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
38 #include <sys/types.h>
41 #include <netinet/in.h>
42 #include <arpa/inet.h>
44 #include <bsd/sys/queue.h>
46 #define MAX_PEER_ADDRS 5
47 /* send at most this many copies; honour at most that many addresses */
49 #define MAX_NAK_MSG 80
56 typedef char *string_t;
57 typedef const char *cstring_t;
59 #define False (_Bool)0
65 struct sockaddr_in sin;
67 struct sockaddr_in6 sin6;
71 #define ASSERT(x) do { if (!(x)) { fatal("assertion failed line %d file " \
72 __FILE__,__LINE__); } } while(0)
76 extern char version[];
79 extern uint32_t message_level;
80 extern bool_t secnet_is_daemon;
81 extern struct log_if *system_log;
84 extern void start_signal_handling(void);
87 /* Must be called before exec in every child made after
88 start_signal_handling. Safe to call in earlier children too. */
90 void childpersist_closefd_hook(void *fd_p, uint32_t newphase);
91 /* Convenience hook function for use with add_hook PHASE_CHILDPERSIST.
92 With `int fd' in your state struct, pass fd_p=&fd. The hook checks
93 whether fd>=0, so you can use it for an fd which is only sometimes
94 open. This function will set fd to -1, so it is idempotent. */
96 /***** CONFIGURATION support *****/
98 extern bool_t just_check_config; /* If True then we're going to exit after
99 reading the configuration file */
100 extern bool_t background; /* If True then we'll eventually run as a daemon */
102 typedef struct dict dict_t; /* Configuration dictionary */
103 typedef struct closure closure_t;
104 typedef struct item item_t;
105 typedef struct list list_t; /* A list of items */
107 /* Configuration file location, for error-reporting */
113 /* Modules export closures, which can be invoked from the configuration file.
114 "Invoking" a closure usually returns another closure (of a different
115 type), but can actually return any configuration object. */
116 typedef list_t *(apply_fn)(closure_t *self, struct cloc loc,
117 dict_t *context, list_t *data);
119 cstring_t description; /* For debugging */
120 uint32_t type; /* Central registry... */
122 void *interface; /* Interface for use inside secnet; depends on type */
125 enum types { t_null, t_bool, t_string, t_number, t_dict, t_closure };
138 /* Note that it is unwise to use this structure directly; use the list
139 manipulation functions instead. */
145 /* In the following two lookup functions, NULL means 'not found' */
146 /* Lookup a value in the specified dictionary, or its parents */
147 extern list_t *dict_lookup(dict_t *dict, cstring_t key);
148 /* Lookup a value in just the specified dictionary */
149 extern list_t *dict_lookup_primitive(dict_t *dict, cstring_t key);
150 /* Add a value to the specified dictionary */
151 extern void dict_add(dict_t *dict, cstring_t key, list_t *val);
152 /* Obtain an array of keys in the dictionary. malloced; caller frees */
153 extern cstring_t *dict_keys(dict_t *dict);
155 /* List-manipulation functions */
156 extern list_t *list_new(void);
157 extern int32_t list_length(const list_t *a);
158 extern list_t *list_append(list_t *a, item_t *i);
159 extern list_t *list_append_list(list_t *a, list_t *b);
160 /* Returns an item from the list (index starts at 0), or NULL */
161 extern item_t *list_elem(list_t *l, int32_t index);
163 /* Convenience functions */
164 extern list_t *new_closure(closure_t *cl);
165 extern void add_closure(dict_t *dict, cstring_t name, apply_fn apply);
166 extern void *find_cl_if(dict_t *dict, cstring_t name, uint32_t type,
167 bool_t fail_if_invalid, cstring_t desc,
169 extern item_t *dict_find_item(dict_t *dict, cstring_t key, bool_t required,
170 cstring_t desc, struct cloc loc);
171 extern string_t dict_read_string(dict_t *dict, cstring_t key, bool_t required,
172 cstring_t desc, struct cloc loc);
173 extern uint32_t dict_read_number(dict_t *dict, cstring_t key, bool_t required,
174 cstring_t desc, struct cloc loc,
176 /* return value can safely be assigned to int32_t */
177 extern bool_t dict_read_bool(dict_t *dict, cstring_t key, bool_t required,
