sd-lldp: hide internal details

Currently, sd-lldp.h exports "UPDATE_INFO".. and defines it to a magic
constant '10'. This is completely bogus, so fix it to follow our coding
standards:

  - Prefix exported symbols by SD_LLDP_*

  - Define a separate event-enum for event types

  - Translate internal state to external event-types

1 files changed, 9 insertions, 6 deletions

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 215c47b8af..86f1c3bb1a 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -1112,13 +1112,16 @@ static void lldp_handler(sd_lldp *lldp, int event, void *userdata) {
         assert(link->network);
         assert(link->manager);
 
-        if (event != UPDATE_INFO)
-                return;
-
-        r = sd_lldp_save(link->lldp, link->lldp_file);
-        if (r < 0)
-                log_link_warning_errno(link, r, "Could not save LLDP: %m");
+        switch (event) {
+        case SD_LLDP_EVENT_UPDATE_INFO:
+                r = sd_lldp_save(link->lldp, link->lldp_file);
+                if (r < 0)
+                        log_link_warning_errno(link, r, "Could not save LLDP: %m");
 
+                break;
+        default:
+                break;
+        }
 }
 
 static int link_acquire_conf(Link *link) {