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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> |
03c05291 | 20 | #include <fcntl.h> |
21 | #include <string.h> | |
a3cf6921 | 22 | #include <krb.h> |
78849033 | 23 | #include <errno.h> |
d548a4e7 | 24 | #include "mr_server.h" |
03c05291 | 25 | #include "query.h" |
a3cf6921 | 26 | extern char buf1[]; |
27 | extern int nclients; | |
28 | extern char *whoami; | |
8165c536 | 29 | extern int errno; |
a3cf6921 | 30 | |
31 | extern void clist_delete(), do_auth(), do_shutdown(); | |
32 | void do_call(); | |
03c05291 | 33 | extern int dbms_errno, mr_errcode; |
78543660 | 34 | static int row_count; |
35 | ||
36 | /* Put this in a variable so that we can patch it if necessary */ | |
37 | int max_row_count = 2048; | |
a3cf6921 | 38 | |
39 | /* | |
40 | * Welcome to the (finite state) machine (highest level). | |
41 | */ | |
42 | void | |
43 | do_client(cp) | |
44 | client *cp; | |
45 | { | |
57c08162 | 46 | struct stat stbuf; |
47 | ||
ed31e0d1 | 48 | free_rtn_tuples(cp); |
a3cf6921 | 49 | if (OP_STATUS(cp->pending_op) == OP_CANCELLED) { |
a36b5bd7 | 50 | com_err(whoami, 0, "Closed connection (now %d client%s, %d new queries, %d old)", |
f17535a4 | 51 | nclients-1, |
a36b5bd7 | 52 | nclients!=2?"s":"", |
53 | newqueries, | |
54 | oldqueries); | |
a3cf6921 | 55 | clist_delete(cp); |
57c08162 | 56 | /* if we no longer have any clients, and we're supposed to |
57 | * go down, then go down now. | |
58 | */ | |
59 | if ((dormant == AWAKE) && (nclients == 0) && | |
d548a4e7 | 60 | (stat(MOIRA_MOTD_FILE, &stbuf) == 0)) { |
57c08162 | 61 | com_err(whoami, 0, "motd file exists, slumbertime"); |
62 | dormant = SLEEPY; | |
63 | } | |
a3cf6921 | 64 | return; |
65 | } | |
66 | switch (cp->action) { | |
67 | case CL_ACCEPT: | |
68 | case CL_SEND: | |
69 | /* Start recieving next request */ | |
d548a4e7 | 70 | initialize_operation(cp->pending_op, mr_start_recv, |
5dbd09a0 | 71 | (char *)&cp->args, (int (*)())NULL); |
a3cf6921 | 72 | queue_operation(cp->con, CON_INPUT, cp->pending_op); |
73 | cp->action = CL_RECEIVE; | |
74 | break; | |
75 | case CL_RECEIVE: | |
76 | /* Data is here. Process it & start it heading back */ | |
77 | do_call(cp); /* This may block for a while. */ | |
d548a4e7 | 78 | mr_destroy_reply(cp->args); |
de24f12d | 79 | cp->args = NULL; |
d548a4e7 | 80 | initialize_operation(cp->pending_op, mr_start_send, |
5dbd09a0 | 81 | (char *)&cp->reply, (int (*)())NULL); |
a3cf6921 | 82 | queue_operation(cp->con, CON_OUTPUT, cp->pending_op); |
83 | cp->action = CL_SEND; | |
84 | break; | |
85 | } | |
86 | } | |
87 | ||
a3cf6921 | 88 | char *procnames[] = { |
89 | "noop", | |
90 | "auth", | |
91 | "shutdown", | |
78849033 | 92 | "query", |
630e8323 | 93 | "access", |
57c08162 | 94 | "dcm", |
95 | "motd", | |
630e8323 | 96 | }; |
97 | ||
