/[svn]/hopm/branches/1.0.x/src/dnsbl.c
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Contents of /hopm/branches/1.0.x/src/dnsbl.c

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Revision 5257 - (show annotations)
Thu Jan 1 16:25:09 2015 UTC (7 years, 6 months ago) by michael
File MIME type: text/x-chdr
File size: 7813 byte(s)
- dnsbl.c:dnsbl_report(): add separate DNSBL_REPORT_VERSION definition

1 /*
2 Copyright (C) 2002-2003 Erik Fears
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16
17 Foundation, Inc.
18 59 Temple Place - Suite 330
19 Boston, MA 02111-1307, USA.
20
21 */
22
23 #include "setup.h"
24
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <sys/types.h>
29 #include <sys/socket.h>
30 #include <netinet/in.h>
31 #include <arpa/inet.h>
32 #include <time.h>
33 #include <errno.h>
34
35 #include "compat.h"
36 #include "config.h"
37 #include "dnsbl.h"
38 #include "list.h"
39 #include "log.h"
40 #include "main.h"
41 #include "malloc.h"
42 #include "match.h"
43 #include "scan.h"
44 #include "irc.h"
45 #include "stats.h"
46
47
48 /*
49 * Work out the DNSBL zones and send the dns query
50 */
51 void
52 dnsbl_add(struct scan_struct *ss)
53 {
54 struct in_addr in;
55 unsigned char a, b, c, d;
56 char lookup[128];
57 node_t *p;
58 int res;
59 struct dnsbl_scan *ds;
60
61
62 if (inet_pton(AF_INET, ss->ip, &in) <= 0)
63 {
64 log_printf("DNSBL -> Invalid address '%s', ignoring.", ss->ip);
65 return;
66 }
67
68 d = (unsigned char)(in.s_addr >> 24) & 0xFF;
69 c = (unsigned char)(in.s_addr >> 16) & 0xFF;
70 b = (unsigned char)(in.s_addr >> 8) & 0xFF;
71 a = (unsigned char) in.s_addr & 0xFF;
72
73 LIST_FOREACH(p, OpmItem->blacklists->head)
74 {
75 struct BlacklistConf *bl = p->data;
76
77 #ifdef WORDS_BIGENDIAN
78 snprintf(lookup, 128, "%d.%d.%d.%d.%s", a, b, c, d, bl->name);
79 #else
80 snprintf(lookup, 128, "%d.%d.%d.%d.%s", d, c, b, a, bl->name);
81 #endif
82
83 ds = MyMalloc(sizeof *ds);
84 ds->ss = ss;
85 ds->bl = bl;
86
87 if (OPT_DEBUG)
88 log_printf("DNSBL -> Passed '%s' to resolver", lookup);
89
90 res = firedns_getip(FDNS_QRY_A, lookup, (void *) ds);
91
92 if (res == -1 && fdns_errno != FDNS_ERR_FDLIMIT)
93 {
94 log_printf("DNSBL -> Error sending dns lookup for '%s': %s", lookup, firedns_strerror(fdns_errno));
95 free(ds);
96 }
97 else
98 ++ss->scans; /* Increase scan count - one for each blacklist */
99 }
100 }
101
102 static void
103 dnsbl_positive(struct scan_struct *ss, struct BlacklistConf *bl, unsigned char type)
104 {
105 char text_type[128] = "";
106 node_t *p;
107
108 if (bl->type == A_BITMASK)
109 {
110 LIST_FOREACH(p, bl->reply->head)
111 {
112 struct BlacklistReplyConf *item = p->data;
113
114 if (item->number & type)
115 {
116 strncat(text_type, item->type, sizeof(text_type) - strlen(text_type) - 2);
117 text_type[sizeof(text_type) - 2] = '\0';
118
119 strncat(text_type, ", ", sizeof(text_type) - strlen(text_type) - 1);
120 text_type[sizeof(text_type) - 1] = '\0';
121 }
122 }
123
124 if (text_type[0])
125 *(strrchr(text_type, ',')) = '\0';
126 }
127 else
128 {
129 LIST_FOREACH(p, bl->reply->head)
130 {
131 struct BlacklistReplyConf *item = p->data;
132
133 if (item->number == type)
134 {
135 strlcpy(text_type, item->type, sizeof(text_type));
136 break;
137 }
138 }
139 }
140
141 if (text_type[0] == '\0' && bl->ban_unknown == 0)
142 {
143 if (OPT_DEBUG)
144 log_printf("DNSBL -> Unknown result from BL zone %s (%d)", bl->name, type);
145
146 return;
147 }
148
149 if (ss->manual_target)
150 irc_send("PRIVMSG %s :CHECK -> DNSBL -> %s appears in BL zone %s (%s)",
151 ss->manual_target->name, ss->ip, bl->name, text_type);
152 else if (!ss->positive)
153 {
154 /* Only report it if no other scans have found positives yet. */
155 scan_positive(ss, (bl->kline[0] ? bl->kline : IRCItem->kline), text_type);
156
