// L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.118 2006/07/01 12:40:17 bodea Exp $
+// $Id: l2tpns.h,v 1.121 2009-12-08 14:49:28 bodea Exp $
#ifndef __L2TPNS_H__
#define __L2TPNS_H__
#include <signal.h>
#include <stdlib.h>
#include <netinet/in.h>
+#include <net/ethernet.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <libcli.h>
-#define VERSION "2.2.0"
+#define VERSION "2.2.1.2fdn3.19"
// 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 MAXBUNDLESES 12 // 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.
+// Tunnel Id reserved for pppoe
+#define TUNNEL_ID_PPPOE 1
+
#define RADIUS_SHIFT 6
#define RADIUS_FDS (1 << RADIUS_SHIFT)
#define RADIUS_MASK ((1 << RADIUS_SHIFT) - 1)
#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 MAXROUTE6 5 // max static Ipv6 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 10 // Time between last packet sent and LCP ECHO generation
-#define IDLE_TIMEOUT 240 // 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 DEFAULT_EPDIS_ADDRESS "L2TPNetServer" // Company name may goes here!
+#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 (MAXFRAGNUM - 1) // Must be equal to MAXFRAGNUM-1
+
+// Multi bind address constants
+#define MAX_UDPFD 4
+#define MAX_BINDADDR MAX_UDPFD
+// + 1 for the LAC Hostname
+#define MAX_NBHOSTNAME (MAX_UDPFD + 1)
+// 4 + 1 for the udplac
+#define INIT_TABUDPFD {-1, -1, -1, -1, -1}
+#define INIT_TABUDPVAR {0, 0, 0, 0, 0}
// Constants
#ifndef ETCDIR
typedef struct // route
{
in_addr_t ip;
- in_addr_t mask;
+ int prefixlen;
}
routet;
+// structures
+typedef struct // route
+{
+ struct in6_addr ipv6route; // Static IPv6 route
+ uint8_t ipv6prefixlen; // IPv6 route prefix length
+}
+routet6;
+
typedef struct controls // control message
{
struct controls *next; // next in queue
} epdist;
typedef struct {
- uint16_t length; // Fragment length
- uint8_t data[MAXFRAGLEN]; // Fragment data
+ 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
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
+ 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)
+ 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;
- 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
+ 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 ipv6prefixlen; // IPv6 route prefix length
- struct in6_addr ipv6route; // Static IPv6 route
- char reserved_3[11]; // Space to expand structure without changing HB_VERSION
+ uint8_t classlen; // class (needed for radius accounting messages)
+ char class[MAXCLASS];
+ sessionidt forwardtosession; // LNS id_session to forward
+ uint8_t src_hwaddr[ETH_ALEN]; // MAC addr source (for pppoe sessions 6 bytes)
+ uint32_t dhcpv6_prefix_iaid; // prefix iaid requested by client
+ uint32_t dhcpv6_iana_iaid; // iaid of iana requested by client
+ struct in6_addr ipv6address; // Framed Ipv6 address
+ struct dhcp6_opt_clientid dhcpv6_client_id; // Size max (headers + DUID)
+ routet6 route6[MAXROUTE6]; // static IPv6 routes
+ char reserved[4]; // 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
+ 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
+ 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;
// 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
#define SESSION_ACFC (1 << 1) // use Address-and-Control-Field-Compression
#define SESSION_STARTED (1 << 2) // RADIUS Start record sent
-// 168 bytes per tunnel
+// 328 bytes per tunnel
typedef struct
{
tunnelidt far; // far end tunnel ID
uint16_t controlc; // outstaind messages in queue
controlt *controls; // oldest message
controlt *controle; // newest message
+ uint16_t isremotelns; // != 0 if the tunnel is to remote LNS (== index on the conf remote lns)
+ uint16_t indexudp; // Index UDP file handle (in udpfd[])
+ char reserved[12]; // Space to expand structure without changing HB_VERSION
}
tunnelt;
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
uint32_t call_processudp;
uint32_t call_sessionbyip;
uint32_t call_sessionbyipv6;
+ uint32_t call_sessionbyipv6new;
uint32_t call_sessionbyuser;
uint32_t call_sendarp;
uint32_t call_sendipcp;
uint32_t call_radiussend;
uint32_t call_radiusretry;
uint32_t call_random_data;
+ uint32_t call_dhcpv6_process;
#endif
};
#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 tundevicename[IFNAMSIZ]; // tun device name
char log_filename[128];
char l2tp_secret[64]; // L2TP shared secret
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
+ int ppp_keepalive; // send echoes regardless
char radiussecret[64];
int radius_accounting;
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
+ int kill_timedout_sessions; // kill authenticated sessions with "session_timeout == 0"
in_addr_t default_dns1, default_dns2;
int num_tbfs; // number of throttle buckets
char accounting_dir[128];
+ int account_all_origin; // Accouting all origin (LAC data + Remote LNS Data + PPPOE data)
in_addr_t bind_address;
in_addr_t peer_address;
int send_garp; // Set to true to garp for vip address on startup
char epdis_addr[20]; // MP Endpoint Discriminator address
in_addr_t cluster_address; // Multicast address of cluster.
