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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> | |
98a7b0ee | 22 | #include <netinet/in.h> |
960b073b | 23 | #include <arpa/inet.h> |
a3cf6921 | 24 | #include <krb.h> |
78849033 | 25 | #include <errno.h> |
d548a4e7 | 26 | #include "mr_server.h" |
03c05291 | 27 | #include "query.h" |
a3cf6921 | 28 | extern char buf1[]; |
29 | extern int nclients; | |
30 | extern char *whoami; | |
8165c536 | 31 | extern int errno; |
a3cf6921 | 32 | |
33 | extern void clist_delete(), do_auth(), do_shutdown(); | |
34 | void do_call(); | |
03c05291 | 35 | extern int dbms_errno, mr_errcode; |
78543660 | 36 | static int row_count; |
37 | ||
38 | /* Put this in a variable so that we can patch it if necessary */ | |
50e114e1 | 39 | int max_row_count = 4096; |
a3cf6921 | 40 | |
41 | /* | |
42 | * Welcome to the (finite state) machine (highest level). | |
43 | */ | |
44 | void | |
45 | do_client(cp) | |
46 | client *cp; | |
47 | { | |
57c08162 | 48 | struct stat stbuf; |
49 | ||
ed31e0d1 | 50 | free_rtn_tuples(cp); |
a3cf6921 | 51 | if (OP_STATUS(cp->pending_op) == OP_CANCELLED) { |
a36b5bd7 | 52 | com_err(whoami, 0, "Closed connection (now %d client%s, %d new queries, %d old)", |
f17535a4 | 53 | nclients-1, |
a36b5bd7 | 54 | nclients!=2?"s":"", |
55 | newqueries, | |
56 | oldqueries); | |
a3cf6921 | 57 | clist_delete(cp); |
57c08162 | 58 | /* if we no longer have any clients, and we're supposed to |
59 | * go down, then go down now. | |
60 | */ | |
61 | if ((dormant == AWAKE) && (nclients == 0) && | |
d548a4e7 | 62 | (stat(MOIRA_MOTD_FILE, &stbuf) == 0)) { |
57c08162 | 63 | com_err(whoami, 0, "motd file exists, slumbertime"); |
64 | dormant = SLEEPY; | |
65 | } | |
a3cf6921 | 66 | return; |
67 | } | |
68 | switch (cp->action) { | |
69 | case CL_ACCEPT: | |
70 | case CL_SEND: | |
71 | /* Start recieving next request */ | |
d548a4e7 | 72 | initialize_operation(cp->pending_op, mr_start_recv, |
5dbd09a0 | 73 | (char *)&cp->args, (int (*)())NULL); |
a3cf6921 | 74 | queue_operation(cp->con, CON_INPUT, cp->pending_op); |
75 | cp->action = CL_RECEIVE; | |
76 | break; | |
77 | case CL_RECEIVE: | |
78 | /* Data is here. Process it & start it heading back */ | |
79 | do_call(cp); /* This may block for a while. */ | |
d548a4e7 | 80 | mr_destroy_reply(cp->args); |
de24f12d | 81 | cp->args = NULL; |
d548a4e7 | 82 | initialize_operation(cp->pending_op, mr_start_send, |
5dbd09a0 | 83 | (char *)&cp->reply, (int (*)())NULL); |
a3cf6921 | 84 | queue_operation(cp->con, CON_OUTPUT, cp->pending_op); |
85 | cp->action = CL_SEND; | |
86 | break; | |
87 | } | |
88 | } | |
89 | ||
a3cf6921 | 90 | char *procnames[] = { |
91 | "noop", | |
92 | "auth", | |
93 | "shutdown", | |
78849033 | 94 | "query", |
630e8323 | 95 | "access", |
57c08162 | 96 | "dcm", |
97 | "motd", | |
630e8323 | 98 | }; |
99 | ||
a3cf6921 | 100 | |
101 | void | |
102 | do_call(cl) | |
103 | client *cl; | |
104 | { | |
105 | int pn; | |
d548a4e7 | 106 | cl->reply.mr_argc = 0; |
107 | cl->reply.mr_status = 0; | |
108 | cl->reply.mr_version_no = cl->args->mr_version_no; | |
109 | if (((pn = cl->args->mr_procno) < 0) || | |
110 | (pn > MR_MAX_PROC)) { | |
a3cf6921 | 111 | com_err(whoami, 0, "procno out of range"); |
d548a4e7 | 112 | cl->reply.mr_status = MR_UNKNOWN_PROC; |
a3cf6921 | 113 | return; |
114 | } | |
630e8323 | 115 | if (log_flags & LOG_ARGS) |
d548a4e7 | 116 | log_args(procnames[pn], cl->args->mr_version_no, |
117 | cl->args->mr_argc, cl->args->mr_argv); | |
