don't send 4 byte header when snooping v6 packets

[l2tpns.git] / l2tpns.c

diff --git a/l2tpns.c b/l2tpns.c
index f6a4d51..778dd24 100644 (file)
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -1,10 +1,10 @@
 // L2TP Network Server
 // Adrian Kennard 2002
 // L2TP Network Server
 // Adrian Kennard 2002

-// Copyright (c) 2003, 2004 Optus Internet Engineering
+// Copyright (c) 2003, 2004, 2005 Optus Internet Engineering

 // 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 1.64 2004-12-09 13:05:00 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.80 2005-01-25 04:19:05 bodea Exp $";

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


@@ -19,6 +19,7 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.64 2004-12-09 13:05:00 bodea Exp
 #include <sys/mman.h>
 #include <netdb.h>
 #include <netinet/in.h>
 #include <sys/mman.h>
 #include <netdb.h>
 #include <netinet/in.h>

+#include <netinet/ip6.h>

 #include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>


@@ -62,25 +63,32 @@ int clifd = -1;                     // Socket listening for CLI connections.
 int snoopfd = -1;              // UDP file handle for sending out intercept data
 int *radfds = NULL;            // RADIUS requests file handles
 int ifrfd = -1;                        // File descriptor for routing, etc
 int snoopfd = -1;              // UDP file handle for sending out intercept data
 int *radfds = NULL;            // RADIUS requests file handles
 int ifrfd = -1;                        // File descriptor for routing, etc

+int ifr6fd = -1;               // File descriptor for IPv6 routing, etc
+static int rand_fd = -1;       // Random data source

 time_t basetime = 0;           // base clock
 char hostname[1000] = "";      // us.
 time_t basetime = 0;           // base clock
 char hostname[1000] = "";      // us.

-static u32 sessionid = 0;      // session id for radius accounting
+static int tunidx;             // ifr_ifindex of tun device
+static uint32_t sessionid = 0; // session id for radius accounting

 static int syslog_log = 0;     // are we logging to syslog
 static FILE *log_stream = NULL;        // file handle for direct logging (i.e. direct into file, not via syslog).
 extern int cluster_sockfd;     // Intra-cluster communications socket.
 static int syslog_log = 0;     // are we logging to syslog
 static FILE *log_stream = NULL;        // file handle for direct logging (i.e. direct into file, not via syslog).
 extern int cluster_sockfd;     // Intra-cluster communications socket.

-u32 last_id = 0;               // Last used PPP SID. Can I kill this?? -- mo
+uint32_t last_id = 0;          // Last used PPP SID. Can I kill this?? -- mo

 
 struct cli_session_actions *cli_session_actions = NULL;        // Pending session changes requested by CLI
 struct cli_tunnel_actions *cli_tunnel_actions = NULL;  // Pending tunnel changes required by CLI
 
 static void *ip_hash[256];     // Mapping from IP address to session structures.
 
 struct cli_session_actions *cli_session_actions = NULL;        // Pending session changes requested by CLI
 struct cli_tunnel_actions *cli_tunnel_actions = NULL;  // Pending tunnel changes required by CLI
 
 static void *ip_hash[256];     // Mapping from IP address to session structures.

+struct ipv6radix {
+       int sess;
+       struct ipv6radix *branch;
+} ipv6_hash[256];              // Mapping from IPv6 address to session structures.

 
 // Traffic counters.
 
 // Traffic counters.

-static u32 udp_rx = 0, udp_rx_pkt = 0, udp_tx = 0;
-static u32 eth_rx = 0, eth_rx_pkt = 0;
-u32 eth_tx = 0;
+static uint32_t udp_rx = 0, udp_rx_pkt = 0, udp_tx = 0;
+static uint32_t eth_rx = 0, eth_rx_pkt = 0;
+uint32_t eth_tx = 0;

 
 

-static u32 ip_pool_size = 1;           // Size of the pool of addresses used for dynamic address allocation.
+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 char main_quit = 0;             // True if we're in the process of exiting.
 time_t time_now = 0;                   // Current time in seconds since epoch.
 static char time_now_string[64] = {0}; // Current time as a string.
 static char main_quit = 0;             // True if we're in the process of exiting.


@@ -94,18 +102,20 @@ config_descriptt config_values[] = {
        CONFIG("debug", debug, INT),
        CONFIG("log_file", log_filename, STRING),
        CONFIG("pid_file", pid_file, STRING),
        CONFIG("debug", debug, INT),
        CONFIG("log_file", log_filename, STRING),
        CONFIG("pid_file", pid_file, STRING),

+       CONFIG("random_device", random_device, STRING),

        CONFIG("l2tp_secret", l2tpsecret, STRING),
        CONFIG("l2tp_secret", l2tpsecret, STRING),

-       CONFIG("primary_dns", default_dns1, IP),
-       CONFIG("secondary_dns", default_dns2, IP),
+       CONFIG("primary_dns", default_dns1, IPv4),
+       CONFIG("secondary_dns", default_dns2, IPv4),

        CONFIG("save_state", save_state, BOOL),
        CONFIG("save_state", save_state, BOOL),

-       CONFIG("primary_radius", radiusserver[0], IP),
-       CONFIG("secondary_radius", radiusserver[1], IP),
+       CONFIG("primary_radius", radiusserver[0], IPv4),
+       CONFIG("secondary_radius", radiusserver[1], IPv4),

        CONFIG("primary_radius_port", radiusport[0], SHORT),
        CONFIG("secondary_radius_port", radiusport[1], SHORT),
        CONFIG("radius_accounting", radius_accounting, BOOL),
        CONFIG("radius_secret", radiussecret, STRING),
        CONFIG("primary_radius_port", radiusport[0], SHORT),
        CONFIG("secondary_radius_port", radiusport[1], SHORT),
        CONFIG("radius_accounting", radius_accounting, BOOL),
        CONFIG("radius_secret", radiussecret, STRING),

-       CONFIG("bind_address", bind_address, IP),
-       CONFIG("peer_address", peer_address, IP),
+       CONFIG("radius_authtypes", radius_authtypes_s, STRING),
+       CONFIG("bind_address", bind_address, IPv4),
+       CONFIG("peer_address", peer_address, IPv4),

        CONFIG("send_garp", send_garp, BOOL),
        CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG),
        CONFIG("throttle_buckets", num_tbfs, INT),
        CONFIG("send_garp", send_garp, BOOL),
        CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG),
        CONFIG("throttle_buckets", num_tbfs, INT),


@@ -117,10 +127,12 @@ config_descriptt config_values[] = {
        CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
        CONFIG("lock_pages", lock_pages, BOOL),
        CONFIG("icmp_rate", icmp_rate, INT),
        CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
        CONFIG("lock_pages", lock_pages, BOOL),
        CONFIG("icmp_rate", icmp_rate, INT),

-       CONFIG("cluster_address", cluster_address, IP),
+       CONFIG("packet_limit", max_packets, INT),
+       CONFIG("cluster_address", cluster_address, IPv4),

        CONFIG("cluster_interface", cluster_interface, STRING),
        CONFIG("cluster_hb_interval", cluster_hb_interval, INT),
        CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
        CONFIG("cluster_interface", cluster_interface, STRING),
        CONFIG("cluster_hb_interval", cluster_hb_interval, INT),
        CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),

+       CONFIG("ipv6_prefix", ipv6_prefix, IPv6),

        { NULL, 0, 0, 0 },
 };
 
        { NULL, 0, 0, 0 },
 };
 


@@ -141,9 +153,13 @@ static char *plugin_functions[] = {
 
 #define max_plugin_functions (sizeof(plugin_functions) / sizeof(char *))
 
 
 #define max_plugin_functions (sizeof(plugin_functions) / sizeof(char *))
 

+// Counters for shutdown sessions
+static sessiont shut_acct[8192];
+static sessionidt shut_acct_n = 0;
+

 tunnelt *tunnel = NULL;                        // Array of tunnel structures.
 sessiont *session = NULL;              // Array of session structures.
 tunnelt *tunnel = NULL;                        // Array of tunnel structures.
 sessiont *session = NULL;              // Array of session structures.

-sessioncountt *sess_count = NULL;      // Array of partial per-session traffic counters.
+sessionlocalt *sess_local = NULL;      // Array of local per-session counters.

 radiust *radius = NULL;                        // Array of radius structures.
 ippoolt *ip_address_pool = NULL;       // Array of dynamic IP addresses.
 ip_filtert *ip_filters = NULL; // Array of named filters.
 radiust *radius = NULL;                        // Array of radius structures.
 ippoolt *ip_address_pool = NULL;       // Array of dynamic IP addresses.
 ip_filtert *ip_filters = NULL; // Array of named filters.


@@ -153,10 +169,11 @@ struct Tstats *_statistics = NULL;
 struct Tringbuffer *ringbuffer = NULL;
 #endif
 
 struct Tringbuffer *ringbuffer = NULL;
 #endif
 

-static void cache_ipmap(ipt ip, int s);
-static void uncache_ipmap(ipt ip);
+static void cache_ipmap(in_addr_t ip, int s);
+static void uncache_ipmap(in_addr_t ip);
+static void cache_ipv6map(struct in6_addr ip, int prefixlen, int s);

 static void free_ip_address(sessionidt s);
 static void free_ip_address(sessionidt s);

-static void dump_acct_info(void);
+static void dump_acct_info(int all);

 static void sighup_handler(int sig);
 static void sigalrm_handler(int sig);
 static void sigterm_handler(int sig);
 static void sighup_handler(int sig);
 static void sigalrm_handler(int sig);
 static void sigterm_handler(int sig);


@@ -164,16 +181,16 @@ static void sigquit_handler(int sig);
 static void sigchild_handler(int sig);
 static void read_state(void);
 static void dump_state(void);
 static void sigchild_handler(int sig);
 static void read_state(void);
 static void dump_state(void);

-static void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response);
+static void build_chap_response(char *challenge, uint8_t id, uint16_t challenge_length, char **challenge_response);

 static void update_config(void);
 static void read_config_file(void);
 static void initplugins(void);
 static int add_plugin(char *plugin_name);
 static int remove_plugin(char *plugin_name);
 static void plugins_done(void);
 static void update_config(void);
 static void read_config_file(void);
 static void initplugins(void);
 static int add_plugin(char *plugin_name);
 static int remove_plugin(char *plugin_name);
 static void plugins_done(void);

-static void processcontrol(u8 * buf, int len, struct sockaddr_in *addr, int alen);
+static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen);

 static tunnelidt new_tunnel(void);
 static tunnelidt new_tunnel(void);

-static int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length);
+static int unhide_avp(uint8_t *avp, tunnelidt t, sessionidt s, uint16_t length);

 
 // return internal time (10ths since process startup)
 static clockt now(void)
 
 // return internal time (10ths since process startup)
 static clockt now(void)


@@ -186,7 +203,7 @@ static clockt now(void)
 // work out a retry time based on try number
 // This is a straight bounded exponential backoff.
 // Maximum re-try time is 32 seconds. (2^5).
 // work out a retry time based on try number
 // This is a straight bounded exponential backoff.
 // Maximum re-try time is 32 seconds. (2^5).

-clockt backoff(u8 try)
+clockt backoff(uint8_t try)

 {
        if (try > 5) try = 5;                  // max backoff
        return now() + 10 * (1 << try);
 {
        if (try > 5) try = 5;                  // max backoff
        return now() + 10 * (1 << try);


@@ -199,7 +216,6 @@ clockt backoff(u8 try)
 void _log(int level, sessionidt s, tunnelidt t, const char *format, ...)
 {
        static char message[65536] = {0};
 void _log(int level, sessionidt s, tunnelidt t, const char *format, ...)
 {
        static char message[65536] = {0};

-       static char message2[65536] = {0};

        va_list ap;
 
 #ifdef RINGBUFFER
        va_list ap;
 
 #ifdef RINGBUFFER


@@ -223,25 +239,20 @@ void _log(int level, sessionidt s, tunnelidt t, const char *format, ...)
        if (config->debug < level) return;
 
        va_start(ap, format);
        if (config->debug < level) return;
 
        va_start(ap, format);

+       vsnprintf(message, sizeof(message), format, ap);
+

        if (log_stream)
        if (log_stream)

-       {
-               vsnprintf(message2, 65535, format, ap);
-               snprintf(message, 65535, "%s %02d/%02d %s", time_now_string, t, s, message2);
-               fprintf(log_stream, "%s", message);
-       }
+               fprintf(log_stream, "%s %02d/%02d %s", time_now_string, t, s, message);

        else if (syslog_log)
        else if (syslog_log)

-       {
-               vsnprintf(message2, 65535, format, ap);
-               snprintf(message, 65535, "%02d/%02d %s", t, s, message2);
-               syslog(level + 2, message); // We don't need LOG_EMERG or LOG_ALERT
-       }
+               syslog(level + 2, "%02d/%02d %s", t, s, message); // We don't need LOG_EMERG or LOG_ALERT
+

        va_end(ap);
 }
 
 void _log_hex(int level, const char *title, const char *data, int maxsize)
 {
        int i, j;
        va_end(ap);
 }
 
 void _log_hex(int level, const char *title, const char *data, int maxsize)
 {
        int i, j;

-       const u8 *d = (const u8 *)data;
+       const uint8_t *d = (const uint8_t *) data;

 
        if (config->debug < level) return;
 
 
        if (config->debug < level) return;
 


@@ -289,6 +300,72 @@ void _log_hex(int level, const char *title, const char *data, int maxsize)
        }
 }
 