178 cstring_t desc, struct cloc loc, bool_t def);
179 extern dict_t *dict_read_dict(dict_t *dict, cstring_t key, bool_t required,
180 cstring_t desc, struct cloc loc);
181 const char **dict_read_string_array(dict_t *dict, cstring_t key,
182 bool_t required, cstring_t desc,
183 struct cloc loc, const char *const *def);
184 /* Return value is a NULL-terminated array obtained from malloc;
185 * Individual string values are still owned by config file machinery
186 * and must not be modified or freed. Returns NULL if key not
193 extern uint32_t string_to_word(cstring_t s, struct cloc loc,
194 struct flagstr *f, cstring_t desc);
195 extern uint32_t string_list_to_word(list_t *l, struct flagstr *f,
198 /***** END of configuration support *****/
200 /***** UTILITY functions *****/
202 extern char *safe_strdup(const char *string, const char *message);
203 extern void *safe_malloc(size_t size, const char *message);
204 extern void *safe_malloc_ary(size_t size, size_t count, const char *message);
205 extern void *safe_realloc_ary(void *p, size_t size, size_t count,
206 const char *message);
209 ((p)=safe_malloc(sizeof(*(p)), \
211 #define NEW_ARY(p,count) \
212 ((p)=safe_malloc_ary(sizeof(*(p)),(count), \
213 __FILE__ ":" #p "[" #count "]"))
214 #define REALLOC_ARY(p,count) \
215 ((p)=safe_realloc_ary((p),sizeof(*(p)),(count), \
216 __FILE__ ":" #p "[" #count "]"))
218 void setcloexec(int fd); /* cannot fail */
219 void setnonblock(int fd); /* cannot fail */
220 void pipe_cloexec(int fd[2]); /* pipe(), setcloexec() twice; cannot fail */
222 extern int sys_cmd(const char *file, const char *argc, ...);
224 extern uint64_t now_global;
225 extern struct timeval tv_now_global;
227 static const uint64_t *const now = &now_global;
228 static const struct timeval *const tv_now = &tv_now_global;
230 /* "now" is current program time, in milliseconds. It is derived
231 from tv_now. Both are provided by the event loop. */
233 /***** END of utility functions *****/
235 /***** START of max_start_pad handling *****/
237 extern int32_t site_max_start_pad, transform_max_start_pad,
240 void update_max_start_pad(int32_t *our_module_global, int32_t our_instance);
241 int32_t calculate_max_start_pad(void);
243 /***** END of max_start_pad handling *****/
245 /***** SCHEDULING support */
247 /* If nfds_io is insufficient for your needs, set it to the required
248 number and return ERANGE. timeout is in milliseconds; if it is too
249 high then lower it. It starts at -1 (==infinite). */
250 /* Note that beforepoll_fn may NOT do anything which might change the
251 fds or timeouts wanted by other registered poll loop loopers.
252 Callers should make sure of this by not making any calls into other
253 modules from the beforepoll_fn; the easiest way to ensure this is
254 for beforepoll_fn to only retreive information and not take any
257 typedef int beforepoll_fn(void *st, struct pollfd *fds, int *nfds_io,
259 typedef void afterpoll_fn(void *st, struct pollfd *fds, int nfds);
260 /* If beforepoll_fn returned ERANGE, afterpoll_fn gets nfds==0.
261 afterpoll_fn never gets !!(fds[].revents & POLLNVAL) - such
262 a report is detected as a fatal error by the event loop. */
264 /* void BEFOREPOLL_WANT_FDS(int want);
265 * Expects: int *nfds_io;
266 * Can perform non-local exit.
267 * Checks whether there is space for want fds. If so, sets *nfds_io.
268 * If not, sets *nfds_io and returns. */
269 #define BEFOREPOLL_WANT_FDS(want) do{ \
270 if (*nfds_io<(want)) { *nfds_io=(want); return ERANGE; } \
274 /* Register interest in the main loop of the program. Before a call
275 to poll() your supplied beforepoll function will be called. After
276 the call to poll() the supplied afterpoll function will be called. */
277 struct poll_interest *register_for_poll(void *st, beforepoll_fn *before,
278 afterpoll_fn *after, cstring_t desc);
279 void deregister_for_poll(struct poll_interest *i);
281 /***** END of scheduling support */
283 /***** PROGRAM LIFETIME support */
285 /* The secnet program goes through a number of phases in its lifetime.
