1 /* Core interface of secnet, to be used by all modules */
3 * This file is part of secnet.
4 * See README for full list of copyright holders.
6 * secnet is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * secnet is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * version 3 along with secnet; if not, see
18 * https://www.gnu.org/licenses/gpl.html.
24 #define ADNS_FEATURE_MANYAF
40 #include <sys/types.h>
43 #include <netinet/in.h>
44 #include <arpa/inet.h>
46 #include <bsd/sys/queue.h>
48 #define MAX_PEER_ADDRS 5
49 /* send at most this many copies; honour at most that many addresses */
51 #define MAX_NAK_MSG 80
52 #define MAX_SIG_KEYS 4
63 typedef char *string_t;
64 typedef const char *cstring_t;
66 #define False (_Bool)0
72 struct sockaddr_in sin;
74 struct sockaddr_in6 sin6;
80 #define KEYIDSZ (GRPIDSZ+ALGIDSZ)
81 /* Changing these is complex: this is the group id plus algo id */
82 /* They are costructed by pubkeys.fl.pl. Also hardcoded in _PR_ */
83 struct sigkeyid { uint8_t b[KEYIDSZ]; };
85 #define SIGKEYID_PR_FMT "%02x%02x%02x%02x%02x"
86 #define SIGKEYID_PR_VAL(id) /* SIGKEYID_PR_VAL(const sigkeyid *id) */ \
87 ((id) == (const struct sigkeyid*)0, (id)->b[0]), \
88 (id)->b[1],(id)->b[2],(id)->b[3],(id)->b[4]
89 static inline bool_t sigkeyid_equal(const struct sigkeyid *a,
90 const struct sigkeyid *b) {
91 return !memcmp(a->b, b->b, KEYIDSZ);
95 typedef uint32_t serialt;
96 static inline int serial_cmp(serialt a, serialt b) {
100 return b-a <= (serialt)0x7fffffffUL ? +1 : -1;
103 #define ASSERT(x) do { if (!(x)) { fatal("assertion failed line %d file " \
104 __FILE__,__LINE__); } } while(0)
108 extern char version[];
111 extern uint32_t message_level;
112 extern bool_t secnet_is_daemon;
113 extern struct log_if *system_log;
116 extern void start_signal_handling(void);
118 void afterfork(void);
119 /* Must be called before exec in every child made after
120 start_signal_handling. Safe to call in earlier children too. */
122 void childpersist_closefd_hook(void *fd_p, uint32_t newphase);
123 /* Convenience hook function for use with add_hook PHASE_CHILDPERSIST.
124 With `int fd' in your state struct, pass fd_p=&fd. The hook checks
125 whether fd>=0, so you can use it for an fd which is only sometimes
126 open. This function will set fd to -1, so it is idempotent. */
128 /***** CONFIGURATION support *****/
130 extern bool_t just_check_config; /* If True then we're going to exit after
131 reading the configuration file */
132 extern bool_t background; /* If True then we'll eventually run as a daemon */
134 typedef struct dict dict_t; /* Configuration dictionary */
135 typedef struct closure closure_t;
136 typedef struct item item_t;
137 typedef struct list list_t; /* A list of items */
139 /* Configuration file location, for error-reporting */
145 /* Modules export closures, which can be invoked from the configuration file.