+ int cluster_port; // UDP port 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_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.
+
+ 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_number;
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
+ in_addr_t iftun_address;
+ int disable_lac_func;
+ int auth_tunnel_change_addr_src;
+ int highest_rlnsid;
+ uint16_t bind_portremotelns;
+ in_addr_t bind_address_remotelns;
+ char pppoe_if_to_bind[IFNAMSIZ]; // Name pppoe interface to bind
+ char pppoe_service_name[64]; // pppoe service name
+ char pppoe_ac_name[64];
+ uint8_t pppoe_hwaddr[ETH_ALEN]; // MAC addr of interface pppoe to bind
+ int pppoe_only_equal_svc_name; // Accept only PADI with service-name equal to server
+ int disable_sending_hello; // Disable l2tp sending HELLO message for Apple compatibility.
+ int disable_no_spoof; // Disable no spoof (permit load balancing client --> internet)
+ int nbudpfd; // number UDP file handle
+ int nbmultiaddress; // number multi address to bind
+ int indexlacudpfd; // Index UDP LAC file handle (in udpfd[])
+ int nbmultihostname; // number hostname, normally the same number as the nbudpfd
+ int no_throttle_local_IP; // no throttle traffic from session to session
+ in_addr_t bind_n_address[MAX_BINDADDR];
+ in_addr_t iftun_n_address[MAX_BINDADDR];
+ char bind_multi_address[256];
+ char multi_hostname[512];
+ char multi_n_hostname[MAX_NBHOSTNAME][MAXHOSTNAME]; // list hostname
+ struct in6_addr default_ipv6_dns1;
+ struct in6_addr default_ipv6_dns2;
+ uint32_t dhcp6_preferred_lifetime; // preferred lifetime (see rfc3315)
+ uint32_t dhcp6_valid_lifetime; // valid lifetime (see rfc3315)
+ uint32_t dhcp6_server_duid; // DUID of dhcpv6 server (see rfc3315)
+ uint32_t dns6_lifetime; // RDNSS lifetime default 1200 (see rfc6106, rfc4861) (MaxRtrAdvInterval <= Lifetime <= 2*MaxRtrAdvInterval)
+ char default_ipv6_domain_list[255];
} configt;
enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6 };
#define TERM_PORT_REINIT 21
#define TERM_PORT_DISABLED 22
+// on slaves, alow BGP to withdraw cleanly before exiting
+#define QUIT_DELAY 5
+
+// quit actions (master)
+#define QUIT_FAILOVER 1 // SIGTERM: exit when all control messages have been acked (for cluster failover)
+#define QUIT_SHUTDOWN 2 // SIGQUIT: shutdown sessions/tunnels, reject new connections
+
// arp.c
void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip);
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 lcp_restart(sessionidt s);
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 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);
+uint8_t *opt_makeppp(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);
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);
-
+int rad_tunnel_pwdecode(uint8_t *pl2tpsecret, size_t *pl2tpsecretlen, const char *radiussecret, const uint8_t * auth);
// l2tpns.c
clockt backoff(uint8_t try);
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 sessionbyipv6new(struct in6_addr ip);
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 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 processudp(uint8_t *buf, int len, struct sockaddr_in *addr, uint16_t indexudpfd);
+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);
-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);
+int cmd_show_ipcache(struct cli_def *cli, const char *command, char **argv, int argc);
+int cmd_show_hist_idle(struct cli_def *cli, const char *command, char **argv, int argc);
+int cmd_show_hist_open(struct cli_def *cli, const char *command, char **argv, int argc);
+tunnelidt lac_new_tunnel();
+void lac_tunnelclear(tunnelidt t);
+void lac_send_SCCRQ(tunnelidt t, uint8_t * auth, unsigned int auth_len);
+void lac_send_ICRQ(tunnelidt t, sessionidt s);
+void lac_tunnelshutdown(tunnelidt t, char *reason, int result, int error, char *msg);
#undef LOG
#undef LOG_HEX
// 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, ...);
struct event_data {
enum {
- FD_TYPE_CLI,
- FD_TYPE_CLUSTER,
- FD_TYPE_TUN,
- FD_TYPE_UDP,
- FD_TYPE_CONTROL,
- FD_TYPE_DAE,
+ FD_TYPE_CLI,
+ FD_TYPE_CLUSTER,
+ FD_TYPE_TUN,
+ FD_TYPE_UDP,
+ FD_TYPE_CONTROL,
+ FD_TYPE_DAE,
FD_TYPE_RADIUS,
FD_TYPE_BGP,
+ FD_TYPE_NETLINK,
+ FD_TYPE_PPPOEDISC,
+ FD_TYPE_PPPOESESS
} type;
- int index; // for RADIUS, BGP
+ int index; // for RADIUS, BGP, UDP
};
#define TIME (config->current_time)
#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__ */
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