157 irc_send_channels("DNSBL -> %s!%s@%s appears in BL zone %s (%s)",
158 ss->irc_nick, ss->irc_username, ss->irc_hostname, bl->name,
159 text_type);
160 log_printf("DNSBL -> %s!%s@%s appears in BL zone %s (%s)",
161 ss->irc_nick, ss->irc_username, ss->irc_hostname, bl->name,
162 text_type);
163 }
164
165 /* Record stat */
166 stats_dnsblrecv(bl);
167 }
168
169 void
170 dnsbl_result(struct firedns_result *res)
171 {
172 struct dnsbl_scan *ds = res->info;
173
174 if (OPT_DEBUG)
175 {
176 if (ds->ss->manual_target)
177 log_printf("DNSBL -> Lookup result for %s (%s) %d.%d.%d.%d (error: %d)",
178 ds->ss->ip,
179 res->lookup,
180 (unsigned char)res->text[0],
181 (unsigned char)res->text[1],
182 (unsigned char)res->text[2],
183 (unsigned char)res->text[3], fdns_errno);
184 else
185 log_printf("DNSBL -> Lookup result for %s!%s@%s (%s) %d.%d.%d.%d (error: %d)",
186 ds->ss->irc_nick,
187 ds->ss->irc_username,
188 ds->ss->irc_hostname,
189 res->lookup,
190 (unsigned char)res->text[0],
191 (unsigned char)res->text[1],
192 (unsigned char)res->text[2],
193 (unsigned char)res->text[3], fdns_errno);
194 }
195
196 /* Everything is OK */
197 if (res->text[0] == '\0' && fdns_errno == FDNS_ERR_NXDOMAIN)
198 {
199 if (ds->ss->manual_target)
200 irc_send("PRIVMSG %s :CHECK -> DNSBL -> %s does not appear in BL zone %s",
201 ds->ss->manual_target->name, ds->ss->ip,
202 (strlen(ds->ss->ip) < strlen(res->lookup)) ? (res->lookup + strlen(ds->ss->ip) + 1) : res->lookup);
203
204 --ds->ss->scans; /* We are done with ss here */
205 scan_checkfinished(ds->ss); /* This could free ss, don't use ss after this point */
206 MyFree(ds); /* No longer need our information */
207 return;
208 }
209
210 /* Either an error, or a positive lookup */
211 if (fdns_errno == FDNS_ERR_NONE)
212 dnsbl_positive(ds->ss, ds->bl, (unsigned char)res->text[3]);
213 else
214 {
215 log_printf("DNSBL -> Lookup error on %s: %s", res->lookup,
216 firedns_strerror(fdns_errno));
217
218 if (fdns_errno != FDNS_ERR_TIMEOUT)
219 irc_send_channels("DNSBL -> Lookup error on %s: %s", res->lookup,
220 firedns_strerror(fdns_errno));
221 }
222
223 /* Check if ss has any remaining scans */
224 --ds->ss->scans; /* We are done with ss here */
225 scan_checkfinished(ds->ss); /* This could free ss, don't use ss after this point */
226 MyFree(ds); /* Finished with dnsbl_scan too */
227 }
228
229 void
230 dnsbl_cycle(void)
231 {
232 firedns_cycle();
233 }
234
235 #define DNSBL_REPORT_VERSION "3.1.3"
236
237 /*
238 * Send an email to report this open proxy.
239 */
240 void
241 dnsbl_report(struct scan_struct *ss)
242 {
243 char buf[4096], cmdbuf[512];
244 FILE *fp;
245
246 if (ss->ip == NULL)
247 return;
248
249 if (EmptyString(OpmItem->dnsbl_to) || EmptyString(OpmItem->dnsbl_from) || EmptyString(OpmItem->sendmail))
250 return;
251
252 snprintf(cmdbuf, sizeof(cmdbuf), "%s -t", OpmItem->sendmail);
253 snprintf(buf, sizeof(buf),
254 "From: %s <%s>\n"
255 "To: %s\n"
256 "Subject: BOPM Report\n"
257 "X-BOPM-Version: %s\n\n"
258 "%s: %s:%d\n\n"
259 "%s\n", IRCItem->nick, OpmItem->dnsbl_from, OpmItem->dnsbl_to,
260 DNSBL_REPORT_VERSION, scan_gettype(ss->remote->protocol), ss->ip,
261 ss->remote->port, ss->proof);
262
263 if (OPT_DEBUG >= 3)
264 log_printf("DNSBL -> Sending following email:\n%s\n", buf);
265
266 if ((fp = popen(cmdbuf, "w")) == NULL)
267 {
268 log_printf("DNSBL -> Failed to create pipe to '%s' for email report!", cmdbuf);
269 irc_send_channels("I was trying to create a pipe to'%s' to send a DNSBL "
270 "report, and it failed! I'll give up for now.",
271 cmdbuf);
272 return;
273 }
274
275 fputs(buf, fp);
276 pclose(fp);
277
278 log_printf("DNSBL -> Sent report to %s [%s]", OpmItem->dnsbl_to, ss->ip);
279
280 /* Record send in stats */
281 stats_dnsblsend();
282 }

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