Commit | Line | Data |
---|---|---|
2fe58dfd SE |
1 | /* Core interface of secnet, to be used by all modules */ |
2 | ||
3 | #ifndef secnet_h | |
4 | #define secnet_h | |
5 | ||
59635212 | 6 | #include "config.h" |
2fe58dfd | 7 | #include <stdlib.h> |
2fe58dfd | 8 | #include <stdarg.h> |
4f5e39ec | 9 | #include <stdio.h> |
b02b720a IJ |
10 | #include <string.h> |
11 | #include <assert.h> | |
4fb0f88d IJ |
12 | #include <fcntl.h> |
13 | #include <unistd.h> | |
2fe58dfd | 14 | #include <sys/poll.h> |
8689b3a9 SE |
15 | #include <sys/types.h> |
16 | #include <sys/time.h> | |
2fe58dfd | 17 | #include <netinet/in.h> |
cc420616 IJ |
18 | #include <arpa/inet.h> |
19 | ||
20 | #define MAX_PEER_ADDRS 5 | |
21 | /* send at most this many copies; honour at most that many addresses */ | |
22 | ||
23 | struct comm_if; | |
24 | struct comm_addr; | |
2fe58dfd | 25 | |
2fe58dfd | 26 | typedef char *string_t; |
fe5e9cc4 | 27 | typedef const char *cstring_t; |
09aecaa2 IJ |
28 | |
29 | #define False (_Bool)0 | |
30 | #define True (_Bool)1 | |
31 | typedef _Bool bool_t; | |
2fe58dfd | 32 | |
a32d56fb IJ |
33 | union iaddr { |
34 | struct sockaddr sa; | |
35 | struct sockaddr_in sin; | |
61dbc9e0 IJ |
36 | #ifdef CONFIG_IPV6 |
37 | struct sockaddr_in6 sin6; | |
38 | #endif | |
a32d56fb IJ |
39 | }; |
40 | ||
794f2398 | 41 | #define ASSERT(x) do { if (!(x)) { fatal("assertion failed line %d file " \ |
4f5e39ec | 42 | __FILE__,__LINE__); } } while(0) |
2fe58dfd | 43 | |
fcbc5905 IJ |
44 | /* from version.c */ |
45 | ||
46 | extern char version[]; | |
47 | ||
08ee90a2 IJ |
48 | /* from logmsg.c */ |
49 | extern uint32_t message_level; | |
50 | extern bool_t secnet_is_daemon; | |
51 | extern struct log_if *system_log; | |
52 | ||
53 | /* from process.c */ | |
54 | extern void start_signal_handling(void); | |
55 | ||
2fe58dfd SE |
56 | /***** CONFIGURATION support *****/ |
57 | ||
baa06aeb SE |
58 | extern bool_t just_check_config; /* If True then we're going to exit after |
59 | reading the configuration file */ | |
b2a56f7c | 60 | extern bool_t background; /* If True then we'll eventually run as a daemon */ |
baa06aeb | 61 | |
2fe58dfd SE |
62 | typedef struct dict dict_t; /* Configuration dictionary */ |
63 | typedef struct closure closure_t; | |
64 | typedef struct item item_t; | |
65 | typedef struct list list_t; /* A list of items */ | |
66 | ||
67 | /* Configuration file location, for error-reporting */ | |
68 | struct cloc { | |
fe5e9cc4 | 69 | cstring_t file; |
1caa23ff | 70 | int line; |
2fe58dfd SE |
71 | }; |
72 | ||
73 | /* Modules export closures, which can be invoked from the configuration file. | |
74 | "Invoking" a closure usually returns another closure (of a different | |
75 | type), but can actually return any configuration object. */ | |
76 | typedef list_t *(apply_fn)(closure_t *self, struct cloc loc, | |
77 | dict_t *context, list_t *data); | |
78 | struct closure { | |
fe5e9cc4 | 79 | cstring_t description; /* For debugging */ |
2fe58dfd SE |
80 | uint32_t type; /* Central registry... */ |
81 | apply_fn *apply; | |
82 | void *interface; /* Interface for use inside secnet; depends on type */ | |
83 | }; | |
84 | ||
85 | enum types { t_null, t_bool, t_string, t_number, t_dict, t_closure }; | |
86 | struct item { | |
87 | enum types type; | |
88 | union { | |
89 | bool_t bool; | |
90 | string_t string; | |
