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1 | /* | |
2 | * $Source$ | |
3 | * $Author$ | |
4 | * $Header$ | |
5 | * | |
6 | * Copyright (C) 1987 by the Massachusetts Institute of Technology | |
7 | * For copying and distribution information, please see the file | |
8 | * <mit-copyright.h>. | |
9 | * | |
10 | */ | |
11 | ||
12 | #ifndef lint | |
13 | static char *rcsid_sms_scall_c = "$Header$"; | |
14 | #endif lint | |
15 | ||
16 | #include <mit-copyright.h> | |
17 | #include <krb.h> | |
18 | #include <errno.h> | |
19 | #include "query.h" | |
20 | #include "sms_server.h" | |
21 | extern char buf1[]; | |
22 | extern int nclients; | |
23 | extern char *whoami; | |
24 | extern char *malloc(); | |
25 | extern int errno; | |
26 | ||
27 | extern void clist_delete(), do_auth(), do_shutdown(); | |
28 | void do_call(); | |
29 | ||
30 | /* | |
31 | * Welcome to the (finite state) machine (highest level). | |
32 | */ | |
33 | void | |
34 | do_client(cp) | |
35 | client *cp; | |
36 | { | |
37 | free_rtn_tuples(cp); | |
38 | if (OP_STATUS(cp->pending_op) == OP_CANCELLED) { | |
39 | com_err(whoami, 0, "Closed connection (now %d client%s, %d new queries, %d old)", | |
40 | nclients-1, | |
41 | nclients!=2?"s":"", | |
42 | newqueries, | |
43 | oldqueries); | |
44 | clist_delete(cp); | |
45 | return; | |
46 | } | |
47 | switch (cp->action) { | |
48 | case CL_ACCEPT: | |
49 | case CL_SEND: | |
50 | /* Start recieving next request */ | |
51 | initialize_operation(cp->pending_op, sms_start_recv, | |
52 | (char *)&cp->args, (int (*)())NULL); | |
53 | queue_operation(cp->con, CON_INPUT, cp->pending_op); | |
54 | cp->action = CL_RECEIVE; | |
55 | break; | |
56 | case CL_RECEIVE: | |
57 | /* Data is here. Process it & start it heading back */ | |
58 | do_call(cp); /* This may block for a while. */ | |
59 | sms_destroy_reply(cp->args); | |
60 | cp->args = NULL; | |
61 | initialize_operation(cp->pending_op, sms_start_send, | |
62 | (char *)&cp->reply, (int (*)())NULL); | |
63 | queue_operation(cp->con, CON_OUTPUT, cp->pending_op); | |
64 | cp->action = CL_SEND; | |
65 | break; | |
66 | } | |
67 | } | |
68 | ||
69 | char *procnames[] = { | |
70 | "noop", | |
71 | "auth", | |
72 | "shutdown", | |
73 | "query", | |
74 | "access", | |
75 | }; | |
76 | ||
77 | ||
78 | void | |
79 | do_call(cl) | |
80 | client *cl; | |
81 | { | |
82 | int pn; | |
83 | cl->reply.sms_argc = 0; | |
84 | cl->reply.sms_status = 0; | |
85 | cl->reply.sms_version_no = cl->args->sms_version_no; | |
86 | if (((pn = cl->args->sms_procno) < 0) || | |
87 | (pn > SMS_MAX_PROC)) { | |
88 | com_err(whoami, 0, "procno out of range"); | |
89 | cl->reply.sms_status = SMS_UNKNOWN_PROC; | |
90 | return; | |
91 | } | |
92 | if (log_flags & LOG_ARGS) | |
93 | log_args(procnames[pn], cl->args->sms_version_no, | |
94 | cl->args->sms_argc, cl->args->sms_argv); | |
95 | else if (log_flags & LOG_REQUESTS) | |
96 | com_err(whoami, 0, "%s", procnames[pn]); | |
97 | ||
98 | switch(pn) { | |
99 | case SMS_NOOP: | |
100 | cl->reply.sms_status = 0; | |
