reduce logging of LCP EchoReply packets

[l2tpns.git] / l2tpns.c

diff --git a/l2tpns.c b/l2tpns.c
index caa8bd4..ada7468 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
 
 // 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 1.145 2005/10/18 07:19:28 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.152 2005/12/14 02:19:15 bodea Exp $";

 
 #include <arpa/inet.h>
 #include <assert.h>
 
 #include <arpa/inet.h>
 #include <assert.h>


@@ -96,9 +96,9 @@ uint32_t eth_tx = 0;
 static uint32_t ip_pool_size = 1;      // Size of the pool of addresses used for dynamic address allocation.
 time_t time_now = 0;                   // Current time in seconds since epoch.
 static char time_now_string[64] = {0}; // Current time as a string.
 static uint32_t ip_pool_size = 1;      // Size of the pool of addresses used for dynamic address allocation.
 time_t time_now = 0;                   // Current time in seconds since epoch.
 static char time_now_string[64] = {0}; // Current time as a string.

-int time_changed = 0;                  // time_now changed
+static int time_changed = 0;           // time_now changed

 char main_quit = 0;                    // True if we're in the process of exiting.
 char main_quit = 0;                    // True if we're in the process of exiting.

-char main_reload = 0;                  // Re-load pending
+static char main_reload = 0;           // Re-load pending

 linked_list *loaded_plugins;
 linked_list *plugins[MAX_PLUGIN_TYPES];
 
 linked_list *loaded_plugins;
 linked_list *plugins[MAX_PLUGIN_TYPES];
 


@@ -554,6 +554,13 @@ static void inittun(void)
                LOG(0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno));
                exit(1);
        }
                LOG(0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno));
                exit(1);
        }

+       /* set MTU to modem MRU + 4 (tun header) */
+       ifr.ifr_mtu = MRU + 4;
+       if (ioctl(ifrfd, SIOCSIFMTU, (void *) &ifr) < 0)
+       {
+               LOG(0, 0, 0, "Error setting tun MTU: %s\n", strerror(errno));
+               exit(1);
+       }

        ifr.ifr_flags = IFF_UP;
        if (ioctl(ifrfd, SIOCSIFFLAGS, (void *) &ifr) < 0)
        {
        ifr.ifr_flags = IFF_UP;
        if (ioctl(ifrfd, SIOCSIFFLAGS, (void *) &ifr) < 0)
        {


@@ -933,18 +940,14 @@ void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t)
 
        if (!t)
        {
 
        if (!t)
        {

-               static int backtrace_count = 0;

                LOG(0, 0, t, "tunnelsend called with 0 as tunnel id\n");
                STAT(tunnel_tx_errors);
                LOG(0, 0, t, "tunnelsend called with 0 as tunnel id\n");
                STAT(tunnel_tx_errors);

-               log_backtrace(backtrace_count, 5)

                return;
        }
 
        if (!tunnel[t].ip)
        {
                return;
        }
 
        if (!tunnel[t].ip)
        {

-               static int backtrace_count = 0;

                LOG(1, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");
                LOG(1, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");

-               log_backtrace(backtrace_count, 5)

                STAT(tunnel_tx_errors);
                return;
        }
                STAT(tunnel_tx_errors);
                return;
        }


@@ -1043,7 +1046,7 @@ void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *t
        sum = orig + (~MSS & 0xffff);
        sum += ntohs(*(uint16_t *) (tcp + 16));
        sum = (sum & 0xffff) + (sum >> 16);
        sum = orig + (~MSS & 0xffff);
        sum += ntohs(*(uint16_t *) (tcp + 16));
        sum = (sum & 0xffff) + (sum >> 16);

-       *(uint16_t *) (tcp + 16) = htons(sum);
+       *(uint16_t *) (tcp + 16) = htons(sum + (sum >> 16));

 }
 
 // process outgoing (to tunnel) IP
 }
 
 // process outgoing (to tunnel) IP


@@ -1170,7 +1173,8 @@ static void processipout(uint8_t *buf, int len)
                        master_throttle_packet(sp->tbf_out, data, size);
                return;
        }
                        master_throttle_packet(sp->tbf_out, data, size);
                return;
        }