630e8323 | 118 | else if (log_flags & LOG_REQUESTS) |
f17535a4 | 119 | com_err(whoami, 0, "%s", procnames[pn]); |
a3cf6921 | 120 | |
57c08162 | 121 | if ((dormant == ASLEEP || dormant == GROGGY) && |
d548a4e7 | 122 | pn != MR_NOOP && pn != MR_MOTD) { |
123 | cl->reply.mr_status = MR_DOWN; | |
57c08162 | 124 | if (log_flags & LOG_RES) |
d548a4e7 | 125 | com_err(whoami, MR_DOWN, "(query refused)"); |
57c08162 | 126 | return; |
127 | } | |
128 | ||
4ce8321c | 129 | /* make sure this gets cleared before every operation */ |
03c05291 | 130 | dbms_errno = 0; |
4ce8321c | 131 | |
a3cf6921 | 132 | switch(pn) { |
d548a4e7 | 133 | case MR_NOOP: |
134 | cl->reply.mr_status = 0; | |
a3cf6921 | 135 | return; |
3630192b | 136 | |
d548a4e7 | 137 | case MR_AUTH: |
a3cf6921 | 138 | do_auth(cl); |
139 | return; | |
78849033 | 140 | |
d548a4e7 | 141 | case MR_QUERY: |
a3cf6921 | 142 | do_retr(cl); |
143 | return; | |
a3cf6921 | 144 | |
d548a4e7 | 145 | case MR_ACCESS: |
3630192b | 146 | do_access(cl); |
147 | return; | |
148 | ||
d548a4e7 | 149 | case MR_SHUTDOWN: |
a3cf6921 | 150 | do_shutdown(cl); |
151 | return; | |
8165c536 | 152 | |
d548a4e7 | 153 | case MR_DO_UPDATE: |
a36b5bd7 | 154 | trigger_dcm(0, 0, cl); |
8165c536 | 155 | return; |
57c08162 | 156 | |
d548a4e7 | 157 | case MR_MOTD: |
57c08162 | 158 | get_motd(cl); |
159 | return; | |
a3cf6921 | 160 | } |
161 | } | |
162 | ||
ed31e0d1 | 163 | free_rtn_tuples(cp) |
164 | client *cp; | |
165 | { | |
166 | register returned_tuples *temp; | |
167 | for (temp=cp->first; temp && OP_DONE(temp->op); ) { | |
168 | register returned_tuples *t1=temp; | |
169 | temp = t1->next; | |
170 | if (t1 == cp->last) cp->last = NULL; | |
28222705 | 171 | |
d548a4e7 | 172 | mr_destroy_reply(t1->retval); |
ed31e0d1 | 173 | delete_operation(t1->op); |
174 | free(t1); | |
175 | } | |
176 | cp->first = temp; | |
177 | } | |
178 | ||
78849033 | 179 | retr_callback(argc, argv, p_cp) |
28222705 | 180 | register int argc; |
181 | register char **argv; | |
78849033 | 182 | char *p_cp; |
183 | { | |
184 | register client *cp = (client *)p_cp; | |
78543660 | 185 | mr_params *arg_tmp; |
186 | returned_tuples *tp; | |
187 | OPERATION op_tmp; | |
188 | register char **nargv; | |
189 | register int i; | |
190 | ||
191 | if (row_count++ >= max_row_count) { | |
03c05291 | 192 | dbms_errno = mr_errcode = MR_NO_MEM; |
78543660 | 193 | return; |
194 | } | |
195 | ||
78849033 | 196 | /* |
197 | * This takes too much advantage of the fact that | |
198 | * serialization of the data happens during the queue operation. | |
199 | */ | |
78543660 | 200 | arg_tmp = (mr_params *)db_alloc(sizeof(mr_params)); |
201 | tp = (returned_tuples *)db_alloc(sizeof(returned_tuples)); | |
202 | nargv = (char **)malloc(argc * sizeof(char *)); | |
ed31e0d1 | 203 | |
78543660 | 204 | op_tmp = create_operation(); |
78849033 | 205 | |
d548a4e7 | 206 | if (mr_trim_args(argc, argv) == MR_NO_MEM) { |
207 | com_err(whoami, MR_NO_MEM, "while trimming args"); | |
a36b5bd7 | 208 | } |
630e8323 | 209 | if (log_flags & LOG_RESP) |
d548a4e7 | 210 | log_args("return: ", cp->args->mr_version_no, argc, argv); |
630e8323 | 211 | |
ed31e0d1 | 212 | tp->op = op_tmp; |
213 | tp->retval = arg_tmp; | |
214 | tp->next = NULL; | |
78849033 | 215 | |
d548a4e7 | 216 | arg_tmp->mr_status = MR_MORE_DATA; |
217 | arg_tmp->mr_version_no = cp->args->mr_version_no; | |
218 | arg_tmp->mr_argc = argc; | |
219 | arg_tmp->mr_argv = nargv; | |
28222705 | 220 | for (i = 0; i < argc; i++) { |
221 | register int len = strlen(argv[i]) + 1; | |
