1 /******************************************************************************/
2 /* pfixtools: a collection of postfix related tools */
4 /* ________________________________________________________________________ */
6 /* Redistribution and use in source and binary forms, with or without */
7 /* modification, are permitted provided that the following conditions */
10 /* 1. Redistributions of source code must retain the above copyright */
11 /* notice, this list of conditions and the following disclaimer. */
12 /* 2. Redistributions in binary form must reproduce the above copyright */
13 /* notice, this list of conditions and the following disclaimer in the */
14 /* documentation and/or other materials provided with the distribution. */
15 /* 3. The names of its contributors may not be used to endorse or promote */
16 /* products derived from this software without specific prior written */
19 /* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND */
20 /* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE */
21 /* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
22 /* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS */
23 /* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR */
24 /* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF */
25 /* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS */
26 /* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN */
27 /* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) */
28 /* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF */
29 /* THE POSSIBILITY OF SUCH DAMAGE. */
30 /******************************************************************************/
33 * Copyright © 2007 Pierre Habouzit
49 TCBDB *awl_db, *obj_db;
62 const char *sender_normalize(const char *sender, char *buf, int len)
64 const char *at = strchr(sender, '@');
65 int rpos = 0, wpos = 0, userlen;
70 /* strip extension used for VERP or alike */
71 userlen = ((char *)memchr(sender, '+', at - sender) ?: at) - sender;
73 while (rpos < userlen) {
76 while (isdigit(sender[rpos + count]) && rpos + count < userlen)
78 if (count && !isalnum(sender[rpos + count])) {
79 /* replace \<\d+\> with '#' */
80 wpos += m_strputc(buf + wpos, len - wpos, '#');
84 while (isalnum(sender[rpos + count]) && rpos + count < userlen)
86 while (!isalnum(sender[rpos + count]) && rpos + count < userlen)
88 wpos += m_strncpy(buf + wpos, len - wpos, sender + rpos, count);
92 wpos += m_strputc(buf + wpos, len - wpos, '#');
93 wpos += m_strcpy(buf + wpos, len - wpos, at + 1);
98 c_net(const char *c_addr, const char *c_name, char *cnet, int cnetlen)
103 if (cfg.lookup_by_host)
106 if (!(dot = strchr(c_addr, '.')))
108 if (!(dot = strchr(dot + 1, '.')))
112 if (!(dot = strchr(dot, '.')) || dot - p > 3)
114 m_strncpy(ip2, sizeof(ip2), p, dot - p);
117 if (!(dot = strchr(dot, '.')) || dot - p > 3)
119 m_strncpy(ip3, sizeof(ip3), p, dot - p);
121 /* skip if contains the last two ip numbers in the hostname,
122 we assume it's a pool of dialup of a provider */
123 if (strstr(c_name, ip2) && strstr(c_name, ip3))
126 m_strncpy(cnet, cnetlen, c_addr, dot - c_addr);
130 bool try_greylist(const char *sender, const char *c_addr,
131 const char *c_name, const char *rcpt)
133 char sbuf[BUFSIZ], cnet[64], key[BUFSIZ];
136 time_t now = time(NULL);
137 struct obj_entry oent = { now, now };
138 struct awl_entry aent = { 0, 0 };
140 int len, klen, c_addrlen = strlen(c_addr);
144 res = tcbdbget3(cfg.awl_db, c_addr, c_addrlen, &len);
145 if (res && len == sizeof(aent)) {
146 memcpy(&aent, res, len);
148 if (aent.count > cfg.awl_count) {
149 if (now < aent.last + 3600)
155 klen = snprintf(key, sizeof(key), "%s/%s/%s",
156 c_net(c_addr, c_name, cnet, sizeof(cnet)),
157 sender_normalize(sender, sbuf, sizeof(sbuf)), rcpt);
158 klen = MIN(klen, ssizeof(key) - 1);
160 res = tcbdbget3(cfg.obj_db, key, klen, &len);
161 if (res && len == sizeof(oent)) {
162 memcpy(&oent, res, len);
165 if (oent.last - oent.first < cfg.delay
166 && now - oent.first > cfg.retry_window)
171 tcbdbput(cfg.obj_db, key, klen, &oent, sizeof(oent));
172 if (oent.first + cfg.delay < now) {
177 tcbdbput(cfg.awl_db, c_addr, c_addrlen, &aent, sizeof(aent));