        }
 }
 

+// initialise the random generator
+static void initrandom(char *source)
+{
+       static char path[sizeof(config->random_device)] = "*undefined*";
+
+       // reinitialise only if we are forced to do so or if the config has changed
+       if (source && !strncmp(path, source, sizeof(path)))
+               return;
+
+       // close previous source, if any
+       if (rand_fd >= 0) close(rand_fd);
+
+       rand_fd = -1;
+
+       if (source)
+       {
+               // register changes
+               snprintf(path, sizeof(path), "%s", source);
+
+               if (*path == '/')
+               {
+                       rand_fd = open(path, O_RDONLY|O_NONBLOCK);
+                       if (rand_fd < 0)
+                               LOG(0, 0, 0, "Error opening the random device %s: %s\n",
+                                       path, strerror(errno));
+               }
+       }
+
+       // no source: seed prng
+       {
+               unsigned seed = time_now ^ getpid();
+               LOG(4, 0, 0, "Seeding the pseudo random generator: %u\n", seed);
+               srand(seed);
+       }
+}
+
+// fill buffer with random data
+void random_data(uint8_t *buf, int len)
+{
+       int n = 0;
+
+       CSTAT(random_data);
+       if (rand_fd >= 0)
+       {
+               n = read(rand_fd, buf, len);
+               if (n >= len) return;
+               if (n < 0)
+               {
+                       if (errno != EAGAIN)
+                       {
+                               LOG(0, 0, 0, "Error reading from random source: %s\n",
+                                       strerror(errno));
+
+                               // fall back to rand()
+                               initrandom(0);
+                       }
+
+                       n = 0;
+               }
+       }
+
+       // append missing data
+       while (n < len)
+               // not using the low order bits from the prng stream
+               buf[n++] = (rand() >> 4) & 0xff;
+}

 
 // Add a route
 //
 
 // Add a route
 //


@@ -298,7 +375,7 @@ void _log_hex(int level, const char *title, const char *data, int maxsize)
 //
 // 'ip' and 'mask' must be in _host_ order.
 //
 //
 // 'ip' and 'mask' must be in _host_ order.
 //

-static void routeset(sessionidt s, ipt ip, ipt mask, ipt gw, u8 add)
+static void routeset(sessionidt s, in_addr_t ip, in_addr_t mask, in_addr_t gw, int add)

 {
        struct rtentry r;
        int i;
 {
        struct rtentry r;
        int i;


@@ -310,11 +387,11 @@ static void routeset(sessionidt s, ipt ip, ipt mask, ipt gw, u8 add)
        memset(&r, 0, sizeof(r));
        r.rt_dev = config->tundevice;
        r.rt_dst.sa_family = AF_INET;
        memset(&r, 0, sizeof(r));
        r.rt_dev = config->tundevice;
        r.rt_dst.sa_family = AF_INET;

-       *(u32 *) & (((struct sockaddr_in *) &r.rt_dst)->sin_addr.s_addr) = htonl(ip);
+       *(uint32_t *) & (((struct sockaddr_in *) &r.rt_dst)->sin_addr.s_addr) = htonl(ip);

        r.rt_gateway.sa_family = AF_INET;
        r.rt_gateway.sa_family = AF_INET;

-       *(u32 *) & (((struct sockaddr_in *) &r.rt_gateway)->sin_addr.s_addr) = htonl(gw);
+       *(uint32_t *) & (((struct sockaddr_in *) &r.rt_gateway)->sin_addr.s_addr) = htonl(gw);

        r.rt_genmask.sa_family = AF_INET;
        r.rt_genmask.sa_family = AF_INET;

-       *(u32 *) & (((struct sockaddr_in *) &r.rt_genmask)->sin_addr.s_addr) = htonl(mask);
+       *(uint32_t *) & (((struct sockaddr_in *) &r.rt_genmask)->sin_addr.s_addr) = htonl(mask);

        r.rt_flags = (RTF_UP | RTF_STATIC);
        if (gw)
                r.rt_flags |= RTF_GATEWAY;
        r.rt_flags = (RTF_UP | RTF_STATIC);
        if (gw)
                r.rt_flags |= RTF_GATEWAY;


@@ -353,11 +430,61 @@ static void routeset(sessionidt s, ipt ip, ipt mask, ipt gw, u8 add)
        }
 }
 
        }
 }
 

+void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add)
+{
+       struct in6_rtmsg rt;
+       char ipv6addr[INET6_ADDRSTRLEN];
+
+       if (ifr6fd < 0)
+       {
+               LOG(0, 0, 0, "Asked to set IPv6 route, but IPv6 not setup.\n");
+               return;
+       }
+
+       memset(&rt, 0, sizeof(rt));
+
+       memcpy(&rt.rtmsg_dst, &ip, sizeof(struct in6_addr));
+       rt.rtmsg_dst_len = prefixlen;
+       rt.rtmsg_metric = 1;
+       rt.rtmsg_flags = RTF_UP;
+       rt.rtmsg_ifindex = tunidx;
+
+       LOG(1, 0, 0, "Route %s %s/%d\n",
+           add ? "add" : "del",
+           inet_ntop(AF_INET6, &ip, ipv6addr, INET6_ADDRSTRLEN),
+           prefixlen);
+
+       if (ioctl(ifr6fd, add ? SIOCADDRT : SIOCDELRT, (void *) &rt) < 0)
+               LOG(0, 0, 0, "route6set() error in ioctl: %s\n",
+                               strerror(errno));
+
+       // FIXME: need to add BGP routing (RFC2858)
+
+       if (s)
+       {
+               if (!add)       // Are we deleting a route?
+                       s = 0;  // Caching the session as '0' is the same as uncaching.
+
+               cache_ipv6map(ip, prefixlen, s);
+       }
+       
+       return;
+}
+
+// defined in linux/ipv6.h, but tricky to include from user-space
+// TODO: move routing to use netlink rather than ioctl
+struct in6_ifreq {
+       struct in6_addr ifr6_addr;
+       __u32 ifr6_prefixlen;
+       unsigned int ifr6_ifindex;
+};
+

 //
 // Set up TUN interface
 static void inittun(void)
 {
        struct ifreq ifr;
 //
 // Set up TUN interface
 static void inittun(void)
 {
        struct ifreq ifr;

+       struct in6_ifreq ifr6;

        struct sockaddr_in sin = {0};
        memset(&ifr, 0, sizeof(ifr));
        ifr.ifr_flags = IFF_TUN;
        struct sockaddr_in sin = {0};
        memset(&ifr, 0, sizeof(ifr));
        ifr.ifr_flags = IFF_TUN;


@@ -403,6 +530,42 @@ static void inittun(void)
                LOG(0, 0, 0, "Error setting tun flags: %s\n", strerror(errno));
                exit(1);
        }
                LOG(0, 0, 0, "Error setting tun flags: %s\n", strerror(errno));
                exit(1);
        }

+       if (ioctl(ifrfd, SIOCGIFINDEX, (void *) &ifr) < 0)
+       {
+               LOG(0, 0, 0, "Error getting tun ifindex: %s\n", strerror(errno));
+               exit(1);
+       }
+       tunidx = ifr.ifr_ifindex;
+
+       // Only setup IPv6 on the tun device if we have a configured prefix
+       if (config->ipv6_prefix.s6_addr[0] > 0) {
+               ifr6fd = socket(PF_INET6, SOCK_DGRAM, 0);
+
+               // Link local address is FE80::1
+               memset(&ifr6.ifr6_addr, 0, sizeof(ifr6.ifr6_addr));
+               ifr6.ifr6_addr.s6_addr[0] = 0xFE;
+               ifr6.ifr6_addr.s6_addr[1] = 0x80;
+               ifr6.ifr6_addr.s6_addr[15] = 1;
+               ifr6.ifr6_prefixlen = 64;
+               ifr6.ifr6_ifindex = ifr.ifr_ifindex;
+               if (ioctl(ifr6fd, SIOCSIFADDR, (void *) &ifr6) < 0)
+               {
+                       LOG(0, 0, 0, "Error setting tun IPv6 link local address:"
+                               " %s\n", strerror(errno));
+               }
+
+               // Global address is prefix::1
+               memset(&ifr6.ifr6_addr, 0, sizeof(ifr6.ifr6_addr));
+               ifr6.ifr6_addr = config->ipv6_prefix;
+               ifr6.ifr6_addr.s6_addr[15] = 1;
+               ifr6.ifr6_prefixlen = 64;
+               ifr6.ifr6_ifindex = ifr.ifr_ifindex;
+               if (ioctl(ifr6fd, SIOCSIFADDR, (void *) &ifr6) < 0)
+               {
+                       LOG(0, 0, 0, "Error setting tun IPv6 global address: %s\n",
+                               strerror(errno));
+               }
+       }

 }
 
 // set up UDP port
 }
 
 // set up UDP port


@@ -457,27 +620,71 @@ static void initudp(void)
 // IP address.
 //
 
 // IP address.
 //
 

-static int lookup_ipmap(ipt ip)
+static int lookup_ipmap(in_addr_t ip)
+{
+       uint8_t *a = (uint8_t *) &ip;
+       uint8_t **d = (uint8_t **) ip_hash;
+
+       if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
+       if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
+       if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
+
+       return (int) (intptr_t) d[(size_t) *a];
+}
+
+int lookup_ipv6map(struct in6_addr ip)

 {
 {

-       u8 *a = (u8 *)&ip;
-       char **d = (char **) ip_hash;
+       struct ipv6radix *curnode;
+       int i;

        int s;
        int s;

+       char ipv6addr[INET6_ADDRSTRLEN];

 
 

-       if (!(d = (char **) d[(size_t) *a++])) return 0;
-       if (!(d = (char **) d[(size_t) *a++])) return 0;
-       if (!(d = (char **) d[(size_t) *a++])) return 0;
+       curnode = &ipv6_hash[ip.s6_addr[0]];
+       i = 1;
+       s = curnode->sess;
+
+       while (s == 0 && i < 15 && curnode->branch != NULL)
+       {
+               curnode = &curnode->branch[ip.s6_addr[i]];
+               s = curnode->sess;
+               i++;
+       }
+
+       LOG(4, s, session[s].tunnel, "Looking up address %s and got %d\n",
+                       inet_ntop(AF_INET6, &ip, ipv6addr,
+                               INET6_ADDRSTRLEN),
+                       s);

 
 

-       s = (ipt) d[(size_t) *a];

        return s;
 }
 
        return s;
 }
 

-sessionidt sessionbyip(ipt ip)
+sessionidt sessionbyip(in_addr_t ip)

 {
        int s = lookup_ipmap(ip);
 {
        int s = lookup_ipmap(ip);

-       CSTAT(call_sessionbyip);
+       CSTAT(sessionbyip);
+
+       if (s > 0 && s < MAXSESSION && session[s].tunnel)
+               return (sessionidt) s;
+
+       return 0;
+}
+
+sessionidt sessionbyipv6(struct in6_addr ip)
+{
+       int s;
+       CSTAT(sessionbyipv6);
+
+       if (!memcmp(&config->ipv6_prefix, &ip, 8) ||
+               (ip.s6_addr[0] == 0xFE && ip.s6_addr[1] == 0x80 &&
+                (ip.s6_addr16[1] == ip.s6_addr16[2] == ip.s6_addr16[3] == 0))) {
+               s = lookup_ipmap(*(in_addr_t *) &ip.s6_addr[8]);
+       } else {
+               s = lookup_ipv6map(ip);
+       }

 
        if (s > 0 && s < MAXSESSION && session[s].tunnel)
                return s;
 
        if (s > 0 && s < MAXSESSION && session[s].tunnel)
                return s;

+

        return 0;
 }
 
        return 0;
 }
 


@@ -487,25 +694,25 @@ sessionidt sessionbyip(ipt ip)
 //
 // (It's actually cached in network order)
 //
 //
 // (It's actually cached in network order)
 //

-static void cache_ipmap(ipt ip, int s)
+static void cache_ipmap(in_addr_t ip, int s)

 {
 {

-       ipt nip = htonl(ip);            // MUST be in network order. I.e. MSB must in be ((char*)(&ip))[0]
-       u8 *a = (u8 *) &nip;
-       char **d = (char **) ip_hash;
+       in_addr_t nip = htonl(ip);      // MUST be in network order. I.e. MSB must in be ((char *) (&ip))[0]
+       uint8_t *a = (uint8_t *) &nip;
+       uint8_t **d = (uint8_t **) ip_hash;

        int i;
 
        for (i = 0; i < 3; i++)
        {
                if (!d[(size_t) a[i]])
                {
        int i;
 
        for (i = 0; i < 3; i++)
        {
                if (!d[(size_t) a[i]])
                {

-                       if (!(d[(size_t) a[i]] = calloc(256, sizeof (void *))))
+                       if (!(d[(size_t) a[i]] = calloc(256, sizeof(void *))))

                                return;
                }
 
                                return;
                }
 

-               d = (char **) d[(size_t) a[i]];
+               d = (uint8_t **) d[(size_t) a[i]];

        }
 
        }
 

-       d[(size_t) a[3]] = (char *)((int)s);
+       d[(size_t) a[3]] = (uint8_t *) (intptr_t) s;

 
        if (s > 0)
                LOG(4, s, session[s].tunnel, "Caching ip address %s\n", fmtaddr(nip, 0));
 
        if (s > 0)
                LOG(4, s, session[s].tunnel, "Caching ip address %s\n", fmtaddr(nip, 0));


@@ -515,11 +722,47 @@ static void cache_ipmap(ipt ip, int s)
        // else a map to an ip pool index.
 }
 
        // else a map to an ip pool index.
 }
 

-static void uncache_ipmap(ipt ip)
+static void uncache_ipmap(in_addr_t ip)

 {
        cache_ipmap(ip, 0);     // Assign it to the NULL session.
 }
 
 {
        cache_ipmap(ip, 0);     // Assign it to the NULL session.
 }
 

+static void cache_ipv6map(struct in6_addr ip, int prefixlen, int s)
+{
+       int i;
+       int bytes;
+       struct ipv6radix *curnode;
+       char ipv6addr[INET6_ADDRSTRLEN];
+
+       curnode = &ipv6_hash[ip.s6_addr[0]];
+
+       bytes = prefixlen >> 3;
+       i = 1;
+       while (i < bytes) {
+               if (curnode->branch == NULL)
+               {
+                       if (!(curnode->branch = calloc(256,
+                                       sizeof (struct ipv6radix))))
+                               return;
+               }
+               curnode = &curnode->branch[ip.s6_addr[i]];
+               i++;
+       }
+
+       curnode->sess = s;
+
+       if (s > 0)
+               LOG(4, s, session[s].tunnel, "Caching ip address %s/%d\n",
+                               inet_ntop(AF_INET6, &ip, ipv6addr, 
+                                       INET6_ADDRSTRLEN),
+                               prefixlen);
+       else if (s == 0)
+               LOG(4, 0, 0, "Un-caching ip address %s/%d\n",
+                               inet_ntop(AF_INET6, &ip, ipv6addr, 
+                                       INET6_ADDRSTRLEN),
+                               prefixlen);
+}
+