91 | uint32_t number; | |
92 | dict_t *dict; | |
93 | closure_t *closure; | |
94 | } data; | |
95 | struct cloc loc; | |
96 | }; | |
97 | ||
ff05a229 SE |
98 | /* Note that it is unwise to use this structure directly; use the list |
99 | manipulation functions instead. */ | |
2fe58dfd SE |
100 | struct list { |
101 | item_t *item; | |
102 | struct list *next; | |
103 | }; | |
104 | ||
105 | /* In the following two lookup functions, NULL means 'not found' */ | |
106 | /* Lookup a value in the specified dictionary, or its parents */ | |
fe5e9cc4 | 107 | extern list_t *dict_lookup(dict_t *dict, cstring_t key); |
2fe58dfd | 108 | /* Lookup a value in just the specified dictionary */ |
fe5e9cc4 | 109 | extern list_t *dict_lookup_primitive(dict_t *dict, cstring_t key); |
2fe58dfd | 110 | /* Add a value to the specified dictionary */ |
fe5e9cc4 | 111 | extern void dict_add(dict_t *dict, cstring_t key, list_t *val); |
2fe58dfd | 112 | /* Obtain an array of keys in the dictionary. malloced; caller frees */ |
fe5e9cc4 | 113 | extern cstring_t *dict_keys(dict_t *dict); |
2fe58dfd SE |
114 | |
115 | /* List-manipulation functions */ | |
116 | extern list_t *list_new(void); | |
a094a1ba | 117 | extern int32_t list_length(const list_t *a); |
2fe58dfd SE |
118 | extern list_t *list_append(list_t *a, item_t *i); |
119 | extern list_t *list_append_list(list_t *a, list_t *b); | |
120 | /* Returns an item from the list (index starts at 0), or NULL */ | |
1caa23ff | 121 | extern item_t *list_elem(list_t *l, int32_t index); |
2fe58dfd SE |
122 | |
123 | /* Convenience functions */ | |
124 | extern list_t *new_closure(closure_t *cl); | |
fe5e9cc4 SE |
125 | extern void add_closure(dict_t *dict, cstring_t name, apply_fn apply); |
126 | extern void *find_cl_if(dict_t *dict, cstring_t name, uint32_t type, | |
127 | bool_t fail_if_invalid, cstring_t desc, | |
2fe58dfd | 128 | struct cloc loc); |
fe5e9cc4 SE |
129 | extern item_t *dict_find_item(dict_t *dict, cstring_t key, bool_t required, |
130 | cstring_t desc, struct cloc loc); | |
131 | extern string_t dict_read_string(dict_t *dict, cstring_t key, bool_t required, | |
132 | cstring_t desc, struct cloc loc); | |
133 | extern uint32_t dict_read_number(dict_t *dict, cstring_t key, bool_t required, | |
134 | cstring_t desc, struct cloc loc, | |
135 | uint32_t def); | |
59230b9b | 136 | /* return value can safely be assigned to int32_t */ |
fe5e9cc4 SE |
137 | extern bool_t dict_read_bool(dict_t *dict, cstring_t key, bool_t required, |
138 | cstring_t desc, struct cloc loc, bool_t def); | |
9d3a4132 | 139 | struct flagstr { |
fe5e9cc4 | 140 | cstring_t name; |
9d3a4132 SE |
141 | uint32_t value; |
142 | }; | |
fe5e9cc4 SE |
143 | extern uint32_t string_to_word(cstring_t s, struct cloc loc, |
144 | struct flagstr *f, cstring_t desc); | |
9d3a4132 | 145 | extern uint32_t string_list_to_word(list_t *l, struct flagstr *f, |
fe5e9cc4 | 146 | cstring_t desc); |
2fe58dfd SE |
147 | |
148 | /***** END of configuration support *****/ | |
149 | ||
7138d0c5 SE |
150 | /***** UTILITY functions *****/ |
151 | ||
fe5e9cc4 SE |
152 | extern char *safe_strdup(const char *string, const char *message); |
153 | extern void *safe_malloc(size_t size, const char *message); | |
bb9d0561 | 154 | extern void *safe_malloc_ary(size_t size, size_t count, const char *message); |
2fe58dfd | 155 | |
