// L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.15 2004/08/02 05:40:21 fred_nerk Exp $
+// $Id: l2tpns.h,v 1.117 2006/06/11 12:46:18 bodea Exp $
#ifndef __L2TPNS_H__
#define __L2TPNS_H__
#include <netinet/in.h>
-#include <execinfo.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/types.h>
#include <libcli.h>
-#define VERSION "2.0.1"
+#define VERSION "2.2.0"
// Limits
#define MAXTUNNEL 500 // could be up to 65535
-#define MAXSESSION 50000 // could be up to 65535
+#define MAXBUNDLE 300 // could be up to 65535
+#define MAXBUNDLESES 10 // Maximum number of member links in bundle
+#define MAXADDRESS 20 // Maximum length for the Endpoint Discrminiator address
+#define MAXFRAGNUM 1500 // Maximum number of Multilink fragment in a bundle
+#define MAXFRAGLEN 1000 // Maximum length for Multilink fragment
+#define MAXSESSION 60000 // could be up to 65535
#define MAXTBFS 6000 // Maximum token bucket filters. Might need up to 2 * session.
-#define RADIUS_SHIFT 5
-#define RADIUS_MASK ((unsigned short)(((unsigned short)~0) >> (16 - RADIUS_SHIFT)))
-#define MAXRADIUS ((2 << (RADIUS_SHIFT - 1)) * 255)
+#define RADIUS_SHIFT 6
+#define RADIUS_FDS (1 << RADIUS_SHIFT)
+#define RADIUS_MASK ((1 << RADIUS_SHIFT) - 1)
+#define MAXRADIUS (1 << (8 + RADIUS_SHIFT))
#define T_UNDEF (0xffff) // A tunnel ID that won't ever be used. Mark session as undefined.
#define T_FREE (0) // A tunnel ID that won't ever be used. Mark session as free.
-#define MAXCONTROL 1000 // max length control message we ever send...
-#define MAXETHER (1500+18) // max packet we try sending to tun
-#define MAXTEL 96 // telephone number
+#define MAXCONTROL 1000 // max length control message we ever send...
+#define MINMTU 576 // minimum recommended MTU (rfc1063)
+#define MAXMTU 2600 // arbitrary maximum MTU
+#define PPPoE_MRU 1492 // maximum PPPoE MRU (rfc2516: 1500 less PPPoE header (6) and PPP protocol ID (2))
+#define MAXETHER (MAXMTU+18) // max packet we try sending to tun
+#define MAXTEL 96 // telephone number
+#define MAXUSER 128 // username
+#define MAXPASS 128 // password
#define MAXPLUGINS 20 // maximum number of plugins to load
#define MAXRADSERVER 10 // max radius servers
-#define MAXROUTE 10 // max static routes per session
+#define MAXROUTE 10 // max static routes per session
#define MAXIPPOOL 131072 // max number of ip addresses in pool
#define RINGBUFFER_SIZE 10000 // Number of ringbuffer entries to allocate
#define MAX_LOG_LENGTH 512 // Maximum size of log message
-#define ECHO_TIMEOUT 60 // Time between last packet sent and LCP ECHO generation
+#define ECHO_TIMEOUT 10 // Time between last packet sent and LCP ECHO generation
#define IDLE_TIMEOUT 240 // Time between last packet sent and LCP ECHO generation
+#define BUSY_WAIT_TIME 3000 // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown
+
+#define MP_BEGIN 0x80 // This value is used when (b)egin bit is set in MP header
+#define MP_END 0x40 // This value is used when (e)nd bit is set in MP header
+#define MP_BOTH_BITS 0xC0 // This value is used when both bits (begin and end) are set in MP header
+
+#define DEFAULT_EPDIS_ADDRESS "L2TPNetServer" // Company name may goes here!
// Constants
-#include "config.h"
-#ifndef PLUGINDIR
-#define PLUGINDIR LIBDIR // Plugins
+#ifndef ETCDIR
+#define ETCDIR "/etc/l2tpns"
#endif
-#ifndef PLUGINCONF
-#define PLUGINCONF ETCDIR // Plugin config dir
+#ifndef LIBDIR
+#define LIBDIR "/usr/lib/l2tpns"
+#endif
+
+#ifndef PLUGINDIR
+#define PLUGINDIR LIBDIR // Plugins
#endif
-#ifndef DATADIR
-#define DATADIR "/tmp"
+#ifndef PLUGINCONF
+#define PLUGINCONF ETCDIR // Plugin config dir
#endif
#ifndef FLASHDIR
#endif
#define TUNDEVICE "/dev/net/tun"
-#define STATEFILE DATADIR "/state.dump" // State dump file
+#define RANDOMDEVICE "/dev/urandom" // default, not as secure as /dev/random but non-blocking
#define CONFIGFILE FLASHDIR "/startup-config" // Configuration file
#define CLIUSERS FLASHDIR "/users" // CLI Users file
#define IPPOOLFILE FLASHDIR "/ip_pool" // Address pool configuration
-#define ACCT_TIME 3000 // 5 minute accounting interval
-#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 PPPPAP 0xC023
-#define PPPCHAP 0xC223
-#define PPPLCP 0xC021
-#define PPPIPCP 0x8021
-#define PPPCCP 0x80FD
+#define ACCT_TIME 3000 // 5 minute accounting interval
+#define ACCT_SHUT_TIME 600 // 1 minute for counters of shutdown sessions
+#define L2TPPORT 1701 // L2TP port
+#define RADPORT 1645 // old radius port...
