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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; | |
28222705 | 27 | extern char *malloc(); |
8165c536 | 28 | extern int errno; |
a3cf6921 | 29 | |
30 | extern void clist_delete(), do_auth(), do_shutdown(); | |
31 | void do_call(); | |
32 | ||
33 | /* | |
34 | * Welcome to the (finite state) machine (highest level). | |
35 | */ | |
36 | void | |
37 | do_client(cp) | |
38 | client *cp; | |
39 | { | |
57c08162 | 40 | struct stat stbuf; |
41 | ||
ed31e0d1 | 42 | free_rtn_tuples(cp); |
a3cf6921 | 43 | if (OP_STATUS(cp->pending_op) == OP_CANCELLED) { |
a36b5bd7 | 44 | com_err(whoami, 0, "Closed connection (now %d client%s, %d new queries, %d old)", |
f17535a4 | 45 | nclients-1, |
a36b5bd7 | 46 | nclients!=2?"s":"", |
47 | newqueries, | |
48 | oldqueries); | |
a3cf6921 | 49 | clist_delete(cp); |
57c08162 | 50 | /* if we no longer have any clients, and we're supposed to |
51 | * go down, then go down now. | |
52 | */ | |
53 | if ((dormant == AWAKE) && (nclients == 0) && | |
d548a4e7 | 54 | (stat(MOIRA_MOTD_FILE, &stbuf) == 0)) { |
57c08162 | 55 | com_err(whoami, 0, "motd file exists, slumbertime"); |
56 | dormant = SLEEPY; | |
57 | } | |
a3cf6921 | 58 | return; |
59 | } | |
60 | switch (cp->action) { | |
61 | case CL_ACCEPT: | |
62 | case CL_SEND: | |
63 | /* Start recieving next request */ | |
d548a4e7 | 64 | initialize_operation(cp->pending_op, mr_start_recv, |
5dbd09a0 | 65 | (char *)&cp->args, (int (*)())NULL); |
a3cf6921 | 66 | queue_operation(cp->con, CON_INPUT, cp->pending_op); |
67 | cp->action = CL_RECEIVE; | |
68 | break; | |
69 | case CL_RECEIVE: | |
70 | /* Data is here. Process it & start it heading back */ | |
71 | do_call(cp); /* This may block for a while. */ | |
d548a4e7 | 72 | mr_destroy_reply(cp->args); |
de24f12d | 73 | cp->args = NULL; |
d548a4e7 | 74 | initialize_operation(cp->pending_op, mr_start_send, |
5dbd09a0 | 75 | (char *)&cp->reply, (int (*)())NULL); |
a3cf6921 | 76 | queue_operation(cp->con, CON_OUTPUT, cp->pending_op); |
77 | cp->action = CL_SEND; | |
78 | break; | |
79 | } | |
80 | } | |
81 | ||
a3cf6921 | 82 | char *procnames[] = { |
83 | "noop", | |
84 | "auth", | |
85 | "shutdown", | |
78849033 | 86 | "query", |
630e8323 | 87 | "access", |
57c08162 | 88 | "dcm", |
89 | "motd", | |
630e8323 | 90 | }; |
91 | ||
a3cf6921 | 92 | |
93 | void | |
94 | do_call(cl) | |
95 | client *cl; | |
96 | { | |
97 | int pn; | |
4ce8321c | 98 | extern int ingres_errno; |
d548a4e7 | 99 | cl->reply.mr_argc = 0; |
100 | cl->reply.mr_status = 0; | |
101 | cl->reply.mr_version_no = cl->args->mr_version_no; | |
102 | if (((pn = cl->args->mr_procno) < 0) || | |
103 | (pn > MR_MAX_PROC)) { | |
a3cf6921 | 104 | com_err(whoami, 0, "procno out of range"); |
