// L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.47 2004-12-16 08:49:53 bodea Exp $
+// $Id: l2tpns.h,v 1.53 2005-01-13 07:57:39 bodea Exp $
#ifndef __L2TPNS_H__
#define __L2TPNS_H__
#include <sys/types.h>
#include <libcli.h>
-#define VERSION "2.0.13"
+#define VERSION "2.1.0"
// Limits
#define MAXTUNNEL 500 // could be up to 65535
#endif
#define TUNDEVICE "/dev/net/tun"
+#define RANDOMDEVICE "/dev/urandom" // default, not as secure as /dev/random but non-blocking
#define STATEFILE DATADIR "/state.dump" // State dump file
#define CONFIGFILE FLASHDIR "/startup-config" // Configuration file
#define CLIUSERS FLASHDIR "/users" // CLI Users file
#define L2TPPORT 1701 // L2TP port
#define RADPORT 1645 // old radius port...
#define PKTARP 0x0806 // ARP packet type
-#define PKTIP 0x0800 // IP packet type
-#define PSEUDOMAC 0x0200 // pseudo MAC prefix (local significant MAC)
+#define PKTIP 0x0800 // IPv4 packet type
+#define PKTIPV6 0x86DD // IPv6 packet type
#define PPPPAP 0xC023
#define PPPCHAP 0xC223
#define PPPLCP 0xC021
#define PPPIPCP 0x8021
+#define PPPIPV6CP 0x8057
#define PPPCCP 0x80FD
#define PPPIP 0x0021
+#define PPPIPV6 0x0057
#define PPPMP 0x003D
#define MIN_IP_SIZE 0x19
-enum
-{
+
+enum {
ConfigReq = 1,
ConfigAck,
ConfigNak,
IdentRequest
};
+enum {
+ AccessRequest = 1,
+ AccessAccept,
+ AccessReject,
+ AccountingRequest,
+ AccountingResponse,
+ AccessChallenge = 11
+};
+
// Types
typedef uint16_t sessionidt;
typedef uint16_t tunnelidt;
#define SF_IPCP_ACKED 1 // Has this session seen an IPCP Ack?
#define SF_LCP_ACKED 2 // LCP negotiated
#define SF_CCP_ACKED 4 // CCP negotiated
+#define SF_IPV6CP_ACKED 8 // IPv6 negotiated
+#define SF_IPV6_NACKED 16 // IPv6 rejected
+
+#define AUTHPAP 1 // allow PAP
+#define AUTHCHAP 2 // allow CHAP
typedef struct
{
+ // byte counters
uint32_t cin;
uint32_t cout;
-} sessioncountt;
+
+ // DoS prevention
+ clockt last_packet_out;
+ uint32_t packets_out;
+ uint32_t packets_dropped;
+} sessionlocalt;
#define SESSIONPFC 1 // PFC negotiated flags
#define SESSIONACFC 2 // ACFC negotiated flags
struct Tstats
{
- time_t start_time;
- time_t last_reset;
-
- unsigned long tun_rx_packets;
- unsigned long tun_tx_packets;
- unsigned long tun_rx_bytes;
- unsigned long tun_tx_bytes;
- unsigned long tun_rx_errors;
- unsigned long tun_tx_errors;
-
- unsigned long tunnel_rx_packets;
- unsigned long tunnel_tx_packets;
- unsigned long tunnel_rx_bytes;
- unsigned long tunnel_tx_bytes;
- unsigned long tunnel_rx_errors;
- unsigned long tunnel_tx_errors;
-
- unsigned long tunnel_retries;
- unsigned long radius_retries;
-
- unsigned long arp_sent;
-
- unsigned long packets_snooped;
-
- unsigned long tunnel_created;
- unsigned long session_created;
- unsigned long tunnel_timeout;
- unsigned long session_timeout;
- unsigned long radius_timeout;
- unsigned long radius_overflow;
- unsigned long tunnel_overflow;
- unsigned long session_overflow;
-
- unsigned long ip_allocated;
- unsigned long ip_freed;
-
- unsigned long c_forwarded;
- unsigned long recv_forward;
+ time_t start_time;
+ time_t last_reset;
+
+ uint32_t tun_rx_packets;
+ uint32_t tun_tx_packets;
+ uint32_t tun_rx_bytes;
+ uint32_t tun_tx_bytes;
+ uint32_t tun_rx_errors;
+ uint32_t tun_tx_errors;
+ uint32_t tun_rx_dropped;
+
+ uint32_t tunnel_rx_packets;
+ uint32_t tunnel_tx_packets;
+ uint32_t tunnel_rx_bytes;
+ uint32_t tunnel_tx_bytes;
+ uint32_t tunnel_rx_errors;
+ uint32_t tunnel_tx_errors;
+
+ uint32_t tunnel_retries;
+ uint32_t radius_retries;
+
+ uint32_t arp_sent;
+
+ uint32_t packets_snooped;
+
+ uint32_t tunnel_created;
+ uint32_t session_created;
+ uint32_t tunnel_timeout;
+ uint32_t session_timeout;
+ uint32_t radius_timeout;
+ uint32_t radius_overflow;
+ uint32_t tunnel_overflow;
+ uint32_t session_overflow;
+
+ uint32_t ip_allocated;
