From 49ade22bd990f5ad9165431a4c974e5d8b0e8732 Mon Sep 17 00:00:00 2001
From: Tamir Duberstein <tamird@google.com>
Date: Sun, 4 Oct 2020 21:56:48 +0000
Subject: [PATCH] Parse SocketAddrV6::scope_id

---
 library/std/src/net/parser.rs       | 13 +++++++++++--
 library/std/src/net/parser/tests.rs |  6 ++++--
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/library/std/src/net/parser.rs b/library/std/src/net/parser.rs
index 87ff18411c7..e8b89626fbd 100644
--- a/library/std/src/net/parser.rs
+++ b/library/std/src/net/parser.rs
@@ -32,7 +32,7 @@ macro_rules! impl_helper {
     })*)
 }
 
-impl_helper! { u8 u16 }
+impl_helper! { u8 u16 u32 }
 
 struct Parser<'a> {
     // parsing as ASCII, so can use byte array
@@ -219,6 +219,14 @@ impl<'a> Parser<'a> {
         })
     }
 
+    /// Read a % followed by a scope id in base 10.
+    fn read_scope_id(&mut self) -> Option<u32> {
+        self.read_atomically(|p| {
+            p.read_given_char('%')?;
+            p.read_number(10, None)
+        })
+    }
+
     /// Read an IPV4 address with a port
     fn read_socket_addr_v4(&mut self) -> Option<SocketAddrV4> {
         self.read_atomically(|p| {
@@ -233,10 +241,11 @@ impl<'a> Parser<'a> {
         self.read_atomically(|p| {
             p.read_given_char('[')?;
             let ip = p.read_ipv6_addr()?;
+            let scope_id = p.read_scope_id().unwrap_or(0);
             p.read_given_char(']')?;
 
             let port = p.read_port()?;
-            Some(SocketAddrV6::new(ip, port, 0, 0))
+            Some(SocketAddrV6::new(ip, port, 0, scope_id))
         })
     }
 
diff --git a/library/std/src/net/parser/tests.rs b/library/std/src/net/parser/tests.rs
index ecf5a782c0c..8d8889cd19d 100644
--- a/library/std/src/net/parser/tests.rs
+++ b/library/std/src/net/parser/tests.rs
@@ -3,6 +3,7 @@ use crate::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAdd
 use crate::str::FromStr;
 
 const PORT: u16 = 8080;
+const SCOPE_ID: u32 = 1337;
 
 const IPV4: Ipv4Addr = Ipv4Addr::new(192, 168, 0, 1);
 const IPV4_STR: &str = "192.168.0.1";
@@ -13,6 +14,7 @@ const IPV6_STR_FULL: &str = "2001:db8:0:0:0:0:c0a8:1";
 const IPV6_STR_COMPRESS: &str = "2001:db8::c0a8:1";
 const IPV6_STR_V4: &str = "2001:db8::192.168.0.1";
 const IPV6_STR_PORT: &str = "[2001:db8::c0a8:1]:8080";
+const IPV6_STR_PORT_SCOPE_ID: &str = "[2001:db8::c0a8:1%1337]:8080";
 
 #[test]
 fn parse_ipv4() {
@@ -74,8 +76,8 @@ fn parse_socket_v4() {
 
 #[test]
 fn parse_socket_v6() {
-    let result: SocketAddrV6 = IPV6_STR_PORT.parse().unwrap();
-    assert_eq!(result, SocketAddrV6::new(IPV6, PORT, 0, 0));
+    assert_eq!(IPV6_STR_PORT.parse(), Ok(SocketAddrV6::new(IPV6, PORT, 0, 0)));
+    assert_eq!(IPV6_STR_PORT_SCOPE_ID.parse(), Ok(SocketAddrV6::new(IPV6, PORT, 0, SCOPE_ID)));
 
     assert!(SocketAddrV6::from_str(IPV4_STR).is_err());
     assert!(SocketAddrV6::from_str(IPV4_STR_PORT).is_err());