Merge from Master

[l2tpns.git] / ppp.c

diff --git a/ppp.c b/ppp.c
index 7251e94..c4f9ab4 100644 (file)
--- a/ppp.c
+++ b/ppp.c
@@ -5,6 +5,10 @@
 #include <unistd.h>
 #include <errno.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <errno.h>
 #include <stdlib.h>

+#include <linux/rtnetlink.h>
+#include <netinet/ip6.h>
+
+#include "dhcp6.h"

 #include "l2tpns.h"
 #include "constants.h"
 #include "plugin.h"
 #include "l2tpns.h"
 #include "constants.h"
 #include "plugin.h"


@@ -12,6 +16,9 @@
 #include "tbf.h"
 #include "cluster.h"
 
 #include "tbf.h"
 #include "cluster.h"
 

+#include "l2tplac.h"
+#include "pppoe.h"
+

 extern tunnelt *tunnel;
 extern bundlet *bundle;
 extern fragmentationt *frag;
 extern tunnelt *tunnel;
 extern bundlet *bundle;
 extern fragmentationt *frag;


@@ -100,6 +107,12 @@ void processpap(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
                LOG(3, s, t, "PAP login %s/%s\n", user, pass);
        }
 
                LOG(3, s, t, "PAP login %s/%s\n", user, pass);
        }
 

+       if ((!config->disable_lac_func) && lac_conf_forwardtoremotelns(s, user))
+       {
+               // Creating a tunnel/session has been started
+               return;
+       }
+

        if (session[s].ip || !(r = radiusnew(s)))
        {
                // respond now, either no RADIUS available or already authenticated
        if (session[s].ip || !(r = radiusnew(s)))
        {
                // respond now, either no RADIUS available or already authenticated


@@ -251,6 +264,14 @@ void processchap(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
                packet.username = calloc(l + 1, 1);
                memcpy(packet.username, p, l);
 
                packet.username = calloc(l + 1, 1);
                memcpy(packet.username, p, l);
 

+               if ((!config->disable_lac_func) && lac_conf_forwardtoremotelns(s, packet.username))
+               {
+                       free(packet.username);
+                       free(packet.password);
+                       // Creating a tunnel/session has been started
+                       return;
+               }
+

                run_plugins(PLUGIN_PRE_AUTH, &packet);
                if (!packet.continue_auth)
                {
                run_plugins(PLUGIN_PRE_AUTH, &packet);
                if (!packet.continue_auth)
                {


@@ -403,7 +424,7 @@ void lcp_open(sessionidt s, tunnelidt t)
        }
 }
 
        }
 }
 

-static void lcp_restart(sessionidt s)
+void lcp_restart(sessionidt s)

 {
        session[s].ppp.phase = Establish;
        // This-Layer-Down
 {
        session[s].ppp.phase = Establish;
        // This-Layer-Down


@@ -536,7 +557,7 @@ void processlcp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
        if (session[s].die) // going down...
                return;
 
        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);
                "LCP: recv %s\n", ppp_code(*p));
 
        if (config->debug > 3) dumplcp(p, l);


@@ -1181,24 +1202,24 @@ static void setepdis(epdist *ep1, epdist ep2)
 
 static bundleidt new_bundle()
 {
 
 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));
                        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)
 }
 
 static void ipcp_open(sessionidt s, tunnelidt t)


@@ -1460,11 +1481,21 @@ void processipcp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
 
 static void ipv6cp_open(sessionidt s, tunnelidt t)
 {
 
 static void ipv6cp_open(sessionidt s, tunnelidt t)
 {

+       int i;

        LOG(3, s, t, "IPV6CP: Opened\n");
 
        change_state(s, ipv6cp, Opened);
        LOG(3, s, t, "IPV6CP: Opened\n");
 
        change_state(s, ipv6cp, Opened);

-       if (session[s].ipv6prefixlen)
-               route6set(s, session[s].ipv6route, session[s].ipv6prefixlen, 1);
+       for (i = 0; i < MAXROUTE6 && session[s].route6[i].ipv6prefixlen; i++)
+       {
+               route6set(s, session[s].route6[i].ipv6route, session[s].route6[i].ipv6prefixlen, 1);
+       }
+
+       if (session[s].ipv6address.s6_addr[0])
+       {
+               // Check if included in prefix
+               if (sessionbyipv6(session[s].ipv6address) != s)
+                       route6set(s, session[s].ipv6address, 128, 1);
+       }

 
        // Send an initial RA (TODO: Should we send these regularly?)
        send_ipv6_ra(s, t, NULL);
 
        // Send an initial RA (TODO: Should we send these regularly?)
        send_ipv6_ra(s, t, NULL);


@@ -1551,8 +1582,16 @@ void processipv6cp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
                                gotip++; // seen address
                                if (o[1] != 10) return;
 
                                gotip++; // seen address
                                if (o[1] != 10) return;
 