 //
 // CLI list to dump current ipcache.
 //
 //
 // CLI list to dump current ipcache.
 //


@@ -538,22 +781,22 @@ int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc)
        {
                if (!d[i])
                        continue;
        {
                if (!d[i])
                        continue;

-               e = (char**) d[i];
+               e = (char **) d[i];

                for (j = 0; j < 256; ++j)
                {
                        if (!e[j])
                                continue;
                for (j = 0; j < 256; ++j)
                {
                        if (!e[j])
                                continue;

-                       f = (char**) e[j];
+                       f = (char **) e[j];

                        for (k = 0; k < 256; ++k)
                        {
                                if (!f[k])
                                        continue;
                        for (k = 0; k < 256; ++k)
                        {
                                if (!f[k])
                                        continue;

-                               g = (char**)f[k];
+                               g = (char **)f[k];

                                for (l = 0; l < 256; ++l)
                                {
                                        if (!g[l])
                                                continue;
                                for (l = 0; l < 256; ++l)
                                {
                                        if (!g[l])
                                                continue;

-                                       cli_print(cli, "%7d %d.%d.%d.%d", (int) g[l], i, j, k, l);
+                                       cli_print(cli, "%7d %d.%d.%d.%d", (int) (intptr_t) g[l], i, j, k, l);

                                        ++count;
                                }
                        }
                                        ++count;
                                }
                        }


@@ -573,7 +816,7 @@ int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc)
 sessionidt sessionbyuser(char *username)
 {
        int s;
 sessionidt sessionbyuser(char *username)
 {
        int s;

-       CSTAT(call_sessionbyuser);
+       CSTAT(sessionbyuser);

 
        for (s = 1; s < MAXSESSION ; ++s)
        {
 
        for (s = 1; s < MAXSESSION ; ++s)
        {


@@ -587,11 +830,11 @@ sessionidt sessionbyuser(char *username)
        return 0;       // Not found.
 }
 
        return 0;       // Not found.
 }
 

-void send_garp(ipt ip)
+void send_garp(in_addr_t ip)

 {
        int s;
        struct ifreq ifr;
 {
        int s;
        struct ifreq ifr;

-       u8 mac[6];
+       uint8_t mac[6];

 
        s = socket(PF_INET, SOCK_DGRAM, 0);
        if (s < 0)
 
        s = socket(PF_INET, SOCK_DGRAM, 0);
        if (s < 0)


@@ -633,11 +876,11 @@ static sessionidt sessionidtbysessiont(sessiont *s)
 }
 
 // actually send a control message for a specific tunnel
 }
 
 // actually send a control message for a specific tunnel

-void tunnelsend(u8 * buf, u16 l, tunnelidt t)
+void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t)

 {
        struct sockaddr_in addr;
 
 {
        struct sockaddr_in addr;
 

-       CSTAT(call_tunnelsend);
+       CSTAT(tunnelsend);

 
        if (!t)
        {
 
        if (!t)
        {


@@ -659,11 +902,11 @@ void tunnelsend(u8 * buf, u16 l, tunnelidt t)
 
        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;
 
        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;

-       *(u32 *) & addr.sin_addr = htonl(tunnel[t].ip);
+       *(uint32_t *) & addr.sin_addr = htonl(tunnel[t].ip);

        addr.sin_port = htons(tunnel[t].port);
 
        // sequence expected, if sequence in message
        addr.sin_port = htons(tunnel[t].port);
 
        // sequence expected, if sequence in message

-       if (*buf & 0x08) *(u16 *) (buf + ((*buf & 0x40) ? 10 : 8)) = htons(tunnel[t].nr);
+       if (*buf & 0x08) *(uint16_t *) (buf + ((*buf & 0x40) ? 10 : 8)) = htons(tunnel[t].nr);

 
        // If this is a control message, deal with retries
        if (*buf & 0x80)
 
        // If this is a control message, deal with retries
        if (*buf & 0x80)


@@ -679,7 +922,7 @@ void tunnelsend(u8 * buf, u16 l, tunnelidt t)
 
        if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
        {
 
        if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
        {

-               LOG(0, ntohs((*(u16 *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n",
+               LOG(0, ntohs((*(uint16_t *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n",

                                strerror(errno), udpfd, buf, l, inet_ntoa(addr.sin_addr));
                STAT(tunnel_tx_errors);
                return;
                                strerror(errno), udpfd, buf, l, inet_ntoa(addr.sin_addr));
                STAT(tunnel_tx_errors);
                return;


@@ -694,37 +937,37 @@ void tunnelsend(u8 * buf, u16 l, tunnelidt t)
 // Tiny helper function to write data to
 // the 'tun' device.
 //
 // Tiny helper function to write data to
 // the 'tun' device.
 //

-int tun_write(u8 * data, int size)
+int tun_write(uint8_t * data, int size)

 {
        return write(tunfd, data, size);
 }
 
 // process outgoing (to tunnel) IP
 //
 {
        return write(tunfd, data, size);
 }
 
 // process outgoing (to tunnel) IP
 //

-static void processipout(u8 * buf, int len)
+static void processipout(uint8_t * buf, int len)

 {
        sessionidt s;
        sessiont *sp;
        tunnelidt t;
 {
        sessionidt s;
        sessiont *sp;
        tunnelidt t;

-       ipt ip;
+       in_addr_t ip;

 
 

-       char * data = buf;      // Keep a copy of the originals.
+       char *data = buf;       // Keep a copy of the originals.

        int size = len;
 
        int size = len;
 

-       u8 b[MAXETHER + 20];
+       uint8_t b[MAXETHER + 20];

 
 

-       CSTAT(call_processipout);
+       CSTAT(processipout);

 
        if (len < MIN_IP_SIZE)
        {
                LOG(1, 0, 0, "Short IP, %d bytes\n", len);
 
        if (len < MIN_IP_SIZE)
        {
                LOG(1, 0, 0, "Short IP, %d bytes\n", len);

-               STAT(tunnel_tx_errors);
+               STAT(tun_rx_errors);

                return;
        }
        if (len >= MAXETHER)
        {
                LOG(1, 0, 0, "Oversize IP packet %d bytes\n", len);
                return;
        }
        if (len >= MAXETHER)
        {
                LOG(1, 0, 0, "Oversize IP packet %d bytes\n", len);

-               STAT(tunnel_tx_errors);
+               STAT(tun_rx_errors);

                return;
        }
 
                return;
        }
 


@@ -733,13 +976,13 @@ static void processipout(u8 * buf, int len)
        len -= 4;
 
        // Got an IP header now
        len -= 4;
 
        // Got an IP header now

-       if (*(u8 *)(buf) >> 4 != 4)
+       if (*(uint8_t *)(buf) >> 4 != 4)

        {
                LOG(1, 0, 0, "IP: Don't understand anything except IPv4\n");
                return;
        }
 
        {
                LOG(1, 0, 0, "IP: Don't understand anything except IPv4\n");
                return;
        }
 

-       ip = *(u32 *)(buf + 16);
+       ip = *(uint32_t *)(buf + 16);

        if (!(s = sessionbyip(ip)))
        {
                // Is this a packet for a session that doesn't exist?
        if (!(s = sessionbyip(ip)))
        {
                // Is this a packet for a session that doesn't exist?


@@ -754,14 +997,53 @@ static void processipout(u8 * buf, int len)
 
                if (rate++ < config->icmp_rate) // Only send a max of icmp_rate per second.
                {
 
                if (rate++ < config->icmp_rate) // Only send a max of icmp_rate per second.
                {

-                       LOG(4, 0, 0, "IP: Sending ICMP host unreachable to %s\n", fmtaddr(*(u32 *)(buf + 12), 0));
-                       host_unreachable(*(u32 *)(buf + 12), *(u16 *)(buf + 4), ip, buf, (len < 64) ? 64 : len);
+                       LOG(4, 0, 0, "IP: Sending ICMP host unreachable to %s\n", fmtaddr(*(in_addr_t *)(buf + 12), 0));
+                       host_unreachable(*(in_addr_t *)(buf + 12), *(uint16_t *)(buf + 4), ip, buf, (len < 64) ? 64 : len);

                }
                return;
        }
        t = session[s].tunnel;
        sp = &session[s];
 
                }
                return;
        }
        t = session[s].tunnel;
        sp = &session[s];
 

+       // DoS prevention: enforce a maximum number of packets per 0.1s for a session
+       if (config->max_packets > 0)
+       {
+               if (sess_local[s].last_packet_out == TIME)
+               {
+                       int max = config->max_packets;
+
+                       // All packets for throttled sessions are handled by the
+                       // master, so further limit by using the throttle rate.
+                       // A bit of a kludge, since throttle rate is in kbps,
+                       // but should still be generous given our average DSL
+                       // packet size is 200 bytes: a limit of 28kbps equates
+                       // to around 180 packets per second.
+                       if (!config->cluster_iam_master && sp->throttle_out && sp->throttle_out < max)
+                               max = sp->throttle_out;
+
+                       if (++sess_local[s].packets_out > max)
+                       {
+                               sess_local[s].packets_dropped++;
+                               return;
+                       }
+               }
+               else
+               {
+                       if (sess_local[s].packets_dropped)
+                       {
+                               INC_STAT(tun_rx_dropped, sess_local[s].packets_dropped);
+                               LOG(3, s, t, "Dropped %u/%u packets to %s for %suser %s\n",
+                                       sess_local[s].packets_dropped, sess_local[s].packets_out,
+                                       fmtaddr(ip, 0), sp->throttle_out ? "throttled " : "",
+                                       sp->user);
+                       }
+
+                       sess_local[s].last_packet_out = TIME;
+                       sess_local[s].packets_out = 1;
+                       sess_local[s].packets_dropped = 0;
+               }
+       }
+

        // run access-list if any
        if (session[s].filter_out && !ip_filter(buf, len, session[s].filter_out - 1))
                return;
        // run access-list if any
        if (session[s].filter_out && !ip_filter(buf, len, session[s].filter_out - 1))
                return;


@@ -786,7 +1068,116 @@ static void processipout(u8 * buf, int len)
 
        // Add on L2TP header
        {
 
        // Add on L2TP header
        {

-               u8 *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
+               uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
+               if (!p) return;
+               tunnelsend(b, len + (p-b), t); // send it...
+       }
+
+       // Snooping this session, send it to intercept box
+       if (sp->snoop_ip && sp->snoop_port)
+               snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
+
+       sp->cout += len; // byte count
+       sp->total_cout += len; // byte count
+       sp->pout++;
+       udp_tx += len;
+       sess_local[s].cout += len;      // To send to master..
+}
+
+// process outgoing (to tunnel) IPv6
+//
+void processipv6out(uint8_t * buf, int len)
+{
+       sessionidt s;
+       sessiont *sp;
+       tunnelidt t;
+       in_addr_t ip;
+       struct in6_addr ip6;
+
+       char *data = buf;       // Keep a copy of the originals.
+       int size = len;
+
+       uint8_t b[MAXETHER + 20];
+
+       CSTAT(processipv6out);
+
+       if (len < MIN_IP_SIZE)
+       {
+               LOG(1, 0, 0, "Short IPv6, %d bytes\n", len);
+               STAT(tunnel_tx_errors);
+               return;
+       }
+       if (len >= MAXETHER)
+       {
+               LOG(1, 0, 0, "Oversize IPv6 packet %d bytes\n", len);
+               STAT(tunnel_tx_errors);
+               return;
+       }
+
+       // Skip the tun header
+       buf += 4;
+       len -= 4;
+
+       // Got an IP header now
+       if (*(uint8_t *)(buf) >> 4 != 6)
+       {
+               LOG(1, 0, 0, "IP: Don't understand anything except IPv6\n");
+               return;
+       }
+
+       ip6 = *(struct in6_addr *)(buf+24);
+       s = sessionbyipv6(ip6);
+
+       if (s == 0)
+       {
+               ip = *(uint32_t *)(buf + 32);
+               s = sessionbyip(ip);
+       }
+       
+       if (s == 0)
+       {
+               // Is this a packet for a session that doesn't exist?
+               static int rate = 0;    // Number of ICMP packets we've sent this second.
+               static int last = 0;    // Last time we reset the ICMP packet counter 'rate'.
+
+               if (last != time_now)
+               {
+                       last = time_now;
+                       rate = 0;
+               }
+
+               if (rate++ < config->icmp_rate) // Only send a max of icmp_rate per second.
+               {
+                       // FIXME: Should send icmp6 host unreachable
+               }
+               return;
+       }
+       t = session[s].tunnel;
+       sp = &session[s];
+
+       // FIXME: add DoS prevention/filters?
+
+       if (sp->tbf_out)
+       {
+               // Are we throttling this session?
+               if (config->cluster_iam_master)
+                       tbf_queue_packet(sp->tbf_out, data, size);
+               else
+                       master_throttle_packet(sp->tbf_out, data, size);
+               return;
+       }
+       else if (sp->walled_garden && !config->cluster_iam_master)
+       {
+               // We are walled-gardening this
+               master_garden_packet(s, data, size);
+               return;
+       }
+
+       LOG(5, s, t, "Ethernet -> Tunnel (%d bytes)\n", len);
+
+       // Add on L2TP header
+       {
+               uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIPV6);

                if (!p) return;
                tunnelsend(b, len + (p-b), t); // send it...
        }
                if (!p) return;
                tunnelsend(b, len + (p-b), t); // send it...
        }


@@ -799,20 +1190,20 @@ static void processipout(u8 * buf, int len)
        sp->total_cout += len; // byte count
        sp->pout++;
        udp_tx += len;
        sp->total_cout += len; // byte count
        sp->pout++;
        udp_tx += len;

-       sess_count[s].cout += len;      // To send to master..
+       sess_local[s].cout += len;      // To send to master..

