net-pre-up: permit interface name changing.

This allows the net-pre-up script to use external tools to rename interfaces, for example: newname="${IFNAME}-${PEERNAME:0:$(( 15 - ${#IFNAME} ))}" ip li set dev "${IFNAME}" name "${newname}" Signed-off-by: Jaco Kroon <[email protected]>
ppp-project · Aug 24, 2022 · 0d12ca7 · 0d12ca7
1 parent 6c56f53
commit 0d12ca7
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/pppd/main.c b/pppd/main.c
@@ -784,7 +784,13 @@ set_ifup(const char* name)
     const char** t;
 
     if (!up_protos) {
+	char iftmpname[IFNAMSIZ];
+	int ifindex = if_nametoindex(ifname);
 	run_net_script(PPP_PATH_NET_PREUP, 1);
+	if (if_indextoname(ifindex, iftmpname) && strcmp(iftmpname, ifname)) {
+	    info("Detected interface name change from %s to %s.", ifname, iftmpname);
+	    strcpy(ifname, iftmpname);
+	}
 	if (!netif_set_state(1))
 	    return 0;
     }