4fb0f88d | 156 | void setcloexec(int fd); /* cannot fail */ |
6a06198c | 157 | void pipe_cloexec(int fd[2]); /* pipe(), setcloexec() twice; cannot fail */ |
4fb0f88d | 158 | |
fe5e9cc4 | 159 | extern int sys_cmd(const char *file, const char *argc, ...); |
4efd681a | 160 | |
698280de IJ |
161 | extern uint64_t now_global; |
162 | extern struct timeval tv_now_global; | |
163 | ||
164 | static const uint64_t *const now = &now_global; | |
165 | static const struct timeval *const tv_now = &tv_now_global; | |
166 | ||
167 | /* "now" is current program time, in milliseconds. It is derived | |
168 | from tv_now. Both are provided by the event loop. */ | |
169 | ||
2fe58dfd SE |
170 | /***** END of utility functions *****/ |
171 | ||
3abd18e8 IJ |
172 | /***** START of max_start_pad handling *****/ |
173 | ||
174 | extern int32_t site_max_start_pad, transform_max_start_pad, | |
175 | comm_max_start_pad; | |
176 | ||
177 | void update_max_start_pad(int32_t *our_module_global, int32_t our_instance); | |
178 | int32_t calculate_max_start_pad(void); | |
179 | ||
180 | /***** END of max_start_pad handling *****/ | |
181 | ||
2fe58dfd SE |
182 | /***** SCHEDULING support */ |
183 | ||
90a39563 IJ |
184 | /* If nfds_io is insufficient for your needs, set it to the required |
185 | number and return ERANGE. timeout is in milliseconds; if it is too | |
186 | high then lower it. It starts at -1 (==infinite) */ | |
2fe58dfd | 187 | typedef int beforepoll_fn(void *st, struct pollfd *fds, int *nfds_io, |
90a39563 IJ |
188 | int *timeout_io); |
189 | typedef void afterpoll_fn(void *st, struct pollfd *fds, int nfds); | |
2fe58dfd SE |
190 | |
191 | /* Register interest in the main loop of the program. Before a call | |
192 | to poll() your supplied beforepoll function will be called. After | |
193 | the call to poll() the supplied afterpoll function will be called. | |
194 | max_nfds is a _hint_ about the maximum number of struct pollfd | |
195 | structures you may require - you can always ask for more in | |
196 | *nfds_io. */ | |
197 | extern void register_for_poll(void *st, beforepoll_fn *before, | |
1caa23ff | 198 | afterpoll_fn *after, int32_t max_nfds, |
fe5e9cc4 | 199 | cstring_t desc); |
2fe58dfd SE |
200 | |
201 | /***** END of scheduling support */ | |
202 | ||
203 | /***** PROGRAM LIFETIME support */ | |
204 | ||
205 | /* The secnet program goes through a number of phases in its lifetime. | |
206 | Module code may arrange to be called just as various phases are | |
7b1a9fb7 RK |
207 | entered. |
208 | ||
209 | Remember to update the table in util.c if changing the set of | |
210 | phases. */ | |
2fe58dfd | 211 | |
42394c37 RK |
212 | enum phase { |
213 | PHASE_INIT, | |
214 | PHASE_GETOPTS, /* Process command-line arguments */ | |
215 | PHASE_READCONFIG, /* Parse and process configuration file */ | |
216 | PHASE_SETUP, /* Process information in configuration */ | |
7b1a9fb7 | 217 | PHASE_DAEMONIZE, /* Become a daemon (if necessary) */ |
42394c37 RK |
218 | PHASE_GETRESOURCES, /* Obtain all external resources */ |
219 | PHASE_DROPPRIV, /* Last chance for privileged operations */ | |
220 | PHASE_RUN, | |
221 | PHASE_SHUTDOWN, /* About to die; delete key material, etc. */ | |
222 | /* Keep this last: */ | |
223 | NR_PHASES, | |
224 | }; | |
2fe58dfd SE |
225 | |
226 | typedef void hook_fn(void *self, uint32_t newphase); | |