 }
 
 //
 // Helper routine for the TBF filters.
 // Used to send queued data in to the user!
 //
 }
 
 //
 // Helper routine for the TBF filters.
 // Used to send queued data in to the user!
 //

-static void send_ipout(sessionidt s, u8 *buf, int len)
+static void send_ipout(sessionidt s, uint8_t *buf, int len)

 {
        sessiont *sp;
        tunnelidt t;
 {
        sessiont *sp;
        tunnelidt t;

-       ipt ip;
+       in_addr_t ip;

 
 

-       u8 b[MAXETHER + 20];
+       uint8_t b[MAXETHER + 20];

 
        if (len < 0 || len > MAXETHER)
        {
 
        if (len < 0 || len > MAXETHER)
        {


@@ -824,7 +1215,7 @@ static void send_ipout(sessionidt s, u8 *buf, int len)
        buf += 4;
        len -= 4;
 
        buf += 4;
        len -= 4;
 

-       ip = *(u32 *)(buf + 16);
+       ip = *(in_addr_t *)(buf + 16);

 
        if (!session[s].ip)
                return;
 
        if (!session[s].ip)
                return;


@@ -836,7 +1227,7 @@ static void send_ipout(sessionidt s, u8 *buf, int len)
 
        // Add on L2TP header
        {
 
        // Add on L2TP header
        {

-               u8 *p = makeppp(b, sizeof(b),  buf, len, t, s, PPPIP);
+               uint8_t *p = makeppp(b, sizeof(b),  buf, len, t, s, PPPIP);

                if (!p) return;
                tunnelsend(b, len + (p-b), t); // send it...
        }
                if (!p) return;
                tunnelsend(b, len + (p-b), t); // send it...
        }


@@ -849,55 +1240,55 @@ static void send_ipout(sessionidt s, u8 *buf, int len)
        sp->total_cout += len; // byte count
        sp->pout++;
        udp_tx += len;
        sp->total_cout += len; // byte count
        sp->pout++;
        udp_tx += len;

-       sess_count[s].cout += len;      // To send to master..
+       sess_local[s].cout += len;      // To send to master..

 }
 
 // add an AVP (16 bit)
 }
 
 // add an AVP (16 bit)

-static void control16(controlt * c, u16 avp, u16 val, u8 m)
+static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)

 {
 {

-       u16 l = (m ? 0x8008 : 0x0008);
-       *(u16 *) (c->buf + c->length + 0) = htons(l);
-       *(u16 *) (c->buf + c->length + 2) = htons(0);
-       *(u16 *) (c->buf + c->length + 4) = htons(avp);
-       *(u16 *) (c->buf + c->length + 6) = htons(val);
+       uint16_t l = (m ? 0x8008 : 0x0008);
+       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
+       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
+       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
+       *(uint16_t *) (c->buf + c->length + 6) = htons(val);

        c->length += 8;
 }
 
 // add an AVP (32 bit)
        c->length += 8;
 }
 
 // add an AVP (32 bit)

-static void control32(controlt * c, u16 avp, u32 val, u8 m)
+static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)

 {
 {

-       u16 l = (m ? 0x800A : 0x000A);
-       *(u16 *) (c->buf + c->length + 0) = htons(l);
-       *(u16 *) (c->buf + c->length + 2) = htons(0);
-       *(u16 *) (c->buf + c->length + 4) = htons(avp);
-       *(u32 *) (c->buf + c->length + 6) = htonl(val);
+       uint16_t l = (m ? 0x800A : 0x000A);
+       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
+       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
+       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
+       *(uint32_t *) (c->buf + c->length + 6) = htonl(val);

        c->length += 10;
 }
 
 // add an AVP (32 bit)
        c->length += 10;
 }
 
 // add an AVP (32 bit)

-static void controls(controlt * c, u16 avp, char *val, u8 m)
+static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)

 {
 {

-       u16 l = ((m ? 0x8000 : 0) + strlen(val) + 6);
-       *(u16 *) (c->buf + c->length + 0) = htons(l);
-       *(u16 *) (c->buf + c->length + 2) = htons(0);
-       *(u16 *) (c->buf + c->length + 4) = htons(avp);
+       uint16_t l = ((m ? 0x8000 : 0) + strlen(val) + 6);
+       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
+       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
+       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);

        memcpy(c->buf + c->length + 6, val, strlen(val));
        c->length += 6 + strlen(val);
 }
 
 // add a binary AVP
        memcpy(c->buf + c->length + 6, val, strlen(val));
        c->length += 6 + strlen(val);
 }
 
 // add a binary AVP

-static void controlb(controlt * c, u16 avp, char *val, unsigned int len, u8 m)
+static void controlb(controlt * c, uint16_t avp, char *val, unsigned int len, uint8_t m)

 {
 {

-       u16 l = ((m ? 0x8000 : 0) + len + 6);
-       *(u16 *) (c->buf + c->length + 0) = htons(l);
-       *(u16 *) (c->buf + c->length + 2) = htons(0);
-       *(u16 *) (c->buf + c->length + 4) = htons(avp);
+       uint16_t l = ((m ? 0x8000 : 0) + len + 6);
+       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
+       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
+       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);

        memcpy(c->buf + c->length + 6, val, len);
        c->length += 6 + len;
 }
 
 // new control connection
        memcpy(c->buf + c->length + 6, val, len);
        c->length += 6 + len;
 }
 
 // new control connection

-static controlt *controlnew(u16 mtype)
+static controlt *controlnew(uint16_t mtype)

 {
        controlt *c;
        if (!controlfree)
 {
        controlt *c;
        if (!controlfree)


@@ -909,7 +1300,7 @@ static controlt *controlnew(u16 mtype)
        }
        assert(c);
        c->next = 0;
        }
        assert(c);
        c->next = 0;

-       *(u16 *) (c->buf + 0) = htons(0xC802); // flags/ver
+       *(uint16_t *) (c->buf + 0) = htons(0xC802); // flags/ver

        c->length = 12;
        control16(c, 0, mtype, 1);
        return c;
        c->length = 12;
        control16(c, 0, mtype, 1);
        return c;


@@ -919,26 +1310,26 @@ static controlt *controlnew(u16 mtype)
 // (ZLB send).
 static void controlnull(tunnelidt t)
 {
 // (ZLB send).
 static void controlnull(tunnelidt t)
 {

-       u8 buf[12];
+       uint8_t buf[12];

        if (tunnel[t].controlc) // Messages queued; They will carry the ack.
                return;
 
        if (tunnel[t].controlc) // Messages queued; They will carry the ack.
                return;
 

-       *(u16 *) (buf + 0) = htons(0xC802); // flags/ver
-       *(u16 *) (buf + 2) = htons(12); // length
-       *(u16 *) (buf + 4) = htons(tunnel[t].far); // tunnel
-       *(u16 *) (buf + 6) = htons(0); // session
-       *(u16 *) (buf + 8) = htons(tunnel[t].ns); // sequence
-       *(u16 *) (buf + 10) = htons(tunnel[t].nr); // sequence
+       *(uint16_t *) (buf + 0) = htons(0xC802); // flags/ver
+       *(uint16_t *) (buf + 2) = htons(12); // length
+       *(uint16_t *) (buf + 4) = htons(tunnel[t].far); // tunnel
+       *(uint16_t *) (buf + 6) = htons(0); // session
+       *(uint16_t *) (buf + 8) = htons(tunnel[t].ns); // sequence
+       *(uint16_t *) (buf + 10) = htons(tunnel[t].nr); // sequence

        tunnelsend(buf, 12, t);
 }
 
 // add a control message to a tunnel, and send if within window
 static void controladd(controlt * c, tunnelidt t, sessionidt s)
 {
        tunnelsend(buf, 12, t);
 }
 
 // add a control message to a tunnel, and send if within window
 static void controladd(controlt * c, tunnelidt t, sessionidt s)
 {

-       *(u16 *) (c->buf + 2) = htons(c->length); // length
-       *(u16 *) (c->buf + 4) = htons(tunnel[t].far); // tunnel
-       *(u16 *) (c->buf + 6) = htons(s ? session[s].far : 0); // session
-       *(u16 *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
+       *(uint16_t *) (c->buf + 2) = htons(c->length); // length
+       *(uint16_t *) (c->buf + 4) = htons(tunnel[t].far); // tunnel
+       *(uint16_t *) (c->buf + 6) = htons(s ? session[s].far : 0); // session
+       *(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence

        tunnel[t].ns++;              // advance sequence
        // link in message in to queue
        if (tunnel[t].controlc)
        tunnel[t].ns++;              // advance sequence
        // link in message in to queue
        if (tunnel[t].controlc)


@@ -1048,7 +1439,7 @@ void sessionshutdown(sessionidt s, char *reason)
        int walled_garden = session[s].walled_garden;
 
 
        int walled_garden = session[s].walled_garden;
 
 

-       CSTAT(call_sessionshutdown);
+       CSTAT(sessionshutdown);

 
        if (!session[s].tunnel)
        {
 
        if (!session[s].tunnel)
        {


@@ -1063,10 +1454,10 @@ void sessionshutdown(sessionidt s, char *reason)
                run_plugins(PLUGIN_KILL_SESSION, &data);
        }
 
                run_plugins(PLUGIN_KILL_SESSION, &data);
        }
 

-       // RADIUS Stop message

        if (session[s].opened && !walled_garden && !session[s].die)
        {
        if (session[s].opened && !walled_garden && !session[s].die)
        {

-               u16 r = session[s].radius;
+               // RADIUS Stop message
+               uint16_t r = session[s].radius;

                if (!r)
                {
                        if (!(r = radiusnew(s)))
                if (!r)
                {
                        if (!(r = radiusnew(s)))


@@ -1076,13 +1467,16 @@ void sessionshutdown(sessionidt s, char *reason)
                        }
                        else
                        {
                        }
                        else
                        {

-                               int n;
-                               for (n = 0; n < 15; n++)
-                                       radius[r].auth[n] = rand();
+                               random_data(radius[r].auth, sizeof(radius[r].auth));

                        }
                }
                        }
                }

+

                if (r && radius[r].state != RADIUSSTOP)
                        radiussend(r, RADIUSSTOP); // stop, if not already trying
                if (r && radius[r].state != RADIUSSTOP)
                        radiussend(r, RADIUSSTOP); // stop, if not already trying

+
+               // Save counters to dump to accounting file
+               if (*config->accounting_dir && shut_acct_n < sizeof(shut_acct) / sizeof(*shut_acct))
+                       memcpy(&shut_acct[shut_acct_n++], &session[s], sizeof(session[s]));

        }
 
        if (session[s].ip)
        }
 
        if (session[s].ip)


@@ -1106,6 +1500,10 @@ void sessionshutdown(sessionidt s, char *reason)
                }
                else
                        free_ip_address(s);
                }
                else
                        free_ip_address(s);

+
+               // unroute IPv6, if setup
+               if (session[s].flags & SF_IPV6_ROUTED)
+                       route6set(s, session[s].ipv6route, session[s].ipv6prefixlen, 0);

        }
 
        if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.
        }
 
        if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.


@@ -1130,11 +1528,11 @@ void sessionshutdown(sessionidt s, char *reason)
 
 void sendipcp(tunnelidt t, sessionidt s)
 {
 
 void sendipcp(tunnelidt t, sessionidt s)
 {

-       u8 buf[MAXCONTROL];
-       u16 r = session[s].radius;
-       u8 *q;
+       uint8_t buf[MAXCONTROL];
+       uint16_t r = session[s].radius;
+       uint8_t *q;

 
 

-       CSTAT(call_sendipcp);
+       CSTAT(sendipcp);

 
        if (!r)
                r = radiusnew(s);
 
        if (!r)
                r = radiusnew(s);


@@ -1158,22 +1556,46 @@ void sendipcp(tunnelidt t, sessionidt s)
 
        *q = ConfigReq;
        q[1] = r << RADIUS_SHIFT;                    // ID, dont care, we only send one type of request
 
        *q = ConfigReq;
        q[1] = r << RADIUS_SHIFT;                    // ID, dont care, we only send one type of request

-       *(u16 *) (q + 2) = htons(10);
+       *(uint16_t *) (q + 2) = htons(10);

        q[4] = 3;
        q[5] = 6;
        q[4] = 3;
        q[5] = 6;

-       *(u32 *) (q + 6) = config->peer_address ? config->peer_address :
-                          config->bind_address ? config->bind_address :
-                          my_address; // send my IP
+       *(in_addr_t *) (q + 6) = config->peer_address ? config->peer_address :
+                                config->bind_address ? config->bind_address :
+                                my_address; // send my IP

 
        tunnelsend(buf, 10 + (q - buf), t); // send it
        session[s].flags &= ~SF_IPCP_ACKED;     // Clear flag.
 
        tunnelsend(buf, 10 + (q - buf), t); // send it
        session[s].flags &= ~SF_IPCP_ACKED;     // Clear flag.

+
+       // If we have an IPv6 prefix length configured, assume we should
+       // try to negotiate an IPv6 session as well. Unless we've had a
+       // (N)ACK for IPV6CP.
+       if (config->ipv6_prefix.s6_addr[0] > 0 && 
+                       !(session[s].flags & SF_IPV6CP_ACKED) &&
+                       !(session[s].flags & SF_IPV6_NACKED))
+       {
+               q = makeppp(buf,sizeof(buf), 0, 0, t, s, PPPIPV6CP);
+               if (!q) return;
+
+               *q = ConfigReq;
+               q[1] = r << RADIUS_SHIFT;               // ID, don't care, we
+                                                       // only send one type
+                                                       // of request
+               *(uint16_t *) (q + 2) = htons(14);
+               q[4] = 1;
+               q[5] = 10;
+               *(uint32_t *) (q + 6) = 0;              // We'll be prefix::1
+               *(uint32_t *) (q + 10) = 0;
+               q[13] = 1;
+
+               tunnelsend(buf, 14 + (q - buf), t);     // send it
+       }

 }
 
 // kill a session now
 static void sessionkill(sessionidt s, char *reason)
 {
 
 }
 
 // kill a session now
 static void sessionkill(sessionidt s, char *reason)
 {
 

-       CSTAT(call_sessionkill);
+       CSTAT(sessionkill);

 
        session[s].die = now();
        sessionshutdown(s, reason);  // close radius/routes, etc.
 
        session[s].die = now();
        sessionshutdown(s, reason);  // close radius/routes, etc.


