Nathan Jennings wrote:
Thanks for the help and suggestions. They are implemented in the updated
attached "sniffex.c" source file, v0.1.1.
I've checked that in to the Web site, with some changes, and updated the
tutorial to refer to it (I changed both the tutorial code and sniffex.c
code to r
Guy Harris wrote:
>
> On Jun 29, 2005, at 1:20 PM, Guy Harris wrote:
>
>> Use "isprint()" rather than "isascii()" in "print_payload()".
>
>
> ...and, while you're at it, print the payload in hex, as well as
> ASCII, to emphasize that there's *no* guarantee that TCP data is text.
> A format such as
Guy Harris wrote:
On Jun 29, 2005, at 3:07 PM, Robert Lowe wrote:
Seems like that kind of functionality might be a good candidate for
inclusion in libpcap itself, no?? There are already functions to
dump to a savefile; why not printable output as well??
How much printable output do you w
>
>I've attached "sniffex.c", which is intended to be libpcap example code.
>It's based on Tim Carstens "sniffer.c" source.
>
>I hope "sniffex" will serve as a decent working example of libpcap code
>and provide basic documentation via comments for beginners. I also hope
>this can serve as a tem
广星 wrote:
How can I determine the right format?
For example a packet has been identified as an HTTP packet,
How can I know what its format is and are there many formats of the content of
http?
Note that a TCP segment, in a link-layer frame, doesn't necessarily
correspond to a single HTTP req
Thank you very much for the earnest detailed reply:-)~
But there are still some questions in my mind.
=== 2005-06-30 10:10:21 Guy Harris wrote：===
>
>On Jun 29, 2005, at 5:50 PM, 广星 wrote:
>
>> What I most concern about is how to print the payload in the
>> correct format?
>> For example,
On Jun 29, 2005, at 5:50 PM, 广星 wrote:
What I most concern about is how to print the payload in the
correct format?
For example, there is a HTTP packet, how can I print the HTTP
payload according to
its real content, such as"HTTP/1.1 206 Partial".
Well, the first thing you have to determi
>
>I've attached "sniffex.c", which is intended to be libpcap example code.
>It's based on Tim Carstens "sniffer.c" source.
>
>I hope "sniffex" will serve as a decent working example of libpcap code
>and provide basic documentation via comments for beginners. I also hope
>this can serve as a tem
On Jun 29, 2005, at 3:07 PM, Robert Lowe wrote:
Seems like that kind of functionality might be a good candidate for
inclusion in libpcap itself, no?? There are already functions to
dump to a savefile; why not printable output as well??
How much printable output do you want? Should libpcap i
Guy Harris wrote:
On Jun 29, 2005, at 1:20 PM, Guy Harris wrote:
Use "isprint()" rather than "isascii()" in "print_payload()".
...and, while you're at it, print the payload in hex, as well as ASCII,
to emphasize that there's *no* guarantee that TCP data is text. A
format such as
On Jun 29, 2005, at 1:20 PM, Guy Harris wrote:
Use "isprint()" rather than "isascii()" in "print_payload()".
...and, while you're at it, print the payload in hex, as well as
ASCII, to emphasize that there's *no* guarantee that TCP data is
text. A format such as
00 00 48 65
On Jun 29, 2005, at 12:11 PM, Nathan Jennings wrote:
There's one issue I've run into: after displaying certain packets
(see function print_payload), my xterm/bash shell loses the ability
to display newlines (i.e scroll lines). I suppose this is due to
the display of a certain sequence of c
Nathan Jennings wrote:
> There's one issue I've run into: after displaying certain packets (see
> function print_payload), my xterm/bash shell loses the ability to
> display newlines (i.e scroll lines). I suppose this is due to the
> display of a certain sequence of characters to my xterm/shell. An
Hello,
I've attached "sniffex.c", which is intended to be libpcap example code.
It's based on Tim Carstens "sniffer.c" source.
I hope "sniffex" will serve as a decent working example of libpcap code
and provide basic documentation via comments for beginners. I also hope
this can serve as a t
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