X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/3efd4f877afa6dbf12370e0be76921cd0b1037df..d0f3d94dc2c9290c0bbd531c9c89fcc38838292d:/l2tpns.h?ds=sidebyside
diff --git a/l2tpns.h b/l2tpns.h
index 49c9a77..3ad2cf5 100644
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,11 +1,10 @@
// L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.84 2005/08/24 23:44:08 bodea Exp $
+// $Id: l2tpns.h,v 1.116 2006/04/27 14:37:28 bodea Exp $
#ifndef __L2TPNS_H__
#define __L2TPNS_H__
#include <netinet/in.h>
-#include <execinfo.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
@@ -15,36 +14,49 @@
#include <sys/types.h>
#include <libcli.h>
-#define VERSION "2.1.4"
+#define VERSION "2.2.0"
// Limits
#define MAXTUNNEL 500 // 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 6
-#define RADIUS_FDS (1 << RADIUS_SHIFT)
+#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 DEFAULT_MRU 1452 // maximum packet size to avoid fragmentation when LNS ethernet MTU is 1500
+
+#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
#ifndef ETCDIR
@@ -74,18 +86,18 @@
#define IPPOOLFILE FLASHDIR "/ip_pool" // Address pool configuration
#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 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 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
@@ -146,7 +158,23 @@ enum {
// reset state machine counters
#define initialise_restart_count(_s, _fsm) \
- sess_local[_s]._fsm.conf_sent = sess_local[_s]._fsm.nak_sent
+ 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) ({ \
@@ -169,6 +197,7 @@ enum {
// Types
typedef uint16_t sessionidt;
+typedef uint16_t bundleidt;
typedef uint16_t tunnelidt;
typedef uint32_t clockt;
typedef uint8_t hasht[16];
@@ -214,25 +243,35 @@ typedef struct controls // control message
}
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 {
+ 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; // near end tunnel ID
- uint8_t l2tp_flags; // various bit flags from the ICCN on the l2tp tunnel.
+ 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
- uint8_t pad; // unused
} 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
uint32_t unique_id; // unique session id
- uint16_t nr; // next receive
- uint16_t ns; // next send
+ 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
@@ -257,15 +296,47 @@ typedef struct
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?
uint8_t ipv6prefixlen; // IPv6 route prefix length
struct in6_addr ipv6route; // Static IPv6 route
- char reserved[11]; // Space to expand structure without changing HB_VERSION
+ char reserved_3[11]; // Space to expand structure without changing HB_VERSION
}
sessiont;
+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;
+
#define AUTHPAP 1 // allow PAP
#define AUTHCHAP 2 // allow CHAP
@@ -286,9 +357,24 @@ typedef struct
int nak_sent;
} lcp, ipcp, ipv6cp, ccp;
+ // identifier for Protocol-Reject, Code-Reject
+ uint8_t lcp_ident;
+
// authentication to use
int lcp_authtype;
+ // 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;
@@ -299,10 +385,15 @@ typedef struct
// interim RADIUS
time_t last_interim;
+
+ // last LCP Echo
+ time_t last_echo;
} sessionlocalt;
-#define SESSIONPFC 1 // PFC negotiated flags
-#define SESSIONACFC 2 // ACFC negotiated flags
+// 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
@@ -315,7 +406,7 @@ typedef struct
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
@@ -327,7 +418,7 @@ typedef struct
}
tunnelt;
-// 160 bytes per radius session
+// 164 bytes per radius session
typedef struct // outstanding RADIUS requests
{
sessionidt session; // which session this applies to
@@ -338,6 +429,8 @@ typedef struct // outstanding RADIUS requests
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;
@@ -378,6 +471,23 @@ enum
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
@@ -508,7 +618,9 @@ typedef struct
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
@@ -530,6 +642,7 @@ typedef struct
int radius_authprefer;
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;
@@ -541,7 +654,6 @@ typedef struct
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];
@@ -552,6 +664,7 @@ typedef struct
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.
@@ -563,23 +676,24 @@ typedef struct
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
-
- struct in6_addr ipv6_prefix; // Our IPv6 network pool.
-
-
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
#define BGP_NUM_PEERS 2
uint16_t as_number;
@@ -592,7 +706,7 @@ typedef struct
#endif
} configt;
-enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6, MAC };
+enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6 };
typedef struct
{
char *key;
@@ -653,6 +767,36 @@ typedef struct
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);
@@ -665,13 +809,17 @@ 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);
-void sendlcp(sessionidt s, tunnelidt t, int authtype);
+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
@@ -681,7 +829,7 @@ 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);
+void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local);
// l2tpns.c
@@ -694,10 +842,12 @@ sessionidt sessionbyuser(char *username);
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);
+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);
@@ -716,6 +866,7 @@ int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc
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);
@@ -736,26 +887,12 @@ void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, uint
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.
@@ -764,7 +901,6 @@ extern char main_quit;
extern uint32_t last_id;
extern struct Tstats *_statistics;
extern in_addr_t my_address;
-extern int tun_write(uint8_t *data, int size);
extern int clifd;
extern int epollfd;
@@ -784,6 +920,9 @@ struct event_data {
#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)