+#define DAEPORT 3799 // DAE port
+#define PKTARP 0x0806 // ARP packet type
+#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,
+ DisconnectRequest = 40,
+ DisconnectACK,
+ DisconnectNAK,
+ CoARequest,
+ CoAACK,
+ CoANAK
+};
+
+// PPP phases
+enum {
+ Dead,
+ Establish,
+ Authenticate,
+ Network,
+ Terminate
+};
+
+// PPP states
+enum {
+ Initial,
+ Starting,
+ Closed,
+ Stopped,
+ Closing,
+ Stopping,
+ RequestSent,
+ AckReceived,
+ AckSent,
+ Opened
+};
+
+// reset state machine counters
+#define initialise_restart_count(_s, _fsm) \
+ sess_local[_s]._fsm.conf_sent = \
+ sess_local[_s]._fsm.nak_sent = 0
+
+// no more attempts
+#define zero_restart_count(_s, _fsm) ({ \
+ sess_local[_s]._fsm.conf_sent = \
+ config->ppp_max_configure; \
+ sess_local[_s]._fsm.restart = \
+ time_now + config->ppp_restart_time; \
+})
+
+// increment ConfReq counter and reset timer
+#define restart_timer(_s, _fsm) ({ \
+ sess_local[_s]._fsm.conf_sent++; \
+ sess_local[_s]._fsm.restart = \
+ time_now + config->ppp_restart_time; \
+})
+
+// stop timer on change to state where timer does not run
+#define change_state(_s, _fsm, _new) ({ \
+ if (_new != session[_s].ppp._fsm) \
+ { \
+ switch (_new) \
+ { \
+ case Initial: \
+ case Starting: \
+ case Closed: \
+ case Stopped: \
+ case Opened: \
+ sess_local[_s]._fsm.restart = 0; \
+ initialise_restart_count(_s, _fsm); \
+ } \
+ session[_s].ppp._fsm = _new; \
+ cluster_send_session(_s); \
+ } \
+})
+
// Types
-typedef unsigned short u16;
-typedef unsigned int u32;
-typedef unsigned char u8;
-typedef u32 ipt;
-typedef u16 portt;
-typedef u16 sessionidt;
-typedef u16 tunnelidt;
-typedef u32 clockt;
-typedef u8 hasht[16];
+typedef uint16_t sessionidt;
+typedef uint16_t bundleidt;
+typedef uint16_t tunnelidt;
+typedef uint32_t clockt;
+typedef uint8_t hasht[16];
// CLI actions
struct cli_session_actions {
char action;
- ipt snoop_ip;
- u16 snoop_port;
- int throttle;
+ in_addr_t snoop_ip;
+ uint16_t snoop_port;
+ int throttle_in;
+ int throttle_out;
+ int filter_in;
+ int filter_out;
};
#define CLI_SESS_KILL 0x01
#define CLI_SESS_NOSNOOP 0x04
#define CLI_SESS_THROTTLE 0x08
#define CLI_SESS_NOTHROTTLE 0x10
+#define CLI_SESS_FILTER 0x20
+#define CLI_SESS_NOFILTER 0x40
struct cli_tunnel_actions {
char action;
#define CLI_TUN_KILL 0x01
-// dump header: update number if internal format changes
-#define DUMP_MAGIC "L2TPNS#" VERSION "#"
-
// structures
-typedef struct routes // route
+typedef struct // route
{
- ipt ip;
- ipt mask;
+ in_addr_t ip;
+ in_addr_t mask;
}
routet;
-typedef struct controls // control message
+typedef struct controls // control message
{
- struct controls *next; // next in queue
- u16 length; // length
- u8 buf[MAXCONTROL];
+ struct controls *next; // next in queue
+ uint16_t length; // length
+ uint8_t buf[MAXCONTROL];
}
controlt;
-typedef struct sessions
+typedef struct {
+ uint8_t length; // Endpoint Discriminator length
+ uint8_t addr_class; // Endpoint Discriminator class
+ uint8_t address[MAXADDRESS]; // Endpoint Discriminator address
+} epdist;
+
+typedef struct {
+ uint16_t length; // Fragment length
+ uint8_t data[MAXFRAGLEN]; // Fragment data
+} fragmentt;
+
+typedef struct
{
sessionidt next; // next session in linked list
sessionidt far; // far end session ID
- tunnelidt tunnel; // tunnel ID
- ipt ip; // IP of session set by RADIUS response (host byte order).
