// L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.113.2.3 2006/12/02 14:09:14 bodea Exp $
+// $Id: l2tpns.h,v 1.121 2009-12-08 14:49:28 bodea Exp $
#ifndef __L2TPNS_H__
#define __L2TPNS_H__
#include <sys/types.h>
#include <libcli.h>
-#define VERSION "2.1.21"
+#define VERSION "2.2.1"
// 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 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 MAXHOSTNAME 256 // hostname
#define MAXUSER 128 // username
#define MAXPASS 128 // password
+#define MAXCLASS 128 // radius class attribute size
#define MAXPLUGINS 20 // maximum number of plugins to load
#define MAXRADSERVER 10 // max radius servers
#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 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_ECHO_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 1496 // Maximum length for Multilink fragment (The multilink may contain only one link)
+#define MAXFRAGNUM 512 // 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 511 // Must be equal to MAXFRAGNUM-1
+
// Constants
#ifndef ETCDIR
#define ETCDIR "/etc/l2tpns"
// Types
typedef uint16_t sessionidt;
+typedef uint16_t bundleidt;
typedef uint16_t tunnelidt;
typedef uint32_t clockt;
typedef uint8_t hasht[16];
typedef struct // route
{
in_addr_t ip;
- in_addr_t mask;
+ int prefixlen;
}
routet;
{
struct controls *next; // next in queue
uint16_t length; // length
- uint8_t buf[MAXCONTROL];
+ union {
+ uint8_t buf[MAXCONTROL];
+ uint16_t buf16[MAXCONTROL/2];
+ } __attribute__ ((__transparent_union__));
}
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
+ tunnelidt tid; // Fragment originating tunnel
+ uint8_t flags; // MP frame flags
+ uint32_t seq; // fragment seq num
+ uint32_t jitteravg;
+ uint16_t length; // Fragment length
+ uint8_t data[MAXFRAGLEN]; // Fragment data
+} fragmentt;
+
typedef struct
{
sessionidt next; // next session in linked list
uint8_t ipv6cp:4; // IPV6CP state
uint8_t ccp:4; // CCP state
} ppp;
- char reserved_1[2]; // unused: padding
+ uint16_t mru; // maximum receive unit
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
- 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
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
+ uint16_t snoop_port; // Interception destination port
+ in_addr_t snoop_ip; // Interception destination IP
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.
uint16_t tbf_out; // filter bucket for throttling out to the user.
int random_vector_length;
uint8_t random_vector[MAXTEL];
- char user[MAXUSER]; // user (needed in seesion for radius stop messages)
+ char user[MAXUSER]; // user (needed in session for radius stop messages)
char called[MAXTEL]; // called number
char calling[MAXTEL]; // calling number
uint32_t tx_connect_speed;
uint32_t rx_connect_speed;
- in_addr_t snoop_ip; // Interception destination IP
- uint16_t snoop_port; // Interception destination port
+ clockt timeout; // Session timeout
+ uint32_t mrru; // Multilink Max-Receive-Reconstructed-Unit
+ epdist epdis; // Multilink Endpoint Discriminator
+ bundleidt bundle; // Multilink Bundle Identifier
+ uint8_t mssf; // Multilink Short Sequence Number Header Format
uint8_t walled_garden; // is this session gardened?
+ uint8_t classlen; // class (needed for radius accounting messages)
+ char class[MAXCLASS];
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
+ char reserved[12]; // 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 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;
+
+ // jitter average of the session
+ uint32_t jitteravg;
+ // time in milliseconds of the last fragment.
+ uint64_t prev_time;
} sessionlocalt;
// session flags
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
#define SET_STAT(x, y)
#endif
+#ifndef IFNAMSIZ
+# define IFNAMSIZ 16
+#endif
+
typedef struct
{
int debug; // debugging level
int reload_config; // flag to re-read config (set by cli)
int multi_read_count; // amount of packets to read per fd in processing loop
- char tundevice[10]; // tun device name
+ char tundevice[IFNAMSIZ]; // tun device name
char log_filename[128];
char l2tp_secret[64]; // L2TP shared secret
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.
+ in_addr_t cli_bind_address; // bind address for CLI
+ char hostname[MAXHOSTNAME]; // hostname (overridden by -h on command line)
+ // Guest change
+ char guest_user[MAXUSER]; // Guest account username
#ifdef BGP
#define BGP_NUM_PEERS 2
uint16_t as;
int keepalive;
int hold;
+ struct in_addr update_source;
} neighbour[BGP_NUM_PEERS];
+ in_addr_t nexthop_address;
+ struct in6_addr nexthop6_address;
#endif
+
+ int echo_timeout; // Time between last packet sent and LCP ECHO generation
+ int idle_echo_timeout; // Time between last packet seen and
+ // Drop sessions who have not responded within IDLE_ECHO_TIMEOUT seconds
} configt;
enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6 };
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 sendipcp(sessionidt s, tunnelidt t);
void sendipv6cp(sessionidt s, tunnelidt t);
void processudp(uint8_t *buf, int len, struct sockaddr_in *addr);
+void processipout(uint8_t *buf, int len);
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);
// cli.c
-void init_cli(char *hostname);
+void init_cli();
+void cli_init_complete(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, ...);
extern tunnelt *tunnel;
+extern bundlet *bundle;
extern sessiont *session;
extern sessionlocalt *sess_local;
extern ippoolt *ip_address_pool;
FD_TYPE_DAE,
FD_TYPE_RADIUS,
FD_TYPE_BGP,
+ FD_TYPE_NETLINK,
} type;
int index; // for RADIUS, BGP
};
#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)
-// CVS identifiers (for "show version file")
-extern char const *cvs_id_arp;
-extern char const *cvs_id_cli;
-extern char const *cvs_id_cluster;
-extern char const *cvs_id_constants;
-extern char const *cvs_id_control;
-extern char const *cvs_id_icmp;
-extern char const *cvs_id_l2tpns;
-extern char const *cvs_id_ll;
-extern char const *cvs_id_md5;
-extern char const *cvs_id_ppp;
-extern char const *cvs_id_radius;
-extern char const *cvs_id_tbf;
-extern char const *cvs_id_util;
-
#endif /* __L2TPNS_H__ */
projects / l2tpns.git / blobdiff