2 \brief Public interface for libradsec. */
4 /* See the file COPYING for licensing information. */
6 #ifndef _RADSEC_RADSEC_H_
7 #define _RADSEC_RADSEC_H_ 1
12 #ifdef HAVE_SYS_TIME_H
15 #ifdef HAVE_ARPA_INET_H
16 #include <arpa/inet.h>
31 RSE_CONN_TYPE_MISMATCH = 5,
35 RSE_EVENT = 9, /* libevent error. */
40 RSE_SSLERR = 14, /* OpenSSL error. */
42 RSE_TIMEOUT_CONN = 16, /* Connection timeout. */
43 RSE_INVAL = 17, /* Invalid argument. */
44 RSE_TIMEOUT_IO = 18, /* I/O timeout. */
45 RSE_TIMEOUT = 19, /* High level timeout. */
48 RSE_PACKET_TOO_SMALL = 22,
49 RSE_PACKET_TOO_LARGE = 23,
50 RSE_ATTR_OVERFLOW = 24,
51 RSE_ATTR_TOO_SMALL = 25,
52 RSE_ATTR_TOO_LARGE = 26,
53 RSE_ATTR_UNKNOWN = 27,
54 RSE_ATTR_BAD_NAME = 28,
55 RSE_ATTR_VALUE_MALFORMED = 29,
56 RSE_ATTR_INVALID = 30,
57 RSE_TOO_MANY_ATTRS = 31,
58 RSE_ATTR_TYPE_UNKNOWN = 32,
59 RSE_MSG_AUTH_LEN = 33,
60 RSE_MSG_AUTH_WRONG = 34,
61 RSE_REQUEST_REQUIRED = 35,
62 RSE_INVALID_REQUEST_CODE = 36,
63 RSE_AUTH_VECTOR_WRONG = 37,
64 RSE_INVALID_RESPONSE_CODE = 38,
65 RSE_INVALID_RESPONSE_ID = 39,
66 RSE_INVALID_RESPONSE_SRC = 40,
67 RSE_NO_PACKET_DATA = 41,
68 RSE_VENDOR_UNKNOWN = 42,
75 RS_CONN_TYPE_NONE = 0,
81 typedef unsigned int rs_conn_type_t;
83 typedef enum rs_attr_type_t {
84 RS_TYPE_INVALID = 0, /**< Invalid data type */
85 RS_TYPE_STRING, /**< printable-text */
86 RS_TYPE_INTEGER, /**< a 32-bit unsigned integer */
87 RS_TYPE_IPADDR, /**< an IPv4 address */
88 RS_TYPE_DATE, /**< a 32-bit date, of seconds since January 1, 1970 */
89 RS_TYPE_OCTETS, /**< a sequence of binary octets */
90 RS_TYPE_IFID, /**< an Interface Id */
91 RS_TYPE_IPV6ADDR, /**< an IPv6 address */
92 RS_TYPE_IPV6PREFIX, /**< an IPv6 prefix */
93 RS_TYPE_BYTE, /**< an 8-bit integer */
94 RS_TYPE_SHORT, /**< a 16-bit integer */
97 #define PW_ACCESS_REQUEST 1
98 #define PW_ACCESS_ACCEPT 2
99 #define PW_ACCESS_REJECT 3
100 #define PW_ACCOUNTING_REQUEST 4
101 #define PW_ACCOUNTING_RESPONSE 5
102 #define PW_ACCOUNTING_STATUS 6
103 #define PW_PASSWORD_REQUEST 7
104 #define PW_PASSWORD_ACK 8
105 #define PW_PASSWORD_REJECT 9
106 #define PW_ACCOUNTING_MESSAGE 10
107 #define PW_ACCESS_CHALLENGE 11
108 #define PW_STATUS_SERVER 12
109 #define PW_STATUS_CLIENT 13
110 #define PW_DISCONNECT_REQUEST 40
111 #define PW_DISCONNECT_ACK 41
112 #define PW_DISCONNECT_NAK 42
113 #define PW_COA_REQUEST 43
114 #define PW_COA_ACK 44
115 #define PW_COA_NAK 45
117 #if defined (__cplusplus)
122 struct rs_context; /* radsec-impl.h */
123 struct rs_connection; /* radsec-impl.h */
124 struct rs_packet; /* radsec-impl.h */
125 struct rs_conn; /* radsec-impl.h */
126 struct rs_error; /* radsec-impl.h */
127 struct rs_peer; /* radsec-impl.h */
128 struct radius_packet; /* <radius/client.h> */
129 struct value_pair; /* <radius/client.h> */
130 struct event_base; /* <event2/event-internal.h> */
132 typedef void *(*rs_calloc_fp) (size_t nmemb, size_t size);
133 typedef void *(*rs_malloc_fp) (size_t size);