+ tunnelidt tunnel; // near end tunnel ID
+ uint8_t flags; // session flags: see SESSION_*
+ struct {
+ uint8_t phase; // PPP phase
+ uint8_t lcp:4; // LCP state
+ uint8_t ipcp:4; // IPCP state
+ uint8_t ipv6cp:4; // IPV6CP state
+ uint8_t ccp:4; // CCP state
+ } ppp;
+ char reserved_1[2]; // unused: padding
+ in_addr_t ip; // IP of session set by RADIUS response (host byte order).
int ip_pool_index; // index to IP pool
- unsigned long sid; // session id for hsddb
- u16 nr; // next receive
- u16 ns; // next send
- u32 magic; // ppp magic number
- u32 cin, cout; // byte counts
- u32 pin, pout; // packet counts
- u32 total_cin; // This counter is never reset while a session is open
- u32 total_cout; // This counter is never reset while a session is open
- u32 id; // session id
- u32 throttle; // non-zero if this session is throttled.
+ uint32_t unique_id; // unique session id
+ char reserved_2[4]; // unused: was ns/nr
+ uint32_t magic; // ppp magic number
+ uint32_t pin, pout; // packet counts
+ uint32_t cin, cout; // byte counts
+ uint32_t cin_wrap, cout_wrap; // byte counter wrap count (RADIUS accounting giagawords)
+ uint32_t cin_delta, cout_delta; // byte count changes (for dump_session())
+ uint16_t throttle_in; // upstream throttle rate (kbps)
+ uint16_t throttle_out; // downstream throttle rate
+ uint8_t filter_in; // input filter index (to ip_filters[N-1]; 0 if none)
+ uint8_t filter_out; // output filter index
+ uint16_t mru; // maximum receive unit
clockt opened; // when started
clockt die; // being closed, when to finally free
+ uint32_t session_timeout; // Maximum session time in seconds
+ uint32_t idle_timeout; // Maximum idle time in seconds
time_t last_packet; // Last packet from the user (used for idle timeouts)
- ipt dns1, dns2; // DNS servers
+ time_t last_data; // Last data packet to/from the user (used for idle timeouts)
+ in_addr_t dns1, dns2; // DNS servers
routet route[MAXROUTE]; // static routes
- u16 radius; // which radius session is being used (0 for not waiting on authentication)
- u16 mru; // maximum receive unit
- u16 tbf_in; // filter bucket for throttling in from the user.
- u16 tbf_out; // filter bucket for throttling out to the user.
- u8 l2tp_flags; // various bit flags from the ICCN on the l2tp tunnel.
- u8 walled_garden; // is this session gardened?
- u8 flags1; // additional flags (currently unused);
- char random_vector[MAXTEL];
+ uint16_t tbf_in; // filter bucket for throttling in from the user.
+ uint16_t tbf_out; // filter bucket for throttling out to the user.
int random_vector_length;
- char user[129]; // user (needed in seesion for radius stop messages) (can we reduce this? --mo)
+ uint8_t random_vector[MAXTEL];
+ char user[MAXUSER]; // user (needed in seesion for radius stop messages)
char called[MAXTEL]; // called number
char calling[MAXTEL]; // calling number
- u32 tx_connect_speed;
- u32 rx_connect_speed;
- u32 flags; // Various session flags.
- ipt snoop_ip; // Interception destination IP
- u16 snoop_port; // Interception destination port
- char reserved[28]; // Space to expand structure without changing HB_VERSION
+ uint32_t tx_connect_speed;
+ uint32_t rx_connect_speed;
+ clockt timeout; // Session timeout
+ uint32_t mrru; // Multilink Max-Receive-Reconstructed-Unit
+ uint8_t mssf; // Multilink Short Sequence Number Header Format
+ epdist epdis; // Multilink Endpoint Discriminator
+ bundleidt bundle; // Multilink Bundle Identifier
+ in_addr_t snoop_ip; // Interception destination IP
+ uint16_t snoop_port; // Interception destination port
+ uint8_t walled_garden; // is this session gardened?
+ uint8_t ipv6prefixlen; // IPv6 route prefix length
+ struct in6_addr ipv6route; // Static IPv6 route
+ char reserved_3[11]; // Space to expand structure without changing HB_VERSION
}
sessiont;
-#define SF_IPCP_ACKED (1<<0) // Has this session seen an IPCP Ack?
