X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/6e3d21bbdc2e1cbf4627bd2c6c9f9cbeb19bf9c7..6b1075b65c4239e97629f3a891f49f5ae9ef3d4b:/l2tpns.h diff --git a/l2tpns.h b/l2tpns.h index 83b0e8b..db96836 100644 --- a/l2tpns.h +++ b/l2tpns.h @@ -1,5 +1,5 @@ // L2TPNS Global Stuff -// $Id: l2tpns.h,v 1.15 2004/08/02 05:40:21 fred_nerk Exp $ +// $Id: l2tpns.h,v 1.47 2004/12/16 08:49:53 bodea Exp $ #ifndef __L2TPNS_H__ #define __L2TPNS_H__ @@ -15,7 +15,7 @@ #include #include -#define VERSION "2.0.1" +#define VERSION "2.0.13" // Limits #define MAXTUNNEL 500 // could be up to 65535 @@ -24,7 +24,7 @@ #define RADIUS_SHIFT 5 #define RADIUS_MASK ((unsigned short)(((unsigned short)~0) >> (16 - RADIUS_SHIFT))) -#define MAXRADIUS ((2 << (RADIUS_SHIFT - 1)) * 255) +#define MAXRADIUS ((unsigned long)(1L << RADIUS_SHIFT) * 255) #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. @@ -40,31 +40,44 @@ #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 BUSY_WAIT_TIME 3000 // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown // 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 DATADIR -#define DATADIR "/tmp" +#ifndef STATEDIR +#define STATEDIR "/var/lib/l2tpns" +#endif + +#ifndef PLUGINDIR +#define PLUGINDIR LIBDIR // Plugins +#endif + +#ifndef PLUGINCONF +#define PLUGINCONF ETCDIR // Plugin config dir #endif #ifndef FLASHDIR #define FLASHDIR ETCDIR #endif +#ifndef DATADIR +#define DATADIR STATEDIR +#endif + #define TUNDEVICE "/dev/net/tun" #define STATEFILE DATADIR "/state.dump" // State dump file #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 ACCT_SHUT_TIME 600 // 1 minute for counters of shutdown sessions #define L2TPPORT 1701 // L2TP port #define RADPORT 1645 // old radius port... #define PKTARP 0x0806 // ARP packet type @@ -95,22 +108,20 @@ enum }; // 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 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 @@ -118,6 +129,8 @@ struct cli_session_actions { #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; @@ -129,84 +142,91 @@ struct cli_tunnel_actions { #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 { 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 + 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. + unsigned long unique_id; // unique session id + uint16_t nr; // next receive + uint16_t ns; // next send + uint32_t magic; // ppp magic number + uint32_t cin, cout; // byte counts + uint32_t pin, pout; // packet counts + uint32_t total_cin; // This counter is never reset while a session is open + uint32_t total_cout; // This counter is never reset while a session is open + uint32_t id; // session id + uint16_t throttle_in; // upstream throttle rate (kbps) + uint16_t throttle_out; // downstream throttle rate clockt opened; // when started clockt die; // being closed, when to finally free time_t last_packet; // Last packet from the user (used for idle timeouts) - ipt dns1, dns2; // DNS servers + 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); + uint16_t radius; // which radius session is being used (0 for not waiting on authentication) + uint16_t mru; // maximum receive unit + uint16_t tbf_in; // filter bucket for throttling in from the user. + uint16_t tbf_out; // filter bucket for throttling out to the user. + uint8_t l2tp_flags; // various bit flags from the ICCN on the l2tp tunnel. + uint8_t reserved_old_snoop; // No longer used - remove at some time + uint8_t walled_garden; // is this session gardened? + uint8_t flags1; // additional flags (currently unused); char random_vector[MAXTEL]; int random_vector_length; char user[129]; // user (needed in seesion for radius stop messages) (can we reduce this? --mo) 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; + uint32_t flags; // Various session flags. + in_addr_t snoop_ip; // Interception destination IP + uint16_t snoop_port; // Interception destination port + uint16_t sid; // near end session id. + uint8_t filter_in; // input filter index (to ip_filters[N-1]; 0 if none) + uint8_t filter_out; // output filter index + char reserved[18]; // Space to expand structure without changing HB_VERSION } sessiont; -#define SF_IPCP_ACKED (1<<0) // Has this session seen an IPCP Ack? +#define SF_IPCP_ACKED 1 // Has this session