@@ -1203,7 +1625,7 @@ static void tunnelkill(tunnelidt t, char *reason)
        sessionidt s;
        controlt *c;
 
        sessionidt s;
        controlt *c;
 

-       CSTAT(call_tunnelkill);
+       CSTAT(tunnelkill);

 
        tunnel[t].state = TUNNELDIE;
 
 
        tunnel[t].state = TUNNELDIE;
 


@@ -1233,7 +1655,7 @@ static void tunnelshutdown(tunnelidt t, char *reason)
 {
        sessionidt s;
 
 {
        sessionidt s;
 

-       CSTAT(call_tunnelshutdown);
+       CSTAT(tunnelshutdown);

 
        if (!tunnel[t].last || !tunnel[t].far || tunnel[t].state == TUNNELFREE)
        {
 
        if (!tunnel[t].last || !tunnel[t].far || tunnel[t].state == TUNNELFREE)
        {


@@ -1261,14 +1683,14 @@ static void tunnelshutdown(tunnelidt t, char *reason)
 }
 
 // read and process packet on tunnel (UDP)
 }
 
 // read and process packet on tunnel (UDP)

-void processudp(u8 * buf, int len, struct sockaddr_in *addr)
+void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)

 {
        char *chapresponse = NULL;
 {
        char *chapresponse = NULL;

-       u16 l = len, t = 0, s = 0, ns = 0, nr = 0;
-       u8 *p = buf + 2;
+       uint16_t l = len, t = 0, s = 0, ns = 0, nr = 0;
+       uint8_t *p = buf + 2;

 
 
 
 

-       CSTAT(call_processudp);
+       CSTAT(processudp);

 
        udp_rx += len;
        udp_rx_pkt++;
 
        udp_rx += len;
        udp_rx_pkt++;


@@ -1289,12 +1711,12 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
        }
        if (*buf & 0x40)
        {                          // length
        }
        if (*buf & 0x40)
        {                          // length

-               l = ntohs(*(u16 *) p);
+               l = ntohs(*(uint16_t *) p);

                p += 2;
        }
                p += 2;
        }

-       t = ntohs(*(u16 *) p);
+       t = ntohs(*(uint16_t *) p);

        p += 2;
        p += 2;

-       s = ntohs(*(u16 *) p);
+       s = ntohs(*(uint16_t *) p);

        p += 2;
        if (s >= MAXSESSION)
        {
        p += 2;
        if (s >= MAXSESSION)
        {


@@ -1310,36 +1732,36 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
        }
        if (*buf & 0x08)
        {                          // ns/nr
        }
        if (*buf & 0x08)
        {                          // ns/nr

-               ns = ntohs(*(u16 *) p);
+               ns = ntohs(*(uint16_t *) p);

                p += 2;
                p += 2;

-               nr = ntohs(*(u16 *) p);
+               nr = ntohs(*(uint16_t *) p);

                p += 2;
        }
        if (*buf & 0x02)
        {                          // offset
                p += 2;
        }
        if (*buf & 0x02)
        {                          // offset

-               u16 o = ntohs(*(u16 *) p);
+               uint16_t o = ntohs(*(uint16_t *) p);

                p += o + 2;
        }
        if ((p - buf) > l)
        {
                p += o + 2;
        }
        if ((p - buf) > l)
        {

-               LOG(1, s, t, "Bad length %d>%d\n", (p - buf), l);
+               LOG(1, s, t, "Bad length %d>%d\n", (int) (p - buf), l);

                STAT(tunnel_rx_errors);
                return;
        }
        l -= (p - buf);
        if (*buf & 0x80)
        {                          // control
                STAT(tunnel_rx_errors);
                return;
        }
        l -= (p - buf);
        if (*buf & 0x80)
        {                          // control

-               u16 message = 0xFFFF; // message type
-               u8 fatal = 0;
-               u8 mandatorymessage = 0;
-               u8 chap = 0;      // if CHAP being used
-               u16 asession = 0;  // assigned session
-               u32 amagic = 0;    // magic number
-               u8 aflags = 0;    // flags from last LCF
-               u16 version = 0x0100; // protocol version (we handle 0.0 as well and send that back just in case)
-               int requestchap = 0;    // do we request PAP instead of original CHAP request?
-               char called[MAXTEL] = ""; // called number
-               char calling[MAXTEL] = ""; // calling number
+               uint16_t message = 0xFFFF;      // message type
+               uint8_t fatal = 0;
+               uint8_t mandatorymessage = 0;
+               uint8_t chap = 0;               // if CHAP being used
+               uint16_t asession = 0;          // assigned session
+               uint32_t amagic = 0;            // magic number
+               uint8_t aflags = 0;             // flags from last LCF
+               uint16_t version = 0x0100;      // protocol version (we handle 0.0 as well and send that back just in case)
+               int requestchap = 0;            // do we request PAP instead of original CHAP request?
+               char called[MAXTEL] = "";       // called number
+               char calling[MAXTEL] = "";      // calling number

 
                if (!config->cluster_iam_master)
                {
 
                if (!config->cluster_iam_master)
                {


@@ -1365,7 +1787,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                        for (i = 1; i <= config->cluster_highest_tunnelid ; ++i)
                        {
                                if (tunnel[i].state != TUNNELOPENING ||
                        for (i = 1; i <= config->cluster_highest_tunnelid ; ++i)
                        {
                                if (tunnel[i].state != TUNNELOPENING ||

-                                       tunnel[i].ip != ntohl(*(ipt *) & addr->sin_addr) ||
+                                       tunnel[i].ip != ntohl(*(in_addr_t *) & addr->sin_addr) ||

                                        tunnel[i].port != ntohs(addr->sin_port) )
                                        continue;
                                t = i;
                                        tunnel[i].port != ntohs(addr->sin_port) )
                                        continue;
                                t = i;


@@ -1387,7 +1809,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                return;
                        }
                        tunnelclear(t);
                                return;
                        }
                        tunnelclear(t);

-                       tunnel[t].ip = ntohl(*(ipt *) & addr->sin_addr);
+                       tunnel[t].ip = ntohl(*(in_addr_t *) & addr->sin_addr);

                        tunnel[t].port = ntohs(addr->sin_port);
                        tunnel[t].window = 4; // default window
                        STAT(tunnel_created);
                        tunnel[t].port = ntohs(addr->sin_port);
                        tunnel[t].window = 4; // default window
                        STAT(tunnel_created);


@@ -1460,10 +1882,10 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                        // process AVPs
                        while (l && !(fatal & 0x80))
                        {
                        // process AVPs
                        while (l && !(fatal & 0x80))
                        {

-                               u16 n = (ntohs(*(u16 *) p) & 0x3FF);
-                               u8 *b = p;
-                               u8 flags = *p;
-                               u16 mtype;
+                               uint16_t n = (ntohs(*(uint16_t *) p) & 0x3FF);
+                               uint8_t *b = p;
+                               uint8_t flags = *p;
+                               uint16_t mtype;

                                p += n;       // next
                                if (l < n)
                                {
                                p += n;       // next
                                if (l < n)
                                {


@@ -1504,48 +1926,43 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                        continue; // next
                                }
                                b += 2;
                                        continue; // next
                                }
                                b += 2;

-                               if (*(u16 *) (b))
+                               if (*(uint16_t *) (b))

                                {
                                {

-                                       LOG(2, s, t, "Unknown AVP vendor %d\n", ntohs(*(u16 *) (b)));
+                                       LOG(2, s, t, "Unknown AVP vendor %d\n", ntohs(*(uint16_t *) (b)));

                                        fatal = flags;
                                        continue; // next
                                }
                                b += 2;
                                        fatal = flags;
                                        continue; // next
                                }
                                b += 2;

-                               mtype = ntohs(*(u16 *) (b));
+                               mtype = ntohs(*(uint16_t *) (b));

                                b += 2;
                                n -= 6;
 
                                b += 2;
                                n -= 6;
 

-                               LOG(4, s, t, "   AVP %d (%s) len %d\n", mtype, avpnames[mtype], n);
+                               LOG(4, s, t, "   AVP %d (%s) len %d\n", mtype, avp_name(mtype), n);

                                switch (mtype)
                                {
                                case 0:     // message type
                                switch (mtype)
                                {
                                case 0:     // message type

-                                       message = ntohs(*(u16 *) b);
-                                       LOG(4, s, t, "   Message type = %d (%s)\n", *b, l2tp_message_types[message]);
+                                       message = ntohs(*(uint16_t *) b);
+                                       LOG(4, s, t, "   Message type = %d (%s)\n", *b, l2tp_message_type(message));

                                        mandatorymessage = flags;
                                        break;
                                case 1:     // result code
                                        {
                                        mandatorymessage = flags;
                                        break;
                                case 1:     // result code
                                        {

-                                               u16 rescode = ntohs(*(u16 *)(b));
+                                               uint16_t rescode = ntohs(*(uint16_t *) b);

                                                const char* resdesc = "(unknown)";
                                                if (message == 4)
                                                { /* StopCCN */
                                                const char* resdesc = "(unknown)";
                                                if (message == 4)
                                                { /* StopCCN */

-                                                       if (rescode <= MAX_STOPCCN_RESULT_CODE)
-                                                               resdesc = stopccn_result_codes[rescode];
+                                                       resdesc = stopccn_result_code(rescode);

                                                }
                                                else if (message == 14)
                                                { /* CDN */
                                                }
                                                else if (message == 14)
                                                { /* CDN */

-                                                       if (rescode <= MAX_CDN_RESULT_CODE)
-                                                               resdesc = cdn_result_codes[rescode];
+                                                       resdesc = cdn_result_code(rescode);

                                                }
 
                                                LOG(4, s, t, "   Result Code %d: %s\n", rescode, resdesc);
                                                if (n >= 4)
                                                {
                                                }
 
                                                LOG(4, s, t, "   Result Code %d: %s\n", rescode, resdesc);
                                                if (n >= 4)
                                                {

-                                                       u16 errcode = ntohs(*(u16 *)(b + 2));
-                                                       const char* errdesc = "(unknown)";
-                                                       if (errcode <= MAX_ERROR_CODE)
-                                                               errdesc = error_codes[errcode];
-                                                       LOG(4, s, t, "   Error Code %d: %s\n", errcode, errdesc);
+                                                       uint16_t errcode = ntohs(*(uint16_t *)(b + 2));
+                                                       LOG(4, s, t, "   Error Code %d: %s\n", errcode, error_code(errcode));

                                                }
                                                if (n > 4)
                                                        LOG(4, s, t, "   Error String: %.*s\n", n-4, b+4);
                                                }
                                                if (n > 4)
                                                        LOG(4, s, t, "   Error String: %.*s\n", n-4, b+4);


@@ -1555,7 +1972,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                        break;
                                case 2:     // protocol version
                                        {
                                        break;
                                case 2:     // protocol version
                                        {

-                                               version = ntohs(*(u16 *) (b));
+                                               version = ntohs(*(uint16_t *) (b));

                                                LOG(4, s, t, "   Protocol version = %d\n", version);
                                                if (version && version != 0x0100)
                                                {   // allow 0.0 and 1.0
                                                LOG(4, s, t, "   Protocol version = %d\n", version);
                                                if (version && version != 0x0100)
                                                {   // allow 0.0 and 1.0


@@ -1590,11 +2007,11 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                        LOG(4, s, t, "   Vendor name = \"%s\"\n", tunnel[t].vendor);
                                        break;
                                case 9:     // assigned tunnel
                                        LOG(4, s, t, "   Vendor name = \"%s\"\n", tunnel[t].vendor);
                                        break;
                                case 9:     // assigned tunnel

-                                       tunnel[t].far = ntohs(*(u16 *) (b));
+                                       tunnel[t].far = ntohs(*(uint16_t *) (b));

                                        LOG(4, s, t, "   Remote tunnel id = %d\n", tunnel[t].far);
                                        break;
                                case 10:    // rx window
                                        LOG(4, s, t, "   Remote tunnel id = %d\n", tunnel[t].far);
                                        break;
                                case 10:    // rx window

-                                       tunnel[t].window = ntohs(*(u16 *) (b));
+                                       tunnel[t].window = ntohs(*(uint16_t *) (b));

                                        if (!tunnel[t].window)
                                                tunnel[t].window = 1; // window of 0 is silly
                                        LOG(4, s, t, "   rx window = %d\n", tunnel[t].window);
                                        if (!tunnel[t].window)
                                                tunnel[t].window = 1; // window of 0 is silly
                                        LOG(4, s, t, "   rx window = %d\n", tunnel[t].window);


@@ -1611,18 +2028,18 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                        break;
 
                                case 14:    // assigned session
                                        break;
 
                                case 14:    // assigned session

-                                       asession = session[s].far = ntohs(*(u16 *) (b));
+                                       asession = session[s].far = ntohs(*(uint16_t *) (b));

                                        LOG(4, s, t, "   assigned session = %d\n", asession);
                                        break;
                                case 15:    // call serial number
                                        LOG(4, s, t, "   assigned session = %d\n", asession);
                                        break;
                                case 15:    // call serial number

-                                       LOG(4, s, t, "   call serial number = %d\n", ntohl(*(u32 *)b));
+                                       LOG(4, s, t, "   call serial number = %d\n", ntohl(*(uint32_t *)b));

                                        break;
                                case 18:    // bearer type
                                        break;
                                case 18:    // bearer type

-                                       LOG(4, s, t, "   bearer type = %d\n", ntohl(*(u32 *)b));
+                                       LOG(4, s, t, "   bearer type = %d\n", ntohl(*(uint32_t *)b));

                                        // TBA - for RADIUS
                                        break;
                                case 19:    // framing type
                                        // TBA - for RADIUS
                                        break;
                                case 19:    // framing type

-                                       LOG(4, s, t, "   framing type = %d\n", ntohl(*(u32 *)b));
+                                       LOG(4, s, t, "   framing type = %d\n", ntohl(*(uint32_t *)b));

                                        // TBA
                                        break;
                                case 21:    // called number
                                        // TBA
                                        break;
                                case 21:    // called number


@@ -1640,7 +2057,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                case 24:    // tx connect speed
                                        if (n == 4)
                                        {
                                case 24:    // tx connect speed
                                        if (n == 4)
                                        {

