Remove internal sort from getipaddrs (#32260)

NEWS.md

@@ -52,6 +52,11 @@ Standard library changes
 
 * Fixed `repr` such that it displays `Time` as it would be entered in Julia ([#32103]).
 
+#### Sockets
+
+* `getipaddrs` returns IP addresses in the order provided by libuv ([#32260]).
+* `getipaddr` prefers to return the first `IPv4` interface address provided by libuv ([#32260]).
+
 #### Statistics
 
 * `mean` now accepts both a function argument and a `dims` keyword ([#31576]).

stdlib/Sockets/src/addrinfo.jl

@@ -234,10 +234,14 @@ ip"fe80::9731:35af:e1c5:6e49"
 """
 function getipaddr(addr_type::Type{T}) where T<:IPAddr
  addrs = getipaddrs(addr_type)
+
  if length(addrs) == 0
  error("No networking interface available")
  end
- return addrs[1]
+
+ # Prefer the first IPv4 address
+ i = something(findfirst(ip -> ip isa IPv4, addrs), 1)
+ return addrs[i]
 end
 getipaddr() = getipaddr(IPv4)
 
@@ -295,14 +299,5 @@ function getipaddrs(addr_type::Type{T}=IPAddr; loopback::Bool=false) where T<:IP
  end
  end
  ccall(:uv_free_interface_addresses, Cvoid, (Ptr{UInt8}, Int32), addr, count)
- sort!(addresses, lt=(addr1,addr2) -> begin
- if addr1 isa IPv4 && addr2 isa IPv6
- return true
- elseif addr1 isa IPv6 && addr2 isa IPv4
- return false
- else
- return addr1 < addr2
- end
- end)
  return addresses
 end