From 3d4f509a62f347484f1ae3a9c7829972a674dbcf Mon Sep 17 00:00:00 2001
From: Matias Fontanini <matias.fontanini@gmail.com>
Date: Mon, 9 Jun 2014 10:24:09 -0300
Subject: [PATCH] Added call to pcap_can_set_rfmon before calling
 pcap_set_rfmon.

---
 src/sniffer.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/sniffer.cpp b/src/sniffer.cpp
index bbd3da8..4b4a78a 100644
--- a/src/sniffer.cpp
+++ b/src/sniffer.cpp
@@ -206,9 +206,11 @@ pcap_open_live_extended(const char *source, int snaplen, int promisc, int to_ms,
     status = pcap_set_timeout(p, to_ms);
     if (status < 0)
         goto fail;
-    status = pcap_set_rfmon(p, rfmon);
-    if (status < 0)
-        goto fail;
+    if(pcap_can_set_rfmon(p) == 1) {
+        status = pcap_set_rfmon(p, rfmon);
+        if (status < 0)
+            goto fail;
+    }
     status = pcap_activate(p);
     if (status < 0)
         goto fail;