This is an example to show how to create HTTP's GET request with constructing and capturing network packets using the Pcap.Net library for WinPcap available devices. Created for educational purposes.
COAP like protocol is also available as a branch.
UDP messaging example is also available as a branch.
DNS Lookup example is also available as a branch.
Implementation contains 3 main proceses;
- Establishing a proper TCP connection with creating 3-Way Handshake and getting Ephemeral port from operating system's kernel.
- Sending HTTP requests and waiting their responses over the TCP connection with the correct Sequence and Acknowledgement numbers.
- Termination of the TCP connection.
video.mp4
dotnet restore
dotnet build
Running with User Interaction mode. You will be asked for network interface selection and destination(ip or hostname) in this mode.
.\http-client.exe
Running with Destination Provisioning mode. You will be asked only for network interface selection.
.\http-client.exe <ip or hostname>
Running with Provisioning mode. You will not be asked for anything.
.\http-client.exe <interface id> <ip or hostname>
More resources about this request can be found in here
> http-client.exe 0 google.com
Internet 192.168.50.203
Source IP: 192.168.50.203
Source MAC: 0A:99:7C:15:7C:1B
Destination MAC: 96:7F:DB:82:F0:16
Destination IP: 142.250.187.174
Host: google.com
HTTP/1.1 301 Moved Permanently
Location: http://www.google.com/
Content-Type: text/html; charset=UTF-8
Date: Tue, 07 Jun 2022 21:32:58 GMT
Expires: Thu, 07 Jul 2022 21:32:58 GMT
Cache-Control: public, max-age=2592000
Server: gws
Content-Length: 219
X-XSS-Protection: 0
X-Frame-Options: SAMEORIGIN
<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>301 Moved</TITLE></HEAD><BODY>
<H1>301 Moved</H1>
The document has moved
<A HREF="http://www.google.com/">here</A>.
</BODY></HTML>
More resources about this request can be found in here
> http-client.exe 0 192.168.50.160
Internet 192.168.50.203
Source IP: 192.168.50.203
Source MAC: 0A:99:7C:15:7C:1B
Destination MAC: 96:7F:DB:82:F0:16
Destination IP: 192.168.50.160
HTTP/1.1 200 OK
Date: Tue, 07 Jun 2022 21:51:34 GMT
Connection: keep-alive
Keep-Alive: timeout=5
Transfer-Encoding: chunked
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Hello, World!
0
- MSVC redistributables
- .NET 6.0
- WinPcap driver.
- Pcap.Net (included with the repo)
Code is heavily based on the Pcap.Net's Wiki page.