+ uint32_t ip_freed;
+
+ uint32_t c_forwarded;
+ uint32_t recv_forward;
+
+ uint32_t select_called;
+ uint32_t multi_read_used;
+ uint32_t multi_read_exceeded;
+
#ifdef STATISTICS
- unsigned long call_processtun;
- unsigned long call_processipout;
- unsigned long call_processudp;
- unsigned long call_sessionbyip;
- unsigned long call_sessionbyuser;
- unsigned long call_sendarp;
- unsigned long call_sendipcp;
- unsigned long call_tunnelsend;
- unsigned long call_sessionkill;
- unsigned long call_sessionshutdown;
- unsigned long call_tunnelkill;
- unsigned long call_tunnelshutdown;
- unsigned long call_assign_ip_address;
- unsigned long call_free_ip_address;
- unsigned long call_dump_acct_info;
- unsigned long call_sessionsetup;
- unsigned long call_processpap;
- unsigned long call_processchap;
- unsigned long call_processlcp;
- unsigned long call_processipcp;
- unsigned long call_processipin;
- unsigned long call_processccp;
- unsigned long call_sendchap;
- unsigned long call_processrad;
- unsigned long call_radiussend;
- unsigned long call_radiusretry;
+ uint32_t call_processtun;
+ uint32_t call_processipout;
+ uint32_t call_processudp;
+ uint32_t call_sessionbyip;
+ uint32_t call_sessionbyuser;
+ uint32_t call_sendarp;
+ uint32_t call_sendipcp;
+ uint32_t call_tunnelsend;
+ uint32_t call_sessionkill;
+ uint32_t call_sessionshutdown;
+ uint32_t call_tunnelkill;
+ uint32_t call_tunnelshutdown;
+ uint32_t call_assign_ip_address;
+ uint32_t call_free_ip_address;
+ uint32_t call_dump_acct_info;
+ uint32_t call_sessionsetup;
+ uint32_t call_processpap;
+ uint32_t call_processchap;
+ uint32_t call_processlcp;
+ uint32_t call_processipcp;
+ uint32_t call_processipin;
+ uint32_t call_processccp;
+ uint32_t call_sendchap;
+ uint32_t call_processrad;
+ uint32_t call_radiussend;
+ uint32_t call_radiusretry;
+ uint32_t call_random_data;
#endif
};
#ifdef STATISTICS
#ifdef STAT_CALLS
-#define CSTAT(x) STAT(x)
+#define CSTAT(x) STAT(call_ ## x)
#else
#define CSTAT(x)
#endif
char log_filename[128];
char l2tpsecret[64];
+ char random_device[256]; // random device path, defaults to RANDOMDEVICE
+
char radiussecret[64];
int radius_accounting;
in_addr_t radiusserver[MAXRADSERVER]; // radius servers
uint8_t numradiusservers; // radius server count
short num_radfds; // Number of radius filehandles allocated
+ char radius_authtypes_s[32]; // list of valid authentication types (chap, pap) in order of preference
+ int radius_authtypes;
+ int radius_authprefer;
+
in_addr_t default_dns1, default_dns2;
unsigned long rl_rate; // default throttle rate
int next_tbf; // Next HTB id available to use
int scheduler_fifo; // If the system has multiple CPUs, use FIFO scheduling policy for this process.
int lock_pages; // Lock pages into memory.
- int icmp_rate; // Max number of ICMP unreachable per second to send>
+ int icmp_rate; // Max number of ICMP unreachable per second to send
+ int max_packets; // DoS prevention: per session limit of packets/0.1s
in_addr_t cluster_address; // Multicast address of cluster.
// Send to this address to have everyone hear.
#endif
} configt;
-enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP, MAC };
+enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6, MAC };
typedef struct
{
char *key;
clockt backoff(uint8_t try);
sessionidt sessionbyip(in_addr_t ip);
sessionidt sessionbyuser(char *username);
+void random_data(uint8_t *buf, int len);
void sessionshutdown(sessionidt s, char *reason);
void send_garp(in_addr_t ip);
void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t);
extern tunnelt *tunnel;
extern sessiont *session;
-extern sessioncountt *sess_count;
+extern sessionlocalt *sess_local;
extern ippoolt *ip_address_pool;
#define sessionfree (session[0].next)
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