8 #include <trp_internal.h>
10 /* Threading note: mutex lock is only used for protecting get_status() and set_status().
11 * If needed, locking for other operations (notably adding/removing connections) must be managed
12 * by whomever is holding on to the connection list. */
14 int trp_connection_lock(TRP_CONNECTION *conn)
16 return pthread_mutex_lock(&(conn->mutex));
19 int trp_connection_unlock(TRP_CONNECTION *conn)
21 return pthread_mutex_unlock(&(conn->mutex));
24 int trp_connection_get_fd(TRP_CONNECTION *conn)
29 void trp_connection_set_fd(TRP_CONNECTION *conn, int fd)
34 /* we use the gss name of the peer to identify it */
35 static TRP_RC trp_connection_set_peer(TRP_CONNECTION *conn)
37 OM_uint32 major_status=0;
38 OM_uint32 minor_status=0;
39 gss_name_t source_name=GSS_C_NO_NAME;
40 gss_name_t target_name=GSS_C_NO_NAME;
41 gss_buffer_desc peer_display_name={0,NULL};
44 major_status=gss_inquire_context(&minor_status,
45 *trp_connection_get_gssctx(conn),
54 if (major_status != GSS_S_COMPLETE) {
55 tr_err("trp_connection_set_peer: unable to identify GSS peer.");
56 if (source_name!=GSS_C_NO_NAME)
57 gss_release_name(&minor_status, &source_name);
58 if (target_name!=GSS_C_NO_NAME)
59 gss_release_name(&minor_status, &target_name);
64 /* we are the source, peer is the target */
65 major_status=gss_display_name(&minor_status, target_name, &peer_display_name, NULL);
67 /* we are the target, peer is the source */
68 major_status=gss_display_name(&minor_status, source_name, &peer_display_name, NULL);
70 gss_release_name(&minor_status, &source_name);
71 gss_release_name(&minor_status, &target_name);
73 conn->peer=tr_new_name(peer_display_name.value);
75 tr_err("trp_connection_set_peer: unable to allocate peer name.");
77 if (conn->peer->len != peer_display_name.length) {
78 tr_err("trp_connection_set_peer: error converting GSS display name to TR_NAME.");
79 tr_free_name(conn->peer);
83 gss_release_buffer(&minor_status, &peer_display_name);
88 tr_debug("trp_connection_set_peer: set peer for %p to %.*s (%p).", conn, conn->peer->len, conn->peer->buf, conn->peer);
92 TR_NAME *trp_connection_get_peer(TRP_CONNECTION *conn)
97 TR_NAME *trp_connection_get_gssname(TRP_CONNECTION *conn)
102 void trp_connection_set_gssname(TRP_CONNECTION *conn, TR_NAME *gssname)
104 conn->gssname=gssname;
107 gss_ctx_id_t *trp_connection_get_gssctx(TRP_CONNECTION *conn)
112 void trp_connection_set_gssctx(TRP_CONNECTION *conn, gss_ctx_id_t *gssctx)
117 TRP_CONNECTION_STATUS trp_connection_get_status(TRP_CONNECTION *conn)
119 TRP_CONNECTION_STATUS status=TRP_CONNECTION_UNKNOWN;
120 trp_connection_lock(conn);
122 trp_connection_unlock(conn);
126 static void trp_connection_set_status(TRP_CONNECTION *conn, TRP_CONNECTION_STATUS status)
128 TRP_CONNECTION_STATUS old_status=TRP_CONNECTION_UNKNOWN;
129 trp_connection_lock(conn);
130 old_status=conn->status;
132 trp_connection_unlock(conn);
133 if ((status!=old_status) && (conn->status_change_cb!=NULL))
134 conn->status_change_cb(conn, conn->status_change_cookie);
137 pthread_t *trp_connection_get_thread(TRP_CONNECTION *conn)
142 void trp_connection_set_thread(TRP_CONNECTION *conn, pthread_t *thread)
147 TRP_CONNECTION *trp_connection_get_next(TRP_CONNECTION *conn)
152 static void trp_connection_set_next(TRP_CONNECTION *conn, TRP_CONNECTION *next)
157 /* Ok to call more than once; guarantees connection no longer in the list. Does not free removed element.
