diff --git a/interface.h b/interface.h
new file mode 100644
index 0000000..49ba87d
--- /dev/null
+++ b/interface.h
@@ -0,0 +1,371 @@
+/*
+ * Copyright (c) 1988-2002
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * @(#) $Header: /tcpdump/master/tcpdump/interface.h,v 1.244.2.21 2007/03/28 07:45:46 hannes Exp $ (LBL)
+ */
+
+#ifndef tcpdump_interface_h
+#define tcpdump_interface_h
+
+#ifdef HAVE_OS_PROTO_H
+#include "os-proto.h"
+#endif
+
+#ifndef HAVE___ATTRIBUTE__
+#define __attribute__(x)
+#endif
+
+/* snprintf et al */
+
+#include <stdarg.h>
+
+#if HAVE_STDINT_H
+#include <stdint.h>
+#endif
+
+#if !defined(HAVE_SNPRINTF)
+int snprintf(char *, size_t, const char *, ...)
+     __attribute__((format(printf, 3, 4)));
+#endif
+
+#if !defined(HAVE_VSNPRINTF)
+int vsnprintf(char *, size_t, const char *, va_list)
+     __attribute__((format(printf, 3, 0)));
+#endif
+
+#ifndef HAVE_STRLCAT
+extern size_t strlcat(char *, const char *, size_t);
+#endif
+#ifndef HAVE_STRLCPY
+extern size_t strlcpy(char *, const char *, size_t);
+#endif
+
+#ifndef HAVE_STRDUP
+extern char *strdup(const char *);
+#endif
+
+#ifndef HAVE_STRSEP
+extern char *strsep(char **, const char *);
+#endif
+
+#define PT_VAT		1	/* Visual Audio Tool */
+#define PT_WB		2	/* distributed White Board */
+#define PT_RPC		3	/* Remote Procedure Call */
+#define PT_RTP		4	/* Real-Time Applications protocol */
+#define PT_RTCP		5	/* Real-Time Applications control protocol */
+#define PT_SNMP		6	/* Simple Network Management Protocol */
+#define PT_CNFP		7	/* Cisco NetFlow protocol */
+#define PT_TFTP		8	/* trivial file transfer protocol */
+#define PT_AODV		9	/* Ad-hoc On-demand Distance Vector Protocol */
+
+#ifndef min
+#define min(a,b) ((a)>(b)?(b):(a))
+#endif
+#ifndef max
+#define max(a,b) ((b)>(a)?(b):(a))
+#endif
+
+/*
+ * The default snapshot length.  This value allows most printers to print
+ * useful information while keeping the amount of unwanted data down.
+ */
+#ifndef INET6
+#define DEFAULT_SNAPLEN 68	/* ether + IPv4 + TCP + 14 */
+#else
+#define DEFAULT_SNAPLEN 96	/* ether + IPv6 + TCP + 22 */
+#endif
+
+#ifndef BIG_ENDIAN
+#define BIG_ENDIAN 4321
+#define LITTLE_ENDIAN 1234
+#endif
+
+#define ESRC(ep) ((ep)->ether_shost)
+#define EDST(ep) ((ep)->ether_dhost)
+
+#ifndef NTOHL
+#define NTOHL(x)	(x) = ntohl(x)
+#define NTOHS(x)	(x) = ntohs(x)
+#define HTONL(x)	(x) = htonl(x)
+#define HTONS(x)	(x) = htons(x)
+#endif
+#endif
+
+#ifndef MIN
+#define MIN(a,b) ((a)<(b)?(a):(b))
+#endif
+
+extern char *program_name;	/* used to generate self-identifying messages */
+
+extern int32_t thiszone;	/* seconds offset from gmt to local time */
+
+/*
+ * True if  "l" bytes of "var" were captured.
+ *
+ * The "snapend - (l) <= snapend" checks to make sure "l" isn't so large
+ * that "snapend - (l)" underflows.
+ *
+ * The check is for <= rather than < because "l" might be 0.
+ */
+#define TTEST2(var, l) (snapend - (l) <= snapend && \
+			(const u_char *)&(var) <= snapend - (l))
+
+/* True if "var" was captured */
+#define TTEST(var) TTEST2(var, sizeof(var))
+
+/* Bail if "l" bytes of "var" were not captured */
+#define TCHECK2(var, l) if (!TTEST2(var, l)) goto trunc
+
+/* Bail if "var" was not captured */
+#define TCHECK(var) TCHECK2(var, sizeof(var))
+
+extern void ts_print(const struct timeval *);
+extern void relts_print(int);
+
+extern int fn_print(const u_char *, const u_char *);
+extern int fn_printn(const u_char *, u_int, const u_char *);
+extern int fn_printzp(const u_char *, u_int, const u_char *);
+extern int mask2plen(u_int32_t);
+extern const char *tok2strary_internal(const char **, int, const char *, int);
+#define	tok2strary(a,f,i) tok2strary_internal(a, sizeof(a)/sizeof(a[0]),f,i)
+
+extern const char *dnaddr_string(u_short);
+
+extern void error(const char *, ...)
