From 86bf8f7a016cfd8475ffc363a4cac0a29a4aacfd Mon Sep 17 00:00:00 2001
From: Florent Bruneau <florent.bruneau@polytechnique.org>
Date: Mon, 15 Sep 2008 16:46:29 +0200
Subject: [PATCH] Implements filter runner.

Signed-off-by: Florent Bruneau <florent.bruneau@polytechnique.org>
---
 postlicyd/filter.c         | 21 +++++++++++++++++++--
 postlicyd/filter.h         |  2 +-
 postlicyd/main-postlicyd.c | 28 +++++++++++++++++-----------
 3 files changed, 37 insertions(+), 14 deletions(-)

diff --git a/postlicyd/filter.c b/postlicyd/filter.c
index f00a89a..aadc58c 100644
--- a/postlicyd/filter.c
+++ b/postlicyd/filter.c
@@ -133,9 +133,26 @@ void filter_wipe(filter_t *filter)
     p_delete(&filter->name);
 }
 
-filter_result_t filter_run(const filter_t *filter, const query_t *query)
+filter_hook_t *filter_run(const filter_t *filter, const query_t *query)
 {
-    return runners[filter->type](filter, query);
+    int start = 0;
+    int end   = filter->hooks.len;
+    filter_result_t res = runners[filter->type](filter, query);
+
+    while (start < end) {
+        int mid = (start + end) / 2;
+        filter_hook_t *hook = array_ptr(filter->hooks, mid);
+        if (hook->type == res) {
+            return hook;
+        } else if (res < hook->type) {
+            end = mid;
+        } else {
+            start = mid + 1;
+        }
+    }
+    syslog(LOG_WARNING, "missing hook %s for filter %s", 
+           htokens[res], filter->name);
+    return NULL;
 }
 
 void filter_set_name(filter_t *filter, const char *name, ssize_t len)
diff --git a/postlicyd/filter.h b/postlicyd/filter.h
index 12bde4b..8a1aacb 100644
--- a/postlicyd/filter.h
+++ b/postlicyd/filter.h
@@ -163,7 +163,7 @@ __attribute__((nonnull(1)))
 void filter_wipe(filter_t *filter);
 
 __attribute__((nonnull(1,2)))
-filter_result_t filter_run(const filter_t *filter, const query_t *query);
+filter_hook_t *filter_run(const filter_t *filter, const query_t *query);
 
 
 #endif
diff --git a/postlicyd/main-postlicyd.c b/postlicyd/main-postlicyd.c
index 3cce400..ad61029 100644
--- a/postlicyd/main-postlicyd.c
+++ b/postlicyd/main-postlicyd.c
@@ -166,25 +166,31 @@ static void policy_answer(server_t *pcy, const char *fmt, ...)
     epoll_modify(pcy->fd, EPOLLIN | EPOLLOUT, pcy);
 }
 
-static bool policy_run_filter(const query_t* query, void* filter, void* conf)
-{
-    return false;
-}
-
-static void policy_process(server_t *pcy)
+static void policy_process(server_t *pcy, config_t *config)
 {
     const query_t* query = pcy->data;
-    if (!policy_run_filter(query, NULL, NULL)) {
-        policy_answer(pcy, "DUNNO");
+    filter_t *filter = array_ptr(config->filters, config->entry_point);
+    while (true) {
+        filter_hook_t *hook = filter_run(filter, query);
+        if (hook == NULL) {
+            policy_answer(pcy, "DUNNO");
+            return;
+        } else if (hook->postfix) {
+            policy_answer(pcy, "%s", hook->value);
+            return;
+        } else {
+            filter = array_ptr(config->filters, hook->filter_id);
+        }
     }
 }
 
-static int policy_run(server_t *pcy, void* config)
+static int policy_run(server_t *pcy, void* vconfig)
 {
     ssize_t search_offs = MAX(0, pcy->ibuf.len - 1);
     int nb = buffer_read(&pcy->ibuf, pcy->fd, -1);
     const char *eoq;
-    query_t* query = pcy->data;
+    query_t  *query  = pcy->data;
+    config_t *config = vconfig;
 
     if (nb < 0) {
         if (errno == EAGAIN || errno == EINTR)
@@ -205,7 +211,7 @@ static int policy_run(server_t *pcy, void* config)
         return -1;
     query->eoq = eoq + strlen("\n\n");
     epoll_modify(pcy->fd, 0, pcy);
-    policy_process(pcy);
+    policy_process(pcy, config);
     return 0;
 }
 
-- 
2.20.1