Allow LCP re-negotiation after connection completes

[l2tpns.git] / ppp.c

diff --git a/ppp.c b/ppp.c
index 222cdbd..a169512 100644 (file)
--- a/ppp.c
+++ b/ppp.c
@@ -1,6 +1,6 @@
 // L2TPNS PPP Stuff
 
-char const *cvs_id_ppp = "$Id: ppp.c,v 1.25 2004-11-09 05:49:08 bodea Exp $";
+char const *cvs_id_ppp = "$Id: ppp.c,v 1.27 2004-11-18 13:15:28 bodea Exp $";
 
 #include <stdio.h>
 #include <string.h>
@@ -23,7 +23,7 @@ extern u32 eth_tx;
 extern time_t time_now;
 extern struct configt *config;
 
-void sendccp(tunnelidt t, sessionidt s);
+static void sendccp(tunnelidt t, sessionidt s);
 
 // Process PAP messages
 void processpap(tunnelidt t, sessionidt s, u8 *p, u16 l)
@@ -224,7 +224,7 @@ void processchap(tunnelidt t, sessionidt s, u8 *p, u16 l)
        radiussend(r, RADIUSAUTH);
 }
 
-char *ppp_lcp_types[] = {
+static char *ppp_lcp_types[] = {
        NULL,
        "ConfigReq",
        "ConfigAck",
@@ -240,7 +240,7 @@ char *ppp_lcp_types[] = {
        "IdentRequest",
 };
 
-void dumplcp(u8 *p, int l)
+static void dumplcp(u8 *p, int l)
 {
        int x = l - 4;
        u8 *o = (p + 4);
@@ -543,6 +543,26 @@ void processlcp(tunnelidt t, sessionidt s, u8 *p, u16 l)
        }
 }
 
+// find a PPP option, returns point to option, or 0 if not found
+static u8 *findppp(u8 *b, u8 mtype)
+{
+       u16 l = ntohs(*(u16 *) (b + 2));
+       if (l < 4)
+               return 0;
+       b += 4;
+       l -= 4;
+       while (l)
+       {
+               if (l < b[1] || !b[1])
+                       return 0;               // faulty
+               if (*b == mtype)
+                       return b;
+               l -= b[1];
+               b += b[1];
+       }
+       return 0;
+}
+
 // Process IPCP messages
 void processipcp(tunnelidt t, sessionidt s, u8 *p, u16 l)
 {
@@ -580,6 +600,10 @@ void processipcp(tunnelidt t, sessionidt s, u8 *p, u16 l)
                session[s].flags |= SF_IPCP_ACKED;
 
                LOG(3, session[s].ip, s, t, "IPCP Acked, session is now active\n");
+
+               // clear  LCP_ACKED flag  for possible fast renegotiaion for routers
+               session[s].flags &= ~SF_LCP_ACKED;
+
                return;
        }
        if (*p != ConfigReq)
@@ -820,7 +844,7 @@ void processccp(tunnelidt t, sessionidt s, u8 *p, u16 l)
                        *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");   
+                       LOG(1,0,0,0, "Failed to send CCP packet.\n");
                        return;
                }
                tunnelsend(b, l + (q - b), t); // send it
@@ -910,26 +934,6 @@ u8 *makeppp(u8 *b, int size, u8 *p, int l, tunnelidt t, sessionidt s, u16 mtype)
        return b;
 }
 
-// find a PPP option, returns point to option, or 0 if not found
-u8 *findppp(u8 *b, u8 mtype)
-{
-       u16 l = ntohs(*(u16 *) (b + 2));
-       if (l < 4)
-               return 0;
-       b += 4;
-       l -= 4;
-       while (l)
-       {
-               if (l < b[1] || !b[1])
-                       return 0;               // faulty
-               if (*b == mtype)
-                       return b;
-               l -= b[1];
-               b += b[1];
-       }
-       return 0;
-}
-
 // Send initial LCP ConfigReq
 void initlcp(tunnelidt t, sessionidt s)
 {
@@ -955,7 +959,7 @@ void initlcp(tunnelidt t, sessionidt s)
 }
 
 // Send CCP reply
-void sendccp(tunnelidt t, sessionidt s)
+static void sendccp(tunnelidt t, sessionidt s)
 {
        char *q, b[500] = {0};