d548a4e7 | 105 | cl->reply.mr_status = MR_UNKNOWN_PROC; |
a3cf6921 | 106 | return; |
107 | } | |
630e8323 | 108 | if (log_flags & LOG_ARGS) |
d548a4e7 | 109 | log_args(procnames[pn], cl->args->mr_version_no, |
110 | cl->args->mr_argc, cl->args->mr_argv); | |
630e8323 | 111 | else if (log_flags & LOG_REQUESTS) |
f17535a4 | 112 | com_err(whoami, 0, "%s", procnames[pn]); |
a3cf6921 | 113 | |
57c08162 | 114 | if ((dormant == ASLEEP || dormant == GROGGY) && |
d548a4e7 | 115 | pn != MR_NOOP && pn != MR_MOTD) { |
116 | cl->reply.mr_status = MR_DOWN; | |
57c08162 | 117 | if (log_flags & LOG_RES) |
d548a4e7 | 118 | com_err(whoami, MR_DOWN, "(query refused)"); |
57c08162 | 119 | return; |
120 | } | |
121 | ||
4ce8321c | 122 | /* make sure this gets cleared before every operation */ |
123 | ingres_errno = 0; | |
124 | ||
a3cf6921 | 125 | switch(pn) { |
d548a4e7 | 126 | case MR_NOOP: |
127 | cl->reply.mr_status = 0; | |
a3cf6921 | 128 | return; |
3630192b | 129 | |
d548a4e7 | 130 | case MR_AUTH: |
a3cf6921 | 131 | do_auth(cl); |
132 | return; | |
78849033 | 133 | |
d548a4e7 | 134 | case MR_QUERY: |
a3cf6921 | 135 | do_retr(cl); |
136 | return; | |
a3cf6921 | 137 | |
d548a4e7 | 138 | case MR_ACCESS: |
3630192b | 139 | do_access(cl); |
140 | return; | |
141 | ||
d548a4e7 | 142 | case MR_SHUTDOWN: |
a3cf6921 | 143 | do_shutdown(cl); |
144 | return; | |
8165c536 | 145 | |
d548a4e7 | 146 | case MR_DO_UPDATE: |
a36b5bd7 | 147 | trigger_dcm(0, 0, cl); |
8165c536 | 148 | return; |
57c08162 | 149 | |
d548a4e7 | 150 | case MR_MOTD: |
57c08162 | 151 | get_motd(cl); |
152 | return; | |
a3cf6921 | 153 | } |
154 | } | |
155 | ||
ed31e0d1 | 156 | free_rtn_tuples(cp) |
157 | client *cp; | |
158 | { | |
159 | register returned_tuples *temp; | |
160 | for (temp=cp->first; temp && OP_DONE(temp->op); ) { | |
161 | register returned_tuples *t1=temp; | |
162 | temp = t1->next; | |
163 | if (t1 == cp->last) cp->last = NULL; | |
28222705 | 164 | |
d548a4e7 | 165 | mr_destroy_reply(t1->retval); |
ed31e0d1 | 166 | delete_operation(t1->op); |
167 | free(t1); | |
168 | } | |
169 | cp->first = temp; | |
170 | } | |
171 | ||
78849033 | 172 | retr_callback(argc, argv, p_cp) |
28222705 | 173 | register int argc; |
174 | register char **argv; | |
78849033 | 175 | char *p_cp; |
176 | { | |
177 | register client *cp = (client *)p_cp; | |
78849033 | 178 | /* |
179 | * This takes too much advantage of the fact that | |
180 | * serialization of the data happens during the queue operation. | |
181 | */ | |
d548a4e7 | 182 | mr_params *arg_tmp = (mr_params *)db_alloc(sizeof(mr_params)); |
ed31e0d1 | 183 | returned_tuples *tp = (returned_tuples *) |
184 | db_alloc(sizeof(returned_tuples)); | |
28222705 | 185 | register char **nargv = (char **)malloc(argc * sizeof(char *)); |
186 | register int i; | |