222 | nargv[i] = malloc(len); | |
03c05291 | 223 | memcpy(nargv[i], argv[i], len); |
28222705 | 224 | } |
d548a4e7 | 225 | arg_tmp->mr_flattened = (char *)NULL; |
226 | arg_tmp->mr_argl = (int *)NULL; | |
ed31e0d1 | 227 | |
228 | if (cp->last) { | |
229 | cp->last->next = tp; | |
230 | cp->last = tp; | |
231 | } else { | |
232 | cp->last = cp->first = tp; | |
233 | } | |
234 | ||
78849033 | 235 | reset_operation(op_tmp); |
d548a4e7 | 236 | initialize_operation(op_tmp, mr_start_send, (char *)arg_tmp, |
78849033 | 237 | (int (*)())NULL); |
238 | queue_operation(cp->con, CON_OUTPUT, op_tmp); | |
239 | } | |
240 | ||
de24f12d | 241 | list_users(callbk, callarg) |
242 | int (*callbk)(); | |
243 | char *callarg; | |
244 | { | |
245 | char *argv[6]; | |
246 | char buf[30]; | |
247 | char buf1[30]; | |
248 | int i; | |
249 | extern client **clients; | |
de24f12d | 250 | char *cp; |
de24f12d | 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); | |
03c05291 | 263 | cp = strchr(argv[3], '\n'); |
de24f12d | 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 | } | |
78849033 | 271 | |
a3cf6921 | 272 | do_retr(cl) |
de24f12d | 273 | register client *cl; |
a3cf6921 | 274 | { |
de24f12d | 275 | register char *queryname; |
276 | ||
d548a4e7 | 277 | cl->reply.mr_argc = 0; |
278 | cl->reply.mr_status = 0; | |
78543660 | 279 | row_count = 0; |
630e8323 | 280 | |
c473dda1 | 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 | } | |
d548a4e7 | 286 | queryname = cl->args->mr_argv[0]; |
de24f12d | 287 | |
d548a4e7 | 288 | if (cl->args->mr_version_no == MR_VERSION_2) |
a36b5bd7 | 289 | newqueries++; |
290 | else | |
291 | oldqueries++; | |
292 | ||
de24f12d | 293 | if (strcmp(queryname, "_list_users") == 0) |
d548a4e7 | 294 | cl->reply.mr_status = list_users(retr_callback, (char *)cl); |
de24f12d | 295 | else { |
d548a4e7 | 296 | cl->reply.mr_status = |
297 | mr_process_query(cl, | |
c473dda1 | 298 | queryname, |
d548a4e7 | 299 | cl->args->mr_argc-1, |
300 | cl->args->mr_argv+1, | |
de24f12d | 301 | retr_callback, |
302 | (char *)cl); | |
303 | } | |
78543660 | 304 | if (row_count >= max_row_count) { |
305 | critical_alert("moirad", "attempted query %s with %d rows\n", | |
306 | queryname, row_count); | |
307 | } | |
308 | ||
630e8323 | 309 | if (log_flags & LOG_RES) |
310 | com_err(whoami, 0, "Query complete."); | |
a3cf6921 | 311 | } |
78849033 | 312 | |
3630192b | 313 | do_access(cl) |
314 | client *cl; | |
315 | { | |
c473dda1 | 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 | } | |
d548a4e7 | 321 | cl->reply.mr_argc = 0; |
630e8323 | 322 | |
d548a4e7 | 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); | |
3630192b | 328 | |
329 | com_err(whoami, 0, "Access check complete."); | |
330 | } | |
8165c536 | 331 | |
a36b5bd7 | 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 | ||
8165c536 | 337 | struct query pseudo_query = { |
338 | "trigger_dcm", | |
339 | "tdcm", | |
340 | }; | |
341 | ||
a36b5bd7 | 342 | trigger_dcm(dummy0, dummy1, cl) |
343 | int dummy0, dummy1; | |
8165c536 | 344 | client *cl; |
345 | { | |
346 | register int pid; | |
185f76ce | 347 | char prog[128]; |
348 | ||
d548a4e7 | 349 | cl->reply.mr_argc = 0; |
8165c536 | 350 | |
d548a4e7 | 351 | if (cl->reply.mr_status = check_query_access(&pseudo_query, 0, cl) ) |
352 | return(cl->reply.mr_status); | |
8165c536 | 353 | |
185f76ce | 354 | sprintf(prog, "%s/startdcm", BIN_DIR); |
8165c536 | 355 | pid = vfork(); |
356 | switch (pid) { | |
357 | case 0: | |
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 | } |