Okhttp: Android: Use only IPV6 IP , when the wifi router provides both IPV4 and IPV6 addresses.

[NitzDKoder]

Hi,

Currently we are developing Android application with Okhttp.
We have a requirement to use only IPV6 wifi connection when the wifi rotuer provides both IPV4 and IPV6 addresses.

Currently okhttp picks wifi ipv4 ip and sends request out.

Okhttp Change:

One way to prioritize ipv6 is to fetch device ipv6 ip and create socket and bind to that ipv6 address.Hence request will go on that IP.

https://docs.oracle.com/javase/7/docs/api/java/net/Socket.html#Socket()

https://docs.oracle.com/javase/7/docs/api/java/net/Socket.html#bind(java.net.SocketAddress)

http://stackoverflow.com/questions/15673846/how-to-give-to-a-client-specific-ip-address-in-c

Is the design ok? Any other way in Okhttp?

Any option to specify address family like ipv4 vs ipv6.

Thanks
Nithin

[swankjesse]

You can write your own DNS that filters out IPv4 addresses.

[yschimke]

There are potentially two things you may want to combine

1) Select the IPv6 target address e.g. https://github.com/yschimke/oksocial/blob/b24caf077223cf54e2ab26589839e5ba2205c691/src/main/java/com/baulsupp/oksocial/network/DnsSelector.java

2) Bind against a specific local network interface e.g. https://github.com/yschimke/oksocial/blob/b24caf077223cf54e2ab26589839e5ba2205c691/src/main/java/com/baulsupp/oksocial/network/InterfaceSocketFactory.java

[swankjesse]

DnsSelector for the win.