-       else if (sp->walled_garden && !config->cluster_iam_master)
+
+       if (sp->walled_garden && !config->cluster_iam_master)

        {
                // We are walled-gardening this
                master_garden_packet(s, data, size);
        {
                // We are walled-gardening this
                master_garden_packet(s, data, size);


@@ -1682,6 +1686,7 @@ void sendipcp(sessionidt s, tunnelidt t)
                                 my_address; // send my IP
 
        tunnelsend(buf, 10 + (q - buf), t); // send it
                                 my_address; // send my IP
 
        tunnelsend(buf, 10 + (q - buf), t); // send it

+       restart_timer(s, ipcp);

 }
 
 void sendipv6cp(sessionidt s, tunnelidt t)
 }
 
 void sendipv6cp(sessionidt s, tunnelidt t)


@@ -1707,6 +1712,7 @@ void sendipv6cp(sessionidt s, tunnelidt t)
        q[13] = 1;
 
        tunnelsend(buf, 14 + (q - buf), t);     // send it
        q[13] = 1;
 
        tunnelsend(buf, 14 + (q - buf), t);     // send it

+       restart_timer(s, ipv6cp);

 }
 
 static void sessionclear(sessionidt s)
 }
 
 static void sessionclear(sessionidt s)


@@ -2327,9 +2333,9 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                                        if (*p == 5 && p[1] == 6) // Magic-Number
                                                                amagic = ntohl(*(uint32_t *) (p + 2));
                                                        else if (*p == 7) // Protocol-Field-Compression
                                                        if (*p == 5 && p[1] == 6) // Magic-Number
                                                                amagic = ntohl(*(uint32_t *) (p + 2));
                                                        else if (*p == 7) // Protocol-Field-Compression

-                                                               aflags |= SESSIONPFC;
+                                                               aflags |= SESSION_PFC;

                                                        else if (*p == 8) // Address-and-Control-Field-Compression
                                                        else if (*p == 8) // Address-and-Control-Field-Compression

-                                                               aflags |= SESSIONACFC;
+                                                               aflags |= SESSION_ACFC;

                                                        p += p[1];
                                                }
                                        }
                                                        p += p[1];
                                                }
                                        }


@@ -2456,20 +2462,17 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                case 12:      // ICCN
                                        if (amagic == 0) amagic = time_now;
                                        session[s].magic = amagic; // set magic number
                                case 12:      // ICCN
                                        if (amagic == 0) amagic = time_now;
                                        session[s].magic = amagic; // set magic number

-                                       session[s].l2tp_flags = aflags; // set flags received
+                                       session[s].flags = aflags; // set flags received

                                        session[s].mru = PPPMTU; // default
                                        controlnull(t); // ack
 
                                        // start LCP
                                        session[s].mru = PPPMTU; // default
                                        controlnull(t); // ack
 
                                        // start LCP

-                                       sess_local[s].lcp.restart = time_now + config->ppp_restart_time;
-                                       sess_local[s].lcp.conf_sent = 1;
-                                       sess_local[s].lcp.nak_sent = 0;

                                        sess_local[s].lcp_authtype = config->radius_authprefer;
                                        sess_local[s].ppp_mru = MRU;
                                        sess_local[s].lcp_authtype = config->radius_authprefer;
                                        sess_local[s].ppp_mru = MRU;

-                                       session[s].ppp.lcp = RequestSent;

                                        sendlcp(s, t);
                                        sendlcp(s, t);

-
+                                       change_state(s, lcp, RequestSent);

                                        break;
                                        break;

+

                                case 14:      // CDN
                                        controlnull(t); // ack
                                        sessionshutdown(s, "Closed (Received CDN).", 0, 0);
                                case 14:      // CDN
                                        controlnull(t); // ack
                                        sessionshutdown(s, "Closed (Received CDN).", 0, 0);


@@ -2608,29 +2611,9 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                }
                else if (session[s].ppp.lcp == Opened)
                {
                }
                else if (session[s].ppp.lcp == Opened)
                {