286 Module code may arrange to be called just as various phases are
289 Remember to update the table in util.c if changing the set of
294 PHASE_GETOPTS, /* Process command-line arguments */
295 PHASE_READCONFIG, /* Parse and process configuration file */
296 PHASE_SETUP, /* Process information in configuration */
297 PHASE_DAEMONIZE, /* Become a daemon (if necessary) */
298 PHASE_GETRESOURCES, /* Obtain all external resources */
299 PHASE_DROPPRIV, /* Last chance for privileged operations */
301 PHASE_SHUTDOWN, /* About to die; delete key material, etc. */
302 PHASE_CHILDPERSIST, /* Forked long-term child: close fds, etc. */
303 /* Keep this last: */
307 /* Each module should, in its CHILDPERSIST hooks, close all fds which
308 constitute ownership of important operating system resources, or
309 which are used for IPC with other processes who want to get the
310 usual disconnection effects if the main secnet process dies.
311 CHILDPERSIST hooks are not run if the child is going to exec;
312 so fds such as described above should be CLOEXEC too. */
314 typedef void hook_fn(void *self, uint32_t newphase);
315 bool_t add_hook(uint32_t phase, hook_fn *f, void *state);
316 bool_t remove_hook(uint32_t phase, hook_fn *f, void *state);
318 extern uint32_t current_phase;
319 extern void enter_phase(uint32_t new_phase);
321 void phase_hooks_init(void); /* for main() only */
322 void clear_phase_hooks(uint32_t phase); /* for afterfork() */
324 /* Some features (like netlink 'soft' routes) require that secnet
325 retain root privileges. They should indicate that here when
327 extern bool_t require_root_privileges;
328 extern cstring_t require_root_privileges_explanation;
330 /* Some modules may want to know whether secnet is going to drop
331 privilege, so that they know whether to do privsep. Call only
332 in phases SETUP and later. */
333 bool_t will_droppriv(void);
335 /***** END of program lifetime support *****/
337 /***** MODULE support *****/
339 /* Module initialisation function type - modules export one function of
340 this type which is called to initialise them. For dynamically loaded
341 modules it's called "secnet_module". */
342 typedef void init_module(dict_t *dict);
344 extern void init_builtin_modules(dict_t *dict);
346 extern init_module resolver_module;
347 extern init_module random_module;
348 extern init_module udp_module;
349 extern init_module polypath_module;
350 extern init_module util_module;
351 extern init_module site_module;
352 extern init_module transform_eax_module;
353 extern init_module transform_cbcmac_module;
354 extern init_module netlink_module;
355 extern init_module rsa_module;
356 extern init_module dh_module;
357 extern init_module md5_module;
358 extern init_module slip_module;
359 extern init_module tun_module;
360 extern init_module sha1_module;
361 extern init_module log_module;
363 /***** END of module support *****/
365 /***** CLOSURE TYPES and interface definitions *****/
368 #define CL_RESOLVER 1
369 #define CL_RANDOMSRC 2
370 #define CL_SIGPUBKEY 3
371 #define CL_SIGPRIVKEY 4
376 #define CL_TRANSFORM 9
380 #define CL_NETLINK 14
384 struct alg_msg_data {
389 /* PURE closure requires no interface */
391 /* RESOLVER interface */
393 /* Answers to queries are delivered to a function of this
394 type. 'address' will be NULL if there was a problem with the query. It
395 will be freed once resolve_answer_fn returns. naddrs is the actual
396 size of the array at addrs; was_naddrs is the number of addresses
397 actually found in the DNS, which may be bigger if addrs is equal
398 to MAX_PEER_ADDRS (ie there were too many). */
399 typedef void resolve_answer_fn(void *st, const struct comm_addr *addrs,
400 int naddrs, int was_naddrs,
401 const char *name, const char *failwhy);
402 /* name is the same ptr as passed to request, so its lifetime must
404 typedef bool_t resolve_request_fn(void *st, cstring_t name,
405 int remoteport, struct comm_if *comm,
406 resolve_answer_fn *cb, void *cst);
409 resolve_request_fn *request;
412 /* RANDOMSRC interface */
414 /* Return some random data. Cannot fail. */
415 typedef void random_fn(void *st, int32_t bytes, uint8_t *buff);
423 /* SIGPUBKEY interface */
425 typedef void sig_sethash_fn(void *st, struct hash_if *hash);
426 typedef bool_t sig_unpick_fn(void *sst, struct buffer_if *msg,
427 struct alg_msg_data *sig);
428 typedef bool_t sig_checksig_fn(void *st, uint8_t *data, int32_t datalen,
429 const struct alg_msg_data *sig);
430 struct sigpubkey_if {
432 sig_sethash_fn *sethash; /* must be called before check, if non-0 */
433 sig_unpick_fn *unpick;
434 sig_checksig_fn *check;
437 /* SIGPRIVKEY interface */
439 /* Appends the signature to msg.