227 | bool_t add_hook(uint32_t phase, hook_fn *f, void *state); | |
228 | bool_t remove_hook(uint32_t phase, hook_fn *f, void *state); | |
229 | ||
7138d0c5 SE |
230 | extern uint32_t current_phase; |
231 | extern void enter_phase(uint32_t new_phase); | |
232 | ||
ff05a229 SE |
233 | /* Some features (like netlink 'soft' routes) require that secnet |
234 | retain root privileges. They should indicate that here when | |
235 | appropriate. */ | |
236 | extern bool_t require_root_privileges; | |
fe5e9cc4 | 237 | extern cstring_t require_root_privileges_explanation; |
9d3a4132 | 238 | |
2fe58dfd SE |
239 | /***** END of program lifetime support *****/ |
240 | ||
241 | /***** MODULE support *****/ | |
242 | ||
243 | /* Module initialisation function type - modules export one function of | |
244 | this type which is called to initialise them. For dynamically loaded | |
245 | modules it's called "secnet_module". */ | |
469fd1d9 | 246 | typedef void init_module(dict_t *dict); |
2fe58dfd | 247 | |
08ee90a2 IJ |
248 | extern void init_builtin_modules(dict_t *dict); |
249 | ||
250 | extern init_module resolver_module; | |
251 | extern init_module random_module; | |
252 | extern init_module udp_module; | |
253 | extern init_module util_module; | |
254 | extern init_module site_module; | |
b02b720a | 255 | extern init_module transform_eax_module; |
92a7d254 | 256 | extern init_module transform_cbcmac_module; |
08ee90a2 IJ |
257 | extern init_module netlink_module; |
258 | extern init_module rsa_module; | |
259 | extern init_module dh_module; | |
260 | extern init_module md5_module; | |
261 | extern init_module slip_module; | |
262 | extern init_module tun_module; | |
263 | extern init_module sha1_module; | |
264 | extern init_module log_module; | |
265 | ||
2fe58dfd SE |
266 | /***** END of module support *****/ |
267 | ||
268 | /***** CLOSURE TYPES and interface definitions *****/ | |
269 | ||
469fd1d9 SE |
270 | #define CL_PURE 0 |
271 | #define CL_RESOLVER 1 | |
272 | #define CL_RANDOMSRC 2 | |
273 | #define CL_RSAPUBKEY 3 | |
274 | #define CL_RSAPRIVKEY 4 | |
275 | #define CL_COMM 5 | |
276 | #define CL_IPIF 6 | |
277 | #define CL_LOG 7 | |
278 | #define CL_SITE 8 | |
279 | #define CL_TRANSFORM 9 | |
280 | #define CL_DH 11 | |
281 | #define CL_HASH 12 | |
282 | #define CL_BUFFER 13 | |
283 | #define CL_NETLINK 14 | |
2fe58dfd SE |
284 | |
285 | struct buffer_if; | |
286 | ||
287 | /* PURE closure requires no interface */ | |
288 | ||
289 | /* RESOLVER interface */ | |
290 | ||
291 | /* Answers to queries are delivered to a function of this | |
292 | type. 'address' will be NULL if there was a problem with the query. It | |
cc420616 IJ |
293 | will be freed once resolve_answer_fn returns. naddrs is the actual |
294 | size of the array at addrs; was_naddrs is the number of addresses | |
295 | actually found in the DNS, which may be bigger if addrs is equal | |
296 | to MAX_PEER_ADDRS (ie there were too many). */ | |
297 | typedef void resolve_answer_fn(void *st, const struct comm_addr *addrs, | |
298 | int naddrs, int was_naddrs); | |
fe5e9cc4 | 299 | typedef bool_t resolve_request_fn(void *st, cstring_t name, |
cc420616 | 300 | int remoteport, struct comm_if *comm, |
2fe58dfd SE |
301 | resolve_answer_fn *cb, void *cst); |
302 | struct resolver_if { | |
303 | void *st; | |
304 | resolve_request_fn *request; | |
305 | }; | |
306 | ||
307 | /* RANDOMSRC interface */ | |
