1 /******************************************************************************/
2 /* postlicyd: a postfix policy daemon with a lot of features */
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
36 #include "postlicyd.h"
43 #define ishspace(c) ((c) == ' ' || (c) == '\t')
45 typedef struct jpriv_t {
51 static jpriv_t *postfix_jpriv_init(jpriv_t *jp)
53 buffer_init(&jp->ibuf);
54 buffer_init(&jp->obuf);
55 query_init(&jp->query);
58 static void postfix_jpriv_wipe(jpriv_t *jp)
60 query_wipe(&jp->query);
61 buffer_wipe(&jp->ibuf);
62 buffer_wipe(&jp->obuf);
64 DO_NEW(jpriv_t, postfix_jpriv);
65 DO_DELETE(jpriv_t, postfix_jpriv);
67 static int postfix_parsejob(query_t *query)
69 #define PARSE_CHECK(expr, error, ...) \
72 syslog(LOG_ERR, error, ##__VA_ARGS__); \
77 char *p = vskipspaces(query->data.data);
85 p = strchr(k = p, '=');
86 PARSE_CHECK(p, "could not find '=' in line");
87 for (klen = p - k; klen && ishspace(k[klen]); klen--);
92 p = strstr(v = p, "\r\n");
93 PARSE_CHECK(p, "could not find final \\r\\n in line");
94 for (vlen = p - v; vlen && ishspace(v[vlen]); vlen--);
95 p += 2; /* skip \r\n */
97 vtk = tokenize(v, vlen);
98 switch (tokenize(k, klen)) {
99 #define CASE(up, low) case PTK_##up: query->low = v; v[vlen] = '\0'; break;
100 CASE(HELO_NAME, helo_name);
101 CASE(QUEUE_ID, queue_id);
102 CASE(SENDER, sender);
103 CASE(RECIPIENT, recipient);
104 CASE(RECIPIENT_COUNT, recipient_count);
105 CASE(CLIENT_ADDRESS, client_address);
106 CASE(CLIENT_NAME, client_name);
107 CASE(RCLIENT_NAME, rclient_name);
108 CASE(INSTANCE, instance);
109 CASE(SASL_METHOD, sasl_method);
110 CASE(SASL_USERNAME, sasl_username);
111 CASE(SASL_SENDER, sasl_sender);
113 CASE(CCERT_SUBJECT, ccert_subject);
114 CASE(CCERT_ISSUER, ccert_issuer);
115 CASE(CCSERT_FINGERPRINT, ccsert_fingerprint);
116 CASE(ENCRYPTION_PROTOCOL, encryption_protocol);
117 CASE(ENCRYPTION_CIPHER, encryption_cipher);
118 CASE(ENCRYPTION_KEYSIZE, encryption_keysize);
119 CASE(ETRN_DOMAIN, etrn_domain);
123 PARSE_CHECK(vtk == PTK_SMTPD_ACCESS_POLICY,
124 "unexpected `request' value: %.*s", vlen, v);
127 case PTK_PROTOCOL_NAME:
128 PARSE_CHECK(vtk == PTK_SMTP || vtk == PTK_ESMTP,
129 "unexpected `protocol_name' value: %.*s", vlen, v);
130 query->esmtp = vtk == PTK_ESMTP;
133 case PTK_PROTOCOL_STATE:
135 #define CASE(name) case PTK_##name: query->state = SMTP_##name; break;
142 CASE(END_OF_MESSAGE);
146 PARSE_CHECK(false, "unexpected `protocol_state` value: %.*s",
157 return query->state == SMTP_UNKNOWN ? -1 : 0;
162 static void postfix_process(job_t *job)
169 if ((job = job_accept(job, JOB_READ))) {
170 job->jdata = postfix_jpriv_new();
171 job->process = &postfix_process;
172 job->stop = &postfix_stop;
177 nb = write(job->fd, job->jdata->obuf.data, job->jdata->obuf.len);
179 if ((job->error = errno != EINTR && errno != EAGAIN)) {
180 syslog(LOG_ERR, "unexpected problem on the socket: %m");
185 buffer_consume(&job->jdata->obuf, nb);
186 if (job->jdata->obuf.len)
192 nb = buffer_read(&job->jdata->ibuf, job->fd, -1);
194 if ((job->error = errno != EINTR && errno != EAGAIN)) {
195 syslog(LOG_ERR, "unexpected problem on the socket: %m");
200 syslog(LOG_ERR, "unexpected eof");
205 p = strstr(skipspaces(job->jdata->ibuf.data), "\r\n\r\n");
207 if (job->jdata->ibuf.len > SHRT_MAX) {
208 syslog(LOG_ERR, "too much data without CRLFCRLF");
215 query_reset(&job->jdata->query);
216 buffer_add(&job->jdata->query.data, job->jdata->ibuf.data,
217 p - 2 - job->jdata->ibuf.data);
218 buffer_consume(&job->jdata->query.data, p - job->jdata->ibuf.data);
220 if (postfix_parsejob(&job->jdata->query) < 0) {
225 /* TODO: run the scenario */