1 |
michael |
3252 |
/* Copyright (C) 2003,2004 Stephane Thiell |
2 |
|
|
* |
3 |
|
|
* This file is part of pxyscand/px (from pxys) |
4 |
|
|
* |
5 |
|
|
* This program is free software; you can redistribute it and/or |
6 |
|
|
* modify it under the terms of the GNU General Public License |
7 |
|
|
* as published by the Free Software Foundation; either version 2 |
8 |
|
|
* of the License, or (at your option) any later version. |
9 |
|
|
* |
10 |
|
|
* This program is distributed in the hope that it will be useful, |
11 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 |
|
|
* GNU General Public License for more details. |
14 |
|
|
* |
15 |
|
|
* You should have received a copy of the GNU General Public License |
16 |
|
|
* along with this program; if not, write to the Free Software |
17 |
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
18 |
|
|
* |
19 |
|
|
*/ |
20 |
|
|
#define RCSID "$Id: px.c,v 1.2 2004/01/03 01:03:16 mbuna Exp $" |
21 |
|
|
|
22 |
|
|
#ifdef HAVE_CONFIG_H |
23 |
|
|
#include "config.h" |
24 |
|
|
#endif |
25 |
|
|
|
26 |
|
|
#define DEFAULT_SERVER "127.0.0.1" |
27 |
|
|
#define DEFAULT_PORT 9601 |
28 |
|
|
|
29 |
|
|
/* OPAS library header */ |
30 |
|
|
#include <opas/opas.h> |
31 |
|
|
|
32 |
|
|
/* PEAK library header */ |
33 |
|
|
#include <peak/peak.h> |
34 |
|
|
|
35 |
|
|
#include <assert.h> |
36 |
|
|
#include <errno.h> |
37 |
|
|
#include <stdio.h> |
38 |
|
|
#include <signal.h> |
39 |
|
|
#include <string.h> |
40 |
|
|
#include <unistd.h> |
41 |
|
|
#include <sys/types.h> |
42 |
|
|
#include <sys/socket.h> |
43 |
|
|
#include <netinet/in.h> |
44 |
|
|
#include <arpa/inet.h> |
45 |
|
|
#include <netdb.h> |
46 |
|
|
|
47 |
|
|
#define PERROR(e) do { perror(e); exit(1); } while(0) |
48 |
|
|
|
49 |
|
|
/* Callback prototypes */ |
50 |
|
|
static void opas_send_cb(const void *data, uint32_t length, void *uptr); |
51 |
|
|
static void opas_reply_noproxy_cb(struct opas_msg_query *replyp, |
52 |
|
|
void *context); |
53 |
|
|
static void opas_reply_proxy_cb(struct opas_msg_reply_proxy *replyp, |
54 |
|
|
void *context); |
55 |
|
|
static void opas_reply_error_cb(struct opas_msg_reply_error *replyp, |
56 |
|
|
void *context); |
57 |
|
|
static void opas_reply6_noproxy_cb(struct opas_msg_query6 *replyp, |
58 |
|
|
void *context); |
59 |
|
|
static void opas_reply6_proxy_cb(struct opas_msg_reply6_proxy *replyp, |
60 |
|
|
void *context); |
61 |
|
|
static void opas_reply6_error_cb(struct opas_msg_reply6_error *replyp, |
62 |
|
|
void *context); |
63 |
|
|
static void opas_msg_user_cb(struct opas_msg_user_header *umsgp, void *data, |
64 |
|
|
void *context); |
65 |
|
|
|
66 |
|
|
static uint16_t opas_port = DEFAULT_PORT; |
67 |
|
|
static char *opas_server = DEFAULT_SERVER; |
68 |
|
|
static opas_session_t session; /* Our current OPAS session */ |
69 |
|
|
|
70 |
|
|
/* To open a new session, you need to define a few callbacks contained in |
71 |
|
|
a struct opas_callbacks. You don't define callbacks you don't want. |
72 |
|
|
*/ |
73 |
|
|
static const struct opas_callbacks opas_cbs = |
74 |
|
|
{ |
75 |
|
|
opas_send_cb, /* This one is called by the OPAS library when data needs to |
76 |
|
|
* be send. |
77 |
|
|
*/ |
78 |
|
|
|
79 |
|
|
/* IPv4 callbacks. |