308 | ||
309 | /* Return some random data. Returns TRUE for success. */ | |
1caa23ff | 310 | typedef bool_t random_fn(void *st, int32_t bytes, uint8_t *buff); |
2fe58dfd SE |
311 | |
312 | struct random_if { | |
313 | void *st; | |
314 | bool_t blocking; | |
315 | random_fn *generate; | |
316 | }; | |
317 | ||
318 | /* RSAPUBKEY interface */ | |
319 | ||
1caa23ff | 320 | typedef bool_t rsa_checksig_fn(void *st, uint8_t *data, int32_t datalen, |
fe5e9cc4 | 321 | cstring_t signature); |
2fe58dfd SE |
322 | struct rsapubkey_if { |
323 | void *st; | |
324 | rsa_checksig_fn *check; | |
325 | }; | |
326 | ||
327 | /* RSAPRIVKEY interface */ | |
328 | ||
1caa23ff | 329 | typedef string_t rsa_makesig_fn(void *st, uint8_t *data, int32_t datalen); |
2fe58dfd SE |
330 | struct rsaprivkey_if { |
331 | void *st; | |
332 | rsa_makesig_fn *sign; | |
333 | }; | |
334 | ||
335 | /* COMM interface */ | |
336 | ||
a15faeb2 IJ |
337 | struct comm_addr { |
338 | /* This struct is pure data; in particular comm's clients may | |
339 | freely copy it. */ | |
a15faeb2 | 340 | struct comm_if *comm; |
a32d56fb | 341 | union iaddr ia; |
08b62a6c | 342 | int ix; /* see comment `Re comm_addr.ix' in udp.c */ |
a15faeb2 IJ |
343 | }; |
344 | ||
2fe58dfd SE |
345 | /* Return True if the packet was processed, and shouldn't be passed to |
346 | any other potential receivers. */ | |
347 | typedef bool_t comm_notify_fn(void *state, struct buffer_if *buf, | |
a15faeb2 | 348 | const struct comm_addr *source); |
2fe58dfd SE |
349 | typedef void comm_request_notify_fn(void *commst, void *nst, |
350 | comm_notify_fn *fn); | |
351 | typedef void comm_release_notify_fn(void *commst, void *nst, | |
352 | comm_notify_fn *fn); | |
353 | typedef bool_t comm_sendmsg_fn(void *commst, struct buffer_if *buf, | |
a15faeb2 | 354 | const struct comm_addr *dest); |
855fb066 IJ |
355 | /* Only returns false if (we know that) the local network |
356 | * environment is such that this address cannot work; transient | |
357 | * or unknown/unexpected failures return true. */ | |
5edf478f IJ |
358 | typedef const char *comm_addr_to_string_fn(void *commst, |
359 | const struct comm_addr *ca); | |
360 | /* Returned string is in a static buffer. */ | |
2fe58dfd SE |
361 | struct comm_if { |
362 | void *st; | |
363 | comm_request_notify_fn *request_notify; | |
364 | comm_release_notify_fn *release_notify; | |
365 | comm_sendmsg_fn *sendmsg; | |
5edf478f | 366 | comm_addr_to_string_fn *addr_to_string; |
2fe58dfd SE |
367 | }; |
368 | ||
2093fb5c IJ |
369 | bool_t iaddr_equal(const union iaddr *ia, const union iaddr *ib); |
370 | ||
1a448682 IJ |
371 | static inline const char *comm_addr_to_string(const struct comm_addr *ca) |
372 | { | |
373 | return ca->comm->addr_to_string(ca->comm->st, ca); | |
374 | } | |
375 | ||
2093fb5c IJ |
376 | static inline bool_t comm_addr_equal(const struct comm_addr *a, |
377 | const struct comm_addr *b) | |
378 | { | |
379 | return a->comm==b->comm && iaddr_equal(&a->ia,&b->ia); | |
380 | } | |
381 | ||
2fe58dfd SE |
382 | /* LOG interface */ |
383 | ||
ff1dcd86 IJ |
384 | #define LOG_MESSAGE_BUFLEN 1023 |
385 | ||
fe5e9cc4 SE |
386 | typedef void log_msg_fn(void *st, int class, const char *message, ...); |
387 | typedef void log_vmsg_fn(void *st, int class, const char *message, | |
388 | va_list args); | |
2fe58dfd SE |
