send snooped packets before adding the tun header

[l2tpns.git] / l2tpns.c

diff --git a/l2tpns.c b/l2tpns.c
index 9f49b96..6b0e620 100644 (file)
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -4,7 +4,7 @@
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 
-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.37 2004/11/02 04:35:04 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.41 2004/11/04 06:05:55 bodea Exp $";
 
 #include <arpa/inet.h>
 #include <assert.h>
@@ -23,6 +23,7 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.37 2004/11/02 04:35:04 bodea Exp
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <ctype.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
@@ -239,7 +240,7 @@ void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format,
        va_end(ap);
 }
 
-void _log_hex(int level, ipt address, sessionidt s, tunnelidt t, const char *title, const char *data, int maxsize)
+void _log_hex(int level, const char *title, const char *data, int maxsize)
 {
        int i, j;
        const u8 *d = (const u8 *)data;
@@ -249,7 +250,7 @@ void _log_hex(int level, ipt address, sessionidt s, tunnelidt t, const char *tit
        // No support for log_hex to syslog
        if (log_stream)
        {
-               log(level, address, s, t, "%s (%d bytes):\n", title, maxsize);
+               _log(level, 0, 0, 0, "%s (%d bytes):\n", title, maxsize);
                setvbuf(log_stream, NULL, _IOFBF, 16384);
 
                for (i = 0; i < maxsize; )
@@ -1003,7 +1004,7 @@ void throttle_session(sessionidt s, int rate_in, int rate_out)
                        free_tbf(session[s].tbf_out);
 
                if (rate_out > 0)
-                       session[s].tbf_out = new_tbf(s, bytes * 2, bytes, send_ipin);
+                       session[s].tbf_out = new_tbf(s, bytes * 2, bytes, send_ipout);
                else
                        session[s].tbf_out = 0;
 
@@ -1923,27 +1924,12 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                }
                else if (prot == PPPIP)
                {
-                       if (!config->cluster_iam_master)
+                       session[s].last_packet = time_now;
+                       if (session[s].walled_garden && !config->cluster_iam_master)
                        {
-                               // We're a slave. Should we forward this packet to the master?
-
-                               // Is this a walled garden session, or something that needs it's
-                               // idle time updated??
-
-                               // Maintain the idle timeouts on the master. If this would
-                               // significantly reset the idletimeout, run it via the master
-                               // to refresh the master's idle timer.
-                               // Not sure this is ideal: It may re-order packets.
-
-                               if (session[s].walled_garden || (session[s].last_packet + (ECHO_TIMEOUT/2)) < time_now)
-                               {
-                                       master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
-                                       session[s].last_packet = time_now;
-                                       return;
-                               }
-                               // fall through to processipin.
-                       } else
-                               session[s].last_packet = time_now;
+                               master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
+                               return;
+                       }
                        processipin(t, s, p, l);
                }
                else
@@ -2442,6 +2428,71 @@ void mainloop(void)
        // Important!!! We MUST not process any packets past this point!
 }
 
+static void stripdomain(char *host)
+{
+       char *p;
+
+       if ((p = strchr(host, '.')))
+       {
+               char *domain = 0;
+               char _domain[1024];
+
+               // strip off domain
+               FILE *resolv = fopen("/etc/resolv.conf", "r");
+               if (resolv)
+               {
+                       char buf[1024];
+                       char *b;
+
+                       while (fgets(buf, sizeof(buf), resolv))
+                       {
+                               if (strncmp(buf, "domain", 6) && strncmp(buf, "search", 6))
+                                       continue;
+
+                               if (!isspace(buf[6]))
+                                       continue;
+
+                               b = buf + 7;
+                               while (isspace(*b)) b++;
+
+                               if (*b)
+                               {
+                                       char *d = b;
+                                       while (*b && !isspace(*b)) b++;
+                                       *b = 0;
+                                       if (buf[0] == 'd') // domain is canonical
+                                       {
+                                               domain = d;
+                                               break;
+                                       }
+
+                                       // first search line
+                                       if (!domain)
+                                       {
+                                               // hold, may be subsequent domain line
+                                               strncpy(_domain, d, sizeof(_domain))[sizeof(_domain)-1] = 0;
+                                               domain = _domain;
+                                       }
+                               }
+                       }
+
+                       fclose(resolv);
+               }
+
+               if (domain)
+               {
+                       int hl = strlen(host);
+                       int dl = strlen(domain);
+                       if (dl < hl && host[hl - dl - 1] == '.' && !strcmp(host + hl - dl, domain))
+                               host[hl -dl - 1] = 0;
+               }
+               else
+               {
+                       *p = 0; // everything after first dot
+               }
+       }
+}
+
 // Init data structures
 void initdata(int optdebug, char *optconfig)
 {
@@ -2536,10 +2587,9 @@ void initdata(int optdebug, char *optconfig)
 
        if (!*hostname)
        {
-               char *p;
                // Grab my hostname unless it's been specified
                gethostname(hostname, sizeof(hostname));
-               if ((p = strchr(hostname, '.'))) *p = 0;
+               stripdomain(hostname);
        }
 
        _statistics->start_time = _statistics->last_reset = time(NULL);
@@ -3523,15 +3573,14 @@ int sessionsetup(tunnelidt t, sessionidt s)
        if (!session[s].ip || session[s].ip == 0xFFFFFFFE)
        {
                assign_ip_address(s);
-               if (session[s].ip)
-                       log(3, 0, s, t, "   No IP allocated. Assigned %s from pool\n",
-                                       inet_toa(htonl(session[s].ip)));
-               else
+               if (!session[s].ip)
                {
                        log(0, 0, s, t, "   No IP allocated. The IP address pool is FULL!\n");
                        sessionshutdown(s, "No IP addresses available");
                        return 0;
                }
+               log(3, 0, s, t, "   No IP allocated. Assigned %s from pool\n",
+                       inet_toa(htonl(session[s].ip)));
        }