146 "Invoking" a closure usually returns another closure (of a different
147 type), but can actually return any configuration object. */
148 typedef list_t *(apply_fn)(closure_t *self, struct cloc loc,
149 dict_t *context, list_t *data);
151 cstring_t description; /* For debugging */
152 uint32_t type; /* Central registry... */
154 void *interface; /* Interface for use inside secnet; depends on type */
157 enum types { t_null, t_bool, t_string, t_number, t_dict, t_closure };
170 /* Note that it is unwise to use this structure directly; use the list
171 manipulation functions instead. */
177 /* In the following two lookup functions, NULL means 'not found' */
178 /* Lookup a value in the specified dictionary, or its parents */
179 extern list_t *dict_lookup(dict_t *dict, cstring_t key);
180 /* Lookup a value in just the specified dictionary */
181 extern list_t *dict_lookup_primitive(dict_t *dict, cstring_t key);
182 /* Add a value to the specified dictionary */
183 extern void dict_add(dict_t *dict, cstring_t key, list_t *val);
184 /* Obtain an array of keys in the dictionary. malloced; caller frees */
185 extern cstring_t *dict_keys(dict_t *dict);
187 /* List-manipulation functions */
188 extern list_t *list_new(void);
189 extern int32_t list_length(const list_t *a);
190 extern list_t *list_append(list_t *a, item_t *i);
191 extern list_t *list_append_list(list_t *a, list_t *b);
192 /* Returns an item from the list (index starts at 0), or NULL */
193 extern item_t *list_elem(list_t *l, int32_t index);
195 /* Convenience functions */
196 extern list_t *new_closure(closure_t *cl);
197 extern void add_closure(dict_t *dict, cstring_t name, apply_fn apply);
198 extern void *find_cl_if(dict_t *dict, cstring_t name, uint32_t type,
199 bool_t fail_if_invalid, cstring_t desc,
201 extern item_t *dict_find_item(dict_t *dict, cstring_t key, bool_t required,
202 cstring_t desc, struct cloc loc);
203 extern string_t dict_read_string(dict_t *dict, cstring_t key, bool_t required,
204 cstring_t desc, struct cloc loc);
205 extern uint32_t dict_read_number(dict_t *dict, cstring_t key, bool_t required,
206 cstring_t desc, struct cloc loc,
208 /* return value can safely be assigned to int32_t */
209 extern bool_t dict_read_bool(dict_t *dict, cstring_t key, bool_t required,
210 cstring_t desc, struct cloc loc, bool_t def);
211 extern dict_t *dict_read_dict(dict_t *dict, cstring_t key, bool_t required,
212 cstring_t desc, struct cloc loc);
213 const char **dict_read_string_array(dict_t *dict, cstring_t key,
214 bool_t required, cstring_t desc,
215 struct cloc loc, const char *const *def);
216 /* Return value is a NULL-terminated array obtained from malloc;
217 * Individual string values are still owned by config file machinery
218 * and must not be modified or freed. Returns NULL if key not
225 extern uint32_t string_to_word(cstring_t s, struct cloc loc,
226 struct flagstr *f, cstring_t desc);
227 extern uint32_t string_list_to_word(list_t *l, struct flagstr *f,
230 /***** END of configuration support *****/
232 /***** UTILITY functions *****/
234 extern char *safe_strdup(const char *string, const char *message);
235 extern void *safe_malloc(size_t size, const char *message);
236 extern void *safe_malloc_ary(size_t size, size_t count, const char *message);
237 extern void *safe_realloc_ary(void *p, size_t size, size_t count,
238 const char *message);
241 ((p)=safe_malloc(sizeof(*(p)), \
243 #define NEW_ARY(p,count) \
244 ((p)=safe_malloc_ary(sizeof(*(p)),(count), \
245 __FILE__ ":" #p "[" #count "]"))
246 #define REALLOC_ARY(p,count) \
247 ((p)=safe_realloc_ary((p),sizeof(*(p)),(count), \
248 __FILE__ ":" #p "[" #count "]"))
250 void setcloexec(int fd); /* cannot fail */
251 void setnonblock(int fd); /* cannot fail */
252 void pipe_cloexec(int fd[2]); /* pipe(), setcloexec() twice; cannot fail */
254 extern int sys_cmd(const char *file, const char *argc, ...);
256 extern uint64_t now_global;
257 extern struct timeval tv_now_global;
259 static const uint64_t *const now = &now_global;
260 static const struct timeval *const tv_now = &tv_now_global;
262 /* "now" is current program time, in milliseconds. It is derived
263 from tv_now. Both are provided by the event loop. */
265 /***** END of utility functions *****/
267 /***** START of max_start_pad handling *****/
269 extern int32_t site_max_start_pad, transform_max_start_pad,
272 void update_max_start_pad(int32_t *our_module_global, int32_t our_instance);
273 int32_t calculate_max_start_pad(void);
275 /***** END of max_start_pad handling *****/
277 /***** SCHEDULING support */
279 /* If nfds_io is insufficient for your needs, set it to the required
280 number and return ERANGE. timeout is in milliseconds; if it is too
281 high then lower it. It starts at -1 (==infinite). */
282 /* Note that beforepoll_fn may NOT do anything which might change the
283 fds or timeouts wanted by other registered poll loop loopers.
