Make protochain compat check more general.

[libpcap] / gencode.c

diff --git a/gencode.c b/gencode.c
index af0f3017a7e31f6943a419c24e574f8876175db3..ddc587c5b13f4984e8c4c2a2f2935f75b25ab084 100644 (file)
--- a/gencode.c
+++ b/gencode.c
@@ -5557,15 +5557,8 @@ gen_protochain(v, proto, dir)
         * branches, and backward branch support is unlikely to appear
         * in kernel BPF engines.)
         */
-       switch (linktype) {
-
-       case DLT_IEEE802_11:
-       case DLT_PRISM_HEADER:
-       case DLT_IEEE802_11_RADIO_AVS:
-       case DLT_IEEE802_11_RADIO:
-       case DLT_PPI:
-               bpf_error("'protochain' not supported with 802.11");
-       }
+       if (off_linkpl.is_variable)
+               bpf_error("'protochain' not supported with variable length headers");
 
        no_optimize = 1; /*this code is not compatible with optimzer yet */