80 |
|
|
*/ |
81 |
|
|
NULL, /* We don't plan to receive any queries, we are only a |
82 |
|
|
* client! :) |
83 |
|
|
*/ |
84 |
|
|
opas_reply_noproxy_cb, |
85 |
|
|
opas_reply_proxy_cb, |
86 |
|
|
opas_reply_error_cb, |
87 |
|
|
|
88 |
|
|
/* IPv6 callbacks defined as an example, but pxyscand doesn't support IPv6 |
89 |
|
|
* scanning yet. |
90 |
|
|
*/ |
91 |
|
|
NULL, /* No ipv6 query wanted neither. */ |
92 |
|
|
opas_reply6_noproxy_cb, |
93 |
|
|
opas_reply6_proxy_cb, |
94 |
|
|
opas_reply6_error_cb, |
95 |
|
|
opas_msg_user_cb |
96 |
|
|
}; |
97 |
|
|
|
98 |
|
|
static void |
99 |
|
|
display_usage() |
100 |
|
|
{ |
101 |
|
|
fprintf(stderr, "*** Usage: px [-v] [-s <server>] [-p <port>] <host>\n"); |
102 |
|
|
exit(1); |
103 |
|
|
} |
104 |
|
|
|
105 |
|
|
static void |
106 |
|
|
display_version() |
107 |
|
|
{ |
108 |
|
|
fprintf(stderr, "*** px (%s/%s) - OPAS command line client\n", |
109 |
|
|
PACKAGE, PACKAGE_VERSION); |
110 |
|
|
fprintf(stderr, "*** Part of pxys v.2 - http://pxys.sf.net\n"); |
111 |
|
|
fprintf(stderr, "*** %s\n", RCSID); |
112 |
|
|
exit(0); |
113 |
|
|
} |
114 |
|
|
|
115 |
|
|
static int |
116 |
|
|
parse_options(int *argc, char **argv[]) |
117 |
|
|
{ |
118 |
|
|
extern char *optarg; |
119 |
|
|
extern int optind; |
120 |
|
|
int c; |
121 |
|
|
|
122 |
|
|
while ((c = getopt(*argc, *argv, "p:s:v")) != -1) |
123 |
|
|
{ |
124 |
|
|
switch (c) |
125 |
|
|
{ |
126 |
|
|
case 'p': |
127 |
|
|
opas_port = (uint16_t)atoi(optarg); |
128 |
|
|
break; |
129 |
|
|
case 's': |
130 |
|
|
opas_server = strdup(optarg); |
131 |
|
|
break; |
132 |
|
|
case 'v': |
133 |
|
|
display_version(); |
134 |
|
|
break; |
135 |
|
|
case '?': |
136 |
|
|
default: |
137 |
|
|
display_usage(); |
138 |
|
|
break; |
139 |
|
|
} |
140 |
|
|
} |
141 |
|
|
|
142 |
|
|
*argc -= optind; |
143 |
|
|
*argv += optind; |
144 |
|
|
return 0; |
145 |
|
|
} |
146 |
|
|
|
147 |
|
|
static void |
148 |
|
|
stream_event_read(peak_stream s, opas_session_t session) |
149 |
|
|
{ |
150 |
|
|
char buffer[1024]; |
151 |
|
|
int result; |
152 |
|
|
|
153 |
|
|
/* When we have something to read, we feed the OPAS library. If something |
154 |
|
|
* interesting is available, the library call one of the previously defined |
155 |
|
|
* callbacks. |
156 |
|
|
*/ |
157 |
|
|
result = peak_stream_read(s, buffer, sizeof(buffer)); |
158 |
|
|
if (opas_feed(session, buffer, result) == -1) |
159 |
|
|
{ |
160 |
|
|
fprintf(stderr, "opas_feed() failure - bad reply from server\n"); |
161 |
|
|
exit(1); |
162 |
|
|
} |
163 |
|
|
} |
164 |
|
|
|
165 |
|
|
static void |
166 |
|
|
stream_event(peak_stream s, int type, void *context) |
167 |
|
|
{ |
168 |
|
|
char ipbuf[16]; |
169 |
|
|
struct sockaddr_in sin; |
170 |
|
|
int len; |
171 |
|
|
|
172 |
|
|
switch (type) |
173 |
|
|
{ |
174 |
|
|
case PEAK_STREAM_EVT_OPEN: |
175 |
|
|
len = sizeof(sin); |
176 |
|
|
peak_stream_get_address(s, (struct sockaddr *)&sin, &len); |
177 |
|
|
if (!inet_ntop(AF_INET, &sin.sin_addr, ipbuf, sizeof(ipbuf))) |
178 |
|
|
abort(); |
179 |
|
|
printf("Connected to %s.\n", ipbuf); |
180 |
|
|
break; |
181 |
|
|
case PEAK_STREAM_EVT_READ: |
182 |
|
|
stream_event_read(s, session); |
183 |
|
|
break; |
184 |
|
|
case PEAK_STREAM_EVT_END: |