440 * Can fail and returnn False, eg if the buffer is too small. */
441 typedef bool_t sig_makesig_fn(void *st, uint8_t *data, int32_t datalen,
442 struct buffer_if *msg);
443 struct sigprivkey_if {
445 sig_sethash_fn *sethash; /* must be called before sign, if non-0 */
446 sig_makesig_fn *sign;
452 /* This struct is pure data; in particular comm's clients may
454 struct comm_if *comm;
456 int ix; /* see comment `Re comm_addr.ix' in udp.c */
459 struct comm_clientinfo; /* private for comm */
461 typedef struct comm_clientinfo *comm_clientinfo_fn(void *state, dict_t*,
463 /* A comm client may call this during configuration, and then pass
464 * the resulting comm_clientinfo* to some or all sendmsg calls.
465 * The semantics depend on the dict and defined by the comm, and
466 * should be documented in README. */
469 comm_notify_whynot_general,
470 comm_notify_whynot_unpick,
471 comm_notify_whynot_name_local,
472 comm_notify_whynot_name_remote,
475 /* Return True if the packet was processed, and shouldn't be passed to
476 any other potential receivers. (buf is freed iff True returned.) */
477 typedef bool_t comm_notify_fn(void *state, struct buffer_if *buf,
478 const struct comm_addr *source,
479 struct priomsg *whynot);
480 typedef void comm_request_notify_fn(void *commst, void *nst,
482 typedef void comm_release_notify_fn(void *commst, void *nst,
484 typedef bool_t comm_sendmsg_fn(void *commst, struct buffer_if *buf,
485 const struct comm_addr *dest,
486 struct comm_clientinfo* /* 0 OK */);
487 /* Only returns false if (we know that) the local network
488 * environment is such that this address cannot work; transient
489 * or unknown/unexpected failures return true. */
490 typedef const char *comm_addr_to_string_fn(void *commst,
491 const struct comm_addr *ca);
492 /* Returned string is in a static buffer. */
495 comm_clientinfo_fn *clientinfo;
496 comm_request_notify_fn *request_notify;
497 comm_release_notify_fn *release_notify;
498 comm_sendmsg_fn *sendmsg;
499 comm_addr_to_string_fn *addr_to_string;
502 bool_t iaddr_equal(const union iaddr *ia, const union iaddr *ib,
505 static inline const char *comm_addr_to_string(const struct comm_addr *ca)
507 return ca->comm->addr_to_string(ca->comm->st, ca);
510 static inline bool_t comm_addr_equal(const struct comm_addr *a,
511 const struct comm_addr *b)
513 return a->comm==b->comm && iaddr_equal(&a->ia,&b->ia,False);
518 #define LOG_MESSAGE_BUFLEN 1023
520 typedef void log_msg_fn(void *st, int class, const char *message, ...);
521 typedef void log_vmsg_fn(void *st, int class, const char *message,
525 log_vmsg_fn *vlogfn; /* printf format checking. Use [v]slilog instead */
526 char buff[LOG_MESSAGE_BUFLEN+1];
528 /* (convenience functions, defined in util.c) */
529 extern void slilog(struct log_if *lf, int class, const char *message, ...)
531 extern void vslilog(struct log_if *lf, int class, const char *message, va_list)
534 /* Versions which take (parts of) (multiple) messages, using \n to
535 * distinguish one message from another. */
536 extern void slilog_part(struct log_if *lf, int class, const char *message, ...)