-                               ident[0] = htonl(session[s].ip);
-                               ident[1] = 0;
+                               if (session[s].ipv6address.s6_addr[0])
+                               {
+                                       // LSB 64bits of assigned IPv6 address to user (see radius attribut Framed-IPv6-Address)
+                                       memcpy(&ident[0], &session[s].ipv6address.s6_addr[8], 8);
+                               }
+                               else
+                               {
+                                       ident[0] = htonl(session[s].ip);
+                                       ident[1] = 0;
+                               }

 
                                if (memcmp(o + 2, ident, sizeof(ident)))
                                {
 
                                if (memcmp(o + 2, ident, sizeof(ident)))
                                {


@@ -1718,7 +1757,7 @@ static void update_sessions_in_stat(sessionidt s, uint16_t l)
 // (i.e. this routine writes to p[-4]).
 void processipin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
 {
 // (i.e. this routine writes to p[-4]).
 void processipin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
 {

-       in_addr_t ip;
+       in_addr_t ip, ip_dst;

 
        CSTAT(processipin);
 
 
        CSTAT(processipin);
 


@@ -1732,6 +1771,7 @@ void processipin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
        }
 
        ip = ntohl(*(uint32_t *)(p + 12));
        }
 
        ip = ntohl(*(uint32_t *)(p + 12));

+       ip_dst = *(uint32_t *)(p + 16);

 
        if (l > MAXETHER)
        {
 
        if (l > MAXETHER)
        {


@@ -1746,7 +1786,7 @@ void processipin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
        if (!session[s].bundle || bundle[session[s].bundle].num_of_links < 2) // FIXME: 
        {
                // no spoof (do sessionbyip to handled statically routed subnets)
        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;
                {
                        LOG(4, s, t, "Dropping packet with spoofed IP %s\n", fmtaddr(htonl(ip), 0));
                        return;


@@ -1772,12 +1812,15 @@ void processipin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
 
        if (session[s].tbf_in)
        {
 
        if (session[s].tbf_in)
        {

-               // Are we throttling this session?
-               if (config->cluster_iam_master)
-                       tbf_queue_packet(session[s].tbf_in, p, l);
-               else
-                       master_throttle_packet(session[s].tbf_in, p, l);
-               return;
+               if (!config->no_throttle_local_IP || !sessionbyip(ip_dst))
+               {
+                       // Are we throttling this session?
+                       if (config->cluster_iam_master)
+                               tbf_queue_packet(session[s].tbf_in, p, l);
+                       else
+                               master_throttle_packet(session[s].tbf_in, p, l);
+                       return;
+               }

        }
 
        // send to ethernet
        }
 
        // send to ethernet


@@ -1879,9 +1922,12 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
 
        // calculate the jitter average
        uint32_t ljitter = time_now_ms - sess_local[s].prev_time;
 
        // calculate the jitter average
        uint32_t ljitter = time_now_ms - sess_local[s].prev_time;

-       sess_local[s].jitteravg = (sess_local[s].jitteravg + ljitter)>>1;
-       sess_local[s].prev_time = time_now_ms;
-       
+       if (ljitter > 0)
+       {
+               sess_local[s].jitteravg = (sess_local[s].jitteravg + ljitter)>>1;
+               sess_local[s].prev_time = time_now_ms;
+       }
+

        uint32_t Mmin;
 
        if (seq_num < this_fragmentation->M)
        uint32_t Mmin;
 
        if (seq_num < this_fragmentation->M)


@@ -1908,7 +1954,7 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
        {
                // There have a long break of the link !!!!!!!!
                // M_offset is bigger that the fragmentation buffer size
        {
                // 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;
 
                // Calculate the new start index, the previous frag are lost
                begin_index = (M_offset + this_fragmentation->start_index) & MAXFRAGNUM_MASK;


@@ -1925,7 +1971,7 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
        if (frag_offset < 0)
        {
                // this packet comes before the next
        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;
        }
 
                return;
        }
 


@@ -1933,7 +1979,7 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
        if (frag_offset >= MAXFRAGNUM)
        {
                // frag_offset is bigger that the fragmentation buffer size
        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;
        }
 
                return;
        }
 


@@ -1945,8 +1991,8 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
 
        if (this_frag->length > 0)
                // This fragment is lost, It was around the buffer and it was never completed the packet.
 
        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_frag->length = l;
        this_frag->sid = s;


@@ -1975,9 +2021,9 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
                {
                        // 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,
                {
                        // 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].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 frag is lost
                        this_fragmentation->fragment[frag_index_next].length = 0;
                        this_fragmentation->fragment[frag_index_next].flags = 0;


@@ -1994,9 +2040,9 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
                {
                        // 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,
                {
                        // 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].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_fragmentation->fragment[frag_index_prev].length = 0;
                        this_fragmentation->fragment[frag_index_prev].flags = 0;


@@ -2040,9 +2086,9 @@ find_frame:
                                                        {
                                                                // This fragment is lost, it was never completed the packet.
                                                                LOG(3, this_fragmentation->fragment[end_index].sid, this_fragmentation->fragment[end_index].tid,
                                                        {
                                                                // 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].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 frag is lost
                                                                this_fragmentation->fragment[end_index].length = 0;
                                                                this_fragmentation->fragment[end_index].flags = 0;


