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
42 #include "policy_tokens.h"
45 #include "postlicyd.h"
47 #define DAEMON_NAME "postlicyd"
48 #define DAEMON_VERSION "0.2"
49 #define DEFAULT_PORT 10000
50 #define RUNAS_USER "nobody"
51 #define RUNAS_GROUP "nogroup"
55 static void *query_starter(server_t* server)
57 query_context_t *context = p_new(query_context_t, 1);
58 filter_context_prepare(&context->context, context);
62 static void query_stopper(void *data)
64 query_context_t **context = data;
66 filter_context_wipe(&(*context)->context);
71 static bool config_refresh(void *config)
73 return config_reload(config);
76 __attribute__((format(printf,2,0)))
77 static void policy_answer(server_t *pcy, const char *fmt, ...)
80 query_context_t *context = pcy->data;
81 const query_t* query = &context->query;
83 buffer_addstr(&pcy->obuf, "action=");
85 buffer_addvf(&pcy->obuf, fmt, args);
87 buffer_addstr(&pcy->obuf, "\n\n");
88 buffer_consume(&pcy->ibuf, query->eoq - pcy->ibuf.data);
89 epoll_modify(pcy->fd, EPOLLIN | EPOLLOUT, pcy);
92 static bool policy_process(server_t *pcy, const config_t *config)
94 query_context_t *context = pcy->data;
95 const query_t* query = &context->query;
96 const filter_t *filter;
97 if (config->entry_points[query->state] == -1) {
98 warn("no filter defined for current protocol_state (%d)", query->state);
101 if (context->context.current_filter != NULL) {
102 filter = context->context.current_filter;
104 filter = array_ptr(config->filters, config->entry_points[query->state]);
107 const filter_hook_t *hook = filter_run(filter, query, &context->context);
109 warn("request client=%s, from=<%s>, to=<%s>: aborted",
111 query->sender == NULL ? "undefined" : query->sender,
112 query->recipient == NULL ? "undefined" : query->recipient);
114 } else if (hook->async) {
115 debug("request client=%s, from=<%s>, to=<%s>: "
116 "asynchronous filter from filter %s",
118 query->sender == NULL ? "undefined" : query->sender,
119 query->recipient == NULL ? "undefined" : query->recipient,
122 } else if (hook->postfix) {
123 info("request client=%s, from=<%s>, to=<%s>: "
124 "awswer %s from filter %s: \"%s\"",
126 query->sender == NULL ? "undefined" : query->sender,
127 query->recipient == NULL ? "undefined" : query->recipient,
128 htokens[hook->type], filter->name, hook->value);
129 policy_answer(pcy, "%s", hook->value);
132 debug("request client=%s, from=<%s>, to=<%s>: "
133 "awswer %s from filter %s: next filter %s",
135 query->sender == NULL ? "undefined" : query->sender,
136 query->recipient == NULL ? "undefined" : query->recipient,
137 htokens[hook->type], filter->name,
138 (array_ptr(config->filters, hook->filter_id))->name);
139 filter = array_ptr(config->filters, hook->filter_id);
144 static int policy_run(server_t *pcy, void* vconfig)
146 int search_offs = MAX(0, (int)(pcy->ibuf.len - 1));
147 int nb = buffer_read(&pcy->ibuf, pcy->fd, -1);
149 query_context_t *context = pcy->data;
150 query_t *query = &context->query;
151 const config_t *config = vconfig;
154 if (errno == EAGAIN || errno == EINTR)
161 err("unexpected end of data");
165 if (!(eoq = strstr(pcy->ibuf.data + search_offs, "\n\n")))
168 if (!query_parse(pcy->data, pcy->ibuf.data))
170 query->eoq = eoq + strlen("\n\n");
171 epoll_modify(pcy->fd, 0, pcy);
172 return policy_process(pcy, config) ? 0 : -1;
175 static bool policy_event(server_t *event, void *config)
177 if (!policy_process(event, config)) {
178 server_release(event);
184 int start_listener(int port)
186 return start_server(port, NULL, NULL);
189 /* administrivia {{{ */
193 fputs("usage: "DAEMON_NAME" [options] config\n"
196 " -l <port> port to listen to\n"
197 " -p <pidfile> file to write our pid to\n"
198 " -f stay in foreground\n"
199 " -d grow logging level\n"
200 " -u unsafe mode (don't drop privileges)\n"
206 int main(int argc, char *argv[])
209 const char *pidfile = NULL;
210 bool daemonize = true;
211 int port = DEFAULT_PORT;
212 bool port_from_cli = false;
214 for (int c = 0; (c = getopt(argc, argv, "ufd" "l:p:")) >= 0; ) {
224 port_from_cli = true;
242 if (argc - optind != 1) {
247 info("starting %s v%s...", DAEMON_NAME, DAEMON_VERSION);
249 if (pidfile_open(pidfile) < 0) {
250 crit("unable to write pidfile %s", pidfile);
254 if (drop_privileges(RUNAS_USER, RUNAS_GROUP) < 0) {
255 crit("unable to drop privileges");
259 config_t *config = config_read(argv[optind]);
260 if (config == NULL) {
263 if (port_from_cli || config->port == 0) {
267 if (daemonize && daemon_detach() < 0) {
268 crit("unable to fork");
274 if (start_listener(config->port) < 0) {
277 return server_loop(query_starter, query_stopper,
278 policy_run, policy_event, config_refresh, config);