-                                               session[s].tx_connect_speed = ntohl(*(u32 *)b);
+                                               session[s].tx_connect_speed = ntohl(*(uint32_t *)b);

                                        }
                                        else
                                        {
                                        }
                                        else
                                        {


@@ -1654,7 +2071,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                case 38:    // rx connect speed
                                        if (n == 4)
                                        {
                                case 38:    // rx connect speed
                                        if (n == 4)
                                        {

-                                               session[s].rx_connect_speed = ntohl(*(u32 *)b);
+                                               session[s].rx_connect_speed = ntohl(*(uint32_t *)b);

                                        }
                                        else
                                        {
                                        }
                                        else
                                        {


@@ -1667,15 +2084,15 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                        break;
                                case 25:    // Physical Channel ID
                                        {
                                        break;
                                case 25:    // Physical Channel ID
                                        {

-                                               u32 tmp = ntohl(*(u32 *)b);
+                                               uint32_t tmp = ntohl(*(uint32_t *) b);

                                                LOG(4, s, t, "   Physical Channel ID <%X>\n", tmp);
                                                break;
                                        }
                                case 29:    // Proxy Authentication Type
                                        {
                                                LOG(4, s, t, "   Physical Channel ID <%X>\n", tmp);
                                                break;
                                        }
                                case 29:    // Proxy Authentication Type
                                        {

-                                               u16 authtype = ntohs(*(u16 *)b);
-                                               LOG(4, s, t, "   Proxy Auth Type %d (%s)\n", authtype, authtypes[authtype]);
-                                               requestchap = (authtype == 2);
+                                               uint16_t atype = ntohs(*(uint16_t *)b);
+                                               LOG(4, s, t, "   Proxy Auth Type %d (%s)\n", atype, auth_type(atype));
+                                               requestchap = (atype == 2);

                                                break;
                                        }
                                case 30:    // Proxy Authentication Name
                                                break;
                                        }
                                case 30:    // Proxy Authentication Name


@@ -1694,7 +2111,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                        }
                                case 32:    // Proxy Authentication ID
                                        {
                                        }
                                case 32:    // Proxy Authentication ID
                                        {

-                                               u16 authid = ntohs(*(u16 *)(b));
+                                               uint16_t authid = ntohs(*(uint16_t *)(b));

                                                LOG(4, s, t, "   Proxy Auth ID (%d)\n", authid);
                                                if (session[s].radius)
                                                        radius[session[s].radius].id = authid;
                                                LOG(4, s, t, "   Proxy Auth ID (%d)\n", authid);
                                                if (session[s].radius)
                                                        radius[session[s].radius].id = authid;


@@ -1709,12 +2126,12 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                        }
                                case 27:    // last send lcp
                                        {        // find magic number
                                        }
                                case 27:    // last send lcp
                                        {        // find magic number

-                                               u8 *p = b, *e = p + n;
+                                               uint8_t *p = b, *e = p + n;

                                                while (p + 1 < e && p[1] && p + p[1] <= e)
                                                {
                                                        if (*p == 5 && p[1] == 6) // Magic-Number
                                                while (p + 1 < e && p[1] && p + p[1] <= e)
                                                {
                                                        if (*p == 5 && p[1] == 6) // Magic-Number

-                                                               amagic = ntohl(*(u32 *) (p + 2));
-                                                       else if (*p == 3 && p[1] == 5 && *(u16 *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol
+                                                               amagic = ntohl(*(uint32_t *) (p + 2));
+                                                       else if (*p == 3 && p[1] == 5 && *(uint16_t *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol

                                                                chap = 1;
                                                        else if (*p == 7) // Protocol-Field-Compression
                                                                aflags |= SESSIONPFC;
                                                                chap = 1;
                                                        else if (*p == 7) // Protocol-Field-Compression
                                                                aflags |= SESSIONPFC;


@@ -1792,7 +2209,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                        }
                                        else
                                        {
                                        }
                                        else
                                        {

-                                               u16 r;
+                                               uint16_t r;

                                                controlt *c;
 
                                                s = sessionfree;
                                                controlt *c;
 
                                                s = sessionfree;


@@ -1819,12 +2236,9 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                                LOG(3, s, t, "New session (%d/%d)\n", tunnel[t].far, session[s].far);
                                                control16(c, 14, s, 1); // assigned session
                                                controladd(c, t, s); // send the reply
                                                LOG(3, s, t, "New session (%d/%d)\n", tunnel[t].far, session[s].far);
                                                control16(c, 14, s, 1); // assigned session
                                                controladd(c, t, s); // send the reply

-                                               {
-                                                       // Generate a random challenge
-                                                       int n;
-                                                       for (n = 0; n < 15; n++)
-                                                               radius[r].auth[n] = rand();
-                                               }
+
+                                               // Generate a random challenge
+                                               random_data(radius[r].auth, sizeof(radius[r].auth));

                                                strncpy(radius[r].calling, calling, sizeof(radius[r].calling) - 1);
                                                strncpy(session[s].called, called, sizeof(session[s].called) - 1);
                                                strncpy(session[s].calling, calling, sizeof(session[s].calling) - 1);
                                                strncpy(radius[r].calling, calling, sizeof(radius[r].calling) - 1);
                                                strncpy(session[s].called, called, sizeof(session[s].called) - 1);
                                                strncpy(session[s].calling, calling, sizeof(session[s].calling) - 1);


@@ -1869,7 +2283,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
        }
        else
        {                          // data
        }
        else
        {                          // data

-               u16 prot;
+               uint16_t prot;

 
                LOG_HEX(5, "Receive Tunnel Data", p, l);
                if (l > 2 && p[0] == 0xFF && p[1] == 0x03)
 
                LOG_HEX(5, "Receive Tunnel Data", p, l);
                if (l > 2 && p[0] == 0xFF && p[1] == 0x03)


@@ -1890,7 +2304,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                }
                else
                {
                }
                else
                {

-                       prot = ntohs(*(u16 *) p);
+                       prot = ntohs(*(uint16_t *) p);

                        p += 2;
                        l -= 2;
                }
                        p += 2;
                        l -= 2;
                }


@@ -1936,6 +2350,19 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                        if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
                        processipcp(t, s, p, l);
                }
                        if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
                        processipcp(t, s, p, l);
                }

+               else if (prot == PPPIPV6CP)
+               {
+                       if (config->ipv6_prefix.s6_addr[0] > 0)
+                       {
+                               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; }
+                               processipv6cp(t, s, p, l);
+                       }
+                       else
+                       {
+                               LOG(1, s, t, "IPv6 not configured; ignoring IPv6CP\n");
+                       }
+               }

                else if (prot == PPPCCP)
                {
                        session[s].last_packet = time_now;
                else if (prot == PPPCCP)
                {
                        session[s].last_packet = time_now;


@@ -1959,6 +2386,28 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
 
                        processipin(t, s, p, l);
                }
 
                        processipin(t, s, p, l);
                }

+               else if (prot == PPPIPV6)
+               {
+                       if (!config->ipv6_prefix.s6_addr[0] > 0)
+                       {
+                               LOG(1, s, t, "IPv6 not configured; yet received IPv6 packet. Ignoring.\n");
+                               return;
+                       }
+                       if (session[s].die)
+                       {
+                               LOG(4, s, t, "Session %d is closing.  Don't process PPP packets\n", s);
+                               return;              // closing session, PPP not processed
+                       }
+
+                       session[s].last_packet = time_now;
+                       if (session[s].walled_garden && !config->cluster_iam_master)
+                       {
+                               master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
+                               return;
+                       }
+
+                       processipv6in(t, s, p, l);
+               }

                else
                {
                        STAT(tunnel_rx_errors);
                else
                {
                        STAT(tunnel_rx_errors);


@@ -1968,13 +2417,13 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
 }
 
 // read and process packet on tun
 }
 
 // read and process packet on tun

-static void processtun(u8 * buf, int len)
+static void processtun(uint8_t * buf, int len)

 {
        LOG_HEX(5, "Receive TUN Data", buf, len);
        STAT(tun_rx_packets);
        INC_STAT(tun_rx_bytes, len);
 
 {
        LOG_HEX(5, "Receive TUN Data", buf, len);
        STAT(tun_rx_packets);
        INC_STAT(tun_rx_bytes, len);
 

-       CSTAT(call_processtun);
+       CSTAT(processtun);

 
        eth_rx_pkt++;
        eth_rx += len;
 
        eth_rx_pkt++;
        eth_rx += len;


@@ -1985,8 +2434,12 @@ static void processtun(u8 * buf, int len)
                return;
        }
 
                return;
        }
 

-       if (*(u16 *) (buf + 2) == htons(PKTIP)) // IP
+       if (*(uint16_t *) (buf + 2) == htons(PKTIP)) // IPv4

                processipout(buf, len);
                processipout(buf, len);

+       else if (*(uint16_t *) (buf + 2) == htons(PKTIPV6) // IPV6
+           && config->ipv6_prefix.s6_addr[0] > 0)
+               processipv6out(buf, len);
+

        // Else discard.
 }
 
        // Else discard.
 }
 


@@ -2001,8 +2454,9 @@ static int regular_cleanups(void)
        static sessionidt s = 0;        // Next session to check for actions on.
        tunnelidt t;
        int count=0,i;
        static sessionidt s = 0;        // Next session to check for actions on.
        tunnelidt t;
        int count=0,i;

-       u16 r;
+       uint16_t r;

        static clockt next_acct = 0;
        static clockt next_acct = 0;

+       static clockt next_shut_acct = 0;

        int a;
 
        LOG(3, 0, 0, "Begin regular cleanup\n");
        int a;
 
        LOG(3, 0, 0, "Begin regular cleanup\n");


@@ -2034,7 +2488,7 @@ static int regular_cleanups(void)
                        if (tunnel[t].retry <= TIME)
                        {
                                controlt *c = tunnel[t].controls;
                        if (tunnel[t].retry <= TIME)
                        {
                                controlt *c = tunnel[t].controls;

-                               u8 w = tunnel[t].window;
+                               uint8_t w = tunnel[t].window;

                                tunnel[t].try++; // another try
                                if (tunnel[t].try > 5)
                                        tunnelkill(t, "Timeout on control message"); // game over
                                tunnel[t].try++; // another try
                                if (tunnel[t].try > 5)
                                        tunnelkill(t, "Timeout on control message"); // game over


@@ -2095,7 +2549,7 @@ static int regular_cleanups(void)
                // Drop sessions who have not responded within IDLE_TIMEOUT seconds
                if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
                {
                // Drop sessions who have not responded within IDLE_TIMEOUT seconds
                if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
                {

-                       sessionkill(s, "No response to LCP ECHO requests");
+                       sessionshutdown(s, "No response to LCP ECHO requests");

                        STAT(session_timeout);
                        if (++count >= MAX_ACTIONS) break;
                        continue;
                        STAT(session_timeout);
                        if (++count >= MAX_ACTIONS) break;
                        continue;


@@ -2104,15 +2558,15 @@ static int regular_cleanups(void)
                // No data in IDLE_TIMEOUT seconds, send LCP ECHO
                if (session[s].user[0] && (time_now - session[s].last_packet >= ECHO_TIMEOUT))
                {
                // No data in IDLE_TIMEOUT seconds, send LCP ECHO
                if (session[s].user[0] && (time_now - session[s].last_packet >= ECHO_TIMEOUT))
                {

-                       u8 b[MAXCONTROL] = {0};
+                       uint8_t b[MAXCONTROL] = {0};

 
 

-                       u8 *q = makeppp(b, sizeof(b), 0, 0, session[s].tunnel, s, PPPLCP);
+                       uint8_t *q = makeppp(b, sizeof(b), 0, 0, session[s].tunnel, s, PPPLCP);

                        if (!q) continue;
 
                        *q = EchoReq;
                        if (!q) continue;
 
                        *q = EchoReq;

-                       *(u8 *)(q + 1) = (time_now % 255); // ID
-                       *(u16 *)(q + 2) = htons(8); // Length
-                       *(u32 *)(q + 4) = 0; // Magic Number (not supported)
+                       *(uint8_t *)(q + 1) = (time_now % 255); // ID
+                       *(uint16_t *)(q + 2) = htons(8); // Length
+                       *(uint32_t *)(q + 4) = 0; // Magic Number (not supported)

 
                        LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
                                        (int)(time_now - session[s].last_packet));
 
                        LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
                                        (int)(time_now - session[s].last_packet));


@@ -2190,11 +2644,22 @@ static int regular_cleanups(void)
                }
        }
 
                }
        }
 

-       if (*config->accounting_dir && next_acct <= TIME)
+       if (*config->accounting_dir)

        {
        {

-               // Dump accounting data
-               next_acct = TIME + ACCT_TIME;
-               dump_acct_info();
+               if (next_acct <= TIME)
+               {
+                       // Dump accounting data
+                       next_acct = TIME + ACCT_TIME;
+                       next_shut_acct = TIME + ACCT_SHUT_TIME;
+                       dump_acct_info(1);
+               }
+               else if (next_shut_acct <= TIME)
+               {
+                       // Dump accounting data for shutdown sessions
+                       next_shut_acct = TIME + ACCT_SHUT_TIME;
+                       if (shut_acct_n)
+                               dump_acct_info(0);
+               }

        }
 
        if (count >= MAX_ACTIONS)
        }
 
        if (count >= MAX_ACTIONS)


@@ -2262,7 +2727,7 @@ static int readset_n = 0;
 static void mainloop(void)
 {
        int i;
 static void mainloop(void)
 {
        int i;

-       u8 buf[65536];
+       uint8_t buf[65536];

        struct timeval to;
        clockt next_cluster_ping = 0;   // send initial ping immediately
        time_t next_clean = time_now + config->cleanup_interval;
        struct timeval to;
        clockt next_cluster_ping = 0;   // send initial ping immediately
        time_t next_clean = time_now + config->cleanup_interval;


@@ -2326,6 +2791,8 @@ static void mainloop(void)
                n = select(n + 1, &r, 0, 0, &to);
 #endif /* BGP */
 
                n = select(n + 1, &r, 0, 0, &to);
 #endif /* BGP */
 

+               STAT(select_called);
+

                TIME = now();
                if (n < 0)
                {
                TIME = now();
                if (n < 0)
                {