185 |
|
|
fprintf(stderr, "Connection closed by server\n"); |
186 |
|
|
exit(1); |
187 |
|
|
break; |
188 |
|
|
case PEAK_STREAM_EVT_ERROR: |
189 |
|
|
fprintf(stderr, "Socket stream error (server refused the" |
190 |
|
|
" connection?)\n"); |
191 |
|
|
exit(1); |
192 |
|
|
break; |
193 |
|
|
default: |
194 |
|
|
break; |
195 |
|
|
} |
196 |
|
|
} |
197 |
|
|
|
198 |
|
|
/* Called by the OPAS library when something needs to be send. |
199 |
|
|
*/ |
200 |
|
|
static void |
201 |
|
|
opas_send_cb(const void *data, uint32_t length, void *uptr) |
202 |
|
|
{ |
203 |
|
|
peak_stream_write_buffered((peak_stream)uptr, data, length); |
204 |
|
|
} |
205 |
|
|
|
206 |
|
|
/* Called by the OPAS library when a negative reply arrives. |
207 |
|
|
*/ |
208 |
|
|
static void |
209 |
|
|
opas_reply_noproxy_cb(struct opas_msg_query *replyp, void *context) |
210 |
|
|
{ |
211 |
|
|
char ipbuf[16]; |
212 |
|
|
|
213 |
|
|
printf("Got reply from OPAS server:\n"); |
214 |
|
|
|
215 |
|
|
if (!inet_ntop(AF_INET, &replyp->addr, ipbuf, sizeof(ipbuf))) |
216 |
|
|
abort(); |
217 |
|
|
|
218 |
|
|
printf("NOPROXY : No proxy found on %s\n", ipbuf); |
219 |
|
|
|
220 |
|
|
exit(0); /* Don't bother. */ |
221 |
|
|
} |
222 |
|
|
|
223 |
|
|
/* Called by the OPAS library when a proxy has been found! |
224 |
|
|
*/ |
225 |
|
|
static void |
226 |
|
|
opas_reply_proxy_cb(struct opas_msg_reply_proxy *replyp, void *context) |
227 |
|
|
{ |
228 |
|
|
char ipbuf[16]; |
229 |
|
|
|
230 |
|
|
printf("Got reply from OPAS server:\n"); |
231 |
|
|
|
232 |
|
|
if (!inet_ntop(AF_INET, &replyp->addr, ipbuf, sizeof(ipbuf))) |
233 |
|
|
abort(); |
234 |
|
|
|
235 |
|
|
printf("PROXY : Proxy found on address %s\n", ipbuf); |
236 |
|
|
|
237 |
|
|
printf("%ld,type=%u,%s at port %u\n", replyp->timestamp, |
238 |
|
|
replyp->proxy_type, replyp->proxy_descr, replyp->proxy_port); |
239 |
|
|
|
240 |
|
|
if (replyp->head & OPAS_FLAG_CACH) |
241 |
|
|
printf("This proxy has been found in cache.\n"); |
242 |
|
|
|
243 |
|
|
exit(0); /* Don't bother. */ |
244 |
|
|
} |
245 |
|
|
|
246 |
|
|
static void |
247 |
|
|
opas_reply_error_cb(struct opas_msg_reply_error *replyp, void *context) |
248 |
|
|
{ |
249 |
|
|
char ipbuf[16]; |
250 |
|
|
|
251 |
|
|
printf("Got reply from OPAS server:\n"); |
252 |
|
|
|
253 |
|
|
if (!inet_ntop(AF_INET, &replyp->addr, ipbuf, sizeof(ipbuf))) |
254 |
|
|
abort(); |
255 |
|
|
|
256 |
|
|
printf("ERROR : An error occured; unknown result for %s\n", ipbuf); |
257 |
|
|
|
258 |
|
|
switch (replyp->error) |
259 |
|
|
{ |
260 |
|
|
case OPAS_ERROR_UNKNOWN: |
261 |
|
|
printf(" Unknown OPAS error\n"); |
262 |
|
|
break; |
263 |
|
|
case OPAS_ERROR_NETDOWN: |
264 |
|
|
printf(" NETDOWN: network/host is down\n"); |
265 |
|
|
break; |
266 |
|
|
case OPAS_ERROR_NETUNREACH: |
267 |
|
|
printf(" NETUNREACH: network/host is not reachable\n"); |
268 |
|
|
break; |
269 |
|
|
case 1000: |
270 |
|
|
printf(" pxyscand resource error\n"); |
271 |
|
|
break; |
272 |
|
|
default: |
273 |
|
|
printf(" Really unknown error!\n"); |
274 |
|
|
break; |
275 |
|
|
} |
276 |
|
|
|
277 |
|
|
exit(0); |
278 |
|
|
} |
279 |
|
|
|
280 |
|
|
/* IPv6: Called by the OPAS library when a negative reply arrives. |
281 |
|
|
*/ |
282 |
