*p));
if (config->debug > 3) dumplcp(p, l);
static bundleidt new_bundle()
{
- bundleidt i;
- for (i = 1; i < MAXBUNDLE; i++)
- {
- if (bundle[i].state == BUNDLEFREE)
- {
- LOG(4, 0, 0, "MPPP: Assigning bundle ID %d\n", i);
- bundle[i].num_of_links = 1;
- bundle[i].last_check = time_now; // Initialize last_check value
- bundle[i].state = BUNDLEOPEN;
- bundle[i].current_ses = -1; // This is to enforce the first session 0 to be used at first
+ bundleidt i;
+ for (i = 1; i < MAXBUNDLE; i++)
+ {
+ if (bundle[i].state == BUNDLEFREE)
+ {
+ LOG(4, 0, 0, "MPPP: Assigning bundle ID %d\n", i);
+ bundle[i].num_of_links = 1;
+ bundle[i].last_check = time_now; // Initialize last_check value
+ bundle[i].state = BUNDLEOPEN;
+ bundle[i].current_ses = -1; // This is to enforce the first session 0 to be used at first
memset(&frag[i], 0, sizeof(fragmentationt));
- if (i > config->cluster_highest_bundleid)
- config->cluster_highest_bundleid = i;
- return i;
- }
- }
- LOG(0, 0, 0, "MPPP: Can't find a free bundle! There shouldn't be this many in use!\n");
- return 0;
+ if (i > config->cluster_highest_bundleid)
+ config->cluster_highest_bundleid = i;
+ return i;
+ }
+ }
+ LOG(0, 0, 0, "MPPP: Can't find a free bundle! There shouldn't be this many in use!\n");
+ return 0;
}
static void ipcp_open(sessionidt s, tunnelidt t)
if (!session[s].bundle || bundle[session[s].bundle].num_of_links < 2) // FIXME:
{
// no spoof (do sessionbyip to handled statically routed subnets)
- if (ip != session[s].ip && sessionbyip(htonl(ip)) != s)
+ if (!config->disable_no_spoof && ip != session[s].ip && sessionbyip(htonl(ip)) != s)
{
LOG(4, s, t, "Dropping packet with spoofed IP %s\n", fmtaddr(htonl(ip), 0));
return;
{
// There have a long break of the link !!!!!!!!
// M_offset is bigger that the fragmentation buffer size
- LOG(3, s, t, "MPPP: M_offset out of range, min:%d, begin_seq:%d, jitteravg:%d\n", Mmin, this_fragmentation->start_seq, sess_local[s].jitteravg);
+ LOG(3, s, t, "MPPP: M_offset out of range, min:%d, begin_seq:%d\n", Mmin, this_fragmentation->start_seq);
// Calculate the new start index, the previous frag are lost
begin_index = (M_offset + this_fragmentation->start_index) & MAXFRAGNUM_MASK;
if (frag_offset < 0)
{
// this packet comes before the next
- LOG(3, s, t, "MPPP: packet comes before the next, seq:%d, begin_seq:%d, size frag:%d\n", seq_num, this_fragmentation->start_seq, l);
+ LOG(3, s, t, "MPPP: (COMES BEFORE) the next, seq:%d, begin_seq:%d, size_frag:%d, flags:%02X is LOST\n", seq_num, this_fragmentation->start_seq, l, flags);
return;
}
if (frag_offset >= MAXFRAGNUM)
{
// frag_offset is bigger that the fragmentation buffer size
- LOG(3, s, t, "MPPP: Index out of range, seq:%d, begin_seq:%d, jitteravg:%d\n", seq_num, this_fragmentation->start_seq, sess_local[s].jitteravg);
+ LOG(3, s, t, "MPPP: Index out of range, seq:%d, begin_seq:%d\n", seq_num, this_fragmentation->start_seq);
return;
}
if (this_frag->length > 0)
// This fragment is lost, It was around the buffer and it was never completed the packet.
- LOG(3, this_frag->sid, this_frag->tid, "MPPP: (INSERT) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
- this_frag->seq, frag_index, this_frag->flags, this_frag->jitteravg);
+ LOG(3, this_frag->sid, this_frag->tid, "MPPP: (INSERT) seq_num:%d frag_index:%d flags:%02X is LOST\n",
+ this_frag->seq, frag_index, this_frag->flags);
this_frag->length = l;
this_frag->sid = s;
{
// This fragment is lost, It was around the buffer and it was never completed the packet.
