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1 | /* | |
2 | * $Source$ | |
3 | * $Author$ | |
4 | * $Header$ | |
5 | * | |
6 | * Copyright (C) 1987 by the Massachusetts Institute of Technology | |
7 | * | |
8 | * $Log$ | |
9 | * Revision 1.11 1987-08-19 22:03:52 wesommer | |
10 | * Added the trigger_dcm function, which fires off a DCM to do the | |
11 | * update. | |
12 | * | |
13 | * Revision 1.10 87/08/19 18:39:04 wesommer | |
14 | * Added list_users query. | |
15 | * | |
16 | * Revision 1.9 87/08/04 02:41:22 wesommer | |
17 | * Clean up messages. | |
18 | * | |
19 | * Revision 1.8 87/07/16 15:43:19 wesommer | |
20 | * Fixed bug where the argv was not copied to private storage | |
21 | * (it got changed out from under us before it got sent..). | |
22 | * | |
23 | * Revision 1.7 87/07/14 00:39:01 wesommer | |
24 | * Rearranged loggin. | |
25 | * | |
26 | * Revision 1.6 87/06/30 20:04:43 wesommer | |
27 | * Free returned tuples when possible. | |
28 | * | |
29 | * Revision 1.5 87/06/26 10:55:53 wesommer | |
30 | * Added sms_access, now paiys attention to return code from | |
31 | * sms_process_query, sms_check_access. | |
32 | * | |
33 | * Revision 1.4 87/06/21 16:42:00 wesommer | |
34 | * Performance work, rearrangement of include files. | |
35 | * | |
36 | * Revision 1.3 87/06/04 01:35:01 wesommer | |
37 | * Added a working query request handler. | |
38 | * | |
39 | * Revision 1.2 87/06/03 16:07:50 wesommer | |
40 | * Fixes for lint. | |
41 | * | |
42 | * Revision 1.1 87/06/02 20:07:10 wesommer | |
43 | * Initial revision | |
44 | * | |
45 | */ | |
46 | ||
47 | #ifndef lint | |
48 | static char *rcsid_sms_scall_c = "$Header$"; | |
49 | #endif lint | |
50 | ||
51 | #include <krb.h> | |
52 | #include <errno.h> | |
53 | #include "query.h" | |
54 | #include "sms_server.h" | |
55 | extern char buf1[]; | |
56 | extern int nclients; | |
57 | extern char *whoami; | |
58 | extern char *malloc(); | |
59 | extern int errno; | |
60 | ||
61 | extern void clist_delete(), do_auth(), do_shutdown(); | |
62 | void do_call(); | |
63 | ||
64 | /* | |
65 | * Welcome to the (finite state) machine (highest level). | |
66 | */ | |
67 | void | |
68 | do_client(cp) | |
69 | client *cp; | |
70 | { | |
71 | free_rtn_tuples(cp); | |
72 | if (OP_STATUS(cp->pending_op) == OP_CANCELLED) { | |
73 | com_err(whoami, 0, "Closed connection (now %d client%s)", | |
74 | nclients-1, | |
75 | nclients!=2?"s":""); | |
76 | clist_delete(cp); | |
77 | return; | |
78 | } | |
79 | switch (cp->action) { | |
80 | case CL_ACCEPT: | |
81 | case CL_SEND: | |
82 | /* Start recieving next request */ | |
83 | initialize_operation(cp->pending_op, sms_start_recv, | |
84 | (char *)&cp->args, (int (*)())NULL); | |
85 | queue_operation(cp->con, CON_INPUT, cp->pending_op); | |
86 | cp->action = CL_RECEIVE; | |
87 | break; | |
88 | case CL_RECEIVE: | |
89 | /* Data is here. Process it & start it heading back */ | |
90 | do_call(cp); /* This may block for a while. */ | |
91 | sms_destroy_reply(cp->args); | |
92 | cp->args = NULL; | |
93 | initialize_operation(cp->pending_op, sms_start_send, | |
94 | (char *)&cp->reply, (int (*)())NULL); | |