@@ -2341,6 +2808,9 @@ static void mainloop(void)
                {
                        struct sockaddr_in addr;
                        int alen, c, s;
                {
                        struct sockaddr_in addr;
                        int alen, c, s;

+                       int udp_pkts = 0;
+                       int tun_pkts = 0;
+                       int cluster_pkts = 0;

 
                        // nsctl commands
                        if (FD_ISSET(controlfd, &r))
 
                        // nsctl commands
                        if (FD_ISSET(controlfd, &r))


@@ -2400,6 +2870,7 @@ static void mainloop(void)
                                        if ((s = recvfrom(udpfd, buf, sizeof(buf), 0, (void *) &addr, &alen)) > 0)
                                        {
                                                processudp(buf, s, &addr);
                                        if ((s = recvfrom(udpfd, buf, sizeof(buf), 0, (void *) &addr, &alen)) > 0)
                                        {
                                                processudp(buf, s, &addr);

+                                               udp_pkts++;

                                        }
                                        else
                                        {
                                        }
                                        else
                                        {


@@ -2411,9 +2882,10 @@ static void mainloop(void)
                                // incoming IP
                                if (FD_ISSET(tunfd, &r))
                                {
                                // incoming IP
                                if (FD_ISSET(tunfd, &r))
                                {

-                                       if ((n = read(tunfd, buf, sizeof(buf))) > 0)
+                                       if ((s = read(tunfd, buf, sizeof(buf))) > 0)

                                        {
                                        {

-                                               processtun(buf, n);
+                                               processtun(buf, s);
+                                               tun_pkts++;

                                        }
                                        else
                                        {
                                        }
                                        else
                                        {


@@ -2429,6 +2901,7 @@ static void mainloop(void)
                                        if ((s = recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen)) > 0)
                                        {
                                                processcluster(buf, s, addr.sin_addr.s_addr);
                                        if ((s = recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen)) > 0)
                                        {
                                                processcluster(buf, s, addr.sin_addr.s_addr);

+                                               cluster_pkts++;

                                        }
                                        else
                                        {
                                        }
                                        else
                                        {


@@ -2437,6 +2910,17 @@ static void mainloop(void)
                                        }
                                }
                        }
                                        }
                                }
                        }

+
+                       if (udp_pkts > 1 || tun_pkts > 1 || cluster_pkts > 1)
+                               STAT(multi_read_used);
+
+                       if (c >= config->multi_read_count)
+                       {
+                               LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster packets\n",
+                                       config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
+
+                               STAT(multi_read_exceeded);
+                       }

                }
 
                        // Runs on every machine (master and slaves).
                }
 
                        // Runs on every machine (master and slaves).


@@ -2586,6 +3070,7 @@ static void initdata(int optdebug, char *optconfig)
        config->debug = optdebug;
        config->num_tbfs = MAXTBFS;
        config->rl_rate = 28; // 28kbps
        config->debug = optdebug;
        config->num_tbfs = MAXTBFS;
        config->rl_rate = 28; // 28kbps

+       strcpy(config->random_device, RANDOMDEVICE);

 
        if (!(tunnel = shared_malloc(sizeof(tunnelt) * MAXTUNNEL)))
        {
 
        if (!(tunnel = shared_malloc(sizeof(tunnelt) * MAXTUNNEL)))
        {


@@ -2598,9 +3083,9 @@ static void initdata(int optdebug, char *optconfig)
                exit(1);
        }
 
                exit(1);
        }
 

-       if (!(sess_count = shared_malloc(sizeof(sessioncountt) * MAXSESSION)))
+       if (!(sess_local = shared_malloc(sizeof(sessionlocalt) * MAXSESSION)))

        {
        {

-               LOG(0, 0, 0, "Error doing malloc for sessions_count: %s\n", strerror(errno));
+               LOG(0, 0, 0, "Error doing malloc for sess_local: %s\n", strerror(errno));

                exit(1);
        }
 
                exit(1);
        }
 


@@ -2616,12 +3101,12 @@ static void initdata(int optdebug, char *optconfig)
                exit(1);
        }
 
                exit(1);
        }
 

-if (!(ip_filters = shared_malloc(sizeof(ip_filtert) * MAXFILTER)))
-{
-       LOG(0, 0, 0, "Error doing malloc for ip_filters: %s\n", strerror(errno));
-       exit(1);
-}
-memset(ip_filters, 0, sizeof(ip_filtert) * MAXFILTER);
+       if (!(ip_filters = shared_malloc(sizeof(ip_filtert) * MAXFILTER)))
+       {
+               LOG(0, 0, 0, "Error doing malloc for ip_filters: %s\n", strerror(errno));
+               exit(1);
+       }
+       memset(ip_filters, 0, sizeof(ip_filtert) * MAXFILTER);

 
 #ifdef RINGBUFFER
        if (!(ringbuffer = shared_malloc(sizeof(struct Tringbuffer))))
 
 #ifdef RINGBUFFER
        if (!(ringbuffer = shared_malloc(sizeof(struct Tringbuffer))))


@@ -2684,14 +3169,14 @@ memset(ip_filters, 0, sizeof(ip_filtert) * MAXFILTER);
 
 static int assign_ip_address(sessionidt s)
 {
 
 static int assign_ip_address(sessionidt s)
 {

-       u32 i;
+       uint32_t i;

        int best = -1;
        time_t best_time = time_now;
        char *u = session[s].user;
        char reuse = 0;
 
 
        int best = -1;
        time_t best_time = time_now;
        char *u = session[s].user;
        char reuse = 0;
 
 

-       CSTAT(call_assign_ip_address);
+       CSTAT(assign_ip_address);

 
        for (i = 1; i < ip_pool_size; i++)
        {
 
        for (i = 1; i < ip_pool_size; i++)
        {


@@ -2744,7 +3229,7 @@ static void free_ip_address(sessionidt s)
        int i = session[s].ip_pool_index;
 
 
        int i = session[s].ip_pool_index;
 
 

-       CSTAT(call_free_ip_address);
+       CSTAT(free_ip_address);

 
        if (!session[s].ip)
                return; // what the?
 
        if (!session[s].ip)
                return; // what the?


@@ -2845,7 +3330,7 @@ static void fix_address_pool(int sid)
 //
 // Add a block of addresses to the IP pool to hand out.
 //
 //
 // Add a block of addresses to the IP pool to hand out.
 //

-static void add_to_ip_pool(u32 addr, u32 mask)
+static void add_to_ip_pool(in_addr_t addr, in_addr_t mask)

 {
        int i;
        if (mask == 0)
 {
        int i;
        if (mask == 0)


@@ -2896,7 +3381,7 @@ static void initippool()
                if ((p = (char *)strrchr(buf, '\n'))) *p = 0;
                if ((p = (char *)strchr(buf, ':')))
                {
                if ((p = (char *)strrchr(buf, '\n'))) *p = 0;
                if ((p = (char *)strchr(buf, ':')))
                {

-                       ipt src;
+                       in_addr_t src;

                        *p = '\0';
                        src = inet_addr(buf);
                        if (src == INADDR_NONE)
                        *p = '\0';
                        src = inet_addr(buf);
                        if (src == INADDR_NONE)


@@ -2914,7 +3399,7 @@ static void initippool()
                {
                        // It's a range
                        int numbits = 0;
                {
                        // It's a range
                        int numbits = 0;

-                       u32 start = 0, mask = 0;
+                       in_addr_t start = 0, mask = 0;

 
                        LOG(2, 0, 0, "Adding IP address range %s\n", buf);
                        *p++ = 0;
 
                        LOG(2, 0, 0, "Adding IP address range %s\n", buf);
                        *p++ = 0;


@@ -2924,7 +3409,7 @@ static void initippool()
                                continue;
                        }
                        start = ntohl(inet_addr(pool));
                                continue;
                        }
                        start = ntohl(inet_addr(pool));

-                       mask = (u32)(pow(2, numbits) - 1) << (32 - numbits);
+                       mask = (in_addr_t) (pow(2, numbits) - 1) << (32 - numbits);

 
                        // Add a static route for this pool
                        LOG(5, 0, 0, "Adding route for address pool %s/%u\n",
 
                        // Add a static route for this pool
                        LOG(5, 0, 0, "Adding route for address pool %s/%u\n",


@@ -2944,7 +3429,7 @@ static void initippool()
        LOG(1, 0, 0, "IP address pool is %d addresses\n", ip_pool_size - 1);
 }
 
        LOG(1, 0, 0, "IP address pool is %d addresses\n", ip_pool_size - 1);
 }
 

-void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port)
+void snoop_send_packet(char *packet, uint16_t size, in_addr_t destination, uint16_t port)

 {
        struct sockaddr_in snoop_addr = {0};
        if (!destination || !port || snoopfd <= 0 || size <= 0 || !packet)
 {
        struct sockaddr_in snoop_addr = {0};
        if (!destination || !port || snoopfd <= 0 || size <= 0 || !packet)


@@ -2954,8 +3439,8 @@ void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port)
        snoop_addr.sin_addr.s_addr = destination;
        snoop_addr.sin_port = ntohs(port);
 
        snoop_addr.sin_addr.s_addr = destination;
        snoop_addr.sin_port = ntohs(port);
 

-       LOG(5, 0, 0, "Snooping packet at %p (%d bytes) to %s:%d\n",
-               packet, size, fmtaddr(snoop_addr.sin_addr.s_addr, 0),
+       LOG(5, 0, 0, "Snooping %d byte packet to %s:%d\n", size,
+               fmtaddr(snoop_addr.sin_addr.s_addr, 0),

                htons(snoop_addr.sin_port));
 
        if (sendto(snoopfd, packet, size, MSG_DONTWAIT | MSG_NOSIGNAL, (void *) &snoop_addr, sizeof(snoop_addr)) < 0)
                htons(snoop_addr.sin_port));
 
        if (sendto(snoopfd, packet, size, MSG_DONTWAIT | MSG_NOSIGNAL, (void *) &snoop_addr, sizeof(snoop_addr)) < 0)


@@ -2964,55 +3449,71 @@ void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port)
        STAT(packets_snooped);
 }
 
        STAT(packets_snooped);
 }
 

-static void dump_acct_info()
+static int dump_session(FILE **f, sessiont *s)

 {
 {

-       char filename[1024];
-       char timestr[64];
-       time_t t = time(NULL);
-       int i;
-       FILE *f = NULL;
-
+       if (!s->opened || !s->ip || !(s->cin || s->cout) || !*s->user || s->walled_garden)
+               return 1;

 
 

-       CSTAT(call_dump_acct_info);
+       if (!*f)
+       {
+               char filename[1024];
+               char timestr[64];
+               time_t now = time(NULL);

 
 

-       strftime(timestr, 64, "%Y%m%d%H%M%S", localtime(&t));
-       snprintf(filename, 1024, "%s/%s", config->accounting_dir, timestr);
+               strftime(timestr, sizeof(timestr), "%Y%m%d%H%M%S", localtime(&now));
+               snprintf(filename, sizeof(filename), "%s/%s", config->accounting_dir, timestr);

 
 

-       for (i = 0; i < MAXSESSION; i++)
-       {
-               if (!session[i].opened || !session[i].ip || !(session[i].cin || session[i].cout) || !*session[i].user || session[i].walled_garden)
-                       continue;
-               if (!f)
+               if (!(*f = fopen(filename, "w")))

                {
                {

-                       time_t now = time(NULL);
-                       if (!(f = fopen(filename, "w")))
-                       {
-                               LOG(0, 0, 0, "Can't write accounting info to %s: %s\n", filename, strerror(errno));
-                               return ;
-                       }
-                       LOG(3, 0, 0, "Dumping accounting information to %s\n", filename);
-                       fprintf(f, "# dslwatch.pl dump file V1.01\n"
-                               "# host: %s\n"
-                               "# time: %ld\n"
-                               "# uptime: %ld\n"
-                               "# format: username ip qos uptxoctets downrxoctets\n",
-                               hostname,
-                               now,
-                               now - basetime);
+                       LOG(0, 0, 0, "Can't write accounting info to %s: %s\n", filename, strerror(errno));
+                       return 0;

                }
 
                }
 

-               LOG(4, 0, 0, "Dumping accounting information for %s\n", session[i].user);
-               fprintf(f, "%s %s %d %u %u\n",
-                       session[i].user,                                                // username
-                       fmtaddr(htonl(session[i].ip), 0),                               // ip
-                       (session[i].throttle_in || session[i].throttle_out) ? 2 : 1,    // qos
-                       (u32)session[i].cin,                                            // uptxoctets
-                       (u32)session[i].cout);                                          // downrxoctets
+               LOG(3, 0, 0, "Dumping accounting information to %s\n", filename);
+               fprintf(*f, "# dslwatch.pl dump file V1.01\n"
+                       "# host: %s\n"
+                       "# time: %ld\n"
+                       "# uptime: %ld\n"
+                       "# format: username ip qos uptxoctets downrxoctets\n",
+                       hostname,
+                       now,
+                       now - basetime);
+       }
+
+       LOG(4, 0, 0, "Dumping accounting information for %s\n", s->user);
+       fprintf(*f, "%s %s %d %u %u\n",
+               s->user,                                                // username
+               fmtaddr(htonl(s->ip), 0),                               // ip
+               (s->throttle_in || s->throttle_out) ? 2 : 1,            // qos
+               (uint32_t) s->cin,                                      // uptxoctets
+               (uint32_t) s->cout);                                    // downrxoctets
+
+       s->pin = s->cin = 0;
+       s->pout = s->cout = 0;
+
+       return 1;
+}
+
+static void dump_acct_info(int all)
+{
+       int i;
+       FILE *f = NULL;
+

 
 

-               session[i].pin = session[i].cin = 0;
-               session[i].pout = session[i].cout = 0;
+       CSTAT(dump_acct_info);
+
+       if (shut_acct_n)
+       {
+               for (i = 0; i < shut_acct_n; i++)
+                       dump_session(&f, &shut_acct[i]);
+
+               shut_acct_n = 0;

        }
 
        }
 

+       if (all)
+               for (i = 1; i <= config->cluster_highest_sessionid; i++)
+                       dump_session(&f, &session[i]);
+

        if (f)
                fclose(f);
 }
        if (f)
                fclose(f);
 }


