Original file line number	Diff line number	Diff line change
`@@ -111,7 +111,7 @@ mod test;`
`111`	`111`	`pub use crate::agent::Agent;`
`112`	`112`	`pub use crate::error::Error;`
`113`	`113`	`pub use crate::header::Header;`
`114`		`-pub use crate::request::Request;`
	`114`	`+pub use crate::request::{Request, IpVersion};`
`115`	`115`	`pub use crate::response::Response;`
`116`	`116`
`117`	`117`	`// re-export`

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,8 @@`
	`1`	`+use ureq::IpVersion;`
	`2`	`+`
	`3`	`+fn main() {`
	`4`	`+ ureq::get("https://google.com/")`
	`5`	`+.set_preferred_ip_version(IpVersion::V6)`
	`6`	`+.call();`
	`7`	`+println!("done");`
	`8`	`+}`

Original file line number	Diff line number	Diff line change
`@@ -21,6 +21,16 @@ lazy_static! {`
`21`	`21`	`{ Url::parse("http://localhost/").expect("Failed to parse URL_BASE") };`
`22`	`22`	`}`
`23`	`23`
	`24`	`+#[derive(Copy, Clone, Debug)]`
	`25`	`+pub enum IpVersion {`
	`26`	`+V4,`
	`27`	`+V6,`
	`28`	`+}`
	`29`	`+`
	`30`	`+impl Default for IpVersion {`
	`31`	`+fn default() -> Self { IpVersion::V6 }`
	`32`	`+}`
	`33`	`+`
`24`	`34`	`/// Request instances are builders that creates a request.`
`25`	`35`	`///`
`26`	`36`	/// ```
`@@ -45,6 +55,7 @@ pub struct Request {`
`45`	`55`	`pub(crate) timeout_read: u64,`
`46`	`56`	`pub(crate) timeout_write: u64,`
`47`	`57`	`pub(crate) redirects: u32,`
	`58`	`+pub(crate) preferred_ip_version: IpVersion,`
`48`	`59`	`}`
`49`	`60`
`50`	`61`	`impl ::std::fmt::Debug for Request {`
`@@ -219,6 +230,20 @@ impl Request {`
`219`	`230`	`self`
`220`	`231`	`}`
`221`	`232`
	`233`	`+/// Set IP version to use.`
	`234`	`+ ///`
	`235`	+ /// ```
	`236`	`+ /// let req = ureq::get("/my_page")`
	`237`	`+ /// .set_preferred_ip_version(IpVersion::V4)`
	`238`	`+ /// .call();`
	`239`	`+ ///`
	`240`	`+ /// assert_eq!(IpVersion::V4, req.preferred_api_version);`
	`241`	+ /// ```
	`242`	`+ pub fn set_preferred_ip_version(&mut self, ip_version: IpVersion) -> &mut Request {`
	`243`	`+self.preferred_ip_version = ip_version;`
	`244`	`+self`
	`245`	`+}`
	`246`	`+`
`222`	`247`	`/// Returns the value for a set header.`
`223`	`248`	`///`
`224`	`249`	/// ```

Original file line number	Diff line number	Diff line change
`@@ -11,6 +11,7 @@ use rustls::StreamOwned;`
`11`	`11`
`12`	`12`	`use crate::error::Error;`
`13`	`13`	`use crate::unit::Unit;`
	`14`	`+use crate::request::IpVersion;`
`14`	`15`
`15`	`16`	`#[allow(clippy::large_enum_variant)]`
`16`	`17`	`pub enum Stream {`
`@@ -167,8 +168,18 @@ pub(crate) fn connect_host(unit: &Unit, hostname: &str, port: u16) -> Result<Tcp`
`167`	`168`	`return Err(Error::DnsFailed(format!("No ip address for {}", hostname)));`
`168`	`169`	`}`
`169`	`170`
`170`		`-// pick first ip, or should we randomize?`
`171`		`-let sock_addr = ips[0];`
	`171`	`+let sock_addr =`
	`172`	`+if let Some(ip) = ips.iter().find(`
	`173`	`+ \|&&ip\|`
	`174`	`+match (ip, unit.preferred_ip_version) {`
	`175`	`+(std::net::SocketAddr::V6(_), IpVersion::V6) => true,`
	`176`	`+(std::net::SocketAddr::V4(_), IpVersion::V4) => true,`
	`177`	`+ _ => false,`
	`178`	`+}) {`
	`179`	`+*ip`
	`180`	`+} else {`
	`181`	`+ ips[0]`
	`182`	`+};`
`172`	`183`
`173`	`184`	`// connect with a configured timeout.`
`174`	`185`	`let stream = match unit.timeout_connect {`

Original file line number	Diff line number	Diff line change
`@@ -11,7 +11,7 @@ use crate::agent::AgentState;`
`11`	`11`	`use crate::body::{self, Payload, SizedReader};`
`12`	`12`	`use crate::header;`
`13`	`13`	`use crate::stream::{self, connect_https, connect_test, Stream};`
`14`		`-use crate::{Error, Header, Request, Response};`
	`14`	`+use crate::{Error, Header, Request, Response, IpVersion};`
`15`	`15`
`16`	`16`	`use crate::pool::DEFAULT_HOST;`
`17`	`17`
`@@ -29,6 +29,7 @@ pub(crate) struct Unit {`
`29`	`29`	`pub timeout_read: u64,`
`30`	`30`	`pub timeout_write: u64,`
`31`	`31`	`pub method: String,`
	`32`	`+pub preferred_ip_version: IpVersion,`
`32`	`33`	`}`
`33`	`34`
`34`	`35`	`impl Unit {`
`@@ -82,6 +83,7 @@ impl Unit {`
`82`	`83`	`is_chunked,`
`83`	`84`	`query_string,`
`84`	`85`	`headers,`
	`86`	`+preferred_ip_version: req.preferred_ip_version,`
`85`	`87`	`timeout_connect: req.timeout_connect,`
`86`	`88`	`timeout_read: req.timeout_read,`
`87`	`89`	`timeout_write: req.timeout_write,`