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a3cf6921 | 1 | /* |
2 | * $Source$ | |
3 | * $Author$ | |
4 | * $Header$ | |
5 | * | |
6 | * Copyright (C) 1987 by the Massachusetts Institute of Technology | |
c801de4c | 7 | * For copying and distribution information, please see the file |
8 | * <mit-copyright.h>. | |
a3cf6921 | 9 | * |
a3cf6921 | 10 | */ |
11 | ||
12 | #ifndef lint | |
13 | static char *rcsid_sms_scall_c = "$Header$"; | |
14 | #endif lint | |
15 | ||
c801de4c | 16 | #include <mit-copyright.h> |
57c08162 | 17 | #include <sys/types.h> |
18 | #include <sys/stat.h> | |
9cad7c8f | 19 | #include <sys/file.h> |
a3cf6921 | 20 | #include <krb.h> |
78849033 | 21 | #include <errno.h> |
8165c536 | 22 | #include "query.h" |
d548a4e7 | 23 | #include "mr_server.h" |
a3cf6921 | 24 | extern char buf1[]; |
25 | extern int nclients; | |
26 | extern char *whoami; | |
8165c536 | 27 | extern int errno; |
a3cf6921 | 28 | |
29 | extern void clist_delete(), do_auth(), do_shutdown(); | |
30 | void do_call(); | |
78543660 | 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; | |
a3cf6921 | 36 | |
37 | /* | |
38 | * Welcome to the (finite state) machine (highest level). | |
39 | */ | |
40 | void | |
41 | do_client(cp) | |
42 | client *cp; | |
43 | { | |
57c08162 | 44 | struct stat stbuf; |
45 | ||
ed31e0d1 | 46 | free_rtn_tuples(cp); |
a3cf6921 | 47 | if (OP_STATUS(cp->pending_op) == OP_CANCELLED) { |
a36b5bd7 | 48 | com_err(whoami, 0, "Closed connection (now %d client%s, %d new queries, %d old)", |
f17535a4 | 49 | nclients-1, |
a36b5bd7 | 50 | nclients!=2?"s":"", |
51 | newqueries, | |
52 | oldqueries); | |
a3cf6921 | 53 | clist_delete(cp); |
57c08162 | 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) && | |
d548a4e7 | 58 | (stat(MOIRA_MOTD_FILE, &stbuf) == 0)) { |
57c08162 | 59 | com_err(whoami, 0, "motd file exists, slumbertime"); |
60 | dormant = SLEEPY; | |
61 | } | |
a3cf6921 | 62 | return; |
63 | } | |
64 | switch (cp->action) { | |
65 | case CL_ACCEPT: | |
66 | case CL_SEND: | |
67 | /* Start recieving next request */ | |
d548a4e7 | 68 | initialize_operation(cp->pending_op, mr_start_recv, |
5dbd09a0 | 69 | (char *)&cp->args, (int (*)())NULL); |
a3cf6921 | 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. */ | |
d548a4e7 | 76 | mr_destroy_reply(cp->args); |
de24f12d | 77 | cp->args = NULL; |
d548a4e7 | 78 | initialize_operation(cp->pending_op, mr_start_send, |
5dbd09a0 | 79 | (char *)&cp->reply, (int (*)())NULL); |
a3cf6921 | 80 | queue_operation(cp->con, CON_OUTPUT, cp->pending_op); |
81 | cp->action = CL_SEND; | |
82 | break; | |
83 | } | |
84 | } | |
85 | ||
a3cf6921 | 86 | char *procnames[] = { |
87 | "noop", | |
88 | "auth", | |
89 | "shutdown", | |
78849033 | 90 | "query", |
630e8323 | 91 | "access", |
57c08162 | 92 | "dcm", |
93 | "motd", | |
630e8323 | 94 | }; |
95 | ||
a3cf6921 | 96 | |
97 | void | |
98 | do_call(cl) | |
99 | client *cl; | |
100 | { | |
101 | int pn; | |
4ce8321c | 102 | extern int ingres_errno; |
d548a4e7 | 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)) { | |
a3cf6921 | 108 | com_err(whoami, 0, "procno out of range"); |
d548a4e7 | 109 | cl->reply.mr_status = MR_UNKNOWN_PROC; |
a3cf6921 | 110 | return; |
111 | } | |
630e8323 | 112 | if (log_flags & LOG_ARGS) |
d548a4e7 | 113 | log_args(procnames[pn], cl->args->mr_version_no, |
114 | cl->args->mr_argc, cl->args->mr_argv); | |
