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Commit | Line | Data |
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fa59b86f | 1 | /* $Id$ |
e2a67c78 | 2 | * |
7ac48069 | 3 | * This routine is part of the client library. It handles |
4 | * creating a connection to the moira server. | |
5eaef520 | 5 | * |
7ac48069 | 6 | * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology |
7 | * For copying and distribution information, please see the file | |
8 | * <mit-copyright.h>. | |
e2a67c78 | 9 | */ |
10 | ||
babbc197 | 11 | #include <mit-copyright.h> |
7ac48069 | 12 | #include <moira.h> |
8defc06b | 13 | #include <moira_site.h> |
7ac48069 | 14 | #include "mr_private.h" |
15 | ||
85330553 | 16 | #include <sys/types.h> |
17 | #include <sys/socket.h> | |
18 | ||
19 | #include <netinet/in.h> | |
20 | #include <netdb.h> | |
21 | ||
7ac48069 | 22 | #include <errno.h> |
a43ce477 | 23 | #include <stdlib.h> |
7ac48069 | 24 | #include <string.h> |
85330553 | 25 | #include <unistd.h> |
7ac48069 | 26 | |
a43ce477 | 27 | #include <hesiod.h> |
05fb8281 | 28 | |
7ac48069 | 29 | RCSID("$Header$"); |
30 | ||
85330553 | 31 | int _mr_conn = 0; |
32 | static char *mr_server_host = NULL; | |
33 | ||
34 | /* mrgdb compatibility magic | |
35 | ||
36 | The data looks like this: | |
37 | ||
38 | client -> server | |
39 | 00000036 [length of rest of packet] | |
40 | 00000004 [number of fields] | |
41 | 01 01 01 01 [types of fields: 4 strings] | |
42 | "server_id\0parms\0host\0user\0" [field names] | |
43 | 00000001 [length of null-terminated server_id] | |
44 | "\0" [server_id: ignored anyway] | |
45 | 00000001 [length of null-terminated parms] | |
46 | "\0" [parms: ignored anyway] | |
47 | 00000001 [length of null-terminated client host] | |
48 | "\0" [host: ignored anyway] | |
49 | 00000001 [length of null-terminated client name] | |
50 | "\0" [user: ignored anyway] | |
51 | ||
52 | server -> client | |
53 | 00000031 [length of rest of packet] | |
54 | 00000003 [number of fields] | |
55 | 00 01 01 [types of fields: int and 2 strings] | |
56 | "disposition\0server_id\0parms\0" [field names] | |
57 | 00000001 [GDB_ACCEPTED] | |
58 | 00000001 [length of null-terminated server_id] | |
59 | "\0" [server_id: ignored anyway] | |
60 | 00000001 [length of null-terminated parms] | |
61 | "\0" [parms: ignored anyway] | |
62 | ||
63 | */ | |
64 | ||
65 | static char challenge[58] = "\0\0\0\066\0\0\0\004\001\001\001\001server_id\0parms\0host\0user\0\0\0\0\001\0\0\0\0\001\0\0\0\0\001\0\0\0\0\001\0"; | |
66 | static char response[53] = "\0\0\0\061\0\0\0\003\0\001\001disposition\0server_id\0parms\0\0\0\0\001\0\0\0\001\0\0\0\0\001\0"; | |
e2a67c78 | 67 | |
68 | /* | |
85330553 | 69 | * Open a connection to the moira server. Looks for the server name |
5450e3a1 | 70 | * 1) passed as an argument, 2) in environment variable, 3) by hesiod |
85330553 | 71 | * 4) compiled in default |
e2a67c78 | 72 | */ |
73 | ||
5eaef520 | 74 | int mr_connect(char *server) |
e2a67c78 | 75 | { |
85330553 | 76 | char *port, **pp, *sbuf = NULL; |
77 | struct hostent *shost; | |
5eaef520 | 78 | |
5eaef520 | 79 | if (_mr_conn) |
80 | return MR_ALREADY_CONNECTED; | |
85330553 | 81 | if (!mr_inited) |
82 | mr_init(); | |
5eaef520 | 83 | |
84 | if (!server || (strlen(server) == 0)) | |
