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1 | /* | |
2 | * $Source$ | |
3 | * $Author$ | |
4 | * $Header$ | |
5 | * | |
6 | * Copyright (C) 1987 by the Massachusetts Institute of Technology | |
7 | * For copying and distribution information, please see the file | |
8 | * <mit-copyright.h>. | |
9 | * | |
10 | */ | |
11 | ||
12 | #ifndef lint | |
13 | static char *rcsid_sms_scall_c = "$Header$"; | |
14 | #endif lint | |
15 | ||
16 | #include <mit-copyright.h> | |
17 | #include <sys/types.h> | |
18 | #include <sys/stat.h> | |
19 | #include <sys/file.h> | |
20 | #include <krb.h> | |
21 | #include <errno.h> | |
22 | #include "query.h" | |
23 | #include "mr_server.h" | |
24 | extern char buf1[]; | |
25 | extern int nclients; | |
26 | extern char *whoami; | |
27 | extern char *malloc(); | |
28 | extern int errno; | |
29 | ||
30 | extern void clist_delete(), do_auth(), do_shutdown(); | |
31 | void do_call(); | |
32 | extern int ingres_errno, mr_errcode; | |
33 | static int row_count; | |
34 | ||
35 | /* Put this in a variable so that we can patch it if necessary */ | |
36 | int max_row_count = 2048; | |
37 | ||
38 | /* | |
39 | * Welcome to the (finite state) machine (highest level). | |
40 | */ | |
41 | void | |
42 | do_client(cp) | |
43 | client *cp; | |
44 | { | |
45 | struct stat stbuf; | |
46 | ||
47 | free_rtn_tuples(cp); | |
48 | if (OP_STATUS(cp->pending_op) == OP_CANCELLED) { | |
49 | com_err(whoami, 0, "Closed connection (now %d client%s, %d new queries, %d old)", | |
50 | nclients-1, | |
51 | nclients!=2?"s":"", | |
52 | newqueries, | |
53 | oldqueries); | |
54 | clist_delete(cp); | |
55 | /* if we no longer have any clients, and we're supposed to | |
56 | * go down, then go down now. | |
57 | */ | |
58 | if ((dormant == AWAKE) && (nclients == 0) && | |
59 | (stat(MOIRA_MOTD_FILE, &stbuf) == 0)) { | |
60 | com_err(whoami, 0, "motd file exists, slumbertime"); | |
61 | dormant = SLEEPY; | |
62 | } | |
63 | return; | |
64 | } | |
65 | switch (cp->action) { | |
66 | case CL_ACCEPT: | |
67 | case CL_SEND: | |
68 | /* Start recieving next request */ | |
69 | initialize_operation(cp->pending_op, mr_start_recv, | |
70 | (char *)&cp->args, (int (*)())NULL); | |
71 | queue_operation(cp->con, CON_INPUT, cp->pending_op); | |
72 | cp->action = CL_RECEIVE; | |
73 | break; | |
74 | case CL_RECEIVE: | |
75 | /* Data is here. Process it & start it heading back */ | |
76 | do_call(cp); /* This may block for a while. */ | |
77 | mr_destroy_reply(cp->args); | |
78 | cp->args = NULL; | |
79 | initialize_operation(cp->pending_op, mr_start_send, | |
80 | (char *)&cp->reply, (int (*)())NULL); | |
81 | queue_operation(cp->con, CON_OUTPUT, cp->pending_op); | |
82 | cp->action = CL_SEND; | |
83 | break; | |
84 | } | |
85 | } | |
86 | ||
87 | char *procnames[] = { | |
88 | "noop", | |
89 | "auth", | |
90 | "shutdown", | |
91 | "query", | |
92 | "access", | |
93 | "dcm", | |
94 | "motd", | |
95 | }; | |
96 | ||
97 | ||
98 | void | |
99 | do_call(cl) | |
100 | client *cl; | |
101 | { | |
102 | int pn; | |
103 | extern int ingres_errno; | |
104 | cl->reply.mr_argc = 0; | |
105 | cl->reply.mr_status = 0; | |
106 | cl->reply.mr_version_no = cl->args->mr_version_no; | |
107 | if (((pn = cl->args->mr_procno) < 0) || | |
108 | (pn > MR_MAX_PROC)) { | |
109 | com_err(whoami, 0, "procno out of range"); | |
110 | cl->reply.mr_status = MR_UNKNOWN_PROC; | |
111 | return; | |
112 | } | |
113 | if (log_flags & LOG_ARGS) | |
114 | log_args(procnames[pn], cl->args->mr_version_no, | |
115 | cl->args->mr_argc, cl->args->mr_argv); | |
116 | else if (log_flags & LOG_REQUESTS) | |
117 | com_err(whoami, 0, "%s", procnames[pn]); | |
118 | ||
119 | if ((dormant == ASLEEP || dormant == GROGGY) && | |
120 | pn != MR_NOOP && pn != MR_MOTD) { | |
