OfflinePacketFilter: avoid leaks on error in init

1 files changed, 7 insertions, 1 deletions

diff --git a/src/offline_packet_filter.cpp b/src/offline_packet_filter.cpp
index a0fb462..ad8878a 100644
--- a/src/offline_packet_filter.cpp
+++ b/src/offline_packet_filter.cpp
@@ -58,8 +58,14 @@ void OfflinePacketFilter::init(const string& pcap_filter,
         link_type,
         snap_len
     );
+    if (!handle_) {
+        throw pcap_open_failed();
+    }
     if (pcap_compile(handle_, &filter_, pcap_filter.c_str(), 1, 0xffffffff) == -1) {
-        throw invalid_pcap_filter(pcap_geterr(handle_));
+        string error(pcap_geterr(handle_));
+        pcap_freecode(&filter_);
+        pcap_close(handle_);
+        throw invalid_pcap_filter(error.c_str());
     }
 }