85 | server = getenv("MOIRASERVER"); | |
5450e3a1 | 86 | |
87 | #ifdef HESIOD | |
5eaef520 | 88 | if (!server || (strlen(server) == 0)) |
89 | { | |
90 | pp = hes_resolve("moira", "sloc"); | |
91 | if (pp) | |
92 | server = *pp; | |
5450e3a1 | 93 | } |
a43ce477 | 94 | #endif |
5450e3a1 | 95 | |
5eaef520 | 96 | if (!server || (strlen(server) == 0)) |
97 | server = MOIRA_SERVER; | |
5450e3a1 | 98 | |
85330553 | 99 | shost = gethostbyname(server); |
100 | if (!shost) | |
101 | return MR_CANT_CONNECT; | |
102 | ||
103 | if (strchr(server, ':')) | |
5eaef520 | 104 | { |
85330553 | 105 | int len = strcspn(server, ":"); |
106 | sbuf = malloc(len + 1); | |
107 | strncpy(sbuf, server, len); | |
108 | sbuf[len - 1] = '\0'; | |
5eaef520 | 109 | server = sbuf; |
85330553 | 110 | port = strchr(server, ':') + 1; |
111 | } | |
112 | else | |
113 | port = strchr(MOIRA_SERVER, ':') + 1; | |
114 | ||
115 | _mr_conn = mr_connect_internal(server, port); | |
116 | free(sbuf); | |
117 | if (!_mr_conn) | |
118 | return MR_CANT_CONNECT; | |
119 | ||
120 | /* stash hostname for later use */ | |
121 | mr_server_host = strdup(shost->h_name); | |
122 | return MR_SUCCESS; | |
123 | } | |
124 | ||
125 | int mr_connect_internal(char *server, char *port) | |
126 | { | |
127 | int fd, size, more; | |
128 | struct sockaddr_in target; | |
129 | struct hostent *shost; | |
130 | char actualresponse[53]; | |
131 | ||
132 | shost = gethostbyname(server); | |
133 | if (!shost) | |
134 | return 0; | |
135 | ||
136 | if (port[0] == '#') | |
137 | target.sin_port = atoi(port + 1); | |
138 | else | |
139 | { | |
140 | struct servent *s; | |
141 | s = getservbyname(port, "tcp"); | |
142 | if (s) | |
143 | target.sin_port = s->s_port; | |
144 | else | |
145 | return 0; | |
5450e3a1 | 146 | } |
147 | ||
85330553 | 148 | memcpy(&target.sin_addr, shost->h_addr, shost->h_length); |
149 | target.sin_family = shost->h_addrtype; | |
150 | ||
151 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
152 | if (fd < 0) | |
153 | return 0; | |
154 | ||
155 | if (connect(fd, (struct sockaddr *)&target, sizeof(target)) < 0) | |
5eaef520 | 156 | { |
85330553 | 157 | close(fd); |
158 | return 0; | |
83e80378 | 159 | } |
05fb8281 | 160 | |
85330553 | 161 | /* Do magic mrgdb initialization */ |
162 | size = write(fd, challenge, sizeof(challenge)); | |
163 | if (size != sizeof(challenge)) | |
164 | { | |
165 | close(fd); | |
166 | return 0; | |
167 | } | |
168 | for (size = 0; size < sizeof(actualresponse); size += more) | |
169 | { | |
170 | more = read(fd, actualresponse + size, sizeof(actualresponse) - size); | |
171 | if (!more) | |
172 | break; | |
173 | } | |
174 | if (size != sizeof(actualresponse)) | |
175 | { | |
176 | close(fd); | |
177 | return 0; | |
178 | } | |
179 | if (memcmp(actualresponse, response, sizeof(actualresponse))) | |
180 | { | |
181 | close(fd); | |
182 | return 0; | |
183 | } | |
05fb8281 | 184 | |
85330553 | 185 | /* You win */ |
186 | return fd; | |
e2a67c78 | 187 | } |
5eaef520 | 188 | |
189 | int mr_disconnect(void) | |
e2a67c78 | 190 | { |
5eaef520 | 191 | CHECK_CONNECTED; |
85330553 | 192 | close(_mr_conn); |
193 | _mr_conn = 0; | |
5eaef520 | 194 | free(mr_server_host); |
85330553 | 195 | mr_server_host = NULL; |
196 | return MR_SUCCESS; | |
e2a67c78 | 197 | } |
198 | ||