389 | struct log_if { |
390 | void *st; | |
779837e1 | 391 | log_vmsg_fn *vlogfn; /* printf format checking. Use [v]slilog instead */ |
ff1dcd86 | 392 | char buff[LOG_MESSAGE_BUFLEN+1]; |
2fe58dfd | 393 | }; |
59938e0e | 394 | /* (convenience functions, defined in util.c) */ |
040ee979 | 395 | extern void slilog(struct log_if *lf, int class, const char *message, ...) |
4f5e39ec | 396 | FORMAT(printf,3,4); |
59938e0e IJ |
397 | extern void vslilog(struct log_if *lf, int class, const char *message, va_list) |
398 | FORMAT(printf,3,0); | |
2fe58dfd | 399 | |
ff1dcd86 IJ |
400 | /* Versions which take (parts of) (multiple) messages, using \n to |
401 | * distinguish one message from another. */ | |
402 | extern void slilog_part(struct log_if *lf, int class, const char *message, ...) | |
403 | FORMAT(printf,3,4); | |
404 | extern void vslilog_part(struct log_if *lf, int class, const char *message, | |
405 | va_list) FORMAT(printf,3,0); | |
406 | ||
2fe58dfd SE |
407 | /* SITE interface */ |
408 | ||
409 | /* Pretty much a placeholder; allows starting and stopping of processing, | |
410 | key expiry, etc. */ | |
411 | typedef void site_control_fn(void *st, bool_t run); | |
412 | typedef uint32_t site_status_fn(void *st); | |
413 | struct site_if { | |
414 | void *st; | |
415 | site_control_fn *control; | |
416 | site_status_fn *status; | |
417 | }; | |
418 | ||
419 | /* TRANSFORM interface */ | |
420 | ||
421 | /* A reversable transformation. Transforms buffer in-place; may add | |
3abd18e8 | 422 | data to start or end. (Reverse transformations decrease |
2fe58dfd SE |
423 | length, of course.) Transformations may be key-dependent, in which |
424 | case key material is passed in at initialisation time. They may | |
425 | also depend on internal factors (eg. time) and keep internal | |
426 | state. A struct transform_if only represents a particular type of | |
427 | transformation; instances of the transformation (eg. with | |
0118121a IJ |
428 | particular key material) have a different C type. The same |
429 | secret key will be used in opposite directions between a pair of | |
430 | secnets; one of these pairs will get direction==False, the other True. */ | |
2fe58dfd SE |
431 | |
432 | typedef struct transform_inst_if *transform_createinstance_fn(void *st); | |
0118121a IJ |
433 | typedef bool_t transform_setkey_fn(void *st, uint8_t *key, int32_t keylen, |
434 | bool_t direction); | |
b67dab18 | 435 | typedef bool_t transform_valid_fn(void *st); /* 0: no key; 1: ok */ |
2fe58dfd SE |
436 | typedef void transform_delkey_fn(void *st); |
437 | typedef void transform_destroyinstance_fn(void *st); | |
07e4774c IJ |
438 | /* Returns: |
439 | * 0: all is well | |
440 | * 1: for any other problem | |
441 | * 2: message decrypted but sequence number was out of range | |
442 | */ | |
2fe58dfd | 443 | typedef uint32_t transform_apply_fn(void *st, struct buffer_if *buf, |
fe5e9cc4 | 444 | const char **errmsg); |
2fe58dfd SE |
445 | |
446 | struct transform_inst_if { | |
447 | void *st; | |
448 | transform_setkey_fn *setkey; | |
b67dab18 | 449 | transform_valid_fn *valid; |
2fe58dfd SE |
450 | transform_delkey_fn *delkey; |
451 | transform_apply_fn *forwards; | |
452 | transform_apply_fn *reverse; | |
453 | transform_destroyinstance_fn *destroy; | |
454 | }; | |
455 | ||
456 | struct transform_if { | |
457 | void *st; | |
