net/tap: add link status notification

[dpdk.git] / drivers / net / tap / tap_netlink.c

diff --git a/drivers/net/tap/tap_netlink.c b/drivers/net/tap/tap_netlink.c
index 9710e41..6de896a 100644 (file)
--- a/drivers/net/tap/tap_netlink.c
+++ b/drivers/net/tap/tap_netlink.c
@@ -55,14 +55,21 @@ struct nested_tail {
 /**
  * Initialize a netlink socket for communicating with the kernel.
  *
+ * @param nl_groups
+ *   Set it to a netlink group value (e.g. RTMGRP_LINK) to receive messages for
+ *   specific netlink multicast groups. Otherwise, no subscription will be made.
+ *
  * @return
  *   netlink socket file descriptor on success, -1 otherwise.
  */
 int
-nl_init(void)
+nl_init(uint32_t nl_groups)
 {
        int fd, sndbuf_size = SNDBUF_SIZE, rcvbuf_size = RCVBUF_SIZE;
-       struct sockaddr_nl local = { .nl_family = AF_NETLINK };
+       struct sockaddr_nl local = {
+               .nl_family = AF_NETLINK,
+               .nl_groups = nl_groups,
+       };
 
        fd = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
        if (fd < 0) {