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