path: root/include/fds.h
diff options
authorPablo Neira Ayuso <>2012-04-24 10:55:33 +0200
committerPablo Neira Ayuso <>2012-08-01 19:17:35 +0200
commitc712ccebc993cad3f73000bbe9e4788ebeb95ca2 (patch)
treeea989f68f8b5ae703948be15c76457d17d5a963d /include/fds.h
parentec4c0ff33746fb2c663194f27dd41deee83f870f (diff)
conntrackd: generalize file descriptor infrastructure
This patch generalizes the select-based file descriptor infrastructure by allowing you to register file descriptors and its callbacks. Instead of hardcoding the descriptors that needs to be checked. Now, struct fds_item contains a callback and pointer to data that is passed to it: struct fds_item { struct list_head head; int fd; + void (*cb)(void *data); + void *data; }; Then, we check which ones are active in the select_main_step() function: list_for_each_entry(cur, &STATE(fds)->list, head) { if (FD_ISSET(cur->fd, &readfds)) cur->cb(cur->data); } And it invoked the corresponding callback. I had to slightly modify the channel infrastructure to fit it into the changes. This modularity is required for the upcoming cthelper support. Signed-off-by: Pablo Neira Ayuso <>
Diffstat (limited to 'include/fds.h')
1 files changed, 3 insertions, 1 deletions
diff --git a/include/fds.h b/include/fds.h
index f3728d7..ed0c8be 100644
--- a/include/fds.h
+++ b/include/fds.h
@@ -12,11 +12,13 @@ struct fds {
struct fds_item {
struct list_head head;
int fd;
+ void (*cb)(void *data);
+ void *data;
struct fds *create_fds(void);
void destroy_fds(struct fds *);
-int register_fd(int fd, struct fds *fds);
+int register_fd(int fd, void (*cb)(void *data), void *data, struct fds *fds);
int unregister_fd(int fd, struct fds *fds);