134 typedef void (*rs_free_fp) (void *ptr);
135 typedef void *(*rs_realloc_fp) (void *ptr, size_t size);
136 struct rs_alloc_scheme {
140 rs_realloc_fp realloc;
143 typedef void (*rs_conn_connected_cb) (void *user_data /* FIXME: peer? */ );
144 typedef void (*rs_conn_disconnected_cb) (void *user_data /* FIXME: reason? */ );
145 typedef void (*rs_conn_packet_received_cb) (struct rs_packet *packet,
147 typedef void (*rs_conn_packet_sent_cb) (void *user_data);
148 struct rs_conn_callbacks {
149 /** Callback invoked when the connection has been established. */
150 rs_conn_connected_cb connected_cb;
151 /** Callback invoked when the connection has been torn down. */
152 rs_conn_disconnected_cb disconnected_cb;
153 /** Callback invoked when a packet was received. */
154 rs_conn_packet_received_cb received_cb;
155 /** Callback invoked when a packet was successfully sent. */
156 rs_conn_packet_sent_cb sent_cb;
159 typedef struct value_pair rs_avp;
160 typedef const struct value_pair rs_const_avp;
162 /* Function prototypes. */
167 /** Create a context. Freed by calling \a rs_context_destroy. Note
168 that the context must not be freed before all other libradsec
169 objects have been freed.
171 \a ctx Address of pointer to a struct rs_context. This is the
172 output of this function.
174 \return RSE_OK (0) on success or RSE_NOMEM on out of memory. */
175 int rs_context_create(struct rs_context **ctx);
177 /** Free a context. Note that the context must not be freed before
178 all other libradsec objects have been freed. */
179 void rs_context_destroy(struct rs_context *ctx);
181 /** Set allocation scheme to use. \a scheme is the allocation scheme
182 to use, see \a rs_alloc_scheme. \return On success, RSE_OK (0) is
183 returned. On error, !0 is returned and a struct \a rs_error is
184 pushed on the error stack for the context. The error can be
185 accessed using \a rs_err_ctx_pop. */
186 int rs_context_set_alloc_scheme(struct rs_context *ctx,
187 struct rs_alloc_scheme *scheme);
189 /** Read configuration file. \a config_file is the path of the
190 configuration file to read. \return On success, RSE_OK (0) is
191 returned. On error, !0 is returned and a struct \a rs_error is
192 pushed on the error stack for the context. The error can be
193 accessed using \a rs_err_ctx_pop. */
194 int rs_context_read_config(struct rs_context *ctx, const char *config_file);
199 /** Create a connection. \a conn is the address of a pointer to an \a
200 rs_connection, the output. Free the connection using \a
201 rs_conn_destroy. Note that a connection must not be freed before
202 all packets associated with the connection have been freed. A
203 packet is associated with a connection when it's created (\a
204 rs_packet_create) or received (\a rs_conn_receive_packet).
206 If \a config is not NULL it should be the name of a configuration
207 found in the config file read in using \a rs_context_read_config.
