Avoid collisions between pcap/bpf.h and Packet32.h structure definitions.

In most cases, avoid Packet32.h's definition of BPF structures, which
are different from pcap/bpf.h's definitions, by defining
BPF_MAJOR_VERSION before including it.

In the cases where we *do* need Packet32.h's definitions, define
PCAP_DONT_INCLUDE_PCAP_BPF_H to make sure pcap/bpf.h doesn't get
included and define them, and include <Packet32.h> before pcap-int.h,
*without* BPF_MAJOR_VERSION being defined, so that it defines those
structures.  For pcap-win32.h, also include pcap/dlt.h, so we get the
DLT_ values defined.

1 files changed, 5 insertions, 0 deletions

diff --git a/pcap-int.h b/pcap-int.h
index 655c19d9..8abbf254 100644
--- a/pcap-int.h
+++ b/pcap-int.h
@@ -41,6 +41,11 @@ extern "C" {
 #endif
 
 #ifdef _WIN32
+/*
+ * Make sure Packet32.h doesn't define BPF structures that we've
+ * probably already defined as a result of including <pcap/pcap.h>.
+ */
+#define BPF_MAJOR_VERSION
 #include <Packet32.h>
 extern CRITICAL_SECTION g_PcapCompileCriticalSection;
 #endif /* _WIN32 */