[tcpdump-workers] Adding loopback adapter detection for Windows

[Guy Harris]

On Jan 24, 2016, at 8:30 AM, Yang Luo <hsluoyb at gmail.com> wrote:

> I forgot about one most important thing that libpcap seemingly doesn't
> compile under Windows, even if there's a Win32\Prj in it. Actually I got
> many errors when I build libpcap under VS2005.
> 
> I am quite confused with some lines like this in pcap-int.h:

The current version of libpcap's pcap-int.h doesn't look like:

> typedef int (*activate_op_t)(pcap_t *);
> typedef int (*can_set_rfmon_op_t)(pcap_t *);
> typedef int (*read_op_t)(pcap_t *, int cnt, pcap_handler, u_char *);
> typedef int (*inject_op_t)(pcap_t *, const void *, size_t);
> typedef int (*setfilter_op_t)(pcap_t *, struct bpf_program *);
> typedef int (*setdirection_op_t)(pcap_t *, pcap_direction_t);
> typedef int (*set_datalink_op_t)(pcap_t *, int);
> typedef int (*getnonblock_op_t)(pcap_t *, char *);
> typedef int (*setnonblock_op_t)(pcap_t *, int, char *);
> typedef int (*stats_op_t)(pcap_t *, struct pcap_stat *);
> #ifdef WIN32
> typedef int (*setbuff_op_t)(pcap_t *, int);
> typedef int (*setmode_op_t)(pcap_t *, int);
> typedef int (*setmintocopy_op_t)(pcap_t *, int);
> typedef Adapter *(*getadapter_op_t)(pcap_t *);
> #endif
> typedef void (*cleanup_op_t)(pcap_t *);

it looks like:

typedef int	(*activate_op_t)(pcap_t *);
typedef int	(*can_set_rfmon_op_t)(pcap_t *);
typedef int	(*read_op_t)(pcap_t *, int cnt, pcap_handler, u_char *);
typedef int	(*inject_op_t)(pcap_t *, const void *, size_t);
typedef int	(*setfilter_op_t)(pcap_t *, struct bpf_program *);
typedef int	(*setdirection_op_t)(pcap_t *, pcap_direction_t);
typedef int	(*set_datalink_op_t)(pcap_t *, int);
typedef int	(*getnonblock_op_t)(pcap_t *, char *);
typedef int	(*setnonblock_op_t)(pcap_t *, int, char *);
typedef int	(*stats_op_t)(pcap_t *, struct pcap_stat *);
#ifdef _WIN32
typedef struct pcap_stat *(*stats_ex_op_t)(pcap_t *, int *);
typedef int	(*setbuff_op_t)(pcap_t *, int);
typedef int	(*setmode_op_t)(pcap_t *, int);
typedef int	(*setmintocopy_op_t)(pcap_t *, int);
typedef HANDLE	(*getevent_op_t)(pcap_t *);
typedef int	(*oid_get_request_op_t)(pcap_t *, bpf_u_int32, void *, size_t);
typedef int	(*oid_set_request_op_t)(pcap_t *, bpf_u_int32, const void *, size_t);
typedef u_int	(*sendqueue_transmit_op_t)(pcap_t *, pcap_send_queue *, int);
typedef int	(*setuserbuffer_op_t)(pcap_t *, int);
typedef int	(*live_dump_op_t)(pcap_t *, char *, int, int);
typedef int	(*live_dump_ended_op_t)(pcap_t *, int);
typedef PAirpcapHandle	(*get_airpcap_handle_op_t)(pcap_t *);
#endif
typedef void	(*cleanup_op_t)(pcap_t *);

which, among other things, doesn't use "Adapter" at all.

And, speaking of Win32\Prj, that's now deprecated - get CMake:

	https://cmake.org

and use that.  autotools are also supported (and are the main build mechanisms supported) on UN*X, but the old Windows projects aren't being kept up-to-date.

> It seems that libpcap has considered Windows as there's WIN32 macro, but
> Adapter is not defined as VS2005 error shows.

You should use the *current* version of libpcap, not whatever older version you're using (the one that comes with WinPcap?).