284 Callers should make sure of this by not making any calls into other
285 modules from the beforepoll_fn; the easiest way to ensure this is
286 for beforepoll_fn to only retreive information and not take any
289 typedef int beforepoll_fn(void *st, struct pollfd *fds, int *nfds_io,
291 typedef void afterpoll_fn(void *st, struct pollfd *fds, int nfds);
292 /* If beforepoll_fn returned ERANGE, afterpoll_fn gets nfds==0.
293 afterpoll_fn never gets !!(fds[].revents & POLLNVAL) - such
294 a report is detected as a fatal error by the event loop. */
296 /* void BEFOREPOLL_WANT_FDS(int want);
297 * Expects: int *nfds_io;
298 * Can perform non-local exit.
299 * Checks whether there is space for want fds. If so, sets *nfds_io.
300 * If not, sets *nfds_io and returns. */
301 #define BEFOREPOLL_WANT_FDS(want) do{ \
302 if (*nfds_io<(want)) { *nfds_io=(want); return ERANGE; } \
306 /* Register interest in the main loop of the program. Before a call
307 to poll() your supplied beforepoll function will be called. After
308 the call to poll() the supplied afterpoll function will be called. */
309 struct poll_interest *register_for_poll(void *st, beforepoll_fn *before,
310 afterpoll_fn *after, cstring_t desc);
311 void deregister_for_poll(struct poll_interest *i);
313 /***** END of scheduling support */
315 /***** PROGRAM LIFETIME support */
317 /* The secnet program goes through a number of phases in its lifetime.
318 Module code may arrange to be called just as various phases are
321 Remember to update the table in util.c if changing the set of
326 PHASE_GETOPTS, /* Process command-line arguments */
327 PHASE_READCONFIG, /* Parse and process configuration file */
328 PHASE_SETUP, /* Process information in configuration */
329 PHASE_DAEMONIZE, /* Become a daemon (if necessary) */
330 PHASE_GETRESOURCES, /* Obtain all external resources */
331 PHASE_DROPPRIV, /* Last chance for privileged operations */
333 PHASE_SHUTDOWN, /* About to die; delete key material, etc. */
334 PHASE_CHILDPERSIST, /* Forked long-term child: close fds, etc. */
335 /* Keep this last: */
339 /* Each module should, in its CHILDPERSIST hooks, close all fds which
340 constitute ownership of important operating system resources, or
341 which are used for IPC with other processes who want to get the
342 usual disconnection effects if the main secnet process dies.
343 CHILDPERSIST hooks are not run if the child is going to exec;
344 so fds such as described above should be CLOEXEC too. */
346 typedef void hook_fn(void *self, uint32_t newphase);
347 bool_t add_hook(uint32_t phase, hook_fn *f, void *state);
348 bool_t remove_hook(uint32_t phase, hook_fn *f, void *state);
350 extern uint32_t current_phase;
351 extern void enter_phase(uint32_t new_phase);
353 void phase_hooks_init(void); /* for main() only */
354 void clear_phase_hooks(uint32_t phase); /* for afterfork() */
356 /* Some features (like netlink 'soft' routes) require that secnet
357 retain root privileges. They should indicate that here when
359 extern bool_t require_root_privileges;
360 extern cstring_t require_root_privileges_explanation;
362 /* Some modules may want to know whether secnet is going to drop
363 privilege, so that they know whether to do privsep. Call only
364 in phases SETUP and later. */
365 bool_t will_droppriv(void);
367 /***** END of program lifetime support *****/
369 /***** MODULE support *****/
371 /* Module initialisation function type - modules export one function of
372 this type which is called to initialise them. For dynamically loaded
373 modules it's called "secnet_module". */
374 typedef void init_module(dict_t *dict);
376 extern void init_builtin_modules(dict_t *dict);
378 extern init_module resolver_module;
379 extern init_module random_module;
380 extern init_module udp_module;
381 extern init_module polypath_module;
382 extern init_module util_module;
383 extern init_module site_module;
384 extern init_module transform_eax_module;
385 extern init_module transform_cbcmac_module;
386 extern init_module netlink_module;
387 extern init_module rsa_module;
388 extern init_module dh_module;
389 extern init_module md5_module;
390 extern init_module slip_module;
391 extern init_module tun_module;
392 extern init_module sha1_module;
393 extern init_module log_module;
394 extern init_module privcache_module;
396 /***** END of module support *****/
398 /***** SIGNATURE SCHEMES *****/
400 struct sigscheme_info;
402 typedef bool_t sigscheme_loadpub(const struct sigscheme_info *algo,
403 struct buffer_if *pubkeydata,
404 struct sigpubkey_if **sigpub_r,
406 /* pubkeydata is (supposedly) for this algorithm.