121 | cl->reply.mr_status = MR_DOWN; | |
122 | if (log_flags & LOG_RES) | |
123 | com_err(whoami, MR_DOWN, "(query refused)"); | |
124 | return; | |
125 | } | |
126 | ||
127 | /* make sure this gets cleared before every operation */ | |
128 | ingres_errno = 0; | |
129 | ||
130 | switch(pn) { | |
131 | case MR_NOOP: | |
132 | cl->reply.mr_status = 0; | |
133 | return; | |
134 | ||
135 | case MR_AUTH: | |
136 | do_auth(cl); | |
137 | return; | |
138 | ||
139 | case MR_QUERY: | |
140 | do_retr(cl); | |
141 | return; | |
142 | ||
143 | case MR_ACCESS: | |
144 | do_access(cl); | |
145 | return; | |
146 | ||
147 | case MR_SHUTDOWN: | |
148 | do_shutdown(cl); | |
149 | return; | |
150 | ||
151 | case MR_DO_UPDATE: | |
152 | trigger_dcm(0, 0, cl); | |
153 | return; | |
154 | ||
155 | case MR_MOTD: | |
156 | get_motd(cl); | |
157 | return; | |
158 | } | |
159 | } | |
160 | ||
161 | free_rtn_tuples(cp) | |
162 | client *cp; | |
163 | { | |
164 | register returned_tuples *temp; | |
165 | for (temp=cp->first; temp && OP_DONE(temp->op); ) { | |
166 | register returned_tuples *t1=temp; | |
167 | temp = t1->next; | |
168 | if (t1 == cp->last) cp->last = NULL; | |
169 | ||
170 | mr_destroy_reply(t1->retval); | |
171 | delete_operation(t1->op); | |
172 | free(t1); | |
173 | } | |
174 | cp->first = temp; | |
175 | } | |
176 | ||
177 | retr_callback(argc, argv, p_cp) | |
178 | register int argc; | |
179 | register char **argv; | |
180 | char *p_cp; | |
181 | { | |
182 | register client *cp = (client *)p_cp; | |
183 | mr_params *arg_tmp; | |
184 | returned_tuples *tp; | |
185 | OPERATION op_tmp; | |
186 | register char **nargv; | |
187 | register int i; | |
188 | ||
189 | if (row_count++ >= max_row_count) { | |
190 | ingres_errno = mr_errcode = MR_NO_MEM; | |
191 | return; | |
192 | } | |
193 | ||
194 | /* | |
195 | * This takes too much advantage of the fact that | |
196 | * serialization of the data happens during the queue operation. | |
197 | */ | |
198 | arg_tmp = (mr_params *)db_alloc(sizeof(mr_params)); | |
199 | tp = (returned_tuples *)db_alloc(sizeof(returned_tuples)); | |
200 | nargv = (char **)malloc(argc * sizeof(char *)); | |
201 | ||
202 | op_tmp = create_operation(); | |
203 | ||
204 | if (mr_trim_args(argc, argv) == MR_NO_MEM) { | |
205 | com_err(whoami, MR_NO_MEM, "while trimming args"); | |
206 | } | |
207 | if (log_flags & LOG_RESP) | |
208 | log_args("return: ", cp->args->mr_version_no, argc, argv); | |
209 | ||
210 | tp->op = op_tmp; | |
211 | tp->retval = arg_tmp; | |
212 | tp->next = NULL; | |
213 | ||
214 | arg_tmp->mr_status = MR_MORE_DATA; | |
215 | arg_tmp->mr_version_no = cp->args->mr_version_no; | |
216 | arg_tmp->mr_argc = argc; | |
217 | arg_tmp->mr_argv = nargv; | |
218 | for (i = 0; i < argc; i++) { | |
219 | register int len = strlen(argv[i]) + 1; | |
220 | nargv[i] = malloc(len); | |
221 | bcopy(argv[i], nargv[i], len); | |
222 | } | |
223 | arg_tmp->mr_flattened = (char *)NULL; | |
224 | arg_tmp->mr_argl = (int *)NULL; | |
225 | ||
226 | if (cp->last) { | |
227 | cp->last->next = tp; | |
228 | cp->last = tp; | |
229 | } else { | |
230 | cp->last = cp->first = tp; | |
231 | } | |
232 | ||
233 | reset_operation(op_tmp); | |
234 | initialize_operation(op_tmp, mr_start_send, (char *)arg_tmp, | |
235 | (int (*)())NULL); | |
236 | queue_operation(cp->con, CON_OUTPUT, op_tmp); | |
237 | } | |
238 | ||
239 | list_users(callbk, callarg) | |
240 | int (*callbk)(); | |
241 | char *callarg; | |
242 | { | |
243 | char *argv[6]; | |
244 | char buf[30]; | |
245 | char buf1[30]; | |
246 | int i; | |
247 | extern client **clients; | |
248 | extern char *inet_ntoa(); | |
249 | char *cp; | |
250 | char *index(); | |
251 | char *ctime(); | |
252 | ||
253 | for (i = 0; i < nclients; i++) { | |
254 | register client *cl = clients[i]; | |