538 extern void vslilog_part(struct log_if *lf, int class, const char *message,
539 va_list) FORMAT(printf,3,0);
543 /* Pretty much a placeholder; allows starting and stopping of processing,
545 typedef void site_control_fn(void *st, bool_t run);
546 typedef uint32_t site_status_fn(void *st);
549 site_control_fn *control;
550 site_status_fn *status;
553 /* TRANSFORM interface */
555 /* A reversable transformation. Transforms buffer in-place; may add
556 data to start or end. (Reverse transformations decrease
557 length, of course.) Transformations may be key-dependent, in which
558 case key material is passed in at initialisation time. They may
559 also depend on internal factors (eg. time) and keep internal
560 state. A struct transform_if only represents a particular type of
561 transformation; instances of the transformation (eg. with
562 particular key material) have a different C type. The same
563 secret key will be used in opposite directions between a pair of
564 secnets; one of these pairs will get direction==False, the other True. */
566 typedef struct transform_inst_if *transform_createinstance_fn(void *st);
567 typedef bool_t transform_setkey_fn(void *st, uint8_t *key, int32_t keylen,
569 typedef bool_t transform_valid_fn(void *st); /* 0: no key; 1: ok */
570 typedef void transform_delkey_fn(void *st);
571 typedef void transform_destroyinstance_fn(void *st);
574 transform_apply_ok = 0, /* all is well (everyone may assume==0) */
575 transform_apply_err = 1, /* any other problem */
576 transform_apply_seqrange = 2,
577 /* message decrypted but sequence number was out of recent range */
578 transform_apply_seqdupe = 3,
579 /* message decrypted but was dupe of recent packet */
580 } transform_apply_return;
583 transform_apply_return_badseq(transform_apply_return problem) {
584 return problem == transform_apply_seqrange ||
585 problem == transform_apply_seqdupe;
588 typedef transform_apply_return transform_apply_fn(void *st,
589 struct buffer_if *buf, const char **errmsg);
591 struct transform_inst_if {
593 transform_setkey_fn *setkey;
594 transform_valid_fn *valid;
595 transform_delkey_fn *delkey;
596 transform_apply_fn *forwards;
597 transform_apply_fn *reverse;
598 transform_destroyinstance_fn *destroy;
601 struct transform_if {
604 int32_t keylen; /* <<< INT_MAX */
605 transform_createinstance_fn *create;
608 /* NETLINK interface */
610 /* Used by netlink to deliver to site, and by site to deliver to
611 netlink. cid is the client identifier returned by
612 netlink_regnets_fn. If buf has size 0 then the function is just
613 being called for its site-effects (eg. making the site code attempt
614 to bring up a network link) */
615 typedef void netlink_deliver_fn(void *st, struct buffer_if *buf);
616 /* site code can tell netlink when outgoing packets will be dropped,
617 so netlink can generate appropriate ICMP and make routing decisions */
618 #define LINK_QUALITY_UNUSED 0 /* This link is unused, do not make this netlink */
619 #define LINK_QUALITY_DOWN 1 /* No chance of a packet being delivered right away*/
620 #define LINK_QUALITY_DOWN_STALE_ADDRESS 2 /* Link down, old address information */
621 #define LINK_QUALITY_DOWN_CURRENT_ADDRESS 3 /* Link down, current address information */
622 #define LINK_QUALITY_UP 4 /* Link active */
623 #define MAXIMUM_LINK_QUALITY 3
624 typedef void netlink_link_quality_fn(void *st, uint32_t quality);
625 typedef void netlink_register_fn(void *st, netlink_deliver_fn *deliver,
626 void *dst, uint32_t *localmtu_r /* NULL ok */);
627 typedef void netlink_output_config_fn(void *st, struct buffer_if *buf);
628 typedef bool_t netlink_check_config_fn(void *st, struct buffer_if *buf);
629 typedef void netlink_set_mtu_fn(void *st, int32_t new_mtu);
632 netlink_register_fn *reg;
633 netlink_deliver_fn *deliver;
634 netlink_link_quality_fn *set_quality;
635 netlink_set_mtu_fn *set_mtu;