-                       uint8_t buf[MAXETHER];
-                       uint8_t *q;
-                       int mru = session[s].mru;
-                       if (mru > sizeof(buf)) mru = sizeof(buf);
-
-                       l += 6;
-                       if (l > mru) l = mru;
-
-                       q = makeppp(buf, sizeof(buf), 0, 0, s, t, PPPLCP);
-                       if (!q) return;
-
-                       *q = ProtocolRej;
-                       *(q + 1) = ++sess_local[s].lcp_ident;
-                       *(uint16_t *)(q + 2) = htons(l);
-                       *(uint16_t *)(q + 4) = htons(proto);
-                       memcpy(q + 6, p, l - 6);
-
-                       if (proto == PPPIPV6CP)
-                               LOG(3, s, t, "LCP: send ProtocolRej (IPV6CP: not configured)\n");
-                       else
-                               LOG(2, s, t, "LCP: sent ProtocolRej (0x%04X: unsupported)\n", proto);
-
-                       tunnelsend(buf, l + (q - buf), t);
+                       session[s].last_packet = time_now;
+                       if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
+                       protoreject(s, t, p, l, proto);

                }
                else
                {
                }
                else
                {


@@ -2817,8 +2800,6 @@ static void regular_cleanups(double period)
                                if (sess_local[s].lcp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for LCP ConfigReq... resending\n");
                                if (sess_local[s].lcp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for LCP ConfigReq... resending\n");

-                                       sess_local[s].lcp.restart = time_now + config->ppp_restart_time;
-                                       sess_local[s].lcp.conf_sent++;

                                        sendlcp(s, session[s].tunnel);
                                        change_state(s, lcp, next_state);
                                }
                                        sendlcp(s, session[s].tunnel);
                                        change_state(s, lcp, next_state);
                                }


@@ -2848,8 +2829,6 @@ static void regular_cleanups(double period)
                                if (sess_local[s].ipcp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for IPCP ConfigReq... resending\n");
                                if (sess_local[s].ipcp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for IPCP ConfigReq... resending\n");

-                                       sess_local[s].ipcp.restart = time_now + config->ppp_restart_time;
-                                       sess_local[s].ipcp.conf_sent++;

                                        sendipcp(s, session[s].tunnel);
                                        change_state(s, ipcp, next_state);
                                }
                                        sendipcp(s, session[s].tunnel);
                                        change_state(s, ipcp, next_state);
                                }


@@ -2879,8 +2858,6 @@ static void regular_cleanups(double period)
                                if (sess_local[s].ipv6cp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for IPV6CP ConfigReq... resending\n");
                                if (sess_local[s].ipv6cp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for IPV6CP ConfigReq... resending\n");

-                                       sess_local[s].ipv6cp.restart = time_now + config->ppp_restart_time;
-                                       sess_local[s].ipv6cp.conf_sent++;

                                        sendipv6cp(s, session[s].tunnel);
                                        change_state(s, ipv6cp, next_state);
                                }
                                        sendipv6cp(s, session[s].tunnel);
                                        change_state(s, ipv6cp, next_state);
                                }


@@ -2907,8 +2884,6 @@ static void regular_cleanups(double period)
                                if (sess_local[s].ccp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for CCP ConfigReq... resending\n");
                                if (sess_local[s].ccp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for CCP ConfigReq... resending\n");

-                                       sess_local[s].ccp.restart = time_now + config->ppp_restart_time;
-                                       sess_local[s].ccp.conf_sent++;

                                        sendccp(s, session[s].tunnel);
                                        change_state(s, ccp, next_state);
                                }
                                        sendccp(s, session[s].tunnel);
                                        change_state(s, ccp, next_state);
                                }


@@ -5359,7 +5334,9 @@ int ip_filter(uint8_t *buf, int len, uint8_t filter)
 
                if (frag_offset)
                {
 
                if (frag_offset)
                {

-                       if (!rule->frag || rule->action == FILTER_ACTION_DENY)
+                       // layer 4 deny rules are skipped
+                       if (rule->action == FILTER_ACTION_DENY &&
+                           (rule->src_ports.op || rule->dst_ports.op || rule->tcp_flag_op))

                                continue;
                }
                else
                                continue;
                }
                else