move code for creating an event socket to a function

diff --git a/system-linux.c b/system-linux.c
index 9d6451f..11126fa 100644 (file)
--- a/system-linux.c
+++ b/system-linux.c
@@ -35,17 +35,40 @@ static struct nl_sock *sock_rtnl = NULL;
 
 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
 
-static void handler_nl_event(struct uloop_fd *u, unsigned int events)
+static void
+handler_nl_event(struct uloop_fd *u, unsigned int events)
 {
        struct event_socket *ev = container_of(u, struct event_socket, uloop);
        nl_recvmsgs(ev->sock, ev->cb);
 }
 
+static bool
+create_event_socket(struct event_socket *ev, int protocol,
+                   int (*cb)(struct nl_msg *msg, void *arg))
+{
+       // Prepare socket for link events
+       ev->cb = nl_cb_alloc(NL_CB_DEFAULT);
+       if (!ev->cb)
+               return false;
+
+       nl_cb_set(ev->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
+
+       ev->sock = nl_socket_alloc();
+       if (!ev->sock)
+               return false;
+
+       if (nl_connect(ev->sock, protocol))
+               return false;
+
+       ev->uloop.fd = nl_socket_get_fd(ev->sock);
+       ev->uloop.cb = handler_nl_event;
+       uloop_fd_add(&ev->uloop, ULOOP_READ | ULOOP_EDGE_TRIGGER);
+       return true;
+}
+
 int system_init(void)
 {
-       static struct event_socket rtnl_event = {
-               .uloop.cb = handler_nl_event,
-       };
+       static struct event_socket rtnl_event;
 
        sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
        fcntl(sock_ioctl, F_SETFD, fcntl(sock_ioctl, F_GETFD) | FD_CLOEXEC);
@@ -58,26 +81,12 @@ int system_init(void)
        if (nl_connect(sock_rtnl, NETLINK_ROUTE))
                return -1;
 
-       // Prepare socket for link events
-       rtnl_event.cb = nl_cb_alloc(NL_CB_DEFAULT);
-       if (!rtnl_event.cb)
-               return -1;
-
-       nl_cb_set(rtnl_event.cb, NL_CB_VALID, NL_CB_CUSTOM,
-                 cb_rtnl_event, NULL);
-
-       rtnl_event.sock = nl_socket_alloc();
-       if (!rtnl_event.sock)
-               return -1;
-
-       if (nl_connect(rtnl_event.sock, NETLINK_ROUTE))
+       if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
                return -1;
 
        // Receive network link events form kernel
        nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
 
-       rtnl_event.uloop.fd = nl_socket_get_fd(rtnl_event.sock);
-       uloop_fd_add(&rtnl_event.uloop, ULOOP_READ | ULOOP_EDGE_TRIGGER);
 
        return 0;
 }