407 * loadpub should log an error if it fails.
408 * pubkeydata may be modified (but not freed) */
410 typedef bool_t sigscheme_loadpriv(const struct sigscheme_info *algo,
411 struct buffer_if *privkeydata,
412 struct sigprivkey_if **sigpriv_r,
414 /* privkeydata may contain data for any algorithm, not necessarily
415 * this one! If it is not for this algorithm, return False and do
416 * not log anything (other than at M_DEBUG). If it *is* for this
417 * algorithm but is wrong, log at M_ERROR.
418 * On entry privkeydata->base==start. loadpriv may modify base and
419 * size, but not anything else. So it may use unprepend and
422 struct sigscheme_info {
425 sigscheme_loadpub *loadpub;
426 sigscheme_loadpriv *loadpriv;
429 extern const struct sigscheme_info rsa1_sigscheme;
430 extern const struct sigscheme_info sigschemes[]; /* sentinel has name==0 */
432 /***** END of signature schemes *****/
434 /***** CLOSURE TYPES and interface definitions *****/
437 #define CL_RESOLVER 1
438 #define CL_RANDOMSRC 2
439 #define CL_SIGPUBKEY 3
440 #define CL_SIGPRIVKEY 4
445 #define CL_TRANSFORM 9
449 #define CL_NETLINK 14
450 #define CL_PRIVCACHE 15
454 struct alg_msg_data {
459 /* PURE closure requires no interface */
461 /* RESOLVER interface */
463 /* Answers to queries are delivered to a function of this
464 type. 'address' will be NULL if there was a problem with the query. It
465 will be freed once resolve_answer_fn returns. naddrs is the actual
466 size of the array at addrs; was_naddrs is the number of addresses
467 actually found in the DNS, which may be bigger if addrs is equal
468 to MAX_PEER_ADDRS (ie there were too many). */
469 typedef void resolve_answer_fn(void *st, const struct comm_addr *addrs,
470 int naddrs, int was_naddrs,
471 const char *name, const char *failwhy);
472 /* name is the same ptr as passed to request, so its lifetime must
474 typedef bool_t resolve_request_fn(void *st, cstring_t name,
475 int remoteport, struct comm_if *comm,
476 resolve_answer_fn *cb, void *cst);
479 resolve_request_fn *request;
482 /* RANDOMSRC interface */
484 /* Return some random data. Cannot fail. */
485 typedef void random_fn(void *st, int32_t bytes, uint8_t *buff);
493 /* SIGPUBKEY interface */
495 typedef void sig_sethash_fn(void *st, struct hash_if *hash);
496 typedef void sig_dispose_fn(void *st);
498 typedef bool_t sig_unpick_fn(void *sst, struct buffer_if *msg,
499 struct alg_msg_data *sig);
500 typedef bool_t sig_checksig_fn(void *st, uint8_t *data, int32_t datalen,
501 const struct alg_msg_data *sig);
502 struct sigpubkey_if {
504 sig_sethash_fn *sethash; /* must be called before use, if non-0 */
505 sig_unpick_fn *unpick;
506 sig_checksig_fn *check;
507 const struct hash_if *hash;
508 sig_dispose_fn *dispose;
511 /* SIGPRIVKEY interface */
513 /* Appends the signature to msg.