+    __attribute__((noreturn, format (printf, 1, 2)));
+extern void warning(const char *, ...) __attribute__ ((format (printf, 1, 2)));
+
+extern char *read_infile(char *);
+extern char *copy_argv(char **);
+
+extern void safeputchar(int);
+extern void safeputs(const char *, int);
+
+extern const char *isonsap_string(const u_char *, register u_int);
+extern const char *protoid_string(const u_char *);
+extern const char *ipxsap_string(u_short);
+extern const char *dnname_string(u_short);
+extern const char *dnnum_string(u_short);
+
+/* The printer routines. */
+
+#include <pcap.h>
+
+extern int print_unknown_data(const u_char *, const char *,int);
+extern void ascii_print(const u_char *, u_int);
+extern void hex_and_ascii_print_with_offset(const char *, const u_char *,
+	u_int, u_int);
+extern void hex_and_ascii_print(const char *, const u_char *, u_int);
+extern void hex_print_with_offset(const char *, const u_char *, u_int, u_int);
+extern void hex_print(const char *, const u_char *, u_int);
+extern void telnet_print(const u_char *, u_int);
+extern int ether_encap_print(u_short, const u_char *, u_int, u_int, u_short *);
+extern int llc_print(const u_char *, u_int, u_int, const u_char *,
+	const u_char *, u_short *);
+extern int snap_print(const u_char *, u_int, u_int, u_short *, u_int);
+extern void aarp_print(const u_char *, u_int);
+extern void aodv_print(const u_char *, u_int, int);
+extern void atalk_print(const u_char *, u_int);
+extern void atm_print(u_int, u_int, u_int, const u_char *, u_int, u_int);
+extern u_int atm_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int sunatm_if_print(const struct pcap_pkthdr *, const u_char *);
+extern int oam_print(const u_char *, u_int, u_int);
+extern void bootp_print(const u_char *, u_int);
+extern void bgp_print(const u_char *, int);
+extern void beep_print(const u_char *, u_int);
+extern void cnfp_print(const u_char *, const u_char *);
+extern void decnet_print(const u_char *, u_int, u_int);
+extern void default_print(const u_char *, u_int);
+extern void dvmrp_print(const u_char *, u_int);
+extern void egp_print(const u_char *, u_int);
+extern u_int enc_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int pflog_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int arcnet_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int arcnet_linux_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void ether_print(const u_char *, u_int, u_int);
+extern u_int ether_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int token_print(const u_char *, u_int, u_int);
+extern u_int token_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void fddi_print(const u_char *, u_int, u_int);
+extern u_int fddi_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int fr_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int mfr_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int fr_print(register const u_char *, u_int);
+extern u_int mfr_print(register const u_char *, u_int);
+extern u_int ieee802_11_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int ieee802_11_radio_if_print(const struct pcap_pkthdr *,
+	const u_char *);
+extern u_int ap1394_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void gre_print(const u_char *, u_int);
+extern void icmp_print(const u_char *, u_int, const u_char *, int);
+extern void igmp_print(const u_char *, u_int);
+extern void igrp_print(const u_char *, u_int, const u_char *);
+extern void ipN_print(const u_char *, u_int);
+extern u_int ipfc_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void ipx_print(const u_char *, u_int);
+extern void isoclns_print(const u_char *, u_int, u_int);
+extern void krb_print(const u_char *);
+extern u_int llap_print(const u_char *, u_int);
+extern u_int ltalk_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void msdp_print(const unsigned char *, u_int);
+extern void nfsreply_print(const u_char *, u_int, const u_char *);
+extern void nfsreq_print(const u_char *, u_int, const u_char *);
+extern void ns_print(const u_char *, u_int, int);
+extern void ntp_print(const u_char *, u_int);
+extern u_int null_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void ospf_print(const u_char *, u_int, const u_char *);
+extern void olsr_print (const u_char *, u_int);
+extern void pimv1_print(const u_char *, u_int);
+extern void cisco_autorp_print(const u_char *, u_int);
+extern void rsvp_print(const u_char *, u_int);
+extern void ldp_print(const u_char *, u_int);
+extern void lmp_print(const u_char *, u_int);
+extern void lspping_print(const u_char *, u_int);
+extern void eigrp_print(const u_char *, u_int);
+extern void mobile_print(const u_char *, u_int);
+extern void pim_print(const u_char *, u_int);
+extern u_int pppoe_print(const u_char *, u_int);
+extern u_int ppp_print(register const u_char *, u_int);
+extern u_int ppp_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int ppp_hdlc_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int ppp_bsdos_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int pppoe_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int prism_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void q933_print(const u_char *, u_int);
+extern int vjc_print(register const char *, u_short);
+extern u_int raw_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void rip_print(const u_char *, u_int);