@@ -2071,9 +2117,9 @@ find_frame:
                        {
                                // This fragment is lost, it was never completed the packet.
                                LOG(3, this_fragmentation->fragment[begin_index].sid, this_fragmentation->fragment[begin_index].tid,
                        {
                                // 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].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;
                                // this frag is lost
                                this_fragmentation->fragment[begin_index].length = 0;
                                this_fragmentation->fragment[begin_index].flags = 0;


@@ -2084,13 +2130,17 @@ find_frame:
        }
 
 assembling_frame:
        }
 
 assembling_frame:

-       // try to assemble the frame that has the received fragment as a member         
+       // try to assemble the frame that has the received fragment as a member

        // get the beginning of this frame
        begin_index = end_index = this_fragmentation->start_index;
        if (this_fragmentation->fragment[begin_index].length)
        {
                if (!(this_fragmentation->fragment[begin_index].flags & MP_BEGIN))
                {
        // get the beginning of this frame
        begin_index = end_index = this_fragmentation->start_index;
        if (this_fragmentation->fragment[begin_index].length)
        {
                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;
                        // 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;


@@ -2169,9 +2219,9 @@ assembling_frame:
                (this_fragmentation->fragment[begin_index].seq != this_fragmentation->start_seq))
        {
                LOG(3, this_fragmentation->fragment[begin_index].sid, this_fragmentation->fragment[begin_index].tid,
                (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].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;
        }
                        this_fragmentation->fragment[begin_index].length = 0;
                        this_fragmentation->fragment[begin_index].flags = 0;
        }


@@ -2214,7 +2264,18 @@ void processipv6in(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
                return;
 
        // no spoof
                return;
 
        // no spoof

-       if (ipv4 != session[s].ip && memcmp(&config->ipv6_prefix, &ip, 8) && sessionbyipv6(ip) != s)
+       if (session[s].ipv6address.s6_addr[0])
+       {
+               if ((sessionbyipv6new(ip) != s) &&
+                       (ip.s6_addr[0] != 0xFE || ip.s6_addr[1] != 0x80 || ip.s6_addr16[1] != 0 || ip.s6_addr16[2] != 0 || ip.s6_addr16[3] != 0))
+               {
+                       char str[INET6_ADDRSTRLEN];
+                       LOG(5, s, t, "Dropping packet with spoofed IP %s\n",
+                                       inet_ntop(AF_INET6, &ip, str, INET6_ADDRSTRLEN));
+                       return;
+               }
+       }
+       else 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",
        {
                char str[INET6_ADDRSTRLEN];
                LOG(5, s, t, "Dropping packet with spoofed IP %s\n",


@@ -2232,6 +2293,16 @@ void processipv6in(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
                return;
        }
 
                return;
        }
 

+       // Check if DhcpV6, IP dst: FF02::1:2, Src Port 0x0222 (546), Dst Port 0x0223 (547)
+       if (*(p + 6) == 17 && *(p + 24) == 0xFF && *(p + 25) == 2 &&
+                       *(uint32_t *)(p + 26) == 0 && *(uint32_t *)(p + 30) == 0 &&
+                       *(uint16_t *)(p + 34) == 0 && *(p + 36) == 0 && *(p + 37) == 1 && *(p + 38) == 0 && *(p + 39) == 2 &&
+                       *(p + 40) == 2 && *(p + 41) == 0x22 && *(p + 42) == 2 && *(p + 43) == 0x23)
+       {
+               dhcpv6_process(s, t, p, l);
+               return;
+       }
+

        // Add on the tun header
        p -= 4;
        *(uint32_t *) p = htonl(PKTIPV6);
        // Add on the tun header
        p -= 4;
        *(uint32_t *) p = htonl(PKTIPV6);


@@ -2483,9 +2554,9 @@ void sendchap(sessionidt s, tunnelidt t)
        q[1] = radius[r].id;                    // ID
        q[4] = 16;                              // value size (size of challenge)
        memcpy(q + 5, radius[r].auth, 16);      // challenge
        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,
 }
 
 // fill in a L2TP message with a PPP frame,


@@ -2496,6 +2567,11 @@ uint8_t *makeppp(uint8_t *b, int size, uint8_t *p, int l, sessionidt s, tunnelid
        uint16_t type = mtype;
        uint8_t *start = b;
 
        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);
        if (size < 16) // Need more space than this!!
        {
                LOG(0, s, t, "makeppp buffer too small for L2TP header (size=%d)\n", size);


@@ -2576,6 +2652,85 @@ uint8_t *makeppp(uint8_t *b, int size, uint8_t *p, int l, sessionidt s, tunnelid
        return b;
 }
 
        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;
 static int add_lcp_auth(uint8_t *b, int size, int authtype)
 {
        int len = 0;