LOG(3, this_fragmentation->fragment[frag_index_next].sid, this_fragmentation->fragment[frag_index_next].tid,
- "MPPP: (NEXT) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
+ "MPPP: (NEXT) seq_num:%d frag_index:%d flags:%02X is LOST\n",
this_fragmentation->fragment[frag_index_next].seq, frag_index_next,
- this_fragmentation->fragment[frag_index_next].flags, this_fragmentation->fragment[frag_index_next].jitteravg);
+ this_fragmentation->fragment[frag_index_next].flags);
// this frag is lost
this_fragmentation->fragment[frag_index_next].length = 0;
this_fragmentation->fragment[frag_index_next].flags = 0;
{
// This fragment is lost, It was around the buffer and it was never completed the packet.
LOG(3, this_fragmentation->fragment[frag_index_prev].sid, this_fragmentation->fragment[frag_index_prev].tid,
- "MPPP: (PREV) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
+ "MPPP: (PREV) seq_num:%d frag_index:%d flags:%02X is LOST\n",
this_fragmentation->fragment[frag_index_prev].seq, frag_index_prev,
- this_fragmentation->fragment[frag_index_prev].flags, this_fragmentation->fragment[frag_index_prev].jitteravg);
+ this_fragmentation->fragment[frag_index_prev].flags);
this_fragmentation->fragment[frag_index_prev].length = 0;
this_fragmentation->fragment[frag_index_prev].flags = 0;
{
// This fragment is lost, it was never completed the packet.
LOG(3, this_fragmentation->fragment[end_index].sid, this_fragmentation->fragment[end_index].tid,
- "MPPP: (FIND END) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
+ "MPPP: (FIND END) seq_num:%d frag_index:%d flags:%02X is LOST\n",
this_fragmentation->fragment[end_index].seq, begin_index,
- this_fragmentation->fragment[end_index].flags, this_fragmentation->fragment[end_index].jitteravg);
+ this_fragmentation->fragment[end_index].flags);
// this frag is lost
this_fragmentation->fragment[end_index].length = 0;
this_fragmentation->fragment[end_index].flags = 0;
{
// This fragment is lost, it was never completed the packet.
LOG(3, this_fragmentation->fragment[begin_index].sid, this_fragmentation->fragment[begin_index].tid,
- "MPPP: (FIND BEGIN) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
+ "MPPP: (FIND BEGIN) seq_num:%d frag_index:%d flags:%02X is LOST\n",
this_fragmentation->fragment[begin_index].seq, begin_index,
- this_fragmentation->fragment[begin_index].flags, this_fragmentation->fragment[begin_index].jitteravg);
+ this_fragmentation->fragment[begin_index].flags);
// this frag is lost
this_fragmentation->fragment[begin_index].length = 0;
this_fragmentation->fragment[begin_index].flags = 0;
{
if (!(this_fragmentation->fragment[begin_index].flags & MP_BEGIN))
{
+ LOG(3, this_fragmentation->fragment[begin_index].sid, this_fragmentation->fragment[begin_index].tid,
+ "MPPP: (NOT BEGIN) seq_num:%d frag_index:%d flags:%02X\n",
+ this_fragmentation->fragment[begin_index].seq, begin_index,
+ this_fragmentation->fragment[begin_index].flags);
// should occur only after an "M_Offset out of range"
// The start sequence must be a begin sequence
this_fragmentation->start_index = (begin_index +1) & MAXFRAGNUM_MASK;
(this_fragmentation->fragment[begin_index].seq != this_fragmentation->start_seq))
{
LOG(3, this_fragmentation->fragment[begin_index].sid, this_fragmentation->fragment[begin_index].tid,
- "MPPP: (START) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
+ "MPPP: (START) seq_num:%d frag_index:%d flags:%02X is LOST\n",
this_fragmentation->fragment[begin_index].seq, begin_index,
