Configuration reloader for postlicyd.

[apps/pfixtools.git] / postlicyd / config.c

diff --git a/postlicyd/config.c b/postlicyd/config.c
index 21e49d1..7ea485c 100644 (file)
--- a/postlicyd/config.c
+++ b/postlicyd/config.c
@@ -34,28 +34,63 @@
  */
 
 #include "file.h"
-#include "filter.h"
 #include "config.h"
 #include "str.h"
 
-struct config_t {
-    A(filter_t)        filters;
-    A(filter_params_t) params;
-    int entry_point;
-};
+#define config_param_register(Param)
+
+/* Filter to execute on "CONNECT"
+ */
+config_param_register("client_filter");
+
+/* Filter to execute on "MAIL FROM"
+ */
+config_param_register("sender_filter");
+
+/* Filter to execute on "RCPT TO"
+ */
+config_param_register("recipient_filter");
+
+/* Filter to execute on "DATA"
+ */
+config_param_register("data_filter");
+
+/* Filter to execute on "END-OF-DATA"
+ */
+config_param_register("end_of_data_filter");
+
+/* Filter to execute on "ETRN"
+ */
+config_param_register("etrn_filter");
+
+/* Filter to execute on "HELO"
+ */
+config_param_register("helo_filter");
+config_param_register("ehlo_filter");
+
+/* Filter to execute on "VRFY"
+ */
+config_param_register("verify_filter");
 
 static inline config_t *config_new(void)
 {
     config_t *config = p_new(config_t, 1);
-    config->entry_point = -1;
     return config;
 }
 
+static void config_close(config_t *config)
+{
+    for (int i = 0 ; i < SMTP_count ; ++i) {
+        config->entry_points[i] = -1;
+    }
+    array_deep_wipe(config->filters, filter_wipe);
+    array_deep_wipe(config->params, filter_params_wipe);
+}
+
 void config_delete(config_t **config)
 {
     if (*config) {
-        array_deep_wipe((*config)->filters, filter_wipe);
-        array_deep_wipe((*config)->params, filter_params_wipe);
+        config_close(*config);
         p_delete(config);
     }
 }
@@ -78,13 +113,46 @@ static bool config_second_pass(config_t *config)
             break;
         }
     }}
+    if (!ok) {
+        return false;
+    }
+    if (!filter_check_safety(&config->filters)) {
+        return false;
+    }
+
+    ok = false;
+    foreach (filter_param_t *param, config->params) {
+        switch (param->type) {
+#define   CASE(Param, State)                                                   \
+            case ATK_ ## Param ## _FILTER:                                     \
+              ok = true;                                                       \
+              config->entry_points[SMTP_ ## State]                             \
+                  = filter_find_with_name(&config->filters, param->value);     \
+              break;
+          CASE(CLIENT,      CONNECT)
+          CASE(EHLO,        EHLO)
+          CASE(HELO,        HELO)
+          CASE(SENDER,      MAIL)
+          CASE(RECIPIENT,   RCPT)
+          CASE(DATA,        DATA)
+          CASE(END_OF_DATA, END_OF_MESSAGE)
+          CASE(VERIFY,      VRFY)
+          CASE(ETRN,        ETRN)
+#undef    CASE
+          default: break;
+        }
+    }}
+    array_deep_wipe(config->params, filter_params_wipe);
+
+    if (!ok) {
+        syslog(LOG_ERR, "no entry point defined");
+    }
 
     return ok;
 }
 
-config_t *config_read(const char *file)
+static bool config_load(config_t *config)
 {
-    config_t *config;
     filter_t filter;
     file_map_t map;
     const char *p;
@@ -95,18 +163,18 @@ config_t *config_read(const char *file)
     char value[BUFSIZ];
     ssize_t key_len, value_len;
 
-    if (!file_map_open(&map, file, false)) {
+    if (!file_map_open(&map, config->filename, false)) {
         return false;
     }
 
-    config = config_new();
+    config_close(config);
     filter_init(&filter);
     linep = p = map.map;
 
 #define READ_ERROR(Fmt, ...)                                                   \
     do {                                                                       \
-        syslog(LOG_ERR, "config file %s:%d:%d: " Fmt, file, line + 1,          \
-               p - linep + 1, ##__VA_ARGS__);                                  \
+        syslog(LOG_ERR, "config file %s:%d:%d: " Fmt, config->filename,        \
+               line + 1, p - linep + 1, ##__VA_ARGS__);                        \
         goto error;                                                            \
     } while (0)
 #define ADD_IN_BUFFER(Buffer, Len, Char)                                       \
@@ -203,6 +271,9 @@ config_t *config_read(const char *file)
             if (escaped) {                                                     \
                 ADD_IN_BUFFER(Buffer, Len, '\\');                              \
             }                                                                  \
+            while ((Len) > 0 && isspace((Buffer)[(Len) - 1])) {                \
+                (Buffer)[--(Len)] = '\0';                                      \
+            }                                                                  \
         }                                                                      \
         READ_NEXT(OnEOF);                                                      \
     } while(0)
@@ -234,10 +305,13 @@ read_param_value:
     READ_BLANK(goto badeof);
     READ_STRING("parameter value", value, value_len, ;);
     {
-        filter_params_t param;
-        param.name = m_strdup(key);
-        param.value = m_strdup(value);
-        array_add(config->params, param);
+        filter_param_t param;
+        param.type  = param_tokenize(key, key_len);
+        if (param.type != ATK_UNKNOWN) {
+            param.value     = p_dupstr(value, value_len);
+            param.value_len = value_len;
+            array_add(config->params, param);
+        }
     }
     goto read_section;
 
@@ -266,9 +340,10 @@ read_filter:
                            key + 3, filter.name);
             }
         } else {
-            if (!filter_add_param(&filter, key, key_len, value, value_len)) {
-                goto error;
-            }
+            /* filter_add_param failure mean unknown type or unsupported type.
+             * this are non-fatal errors.
+             */
+            (void)filter_add_param(&filter, key, key_len, value, value_len);
         }
     }
     READ_NEXT(;);
@@ -284,14 +359,31 @@ ok:
         goto error;
     }
     file_map_close(&map);
-    return config;
+    return true;
 
 badeof:
     syslog(LOG_ERR, "Unexpected end of file");
 
 error:
-    filter_wipe(&filter);
-    config_delete(&config);
+    if (filter.name) {
+        filter_wipe(&filter);
+    }
     file_map_close(&map);
-    return NULL;
+    return false;
+}
+
+bool config_reload(config_t *config)
+{
+    return config_load(config);
+}
+
+config_t *config_read(const char *file)
+{
+    config_t *config = config_new();
+    config->filename = file;
+    if (!config_reload(config)) {
+        p_delete(&config);
+        return NULL;
+    }
+    return config;
 }