208 \return On success, RSE_OK (0) is returned. On error, !0 is
209 returned and a struct \a rs_error is pushed on the error stack for
210 the context. The error can be accessed using \a
212 int rs_conn_create(struct rs_context *ctx,
213 struct rs_connection **conn,
216 /** Not implemented. */
217 int rs_conn_add_listener(struct rs_connection *conn,
219 const char *hostname,
221 /** Disconnect connection \a conn. \return RSE_OK (0) on success, !0
222 * on error. On error, errno is set appropriately. */
223 int rs_conn_disconnect (struct rs_connection *conn);
225 /** Disconnect and free memory allocated for connection \a conn. Note
226 that a connection must not be freed before all packets associated
227 with the connection have been freed. A packet is associated with
228 a connection when it's created (\a rs_packet_create) or received
229 (\a rs_conn_receive_packet). \return RSE_OK (0) on success, !0 *
230 on error. On error, errno is set appropriately. */
231 int rs_conn_destroy(struct rs_connection *conn);
233 /** Set connection type for \a conn. */
234 void rs_conn_set_type(struct rs_connection *conn, rs_conn_type_t type);
236 /** Not implemented. */
237 int rs_conn_set_eventbase(struct rs_connection *conn, struct event_base *eb);
239 /** Register callbacks \a cb for connection \a conn. */
240 void rs_conn_set_callbacks(struct rs_connection *conn,
241 struct rs_conn_callbacks *cb);
243 /** Remove callbacks for connection \a conn. */
244 void rs_conn_del_callbacks(struct rs_connection *conn);
246 /** Return callbacks registered for connection \a conn. \return
247 Installed callbacks are returned. */
248 struct rs_conn_callbacks *rs_conn_get_callbacks(struct rs_connection *conn);
250 /** Not implemented. */
251 int rs_conn_select_peer(struct rs_connection *conn, const char *name);
253 /** Not implemented. */
254 int rs_conn_get_current_peer(struct rs_connection *conn,
258 /** Special function used in blocking mode, i.e. with no callbacks
259 registered. For any other use of libradsec, a \a received_cb
260 callback should be registered using \a rs_conn_set_callbacks.
262 If \a req_msg is not NULL, a successfully received RADIUS message
263 is verified against it. If \a pkt_out is not NULL it will upon
264 return contain a pointer to an \a rs_packet containing the new
267 \return On error or if the connect (TCP only) or read times out,
268 \a pkt_out will not be changed and one or more errors are pushed
269 on \a conn (available through \a rs_err_conn_pop). */
270 int rs_conn_receive_packet(struct rs_connection *conn,
271 struct rs_packet *request,
272 struct rs_packet **pkt_out);
274 /** Get the file descriptor associated with connection \a conn.
275 * \return File descriptor. */
276 int rs_conn_fd(struct rs_connection *conn);
278 /** Set the timeout value for connection \a conn. */
279 void rs_conn_set_timeout(struct rs_connection *conn, struct timeval *tv);
281 /* Peer -- client and server. */
282 int rs_peer_create(struct rs_connection *conn, struct rs_peer **peer_out);
283 int rs_peer_set_address(struct rs_peer *peer,
284 const char *hostname,
285 const char *service);
286 int rs_peer_set_secret(struct rs_peer *peer, const char *secret);
287 void rs_peer_set_timeout(struct rs_peer *peer, int timeout);
288 void rs_peer_set_retries(struct rs_peer *peer, int retries);
293 /** Create a packet associated with connection \a conn. */
294 int rs_packet_create(struct rs_connection *conn, struct rs_packet **pkt_out);
296 /** Free all memory allocated for packet \a pkt. */
297 void rs_packet_destroy(struct rs_packet *pkt);
299 /** Send packet \a pkt on the connection associated with \a pkt. \a
300 user_data is sent to the \a rs_conn_packet_received_cb callback
301 registered with the connection. If no callback is registered with
302 the connection, the event loop is run by \a rs_packet_send and it
303 blocks until the packet has been succesfully sent.