5b5f297f | 458 | int capab_transformnum; |
3abd18e8 | 459 | int32_t keylen; /* <<< INT_MAX */ |
2fe58dfd SE |
460 | transform_createinstance_fn *create; |
461 | }; | |
462 | ||
463 | /* NETLINK interface */ | |
464 | ||
70dc107b SE |
465 | /* Used by netlink to deliver to site, and by site to deliver to |
466 | netlink. cid is the client identifier returned by | |
467 | netlink_regnets_fn. If buf has size 0 then the function is just | |
468 | being called for its site-effects (eg. making the site code attempt | |
469 | to bring up a network link) */ | |
469fd1d9 | 470 | typedef void netlink_deliver_fn(void *st, struct buffer_if *buf); |
4efd681a | 471 | /* site code can tell netlink when outgoing packets will be dropped, |
70dc107b | 472 | so netlink can generate appropriate ICMP and make routing decisions */ |
f208b9a9 IJ |
473 | #define LINK_QUALITY_UNUSED 0 /* This link is unused, do not make this netlink */ |
474 | #define LINK_QUALITY_DOWN 1 /* No chance of a packet being delivered right away*/ | |
475 | #define LINK_QUALITY_DOWN_STALE_ADDRESS 2 /* Link down, old address information */ | |
476 | #define LINK_QUALITY_DOWN_CURRENT_ADDRESS 3 /* Link down, current address information */ | |
477 | #define LINK_QUALITY_UP 4 /* Link active */ | |
70dc107b | 478 | #define MAXIMUM_LINK_QUALITY 3 |
469fd1d9 SE |
479 | typedef void netlink_link_quality_fn(void *st, uint32_t quality); |
480 | typedef void netlink_register_fn(void *st, netlink_deliver_fn *deliver, | |
1c085348 | 481 | void *dst, uint32_t *localmtu_r /* NULL ok */); |
794f2398 SE |
482 | typedef void netlink_output_config_fn(void *st, struct buffer_if *buf); |
483 | typedef bool_t netlink_check_config_fn(void *st, struct buffer_if *buf); | |
1caa23ff | 484 | typedef void netlink_set_mtu_fn(void *st, int32_t new_mtu); |
2fe58dfd SE |
485 | struct netlink_if { |
486 | void *st; | |
469fd1d9 | 487 | netlink_register_fn *reg; |
2fe58dfd | 488 | netlink_deliver_fn *deliver; |
70dc107b | 489 | netlink_link_quality_fn *set_quality; |
d3fe100d | 490 | netlink_set_mtu_fn *set_mtu; |
2fe58dfd SE |
491 | }; |
492 | ||
493 | /* DH interface */ | |
494 | ||
495 | /* Returns public key as a malloced hex string */ | |
496 | typedef string_t dh_makepublic_fn(void *st, uint8_t *secret, | |
1caa23ff | 497 | int32_t secretlen); |
2fe58dfd SE |
498 | /* Fills buffer (up to buflen) with shared secret */ |
499 | typedef void dh_makeshared_fn(void *st, uint8_t *secret, | |
1caa23ff IJ |
500 | int32_t secretlen, cstring_t rempublic, |
501 | uint8_t *sharedsecret, int32_t buflen); | |
2fe58dfd SE |
502 | struct dh_if { |
503 | void *st; | |
1caa23ff | 504 | int32_t len; /* Approximate size of modulus in bytes */ |
7c9ca4bd | 505 | int32_t ceil_len; /* Number of bytes just sufficient to contain modulus */ |
2fe58dfd SE |
506 | dh_makepublic_fn *makepublic; |
507 | dh_makeshared_fn *makeshared; | |
508 | }; | |
509 | ||
510 | /* HASH interface */ | |
511 | ||
512 | typedef void *hash_init_fn(void); | |
babd74ec | 513 | typedef void hash_update_fn(void *st, const void *buf, int32_t len); |
2fe58dfd SE |
514 | typedef void hash_final_fn(void *st, uint8_t *digest); |
515 | struct hash_if { | |
1caa23ff | 516 | int32_t len; /* Hash output length in bytes */ |
2fe58dfd SE |
517 | hash_init_fn *init; |
518 | hash_update_fn *update; | |
519 | hash_final_fn *final; | |
520 | }; | |
521 | ||
