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 © 2008 Florent Bruneau
40 #define config_param_register(Param)
42 /* Filter to execute on "CONNECT"
44 config_param_register("client_filter");
46 /* Filter to execute on "MAIL FROM"
48 config_param_register("sender_filter");
50 /* Filter to execute on "RCPT TO"
52 config_param_register("recipient_filter");
54 /* Filter to execute on "DATA"
56 config_param_register("data_filter");
58 /* Filter to execute on "END-OF-DATA"
60 config_param_register("end_of_data_filter");
62 /* Filter to execute on "ETRN"
64 config_param_register("etrn_filter");
66 /* Filter to execute on "HELO"
68 config_param_register("helo_filter");
69 config_param_register("ehlo_filter");
71 /* Filter to execute on "VRFY"
73 config_param_register("verify_filter");
76 /* Where to bind the server.
78 config_param_register("port");
80 static inline config_t *config_new(void)
82 config_t *config = p_new(config_t, 1);
86 static void config_close(config_t *config)
88 for (int i = 0 ; i < SMTP_count ; ++i) {
89 config->entry_points[i] = -1;
91 array_deep_wipe(config->filters, filter_wipe);
92 array_deep_wipe(config->params, filter_params_wipe);
95 void config_delete(config_t **config)
98 config_close(*config);
104 static bool config_second_pass(config_t *config)
107 if (config->filters.len > 0) {
108 # define QSORT_TYPE filter_t
109 # define QSORT_BASE config->filters.data
110 # define QSORT_NELT config->filters.len
111 # define QSORT_LT(a,b) strcmp(a->name, b->name) < 0
115 foreach (filter_t *filter, config->filters) {
116 if (!filter_update_references(filter, &config->filters)) {
124 if (!filter_check_safety(&config->filters)) {
129 #define PARSE_CHECK(Expr, Fmt, ...) \
131 err(Fmt, ##__VA_ARGS__); \
134 foreach (filter_param_t *param, config->params) {
135 switch (param->type) {
136 #define CASE(Param, State) \
137 case ATK_ ## Param ## _FILTER: \
139 config->entry_points[SMTP_ ## State] \
140 = filter_find_with_name(&config->filters, param->value); \
141 PARSE_CHECK(config->entry_points[SMTP_ ## State] >= 0, \
142 "invalid filter name %s", param->value); \
144 CASE(CLIENT, CONNECT)
148 CASE(RECIPIENT, RCPT)
150 CASE(END_OF_DATA, END_OF_MESSAGE)
154 FILTER_PARAM_PARSE_INT(PORT, config->port);
158 array_deep_wipe(config->params, filter_params_wipe);
161 err("no entry point defined");
167 static bool config_load(config_t *config)
174 bool in_section = false;
175 bool end_of_section = false;
179 ssize_t key_len, value_len;
181 if (!file_map_open(&map, config->filename, false)) {
185 config_close(config);
186 filter_init(&filter);
189 #define READ_LOG(Lev, Fmt, ...) \
190 __log(LOG_ ## Lev, "config file %s:%d:%d: " Fmt, config->filename, \
191 line + 1, p - linep + 1, ##__VA_ARGS__)
192 #define READ_ERROR(Fmt, ...) \
194 READ_LOG(ERR, Fmt, ##__VA_ARGS__); \
197 #define ADD_IN_BUFFER(Buffer, Len, Char) \
199 if ((Len) >= BUFSIZ - 1) { \
200 READ_ERROR("unreasonnable long line"); \
202 (Buffer)[(Len)++] = (Char); \
203 (Buffer)[(Len)] = '\0'; \
211 if (++p >= map.end) { \
212 if (!end_of_section) { \
223 bool in_comment = false; \
224 while (in_comment || isspace(*p) || *p == '#') { \
226 in_comment = false; \
227 } else if (*p == '#') { \
233 #define READ_TOKEN(Name, Buffer, Len) \
236 (Buffer)[0] = '\0'; \
237 if (!isalpha(*p)) { \
238 READ_ERROR("invalid %s, unexpected character '%c'", Name, *p); \
241 ADD_IN_BUFFER(Buffer, Len, *p); \
243 } while (isalnum(*p) || *p == '_'); \
245 #define READ_STRING(Name, Buffer, Len, Ignore) \
248 (Buffer)[0] = '\0'; \
250 bool escaped = false; \
251 while (*p == '"') { \
255 READ_ERROR("string must not contain EOL"); \
256 } else if (escaped) { \
257 ADD_IN_BUFFER(Buffer, Len, *p); \
259 } else if (*p == '\\') { \
261 } else if (*p == '"') { \
265 ADD_IN_BUFFER(Buffer, Len, *p); \
272 READ_ERROR("%s must end with a ';'", Name); \
275 bool escaped = false; \
276 while (*p != ';' && isascii(*p) && (isprint(*p) || isspace(*p))) { \
278 if (*p == '\r' || *p == '\n') { \
281 ADD_IN_BUFFER(Buffer, Len, '\\'); \
287 } else if (*p == '\r' || *p == '\n') { \
288 READ_ERROR("%s must not contain EOL", Name); \
290 ADD_IN_BUFFER(Buffer, Len, *p); \
295 ADD_IN_BUFFER(Buffer, Len, '\\'); \
297 while ((Len) > 0 && isspace((Buffer)[(Len) - 1])) { \
298 (Buffer)[--(Len)] = '\0'; \
301 end_of_section = Ignore; \
311 value[0] = key[0] = '\0';
312 value_len = key_len = 0;
314 in_section = end_of_section = false;
317 READ_TOKEN("section name", key, key_len);
322 goto read_param_value;
327 READ_ERROR("invalid character '%c', expected '=' or '{'", *p);
332 READ_STRING("parameter value", value, value_len, true);
334 filter_param_t param;
335 param.type = param_tokenize(key, key_len);
336 if (param.type != ATK_UNKNOWN) {
337 param.value = p_dupstr(value, value_len);
338 param.value_len = value_len;
339 array_add(config->params, param);
341 READ_LOG(INFO, "unknown parameter %.*s", key_len, key);
347 filter_set_name(&filter, key, key_len);
350 READ_TOKEN("filter parameter name", key, key_len);
353 READ_ERROR("invalid character '%c', expected '='", *p);
357 READ_STRING("filter parameter value", value, value_len, false);
359 if (strcmp(key, "type") == 0) {
360 if (!filter_set_type(&filter, value, value_len)) {
361 READ_ERROR("unknow filter type (%s) for filter %s",
364 } else if (key_len > 3 && strncmp(key, "on_", 3) == 0) {
365 if (!filter_add_hook(&filter, key + 3, key_len - 3,
367 READ_ERROR("hook %s not supported by filter %s",
368 key + 3, filter.name);
371 /* filter_add_param failure mean unknown type or unsupported type.
372 * this are non-fatal errors.
374 (void)filter_add_param(&filter, key, key_len, value, value_len);
377 end_of_section = true;
379 if (!filter_build(&filter)) {
380 READ_ERROR("invalid filter %s", filter.name);
382 array_add(config->filters, filter);
383 filter_init(&filter);
387 if (!config_second_pass(config)) {
390 file_map_close(&map);
394 err("Unexpected end of file");
398 filter_wipe(&filter);
400 file_map_close(&map);
404 bool config_reload(config_t *config)
406 return config_load(config);
409 config_t *config_read(const char *file)
411 config_t *config = config_new();
412 config->filename = file;
413 if (!config_reload(config)) {