305 \return On success, RSE_OK (0) is returned. On error, !0 is
306 returned and a struct \a rs_error is pushed on the error stack for
307 the connection. The error can be accessed using \a
309 int rs_packet_send(struct rs_packet *pkt, void *user_data);
311 /** Create a RADIUS authentication request packet associated with
312 connection \a conn. Optionally, User-Name and User-Password
313 attributes are added to the packet using the data in \a user_name
315 int rs_packet_create_authn_request(struct rs_connection *conn,
316 struct rs_packet **pkt,
317 const char *user_name,
318 const char *user_pw);
320 /*** Append \a tail to packet \a pkt. */
322 rs_packet_append_avp(struct rs_packet *pkt,
323 unsigned int attribute, unsigned int vendor,
324 const void *data, size_t data_len);
326 /*** Get pointer to \a pkt attribute value pairs. */
328 rs_packet_avps(struct rs_packet *pkt, rs_avp ***vps);
330 /*** Get RADIUS packet type of \a pkt. */
332 rs_packet_code(struct rs_packet *pkt);
334 /*** Get RADIUS AVP from \a pkt. */
336 rs_packet_find_avp(struct rs_packet *pkt, unsigned int attr, unsigned int vendor);
338 /*** Set packet identifier in \a pkt; returns old identifier */
340 rs_packet_set_id (struct rs_packet *pkt, int id);
345 /** Find the realm named \a name in the configuration file previoiusly
346 read in using \a rs_context_read_config. */
347 struct rs_realm *rs_conf_find_realm(struct rs_context *ctx, const char *name);
352 /** Create a struct \a rs_error and push it on a FIFO associated with
353 context \a ctx. Note: The depth of the error stack is one (1) at
354 the moment. This will change in a future release. */
355 int rs_err_ctx_push(struct rs_context *ctx, int code, const char *fmt, ...);
356 int rs_err_ctx_push_fl(struct rs_context *ctx,
362 /** Pop the first error from the error FIFO associated with context \a
363 ctx or NULL if there are no errors in the FIFO. */
364 struct rs_error *rs_err_ctx_pop(struct rs_context *ctx);
366 /** Create a struct \a rs_error and push it on a FIFO associated with
367 connection \a conn. Note: The depth of the error stack is one (1)
368 at the moment. This will change in a future release. */
369 int rs_err_conn_push(struct rs_connection *conn,
373 int rs_err_conn_push_fl(struct rs_connection *conn,
379 /** Pop the first error from the error FIFO associated with connection
380 \a conn or NULL if there are no errors in the FIFO. */
381 struct rs_error *rs_err_conn_pop(struct rs_connection *conn);
383 int rs_err_conn_peek_code (struct rs_connection *conn);
384 void rs_err_free(struct rs_error *err);
385 char *rs_err_msg(struct rs_error *err);
386 int rs_err_code(struct rs_error *err, int dofree_flag);
391 #define rs_avp_is_string(vp) (rs_avp_typeof(vp) == RS_TYPE_STRING)
392 #define rs_avp_is_integer(vp) (rs_avp_typeof(vp) == RS_TYPE_INTEGER)
393 #define rs_avp_is_ipaddr(vp) (rs_avp_typeof(vp) == RS_TYPE_IPADDR)
394 #define rs_avp_is_date(vp) (rs_avp_typeof(vp) == RS_TYPE_DATE)
395 #define rs_avp_is_octets(vp) (rs_avp_typeof(vp) == RS_TYPE_OCTETS)
396 #define rs_avp_is_ifid(vp) (rs_avp_typeof(vp) == RS_TYPE_IFID)
397 #define rs_avp_is_ipv6addr(vp) (rs_avp_typeof(vp) == RS_TYPE_IPV6ADDR)
398 #define rs_avp_is_ipv6prefix(vp) (rs_avp_typeof(vp) == RS_TYPE_IPV6PREFIX)
399 #define rs_avp_is_byte(vp) (rs_avp_typeof(vp) == RS_TYPE_BYTE)
400 #define rs_avp_is_short(vp) (rs_avp_typeof(vp) == RS_TYPE_SHORT)
401 #define rs_avp_is_tlv(vp) (rs_avp_typeof(vp) == RS_TYPE_TLV)
403 /** The maximum length of a RADIUS attribute.