+typedef struct
+{
+ int state; // current state (bundlestate enum)
+ uint32_t seq_num_t; // Sequence Number (transmission)
+ uint32_t seq_num_m; // Last received frame sequence number (bearing B bit)
+ uint32_t offset; // Offset between sequence number and array index
+ uint8_t pending_frag; // Indicate that there is pending fragments to reassemble
+ uint8_t num_of_links; // Number of links joint to this bundle
+ uint32_t online_time; // The time this bundle is online
+ clockt last_check; // Last time the timeout is checked
+ uint32_t mrru; // Multilink Max-Receive-Reconstructed-Unit
+ uint8_t mssf; // Multilink Short Sequence Number Header Format
+ epdist epdis; // Multilink Endpoint Discriminator
+ char user[MAXUSER]; // Needed for matching member links
+ sessionidt current_ses; // Current session to use for sending (used in RR load-balancing)
+ sessionidt members[MAXBUNDLESES]; // Array for member links sessions
+}
+bundlet;
+
+typedef struct
+{
+ fragmentt fragment[MAXFRAGNUM];
+ uint8_t reassembled_frame[MAXETHER]; // The reassembled frame
+ uint16_t re_frame_len; // The reassembled frame length
+}
+fragmentationt;
-typedef struct {
- u32 cin;
- u32 cout;
-} sessioncountt;
+#define AUTHPAP 1 // allow PAP
+#define AUTHCHAP 2 // allow CHAP
+
+typedef struct
+{
+ // packet counters
+ uint32_t pin;
+ uint32_t pout;
+
+ // byte counters
+ uint32_t cin;
+ uint32_t cout;
+
+ // PPP restart timer/counters
+ struct {
+ time_t restart;
+ int conf_sent;
+ int nak_sent;
+ } lcp, ipcp, ipv6cp, ccp;
+
+ // identifier for Protocol-Reject, Code-Reject
+ uint8_t lcp_ident;
+
+ // authentication to use
+ int lcp_authtype;
-#define SESSIONPFC 1 // PFC negotiated flags
-#define SESSIONACFC 2 // ACFC negotiated flags
-#define SESSIONLCPACK 4 // LCP negotiated
+ // our MRU
+ uint16_t ppp_mru;
+
+ // our MRRU
+ uint16_t mp_mrru;
+
+ // our mssf
+ uint16_t mp_mssf;
+
+ // our Endpoint Discriminator
+ in_addr_t mp_epdis;
+
+ // DoS prevention
+ clockt last_packet_out;
+ uint32_t packets_out;
+ uint32_t packets_dropped;
+
+ // RADIUS session in use
+ uint16_t radius;
+
+ // interim RADIUS
+ time_t last_interim;
+
+ // last LCP Echo
+ time_t last_echo;
+} sessionlocalt;
+
+// session flags
+#define SESSION_PFC (1 << 0) // use Protocol-Field-Compression
+#define SESSION_ACFC (1 << 1) // use Address-and-Control-Field-Compression
+#define SESSION_STARTED (1 << 2) // RADIUS Start record sent
// 168 bytes per tunnel
-typedef struct tunnels
+typedef struct
{
tunnelidt far; // far end tunnel ID
- ipt ip; // Ip for far end
- portt port; // port for far end
- u16 window; // Rx window
- u16 nr; // next receive
- u16 ns; // next send
+ in_addr_t ip; // Ip for far end
+ uint16_t port; // port for far end
+ uint16_t window; // Rx window
+ uint16_t nr; // next receive
+ uint16_t ns; // next send
int state; // current state (tunnelstate enum)
clockt last; // when last control message sent (used for resend timeout)
- clockt retry; // when to try resenting pending control
+ clockt retry; // when to try resending pending control
clockt die; // being closed, when to finally free
clockt lastrec; // when the last control message was received
char hostname[128]; // tunnel hostname
char vendor[128]; // LAC vendor
- u8 try; // number of retrys on a control message
- u16 controlc; // outstaind messages in queue
+ uint8_t try; // number of retrys on a control message
+ uint16_t controlc; // outstaind messages in queue
controlt *controls; // oldest message
controlt *controle; // newest message
}
tunnelt;
-// 180 bytes per radius session
-typedef struct radiuss // outstanding RADIUS requests
+// 164 bytes per radius session
+typedef struct // outstanding RADIUS requests
{
sessionidt session; // which session this applies to
hasht auth; // request authenticator
clockt retry; // when to try next
- char calling[MAXTEL]; // calling number
char pass[129]; // password
- u8 id; // ID for PPP response
- u8 try; // which try we are on
- u8 state; // state of radius requests
- u8 chap; // set if CHAP used (is CHAP identifier)
+ uint8_t id; // ID for PPP response
+ uint8_t try; // which try we are on
+ uint8_t state; // state of radius requests
+ uint8_t chap; // set if CHAP used (is CHAP identifier)
+ uint8_t term_cause; // Stop record: Acct-Terminate-Cause
+ char const *term_msg; // terminate reason
}
radiust;
typedef struct
{
- ipt address; // Host byte order..