seen an IPCP Ack? +#define SF_LCP_ACKED 2 // LCP negotiated +#define SF_CCP_ACKED 4 // CCP negotiated -typedef struct { - u32 cin; - u32 cout; +typedef struct +{ + uint32_t cin; + uint32_t cout; } sessioncountt; -#define SESSIONPFC 1 // PFC negotiated flags -#define SESSIONACFC 2 // ACFC negotiated flags -#define SESSIONLCPACK 4 // LCP negotiated +#define SESSIONPFC 1 // PFC negotiated flags +#define SESSIONACFC 2 // ACFC negotiated flags // 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 @@ -214,31 +234,31 @@ typedef struct tunnels 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 +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) } 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 @@ -253,7 +273,6 @@ struct Tringbuffer char level; sessionidt session; tunnelidt tunnel; - ipt address; char message[MAX_LOG_LENGTH]; } buffer[RINGBUFFER_SIZE]; int head; @@ -376,7 +395,7 @@ struct Tstats #define SET_STAT(x, y) #endif -struct configt +typedef struct { int debug; // debugging level time_t start_time; // time when l2tpns was started @@ -398,17 +417,20 @@ struct configt char radiussecret[64]; int radius_accounting; - ipt radiusserver[MAXRADSERVER]; // radius servers - u16 radiusport[MAXRADSERVER]; // radius base ports - u8 numradiusservers; // radius server count + in_addr_t radiusserver[MAXRADSERVER]; // radius servers + uint16_t radiusport[MAXRADSERVER]; // radius base ports + uint8_t numradiusservers; // radius server count short num_radfds; // Number of radius filehandles allocated - ipt default_dns1, default_dns2; + 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; @@ -421,12 +443,12 @@ struct configt int lock_pages; // Lock pages into memory. int icmp_rate; // Max number of ICMP unreachable per second to send> - 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). @@ -439,130 +461,149 @@ struct configt 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 #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, IP, MAC }; +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; // 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 processpap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); +void processchap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); +void processlcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); +void processipcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); +void processipin(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); +void processccp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t 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); +uint8_t *makeppp(uint8_t *b, int size, uint8_t *p, int l, tunnelidt t, sessionidt s, uint16_t mtype); void initlcp(tunnelidt t, sessionidt s); -void dumplcp(u8 *p, int l); +void send_ipin(sessionidt s, uint8_t *buf, int len); // 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); // 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); +sessionidt sessionbyip(in_addr_t ip); sessionidt sessionbyuser(char *username); void sessionshutdown(sessionidt s, char *reason); -void sessionsendarp(sessionidt s); -void send_garp(ipt ip); -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 send_garp(in_addr_t ip); +void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t); 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 processudp(uint8_t *buf, int len, struct sockaddr_in *addr); +void snoop_send_packet(char *packet, uint16_t size, in_addr_t destination, uint16_t port); +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); +#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 char *data, int maxsize); + 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); 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, char *packet, int packet_len); + + extern tunnelt *tunnel; extern sessiont *session; extern sessioncountt *sess_count; @@ -574,24 +615,25 @@ if (count++ < max) { \ void *array[20]; \ char **strings; \ int size, i; \ - log(0, 0, 0, t, "Backtrace follows"); \ + LOG(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]); \ + LOG(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 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 tun_write(uint8_t *data, int size); +extern int clifd; #define TIME (config->current_time)