101 | return; | |
102 | ||
103 | case SMS_AUTH: | |
104 | do_auth(cl); | |
105 | return; | |
106 | ||
107 | case SMS_QUERY: | |
108 | do_retr(cl); | |
109 | return; | |
110 | ||
111 | case SMS_ACCESS: | |
112 | do_access(cl); | |
113 | return; | |
114 | ||
115 | case SMS_SHUTDOWN: | |
116 | do_shutdown(cl); | |
117 | return; | |
118 | ||
119 | case SMS_DO_UPDATE: | |
120 | trigger_dcm(0, 0, cl); | |
121 | return; | |
122 | } | |
123 | } | |
124 | ||
125 | free_rtn_tuples(cp) | |
126 | client *cp; | |
127 | { | |
128 | register returned_tuples *temp; | |
129 | for (temp=cp->first; temp && OP_DONE(temp->op); ) { | |
130 | register returned_tuples *t1=temp; | |
131 | temp = t1->next; | |
132 | if (t1 == cp->last) cp->last = NULL; | |
133 | ||
134 | sms_destroy_reply(t1->retval); | |
135 | #ifdef notdef | |
136 | if (t1->retval) { | |
137 | register sms_params *p = t1->retval; | |
138 | if (p->sms_flattened) | |
139 | free(p->sms_flattened); | |
140 | if (p->sms_argl) | |
141 | free(p->sms_argl); | |
142 | free(p); | |
143 | } | |
144 | #endif notdef | |
145 | delete_operation(t1->op); | |
146 | free(t1); | |
147 | } | |
148 | cp->first = temp; | |
149 | } | |
150 | ||
151 | retr_callback(argc, argv, p_cp) | |
152 | register int argc; | |
153 | register char **argv; | |
154 | char *p_cp; | |
155 | { | |
156 | register client *cp = (client *)p_cp; | |
157 | /* | |
158 | * This takes too much advantage of the fact that | |
159 | * serialization of the data happens during the queue operation. | |
160 | */ | |
161 | sms_params *arg_tmp = (sms_params *)db_alloc(sizeof(sms_params)); | |
162 | returned_tuples *tp = (returned_tuples *) | |
163 | db_alloc(sizeof(returned_tuples)); | |
164 | register char **nargv = (char **)malloc(argc * sizeof(char *)); | |
165 | register int i; | |
166 | ||
167 | OPERATION op_tmp = create_operation(); | |
168 | ||
169 | if (sms_trim_args(argc, argv) == SMS_NO_MEM) { | |
170 | com_err(whoami, SMS_NO_MEM, "while trimming args"); | |
171 | } | |
172 | if (log_flags & LOG_RESP) | |
173 | log_args("return: ", cp->args->sms_version_no, argc, argv); | |
174 | ||
175 | tp->op = op_tmp; | |
176 | tp->retval = arg_tmp; | |
177 | tp->next = NULL; | |
178 | ||
179 | arg_tmp->sms_status = SMS_MORE_DATA; | |
180 | arg_tmp->sms_version_no = cp->args->sms_version_no; | |
181 | arg_tmp->sms_argc = argc; | |
182 | arg_tmp->sms_argv = nargv; | |
183 | for (i = 0; i < argc; i++) { | |
184 | register int len = strlen(argv[i]) + 1; | |
185 | nargv[i] = malloc(len); | |
186 | bcopy(argv[i], nargv[i], len); | |
187 | } | |
188 | arg_tmp->sms_flattened = (char *)NULL; | |
189 | arg_tmp->sms_argl = (int *)NULL; | |
190 | ||
191 | if (cp->last) { | |
192 | cp->last->next = tp; | |
193 | cp->last = tp; | |
194 | } else { | |
195 | cp->last = cp->first = tp; | |
196 | } | |
197 | ||
198 | reset_operation(op_tmp); | |
199 | initialize_operation(op_tmp, sms_start_send, (char *)arg_tmp, | |
200 | (int (*)())NULL); | |
201 | queue_operation(cp->con, CON_OUTPUT, op_tmp); | |
202 | } | |
203 | ||
