3 /* This file is part of the Project Athena Zephyr Notification System.
4 * It contains declarations for use in the server.
6 * Created by: John T. Kohl
8 * $Source: /afs/dev.mit.edu/source/repository/athena/lib/zephyr/server/zserver.h,v $
10 * $Zephyr: /mit/zephyr/src/server/RCS/zserver.h,v 1.34 91/03/08 12:53:24 raeburn Exp $
12 * Copyright (c) 1987,1988,1991 by the Massachusetts Institute of Technology.
13 * For copying and distribution information, see the file
17 #include <zephyr/mit-copyright.h>
23 #include <arpa/inet.h>
28 #include "zsrv_conf.h" /* configuration params */
34 #if defined(HAVE_KRB5) || defined(HAVE_KRB4)
35 /* Kerberos-specific library interfaces used only by the server. */
37 extern krb5_keyblock *__Zephyr_keyblock;
38 #define ZGetSession() (__Zephyr_keyblock)
39 void ZSetSession(krb5_keyblock *keyblock);
40 Code_t ZFormatAuthenticNoticeV5 __P((ZNotice_t*, char*, int, int*, krb5_keyblock *));
41 krb5_error_code Z_krb5_init_keyblock(krb5_context, krb5_enctype, size_t,
44 extern C_Block __Zephyr_session;
45 #define ZGetSession() (__Zephyr_session)
47 void ZSetSessionDES(C_Block *key);
49 Code_t ZFormatAuthenticNotice __P((ZNotice_t*, char*, int, int*, C_Block));
52 /* For krb_rd_req prototype and definition. */
54 #define KRB_INT32 ZEPHYR_INT32
57 /* These macros are for insertion into and deletion from a singly-linked list
58 * with back pointers to the previous element's next pointer. In order to
59 * make these macros act like expressions, they use the comma operator for
60 * sequenced evaluations of assignment, and "a && b" for "evaluate assignment
61 * b if expression a is true". */
62 #define LIST_INSERT(head, elem) \
63 ((elem)->next = *(head), \
64 (*head) && ((*(head))->prev_p = &(elem)->next), \
65 (*head) = (elem), (elem)->prev_p = (head))
66 #define LIST_DELETE(elem) \
67 (*(elem)->prev_p = (elem)->next, \
68 (elem)->next && ((elem)->next->prev_p = (elem)->prev_p))
70 /* Current time as cached by main(); use instead of time(). */
71 #define NOW t_local.tv_sec
75 /* Kerberos shouldn't stick us with array types... */
82 typedef struct _Destination Destination;
83 typedef struct _Destlist Destlist;
84 typedef struct _ZRealm ZRealm;
85 typedef struct _ZRealmname ZRealmname;
86 typedef enum _ZRealm_state ZRealm_state;
87 typedef struct _Client Client;
88 typedef struct _Triplet Triplet;
89 typedef enum _Server_state Server_state;
90 typedef struct _Unacked Unacked;
91 typedef struct _Pending Pending;
92 typedef struct _Server Server;
93 typedef enum _Sent_type Sent_type;
94 typedef struct _Statistic Statistic;
104 struct _Destlist *next, **prev_p;
108 REALM_UP, /* ZRealm is up */
109 REALM_TARDY, /* ZRealm due for a hello XXX */
110 REALM_DEAD, /* ZRealm is considered dead */
111 REALM_STARTING /* ZRealm is between dead and up */
117 struct sockaddr_in *addrs;
118 int idx; /* which server we are connected to */
119 Destlist *subs; /* what their clients sub to */
120 Destlist *remsubs; /* our subs on their end */
135 struct sockaddr_in addr; /* ipaddr/port of client */
136 Destlist *subs ; /* subscriptions */
138 krb5_keyblock *session_keyblock;
141 C_Block session_key; /* session key for this client */
142 #endif /* HAVE_KRB4 */
144 String *principal; /* krb principal of user */
145 int last_send; /* Counter for last sent packet. */
146 time_t last_ack; /* Time of last received ack */
148 struct _Client *next, **prev_p;
156 struct _Triplet *next, **prev_p;
160 SERV_UP, /* Server is up */
161 SERV_TARDY, /* Server due for a hello */
162 SERV_DEAD, /* Server is considered dead */
163 SERV_STARTING /* Server is between dead and up */
167 Timer *timer; /* timer for retransmit */