630e8323 | 115 | else if (log_flags & LOG_REQUESTS) |
f17535a4 | 116 | com_err(whoami, 0, "%s", procnames[pn]); |
a3cf6921 | 117 | |
57c08162 | 118 | if ((dormant == ASLEEP || dormant == GROGGY) && |
d548a4e7 | 119 | pn != MR_NOOP && pn != MR_MOTD) { |
120 | cl->reply.mr_status = MR_DOWN; | |
57c08162 | 121 | if (log_flags & LOG_RES) |
d548a4e7 | 122 | com_err(whoami, MR_DOWN, "(query refused)"); |
57c08162 | 123 | return; |
124 | } | |
125 | ||
4ce8321c | 126 | /* make sure this gets cleared before every operation */ |
127 | ingres_errno = 0; | |
128 | ||
a3cf6921 | 129 | switch(pn) { |
d548a4e7 | 130 | case MR_NOOP: |
131 | cl->reply.mr_status = 0; | |
a3cf6921 | 132 | return; |
3630192b | 133 | |
d548a4e7 | 134 | case MR_AUTH: |
a3cf6921 | 135 | do_auth(cl); |
136 | return; | |
78849033 | 137 | |
d548a4e7 | 138 | case MR_QUERY: |
a3cf6921 | 139 | do_retr(cl); |
140 | return; | |
a3cf6921 | 141 | |
d548a4e7 | 142 | case MR_ACCESS: |
3630192b | 143 | do_access(cl); |
144 | return; | |
145 | ||
d548a4e7 | 146 | case MR_SHUTDOWN: |
a3cf6921 | 147 | do_shutdown(cl); |
148 | return; | |
8165c536 | 149 | |
d548a4e7 | 150 | case MR_DO_UPDATE: |
a36b5bd7 | 151 | trigger_dcm(0, 0, cl); |
8165c536 | 152 | return; |
57c08162 | 153 | |
d548a4e7 | 154 | case MR_MOTD: |
57c08162 | 155 | get_motd(cl); |
156 | return; | |
a3cf6921 | 157 | } |
158 | } | |
159 | ||
ed31e0d1 | 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; | |
28222705 | 168 | |
d548a4e7 | 169 | mr_destroy_reply(t1->retval); |
ed31e0d1 | 170 | delete_operation(t1->op); |
171 | free(t1); | |
172 | } | |
173 | cp->first = temp; | |
174 | } | |
175 | ||
78849033 | 176 | retr_callback(argc, argv, p_cp) |
28222705 | 177 | register int argc; |
178 | register char **argv; | |
78849033 | 179 | char *p_cp; |
180 | { | |
181 | register client *cp = (client *)p_cp; | |
78543660 | 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 | ||
78849033 | 193 | /* |
194 | * This takes too much advantage of the fact that | |
195 | * serialization of the data happens during the queue operation. | |
196 | */ | |
78543660 | 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 *)); | |
ed31e0d1 | 200 | |
78543660 | 201 | op_tmp = create_operation(); |
78849033 | 202 | |
d548a4e7 | 203 | if (mr_trim_args(argc, argv) == MR_NO_MEM) { |
204 | com_err(whoami, MR_NO_MEM, "while trimming args"); | |
a36b5bd7 | 205 | } |
630e8323 | 206 | if (log_flags & LOG_RESP) |
d548a4e7 | 207 | log_args("return: ", cp->args->mr_version_no, argc, argv); |
630e8323 | 208 | |
ed31e0d1 | 209 | tp->op = op_tmp; |
210 | tp->retval = arg_tmp; | |
211 | tp->next = NULL; | |
78849033 | 212 | |
d548a4e7 | 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; | |
28222705 | 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 | } | |
d548a4e7 | 222 | arg_tmp->mr_flattened = (char *)NULL; |
223 | arg_tmp->mr_argl = (int *)NULL; | |
ed31e0d1 | 224 | |
225 | if (cp->last) { | |
226 | cp->last->next = tp; | |
227 | cp->last = tp; | |
228 | } else { | |
229 | cp->last = cp->first = tp; | |
230 | } | |
231 | ||
78849033 | 232 | reset_operation(op_tmp); |
d548a4e7 | 233 | initialize_operation(op_tmp, mr_start_send, (char *)arg_tmp, |
78849033 | 234 | (int (*)())NULL); |
235 | queue_operation(cp->con, CON_OUTPUT, op_tmp); | |
236 | } | |
237 | ||
de24f12d | 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; | |
de24f12d | 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 | } | |