158 * Returns handle to new list, you must replace your old handle on the list with this. */
159 TRP_CONNECTION *trp_connection_remove(TRP_CONNECTION *conn, TRP_CONNECTION *remove)
161 TRP_CONNECTION *cur=conn;
162 TRP_CONNECTION *last=NULL;
167 /* first element is a special case */
169 conn=trp_connection_get_next(cur); /* advance list head */
171 /* it was not the first element */
173 cur=trp_connection_get_next(cur);
176 trp_connection_set_next(last, trp_connection_get_next(cur));
180 cur=trp_connection_get_next(cur);
186 static TRP_CONNECTION *trp_connection_get_tail(TRP_CONNECTION *conn)
188 while((conn!=NULL)&&(trp_connection_get_next(conn)!=NULL))
189 conn=trp_connection_get_next(conn);
193 void trp_connection_append(TRP_CONNECTION *conn, TRP_CONNECTION *new)
195 trp_connection_set_next(trp_connection_get_tail(conn), new);
198 static void trp_connection_mutex_init(TRP_CONNECTION *conn)
200 pthread_mutex_init(&(conn->mutex), NULL);
203 /* talloc destructor for a connection: ensures connection is closed, memory freed */
204 static int trp_connection_destructor(void *object)
206 TRP_CONNECTION *conn=talloc_get_type_abort(object, TRP_CONNECTION); /* aborts on wrong type */
207 if ((trp_connection_get_status(conn)!=TRP_CONNECTION_CLOSED)
208 && (trp_connection_get_fd(conn)!=-1))
209 close(trp_connection_get_fd(conn));
210 if (conn->peer!=NULL)
211 tr_free_name(conn->peer);
212 if (conn->gssname!=NULL)
213 tr_free_name(conn->gssname);
217 TRP_CONNECTION *trp_connection_new(TALLOC_CTX *mem_ctx)
219 TRP_CONNECTION *new_conn=talloc(mem_ctx, TRP_CONNECTION);
220 gss_ctx_id_t *gssctx=NULL;
221 pthread_t *thread=NULL;
224 if (new_conn != NULL) {
225 trp_connection_set_next(new_conn, NULL);
226 trp_connection_set_fd(new_conn, -1);
227 trp_connection_set_gssname(new_conn, NULL);
228 trp_connection_mutex_init(new_conn);
229 new_conn->peer=NULL; /* no true set function for this */
230 new_conn->status_change_cb=NULL;
231 new_conn->status_change_cookie=NULL;
232 new_conn->status=TRP_CONNECTION_CLOSED;
234 thread=talloc(new_conn, pthread_t);
236 talloc_free(new_conn);
239 trp_connection_set_thread(new_conn, thread);
241 gssctx=talloc(new_conn, gss_ctx_id_t);
243 talloc_free(new_conn);
246 trp_connection_set_gssctx(new_conn, gssctx);
247 talloc_set_destructor((void *)new_conn, trp_connection_destructor);
252 void trp_connection_free(TRP_CONNECTION *conn)
257 void trp_connection_close(TRP_CONNECTION *conn)
259 if ((conn->status!=TRP_CONNECTION_DOWN) && (conn->fd>0))
260 close(trp_connection_get_fd(conn));
261 trp_connection_set_fd(conn, -1);
262 trp_connection_set_status(conn, TRP_CONNECTION_DOWN);
265 /* returns 0 on authorization success, 1 on failure, or -1 in case of error */
266 int trp_connection_auth(TRP_CONNECTION *conn, TRP_AUTH_FUNC auth_callback, void *callback_data)
269 int auth, autherr = 0;
270 gss_buffer_desc nameBuffer = {0, NULL};
271 gss_ctx_id_t *gssctx=trp_connection_get_gssctx(conn);
273 nameBuffer.length = trp_connection_get_gssname(conn)->len;
274 nameBuffer.value = tr_name_strdup(trp_connection_get_gssname(conn));
276 tr_debug("trp_connection_auth: beginning passive authentication");
277 if (trp_connection_get_status(conn)!=TRP_CONNECTION_AUTHORIZING)
278 tr_warning("trp_connection_auth: warning: connection was not in TRP_CONNECTION_AUTHORIZING state.");
280 rc = gsscon_passive_authenticate(trp_connection_get_fd(conn), nameBuffer, gssctx, auth_callback, callback_data);
281 gss_release_buffer(NULL, &nameBuffer);
283 tr_debug("trp_connection_auth: Error from gsscon_passive_authenticate(), rc = 0x%08X.", rc);
284 trp_connection_set_status(conn, TRP_CONNECTION_DOWN);
288 tr_debug("trp_connection_auth: beginning second stage authentication");
289 if (rc = gsscon_authorize(*gssctx, &auth, &autherr)) {
290 tr_debug("trp_connection_auth: Error from gsscon_authorize, rc = %d, autherr = %d.",
292 trp_connection_set_status(conn, TRP_CONNECTION_DOWN);
296 trp_connection_set_peer(conn);
297 trp_connection_set_status(conn, TRP_CONNECTION_UP);
300 tr_debug("trp_connection_auth: Connection authenticated, fd = %d.", trp_connection_get_fd(conn));
302 tr_debug("trp_connection_auth: Authentication failed, fd = %d.", trp_connection_get_fd(conn));
307 /* Accept connection */
308 TRP_CONNECTION *trp_connection_accept(TALLOC_CTX *mem_ctx, int listen, TR_NAME *gssname)
311 TRP_CONNECTION *conn=NULL;
313 conn_fd = accept(listen, NULL, NULL);
316 tr_notice("trp_connection_accept: accept() returned error.");
319 conn=trp_connection_new(mem_ctx);
320 trp_connection_set_fd(conn, conn_fd);
321 trp_connection_set_gssname(conn, gssname);
322 trp_connection_set_status(conn, TRP_CONNECTION_AUTHORIZING);
326 /* Initiate connection */
327 TRP_RC trp_connection_initiate(TRP_CONNECTION *conn, char *server, unsigned int port)
331 unsigned int use_port=0;
339 tr_err("trp_connection_initiate: null TRP_CONNECTION");
343 tr_debug("trp_connection_initiate: opening GSS connection to %s:%d",
346 err = gsscon_connect(server,
350 trp_connection_get_gssctx(conn));
352 tr_err("trp_connection_initiate: connection failed.");
355 tr_debug("trp_connection_initiate: connected.");
356 trp_connection_set_fd(conn, fd);
357 if (trp_connection_set_peer(conn)!=TRP_SUCCESS) {
358 tr_err("trp_connection_initiate: error setting peer gssname.");
359 trp_connection_close(conn);
362 trp_connection_set_status(conn, TRP_CONNECTION_UP);