fix logic error for skipping failed interfaces in if_nameindex

diff --git a/src/network/if_nameindex.c b/src/network/if_nameindex.c
index 580acce..cdb956c 100644 (file)
--- a/src/network/if_nameindex.c
+++ b/src/network/if_nameindex.c
@@ -10,7 +10,7 @@
 
 static void *do_nameindex(int s, size_t n)
 {
-       size_t i, len;
+       size_t i, len, k;
        struct ifconf conf;
        struct if_nameindex *idx;
 
@@ -29,17 +29,16 @@ static void *do_nameindex(int s, size_t n)
        }
 
        n = conf.ifc_len / sizeof(struct ifreq);
-       for (i=0; i<n; i++) {
+       for (i=k=0; i<n; i++) {
                if (ioctl(s, SIOCGIFINDEX, &conf.ifc_req[i]) < 0) {
-                       i--;
-                       n--;
+                       k++;
                        continue;
                }
-               idx[i].if_index = conf.ifc_req[i].ifr_ifindex;
-               idx[i].if_name = conf.ifc_req[i].ifr_name;
+               idx[i-k].if_index = conf.ifc_req[i].ifr_ifindex;
+               idx[i-k].if_name = conf.ifc_req[i].ifr_name;
        }
-       idx[i].if_name = 0;
-       idx[i].if_index = 0;
+       idx[i-k].if_name = 0;
+       idx[i-k].if_index = 0;
 
        return idx;
 }