From 273898a7a155895de69cde048b96f6ffb5f1fc47 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@realraum.at>
Date: Thu, 10 Sep 2009 00:59:51 +0000
Subject: [PATCH] added request and error listeners

---
 door_daemon/client_list.c   |    2 ++
 door_daemon/client_list.h   |    2 ++
 door_daemon/command_queue.h |    2 +-
 door_daemon/door_daemon.c   |   59 ++++++++++++++++++++++++++++++++++++-------
 4 files changed, 55 insertions(+), 10 deletions(-)

diff --git a/door_daemon/client_list.c b/door_daemon/client_list.c
index d989687..2c4c41c 100644
--- a/door_daemon/client_list.c
+++ b/door_daemon/client_list.c
@@ -46,6 +46,8 @@ int client_add(client_t** first, int fd)
 
   new_client->fd = fd;
   new_client->status_listener = 0;
+  new_client->error_listener = 0;
+  new_client->request_listener = 0;
   new_client->next = NULL;
   new_client->buffer.offset = 0;
 
diff --git a/door_daemon/client_list.h b/door_daemon/client_list.h
index 8bb14f9..d35c433 100644
--- a/door_daemon/client_list.h
+++ b/door_daemon/client_list.h
@@ -26,6 +26,8 @@
 struct client_struct {
   int fd;
   int status_listener;
+  int error_listener;
+  int request_listener;
   struct client_struct* next;
   read_buffer_t buffer;
 };
diff --git a/door_daemon/command_queue.h b/door_daemon/command_queue.h
index bc153fe..1b26e3a 100644
--- a/door_daemon/command_queue.h
+++ b/door_daemon/command_queue.h
@@ -23,7 +23,7 @@
 
 #include <sys/time.h>
 
-enum cmd_id_enum { OPEN, CLOSE, TOGGLE, RESET, STATUS, LOG };
+enum cmd_id_enum { OPEN, CLOSE, TOGGLE, RESET, STATUS, LOG , LISTEN };
 typedef enum cmd_id_enum cmd_id_t;
 
 struct cmd_struct {
diff --git a/door_daemon/door_daemon.c b/door_daemon/door_daemon.c
index e9c02a1..f7bb2f8 100644
--- a/door_daemon/door_daemon.c
+++ b/door_daemon/door_daemon.c
@@ -154,15 +154,7 @@ int process_cmd(const char* cmd, int fd, cmd_t **cmd_q, client_t* client_lst)
   else if(!strncmp(cmd, "log", 3))
     cmd_id = LOG;
   else if(!strncmp(cmd, "listen", 6)) {
-    client_t* listener = client_find(client_lst, fd);
-    if(listener) {
-      log_printf(DEBUG, "adding status listener %d", fd);
-      listener->status_listener = 1;
-    }
-    else       
-      log_printf(ERROR, "unable to add status listener %d", fd);
-
-    return 0;
+    cmd_id = LISTEN;
   }
   else {
     log_printf(WARNING, "unknown command '%s'", cmd);
@@ -172,6 +164,21 @@ int process_cmd(const char* cmd, int fd, cmd_t **cmd_q, client_t* client_lst)
   if(param) 
     param++;
 
+  if(cmd_id == OPEN || cmd_id == CLOSE || cmd_id == TOGGLE) {
+    char* resp;
+    asprintf(&resp, "Request: %s", cmd);
+    if(resp) {
+      char* linefeed = strchr(resp, '\n');
+      if(linefeed) linefeed[0] = 0;
+      client_t* client;
+      for(client = client_lst; client; client = client->next)
+        if(client->request_listener && client->fd != fd)
+          send_response(client->fd, resp);
+      free(resp);
+    }
+// else silently ignore memory alloc error
+  }
+
   switch(cmd_id) {
   case OPEN:
   case CLOSE:
@@ -192,6 +199,33 @@ int process_cmd(const char* cmd, int fd, cmd_t **cmd_q, client_t* client_lst)
       log_printf(DEBUG, "ignoring empty ext log message");
     break;
   }
+  case LISTEN: {
+    client_t* listener = client_find(client_lst, fd);
+    if(listener) {
+      if(!param) {
+        listener->status_listener = 1;
+        listener->error_listener = 1;      
+        listener->request_listener = 1;
+      }
+      else {
+        if(!strncmp(param, "status", 6))
+          listener->status_listener = 1;
+        else if(!strncmp(param, "error", 5))
+          listener->error_listener = 1;      
+        else if(!strncmp(param, "request", 7))
+          listener->request_listener = 1;
+        else {
+          log_printf(DEBUG, "unkown listener type '%s'", param);
+          break;
+        }
+      }
+      log_printf(DEBUG, "listener %d requests %s messages", fd, param ? param:"all");
+    }
+    else {
+      log_printf(ERROR, "unable to add listener %d", fd);
+    }
+    break;
+  }
   }
   
   return 0;
@@ -269,6 +303,13 @@ int process_door(read_buffer_t* buffer, int door_fd, cmd_t **cmd_q, client_t* cl
           if(client->status_listener && client->fd != cmd_fd)
             send_response(client->fd, buffer->buf);
       }
+
+      if(!strncmp(buffer->buf, "Error:", 6)) {
+        client_t* client;
+        for(client = client_lst; client; client = client->next)
+          if(client->error_listener && client->fd != cmd_fd)
+            send_response(client->fd, buffer->buf);
+      }
       
       cmd_pop(cmd_q);
       buffer->offset = 0;
-- 
1.7.10.4