514 * Can fail and returnn False, eg if the buffer is too small. */
515 typedef bool_t sig_makesig_fn(void *st, uint8_t *data, int32_t datalen,
516 struct buffer_if *msg);
517 struct sigprivkey_if {
519 sig_sethash_fn *sethash; /* must be called before use, if non-0 */
520 sig_makesig_fn *sign;
521 const struct hash_if *hash;
522 sig_dispose_fn *dispose;
525 /* PRIVCACHE interface */
527 typedef struct sigprivkey_if *privcache_lookup_fn(void *st,
528 const struct sigkeyid *id,
530 /* Return is valid only until you return from the current event!
531 * You do not need to call ->sethash. */
533 struct privcache_if {
535 privcache_lookup_fn *lookup;
541 /* This struct is pure data; in particular comm's clients may
543 struct comm_if *comm;
545 int ix; /* see comment `Re comm_addr.ix' in udp.c */
548 struct comm_clientinfo; /* private for comm */
550 typedef struct comm_clientinfo *comm_clientinfo_fn(void *state, dict_t*,
552 /* A comm client may call this during configuration, and then pass
553 * the resulting comm_clientinfo* to some or all sendmsg calls.
554 * The semantics depend on the dict and defined by the comm, and
555 * should be documented in README. */
558 comm_notify_whynot_general,
559 comm_notify_whynot_unpick,
560 comm_notify_whynot_name_local,
561 comm_notify_whynot_name_remote,
564 /* Return True if the packet was processed, and shouldn't be passed to
565 any other potential receivers. (buf is freed iff True returned.) */
566 typedef bool_t comm_notify_fn(void *state, struct buffer_if *buf,
567 const struct comm_addr *source,
568 struct priomsg *whynot);
569 typedef void comm_request_notify_fn(void *commst, void *nst,
571 typedef void comm_release_notify_fn(void *commst, void *nst,
573 typedef bool_t comm_sendmsg_fn(void *commst, struct buffer_if *buf,
574 const struct comm_addr *dest,
575 struct comm_clientinfo* /* 0 OK */);
576 /* Only returns false if (we know that) the local network
577 * environment is such that this address cannot work; transient
578 * or unknown/unexpected failures return true. */
579 typedef const char *comm_addr_to_string_fn(void *commst,
580 const struct comm_addr *ca);
581 /* Returned string is in a static buffer. */
584 comm_clientinfo_fn *clientinfo;
585 comm_request_notify_fn *request_notify;
586 comm_release_notify_fn *release_notify;
587 comm_sendmsg_fn *sendmsg;
588 comm_addr_to_string_fn *addr_to_string;
591 bool_t iaddr_equal(const union iaddr *ia, const union iaddr *ib,
594 static inline const char *comm_addr_to_string(const struct comm_addr *ca)
596 return ca->comm->addr_to_string(ca->comm->st, ca);
599 static inline bool_t comm_addr_equal(const struct comm_addr *a,
600 const struct comm_addr *b)
602 return a->comm==b->comm && iaddr_equal(&a->ia,&b->ia,False);
607 #define LOG_MESSAGE_BUFLEN 1023
609 typedef void log_msg_fn(void *st, int class, const char *message, ...);
610 typedef void log_vmsg_fn(void *st, int class, const char *message,
614 log_vmsg_fn *vlogfn; /* printf format checking. Use [v]slilog instead */
615 char buff[LOG_MESSAGE_BUFLEN+1];
617 /* (convenience functions, defined in util.c) */
618 extern void slilog(struct log_if *lf, int class, const char *message, ...)
620 extern void vslilog(struct log_if *lf, int class, const char *message, va_list)
623 /* Versions which take (parts of) (multiple) messages, using \n to
624 * distinguish one message from another. */
625 extern void slilog_part(struct log_if *lf, int class, const char *message, ...)