a3cf6921 | 98 | |
99 | void | |
100 | do_call(cl) | |
101 | client *cl; | |
102 | { | |
103 | int pn; | |
d548a4e7 | 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)) { | |
a3cf6921 | 109 | com_err(whoami, 0, "procno out of range"); |
d548a4e7 | 110 | cl->reply.mr_status = MR_UNKNOWN_PROC; |
a3cf6921 | 111 | return; |
112 | } | |
630e8323 | 113 | if (log_flags & LOG_ARGS) |
d548a4e7 | 114 | log_args(procnames[pn], cl->args->mr_version_no, |
115 | cl->args->mr_argc, cl->args->mr_argv); | |
630e8323 | 116 | else if (log_flags & LOG_REQUESTS) |
f17535a4 | 117 | com_err(whoami, 0, "%s", procnames[pn]); |
a3cf6921 | 118 | |
57c08162 | 119 | if ((dormant == ASLEEP || dormant == GROGGY) && |
d548a4e7 | 120 | pn != MR_NOOP && pn != MR_MOTD) { |
121 | cl->reply.mr_status = MR_DOWN; | |
57c08162 | 122 | if (log_flags & LOG_RES) |
d548a4e7 | 123 | com_err(whoami, MR_DOWN, "(query refused)"); |
57c08162 | 124 | return; |
125 | } | |
126 | ||
4ce8321c | 127 | /* make sure this gets cleared before every operation */ |
03c05291 | 128 | dbms_errno = 0; |
4ce8321c | 129 | |
a3cf6921 | 130 | switch(pn) { |
d548a4e7 | 131 | case MR_NOOP: |
132 | cl->reply.mr_status = 0; | |
a3cf6921 | 133 | return; |
3630192b | 134 | |
d548a4e7 | 135 | case MR_AUTH: |
a3cf6921 | 136 | do_auth(cl); |
137 | return; | |
78849033 | 138 | |
d548a4e7 | 139 | case MR_QUERY: |
a3cf6921 | 140 | do_retr(cl); |
141 | return; | |
a3cf6921 | 142 | |
d548a4e7 | 143 | case MR_ACCESS: |
3630192b | 144 | do_access(cl); |
145 | return; | |
146 | ||
d548a4e7 | 147 | case MR_SHUTDOWN: |
a3cf6921 | 148 | do_shutdown(cl); |
149 | return; | |
8165c536 | 150 | |
d548a4e7 | 151 | case MR_DO_UPDATE: |
a36b5bd7 | 152 | trigger_dcm(0, 0, cl); |
8165c536 | 153 | return; |
57c08162 | 154 | |
d548a4e7 | 155 | case MR_MOTD: |
57c08162 | 156 | get_motd(cl); |
157 | return; | |
a3cf6921 | 158 | } |
159 | } | |
160 | ||
ed31e0d1 | 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; | |
28222705 | 169 | |
d548a4e7 | 170 | mr_destroy_reply(t1->retval); |
ed31e0d1 | 171 | delete_operation(t1->op); |
172 | free(t1); | |
173 | } | |
174 | cp->first = temp; | |
175 | } | |
176 | ||
78849033 | 177 | retr_callback(argc, argv, p_cp) |
28222705 | 178 | register int argc; |
179 | register char **argv; | |
78849033 | 180 | char *p_cp; |
181 | { | |
182 | register client *cp = (client *)p_cp; | |
78543660 | 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) { | |
03c05291 | 190 | dbms_errno = mr_errcode = MR_NO_MEM; |
78543660 | 191 | return; |
192 | } | |
193 | ||
78849033 | 194 | /* |
195 | * This takes too much advantage of the fact that | |
196 | * serialization of the data happens during the queue operation. | |
197 | */ | |
78543660 | 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 *)); | |
ed31e0d1 | 201 | |
78543660 | 202 | op_tmp = create_operation(); |
