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diff --git a/contrib/libpcap/pcap/bpf.h b/contrib/libpcap/pcap/bpf.h
--- a/contrib/libpcap/pcap/bpf.h
+++ b/contrib/libpcap/pcap/bpf.h
@@ -74,6 +74,18 @@
extern "C" {
#endif
+/*
+ * In the past, we modified pcap/pcap.h to include the system net/bpf.h,
+ * rather than this file. However, starting around 1.10.2, libpcap requires
+ * the extern functions defined here to build. Simply reverting that local
+ * change is not a solution, because some ports with '#include <pcap.h>'
+ * such as mail/spamd and net/xprobe require the system net/bpf.h to be
+ * pulled in. To accommodate both requirements, make this header a wrapper
+ * around the system net/bpf.h, but keep the extern function definitions.
+ */
+#if defined(__FreeBSD__)
+#include <net/bpf.h>
+#else
/* BSD style release date */
#define BPF_RELEASE 199606
@@ -244,13 +256,17 @@
#define BPF_STMT(code, k) { (u_short)(code), 0, 0, k }
#define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k }
+#endif /* defined(__FreeBSD__) */
+
PCAP_API int bpf_validate(const struct bpf_insn *, int);
PCAP_API u_int bpf_filter(const struct bpf_insn *, const u_char *, u_int, u_int);
+#if !defined(__FreeBSD__)
/*
* Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).
*/
#define BPF_MEMWORDS 16
+#endif
#ifdef __cplusplus
}
diff --git a/contrib/libpcap/pcap/pcap.h b/contrib/libpcap/pcap/pcap.h
--- a/contrib/libpcap/pcap/pcap.h
+++ b/contrib/libpcap/pcap/pcap.h
@@ -85,7 +85,10 @@
#endif /* _WIN32/MSDOS/UN*X */
#include <pcap/socket.h> /* for SOCKET, as the active-mode rpcap APIs use it */
-#include <net/bpf.h>
+
+#ifndef PCAP_DONT_INCLUDE_PCAP_BPF_H
+#include <pcap/bpf.h>
+#endif
#include <stdio.h>

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