ed31e0d1 | 187 | |
78849033 | 188 | OPERATION op_tmp = create_operation(); |
78849033 | 189 | |
d548a4e7 | 190 | if (mr_trim_args(argc, argv) == MR_NO_MEM) { |
191 | com_err(whoami, MR_NO_MEM, "while trimming args"); | |
a36b5bd7 | 192 | } |
630e8323 | 193 | if (log_flags & LOG_RESP) |
d548a4e7 | 194 | log_args("return: ", cp->args->mr_version_no, argc, argv); |
630e8323 | 195 | |
ed31e0d1 | 196 | tp->op = op_tmp; |
197 | tp->retval = arg_tmp; | |
198 | tp->next = NULL; | |
78849033 | 199 | |
d548a4e7 | 200 | arg_tmp->mr_status = MR_MORE_DATA; |
201 | arg_tmp->mr_version_no = cp->args->mr_version_no; | |
202 | arg_tmp->mr_argc = argc; | |
203 | arg_tmp->mr_argv = nargv; | |
28222705 | 204 | for (i = 0; i < argc; i++) { |
205 | register int len = strlen(argv[i]) + 1; | |
206 | nargv[i] = malloc(len); | |
207 | bcopy(argv[i], nargv[i], len); | |
208 | } | |
d548a4e7 | 209 | arg_tmp->mr_flattened = (char *)NULL; |
210 | arg_tmp->mr_argl = (int *)NULL; | |
ed31e0d1 | 211 | |
212 | if (cp->last) { | |
213 | cp->last->next = tp; | |
214 | cp->last = tp; | |
215 | } else { | |
216 | cp->last = cp->first = tp; | |
217 | } | |
218 | ||
78849033 | 219 | reset_operation(op_tmp); |
d548a4e7 | 220 | initialize_operation(op_tmp, mr_start_send, (char *)arg_tmp, |
78849033 | 221 | (int (*)())NULL); |
222 | queue_operation(cp->con, CON_OUTPUT, op_tmp); | |
223 | } | |
224 | ||
de24f12d | 225 | list_users(callbk, callarg) |
226 | int (*callbk)(); | |
227 | char *callarg; | |
228 | { | |
229 | char *argv[6]; | |
230 | char buf[30]; | |
231 | char buf1[30]; | |
232 | int i; | |
233 | extern client **clients; | |
234 | extern char *inet_ntoa(); | |
235 | char *cp; | |
236 | char *index(); | |
237 | char *ctime(); | |
238 | ||
239 | for (i = 0; i < nclients; i++) { | |
240 | register client *cl = clients[i]; | |
241 | if (cl->clname) | |
242 | argv[0] = cl->clname; | |
243 | else argv[0] = "unauthenticated"; | |
244 | ||
245 | argv[1] = inet_ntoa(cl->haddr.sin_addr); | |
246 | argv[2] = buf; | |
247 | sprintf(buf, "port %d", ntohs(cl->haddr.sin_port)); | |
248 | argv[3] = ctime(&cl->last_time_used); | |
249 | cp = index(argv[3], '\n'); | |
250 | if (cp) *cp = '\0'; | |
251 | argv[4] = buf1; | |
252 | sprintf(buf1, "[#%d]", cl->id); | |
253 | (*callbk)(5, argv, callarg); | |
254 | } | |
255 | return 0; | |
256 | } | |
78849033 | 257 | |
a3cf6921 | 258 | do_retr(cl) |
de24f12d | 259 | register client *cl; |
a3cf6921 | 260 | { |
de24f12d | 261 | register char *queryname; |
262 | ||
d548a4e7 | 263 | cl->reply.mr_argc = 0; |
264 | cl->reply.mr_status = 0; | |
630e8323 | 265 | |
d548a4e7 | 266 | queryname = cl->args->mr_argv[0]; |
de24f12d | 267 | |
d548a4e7 | 268 | if (cl->args->mr_version_no == MR_VERSION_2) |
a36b5bd7 | 269 | newqueries++; |
