Asynchronous DNS queries on iplist.

[apps/pfixtools.git] / postlicyd / main-postlicyd.c

diff --git a/postlicyd/main-postlicyd.c b/postlicyd/main-postlicyd.c
index 751ff5a..48233e0 100644 (file)
--- a/postlicyd/main-postlicyd.c
+++ b/postlicyd/main-postlicyd.c
@@ -41,8 +41,8 @@
 #include "epoll.h"
 #include "policy_tokens.h"
 #include "server.h"
-#include "query.h"
 #include "config.h"
+#include "postlicyd.h"
 
 #define DAEMON_NAME             "postlicyd"
 #define DAEMON_VERSION          "0.2"
@@ -52,21 +52,36 @@
 
 DECLARE_MAIN
 
+static config_t *config = NULL;
+
+
 static void *query_starter(server_t* server)
 {
-    return query_new();
+    query_context_t *context = p_new(query_context_t, 1);
+    filter_context_prepare(&context->context, context);
+    return context;
+}
+
+static void query_stopper(void *data)
+{
+    query_context_t **context = data;
+    if (*context) {
+        filter_context_wipe(&(*context)->context);
+        p_delete(context);
+    }
 }
 
-static bool config_refresh(void *config)
+static bool config_refresh(void *mconfig)
 {
-    return config_reload(config);
+    return config_reload(mconfig);
 }
 
 __attribute__((format(printf,2,0)))
 static void policy_answer(server_t *pcy, const char *fmt, ...)
 {
     va_list args;
-    const query_t* query = pcy->data;
+    query_context_t *context = pcy->data;
+    const query_t* query = &context->query;
 
     buffer_addstr(&pcy->obuf, "action=");
     va_start(args, fmt);
@@ -77,23 +92,37 @@ static void policy_answer(server_t *pcy, const char *fmt, ...)
     epoll_modify(pcy->fd, EPOLLIN | EPOLLOUT, pcy);
 }
 
-static bool policy_process(server_t *pcy, const config_t *config)
+static bool policy_process(server_t *pcy, const config_t *mconfig)
 {
-    const query_t* query = pcy->data;
+    query_context_t *context = pcy->data;
+    const query_t* query = &context->query;
     const filter_t *filter;
-    if (config->entry_points[query->state] == -1) {
+    if (mconfig->entry_points[query->state] == -1) {
         warn("no filter defined for current protocol_state (%d)", query->state);
         return false;
     }
-    filter = array_ptr(config->filters, config->entry_points[query->state]);
+    if (context->context.current_filter != NULL) {
+        filter = context->context.current_filter;
+    } else {
+        filter = array_ptr(mconfig->filters, mconfig->entry_points[query->state]);
+    }
+    context->context.current_filter = NULL;
     while (true) {
-        const filter_hook_t *hook = filter_run(filter, query);
+        const filter_hook_t *hook = filter_run(filter, query, &context->context);
         if (hook == NULL) {
             warn("request client=%s, from=<%s>, to=<%s>: aborted",
                  query->client_name,
                  query->sender == NULL ? "undefined" : query->sender,
                  query->recipient == NULL ? "undefined" : query->recipient);
             return false;
+        } else if (hook->async) {
+            debug("request client=%s, from=<%s>, to=<%s>: "
+                  "asynchronous filter from filter %s",
+                   query->client_name,
+                   query->sender == NULL ? "undefined" : query->sender,
+                   query->recipient == NULL ? "undefined" : query->recipient,
+                   filter->name);
+            return true;
         } else if (hook->postfix) {
             info("request client=%s, from=<%s>, to=<%s>: "
                  "awswer %s from filter %s: \"%s\"",
@@ -104,14 +133,14 @@ static bool policy_process(server_t *pcy, const config_t *config)
             policy_answer(pcy, "%s", hook->value);
             return true;
         } else {
-            notice("request client=%s, from=<%s>, to=<%s>: "
+            debug("request client=%s, from=<%s>, to=<%s>: "
                    "awswer %s from filter %s: next filter %s",
                    query->client_name,
                    query->sender == NULL ? "undefined" : query->sender,
                    query->recipient == NULL ? "undefined" : query->recipient,
                    htokens[hook->type], filter->name,
-                   (array_ptr(config->filters, hook->filter_id))->name);
-            filter = array_ptr(config->filters, hook->filter_id);
+                   (array_ptr(mconfig->filters, hook->filter_id))->name);
+            filter = array_ptr(mconfig->filters, hook->filter_id);
         }
     }
 }
@@ -121,8 +150,10 @@ static int policy_run(server_t *pcy, void* vconfig)
     int search_offs = MAX(0, (int)(pcy->ibuf.len - 1));
     int nb = buffer_read(&pcy->ibuf, pcy->fd, -1);
     const char *eoq;
-    query_t  *query  = pcy->data;
-    const config_t *config = vconfig;
+    query_context_t *context = pcy->data;
+    query_t  *query  = &context->query;
+    context->server = pcy;
+    const config_t *mconfig = vconfig;
 
     if (nb < 0) {
         if (errno == EAGAIN || errno == EINTR)
@@ -143,8 +174,37 @@ static int policy_run(server_t *pcy, void* vconfig)
         return -1;
     query->eoq = eoq + strlen("\n\n");
     epoll_modify(pcy->fd, 0, pcy);
-    return policy_process(pcy, config) ? 0 : -1;
+    return policy_process(pcy, mconfig) ? 0 : -1;
+}
+
+static void policy_async_handler(filter_context_t *context,
+                                 const filter_hook_t *hook)
+{
+    const filter_t *filter = context->current_filter;
+    query_context_t *qctx  = context->data;
+    query_t         *query = &qctx->query;
+    server_t        *server = qctx->server;
+
+    debug("request client=%s, from=<%s>, to=<%s>: "
+           "awswer %s from filter %s: next filter %s",
+           query->client_name,
+           query->sender == NULL ? "undefined" : query->sender,
+           query->recipient == NULL ? "undefined" : query->recipient,
+           htokens[hook->type], filter->name,
+           (array_ptr(config->filters, hook->filter_id))->name);
+    context->current_filter = array_ptr(config->filters, hook->filter_id);
+
+    if (!policy_process(server, config)) {
+        server_release(server);
+    }
+}
+
+static int postlicyd_init(void)
+{
+    filter_async_handler_register(policy_async_handler);
+    return 0;
 }
+module_init(postlicyd_init);
 
 int start_listener(int port)
 {
@@ -221,7 +281,7 @@ int main(int argc, char *argv[])
         return EXIT_FAILURE;
     }
 
-    config_t *config = config_read(argv[optind]);
+    config = config_read(argv[optind]);
     if (config == NULL) {
         return EXIT_FAILURE;
     }
@@ -239,7 +299,7 @@ int main(int argc, char *argv[])
     if (start_listener(config->port) < 0) {
         return EXIT_FAILURE;
     } else {
-        return server_loop(query_starter, (delete_client_t)query_delete,
+        return server_loop(query_starter, query_stopper,
                            policy_run, config_refresh, config);
     }
 }