Re: Using TCHAR with pcap and sockets (send/recv/setsockopt)

Rayne <>
Wed, 10 Feb 2010 02:22:45 -0800 (PST)
On Feb 9, 5:35 pm, "Alex Blekhman" <> wrote:

"Rayne" wrote:

Thank you for all the suggestions.

I'm trying to use the A2T macro for my pcap_loop callback
function "got_packet".

So I have

void got_packet(u_char *cuser, const struct pcap_pkthdr *header,
u_char *cpacket)
  _TUCHAR *user, *packet;
  user = A2T(cuser);
  packet = A2T(cpacket);

Well, it seems you've ignored my other post even though it
describes your case. I looked up the `pcap_loop' function and it
seems that you don't need any conversions at all. The type
`u_char' is used as a substitute for a byte, i.e. actual data is


Sorry, I must have missed your post.

So after reading all the suggestions, I think that my initial approach
is wrong, in that I simply tried to convert all char and char * to

So under what circumstances would I need the conversion, besides when
using string functions like strlen and strcat, APIs that have the A/W
versions and filenames longer than MAX_PATH characters?

Thank you.


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