168 Client *client; /* responsible client, or NULL */
169 short rexmits; /* number of retransmits */
170 short packsz; /* size of packet */
171 char *packet; /* ptr to packet */
172 ZUnique_Id_t uid; /* uid of packet */
173 struct sockaddr_in ack_addr;
174 union { /* address to send to */
175 struct sockaddr_in addr; /* client address */
176 int srv_idx; /* index of server */
178 int rlm_idx; /* index of realm */
179 int rlm_srv_idx; /* index of server in realm */
182 struct _Unacked *next, **prev_p;
186 char *packet; /* the notice (in pkt form) */
187 short len; /* len of pkt */
188 unsigned int auth; /* whether it is authentic */
189 struct sockaddr_in who; /* the addr of the sender */
190 struct _Pending *next;
194 Server_state state; /* server's state */
195 struct sockaddr_in addr; /* server's address */
196 long timeout; /* Length of timeout in sec */
197 Timer *timer; /* timer for this server */
198 Pending *queue; /* queue of packets to send
199 to this server when done dumping */
200 Pending *queue_last; /* last packet on queue */
201 short num_hello_sent; /* number of hello's sent */
202 unsigned int dumping; /* 1 if dumping, so we should queue */
203 char addr_str[16]; /* text version of address */
207 NOT_SENT, /* message was not xmitted */
208 SENT, /* message was xmitted */
209 AUTH_FAILED, /* authentication failed */
210 NOT_FOUND /* user not found for uloc */
213 /* statistics gathering */
219 /* Function declarations */
221 /* found in bdump.c */
222 void bdump_get __P((ZNotice_t *notice, int auth, struct sockaddr_in *who,
224 void bdump_send __P((void));
225 void bdump_offer __P((struct sockaddr_in *who));
226 Code_t bdump_send_list_tcp __P((ZNotice_Kind_t kind, struct sockaddr_in *addr,
227 char *class_name, char *inst, char *opcode,
228 char *sender, char *recip, char **lyst,
230 int get_tgt __P((void));
232 /* found in class.c */
233 extern String *class_control, *class_admin, *class_hm;
234 extern String *class_ulogin, *class_ulocate;
235 int ZDest_eq __P((Destination *d1, Destination *d2));
236 Code_t triplet_register __P((Client *client, Destination *dest, ZRealm *realm));
237 Code_t triplet_deregister __P((Client *client, Destination *dest,
239 Code_t class_restrict __P((char *class, Acl *acl));
240 Code_t class_setup_restricted __P((char *class, Acl *acl));
241 Client **triplet_lookup __P((Destination *dest));
242 Acl *class_get_acl __P((String *class));
243 int dest_eq __P((Destination *d1, Destination *d2));
244 int order_dest_strings __P((Destination *d1, Destination *d2));
245 void triplet_dump_subs __P((FILE *fp));
247 /* found in client.c */
248 Code_t client_register __P((ZNotice_t *notice, struct in_addr *host,
249 Client **client_p, int wantdefaults));
250 void client_deregister __P((Client *client, int flush));
251 void client_flush_host __P((struct in_addr *host));
252 void client_dump_clients __P((FILE *fp));
253 Client *client_find __P((struct in_addr *host, unsigned int port));
254 Code_t client_send_clients __P((void));
256 /* found in common.c */
257 char *strsave __P((const char *str));
258 unsigned long hash __P((const char *));
259 void dump_quote __P((char *p, FILE *fp));
261 /* found in dispatch.c */
262 void handle_packet __P((void));
263 void clt_ack __P((ZNotice_t *notice, struct sockaddr_in *who, Sent_type sent));
264 void nack_release __P((Client *client));
265 void sendit __P((ZNotice_t *notice, int auth, struct sockaddr_in *who,
267 void rexmit __P((void *));
268 void xmit __P((ZNotice_t *notice, struct sockaddr_in *dest, int auth,
270 Code_t hostm_dispatch __P((ZNotice_t *notice, int auth,
271 struct sockaddr_in *who, Server *server));