270 | else | |
271 | oldqueries++; | |
272 | ||
de24f12d | 273 | if (strcmp(queryname, "_list_users") == 0) |
d548a4e7 | 274 | cl->reply.mr_status = list_users(retr_callback, (char *)cl); |
de24f12d | 275 | else { |
d548a4e7 | 276 | cl->reply.mr_status = |
277 | mr_process_query(cl, | |
278 | cl->args->mr_argv[0], | |
279 | cl->args->mr_argc-1, | |
280 | cl->args->mr_argv+1, | |
de24f12d | 281 | retr_callback, |
282 | (char *)cl); | |
283 | } | |
630e8323 | 284 | if (log_flags & LOG_RES) |
285 | com_err(whoami, 0, "Query complete."); | |
a3cf6921 | 286 | } |
78849033 | 287 | |
3630192b | 288 | do_access(cl) |
289 | client *cl; | |
290 | { | |
d548a4e7 | 291 | cl->reply.mr_argc = 0; |
630e8323 | 292 | |
d548a4e7 | 293 | cl->reply.mr_status = |
294 | mr_check_access(cl, | |
295 | cl->args->mr_argv[0], | |
296 | cl->args->mr_argc-1, | |
297 | cl->args->mr_argv+1); | |
3630192b | 298 | |
299 | com_err(whoami, 0, "Access check complete."); | |
300 | } | |
8165c536 | 301 | |
a36b5bd7 | 302 | |
303 | /* trigger_dcm is also used as a followup routine to the | |
304 | * set_server_host_override query, hence the two dummy arguments. | |
305 | */ | |
306 | ||
8165c536 | 307 | struct query pseudo_query = { |
308 | "trigger_dcm", | |
309 | "tdcm", | |
310 | }; | |
311 | ||
a36b5bd7 | 312 | trigger_dcm(dummy0, dummy1, cl) |
313 | int dummy0, dummy1; | |
8165c536 | 314 | client *cl; |
315 | { | |
316 | register int pid; | |
185f76ce | 317 | char prog[128]; |
318 | ||
d548a4e7 | 319 | cl->reply.mr_argc = 0; |
8165c536 | 320 | |
d548a4e7 | 321 | if (cl->reply.mr_status = check_query_access(&pseudo_query, 0, cl) ) |
322 | return(cl->reply.mr_status); | |
8165c536 | 323 | |
185f76ce | 324 | sprintf(prog, "%s/startdcm", BIN_DIR); |
8165c536 | 325 | pid = vfork(); |
326 | switch (pid) { | |
327 | case 0: | |
9ddf3daa | 328 | for (dummy0 = getdtablesize() - 1; dummy0 > 2; dummy0--) |
329 | close(dummy0); | |
185f76ce | 330 | execl(prog, "startdcm", 0); |
8165c536 | 331 | exit(1); |
332 | ||
333 | case -1: | |
d548a4e7 | 334 | cl->reply.mr_status = errno; |
a36b5bd7 | 335 | return(0); |
8165c536 | 336 | |
337 | default: | |
a36b5bd7 | 338 | return(0); |
8165c536 | 339 | } |
340 | } | |
341 | ||
57c08162 | 342 | |
343 | get_motd(cl) | |
344 | client *cl; | |
345 | { | |
9cad7c8f | 346 | int motd, len; |
57c08162 | 347 | char buffer[1024]; |
348 | char *arg[1]; | |
349 | ||
350 | arg[0] = buffer; | |
d548a4e7 | 351 | cl->reply.mr_status = 0; |
352 | motd = open(MOIRA_MOTD_FILE, 0, O_RDONLY); | |
9cad7c8f | 353 | if (motd < 0) return; |
354 | len = read(motd, buffer, sizeof(buffer) - 1); | |
355 | close(motd); | |
356 | buffer[len] = 0; | |
57c08162 | 357 | retr_callback(1, arg, cl); |
d548a4e7 | 358 | cl->reply.mr_status = 0; |
57c08162 | 359 | } |