// L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.104 2005/12/06 23:53:14 bodea Exp $
+// $Id: l2tpns.h,v 1.121 2009/12/08 14:49:28 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 "2.1.13"
+#define VERSION "2.2.0"
// Limits
#define MAXTUNNEL 500 // could be up to 65535
+#define MAXBUNDLE 300 // could be up to 65535
+#define MAXBUNDLESES 12 // Maximum number of member links in bundle
+#define MAXADDRESS 20 // Maximum length for the Endpoint Discrminiator address
#define MAXSESSION 60000 // could be up to 65535
#define MAXTBFS 6000 // Maximum token bucket filters. Might need up to 2 * session.
#define MAXCONTROL 1000 // max length control message we ever send...
#define MINMTU 576 // minimum recommended MTU (rfc1063)
-#define PPPMTU 1500 // default PPP MTU
#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 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 IDLE_TIMEOUT 240 // 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 seen and session shutdown
#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 MINFRAGLEN 64 // Minumum fragment length
+#define MAXFRAGLEN 750 // Maximum length for Multilink fragment (MTU / 2 sessions)
+#define MAXFRAGNUM 128 // Maximum number of Multilink fragment in a bundle (must be in the form of 2^X)
+ // it's not expected to have a space for more than 10 unassembled packets = 10 * MAXBUNDLESES
+#define MAXFRAGNUM_MASK 127 // Must be equal to MAXFRAGNUM-1
+
// Constants
#ifndef ETCDIR
#define ETCDIR "/etc/l2tpns"
// reset state machine counters
#define initialise_restart_count(_s, _fsm) \
- sess_local[_s]._fsm.conf_sent = sess_local[_s]._fsm.nak_sent = 0
+ 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) ({ \
// Types
typedef uint16_t sessionidt;
+typedef uint16_t bundleidt;
typedef uint16_t tunnelidt;
typedef uint32_t clockt;
typedef uint8_t hasht[16];
}
controlt;
+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 {
+ sessionidt sid; // Fragment originating session
+ uint8_t flags; // MP frame flags
+ uint32_t seq; // fragment seq num
+ uint16_t length; // Fragment length
+ uint8_t data[MAXFRAGLEN]; // Fragment data
+} fragmentt;
+
typedef struct
{
sessionidt next; // next session in linked list
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)
+ 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
uint16_t tbf_in; // filter bucket for throttling in from the user.
char calling[MAXTEL]; // calling number
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?
}
sessiont;
+typedef struct
+{
+ int state; // current state (bundlestate enum)
+ uint32_t seq_num_t; // Sequence Number (transmission)
+ uint32_t timeout; // Session-Timeout for bundle
+ uint32_t max_seq; // Max value of sequence number field
+ 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
+ uint16_t re_frame_begin_index, re_frame_end_index; // reassembled frame begin index, end index respectively
+ uint16_t start_index, end_index; // start and end sequence numbers available on the fragments array respectively
+ uint32_t M; // Minumum frame sequence number received over all bundle members
+ uint32_t start_seq; // Last received frame sequence number (bearing B bit)
+}
+fragmentationt;
+
#define AUTHPAP 1 // allow PAP
#define AUTHCHAP 2 // allow CHAP
// 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;
// last LCP Echo
time_t last_echo;
+
+ // Last Multilink frame sequence number received
+ uint32_t last_seq;
} sessionlocalt;
// session flags
}
tunnelt;
-// 160 bytes per radius session
+// 164 bytes per radius session
typedef struct // outstanding RADIUS requests
{
sessionidt session; // which session this applies to
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;
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
RADIUSSTOP, // sending stop accounting to RADIUS server
RADIUSINTERIM, // sending interim accounting to RADIUS server
RADIUSWAIT, // waiting timeout before available, in case delayed replies
+ RADIUSJUSTAUTH, // sending auth to RADIUS server, just authentication, no ip assigning
};
struct Tstats
uint16_t radiusport[MAXRADSERVER]; // radius base ports
uint8_t numradiusservers; // radius server count
- uint16_t radius_dae_port; // local port for radius dae
+ uint16_t radius_dae_port; // port for radius DAE
+ uint16_t radius_bind_min; // port range for udp sockets used to send/recv radius packets
+ uint16_t radius_bind_max;
char radius_authtypes_s[32]; // list of valid authentication types (chap, pap) in order of preference
int radius_authtypes;
int radius_authprefer;
int allow_duplicate_users; // allow multiple logins with the same username
+ int kill_timedout_sessions; // kill authenticated sessions with "session_timeout == 0"
in_addr_t default_dns1, default_dns2;
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 lock_pages; // Lock pages into memory.
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
in_addr_t cluster_address; // Multicast address of cluster.
// Send to this address to have everyone hear.
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_master_min_adv; // Master advertises routes while the number of up to date
// slaves is less than this value.
+ // Guest change
+ char guest_user[MAXUSER]; // Guest account username
#ifdef BGP
#define BGP_NUM_PEERS 2
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, in_addr_t ip);
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 *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 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);
+void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local);
// l2tpns.c
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 sessionshutdown(sessionidt s, char *reason, int result, int error);
+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);
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 rebuild_address_pool(void);
extern tunnelt *tunnel;
+extern bundlet *bundle;
extern sessiont *session;
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, t, "Backtrace follows:\n"); \
- size = backtrace(array, 10); \
- strings = backtrace_symbols(array, size); \
- if (strings) for (i = 0; i < size; i++) \
- { \
- LOG(0, 0, t, " %s\n", strings[i]); \
- } \
- free(strings); \
-}
-
extern configt *config;
extern time_t basetime; // Time when this process started.
projects / l2tpns.git / blobdiff