272 Code_t control_dispatch __P((ZNotice_t *notice, int auth,
273 struct sockaddr_in *who, Server *server));
274 Code_t xmit_frag __P((ZNotice_t *notice, char *buf, int len, int waitforack));
275 void hostm_shutdown __P((void));
277 /* found in kstuff.c */
279 int GetKerberosData __P((int, struct in_addr, AUTH_DAT *, char *, char *));
280 Code_t SendKerberosData __P((int, KTEXT, char *, char *));
281 void sweep_ticket_hash_table __P((void *));
284 /* found in kopt.c */
287 Sched *check_key_sched_cache __P((des_cblock key));
288 void add_to_key_sched_cache __P((des_cblock key, Sched *sched));
289 /*int krb_set_key __P((void *key, int cvt));*/
290 /* int krb_rd_req __P((KTEXT authent, char *service, char *instance,
291 unsigned KRB_INT32 from_addr, AUTH_DAT *ad, char *fn)); */
292 int krb_find_ticket __P((KTEXT authent, KTEXT ticket));
293 int krb_get_lrealm __P((char *r, int n));
297 /* found in server.c */
298 void server_timo __P((void *which));
299 void server_dump_servers __P((FILE *fp));
300 void server_init __P((void));
301 void server_shutdown __P((void));
302 void server_forward __P((ZNotice_t *notice, int auth,
303 struct sockaddr_in *who));
304 void server_kill_clt __P((Client *client));
305 void server_pending_free __P((Pending *pending));
306 void server_self_queue __P((ZNotice_t *, int, struct sockaddr_in *));
307 void server_send_queue __P((Server *));
308 void server_reset __P((void));
310 Server *server_which_server __P((struct sockaddr_in *who));
311 Pending *server_dequeue __P((Server *server));
312 Code_t server_dispatch __P((ZNotice_t *notice, int auth,
313 struct sockaddr_in *who));
314 Code_t server_adispatch __P((ZNotice_t *notice, int auth,
315 struct sockaddr_in *who, Server *server));
317 /* found in subscr.c */
318 Code_t subscr_foreign_user __P((ZNotice_t *, struct sockaddr_in *, Server *, ZRealm *));
319 Code_t subscr_cancel __P((struct sockaddr_in *sin, ZNotice_t *notice));
320 Code_t subscr_subscribe __P((Client *who, ZNotice_t *notice, Server *server));
321 Code_t subscr_send_subs __P((Client *client));
322 void subscr_cancel_client __P((Client *client));
323 void subscr_sendlist __P((ZNotice_t *notice, int auth,
324 struct sockaddr_in *who));
325 void subscr_dump_subs __P((FILE *fp, Destlist *subs));
326 void subscr_reset __P((void));
327 Code_t subscr_def_subs __P((Client *who));
329 /* found in uloc.c */
330 void uloc_hflush __P((struct in_addr *addr));
331 void uloc_flush_client __P((struct sockaddr_in *sin));
332 void uloc_dump_locs __P((FILE *fp));
333 Code_t ulogin_dispatch __P((ZNotice_t *notice, int auth,
334 struct sockaddr_in *who, Server *server));
335 Code_t ulocate_dispatch __P((ZNotice_t *notice, int auth,
336 struct sockaddr_in *who, Server *server));
337 Code_t uloc_send_locations __P((void));
339 /* found in realm.c */
340 int realm_sender_in_realm __P((char *realm, char *sender));
341 int realm_bound_for_realm __P((char *realm, char *recip));
342 ZRealm *realm_which_realm __P((struct sockaddr_in *who));
343 ZRealm *realm_get_realm_by_name __P((char *name));
344 ZRealm *realm_get_realm_by_pid __P((int));
345 void realm_handoff(ZNotice_t *, int, struct sockaddr_in *, ZRealm *, int);
346 char *realm_expand_realm(char *);
347 void realm_init __P((void));
348 Code_t ZCheckZRealmAuthentication __P((ZNotice_t *, struct sockaddr_in *,
350 Code_t realm_control_dispatch __P((ZNotice_t *, int, struct sockaddr_in *,
351 Server *, ZRealm *));
352 void realm_shutdown __P((void));
353 void realm_deathgram __P((Server *));
355 /* found in version.c */
356 char *get_version __P((void));
358 /* global identifiers */
360 /* found in main.c */
361 int packets_waiting __P((void));