|
|
static void |
283 |
|
|
opas_reply6_noproxy_cb(struct opas_msg_query6 *replyp, void *context) |
284 |
|
|
{ |
285 |
|
|
printf("opas_reply6_noproxy_cb\n"); |
286 |
|
|
exit(0); |
287 |
|
|
} |
288 |
|
|
|
289 |
|
|
/* IPv6: Called by the OPAS library when a proxy has been found! |
290 |
|
|
*/ |
291 |
|
|
static void |
292 |
|
|
opas_reply6_proxy_cb(struct opas_msg_reply6_proxy *replyp, void *context) |
293 |
|
|
{ |
294 |
|
|
printf("opas_reply6_proxy_cb\n"); |
295 |
|
|
exit(0); |
296 |
|
|
} |
297 |
|
|
|
298 |
|
|
/* IPv6: Called by the OPAS library when an host can't be scanned. |
299 |
|
|
*/ |
300 |
|
|
static void |
301 |
|
|
opas_reply6_error_cb(struct opas_msg_reply6_error *replyp, void *context) |
302 |
|
|
{ |
303 |
|
|
printf("opas_reply6_error_cb\n"); |
304 |
|
|
exit(0); |
305 |
|
|
} |
306 |
|
|
|
307 |
|
|
/* User message over OPAS |
308 |
|
|
*/ |
309 |
|
|
static void |
310 |
|
|
opas_msg_user_cb(struct opas_msg_user_header *umsgp, void *data, |
311 |
|
|
void *context) |
312 |
|
|
{ |
313 |
|
|
printf("OPAS msg user (not handled)\n"); |
314 |
|
|
} |
315 |
|
|
|
316 |
|
|
static void |
317 |
|
|
create_tcp_session(struct in_addr *in) |
318 |
|
|
{ |
319 |
|
|
struct sockaddr_in sin; |
320 |
|
|
peak_stream s; |
321 |
|
|
int err; |
322 |
|
|
|
323 |
|
|
memset(&sin, 0, sizeof(struct sockaddr_in)); |
324 |
|
|
sin.sin_family = AF_INET; |
325 |
|
|
sin.sin_addr = *in; |
326 |
|
|
sin.sin_port = htons(opas_port); |
327 |
|
|
|
328 |
|
|
s = peak_stream_socket_create((struct sockaddr *)&sin, |
329 |
|
|
sizeof(struct sockaddr_in), |
330 |
|
|
PEAK_STREAM_OPT_DEFAULT, |
331 |
|
|
stream_event, |
332 |
|
|
NULL); |
333 |
|
|
assert(s != NULL); |
334 |
|
|
|
335 |
|
|
peak_stream_set_buffered(s, 1, 0, 8192, NULL); |
336 |
|
|
err = peak_stream_connect(s); |
337 |
|
|
if (err) |
338 |
|
|
{ |
339 |
|
|
fprintf(stderr, "Can't connect to host\n"); |
340 |
|
|
exit(1); |
341 |
|
|
} |
342 |
|
|
|
343 |
|
|
peak_stream_schedule(s, peak_task_self()); |
344 |
|
|
|
345 |
|
|
session = opas_open_session(&opas_cbs, (void*)s); |
346 |
|
|
assert(session != NULL); |
347 |
|
|
} |
348 |
|
|
|
349 |
|
|
|
350 |
|
|
static void |
351 |
|
|
send_query(struct in_addr *in) |
352 |
|
|
{ |
353 |
|
|
opas_query(session, in, 0xc0ffee); |
354 |
|
|
} |
355 |
|
|
|
356 |
|
|
int |
357 |
|
|
main(int argc, char *argv[]) |
358 |
|
|
{ |
359 |
|
|
struct hostent *h; |
360 |
|
|
struct in_addr in_server, in_host; |
361 |
|
|
|
362 |
|
|
parse_options(&argc, &argv); |
363 |
|
|
if (argc < 1) |
364 |
|
|
display_usage(); |
365 |
|
|
|
366 |
|
|
if ((h = gethostbyname(opas_server)) == NULL) |
367 |
|
|
{ |
368 |
|
|
fprintf(stderr, "%s: unknown host\n", opas_server); |
369 |
|
|
return 1; |
370 |
|
|
} |
371 |
|
|
memcpy((void *)&in_server.s_addr, *h->h_addr_list, h->h_length); |
372 |
|
|
|
373 |
|
|
if ((h = gethostbyname(argv[0])) == NULL) |
374 |
|
|
{ |
375 |
|
|
fprintf(stderr, "%s: unknown host\n", argv[0]); |
376 |
|
|
return 1; |
377 |
|
|
} |
378 |
|
|
memcpy((void *)&in_host.s_addr, *h->h_addr_list, h->h_length); |
379 |
|
|
|
380 |
|
|
create_tcp_session(&in_server); |
381 |
|
|
send_query(&in_host); |
382 |
|
|
peak_task_run(peak_task_self()); |
383 |
|
|
return 0; |
384 |
|
|
} |