+ in_addr_t address; // Host byte order..
char assigned; // 1 if assigned, 0 if free
sessionidt session;
clockt last; // last used
char level;
sessionidt session;
tunnelidt tunnel;
- ipt address;
char message[MAX_LOG_LENGTH];
} buffer[RINGBUFFER_SIZE];
int head;
TUNNELUNDEF, // Undefined
};
+enum
+{
+ BUNDLEFREE, // Not in use
+ BUNDLEOPEN, // Active bundle
+ BUNDLEUNDEF, // Undefined
+};
+
+enum
+{
+ NULLCLASS = 0, //End Point Discriminator classes
+ LOCALADDR,
+ IPADDR,
+ IEEEMACADDR,
+ PPPMAGIC,
+ PSNDN,
+};
+
enum
{
RADIUSNULL, // Not in use
RADIUSCHAP, // sending CHAP down PPP
RADIUSAUTH, // sending auth to RADIUS server
- RADIUSIPCP, // sending IPCP to end user
RADIUSSTART, // sending start accounting to RADIUS server
RADIUSSTOP, // sending stop accounting to RADIUS server
+ RADIUSINTERIM, // sending interim accounting to RADIUS server
RADIUSWAIT, // waiting timeout before available, in case delayed replies
- RADIUSDEAD, // errored while talking to radius server.
};
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_processipv6out;
+ uint32_t call_processudp;
+ uint32_t call_sessionbyip;
+ uint32_t call_sessionbyipv6;
+ uint32_t call_sessionbyuser;
+ uint32_t call_sendarp;
+ uint32_t call_sendipcp;
+ uint32_t call_sendipv6cp;
+ uint32_t call_processipv6cp;
+ 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_processipv6in;
+ 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
#define SET_STAT(x, y)
#endif
-struct configt
+typedef struct
{
int debug; // debugging level
time_t start_time; // time when l2tpns was started
char config_file[128];
int reload_config; // flag to re-read config (set by cli)
- int cleanup_interval; // interval between regular cleanups (in seconds)
int multi_read_count; // amount of packets to read per fd in processing loop
char tundevice[10]; // tun device name
char log_filename[128];
- char l2tpsecret[64];
+
+ char l2tp_secret[64]; // L2TP shared secret
+ int l2tp_mtu; // MTU of interface used for L2TP
+
+ char random_device[256]; // random device path, defaults to RANDOMDEVICE
+
+ int ppp_restart_time; // timeout for PPP restart
+ int ppp_max_configure; // max lcp configure requests to send
+ int ppp_max_failure; // max lcp configure naks to send
char radiussecret[64];
int radius_accounting;
- ipt radiusserver[MAXRADSERVER]; // radius servers
- u16 radiusport[MAXRADSERVER]; // radius base ports
- u8 numradiusservers; // radius server count
- short num_radfds; // Number of radius filehandles allocated
+ int radius_interim;
+ in_addr_t radiusserver[MAXRADSERVER]; // radius servers
+ uint16_t radiusport[MAXRADSERVER]; // radius base ports
+ uint8_t numradiusservers; // radius server count
+
+ uint16_t radius_dae_port; // local port for radius dae
+
+ char radius_authtypes_s[32]; // list of valid authentication types (chap, pap) in order of preference
+ int radius_authtypes;
+ int radius_authprefer;
- ipt default_dns1, default_dns2;
+ int allow_duplicate_users; // allow multiple logins with the same username
+ char guest_user[MAXUSER]; // allow multiple logins to guest account username
+
+ in_addr_t default_dns1, default_dns2;
+
+ unsigned long rl_rate; // default throttle rate
+ int num_tbfs; // number of throttle buckets
- unsigned long rl_rate;
- int save_state;
char accounting_dir[128];
- ipt bind_address;
+ in_addr_t bind_address;
+ in_addr_t peer_address;
int send_garp; // Set to true to garp for vip address on startup
- int target_uid;
int dump_speed;
char plugins[64][MAXPLUGINS];
char old_plugins[64][MAXPLUGINS];
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 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
+ char epdis_addr[20]; // MP Endpoint Discriminator address
- u32 cluster_address; // Multicast address of cluster.
+ in_addr_t cluster_address; // Multicast address of cluster.
// Send to this address to have everyone hear.
char cluster_interface[64]; // Which interface to listen for multicast on.
int cluster_iam_master; // Are we the cluster master???
int cluster_iam_uptodate; // Set if we've got a full set of state from the master.
- u32 cluster_master_address; // The network address of the cluster master.
+ in_addr_t cluster_master_address; // The network address of the cluster master.
// Zero if i am the cluster master.
int cluster_seq_number; // Sequence number of the next heartbeat we'll send out
// (or the seq number we're next expecting if we're a slave).
int cluster_undefined_sessions; // How many sessions we're yet to receive from the master.