522 | /* BUFFER interface */ | |
523 | ||
524 | struct buffer_if { | |
525 | bool_t free; | |
fe5e9cc4 | 526 | cstring_t owner; /* Set to constant string */ |
2fe58dfd SE |
527 | uint32_t flags; /* How paranoid should we be? */ |
528 | struct cloc loc; /* Where we were defined */ | |
529 | uint8_t *base; | |
530 | uint8_t *start; | |
1caa23ff | 531 | int32_t size; /* Size of buffer contents */ |
10068344 | 532 | int32_t alloclen; /* Total length allocated at base */ |
2fe58dfd SE |
533 | }; |
534 | ||
4f5e39ec SE |
535 | /***** LOG functions *****/ |
536 | ||
537 | #define M_DEBUG_CONFIG 0x001 | |
538 | #define M_DEBUG_PHASE 0x002 | |
539 | #define M_DEBUG 0x004 | |
540 | #define M_INFO 0x008 | |
541 | #define M_NOTICE 0x010 | |
542 | #define M_WARNING 0x020 | |
543 | #define M_ERR 0x040 | |
544 | #define M_SECURITY 0x080 | |
545 | #define M_FATAL 0x100 | |
546 | ||
547 | /* The fatal() family of functions require messages that do not end in '\n' */ | |
779837e1 IJ |
548 | extern NORETURN(fatal(const char *message, ...)) FORMAT(printf,1,2); |
549 | extern NORETURN(fatal_perror(const char *message, ...)) FORMAT(printf,1,2); | |
550 | extern NORETURN(fatal_status(int status, const char *message, ...)) | |
551 | FORMAT(printf,2,3); | |
552 | extern NORETURN(fatal_perror_status(int status, const char *message, ...)) | |
553 | FORMAT(printf,2,3); | |
4f5e39ec SE |
554 | |
555 | /* The cfgfatal() family of functions require messages that end in '\n' */ | |
fe5e9cc4 | 556 | extern NORETURN(cfgfatal(struct cloc loc, cstring_t facility, |
779837e1 | 557 | const char *message, ...)) FORMAT(printf,3,4); |
4f5e39ec SE |
558 | extern void cfgfile_postreadcheck(struct cloc loc, FILE *f); |
559 | extern NORETURN(vcfgfatal_maybefile(FILE *maybe_f, struct cloc loc, | |
fe5e9cc4 | 560 | cstring_t facility, const char *message, |
779837e1 IJ |
561 | va_list)) |
562 | FORMAT(printf,4,0); | |
4f5e39ec | 563 | extern NORETURN(cfgfatal_maybefile(FILE *maybe_f, struct cloc loc, |
fe5e9cc4 | 564 | cstring_t facility, |
779837e1 IJ |
565 | const char *message, ...)) |
566 | FORMAT(printf,4,5); | |
4f5e39ec | 567 | |
fe5e9cc4 SE |
568 | extern void Message(uint32_t class, const char *message, ...) |
569 | FORMAT(printf,2,3); | |
570 | extern void log_from_fd(int fd, cstring_t prefix, struct log_if *log); | |
4f5e39ec SE |
571 | |
572 | /***** END of log functions *****/ | |
573 | ||
45cfab8c IJ |
574 | #define STRING2(x) #x |
575 | #define STRING(x) STRING2(x) | |
576 | ||
076bb54e | 577 | #define FILLZERO(obj) (memset(&(obj),0,sizeof((obj)))) |
9c99fe6a | 578 | #define ARRAY_SIZE(ary) (sizeof((ary))/sizeof((ary)[0])) |
076bb54e | 579 | |
8438de14 IJ |
580 | /* |
581 | * void COPY_OBJ( OBJECT& dst, const OBJECT& src); | |
582 | * void COPY_ARRAY(OBJECT *dst, const OBJECT *src, INTEGER count); | |
583 | * // Typesafe: we check that the type OBJECT is the same in both cases. | |
584 | * // It is OK to use COPY_OBJ on an array object, provided it's | |
585 | * // _actually_ the whole array object and not decayed into a | |
586 | * // pointer (e.g. a formal parameter). | |
587 | */ | |
588 | #define COPY_OBJ(dst,src) \ | |
589 | (&(dst)==&(src), memcpy(&(dst),&(src),sizeof((dst)))) | |
590 | #define COPY_ARRAY(dst,src,count) \ | |
591 | (&(dst)[0]==&(src)[0], memcpy((dst),(src),sizeof((dst)[0])*(count))) | |
592 | ||
2fe58dfd | 593 | #endif /* secnet_h */ |