bool cmatched = !strcmp(interface, c->name) || !strcmp(ifname, c->ifname);
matched |= cmatched;
- if (!cmatched && (!f || (f != c->upstream && f[-1] != 0)))
+ if (!cmatched && (!c->upstream_len || !f || (f != c->upstream && f[-1] != 0)))
continue;
if (!c->ignore)