+ int cluster_undefined_bundles; // How many bundles we're yet to receive from the master.
int cluster_undefined_tunnels; // How many tunnels we're yet to receive from the master.
int cluster_highest_sessionid;
+ int cluster_highest_bundleid;
int cluster_highest_tunnelid;
clockt cluster_last_hb; // Last time we saw a heartbeat from the master.
+ int cluster_last_hb_ver; // Heartbeat version last seen from master
int cluster_num_changes; // Number of changes queued.
+ int cluster_mcast_ttl; // TTL for multicast packets
int cluster_hb_interval; // How often to send a heartbeat.
int cluster_hb_timeout; // How many missed heartbeats trigger an election.
+ uint64_t cluster_table_version; // # state changes processed by cluster
+ int cluster_master_min_adv; // Master advertises routes while the number of up to date
+ // slaves is less than this value.
+
+ struct in6_addr ipv6_prefix; // Our IPv6 network pool.
#ifdef BGP
- u16 as_number;
- char bgp_peer[2][64];
- u16 bgp_peer_as[2];
+#define BGP_NUM_PEERS 2
+ uint16_t as_number;
+ struct {
+ char name[64];
+ uint16_t as;
+ int keepalive;
+ int hold;
+ } neighbour[BGP_NUM_PEERS];
#endif
-};
+} configt;
-struct config_descriptt
+enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6 };
+typedef struct
{
char *key;
int offset;
int size;
- enum { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP } type;
-};
+ enum config_typet type;
+} config_descriptt;
+
+typedef struct
+{
+ uint8_t op; // operation
+#define FILTER_PORT_OP_NONE 0 // all ports match
+#define FILTER_PORT_OP_EQ 1
+#define FILTER_PORT_OP_NEQ 2
+#define FILTER_PORT_OP_GT 3
+#define FILTER_PORT_OP_LT 4
+#define FILTER_PORT_OP_RANGE 5
+ uint16_t port; // port (host byte order)
+ uint16_t port2; // range
+} ip_filter_portt;
+
+typedef struct
+{
+ int action; // permit/deny
+#define FILTER_ACTION_DENY 1
+#define FILTER_ACTION_PERMIT 2
+ uint8_t proto; // protocol: IPPROTO_* (netinet/in.h)
+ in_addr_t src_ip; // source ip (network byte order)
+ in_addr_t src_wild;
+ ip_filter_portt src_ports;
+ in_addr_t dst_ip; // dest ip
+ in_addr_t dst_wild;
+ ip_filter_portt dst_ports;
+ uint8_t frag; // apply to non-initial fragments
+ uint8_t tcp_flag_op; // match type: any, all, established
+#define FILTER_FLAG_OP_ANY 1
+#define FILTER_FLAG_OP_ALL 2
+#define FILTER_FLAG_OP_EST 3
+ uint8_t tcp_sflags; // flags set
+ uint8_t tcp_cflags; // flags clear
+ uint32_t counter; // match count
+} ip_filter_rulet;
+
+#define TCP_FLAG_FIN 0x01
+#define TCP_FLAG_SYN 0x02
+#define TCP_FLAG_RST 0x04
+#define TCP_FLAG_PSH 0x08
+#define TCP_FLAG_ACK 0x10
+#define TCP_FLAG_URG 0x20
+
+#define MAXFILTER 32
+#define MAXFILTER_RULES 32
+typedef struct
+{
+ char name[32]; // ACL name
+ int extended; // type: 0 = standard, 1 = extended
+ ip_filter_rulet rules[MAXFILTER_RULES];
+ int used; // session ref count
+} ip_filtert;
+
+// CDN result/error codes
+#define CDN_NONE 0, 0
+#define CDN_TRY_ANOTHER 2, 7
+#define CDN_ADMIN_DISC 3, 0
+#define CDN_UNAVAILABLE 4, 0
+
+// RADIUS Acct-Terminate-Cause values
+#define TERM_USER_REQUEST 1
+#define TERM_LOST_CARRIER 2
+#define TERM_LOST_SERVICE 3
+#define TERM_IDLE_TIMEOUT 4
+#define TERM_SESSION_TIMEOUT 5
+#define TERM_ADMIN_RESET 6
+#define TERM_ADMIN_REBOOT 7
+#define TERM_PORT_ERROR 8
+#define TERM_NAS_ERROR 9
+#define TERM_NAS_REQUEST 10
+#define TERM_NAS_REBOOT 11
+#define TERM_PORT_UNNEEDED 12
+#define TERM_PORT_PREEMPTED 13
+#define TERM_PORT_SUSPENDED 14
+#define TERM_SERVICE_UNAVAILABLE 15
+#define TERM_CALLBACK 16
+#define TERM_USER_ERROR 17
+#define TERM_HOST_REQUEST 18
+#define TERM_SUPPLICANT_RESTART 19
+#define TERM_REAUTHENTICATION_FAILURE 20
+#define TERM_PORT_REINIT 21
+#define TERM_PORT_DISABLED 22
// arp.c
-void sendarp(int ifr_idx, const unsigned char* mac, ipt ip);
+void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip);
// ppp.c
-void processpap(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void processchap(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void processlcp(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void processipcp(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void processipin(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void processccp(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void sendchap(tunnelidt t, sessionidt s);
