X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/3aa4eda8b1e0c4abc04439affe850d33648c7472..67fb382676922a55ea4e9b3bff5f9a368c8765e7:/l2tpns.h diff --git a/l2tpns.h b/l2tpns.h index e9c5907..b498fd1 100644 --- a/l2tpns.h +++ b/l2tpns.h @@ -1,20 +1,24 @@ // L2TPNS Global Stuff -// $Id: l2tpns.h,v 1.1 2003/12/16 07:07:39 fred_nerk Exp $ +// $Id: l2tpns.h,v 1.6 2004/05/24 04:33:35 fred_nerk Exp $ #include #include - +#include #include "config.h" -#define VERSION "1.0" +#define VERSION "1.2.0" // Limits #define MAXTUNNEL 500 // could be up to 65535 #define MAXSESSION 50000 // could be up to 65535 -#define MAXRADIUS 255 +#define RADIUS_SHIFT 5 +#define RADIUS_MASK ((unsigned short)(((unsigned short)~0) >> (16 - RADIUS_SHIFT))) +#define MAXRADIUS ((2 << (RADIUS_SHIFT - 1)) * 255) + #define MAXCONTROL 1000 // max length control message we ever send... #define MAXETHER (1500+18) // max packet we try sending to tap #define MAXTEL 96 // telephone number +#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 @@ -27,17 +31,17 @@ #define STATISTICS #define STAT_CALLS #define RINGBUFFER -#define UDP 17 #define TAPDEVICE "/dev/net/tun" -#define CLIUSERS ETCDIR "l2tpns.users" // CLI Users file -#define CONFIGFILE ETCDIR "l2tpns.cfg" // Configuration file -#define IPPOOLFILE ETCDIR "l2tpns.ip_pool" // Address pool configuration -#define STATEFILE "/tmp/l2tpns.dump" // State dump file - +#define UDP 17 +#define HOMEDIR "/home/l2tpns/" // Base dir for data +#define STATEFILE "/tmp/l2tpns.dump" // State dump file +#define NOSTATEFILE "/tmp/l2tpns.no_state_reload" // If exists, state will not be reloaded +#define CONFIGFILE ETCDIR "/l2tpns.cfg" // Configuration file +#define CLIUSERS ETCDIR "/l2tpns.users" // CLI Users file +#define IPPOOLFILE ETCDIR "/l2tpns.ip_pool" // Address pool configuration #ifndef LIBDIR #define LIBDIR "/usr/lib/l2tpns" #endif - #define ACCT_TIME 3000 // 5 minute accounting interval #define L2TPPORT 1701 // L2TP port #define RADPORT 1645 // old radius port... @@ -52,20 +56,21 @@ #define PPPCCP 0x80FD #define PPPIP 0x0021 #define PPPMP 0x003D -#define ConfigReq 1 -#define ConfigAck 2 -#define ConfigNak 3 -#define ConfigRej 4 -#define TerminateReq 5 -#define TerminateAck 6 -#define CodeRej 7 -#define ProtocolRej 8 -#define EchoReq 9 -#define EchoReply 10 -#define DiscardRequest 11 - -#undef TC_TBF -#define TC_HTB +#define MIN_IP_SIZE 0x20 +enum +{ + ConfigReq = 1, + ConfigAck, + ConfigNak, + ConfigRej, + TerminateReq, + TerminateAck, + CodeRej, + ProtocolRej, + EchoReq, + EchoReply, + DiscardRequest +}; // Types typedef unsigned short u16; @@ -78,6 +83,9 @@ typedef u16 tunnelidt; typedef u32 clockt; typedef u8 hasht[16]; +// dump header: update number if internal format changes +#define DUMP_MAGIC "L2TPNS#" VERSION "#" + // structures typedef struct routes // route { @@ -88,7 +96,7 @@ routet; typedef struct controls // control message { - struct controls *next; // next in queue + struct controls *next; // next in queue u16 length; // length u8 buf[MAXCONTROL]; } @@ -96,44 +104,45 @@ controlt; typedef struct stbft { - struct stbft *next; char handle[10]; char in_use; - int mark; } tbft; // 336 bytes per session typedef struct sessions { - 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 - 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 id; // session id - 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 - routet route[MAXROUTE]; // static routes - u8 radius; // which radius session is being used (0 for not waiting on authentication) - u8 flags; // various bit flags - u8 snoop; // are we snooping this session? - u8 throttle; // is this session throttled? - u8 walled_garden; // is this session stuck in the walled garden? - u16 mru; // maximum receive unit - u16 tbf; // filter bucket for throttling + 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 + 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 + 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 + routet route[MAXROUTE]; // static routes + u16 radius; // which radius session is being used (0 for not waiting on authentication) + u8 flags; // various bit flags + u8 snoop; // are we snooping this session? + u8 throttle; // is this session throttled? + u8 walled_garden; // is this session gardened? + u16 mru; // maximum receive unit + u16 tbf; // filter bucket for throttling char random_vector[MAXTEL]; int random_vector_length; - char user[129]; // user (needed in seesion for radius stop messages) - char called[MAXTEL]; // called number - char calling[MAXTEL]; // calling number + char user[129]; // user (needed in seesion for radius stop messages) + char called[MAXTEL]; // called number + char calling[MAXTEL]; // calling number unsigned long tx_connect_speed; unsigned long rx_connect_speed; } @@ -145,16 +154,17 @@ sessiont; // 168 bytes per tunnel typedef struct tunnels { - tunnelidt next; // next tunnel in linked list 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 + 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 die; // being closed, when to finally free + 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 @@ -165,25 +175,27 @@ typedef struct tunnels tunnelt; // 180 bytes per radius session -typedef struct radiuss // outstanding RADIUS requests +typedef struct radiuss // outstanding RADIUS requests { - u8 next; // next in free list - sessionidt session; // which session this applies to - hasht auth; // request authenticator - clockt retry; // ehwne 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) + 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) } radiust; typedef struct { - ipt address; - char assigned; // 1 if assigned, 0 if free + ipt address; + char assigned; // 1 if assigned, 0 if free + sessionidt session; + clockt last; // last used + char user[129]; // user (try to have ip addresses persistent) } ippoolt; @@ -202,15 +214,27 @@ struct Tringbuffer }; #endif +/* + * Possible tunnel states + * TUNNELFREE -> TUNNELOPEN -> TUNNELDIE -> TUNNELFREE + */ enum { - RADIUSNULL, // Not in use - RADIUSCHAP, // sending CHAP down PPP - RADIUSAUTH, // sending auth to RADIUS server - RADIUSIPCP, // sending IPCP to end user - RADIUSSTART, // sending start accounting to RADIUS server - RADIUSSTOP, // sending stop accounting to RADIUS server - RADIUSWAIT // waiting timeout before available, in case delayed replies + TUNNELFREE, // Not in use + TUNNELOPEN, // Active tunnel + TUNNELDIE, // Currently closing + TUNNELOPENING // Busy opening +}; + +enum +{ + RADIUSNULL, // Not in use + RADIUSCHAP, // sending CHAP down PPP + RADIUSAUTH, // sending auth to RADIUS server + RADIUSIPCP, // sending IPCP to end user + RADIUSSTART, // sending start accounting to RADIUS server + RADIUSSTOP, // sending stop accounting to RADIUS server + RADIUSWAIT // waiting timeout before available, in case delayed replies }; struct Tstats @@ -297,6 +321,54 @@ struct Tstats #define SET_STAT(x, y) #endif +struct configt +{ + int debug; // debugging level + time_t start_time; // time when l2tpns was started + char bandwidth[256]; // current bandwidth + + char config_file[128]; + int reload_config; // flag to re-read config (set by cli) + int cleanup_interval; // interval between regular cleanups (in seconds) + int multi_read_count; // amount of packets to read per fd in processing loop + + char tapdevice[10]; // tap device name + char log_filename[128]; + char l2tpsecret[64]; + + char radiussecret[64]; + int radius_accounting; + ipt radiusserver[MAXRADSERVER]; // radius servers + u8 numradiusservers; // radius server count + short num_radfds; // Number of radius filehandles allocated + + ipt default_dns1, default_dns2; + + ipt snoop_destination_host; + u16 snoop_destination_port; + + unsigned long rl_rate; + int save_state; + uint32_t cluster_address; + int ignore_cluster_updates; + char accounting_dir[128]; + ipt bind_address; + int target_uid; + int dump_speed; + char plugins[64][MAXPLUGINS]; + char old_plugins[64][MAXPLUGINS]; + + int next_tbf; // Next HTB id available to use +}; + +struct config_descriptt +{ + char *key; + int offset; + int size; + enum { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP } type; +}; + // arp.c void sendarp(int ifr_idx, const unsigned char* mac, ipt ip); @@ -317,10 +389,11 @@ void dumplcp(char *p, int l); // radius.c void initrad(void); -void radiussend(u8 r, u8 state); -void processrad(u8 *buf, int len); -void radiusretry(u8 r); -u8 radiusnew(sessionidt s); +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); @@ -343,7 +416,6 @@ void initudp(void); void initdata(void); void initippool(); sessionidt sessionbyip(ipt ip); -/* NB - sessionbyuser ignores walled garden'd sessions */ sessionidt sessionbyuser(char *username); void sessionshutdown(sessionidt s, char *reason); void sessionsendarp(sessionidt s); @@ -365,25 +437,25 @@ void processarp(u8 * buf, int len); void processudp(u8 * buf, int len, struct sockaddr_in *addr); void processtap(u8 * buf, int len); void processcontrol(u8 * buf, int len, struct sockaddr_in *addr); -ipt assign_ip_address(); -void free_ip_address(ipt address); +int assign_ip_address(sessionidt s); +void free_ip_address(sessionidt s); void snoop_send_packet(char *packet, u16 size); void dump_acct_info(); void mainloop(void); #define log _log #ifndef log_hex -#define log_hex(a,b,c,d) do{if (a <= debug) _log_hex(a,0,0,0,b,c,d);}while (0) +#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, ...); +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); int sessionsetup(tunnelidt t, sessionidt s, u8 routes); int cluster_send_session(int s); int cluster_send_tunnel(int t); -#ifdef HAVE_LIBCLI +int cluster_send_goodbye(); void init_cli(); +void cli_do_file(FILE *fh); void cli_do(int sockfd); -#endif #ifdef RINGBUFFER void ringbuffer_dump(FILE *stream); #endif @@ -391,3 +463,25 @@ void initplugins(); int run_plugins(int plugin_type, void *data); void add_plugin(char *plugin_name); void remove_plugin(char *plugin_name); +void tunnelclear(tunnelidt t); +void host_unreachable(ipt destination, u16 id, ipt source, char *packet, int packet_len); + +extern tunnelt *tunnel; +extern sessiont *session; +#define sessionfree (session[0].next) + +#define log_backtrace(count, max) \ +if (count++ < max) { \ + void *array[20]; \ + char **strings; \ + int size, i; \ + log(0, 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]); \ + } \ + free(strings); \ +} +