Add PPPOE-SERVER functionality

[l2tpns.git] / l2tplac.c

diff --git a/l2tplac.c b/l2tplac.c
index 4c71d6c..6ad4683 100644 (file)
--- a/l2tplac.c
+++ b/l2tplac.c
@@ -1,15 +1,20 @@
 /*
+ * Fernando ALVES 2013
  * Add functionality "LAC" to l2tpns.
  * Used to forward a ppp session to another "LNS".
+ * GPL licenced
  */
+
 #include <errno.h>
 #include <string.h>
 
 #include "md5.h"
 #include "l2tpns.h"
 #include "util.h"
+#include "cluster.h"
 
 #include "l2tplac.h"
+#include "pppoe.h"
 
 /* sequence diagram: Client <--> LAC <--> LNS1 <--> LNS2
  *
@@ -227,6 +232,8 @@ void lac_save_rad_tag_tunnels(sessionidt s)
                        LOG(1, s, session[s].tunnel, "Error, Bad IP tunnel server endpoint \n");
                else if (strlen(ptunnelrlns[idtag].tunnel_assignment_id) <= 0)
                        LOG(1, s, session[s].tunnel, "Error, No tunnel_assignment_id \n");
+               else if (ptunnelrlns[idtag].tunnel_server_endpoint == ntohl(config->bind_address))
+                       LOG(0, s, session[s].tunnel, "Error, IP Remote LNS == IP local bind address (%s) !!!\n", fmtaddr(config->bind_address, 0));
                else
                {
                        for (idrlns = 1; idrlns < MAXRLNSTUNNEL; ++idrlns)
@@ -234,7 +241,7 @@ void lac_save_rad_tag_tunnels(sessionidt s)
                                if (pconfigrlns[idrlns].state == CONFRLNSFREE)
                                {
                                        pconfigrlns[idrlns].ip = ptunnelrlns[idtag].tunnel_server_endpoint;
-                                       pconfigrlns[idrlns].port = L2TPPORT; //Default L2TP poart
+                                       pconfigrlns[idrlns].port = L2TPPORT; //Default L2TP port
                                        strcpy(pconfigrlns[idrlns].l2tp_secret, ptunnelrlns[idtag].tunnel_password);
                                        strcpy(pconfigrlns[idrlns].tunnel_assignment_id, ptunnelrlns[idtag].tunnel_assignment_id);
 
@@ -442,7 +449,7 @@ void lac_calc_rlns_auth(tunnelidt t, uint8_t id, uint8_t *out)
 }
 
 // Forward session to LAC or Remote LNS
-int lac_session_forward(uint8_t *buf, int len, sessionidt sess, uint16_t proto)
+int lac_session_forward(uint8_t *buf, int len, sessionidt sess, uint16_t proto, in_addr_t s_addr, int sin_port)
 {
        uint16_t t = 0, s = 0;
        uint8_t *p = buf + 2; // First word L2TP options
@@ -463,10 +470,29 @@ int lac_session_forward(uint8_t *buf, int len, sessionidt sess, uint16_t proto)
 
        if ((!tunnel[t].isremotelns) && (!tunnel[session[sess].tunnel].isremotelns))
        {
-               LOG(0, sess, session[sess].tunnel, "Link Tunnel Session (%u) broken\n", s);
+               LOG(0, sess, session[sess].tunnel, "Link Tunnel Session (%u/%u) broken\n", s, t);
                return 0;
        }
 
+       if (!config->cluster_iam_master)
+       {
+               if ( (proto == PPPIPCP) || (proto == PPPLCP) ||
+                        (proto == PPPPAP) || (proto == PPPCHAP) ||
+                        (proto == PPPIPV6CP && config->ipv6_prefix.s6_addr[0]) ||
+                        (proto == PPPCCP) )
+               {
+                       session[sess].last_packet = time_now;
+                       master_forward_packet(buf, len, s_addr, sin_port);
+                       return 1;
+               }
+       }
+
+       if (t == TUNNEL_ID_PPPOE)
+       {
+               pppoe_forwardto_session_pppoe(buf, len, sess, proto);
+               return 1;
+       }
+
        if (*buf & 0x40)
        {       // length
                p += 2;