78849033 | 203 | |
d548a4e7 | 204 | if (mr_trim_args(argc, argv) == MR_NO_MEM) { |
205 | com_err(whoami, MR_NO_MEM, "while trimming args"); | |
a36b5bd7 | 206 | } |
630e8323 | 207 | if (log_flags & LOG_RESP) |
d548a4e7 | 208 | log_args("return: ", cp->args->mr_version_no, argc, argv); |
630e8323 | 209 | |
ed31e0d1 | 210 | tp->op = op_tmp; |
211 | tp->retval = arg_tmp; | |
212 | tp->next = NULL; | |
78849033 | 213 | |
d548a4e7 | 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; | |
28222705 | 218 | for (i = 0; i < argc; i++) { |
219 | register int len = strlen(argv[i]) + 1; | |
220 | nargv[i] = malloc(len); | |
03c05291 | 221 | memcpy(nargv[i], argv[i], len); |
28222705 | 222 | } |
d548a4e7 | 223 | arg_tmp->mr_flattened = (char *)NULL; |
224 | arg_tmp->mr_argl = (int *)NULL; | |
ed31e0d1 | 225 | |
226 | if (cp->last) { | |
227 | cp->last->next = tp; | |
228 | cp->last = tp; | |
229 | } else { | |
230 | cp->last = cp->first = tp; | |
231 | } | |
232 | ||
78849033 | 233 | reset_operation(op_tmp); |
d548a4e7 | 234 | initialize_operation(op_tmp, mr_start_send, (char *)arg_tmp, |
78849033 | 235 | (int (*)())NULL); |
236 | queue_operation(cp->con, CON_OUTPUT, op_tmp); | |
237 | } | |
238 | ||
de24f12d | 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; | |
de24f12d | 250 | char *ctime(); |
251 | ||
252 | for (i = 0; i < nclients; i++) { | |
253 | register client *cl = clients[i]; | |
254 | if (cl->clname) | |
255 | argv[0] = cl->clname; | |
256 | else argv[0] = "unauthenticated"; | |
257 | ||
258 | argv[1] = inet_ntoa(cl->haddr.sin_addr); | |
259 | argv[2] = buf; | |
260 | sprintf(buf, "port %d", ntohs(cl->haddr.sin_port)); | |
261 | argv[3] = ctime(&cl->last_time_used); | |
03c05291 | 262 | cp = strchr(argv[3], '\n'); |
de24f12d | 263 | if (cp) *cp = '\0'; |
264 | argv[4] = buf1; | |
265 | sprintf(buf1, "[#%d]", cl->id); | |
266 | (*callbk)(5, argv, callarg); | |
267 | } | |
268 | return 0; | |
269 | } | |
78849033 | 270 | |
a3cf6921 | 271 | do_retr(cl) |
de24f12d | 272 | register client *cl; |
a3cf6921 | 273 | { |
de24f12d | 274 | register char *queryname; |
275 | ||
d548a4e7 | 276 | cl->reply.mr_argc = 0; |
277 | cl->reply.mr_status = 0; | |
78543660 | 278 | row_count = 0; |
630e8323 | 279 | |
c473dda1 | 280 | if (cl->args->mr_argc < 1) { |
281 | cl->reply.mr_status = MR_ARGS; | |
282 | com_err(whoami, MR_ARGS, "got nameless query"); | |
283 | return; | |
284 | } | |
d548a4e7 | 285 | queryname = cl->args->mr_argv[0]; |
de24f12d | 286 | |
d548a4e7 | 287 | if (cl->args->mr_version_no == MR_VERSION_2) |
a36b5bd7 | 288 | newqueries++; |
289 | else | |
290 | oldqueries++; | |
291 | ||
de24f12d | 292 | if (strcmp(queryname, "_list_users") == 0) |
d548a4e7 | 293 | cl->reply.mr_status = list_users(retr_callback, (char *)cl); |
de24f12d | 294 | else { |
