diff --git a/unix/ifreq_linux.go b/unix/ifreq_linux.go
index fd3eecc..934af31 100644
--- a/unix/ifreq_linux.go
+++ b/unix/ifreq_linux.go
@@ -41,7 +41,7 @@
 	return &Ifreq{raw: ifr}, nil
 }
 
-// TODO(mdlayher): get/set methods for sockaddr, char array, etc.
+// TODO(mdlayher): get/set methods for hardware address sockaddr, char array, etc.
 
 // Name returns the interface name associated with the Ifreq.
 func (ifr *Ifreq) Name() string {
@@ -54,6 +54,46 @@
 	return BytePtrToString(&ifr.raw.Ifrn[0])
 }
 
+// According to netdevice(7), only AF_INET addresses are returned for numerous
+// sockaddr ioctls. For convenience, we expose these as Inet4Addr since the Port
+// field and other data is always empty.
+
+// Inet4Addr returns the Ifreq union data from an embedded sockaddr as a C
+// in_addr/Go []byte (4-byte IPv4 address) value. If the sockaddr family is not
+// AF_INET, an error is returned.
+func (ifr *Ifreq) Inet4Addr() ([]byte, error) {
+	raw := *(*RawSockaddrInet4)(unsafe.Pointer(&ifr.raw.Ifru[:SizeofSockaddrInet4][0]))
+	if raw.Family != AF_INET {
+		// Cannot safely interpret raw.Addr bytes as an IPv4 address.
+		return nil, EINVAL
+	}
+
+	return raw.Addr[:], nil
+}
+
+// SetInet4Addr sets a C in_addr/Go []byte (4-byte IPv4 address) value in an
+// embedded sockaddr within the Ifreq's union data. v must be 4 bytes in length
+// or an error will be returned.
+func (ifr *Ifreq) SetInet4Addr(v []byte) error {
+	if len(v) != 4 {
+		return EINVAL
+	}
+
+	var addr [4]byte
+	copy(addr[:], v)
+
+	ifr.clear()
+	*(*RawSockaddrInet4)(
+		unsafe.Pointer(&ifr.raw.Ifru[:SizeofSockaddrInet4][0]),
+	) = RawSockaddrInet4{
+		// Always set IP family as ioctls would require it anyway.
+		Family: AF_INET,
+		Addr:   addr,
+	}
+
+	return nil
+}
+
 // Uint16 returns the Ifreq union data as a C short/Go uint16 value.
 func (ifr *Ifreq) Uint16() uint16 {
 	return *(*uint16)(unsafe.Pointer(&ifr.raw.Ifru[:2][0]))
diff --git a/unix/ifreq_linux_test.go b/unix/ifreq_linux_test.go
index 52640ac..7a6d56c 100644
--- a/unix/ifreq_linux_test.go
+++ b/unix/ifreq_linux_test.go
@@ -8,6 +8,8 @@
 package unix
 
 import (
+	"bytes"
+	"net"
 	"testing"
 	"unsafe"
 )
@@ -74,6 +76,48 @@
 	}
 }
 
+func TestIfreqInet4Addr(t *testing.T) {
+	ifr := testIfreq(t)
+	in := net.IPv4(192, 0, 2, 1).To4()
+	if err := ifr.SetInet4Addr(in); err != nil {
+		t.Fatalf("failed to set ifreq IPv4 address: %v", err)
+	}
+
+	// Store fixed offset data (AF_INET, IPv4 address) within underlying
+	// sockaddr bytes. Everything else should be zeroed.
+	want := ifreqUnion{4: 192, 5: 0, 6: 2, 7: 1}
+	if isBigEndian {
+		want[0] = 0x00
+		want[1] = 0x02
+	} else {
+		want[0] = 0x02
+		want[1] = 0x00
+	}
+
+	if got := ifr.raw.Ifru; want != got {
+		t.Fatalf("unexpected ifreq sockaddr bytes:\n got: % #x\nwant: % #x", got, want)
+	}
+
+	got, err := ifr.Inet4Addr()
+	if err != nil {
+		t.Fatalf("failed to get ifreq IPv4 address: %v", err)
+	}
+	if !bytes.Equal(in, got) {
+		t.Fatalf("unexpected ifreq IPv4 address:\n got: % #x\nwant: % #x", got, in)
+	}
+
+	// Invalid input, wrong length.
+	if err := ifr.SetInet4Addr([]byte{0xff}); err == nil {
+		t.Fatal("expected an error setting invalid IPv4 address, but none occurred")
+	}
+
+	// Invalid output, AF_INET is only set by SetInet4Addr input.
+	ifr.SetUint32(0xffffffff)
+	if _, err := ifr.Inet4Addr(); err == nil {
+		t.Fatal("expected an error getting invalid IPv4 address, but none occurred")
+	}
+}
+
 func TestIfreqUint16(t *testing.T) {
 	ifr := testIfreq(t)
 	const in = 0x0102
diff --git a/unix/syscall_linux_test.go b/unix/syscall_linux_test.go
index 886cd3c..dd0fa6a 100644
--- a/unix/syscall_linux_test.go
+++ b/unix/syscall_linux_test.go
@@ -158,9 +158,59 @@
 			t.Fatalf("unexpected interface name for index %d: got: %q, want: %q",
 				ifi.Index, got, want)
 		}
+
+		wantIP, ok := firstIPv4(t, &ifi)
+		if err := unix.IoctlIfreq(s, unix.SIOCGIFADDR, ifr); err != nil {
+			// Interface may have no assigned IPv4 address.
+			if err != unix.EADDRNOTAVAIL {
+				t.Fatalf("failed to get IPv4 address for %q: %v", ifi.Name, err)
+			}
+
+			// But if we found an address via rtnetlink, we should expect the
+			// ioctl to return one.
+			if ok {
+				t.Fatalf("found IPv4 address %q for %q but ioctl returned none", wantIP, ifi.Name)
+			}
+
+			continue
+		}
+
+		// Found an address, compare it directly.
+		addr, err := ifr.Inet4Addr()
+		if err != nil {
+			t.Fatalf("failed to get ifreq IPv4 address: %v", err)
+		}
+
+		if want, got := wantIP, addr; !want.Equal(got) {
+			t.Fatalf("unexpected first IPv4 address for %q: got: %q, want: %q",
+				ifi.Name, got, want)
+		}
 	}
 }
 
+// firstIPv4 reports whether the interface has an IPv4 address assigned,
+// returning the first discovered address.
+func firstIPv4(t *testing.T, ifi *net.Interface) (net.IP, bool) {
+	t.Helper()
+
+	addrs, err := ifi.Addrs()
+	if err != nil {
+		t.Fatalf("failed to get interface %q addresses: %v", ifi.Name, err)
+	}
+
+	for _, a := range addrs {
+		// Only want valid IPv4 addresses.
+		ipn, ok := a.(*net.IPNet)
+		if !ok || ipn.IP.To4() == nil {
+			continue
+		}
+
+		return ipn.IP, true
+	}
+
+	return nil, false
+}
+
 func TestPpoll(t *testing.T) {
 	if runtime.GOOS == "android" {
 		t.Skip("mkfifo syscall is not available on android, skipping test")