362 extern struct sockaddr_in srv_addr; /* server socket address */
363 extern unsigned short hm_port; /* host manager receiver port */
364 extern unsigned short hm_srv_port; /* host manager server sending port */
365 extern int srv_socket; /* dgram sockets for clients
367 extern int bdump_socket; /* brain dump socket
368 (closed most of the time) */
370 extern fd_set interesting; /* the file descrips we are listening
372 extern int nfds; /* number to look at in select() */
374 extern char myname[]; /* domain name of this host */
375 extern char list_file[];
377 extern char keytab_file[];
378 extern krb5_ccache Z_krb5_ccache;
381 extern char srvtab_file[];
382 extern char my_realm[];
384 extern char acl_dir[];
385 extern char subs_file[];
386 extern const char version[];
387 extern u_long npackets; /* num of packets processed */
388 extern time_t uptime; /* time we started */
389 extern struct in_addr my_addr;
390 extern struct timeval t_local; /* current time */
392 /* found in bdump.c */
393 extern int bdumping; /* are we processing a bdump packet? */
394 extern int bdump_concurrent; /* set while processing a packet
395 * concurrently during a braindump. */
397 /* found in dispatch.c */
398 extern Statistic i_s_ctls, i_s_logins, i_s_admins, i_s_locates;
399 extern int rexmit_times[];
401 /* found in server.c */
402 extern Server *otherservers; /* array of servers */
403 extern int me_server_idx; /* me (in the array of servers) */
404 extern int nservers; /* number of other servers*/
406 /* found in subscr.c */
407 extern String *empty;
408 extern String *wildcard_instance;
410 extern ZRealm *otherrealms;
413 extern struct in_addr my_addr; /* my inet address */
415 #define class_is_control(classname) (classname == class_control)
416 #define class_is_admin(classname) (classname == class_admin)
417 #define class_is_hm(classname) (classname == class_hm)
418 #define class_is_ulogin(classname) (classname == class_ulogin)
419 #define class_is_ulocate(classname) (classname == class_ulocate)
421 #define ADMIN_HELLO "HELLO" /* Opcode: hello, are you there */
422 #define ADMIN_IMHERE "IHEARDYOU" /* Opcode: yes, I am here */
423 #define ADMIN_SHUTDOWN "GOODBYE" /* Opcode: I am shutting down */
424 #define ADMIN_BDUMP "DUMP_AVAIL" /* Opcode: I will give you a dump */
425 #define ADMIN_DONE "DUMP_DONE" /* Opcode: brain dump for this server
427 #define ADMIN_NEWCLT "NEXT_CLIENT" /* Opcode: this is a new client */
428 #define ADMIN_KILL_CLT "KILL_CLIENT" /* Opcode: client is dead, remove */
429 #define ADMIN_STATUS "STATUS" /* Opcode: please send status */
431 #define ADMIN_NEWREALM "NEXT_REALM" /* Opcode: this is a new realm */
432 #define REALM_REQ_LOCATE "REQ_LOCATE" /* Opcode: request a location */
433 #define REALM_ANS_LOCATE "ANS_LOCATE" /* Opcode: answer to location */
434 #define REALM_BOOT "SENDSUBS" /* Opcode: first server in realm */
436 /* me_server_idx is the index into otherservers of this server descriptor. */
437 /* the 'limbo' server is always the first server */
439 #define me_server (&otherservers[me_server_idx])
440 #define limbo_server_idx() (0)
441 #define limbo_server (&otherservers[limbo_server_idx()])
443 #define msgs_queued() (ZQLength() || otherservers[me_server_idx].queue)
445 #define ack(a,b) clt_ack(a,b,SENT)
446 #define nack(a,b) clt_ack(a,b,NOT_SENT)
448 #define min(a,b) ((a) < (b) ? (a) : (b))
449 #define max(a,b) ((a) > (b) ? (a) : (b))
451 #define START_CRITICAL_CODE
452 #define END_CRITICAL_CODE
454 /* the instance that matches all instances */
455 #define WILDCARD_INSTANCE "*"
457 /* debugging macros */
459 #define zdbug(s1) if (zdebug) syslog s1;
464 #endif /* !__ZSERVER_H__ */