255 | if (cl->clname) | |
256 | argv[0] = cl->clname; | |
257 | else argv[0] = "unauthenticated"; | |
258 | ||
259 | argv[1] = inet_ntoa(cl->haddr.sin_addr); | |
260 | argv[2] = buf; | |
261 | sprintf(buf, "port %d", ntohs(cl->haddr.sin_port)); | |
262 | argv[3] = ctime(&cl->last_time_used); | |
263 | cp = index(argv[3], '\n'); | |
264 | if (cp) *cp = '\0'; | |
265 | argv[4] = buf1; | |
266 | sprintf(buf1, "[#%d]", cl->id); | |
267 | (*callbk)(5, argv, callarg); | |
268 | } | |
269 | return 0; | |
270 | } | |
271 | ||
272 | do_retr(cl) | |
273 | register client *cl; | |
274 | { | |
275 | register char *queryname; | |
276 | ||
277 | cl->reply.mr_argc = 0; | |
278 | cl->reply.mr_status = 0; | |
279 | row_count = 0; | |
280 | ||
281 | if (cl->args->mr_argc < 1) { | |
282 | cl->reply.mr_status = MR_ARGS; | |
283 | com_err(whoami, MR_ARGS, "got nameless query"); | |
284 | return; | |
285 | } | |
286 | queryname = cl->args->mr_argv[0]; | |
287 | ||
288 | if (cl->args->mr_version_no == MR_VERSION_2) | |
289 | newqueries++; | |
290 | else | |
291 | oldqueries++; | |
292 | ||
293 | if (strcmp(queryname, "_list_users") == 0) | |
294 | cl->reply.mr_status = list_users(retr_callback, (char *)cl); | |
295 | else { | |
296 | cl->reply.mr_status = | |
297 | mr_process_query(cl, | |
298 | queryname, | |
299 | cl->args->mr_argc-1, | |
300 | cl->args->mr_argv+1, | |
301 | retr_callback, | |
302 | (char *)cl); | |
303 | } | |
304 | if (row_count >= max_row_count) { | |
305 | critical_alert("moirad", "attempted query %s with %d rows\n", | |
306 | queryname, row_count); | |
307 | } | |
308 | ||
309 | if (log_flags & LOG_RES) | |
310 | com_err(whoami, 0, "Query complete."); | |
311 | } | |
312 | ||
313 | do_access(cl) | |
314 | client *cl; | |
315 | { | |
316 | if (cl->args->mr_argc < 1) { | |
317 | cl->reply.mr_status = MR_ARGS; | |
318 | com_err(whoami, MR_ARGS, "got nameless access"); | |
319 | return; | |
320 | } | |
321 | cl->reply.mr_argc = 0; | |
322 | ||
323 | cl->reply.mr_status = | |
324 | mr_check_access(cl, | |
325 | cl->args->mr_argv[0], | |
326 | cl->args->mr_argc-1, | |
327 | cl->args->mr_argv+1); | |
328 | ||
329 | com_err(whoami, 0, "Access check complete."); | |
330 | } | |
331 | ||
332 | ||
333 | /* trigger_dcm is also used as a followup routine to the | |
334 | * set_server_host_override query, hence the two dummy arguments. | |
335 | */ | |
336 | ||
337 | struct query pseudo_query = { | |
338 | "trigger_dcm", | |
339 | "tdcm", | |
340 | }; | |
341 | ||
342 | trigger_dcm(dummy0, dummy1, cl) | |
343 | int dummy0, dummy1; | |
344 | client *cl; | |
345 | { | |
346 | register int pid; | |
347 | char prog[128]; | |
348 | ||
349 | cl->reply.mr_argc = 0; | |
350 | ||
351 | if (cl->reply.mr_status = check_query_access(&pseudo_query, 0, cl) ) | |
352 | return(cl->reply.mr_status); | |
353 | ||
354 | sprintf(prog, "%s/startdcm", BIN_DIR); | |
355 | pid = vfork(); | |
356 | switch (pid) { | |
357 | case 0: | |
358 | for (dummy0 = getdtablesize() - 1; dummy0 > 2; dummy0--) | |
359 | close(dummy0); | |
360 | execl(prog, "startdcm", 0); | |
361 | exit(1); | |
362 | ||
363 | case -1: | |
364 | cl->reply.mr_status = errno; | |
365 | return(0); | |
366 | ||
367 | default: | |
368 | return(0); | |
369 | } | |
370 | } | |
371 | ||
372 | ||
373 | get_motd(cl) | |
374 | client *cl; | |
375 | { | |
376 | int motd, len; | |
377 | char buffer[1024]; | |
378 | char *arg[1]; | |
379 | ||
380 | arg[0] = buffer; | |
381 | cl->reply.mr_status = 0; | |
382 | motd = open(MOIRA_MOTD_FILE, 0, O_RDONLY); | |
383 | if (motd < 0) return; | |
384 | len = read(motd, buffer, sizeof(buffer) - 1); | |
385 | close(motd); | |
386 | buffer[len] = 0; | |
387 | row_count = 0; | |
388 | retr_callback(1, arg, cl); | |
389 | cl->reply.mr_status = 0; | |
390 | } |