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 © 2006-2007 Pierre Habouzit
34 * Copyright © 2008 Florent Bruneau
45 #define DAEMON_NAME "postlicyd"
46 #define DEFAULT_PORT 10000
47 #define RUNAS_USER "nobody"
48 #define RUNAS_GROUP "nogroup"
56 SMTP_HELO = SMTP_EHLO,
65 /* \see http://www.postfix.org/SMTPD_POLICY_README.html */
66 typedef struct query_t {
70 const char *helo_name;
73 const char *recipient;
74 const char *recipient_count;
75 const char *client_address;
76 const char *client_name;
77 const char *reverse_client_name;
81 const char *sasl_method;
82 const char *sasl_username;
83 const char *sasl_sender;
85 const char *ccert_subject;
86 const char *ccert_issuer;
87 const char *ccsert_fingerprint;
90 const char *encryption_protocol;
91 const char *encryption_cipher;
92 const char *encryption_keysize;
93 const char *etrn_domain;
98 static query_t *query_new(void)
100 return p_new(query_t, 1);
103 static void query_delete(query_t **query)
110 static void *query_starter(server_t* server)
115 static int postfix_parsejob(query_t *query, char *p)
117 #define PARSE_CHECK(expr, error, ...) \
120 syslog(LOG_ERR, error, ##__VA_ARGS__); \
132 p = strchr(k = p, '=');
133 PARSE_CHECK(p, "could not find '=' in line");
134 for (klen = p - k; klen && isblank(k[klen]); klen--);
139 p = strchr(v = p, '\n');
140 PARSE_CHECK(p, "could not find final \\n in line");
141 for (vlen = p - v; vlen && isblank(v[vlen]); vlen--);
142 p += 1; /* skip \n */
144 vtk = tokenize(v, vlen);
145 switch (tokenize(k, klen)) {
146 #define CASE(up, low) case PTK_##up: query->low = v; v[vlen] = '\0'; break;
147 CASE(HELO_NAME, helo_name);
148 CASE(QUEUE_ID, queue_id);
149 CASE(SENDER, sender);
150 CASE(RECIPIENT, recipient);
151 CASE(RECIPIENT_COUNT, recipient_count);
152 CASE(CLIENT_ADDRESS, client_address);
153 CASE(CLIENT_NAME, client_name);
154 CASE(REVERSE_CLIENT_NAME, reverse_client_name);
155 CASE(INSTANCE, instance);
156 CASE(SASL_METHOD, sasl_method);
157 CASE(SASL_USERNAME, sasl_username);
158 CASE(SASL_SENDER, sasl_sender);
160 CASE(CCERT_SUBJECT, ccert_subject);
161 CASE(CCERT_ISSUER, ccert_issuer);
162 CASE(CCSERT_FINGERPRINT, ccsert_fingerprint);
163 CASE(ENCRYPTION_PROTOCOL, encryption_protocol);
164 CASE(ENCRYPTION_CIPHER, encryption_cipher);
165 CASE(ENCRYPTION_KEYSIZE, encryption_keysize);
166 CASE(ETRN_DOMAIN, etrn_domain);
170 PARSE_CHECK(vtk == PTK_SMTPD_ACCESS_POLICY,
171 "unexpected `request' value: %.*s", vlen, v);
174 case PTK_PROTOCOL_NAME:
175 PARSE_CHECK(vtk == PTK_SMTP || vtk == PTK_ESMTP,
176 "unexpected `protocol_name' value: %.*s", vlen, v);
177 query->esmtp = vtk == PTK_ESMTP;
180 case PTK_PROTOCOL_STATE:
182 #define CASE(name) case PTK_##name: query->state = SMTP_##name; break;
189 CASE(END_OF_MESSAGE);
193 PARSE_CHECK(false, "unexpected `protocol_state` value: %.*s",
200 syslog(LOG_WARNING, "unexpected key, skipped: %.*s", klen, k);
205 return query->state == SMTP_UNKNOWN ? -1 : 0;
209 __attribute__((format(printf,2,0)))
210 static void policy_answer(server_t *pcy, const char *fmt, ...)
214 buffer_addvf(&pcy->obuf, fmt, args);
216 buffer_addstr(&pcy->obuf, "\n\n");
217 buffer_consume(&pcy->ibuf, ((query_t*)(pcy->data))->eoq - pcy->ibuf.data);
218 epoll_modify(pcy->fd, EPOLLIN | EPOLLOUT, pcy);
221 static void policy_process(server_t *pcy)
223 policy_answer(pcy, "DUNNO");
226 static int policy_run(server_t *pcy, void* config)
228 ssize_t search_offs = MAX(0, pcy->ibuf.len - 1);
229 int nb = buffer_read(&pcy->ibuf, pcy->fd, -1);
233 if (errno == EAGAIN || errno == EINTR)
240 syslog(LOG_ERR, "unexpected end of data");
244 if (!(eoq = strstr(pcy->ibuf.data + search_offs, "\n\n")))
247 if (postfix_parsejob(pcy->data, pcy->ibuf.data) < 0)
249 ((query_t*)pcy->data)->eoq = eoq + strlen("\n\n");
250 epoll_modify(pcy->fd, 0, pcy);
255 int start_listener(int port)
257 return start_server(port, NULL, NULL);
260 /* administrivia {{{ */
264 fputs("usage: "DAEMON_NAME" [options] config\n"
267 " -l <port> port to listen to\n"
268 " -p <pidfile> file to write our pid to\n"
269 " -f stay in foreground\n"
275 int main(int argc, char *argv[])
277 const char *pidfile = NULL;
278 bool daemonize = true;
279 int port = DEFAULT_PORT;
281 for (int c = 0; (c = getopt(argc, argv, "hf" "l:p:")) >= 0; ) {
298 if (argc - optind != 1) {
303 if (common_setup(pidfile, false, RUNAS_USER, RUNAS_GROUP, daemonize)
308 if (start_listener(port) < 0)
311 return server_loop(query_starter, (delete_client_t)query_delete,