627 extern void vslilog_part(struct log_if *lf, int class, const char *message,
628 va_list) FORMAT(printf,3,0);
632 /* Pretty much a placeholder; allows starting and stopping of processing,
634 typedef void site_control_fn(void *st, bool_t run);
635 typedef uint32_t site_status_fn(void *st);
638 site_control_fn *control;
639 site_status_fn *status;
642 /* TRANSFORM interface */
644 /* A reversable transformation. Transforms buffer in-place; may add
645 data to start or end. (Reverse transformations decrease
646 length, of course.) Transformations may be key-dependent, in which
647 case key material is passed in at initialisation time. They may
648 also depend on internal factors (eg. time) and keep internal
649 state. A struct transform_if only represents a particular type of
650 transformation; instances of the transformation (eg. with
651 particular key material) have a different C type. The same
652 secret key will be used in opposite directions between a pair of
653 secnets; one of these pairs will get direction==False, the other True. */
655 typedef struct transform_inst_if *transform_createinstance_fn(void *st);
656 typedef bool_t transform_setkey_fn(void *st, uint8_t *key, int32_t keylen,
658 typedef bool_t transform_valid_fn(void *st); /* 0: no key; 1: ok */
659 typedef void transform_delkey_fn(void *st);
660 typedef void transform_destroyinstance_fn(void *st);
663 transform_apply_ok = 0, /* all is well (everyone may assume==0) */
664 transform_apply_err = 1, /* any other problem */
665 transform_apply_seqrange = 2,
666 /* message decrypted but sequence number was out of recent range */
667 transform_apply_seqdupe = 3,
668 /* message decrypted but was dupe of recent packet */
669 } transform_apply_return;
672 transform_apply_return_badseq(transform_apply_return problem) {
673 return problem == transform_apply_seqrange ||
674 problem == transform_apply_seqdupe;
677 typedef transform_apply_return transform_apply_fn(void *st,
678 struct buffer_if *buf, const char **errmsg);
680 struct transform_inst_if {
682 transform_setkey_fn *setkey;
683 transform_valid_fn *valid;
684 transform_delkey_fn *delkey;
685 transform_apply_fn *forwards;
686 transform_apply_fn *reverse;
687 transform_destroyinstance_fn *destroy;
690 struct transform_if {
693 int32_t keylen; /* <<< INT_MAX */
694 transform_createinstance_fn *create;
697 /* NETLINK interface */
699 /* Used by netlink to deliver to site, and by site to deliver to
700 netlink. cid is the client identifier returned by
701 netlink_regnets_fn. If buf has size 0 then the function is just
702 being called for its site-effects (eg. making the site code attempt
703 to bring up a network link) */
704 typedef void netlink_deliver_fn(void *st, struct buffer_if *buf);
705 /* site code can tell netlink when outgoing packets will be dropped,
706 so netlink can generate appropriate ICMP and make routing decisions */
707 #define LINK_QUALITY_UNUSED 0 /* This link is unused, do not make this netlink */
708 #define LINK_QUALITY_DOWN 1 /* No chance of a packet being delivered right away*/
709 #define LINK_QUALITY_DOWN_STALE_ADDRESS 2 /* Link down, old address information */
710 #define LINK_QUALITY_DOWN_CURRENT_ADDRESS 3 /* Link down, current address information */
711 #define LINK_QUALITY_UP 4 /* Link active */
712 #define MAXIMUM_LINK_QUALITY 3
713 typedef void netlink_link_quality_fn(void *st, uint32_t quality);
714 typedef void netlink_register_fn(void *st, netlink_deliver_fn *deliver,
715 void *dst, uint32_t *localmtu_r /* NULL ok */);
716 typedef void netlink_output_config_fn(void *st, struct buffer_if *buf);
717 typedef bool_t netlink_check_config_fn(void *st, struct buffer_if *buf);
718 typedef void netlink_set_mtu_fn(void *st, int32_t new_mtu);
721 netlink_register_fn *reg;
722 netlink_deliver_fn *deliver;
723 netlink_link_quality_fn *set_quality;
724 netlink_set_mtu_fn *set_mtu;