d548a4e7 | 295 | cl->reply.mr_status = |
296 | mr_process_query(cl, | |
c473dda1 | 297 | queryname, |
d548a4e7 | 298 | cl->args->mr_argc-1, |
299 | cl->args->mr_argv+1, | |
de24f12d | 300 | retr_callback, |
301 | (char *)cl); | |
302 | } | |
78543660 | 303 | if (row_count >= max_row_count) { |
304 | critical_alert("moirad", "attempted query %s with %d rows\n", | |
305 | queryname, row_count); | |
306 | } | |
307 | ||
630e8323 | 308 | if (log_flags & LOG_RES) |
309 | com_err(whoami, 0, "Query complete."); | |
a3cf6921 | 310 | } |
78849033 | 311 | |
3630192b | 312 | do_access(cl) |
313 | client *cl; | |
314 | { | |
c473dda1 | 315 | if (cl->args->mr_argc < 1) { |
316 | cl->reply.mr_status = MR_ARGS; | |
317 | com_err(whoami, MR_ARGS, "got nameless access"); | |
318 | return; | |
319 | } | |
d548a4e7 | 320 | cl->reply.mr_argc = 0; |
630e8323 | 321 | |
d548a4e7 | 322 | cl->reply.mr_status = |
323 | mr_check_access(cl, | |
324 | cl->args->mr_argv[0], | |
325 | cl->args->mr_argc-1, | |
326 | cl->args->mr_argv+1); | |
3630192b | 327 | |
328 | com_err(whoami, 0, "Access check complete."); | |
329 | } | |
8165c536 | 330 | |
a36b5bd7 | 331 | |
332 | /* trigger_dcm is also used as a followup routine to the | |
333 | * set_server_host_override query, hence the two dummy arguments. | |
334 | */ | |
335 | ||
8165c536 | 336 | struct query pseudo_query = { |
337 | "trigger_dcm", | |
338 | "tdcm", | |
339 | }; | |
340 | ||
a36b5bd7 | 341 | trigger_dcm(dummy0, dummy1, cl) |
342 | int dummy0, dummy1; | |
8165c536 | 343 | client *cl; |
344 | { | |
345 | register int pid; | |
185f76ce | 346 | char prog[128]; |
347 | ||
d548a4e7 | 348 | cl->reply.mr_argc = 0; |
8165c536 | 349 | |
d548a4e7 | 350 | if (cl->reply.mr_status = check_query_access(&pseudo_query, 0, cl) ) |
351 | return(cl->reply.mr_status); | |
8165c536 | 352 | |
185f76ce | 353 | sprintf(prog, "%s/startdcm", BIN_DIR); |
8165c536 | 354 | pid = vfork(); |
355 | switch (pid) { | |
356 | case 0: | |
185f76ce | 357 | execl(prog, "startdcm", 0); |
8165c536 | 358 | exit(1); |
359 | ||
360 | case -1: | |
d548a4e7 | 361 | cl->reply.mr_status = errno; |
a36b5bd7 | 362 | return(0); |
8165c536 | 363 | |
364 | default: | |
a36b5bd7 | 365 | return(0); |
8165c536 | 366 | } |
367 | } | |
368 | ||
57c08162 | 369 | |
370 | get_motd(cl) | |
371 | client *cl; | |
372 | { | |
9cad7c8f | 373 | int motd, len; |
57c08162 | 374 | char buffer[1024]; |
375 | char *arg[1]; | |
376 | ||
377 | arg[0] = buffer; | |
d548a4e7 | 378 | cl->reply.mr_status = 0; |
379 | motd = open(MOIRA_MOTD_FILE, 0, O_RDONLY); | |
9cad7c8f | 380 | if (motd < 0) return; |
381 | len = read(motd, buffer, sizeof(buffer) - 1); | |
382 | close(motd); | |
383 | buffer[len] = 0; | |
78543660 | 384 | row_count = 0; |
57c08162 | 385 | retr_callback(1, arg, cl); |
d548a4e7 | 386 | cl->reply.mr_status = 0; |
57c08162 | 387 | } |