+extern u_int sl_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void lane_print(const u_char *, u_int, u_int);
+extern u_int lane_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int cip_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int sl_bsdos_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int chdlc_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int chdlc_print(register const u_char *, u_int);
+extern u_int juniper_atm1_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_atm2_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_mfr_print(const struct pcap_pkthdr *, register const u_char *);
+extern u_int juniper_mlfr_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_mlppp_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_pppoe_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_pppoe_atm_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_ggsn_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_es_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_monitor_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_services_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_ether_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_ppp_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_frelay_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int juniper_chdlc_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int sll_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void snmp_print(const u_char *, u_int);
+extern void sunrpcrequest_print(const u_char *, u_int, const u_char *);
+extern u_int symantec_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void tcp_print(const u_char *, u_int, const u_char *, int);
+extern void tftp_print(const u_char *, u_int);
+extern void timed_print(const u_char *);
+extern void udp_print(const u_char *, u_int, const u_char *, int);
+extern void wb_print(const void *, u_int);
+extern int ah_print(register const u_char *);
+extern int ipcomp_print(register const u_char *, int *);
+extern void rx_print(register const u_char *, int, int, int, u_char *);
+extern void netbeui_print(u_short, const u_char *, int);
+extern void ipx_netbios_print(const u_char *, u_int);
+extern void nbt_tcp_print(const u_char *, int);
+extern void nbt_udp137_print(const u_char *, int);
+extern void nbt_udp138_print(const u_char *, int);
+extern char *smb_errstr(int, int);
+extern const char *nt_errstr(u_int32_t);
+extern void print_data(const unsigned char *, int);
+extern void l2tp_print(const u_char *, u_int);
+extern void vrrp_print(const u_char *, u_int, int);
+extern void slow_print(const u_char *, u_int);
+extern void pgm_print(const u_char *, u_int, const u_char *);
+extern void cdp_print(const u_char *, u_int, u_int);
+extern void stp_print(const u_char *, u_int);
+extern void radius_print(const u_char *, u_int);
+extern void lwres_print(const u_char *, u_int);
+extern void pptp_print(const u_char *);
+extern void dccp_print(const u_char *, const u_char *, u_int);
+extern void sctp_print(const u_char *, const u_char *, u_int);
+extern void mpls_print(const u_char *, u_int);
+extern void mpls_lsp_ping_print(const u_char *, u_int);
+extern void zephyr_print(const u_char *, int);
+extern void hsrp_print(const u_char *, u_int);
+extern void bfd_print(const u_char *, u_int, u_int);
+extern void sip_print(const u_char *, u_int);
+extern void syslog_print(const u_char *, u_int);
+
+#ifdef INET6
+extern void ip6_print(const u_char *, u_int);
+extern void ip6_opt_print(const u_char *, int);
+extern int hbhopt_print(const u_char *);
+extern int dstopt_print(const u_char *);
+extern int frag6_print(const u_char *, const u_char *);
+extern int mobility_print(const u_char *, const u_char *);
+extern void icmp6_print(const u_char *, u_int, const u_char *, int);
+extern void ripng_print(const u_char *, unsigned int);
+extern int rt6_print(const u_char *, const u_char *);
+extern void ospf6_print(const u_char *, u_int);
+extern void dhcp6_print(const u_char *, u_int);
+#endif /*INET6*/
+extern u_short in_cksum(const u_short *, register u_int, int);
+extern u_int16_t in_cksum_shouldbe(u_int16_t, u_int16_t);
+
+#ifndef HAVE_BPF_DUMP
+struct bpf_program;
+
+extern void bpf_dump(struct bpf_program *, int);
+
+#endif
+
+#include "netdissect.h"
+
+/* forward compatibility */
+
+extern netdissect_options *gndo;
+
+#define eflag gndo->ndo_eflag 
+#define fflag gndo->ndo_fflag 
+#define nflag gndo->ndo_nflag 
+#define Nflag gndo->ndo_Nflag 
+#define Oflag gndo->ndo_Oflag 
+#define pflag gndo->ndo_pflag 
+#define qflag gndo->ndo_qflag 
+#define Rflag gndo->ndo_Rflag 
+#define sflag gndo->ndo_sflag 
+#define Sflag gndo->ndo_Sflag 
+#define tflag gndo->ndo_tflag 
+#define Uflag gndo->ndo_Uflag 
+#define uflag gndo->ndo_uflag 
+#define vflag gndo->ndo_vflag 
+#define xflag gndo->ndo_xflag 
+#define Xflag gndo->ndo_Xflag 
+#define Cflag gndo->ndo_Cflag 
+#define Aflag gndo->ndo_Aflag 
+#define suppress_default_print gndo->ndo_suppress_default_print
+#define packettype gndo->ndo_packettype
+#define tcpmd5secret gndo->ndo_tcpmd5secret
+#define Wflag gndo->ndo_Wflag
+#define WflagChars gndo->ndo_WflagChars
+#define Cflag_count gndo->ndo_Cflag_count
+#define snaplen     gndo->ndo_snaplen
+#define snapend     gndo->ndo_snapend
+