Re: [PATCH gwproxy v13 0/8] Initial work on integration of DNS parser lib in gwproxy

[Ammar Faizi <ammarfaizi2@gnuweeb.org>]

On Tue, Sep 30, 2025 at 03:54:20PM +0700, Alviro Iskandar Setiawan wrote:
> How to test this feature:
> 	./configure --cc=clang --use-new-dns-resolver;
> 	make -j$(nproc);
> 	./gwproxy --as-socks5=1 --raw-dns=1 --nr-workers=1 --log-level=4 --bind=[::]:1080 --dns-server=1.1.1.1:53;
> 
> Then in another terminal, you can use curl to test it:
> 	curl --proxy socks5h://[::1]:1080 http://example.com;

Something is wrong with the DNS resolver when the host is IPv6 only.

See the test result below. The first command passes the DNS resolution
to the socks5 proxy using "socks5h" protocol. The second command
doesn't pass the DNS resolution to the proxy ("socks5" protocol).

It fails to connect when "socks5h" protocol is used.

ammarfaizi2@integral2:~/p/gwproxy$ curl --proxy socks5h://[::1]:1080 http://ipv6.google.com -I
curl: (97) Can't complete SOCKS5 connection to ipv6.google.com. (1)
ammarfaizi2@integral2:~/p/gwproxy$ curl --proxy socks5://[::1]:1080 http://ipv6.google.com -I
HTTP/1.1 200 OK
Content-Type: text/html; charset=ISO-8859-1
Content-Security-Policy-Report-Only: object-src 'none';base-uri 'self';script-src 'nonce-R7kFvjRoN0JGjOEIlvYR6w' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/gws/other-hp
P3P: CP="This is not a P3P policy! See g.co/p3phelp for more info."
Date: Thu, 02 Oct 2025 07:00:52 GMT
Server: gws
X-XSS-Protection: 0
X-Frame-Options: SAMEORIGIN
Transfer-Encoding: chunked
Expires: Thu, 02 Oct 2025 07:00:52 GMT
Cache-Control: private
Set-Cookie: AEC=AaJma5teFbD1EKZ-IdFFaFxb12EGStsW29TNoc6UTvdnTF_lvsrJ-uO5Pnw; expires=Tue, 31-Mar-2026 07:00:52 GMT; path=/; domain=.google.com; Secure; HttpOnly; SameSite=lax
Set-Cookie: NID=525=kMxrGPvttMHU7RVD-aHf_zoDqInsQVb8IB0czwUdjrFGI8oy7dq9FOQlC1PyM88ERuAZpzCP7HG9YCCZVhMahRyjq03p6763EfLWm8CezRxWqCUK-x0pAmjE1_TZOvVbOGSATxFJcwwr40_84bnoVcMbsh8juhzFmWHi7I6mWwnhd76VxT19lDRimvAJnsOcAHEeTwSHx8H7O9E; expires=Fri, 03-Apr-2026 07:00:52 GMT; path=/; domain=.google.com; HttpOnly


-- 
Ammar Faizi