-u8 *makeppp(u8 * b, int size, u8 * p, int l, tunnelidt t, sessionidt s, u16 mtype);
-u8 *findppp(u8 * b, u8 mtype);
-void initlcp(tunnelidt t, sessionidt s);
-void dumplcp(u8 *p, int l);
+void processpap(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processchap(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void lcp_open(sessionidt s, tunnelidt t);
+void processlcp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processipcp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processipv6cp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processipin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processmpframe(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l, uint8_t extra);
+void processipv6in(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processccp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void sendchap(sessionidt s, tunnelidt t);
+uint8_t *makeppp(uint8_t *b, int size, uint8_t *p, int l, sessionidt s, tunnelidt t, uint16_t mtype, uint8_t prio, bundleidt bid, uint8_t mp_bits);
+void sendlcp(sessionidt s, tunnelidt t);
+void send_ipin(sessionidt s, uint8_t *buf, int len);
+void sendccp(sessionidt s, tunnelidt t);
+void protoreject(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l, uint16_t proto);
+int join_bundle(sessionidt s);
// radius.c
void initrad(void);
-void radiussend(u16 r, u8 state);
-void processrad(u8 *buf, int len, char socket_index);
-void radiusretry(u16 r);
-u16 radiusnew(sessionidt s);
-void radiusclear(u16 r, sessionidt s);
-
-// throttle.c
-int throttle_session(sessionidt s, int throttle);
-
-
-// rl.c
-void init_rl();
-u16 rl_create_tbf();
-u16 rl_get_tbf();
-void rl_done_tbf(u16 t);
-void rl_destroy_tbf(u16 t);
+void radiussend(uint16_t r, uint8_t state);
+void processrad(uint8_t *buf, int len, char socket_index);
+void radiusretry(uint16_t r);
+uint16_t radiusnew(sessionidt s);
+void radiusclear(uint16_t r, sessionidt s);
+void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local);
// l2tpns.c
-clockt now(void);
-clockt backoff(u8 try);
-void routeset(sessionidt, ipt ip, ipt mask, ipt gw, u8 add);
-void inittun(void);
-void initudp(void);
-void initdata(void);
-void initippool();
-sessionidt sessionbyip(ipt ip);
+clockt backoff(uint8_t try);
+void send_ipv6_ra(sessionidt s, tunnelidt t, struct in6_addr *ip);
+void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add);
+sessionidt sessionbyip(in_addr_t ip);
+sessionidt sessionbyipv6(struct in6_addr ip);
sessionidt sessionbyuser(char *username);
-void sessionshutdown(sessionidt s, char *reason);
-void sessionsendarp(sessionidt s);
-void send_garp(ipt ip);
+void increment_counter(uint32_t *counter, uint32_t *wrap, uint32_t delta);
+void random_data(uint8_t *buf, int len);
void sessionkill(sessionidt s, char *reason);
-void control16(controlt * c, u16 avp, u16 val, u8 m);
-void control32(controlt * c, u16 avp, u32 val, u8 m);
-void controls(controlt * c, u16 avp, char *val, u8 m);
-void controlb(controlt * c, u16 avp, char *val, unsigned int len, u8 m);
-controlt *controlnew(u16 mtype);
-void controlnull(tunnelidt t);
-void controladd(controlt * c, tunnelidt t, sessionidt s);
-void tunnelsend(u8 * buf, u16 l, tunnelidt t);
-void tunnelkill(tunnelidt t, char *reason);
-void tunnelshutdown(tunnelidt t, char *reason);
-void sendipcp(tunnelidt t, sessionidt s);
-void processipout(u8 * buf, int len);
-void processarp(u8 * buf, int len);
-void processudp(u8 * buf, int len, struct sockaddr_in *addr);
-void processtun(u8 * buf, int len);
-void processcontrol(u8 * buf, int len, struct sockaddr_in *addr);
-int assign_ip_address(sessionidt s);
-void free_ip_address(sessionidt s);
-void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port);
-void dump_acct_info();
-void mainloop(void);
+void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_error, int term_cause);
+void filter_session(sessionidt s, int filter_in, int filter_out);
+void send_garp(in_addr_t ip);
+void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t);
+int tun_write(uint8_t *data, int size);
+void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *tcp);
