tinygo-org/net
1
0
Fork 0
mirror of https://github.com/tinygo-org/net.git synced 2026-09-10 06:29:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

net: support IPv6 in the host netdev and TCP/UDP plumbing

Browse Source 
Make the net package address-family aware instead of IPv4-only: DialTCP,
listenTCP and DialUDP now choose AF_INET or AF_INET6 from the target address
(socketFamily), the "only ipv4 supported" guard is replaced by a 4-or-16 byte
check, and "tcp6"/"udp6" network names are accepted.

In the host netdev, sockaddrFromParts builds a SockaddrInet6 for IPv6 addresses
(SockaddrInet4 otherwise), Accept decodes both families, GetHostByName and the
/etc/hosts lookup accept IPv6, and the stub resolver now queries AAAA after A.
Name resolution still prefers IPv4, so the "4"/"6" suffix is advisory for host
names; this is documented on Dial/Listen. Link-local IPv6 zones are not mapped
to a scope id.

Verified on linux/amd64 with tinygo: IPv6 loopback Listen/Accept/Dial over
[::1], AAAA fallback for an IPv6-only host name, and IPv4 behaviour unchanged.
This commit is contained in:
Moses Narrow
2026-06-23 18:19:40 -05:00
committed by Ron Evans
parent 7bf471a0a9
commit 2be2e34090
5 changed files with 105 additions and 53 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tcpsock.go
+6 -6
View File
@@ -94,7 +94,7 @@ func (a *TCPAddr) opAddr() Addr {
func ResolveTCPAddr(network, address string) (*TCPAddr, error) {
switch network {
case "tcp", "tcp4":
case "tcp", "tcp4", "tcp6":
default:
return nil, fmt.Errorf("Network '%s' not supported", network)
}
@@ -161,7 +161,7 @@ type TCPConn struct {
func DialTCP(network string, laddr, raddr *TCPAddr) (*TCPConn, error) {
switch network {
case "tcp", "tcp4":
case "tcp", "tcp4", "tcp6":
default:
return nil, errors.New("Network not supported: '" + network + "'")
}
@@ -174,11 +174,11 @@ func DialTCP(network string, laddr, raddr *TCPAddr) (*TCPConn, error) {
if raddr.IP.IsUnspecified() {
return nil, errors.New("Sorry, localhost isn't available on Tinygo")
} else if len(raddr.IP) != 4 {
return nil, errors.New("only ipv4 supported")
} else if len(raddr.IP) != 4 && len(raddr.IP) != 16 {
return nil, errors.New("invalid IP address")
}
fd, err := netdev.Socket(_AF_INET, _SOCK_STREAM, _IPPROTO_TCP)
fd, err := netdev.Socket(socketFamily(raddr.IP), _SOCK_STREAM, _IPPROTO_TCP)
if err != nil {
return nil, err
}
@@ -379,7 +379,7 @@ func (l *listener) Addr() Addr {
}
func listenTCP(laddr *TCPAddr) (Listener, error) {
fd, err := netdev.Socket(_AF_INET, _SOCK_STREAM, _IPPROTO_TCP)
fd, err := netdev.Socket(socketFamily(laddr.IP), _SOCK_STREAM, _IPPROTO_TCP)
if err != nil {
return nil, err
}