@@ -3073,7 +3574,7 @@ int main(int argc, char *argv[])
        init_tbf(config->num_tbfs);
 
        LOG(0, 0, 0, "L2TPNS version " VERSION "\n");
        init_tbf(config->num_tbfs);
 
        LOG(0, 0, 0, "L2TPNS version " VERSION "\n");

-       LOG(0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n");
+       LOG(0, 0, 0, "Copyright (c) 2003, 2004, 2005 Optus Internet Engineering\n");

        LOG(0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
        {
                struct rlimit rlim;
        LOG(0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
        {
                struct rlimit rlim;


@@ -3240,15 +3741,19 @@ static void sigquit_handler(int sig)
        int i;
 
        LOG(1, 0, 0, "Shutting down without saving sessions\n");
        int i;
 
        LOG(1, 0, 0, "Shutting down without saving sessions\n");

-       for (i = 1; i < MAXSESSION; i++)
-       {
-               if (session[i].opened)
-                       sessionkill(i, "L2TPNS Closing");
-       }
-       for (i = 1; i < MAXTUNNEL; i++)
+
+       if (config->cluster_iam_master)

        {
        {

-               if (tunnel[i].ip || tunnel[i].state)
-                       tunnelshutdown(i, "L2TPNS Closing");
+               for (i = 1; i < MAXSESSION; i++)
+               {
+                       if (session[i].opened)
+                               sessionkill(i, "L2TPNS Closing");
+               }
+               for (i = 1; i < MAXTUNNEL; i++)
+               {
+                       if (tunnel[i].ip || tunnel[i].state)
+                               tunnelshutdown(i, "L2TPNS Closing");
+               }

        }
 
        main_quit++;
        }
 
        main_quit++;


@@ -3267,7 +3772,7 @@ static void read_state()
        ippoolt itmp;
        FILE *f;
        char magic[sizeof(DUMP_MAGIC) - 1];
        ippoolt itmp;
        FILE *f;
        char magic[sizeof(DUMP_MAGIC) - 1];

-       u32 buf[2];
+       uint32_t buf[2];

 
        if (!config->save_state)
        {
 
        if (!config->save_state)
        {


@@ -3388,7 +3893,7 @@ static void read_state()
 static void dump_state()
 {
        FILE *f;
 static void dump_state()
 {
        FILE *f;

-       u32 buf[2];
+       uint32_t buf[2];

 
        if (!config->save_state)
                return;
 
        if (!config->save_state)
                return;


@@ -3436,7 +3941,7 @@ static void dump_state()
        unlink(STATEFILE);
 }
 
        unlink(STATEFILE);
 }
 

-static void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response)
+static void build_chap_response(char *challenge, uint8_t id, uint16_t challenge_length, char **challenge_response)

 {
        MD5_CTX ctx;
        *challenge_response = NULL;
 {
        MD5_CTX ctx;
        *challenge_response = NULL;


@@ -3474,6 +3979,7 @@ static int facility_value(char *name)
 static void update_config()
 {
        int i;
 static void update_config()
 {
        int i;

+       char *p;

        static int timeout = 0;
        static int interval = 0;
 
        static int timeout = 0;
        static int interval = 0;
 


@@ -3485,6 +3991,7 @@ static void update_config()
                fclose(log_stream);
                log_stream = NULL;
        }
                fclose(log_stream);
                log_stream = NULL;
        }

+

        if (*config->log_filename)
        {
                if (strstr(config->log_filename, "syslog:") == config->log_filename)
        if (*config->log_filename)
        {
                if (strstr(config->log_filename, "syslog:") == config->log_filename)


@@ -3516,7 +4023,6 @@ static void update_config()
                setbuf(log_stream, NULL);
        }
 
                setbuf(log_stream, NULL);
        }
 

-

        // Update radius
        config->numradiusservers = 0;
        for (i = 0; i < MAXRADSERVER; i++)
        // Update radius
        config->numradiusservers = 0;
        for (i = 0; i < MAXRADSERVER; i++)


@@ -3541,6 +4047,59 @@ static void update_config()
 
        config->num_radfds = 2 << RADIUS_SHIFT;
 
 
        config->num_radfds = 2 << RADIUS_SHIFT;
 

+       // parse radius_authtypes_s
+       config->radius_authtypes = config->radius_authprefer = 0;
+       p = config->radius_authtypes_s;
+       while (*p)
+       {
+               char *s = strpbrk(p, " \t,");
+               int type = 0;
+
+               if (s)
+               {
+                       *s++ = 0;
+                       while (*s == ' ' || *s == '\t')
+                               s++;
+
+                       if (!*s)
+                               s = 0;
+               }
+
+               if (!strncasecmp("chap", p, strlen(p)))
+                       type = AUTHCHAP;
+               else if (!strncasecmp("pap", p, strlen(p)))
+                       type = AUTHPAP;
+               else
+                       LOG(0, 0, 0, "Invalid RADIUS authentication type \"%s\"", p);
+
+               config->radius_authtypes |= type;
+               if (!config->radius_authprefer)
+                       config->radius_authprefer = type;
+       }
+
+       if (!config->radius_authtypes)
+       {
+               LOG(0, 0, 0, "Defaulting to PAP authentication\n");
+               config->radius_authtypes = config->radius_authprefer = AUTHPAP;
+       }
+
+       // normalise radius_authtypes_s
+       if (config->radius_authprefer == AUTHPAP)
+       {
+               strcpy(config->radius_authtypes_s, "pap");
+               if (config->radius_authtypes & AUTHCHAP)
+                       strcat(config->radius_authtypes_s, ", chap");
+       }
+       else
+       {
+               strcpy(config->radius_authtypes_s, "chap");
+               if (config->radius_authtypes & AUTHPAP)
+                       strcat(config->radius_authtypes_s, ", pap");
+       }
+
+       // re-initialise the random number source
+       initrandom(config->random_device);
+

        // Update plugins
        for (i = 0; i < MAXPLUGINS; i++)
        {
        // Update plugins
        for (i = 0; i < MAXPLUGINS; i++)
        {


@@ -3558,6 +4117,7 @@ static void update_config()
                        remove_plugin(config->old_plugins[i]);
                }
        }
                        remove_plugin(config->old_plugins[i]);
                }
        }

+

        memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
        if (!config->cleanup_interval) config->cleanup_interval = 10;
        if (!config->multi_read_count) config->multi_read_count = 10;
        memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
        if (!config->cleanup_interval) config->cleanup_interval = 10;
        if (!config->multi_read_count) config->multi_read_count = 10;


@@ -3631,12 +4191,12 @@ static void read_config_file()
 int sessionsetup(tunnelidt t, sessionidt s)
 {
        // A session now exists, set it up
 int sessionsetup(tunnelidt t, sessionidt s)
 {
        // A session now exists, set it up

-       ipt ip;
+       in_addr_t ip;

        char *user;
        sessionidt i;
        int r;
 
        char *user;
        sessionidt i;
        int r;
 

-       CSTAT(call_sessionsetup);
+       CSTAT(sessionsetup);

 
        LOG(3, s, t, "Doing session setup for session\n");
 
 
        LOG(3, s, t, "Doing session setup for session\n");
 


@@ -3689,6 +4249,7 @@ int sessionsetup(tunnelidt t, sessionidt s)
                // convered by a Framed-Route.  Anything else is part
                // of the IP address pool and is already routed, it
                // just needs to be added to the IP cache.
                // convered by a Framed-Route.  Anything else is part
                // of the IP address pool and is already routed, it
                // just needs to be added to the IP cache.

+               // IPv6 route setup is done in ppp.c, when IPV6CP is acked.

                if (session[s].ip_pool_index == -1) // static ip
                {
                        if (!routed) routeset(s, session[s].ip, 0, 0, 1);
                if (session[s].ip_pool_index == -1) // static ip
                {
                        if (!routed) routeset(s, session[s].ip, 0, 0, 1);


@@ -3811,6 +4372,10 @@ int load_session(sessionidt s, sessiont *new)
                }
        }
 
                }
        }
 

+       // check v6 routing
+       if (new->flags & SF_IPV6_ROUTED && !(session[s].flags & SF_IPV6_ROUTED))
+                   route6set(s, new->ipv6route, new->ipv6prefixlen, 1);
+

        // check filters
        if (new->filter_in && (new->filter_in > MAXFILTER || !ip_filters[new->filter_in - 1].name[0]))
        {
        // check filters
        if (new->filter_in && (new->filter_in > MAXFILTER || !ip_filters[new->filter_in - 1].name[0]))
        {


@@ -3840,8 +4405,8 @@ int load_session(sessionidt s, sessiont *new)
                                        // for walking the sessions to forward byte counts to the master.
                config->cluster_highest_sessionid = s;
 
                                        // for walking the sessions to forward byte counts to the master.
                config->cluster_highest_sessionid = s;
 

-       // TEMP: old session struct used a u32 to define the throttle
-       // speed for both up/down, new uses a u16 for each.  Deal with
+       // TEMP: old session struct used a uint32_t to define the throttle
+       // speed for both up/down, new uses a uint16_t for each.  Deal with

        // sessions from an old master for migration.
        if (new->throttle_out == 0 && new->tbf_out)
                new->throttle_out = new->throttle_in;
        // sessions from an old master for migration.
        if (new->throttle_out == 0 && new->tbf_out)
                new->throttle_out = new->throttle_in;


@@ -4030,7 +4595,7 @@ static void plugins_done()
                run_plugin_done(p);
 }
 
                run_plugin_done(p);
 }
 

-static void processcontrol(u8 * buf, int len, struct sockaddr_in *addr, int alen)
+static void processcontrol(uint8_t * buf, int len, struct sockaddr_in *addr, int alen)

 {
        struct nsctl request;
        struct nsctl response;
 {
        struct nsctl request;
        struct nsctl response;


@@ -4342,16 +4907,16 @@ int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc
  *
  * Based on code from rp-l2tpd by Roaring Penguin Software Inc.
  */
  *
  * Based on code from rp-l2tpd by Roaring Penguin Software Inc.
  */

-static int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length)
+static int unhide_avp(uint8_t *avp, tunnelidt t, sessionidt s, uint16_t length)

 {
        MD5_CTX ctx;
 {
        MD5_CTX ctx;

-       u8 *cursor;
-       u8 digest[16];
-       u8 working_vector[16];
+       uint8_t *cursor;
+       uint8_t digest[16];
+       uint8_t working_vector[16];

        uint16_t hidden_length;
        uint16_t hidden_length;

-       u8 type[2];
+       uint8_t type[2];

        size_t done, todo;
        size_t done, todo;

-       u8 *output;
+       uint8_t *output;

 
        // Find the AVP type.
        type[0] = *(avp + 4);
 
        // Find the AVP type.
        type[0] = *(avp + 4);


@@ -4406,7 +4971,7 @@ static int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length)
        return hidden_length + 6;
 }
 
        return hidden_length + 6;
 }
 

-static int ip_filter_port(ip_filter_portt *p, portt port)
+static int ip_filter_port(ip_filter_portt *p, uint16_t port)

 {
        switch (p->op)
        {
 {
        switch (p->op)
        {


@@ -4420,7 +4985,7 @@ static int ip_filter_port(ip_filter_portt *p, portt port)
        return 0;
 }
 
        return 0;
 }
 

-static int ip_filter_flag(u8 op, u8 sflags, u8 cflags, u8 flags)
+static int ip_filter_flag(uint8_t op, uint8_t sflags, uint8_t cflags, uint8_t flags)

 {
        switch (op)
        {
 {
        switch (op)
        {


@@ -4437,15 +5002,15 @@ static int ip_filter_flag(u8 op, u8 sflags, u8 cflags, u8 flags)
        return 0;
 }
 
        return 0;
 }
 

-int ip_filter(u8 *buf, int len, u8 filter)
+int ip_filter(uint8_t *buf, int len, uint8_t filter)

 {
 {

-       u16 frag_offset;
-       u8 proto;
-       ipt src_ip;
-       ipt dst_ip;
-       portt src_port = 0;
-       portt dst_port = 0;
-       u8 flags = 0;
+       uint16_t frag_offset;
+       uint8_t proto;
+       in_addr_t src_ip;
+       in_addr_t dst_ip;
+       uint16_t src_port = 0;
+       uint16_t dst_port = 0;
+       uint8_t flags = 0;

        ip_filter_rulet *rule;
 
        if (len < 20) // up to end of destination address
        ip_filter_rulet *rule;
 
        if (len < 20) // up to end of destination address


@@ -4454,10 +5019,10 @@ int ip_filter(u8 *buf, int len, u8 filter)
        if ((*buf >> 4) != 4) // IPv4
                return 0;
 
        if ((*buf >> 4) != 4) // IPv4
                return 0;
 

-       frag_offset = ntohs(*(u16 *) (buf + 6)) & 0x1fff;
+       frag_offset = ntohs(*(uint16_t *) (buf + 6)) & 0x1fff;

        proto = buf[9];
        proto = buf[9];

-       src_ip = *(u32 *) (buf + 12);
-       dst_ip = *(u32 *) (buf + 16);
+       src_ip = *(in_addr_t *) (buf + 12);
+       dst_ip = *(in_addr_t *) (buf + 16);

 
        if (frag_offset == 0 && (proto == IPPROTO_TCP || proto == IPPROTO_UDP))
        {
 
        if (frag_offset == 0 && (proto == IPPROTO_TCP || proto == IPPROTO_UDP))
        {


@@ -4465,8 +5030,8 @@ int ip_filter(u8 *buf, int len, u8 filter)
                if (len < l + 4) // ports
                        return 0;
 
                if (len < l + 4) // ports
                        return 0;
 

-               src_port = ntohs(*(u16 *) (buf + l));
-               dst_port = ntohs(*(u16 *) (buf + l + 2));
+               src_port = ntohs(*(uint16_t *) (buf + l));
+               dst_port = ntohs(*(uint16_t *) (buf + l + 2));

                if (proto == IPPROTO_TCP)
                {
                        if (len < l + 14) // flags
                if (proto == IPPROTO_TCP)
                {
                        if (len < l + 14) // flags