204 | list_users(callbk, callarg) | |
205 | int (*callbk)(); | |
206 | char *callarg; | |
207 | { | |
208 | char *argv[6]; | |
209 | char buf[30]; | |
210 | char buf1[30]; | |
211 | int i; | |
212 | extern client **clients; | |
213 | extern char *inet_ntoa(); | |
214 | char *cp; | |
215 | char *index(); | |
216 | char *ctime(); | |
217 | ||
218 | for (i = 0; i < nclients; i++) { | |
219 | register client *cl = clients[i]; | |
220 | if (cl->clname) | |
221 | argv[0] = cl->clname; | |
222 | else argv[0] = "unauthenticated"; | |
223 | ||
224 | argv[1] = inet_ntoa(cl->haddr.sin_addr); | |
225 | argv[2] = buf; | |
226 | sprintf(buf, "port %d", ntohs(cl->haddr.sin_port)); | |
227 | argv[3] = ctime(&cl->last_time_used); | |
228 | cp = index(argv[3], '\n'); | |
229 | if (cp) *cp = '\0'; | |
230 | argv[4] = buf1; | |
231 | sprintf(buf1, "[#%d]", cl->id); | |
232 | (*callbk)(5, argv, callarg); | |
233 | } | |
234 | return 0; | |
235 | } | |
236 | ||
237 | do_retr(cl) | |
238 | register client *cl; | |
239 | { | |
240 | register char *queryname; | |
241 | ||
242 | cl->reply.sms_argc = 0; | |
243 | cl->reply.sms_status = 0; | |
244 | ||
245 | queryname = cl->args->sms_argv[0]; | |
246 | ||
247 | if (cl->args->sms_version_no == SMS_VERSION_2) | |
248 | newqueries++; | |
249 | else | |
250 | oldqueries++; | |
251 | ||
252 | if (strcmp(queryname, "_list_users") == 0) | |
253 | cl->reply.sms_status = list_users(retr_callback, (char *)cl); | |
254 | else { | |
255 | cl->reply.sms_status = | |
256 | sms_process_query(cl, | |
257 | cl->args->sms_argv[0], | |
258 | cl->args->sms_argc-1, | |
259 | cl->args->sms_argv+1, | |
260 | retr_callback, | |
261 | (char *)cl); | |
262 | } | |
263 | if (log_flags & LOG_RES) | |
264 | com_err(whoami, 0, "Query complete."); | |
265 | } | |
266 | ||
267 | do_access(cl) | |
268 | client *cl; | |
269 | { | |
270 | cl->reply.sms_argc = 0; | |
271 | ||
272 | cl->reply.sms_status = | |
273 | sms_check_access(cl, | |
274 | cl->args->sms_argv[0], | |
275 | cl->args->sms_argc-1, | |
276 | cl->args->sms_argv+1); | |
277 | ||
278 | com_err(whoami, 0, "Access check complete."); | |
279 | } | |
280 | ||
281 | ||
282 | /* trigger_dcm is also used as a followup routine to the | |
283 | * set_server_host_override query, hence the two dummy arguments. | |
284 | */ | |
285 | ||
286 | struct query pseudo_query = { | |
287 | "trigger_dcm", | |
288 | "tdcm", | |
289 | }; | |
290 | ||
291 | trigger_dcm(dummy0, dummy1, cl) | |
292 | int dummy0, dummy1; | |
293 | client *cl; | |
294 | { | |
295 | register int pid; | |
296 | ||
297 | cl->reply.sms_argc = 0; | |
298 | ||
299 | if (cl->reply.sms_status = check_query_access(&pseudo_query, 0, cl) ) | |
300 | return(cl->reply.sms_status); | |
301 | ||
302 | pid = vfork(); | |
303 | switch (pid) { | |
304 | case 0: | |
305 | execl("/u1/sms/bin/startdcm", "startdcm", 0); | |
306 | exit(1); | |
307 | ||
308 | case -1: | |
309 | cl->reply.sms_status = errno; | |
310 | return(0); | |
311 | ||
312 | default: | |
313 | return(0); | |
314 | } | |
315 | } | |
316 |