95 | queue_operation(cp->con, CON_OUTPUT, cp->pending_op); | |
96 | cp->action = CL_SEND; | |
97 | break; | |
98 | } | |
99 | } | |
100 | ||
101 | char *procnames[] = { | |
102 | "noop", | |
103 | "auth", | |
104 | "shutdown", | |
105 | "query", | |
106 | "access", | |
107 | }; | |
108 | ||
109 | ||
110 | void | |
111 | do_call(cl) | |
112 | client *cl; | |
113 | { | |
114 | int pn; | |
115 | cl->reply.sms_argc = 0; | |
116 | cl->reply.sms_status = 0; | |
117 | if (((pn = cl->args->sms_procno) < 0) || | |
118 | (pn > SMS_MAX_PROC)) { | |
119 | com_err(whoami, 0, "procno out of range"); | |
120 | cl->reply.sms_status = SMS_UNKNOWN_PROC; | |
121 | return; | |
122 | } | |
123 | if (log_flags & LOG_ARGS) | |
124 | log_args(procnames[pn], cl->args->sms_argc, | |
125 | cl->args->sms_argv); | |
126 | else if (log_flags & LOG_REQUESTS) | |
127 | com_err(whoami, 0, "%s", procnames[pn]); | |
128 | ||
129 | switch(pn) { | |
130 | case SMS_NOOP: | |
131 | cl->reply.sms_status = 0; | |
132 | return; | |
133 | ||
134 | case SMS_AUTH: | |
135 | do_auth(cl); | |
136 | return; | |
137 | ||
138 | case SMS_QUERY: | |
139 | do_retr(cl); | |
140 | return; | |
141 | ||
142 | case SMS_ACCESS: | |
143 | do_access(cl); | |
144 | return; | |
145 | ||
146 | case SMS_SHUTDOWN: | |
147 | do_shutdown(cl); | |
148 | return; | |
149 | ||
150 | case SMS_DO_UPDATE: | |
151 | trigger_dcm(cl); | |
152 | return; | |
153 | } | |
154 | } | |
155 | ||
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; | |
164 | ||
165 | sms_destroy_reply(t1->retval); | |
166 | #ifdef notdef | |
167 | if (t1->retval) { | |
168 | register sms_params *p = t1->retval; | |
169 | if (p->sms_flattened) | |
170 | free(p->sms_flattened); | |
171 | if (p->sms_argl) | |
172 | free(p->sms_argl); | |
173 | free(p); | |
174 | } | |
175 | #endif notdef | |
176 | delete_operation(t1->op); | |
177 | free(t1); | |
178 | } | |
179 | cp->first = temp; | |
180 | } | |
181 | ||
182 | retr_callback(argc, argv, p_cp) | |
183 | register int argc; | |
184 | register char **argv; | |
185 | char *p_cp; | |
186 | { | |
187 | register client *cp = (client *)p_cp; | |
188 | /* | |
189 | * This takes too much advantage of the fact that | |
190 | * serialization of the data happens during the queue operation. | |
191 | */ | |
192 | sms_params *arg_tmp = (sms_params *)db_alloc(sizeof(sms_params)); | |
193 | returned_tuples *tp = (returned_tuples *) | |
194 | db_alloc(sizeof(returned_tuples)); | |
195 | register char **nargv = (char **)malloc(argc * sizeof(char *)); | |
196 | register int i; | |
197 | ||
198 | OPERATION op_tmp = create_operation(); | |
199 | ||
200 | if (log_flags & LOG_RESP) | |
201 | log_args("return: ", argc, argv); | |
202 | ||
203 | tp->op = op_tmp; | |
204 | tp->retval = arg_tmp; | |
205 | tp->next = NULL; | |
206 | ||
207 | arg_tmp->sms_status = SMS_MORE_DATA; | |
208 | arg_tmp->sms_argc = argc; | |
209 | arg_tmp->sms_argv = nargv; | |
210 | for (i = 0; i < argc; i++) { | |
211 | register int len = strlen(argv[i]) + 1; | |
212 | nargv[i] = malloc(len); | |
213 | bcopy(argv[i], nargv[i], len); | |
214 | } | |