729 /* Returns public key as a malloced hex string */
730 typedef string_t dh_makepublic_fn(void *st, uint8_t *secret,
732 /* Fills buffer (up to buflen) with shared secret */
733 typedef void dh_makeshared_fn(void *st, uint8_t *secret,
734 int32_t secretlen, cstring_t rempublic,
735 uint8_t *sharedsecret, int32_t buflen);
738 int32_t len; /* Approximate size of modulus in bytes */
739 int32_t ceil_len; /* Number of bytes just sufficient to contain modulus */
740 dh_makepublic_fn *makepublic;
741 dh_makeshared_fn *makeshared;
746 typedef void hash_init_fn(void *st /* slen bytes alloc'd by caller */);
747 typedef void hash_update_fn(void *st, const void *buf, int32_t len);
748 typedef void hash_final_fn(void *st, uint8_t *digest /* hlen bytes */);
750 int32_t slen; /* State length in bytes */
751 int32_t hlen; /* Hash output length in bytes */
753 hash_update_fn *update;
754 hash_final_fn *final;
757 /* BUFFER interface */
761 cstring_t owner; /* Set to constant string */
762 struct cloc loc; /* Where we were defined */
765 int32_t size; /* Size of buffer contents */
766 int32_t alloclen; /* Total length allocated at base */
769 /***** LOG functions *****/
771 #define M_DEBUG_CONFIG 0x001
772 #define M_DEBUG_PHASE 0x002
773 #define M_DEBUG 0x004
775 #define M_NOTICE 0x010
776 #define M_WARNING 0x020
778 #define M_SECURITY 0x080
779 #define M_FATAL 0x100
781 /* The fatal() family of functions require messages that do not end in '\n' */
782 extern NORETURN(fatal(const char *message, ...)) FORMAT(printf,1,2);
783 extern NORETURN(fatal_perror(const char *message, ...)) FORMAT(printf,1,2);
784 extern NORETURN(fatal_status(int status, const char *message, ...))
786 extern NORETURN(fatal_perror_status(int status, const char *message, ...))
789 /* Convenient nonfatal logging. Requires message that does not end in '\n'.
790 * If class contains M_FATAL, exits (after entering PHASE_SHUTDOWN).
791 * lg, errnoval and loc may sensibly be 0. desc must NOT be 0.
792 * lg_[v]perror save and restore errno. */
793 void lg_vperror(struct log_if *lg, const char *desc, struct cloc *loc,
794 int class, int errnoval, const char *fmt, va_list al)
796 void lg_perror(struct log_if *lg, const char *desc, struct cloc *loc,
797 int class, int errnoval, const char *fmt, ...)
799 void lg_exitstatus(struct log_if *lg, const char *desc, struct cloc *loc,
800 int class, int status, const char *progname);
802 /* The cfgfatal() family of functions require messages that end in '\n' */
803 extern NORETURN(cfgfatal(struct cloc loc, cstring_t facility,
804 const char *message, ...)) FORMAT(printf,3,4);
805 extern void cfgfile_postreadcheck(struct cloc loc, FILE *f);
806 extern NORETURN(vcfgfatal_maybefile(FILE *maybe_f, struct cloc loc,
807 cstring_t facility, const char *message,
810 extern NORETURN(cfgfatal_maybefile(FILE *maybe_f, struct cloc loc,
812 const char *message, ...))
815 extern void Message(uint32_t class, const char *message, ...)
817 extern void log_from_fd(int fd, cstring_t prefix, struct log_if *log);
819 /***** END of log functions *****/
821 #define STRING2(x) #x
822 #define STRING(x) STRING2(x)
824 #define FILLZERO(obj) (memset(&(obj),0,sizeof((obj))))
825 #define ARRAY_SIZE(ary) (sizeof((ary))/sizeof((ary)[0]))
828 * void COPY_OBJ( OBJECT& dst, const OBJECT& src);
829 * void COPY_ARRAY(OBJECT *dst, const OBJECT *src, INTEGER count);
830 * // Typesafe: we check that the type OBJECT is the same in both cases.
831 * // It is OK to use COPY_OBJ on an array object, provided dst is
832 * // _actually_ the whole array object and not decayed into a
833 * // pointer (e.g. a formal parameter).
835 #define COPY_OBJ(dst,src) \
836 (&(dst)==&(src), memcpy(&(dst),&(src),sizeof((dst))))
837 #define COPY_ARRAY(dst,src,count) \
838 (&(dst)[0]==&(src)[0], memcpy((dst),(src),sizeof((dst)[0])*(count)))
840 #endif /* secnet_h */