6 * Copyright (C) 1987 by the Massachusetts Institute of Technology
7 * For copying and distribution information, please see the file
13 static char *rcsid_sms_scall_c = "$Header$";
16 #include <mit-copyright.h>
17 #include <sys/types.h>
22 #include <netinet/in.h>
23 #include <arpa/inet.h>
26 #include "mr_server.h"
33 extern void clist_delete(), do_auth(), do_shutdown();
35 extern int dbms_errno, mr_errcode;
38 /* Put this in a variable so that we can patch it if necessary */
39 int max_row_count = 4096;
42 * Welcome to the (finite state) machine (highest level).
44 void do_client(client *cp)
49 if (OP_STATUS(cp->pending_op) == OP_CANCELLED)
52 "Closed connection (now %d client%s, %d new queries, %d old)",
53 nclients - 1, nclients != 2 ? "s" : "", newqueries, oldqueries);
55 /* if we no longer have any clients, and we're supposed to
56 * go down, then go down now.
58 if ((dormant == AWAKE) && (nclients == 0) &&
59 (stat(MOIRA_MOTD_FILE, &stbuf) == 0))
61 com_err(whoami, 0, "motd file exists, slumbertime");
70 /* Start recieving next request */
71 initialize_operation(cp->pending_op, mr_start_recv,
72 (char *)&cp->args, NULL);
73 queue_operation(cp->con, CON_INPUT, cp->pending_op);
74 cp->action = CL_RECEIVE;
77 /* Data is here. Process it & start it heading back */
78 do_call(cp); /* This may block for a while. */
79 mr_destroy_reply(cp->args);
81 initialize_operation(cp->pending_op, mr_start_send,
82 (char *)&cp->reply, NULL);
83 queue_operation(cp->con, CON_OUTPUT, cp->pending_op);
100 void do_call(client *cl)
103 cl->reply.mr_argc = 0;
104 cl->reply.mr_status = 0;
105 cl->reply.mr_version_no = cl->args->mr_version_no;
106 if (((pn = cl->args->mr_procno) < 0) || (pn > MR_MAX_PROC))
108 com_err(whoami, 0, "procno out of range");
109 cl->reply.mr_status = MR_UNKNOWN_PROC;
112 if (log_flags & LOG_ARGS)
114 log_args(procnames[pn], cl->args->mr_version_no,
115 cl->args->mr_argc, cl->args->mr_argv);
117 else if (log_flags & LOG_REQUESTS)
118 com_err(whoami, 0, "%s", procnames[pn]);
120 if ((dormant == ASLEEP || dormant == GROGGY) &&
121 pn != MR_NOOP && pn != MR_MOTD)
123 cl->reply.mr_status = MR_DOWN;
124 if (log_flags & LOG_RES)
125 com_err(whoami, MR_DOWN, "(query refused)");
129 /* make sure this gets cleared before every operation */
135 cl->reply.mr_status = 0;
155 trigger_dcm(0, 0, cl);
164 free_rtn_tuples(client *cp)
166 returned_tuples *temp;
167 for (temp = cp->first; temp && OP_DONE(temp->op); )
169 returned_tuples *t1 = temp;
174 mr_destroy_reply(t1->retval);
175 delete_operation(t1->op);
181 retr_callback(int argc, char **argv, char *p_cp)
183 client *cp = (client *)p_cp;
190 if (row_count++ >= max_row_count)
192 dbms_errno = mr_errcode = MR_NO_MEM;
197 * This takes too much advantage of the fact that
198 * serialization of the data happens during the queue operation.
200 arg_tmp = db_alloc(sizeof(mr_params));
201 tp = db_alloc(sizeof(returned_tuples));
202 nargv = malloc(argc * sizeof(char *));
204 op_tmp = create_operation();
206 if (mr_trim_args(argc, argv) == MR_NO_MEM)
207 com_err(whoami, MR_NO_MEM, "while trimming args");
208 if (log_flags & LOG_RESP)
209 log_args("return: ", cp->args->mr_version_no, argc, argv);
212 tp->retval = arg_tmp;
215 arg_tmp->mr_status = MR_MORE_DATA;
216 arg_tmp->mr_version_no = cp->args->mr_version_no;
217 arg_tmp->mr_argc = argc;
218 arg_tmp->mr_argv = nargv;
219 for (i = 0; i < argc; i++)
221 int len = strlen(argv[i]) + 1;
222 nargv[i] = malloc(len);
223 memcpy(nargv[i], argv[i], len);
225 arg_tmp->mr_flattened = NULL;
226 arg_tmp->mr_argl = NULL;
233 cp->last = cp->first = tp;
235 reset_operation(op_tmp);
236 initialize_operation(op_tmp, mr_start_send, (char *)arg_tmp, NULL);
237 queue_operation(cp->con, CON_OUTPUT, op_tmp);
240 int list_users(int (*callbk)(), char *callarg)
246 extern client **clients;
250 for (i = 0; i < nclients; i++)
252 client *cl = clients[i];
254 argv[0] = cl->clname;
255 else argv[0] = "unauthenticated";
257 argv[1] = inet_ntoa(cl->haddr.sin_addr);
259 sprintf(buf, "port %d", ntohs(cl->haddr.sin_port));
260 argv[3] = ctime(&cl->last_time_used);
261 cp = strchr(argv[3], '\n');
265 sprintf(buf1, "[#%d]", cl->id);
266 (*callbk)(5, argv, callarg);
275 cl->reply.mr_argc = 0;
276 cl->reply.mr_status = 0;
279 if (cl->args->mr_argc < 1)
281 cl->reply.mr_status = MR_ARGS;
282 com_err(whoami, MR_ARGS, "got nameless query");
285 queryname = cl->args->mr_argv[0];
287 if (cl->args->mr_version_no == MR_VERSION_2)
292 if (!strcmp(queryname, "_list_users"))
293 cl->reply.mr_status = list_users(retr_callback, (char *)cl);
296 cl->reply.mr_status = mr_process_query(cl, queryname,
297 cl->args->mr_argc - 1,
298 cl->args->mr_argv + 1,
299 retr_callback, (char *)cl);
301 if (row_count >= max_row_count)
303 critical_alert("moirad", "attempted query %s with %d rows\n",
304 queryname, row_count);
307 if (log_flags & LOG_RES)
308 com_err(whoami, 0, "Query complete.");
311 do_access(client *cl)
313 if (cl->args->mr_argc < 1)
315 cl->reply.mr_status = MR_ARGS;
316 com_err(whoami, MR_ARGS, "got nameless access");
319 cl->reply.mr_argc = 0;
321 cl->reply.mr_status = mr_check_access(cl, cl->args->mr_argv[0],
322 cl->args->mr_argc - 1,
323 cl->args->mr_argv + 1);
325 com_err(whoami, 0, "Access check complete.");
329 /* trigger_dcm is also used as a followup routine to the
330 * set_server_host_override query, hence the two dummy arguments.
333 struct query pseudo_query = {
338 int trigger_dcm(int dummy0, int dummy1, client *cl)
343 cl->reply.mr_argc = 0;
345 if ((cl->reply.mr_status = check_query_access(&pseudo_query, 0, cl)))
346 return cl->reply.mr_status;
348 sprintf(prog, "%s/startdcm", BIN_DIR);
353 execl(prog, "startdcm", 0);
357 cl->reply.mr_status = errno;
373 cl->reply.mr_status = 0;
374 motd = open(MOIRA_MOTD_FILE, 0, O_RDONLY);
377 len = read(motd, buffer, sizeof(buffer) - 1);
381 retr_callback(1, arg, cl);
382 cl->reply.mr_status = 0;