- this_fragmentation->fragment[begin_index].flags, this_fragmentation->fragment[begin_index].jitteravg);
+ this_fragmentation->fragment[begin_index].flags);
this_fragmentation->fragment[begin_index].length = 0;
this_fragmentation->fragment[begin_index].flags = 0;
}
return;
// no spoof
- if (ipv4 != session[s].ip && memcmp(&config->ipv6_prefix, &ip, 8) && sessionbyipv6(ip) != s)
+ if ((ipv4 != session[s].ip || memcmp(&config->ipv6_prefix, &ip, 8)) && sessionbyipv6(ip) != s)
{
char str[INET6_ADDRSTRLEN];
LOG(5, s, t, "Dropping packet with spoofed IP %s\n",
q[1] = radius[r].id; // ID
q[4] = 16; // value size (size of challenge)
memcpy(q + 5, radius[r].auth, 16); // challenge
- strcpy((char *) q + 21, hostname); // our name
- *(uint16_t *) (q + 2) = htons(strlen(hostname) + 21); // length
- tunnelsend(b, strlen(hostname) + 21 + (q - b), t); // send it
+ strcpy((char *) q + 21, config->multi_n_hostname[tunnel[t].indexudp][0]?config->multi_n_hostname[tunnel[t].indexudp]:hostname); // our name
+ *(uint16_t *) (q + 2) = htons(strlen(config->multi_n_hostname[tunnel[t].indexudp][0]?config->multi_n_hostname[tunnel[t].indexudp]:hostname) + 21); // length
+ tunnelsend(b, strlen(config->multi_n_hostname[tunnel[t].indexudp][0]?config->multi_n_hostname[tunnel[t].indexudp]:hostname) + 21 + (q - b), t); // send it
}
// fill in a L2TP message with a PPP frame,
uint16_t type = mtype;
uint8_t *start = b;
+ if (t == TUNNEL_ID_PPPOE)
+ {
+ return pppoe_makeppp(b, size, p, l, s, t, mtype, prio, bid, mp_bits);
+ }
+
if (size < 16) // Need more space than this!!
{
LOG(0, s, t, "makeppp buffer too small for L2TP header (size=%d)\n", size);
return b;
}
+// fill in a L2TP message with a PPP frame,
+// returns start of PPP frame
+//(note: THIS ROUTINE CAN WRITES TO p[-28]).
+uint8_t *opt_makeppp(uint8_t *p, int l, sessionidt s, tunnelidt t, uint16_t mtype, uint8_t prio, bundleidt bid, uint8_t mp_bits)
+{
+ uint16_t hdr = 0x0002; // L2TP with no options
+ uint16_t type = mtype;
+ uint8_t *b = p;
+
+ if (t == TUNNEL_ID_PPPOE)
+ {
+ return opt_pppoe_makeppp(p, l, s, t, mtype, prio, bid, mp_bits);
+ }
+
+ // Check whether this session is part of multilink
+ if (bid)
+ {
+ if (bundle[bid].num_of_links > 1)
+ type = PPPMP; // Change PPP message type to the PPPMP
+ else
+ bid = 0;
+ }
+
+ if (bid)
+ {
+ // Add the message type if this fragment has the begin bit set
+ if (mp_bits & MP_BEGIN)
+ {
+ b -= 2;
+ *(uint16_t *) b = htons(mtype); // Message type
+ }
+
+ // Set the sequence number and (B)egin (E)nd flags
+ if (session[s].mssf)
+ {
+ // Set the multilink bits
+ uint16_t bits_send = mp_bits;
+ b -= 2;
+ *(uint16_t *) b = htons((bundle[bid].seq_num_t & 0x0FFF)|bits_send);
+ }
+ else
+ {
+ b -= 4;
+ *(uint32_t *) b = htonl(bundle[bid].seq_num_t);
+ // Set the multilink bits
+ *b = mp_bits;
+ }
+
+ bundle[bid].seq_num_t++;
+ }
+
+ if (type < 0x100 && session[s].flags & SESSION_PFC)
+ {
+ b--;
+ *b = type;
+ }
+ else
+ {
+ b -= 2;
+ *(uint16_t *) b = htons(type);
+ }
+
+ if (type == PPPLCP || !(session[s].flags & SESSION_ACFC))
+ {
+ b -= 2;
+ *(uint16_t *) b = htons(0xFF03); // HDLC header
+ }
+
+ if (prio) hdr |= 0x0100; // set priority bit
+ b -= 2;
+ *(uint16_t *) b = htons(session[s].far); // session
+ b -= 2;
+ *(uint16_t *) b = htons(tunnel[t].far); // tunnel
+ b -= 2;
+ *(uint16_t *) b = htons(hdr);
+
+ return b;
+}
+
static int add_lcp_auth(uint8_t *b, int size, int authtype)
{
int len = 0;
projects / l2tpns.git / blobdiff