5eaef520 | 199 | int mr_host(char *host, int size) |
05fb8281 | 200 | { |
5eaef520 | 201 | CHECK_CONNECTED; |
05fb8281 | 202 | |
5eaef520 | 203 | /* If we are connected, mr_server_host points to a valid string. */ |
204 | strncpy(host, mr_server_host, size); | |
85330553 | 205 | host[size - 1] = '\0'; |
206 | return MR_SUCCESS; | |
05fb8281 | 207 | } |
208 | ||
5eaef520 | 209 | int mr_noop(void) |
e2a67c78 | 210 | { |
5eaef520 | 211 | int status; |
85330553 | 212 | mr_params params, reply; |
5eaef520 | 213 | |
214 | CHECK_CONNECTED; | |
85330553 | 215 | params.u.mr_procno = MR_NOOP; |
216 | params.mr_argc = 0; | |
217 | params.mr_argl = NULL; | |
218 | params.mr_argv = NULL; | |
5eaef520 | 219 | |
85330553 | 220 | if ((status = mr_do_call(¶ms, &reply)) == MR_SUCCESS) |
221 | status = reply.u.mr_status; | |
5eaef520 | 222 | |
223 | mr_destroy_reply(reply); | |
224 | ||
225 | return status; | |
6c00b7c4 | 226 | } |
85330553 | 227 | |
228 | ||
229 | /* Server side */ | |
230 | ||
231 | int mr_listen(char *port) | |
232 | { | |
233 | struct sockaddr_in sin; | |
234 | int s, on = 1; | |
235 | ||
236 | memset(&sin, 0, sizeof(sin)); | |
237 | if (port[0] == '#') | |
238 | sin.sin_port = atoi(port + 1); | |
239 | else | |
240 | { | |
241 | struct servent *s; | |
242 | s = getservbyname(port, "tcp"); | |
243 | if (s) | |
244 | sin.sin_port = s->s_port; | |
245 | else | |
246 | return -1; | |
247 | } | |
248 | ||
249 | s = socket(AF_INET, SOCK_STREAM, 0); | |
250 | if (s < 0) | |
251 | return -1; | |
252 | if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(int)) < 0) | |
253 | { | |
254 | close(s); | |
255 | return -1; | |
256 | } | |
257 | if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) | |
258 | { | |
259 | close(s); | |
260 | return -1; | |
261 | } | |
262 | if (listen(s, 5) < 0) | |
263 | { | |
264 | close(s); | |
265 | return -1; | |
266 | } | |
267 | ||
268 | return s; | |
269 | } | |
270 | ||
271 | int mr_accept(int s, struct sockaddr_in *sin) | |
272 | { | |
273 | int conn, addrlen = sizeof(struct sockaddr_in); | |
274 | char lbuf[4], *buf; | |
275 | long len, size, more; | |
276 | ||
277 | conn = accept(s, (struct sockaddr *)sin, &addrlen); | |
278 | if (conn < 0) | |
279 | return -1; | |
280 | ||
281 | /* Now do mrgdb accept protocol */ | |
282 | /* XXX timeout */ | |
283 | ||
284 | if (read(conn, lbuf, 4) != 4) | |
285 | { | |
286 | close(conn); | |
287 | return -1; | |
288 | } | |
289 | getlong(lbuf, len); | |
290 | ||
291 | buf = malloc(len); | |
292 | if (!buf || len < 54) | |
293 | { | |
294 | close(conn); | |
295 | free(buf); | |
296 | return -1; | |
297 | } | |
298 | ||
299 | for (size = 0; size < len; size += more) | |
300 | { | |
301 | more = read(conn, buf + size, len - size); | |
302 | if (!more) | |
303 | break; | |
304 | } | |
305 | if (size != len) | |
306 | { | |
307 | close(conn); | |
308 | free(buf); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | if (memcmp(buf, challenge + 4, 34)) | |
313 | { | |
314 | close(conn); | |
315 | free(buf); | |
316 | return 0; | |
317 | } | |
318 | ||
319 | /* good enough */ | |
320 | free(buf); | |
321 | ||
322 | if (write(conn, response, sizeof(response)) != sizeof(response)) | |
323 | { | |
324 | close(conn); | |
325 | return -1; | |
326 | } | |
327 | return conn; | |
328 | } |