215 | arg_tmp->sms_flattened = (char *)NULL; | |
216 | arg_tmp->sms_argl = (int *)NULL; | |
217 | ||
218 | if (cp->last) { | |
219 | cp->last->next = tp; | |
220 | cp->last = tp; | |
221 | } else { | |
222 | cp->last = cp->first = tp; | |
223 | } | |
224 | ||
225 | reset_operation(op_tmp); | |
226 | initialize_operation(op_tmp, sms_start_send, (char *)arg_tmp, | |
227 | (int (*)())NULL); | |
228 | queue_operation(cp->con, CON_OUTPUT, op_tmp); | |
229 | } | |
230 | ||
231 | list_users(callbk, callarg) | |
232 | int (*callbk)(); | |
233 | char *callarg; | |
234 | { | |
235 | char *argv[6]; | |
236 | char buf[30]; | |
237 | char buf1[30]; | |
238 | int i; | |
239 | extern client **clients; | |
240 | extern char *inet_ntoa(); | |
241 | char *cp; | |
242 | char *index(); | |
243 | char *ctime(); | |
244 | ||
245 | for (i = 0; i < nclients; i++) { | |
246 | register client *cl = clients[i]; | |
247 | if (cl->clname) | |
248 | argv[0] = cl->clname; | |
249 | else argv[0] = "unauthenticated"; | |
250 | ||
251 | argv[1] = inet_ntoa(cl->haddr.sin_addr); | |
252 | argv[2] = buf; | |
253 | sprintf(buf, "port %d", ntohs(cl->haddr.sin_port)); | |
254 | argv[3] = ctime(&cl->last_time_used); | |
255 | cp = index(argv[3], '\n'); | |
256 | if (cp) *cp = '\0'; | |
257 | argv[4] = buf1; | |
258 | sprintf(buf1, "[#%d]", cl->id); | |
259 | (*callbk)(5, argv, callarg); | |
260 | } | |
261 | return 0; | |
262 | } | |
263 | ||
264 | do_retr(cl) | |
265 | register client *cl; | |
266 | { | |
267 | register char *queryname; | |
268 | ||
269 | cl->reply.sms_argc = 0; | |
270 | cl->reply.sms_status = 0; | |
271 | ||
272 | queryname = cl->args->sms_argv[0]; | |
273 | ||
274 | if (strcmp(queryname, "_list_users") == 0) | |
275 | cl->reply.sms_status = list_users(retr_callback, (char *)cl); | |
276 | else { | |
277 | cl->reply.sms_status = | |
278 | sms_process_query(cl, | |
279 | cl->args->sms_argv[0], | |
280 | cl->args->sms_argc-1, | |
281 | cl->args->sms_argv+1, | |
282 | retr_callback, | |
283 | (char *)cl); | |
284 | } | |
285 | if (log_flags & LOG_RES) | |
286 | com_err(whoami, 0, "Query complete."); | |
287 | } | |
288 | ||
289 | do_access(cl) | |
290 | client *cl; | |
291 | { | |
292 | cl->reply.sms_argc = 0; | |
293 | ||
294 | cl->reply.sms_status = | |
295 | sms_check_access(cl, | |
296 | cl->args->sms_argv[0], | |
297 | cl->args->sms_argc-1, | |
298 | cl->args->sms_argv+1); | |
299 | ||
300 | com_err(whoami, 0, "Access check complete."); | |
301 | } | |
302 | ||
303 | struct query pseudo_query = { | |
304 | "trigger_dcm", | |
305 | "tdcm", | |
306 | }; | |
307 | ||
308 | trigger_dcm(cl) | |
309 | client *cl; | |
310 | { | |
311 | register int pid; | |
312 | ||
313 | cl->reply.sms_argc = 0; | |
314 | ||
315 | if (cl->reply.sms_status = check_query_access(&pseudo_query, 0, cl) ) | |
316 | return; | |
317 | ||
318 | pid = vfork(); | |
319 | switch (pid) { | |
320 | case 0: | |
321 | execl("/u1/sms/bin/dcm", "dcm", 0); | |
322 | exit(1); | |
323 | ||
324 | case -1: | |
325 | cl->reply.sms_status = errno; | |
326 | return; | |
327 | ||
328 | default: | |
329 | return; | |
330 | } | |
331 | } | |
332 |