640 /* Returns public key as a malloced hex string */
641 typedef string_t dh_makepublic_fn(void *st, uint8_t *secret,
643 /* Fills buffer (up to buflen) with shared secret */
644 typedef void dh_makeshared_fn(void *st, uint8_t *secret,
645 int32_t secretlen, cstring_t rempublic,
646 uint8_t *sharedsecret, int32_t buflen);
649 int32_t len; /* Approximate size of modulus in bytes */
650 int32_t ceil_len; /* Number of bytes just sufficient to contain modulus */
651 dh_makepublic_fn *makepublic;
652 dh_makeshared_fn *makeshared;
657 typedef void hash_init_fn(void *st /* slen bytes alloc'd by caller */);
658 typedef void hash_update_fn(void *st, const void *buf, int32_t len);
659 typedef void hash_final_fn(void *st, uint8_t *digest /* hlen bytes */);
661 int32_t slen; /* State length in bytes */
662 int32_t hlen; /* Hash output length in bytes */
664 hash_update_fn *update;
665 hash_final_fn *final;
668 /* BUFFER interface */
672 cstring_t owner; /* Set to constant string */
673 struct cloc loc; /* Where we were defined */
676 int32_t size; /* Size of buffer contents */
677 int32_t alloclen; /* Total length allocated at base */
680 /***** LOG functions *****/
682 #define M_DEBUG_CONFIG 0x001
683 #define M_DEBUG_PHASE 0x002
684 #define M_DEBUG 0x004
686 #define M_NOTICE 0x010
687 #define M_WARNING 0x020
689 #define M_SECURITY 0x080
690 #define M_FATAL 0x100
692 /* The fatal() family of functions require messages that do not end in '\n' */
693 extern NORETURN(fatal(const char *message, ...)) FORMAT(printf,1,2);
694 extern NORETURN(fatal_perror(const char *message, ...)) FORMAT(printf,1,2);
695 extern NORETURN(fatal_status(int status, const char *message, ...))
697 extern NORETURN(fatal_perror_status(int status, const char *message, ...))
700 /* Convenient nonfatal logging. Requires message that does not end in '\n'.
701 * If class contains M_FATAL, exits (after entering PHASE_SHUTDOWN).
702 * lg, errnoval and loc may sensibly be 0. desc must NOT be 0.
703 * lg_[v]perror save and restore errno. */
704 void lg_vperror(struct log_if *lg, const char *desc, struct cloc *loc,
705 int class, int errnoval, const char *fmt, va_list al)
707 void lg_perror(struct log_if *lg, const char *desc, struct cloc *loc,
708 int class, int errnoval, const char *fmt, ...)
710 void lg_exitstatus(struct log_if *lg, const char *desc, struct cloc *loc,
711 int class, int status, const char *progname);
713 /* The cfgfatal() family of functions require messages that end in '\n' */
714 extern NORETURN(cfgfatal(struct cloc loc, cstring_t facility,
715 const char *message, ...)) FORMAT(printf,3,4);
716 extern void cfgfile_postreadcheck(struct cloc loc, FILE *f);
717 extern NORETURN(vcfgfatal_maybefile(FILE *maybe_f, struct cloc loc,
718 cstring_t facility, const char *message,
721 extern NORETURN(cfgfatal_maybefile(FILE *maybe_f, struct cloc loc,
723 const char *message, ...))
726 extern void Message(uint32_t class, const char *message, ...)
728 extern void log_from_fd(int fd, cstring_t prefix, struct log_if *log);
730 /***** END of log functions *****/
732 #define STRING2(x) #x
733 #define STRING(x) STRING2(x)
735 #define FILLZERO(obj) (memset(&(obj),0,sizeof((obj))))
736 #define ARRAY_SIZE(ary) (sizeof((ary))/sizeof((ary)[0]))
739 * void COPY_OBJ( OBJECT& dst, const OBJECT& src);
740 * void COPY_ARRAY(OBJECT *dst, const OBJECT *src, INTEGER count);
741 * // Typesafe: we check that the type OBJECT is the same in both cases.
742 * // It is OK to use COPY_OBJ on an array object, provided dst is
743 * // _actually_ the whole array object and not decayed into a
744 * // pointer (e.g. a formal parameter).
746 #define COPY_OBJ(dst,src) \
747 (&(dst)==&(src), memcpy(&(dst),&(src),sizeof((dst))))
748 #define COPY_ARRAY(dst,src,count) \
749 (&(dst)[0]==&(src)[0], memcpy((dst),(src),sizeof((dst)[0])*(count)))
751 #endif /* secnet_h */