78849033 | 269 | |
a3cf6921 | 270 | do_retr(cl) |
de24f12d | 271 | register client *cl; |
a3cf6921 | 272 | { |
de24f12d | 273 | register char *queryname; |
274 | ||
d548a4e7 | 275 | cl->reply.mr_argc = 0; |
276 | cl->reply.mr_status = 0; | |
78543660 | 277 | row_count = 0; |
630e8323 | 278 | |
c473dda1 | 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 | } | |
d548a4e7 | 284 | queryname = cl->args->mr_argv[0]; |
de24f12d | 285 | |
d548a4e7 | 286 | if (cl->args->mr_version_no == MR_VERSION_2) |
a36b5bd7 | 287 | newqueries++; |
288 | else | |
289 | oldqueries++; | |
290 | ||
de24f12d | 291 | if (strcmp(queryname, "_list_users") == 0) |
d548a4e7 | 292 | cl->reply.mr_status = list_users(retr_callback, (char *)cl); |
de24f12d | 293 | else { |
d548a4e7 | 294 | cl->reply.mr_status = |
295 | mr_process_query(cl, | |
c473dda1 | 296 | queryname, |
d548a4e7 | 297 | cl->args->mr_argc-1, |
298 | cl->args->mr_argv+1, | |
de24f12d | 299 | retr_callback, |
300 | (char *)cl); | |
301 | } | |
78543660 | 302 | if (row_count >= max_row_count) { |
303 | critical_alert("moirad", "attempted query %s with %d rows\n", | |
304 | queryname, row_count); | |
305 | } | |
306 | ||
630e8323 | 307 | if (log_flags & LOG_RES) |
308 | com_err(whoami, 0, "Query complete."); | |
a3cf6921 | 309 | } |
78849033 | 310 | |
3630192b | 311 | do_access(cl) |
312 | client *cl; | |
313 | { | |
c473dda1 | 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 | } | |
d548a4e7 | 319 | cl->reply.mr_argc = 0; |
630e8323 | 320 | |
d548a4e7 | 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); | |
3630192b | 326 | |
327 | com_err(whoami, 0, "Access check complete."); | |
328 | } | |
8165c536 | 329 | |
a36b5bd7 | 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 | ||
8165c536 | 335 | struct query pseudo_query = { |
336 | "trigger_dcm", | |
337 | "tdcm", | |
338 | }; | |
339 | ||
a36b5bd7 | 340 | trigger_dcm(dummy0, dummy1, cl) |
341 | int dummy0, dummy1; | |
8165c536 | 342 | client *cl; |
343 | { | |
344 | register int pid; | |
185f76ce | 345 | char prog[128]; |
346 | ||
d548a4e7 | 347 | cl->reply.mr_argc = 0; |
8165c536 | 348 | |
d548a4e7 | 349 | if (cl->reply.mr_status = check_query_access(&pseudo_query, 0, cl) ) |
350 | return(cl->reply.mr_status); | |
8165c536 | 351 | |
185f76ce | 352 | sprintf(prog, "%s/startdcm", BIN_DIR); |
8165c536 | 353 | pid = vfork(); |
354 | switch (pid) { | |
355 | case 0: | |
9ddf3daa | 356 | for (dummy0 = getdtablesize() - 1; dummy0 > 2; dummy0--) |
357 | close(dummy0); | |
185f76ce | 358 | execl(prog, "startdcm", 0); |
8165c536 | 359 | exit(1); |
360 | ||
361 | case -1: | |
d548a4e7 | 362 | cl->reply.mr_status = errno; |
a36b5bd7 | 363 | return(0); |
8165c536 | 364 | |
365 | default: | |
a36b5bd7 | 366 | return(0); |
8165c536 | 367 | } |
368 | } | |
369 | ||
57c08162 | 370 | |
371 | get_motd(cl) | |
372 | client *cl; | |
373 | { | |
9cad7c8f | 374 | int motd, len; |
57c08162 | 375 | char buffer[1024]; |
376 | char *arg[1]; | |
377 | ||
378 | arg[0] = buffer; | |
d548a4e7 | 379 | cl->reply.mr_status = 0; |
380 | motd = open(MOIRA_MOTD_FILE, 0, O_RDONLY); | |
9cad7c8f | 381 | if (motd < 0) return; |
382 | len = read(motd, buffer, sizeof(buffer) - 1); | |
383 | close(motd); | |
384 | buffer[len] = 0; | |
78543660 | 385 | row_count = 0; |
57c08162 | 386 | retr_callback(1, arg, cl); |
d548a4e7 | 387 | cl->reply.mr_status = 0; |
57c08162 | 388 | } |