405 * The RFCs require that a RADIUS attribute transport no more than
406 * 253 octets of data. We add an extra byte for a trailing NUL, so
407 * that the VALUE_PAIR::vp_strvalue field can be handled as a C
410 #define RS_MAX_STRING_LEN 254
412 /** Free the AVP list \a vps */
414 rs_avp_free(rs_avp **vps);
416 /** Return the length of AVP \a vp in bytes */
418 rs_avp_length(rs_const_avp *vp);
420 /** Return the type of \a vp */
422 rs_avp_typeof(rs_const_avp *vp);
424 /** Retrieve the attribute and vendor ID of \a vp */
426 rs_avp_attrid(rs_const_avp *vp, unsigned int *attr, unsigned int *vendor);
428 /** Add \a vp to the list pointed to by \a head */
430 rs_avp_append(rs_avp **head, rs_avp *vp);
432 /** Find an AVP in \a vp that matches \a attr and \a vendor */
434 rs_avp_find(rs_avp *vp, unsigned int attr, unsigned int vendor);
436 /** Find an AVP in \a vp that matches \a attr and \a vendor */
438 rs_avp_find_const(rs_const_avp *vp, unsigned int attr, unsigned int vendor);
440 /** Alloc a new AVP for \a attr and \a vendor */
442 rs_avp_alloc(unsigned int attr, unsigned int vendor);
444 /** Duplicate existing AVP \a vp */
446 rs_avp_dup(rs_const_avp *vp);
448 /** Remove matching AVP from list \a vps */
450 rs_avp_delete(rs_avp **vps, unsigned int attr, unsigned int vendor);
452 /** Return next AVP in list */
454 rs_avp_next(rs_avp *vp);
456 /** Return next AVP in list */
458 rs_avp_next_const(rs_const_avp *avp);
460 /** Return string value of \a vp */
462 rs_avp_string_value(rs_const_avp *vp);
464 /** Set AVP \a vp to string \a str */
466 rs_avp_string_set(rs_avp *vp, const char *str);
468 /** Return integer value of \a vp */
470 rs_avp_integer_value(rs_const_avp *vp);
472 /** Set AVP \a vp to integer \a val */
474 rs_avp_integer_set(rs_avp *vp, uint32_t val);
476 /** Return IPv4 value of \a vp */
478 rs_avp_ipaddr_value(rs_const_avp *vp);
480 /** Set AVP \a vp to IPv4 address \a in */
482 rs_avp_ipaddr_set(rs_avp *vp, struct in_addr in);
484 /** Return POSIX time value of \a vp */
486 rs_avp_date_value(rs_const_avp *vp);
488 /** Set AVP \a vp to POSIX time \a date */
490 rs_avp_date_set(rs_avp *vp, time_t date);
492 /** Return constant pointer to octets in \a vp */
493 const unsigned char *
494 rs_avp_octets_value_const_ptr(rs_const_avp *vp);
496 /** Return pointer to octets in \a vp */
498 rs_avp_octets_value_ptr(rs_avp *vp);
500 /** Retrieve octet pointer \a p and length \a len from \a vp */
502 rs_avp_octets_value_byref(rs_avp *vp,
506 /** Copy octets from \a vp into \a buf and \a len */
508 rs_avp_octets_value(rs_const_avp *vp,
513 * Copy octets possibly fragmented across multiple VPs
514 * into \a buf and \a len
517 rs_avp_fragmented_value(rs_const_avp *vps,
521 /** Copy \a len octets in \a buf to AVP \a vp */
523 rs_avp_octets_set(rs_avp *vp,
524 const unsigned char *buf,
527 /** Return IFID value of \a vp */
529 rs_avp_ifid_value(rs_const_avp *vp, uint8_t val[8]);
532 rs_avp_ifid_set(rs_avp *vp, const uint8_t val[8]);
534 /** Return byte value of \a vp */
536 rs_avp_byte_value(rs_const_avp *vp);
538 /** Set AVP \a vp to byte \a val */
540 rs_avp_byte_set(rs_avp *vp, uint8_t val);
542 /** Return short value of \a vp */
544 rs_avp_short_value(rs_const_avp *vp);
546 /** Set AVP \a vp to short integer \a val */
548 rs_avp_short_set(rs_avp *vp, uint16_t val);
550 /** Display possibly \a canonical attribute name into \a buffer */
552 rs_attr_display_name (unsigned int attr,
558 /** Display AVP \a vp into \a buffer */
560 rs_avp_display_value(rs_const_avp *vp,
565 rs_attr_parse_name (const char *name,
567 unsigned int *vendor);
569 /** Lookup attribute \a name */
571 rs_attr_find(const char *name,
573 unsigned int *vendor);
575 /** Return dictionary name for AVP \a vp */
577 rs_avp_name(rs_const_avp *vp);
579 #if defined (__cplusplus)
583 #endif /* _RADSEC_RADSEC_H_ */
585 /* Local Variables: */
586 /* c-file-style: "stroustrup" */