X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/892241efbb520fc6faf20ed0f694894433e5558e..3175a088324635b8e1e185da1b52b8424c7c9ca7:/l2tpns.h diff --git a/l2tpns.h b/l2tpns.h index cfeb860..ef91cf3 100644 --- a/l2tpns.h +++ b/l2tpns.h @@ -1,5 +1,5 @@ // L2TPNS Global Stuff -// $Id: l2tpns.h,v 1.19 2004-10-04 23:34:07 fred_nerk Exp $ +// $Id: l2tpns.h,v 1.41 2004-11-29 02:17:17 bodea Exp $ #ifndef __L2TPNS_H__ #define __L2TPNS_H__ @@ -15,7 +15,7 @@ #include #include -#define VERSION "2.0.1" +#define VERSION "2.0.9" // Limits #define MAXTUNNEL 500 // could be up to 65535 @@ -40,26 +40,37 @@ #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_TIMEOUT 3000 // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown +#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 @@ -111,7 +122,10 @@ struct cli_session_actions { char action; ipt snoop_ip; u16 snoop_port; - int throttle; + int throttle_in; + int throttle_out; + int filter_in; + int filter_out; }; #define CLI_SESS_KILL 0x01 @@ -119,6 +133,8 @@ 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; @@ -130,7 +146,7 @@ struct cli_tunnel_actions { #define DUMP_MAGIC "L2TPNS#" VERSION "#" // structures -typedef struct routes // route +typedef struct // route { ipt ip; ipt mask; @@ -145,7 +161,7 @@ typedef struct controls // control message } controlt; -typedef struct sessions +typedef struct { sessionidt next; // next session in linked list sessionidt far; // far end session ID @@ -161,7 +177,8 @@ typedef struct sessions 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. + u16 throttle_in; // upstream throttle rate (kbps) + u16 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) @@ -186,23 +203,27 @@ typedef struct sessions ipt snoop_ip; // Interception destination IP u16 snoop_port; // Interception destination port u16 sid; // near end session id. - char reserved[20]; // Space to expand structure without changing HB_VERSION + u8 filter_in; // input filter index (to ip_filters[N-1]; 0 if none) + u8 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 { +typedef struct +{ u32 cin; u32 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 @@ -225,7 +246,7 @@ typedef struct tunnels 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 @@ -256,7 +277,6 @@ struct Tringbuffer char level; sessionidt session; tunnelidt tunnel; - ipt address; char message[MAX_LOG_LENGTH]; } buffer[RINGBUFFER_SIZE]; int head; @@ -379,7 +399,7 @@ 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 @@ -408,10 +428,13 @@ struct configt ipt default_dns1, default_dns2; - unsigned long rl_rate; + unsigned long rl_rate; // default throttle rate + int num_tbfs; // number of throttle buckets + int save_state; char accounting_dir[128]; ipt bind_address; + ipt peer_address; int send_garp; // Set to true to garp for vip address on startup int target_uid; @@ -444,20 +467,77 @@ struct configt int cluster_hb_timeout; // How many missed heartbeats trigger an election. #ifdef BGP +#define BGP_NUM_PEERS 2 u16 as_number; - char bgp_peer[2][64]; - u16 bgp_peer_as[2]; + struct { + char name[64]; + u16 as; + int keepalive; + int hold; + } neighbour[BGP_NUM_PEERS]; #endif - char hostname[256]; // our hostname - set to gethostname() by default -}; +} 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, MAC } type; -}; + enum config_typet type; +} config_descriptt; + +typedef struct +{ + u8 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 + portt port; // port (host byte order) + portt port2; // range +} ip_filter_portt; + +typedef struct +{ + int action; // permit/deny +#define FILTER_ACTION_DENY 1 +#define FILTER_ACTION_PERMIT 2 + u8 proto; // protocol: IPPROTO_* (netinet/in.h) + ipt src_ip; // source ip (network byte order) + ipt src_wild; + ip_filter_portt src_ports; + ipt dst_ip; // dest ip + ipt dst_wild; + ip_filter_portt dst_ports; + u8 frag; // apply to non-initial fragments + u8 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 + u8 tcp_sflags; // flags set + u8 tcp_cflags; // flags clear + u32 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); @@ -472,9 +552,8 @@ void processipin(tunnelidt t, sessionidt s, u8 * p, u16 l); void processccp(tunnelidt t, sessionidt s, u8 * p, u16 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); void initlcp(tunnelidt t, sessionidt s); -void dumplcp(u8 *p, int l); +void send_ipin(sessionidt s, u8 * buf, int len); // radius.c @@ -485,88 +564,49 @@ 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); - // 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); 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 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); +int ip_filter(u8 *buf, int len, u8 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(); -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(ipt destination, u16 id, ipt source, char *packet, int packet_len); + + extern tunnelt *tunnel; extern sessiont *session; extern sessioncountt *sess_count; @@ -578,24 +618,25 @@ 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_id; extern struct Tstats *_statistics; extern ipt my_address; extern int tun_write(u8 *data, int size); +extern int clifd; #define TIME (config->current_time)