Index: bpf.c
===================================================================
RCS file: /cvs/src/sbin/dhcpleased/bpf.c,v
retrieving revision 1.2
diff -u -p -r1.2 bpf.c
--- bpf.c	2 Mar 2021 19:20:13 -0000	1.2
+++ bpf.c	28 Jun 2022 07:36:42 -0000
@@ -133,6 +133,7 @@ get_bpf_sock(const char *name)
 	struct ifreq		 ifr;
 	u_int			 sz;
 	int			 flag = 1, fildrop = BPF_FILDROP_CAPTURE;
+	unsigned int		 dlt = DLT_EN10MB;
 	int			 bpffd;
 
 	if ((bpffd = open("/dev/bpf", O_RDWR | O_CLOEXEC | O_NONBLOCK)) == -1)
@@ -179,6 +180,9 @@ get_bpf_sock(const char *name)
 		close(bpffd);
 		return -1;
 	}
+
+	if (ioctl(bpffd, BIOCSDLT, &dlt) == -1)
+		fatal("BIOCSDLT DLT_EN10MB");
 
 	if (ioctl(bpffd, BIOCLOCK, NULL) == -1)
 		fatal("BIOCLOCK");