+void sendipcp(sessionidt s, tunnelidt t);
+void sendipv6cp(sessionidt s, tunnelidt t);
+void processudp(uint8_t *buf, int len, struct sockaddr_in *addr);
+void snoop_send_packet(uint8_t *packet, uint16_t size, in_addr_t destination, uint16_t port);
+int find_filter(char const *name, size_t len);
+int ip_filter(uint8_t *buf, int len, uint8_t filter);
int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc);
int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc);
int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc);
-#define log _log
-#ifndef log_hex
-#define log_hex(a,b,c,d) do{if (a <= config->debug) _log_hex(a,0,0,0,b,c,d);}while (0)
-#endif
-void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 5, 6)));
-void _log_hex(int level, ipt address, sessionidt s, tunnelidt t, const char *title, const char *data, int maxsize);
-void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response);
-int sessionsetup(tunnelidt t, sessionidt s);
-int cluster_send_session(int s);
-int cluster_send_tunnel(int t);
-int cluster_send_goodbye();
-void init_cli(char *hostname);
-void cli_do_file(FILE *fh);
-void cli_do(int sockfd);
-int cli_arg_help(struct cli_def *cli, int cr_ok, char *entry, ...);
-#ifdef RINGBUFFER
-void ringbuffer_dump(FILE *stream);
-#endif
-void initplugins(void);
+#undef LOG
+#undef LOG_HEX
+#define LOG(D, s, t, f, ...) ({ if (D <= config->debug) _log(D, s, t, f, ## __VA_ARGS__); })
+#define LOG_HEX(D, t, d, s) ({ if (D <= config->debug) _log_hex(D, t, d, s); })
+
+void _log(int level, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 4, 5)));
+void _log_hex(int level, const char *title, const uint8_t *data, int maxsize);
+
+
+int sessionsetup(sessionidt s, tunnelidt t);
int run_plugins(int plugin_type, void *data);
-void add_plugin(char *plugin_name);
-void remove_plugin(char *plugin_name);
-void plugins_done(void);
-void tunnelclear(tunnelidt t);
-void host_unreachable(ipt destination, u16 id, ipt source, char *packet, int packet_len);
-void fix_address_pool(int sid);
void rebuild_address_pool(void);
-void send_ipin(sessionidt s, u8 * buf, int len);
-int throttle_session(sessionidt s, int throttle);
+void throttle_session(sessionidt s, int rate_in, int rate_out);
int load_session(sessionidt, sessiont *);
void become_master(void); // We're the master; kick off any required master initializations.
+
+
+// cli.c
+void init_cli(char *hostname);
+void cli_do_file(FILE *fh);
+void cli_do(int sockfd);
+int cli_arg_help(struct cli_def *cli, int cr_ok, char *entry, ...);
+
+
+// icmp.c
+void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, uint8_t *packet, int packet_len);
+
+
extern tunnelt *tunnel;
+extern bundlet *bundle;
extern sessiont *session;
-extern sessioncountt *sess_count;
+extern sessionlocalt *sess_local;
extern ippoolt *ip_address_pool;
#define sessionfree (session[0].next)
-#define log_backtrace(count, max) \
-if (count++ < max) { \
- void *array[20]; \
- char **strings; \
- int size, i; \
- log(0, 0, 0, t, "Backtrace follows"); \
- size = backtrace(array, 10); \
- strings = backtrace_symbols(array, size); \
- if (strings) for (i = 0; i < size; i++) \
- { \
- log(0, 0, 0, t, "%s\n", strings[i]); \
- } \
- free(strings); \
-}
-
-extern struct configt *config;
+extern configt *config;
extern time_t basetime; // Time when this process started.
extern time_t time_now; // Seconds since EPOCH.
-extern u32 last_sid;
+extern char main_quit;
+extern uint32_t last_id;
extern struct Tstats *_statistics;
-extern ipt my_address;
-extern int tun_write(u8 *data, int size);
-
+extern in_addr_t my_address;
+extern int clifd;
+extern int epollfd;
+
+struct event_data {
+ enum {
+ FD_TYPE_CLI,
+ FD_TYPE_CLUSTER,
+ FD_TYPE_TUN,
+ FD_TYPE_UDP,
+ FD_TYPE_CONTROL,
+ FD_TYPE_DAE,
+ FD_TYPE_RADIUS,
+ FD_TYPE_BGP,
+ } type;
+ int index; // for RADIUS, BGP
+};
#define TIME (config->current_time)
+extern uint16_t MRU;
+extern uint16_t MSS;
+
// macros for handling help in cli commands
#define CLI_HELP_REQUESTED (argc > 0 && argv[argc-1][strlen(argv[argc-1])-1] == '?')
#define CLI_HELP_NO_ARGS (argc > 1 || argv[0][1]) ? CLI_OK : cli_arg_help(cli, 1, NULL)
projects / l2tpns.git / blobdiff