Move network internal code to internal package

Utilities written to be common across IPv4/IPv6 are not planned to be
available for public use.

https://golang.org/doc/go1.4#internalpackages

PiperOrigin-RevId: 356554862

pkg/tcpip/network/arp/BUILD

@@ -46,7 +46,7 @@ go_test(
     library = ":arp",
     deps = [
         "//pkg/tcpip",
-        "//pkg/tcpip/network/testutil",
+        "//pkg/tcpip/network/internal/testutil",
         "//pkg/tcpip/stack",
     ],
 )

pkg/tcpip/network/arp/stats_test.go

@@ -19,7 +19,7 @@ import (
 	"testing"
 
 	"gvisor.dev/gvisor/pkg/tcpip"
-	"gvisor.dev/gvisor/pkg/tcpip/network/testutil"
+	"gvisor.dev/gvisor/pkg/tcpip/network/internal/testutil"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 )
 

pkg/tcpip/network/internal/fragmentation/BUILD

@@ -22,7 +22,10 @@ go_library(
         "reassembler.go",
         "reassembler_list.go",
     ],
-    visibility = ["//visibility:public"],
+    visibility = [
+        "//pkg/tcpip/network/ipv4:__pkg__",
+        "//pkg/tcpip/network/ipv6:__pkg__",
+    ],
     deps = [
         "//pkg/log",
         "//pkg/sync",
@@ -44,7 +47,7 @@ go_test(
     deps = [
         "//pkg/tcpip/buffer",
         "//pkg/tcpip/faketime",
-        "//pkg/tcpip/network/testutil",
+        "//pkg/tcpip/network/internal/testutil",
         "//pkg/tcpip/stack",
         "@com_github_google_go_cmp//cmp:go_default_library",
     ],

pkg/tcpip/network/internal/fragmentation/fragmentation_test.go

@@ -22,7 +22,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	"gvisor.dev/gvisor/pkg/tcpip/buffer"
 	"gvisor.dev/gvisor/pkg/tcpip/faketime"
-	"gvisor.dev/gvisor/pkg/tcpip/network/testutil"
+	"gvisor.dev/gvisor/pkg/tcpip/network/internal/testutil"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 )
 

pkg/tcpip/network/internal/ip/BUILD

@@ -4,8 +4,16 @@ package(licenses = ["notice"])
 
 go_library(
     name = "ip",
-    srcs = ["duplicate_address_detection.go"],
-    visibility = ["//visibility:public"],
+    srcs = [
+        "duplicate_address_detection.go",
+        "generic_multicast_protocol.go",
+        "stats.go",
+    ],
+    visibility = [
+        "//pkg/tcpip/network/arp:__pkg__",
+        "//pkg/tcpip/network/ipv4:__pkg__",
+        "//pkg/tcpip/network/ipv6:__pkg__",
+    ],
     deps = [
         "//pkg/sync",
         "//pkg/tcpip",
@@ -16,7 +24,10 @@ go_library(
 go_test(
     name = "ip_x_test",
     size = "small",
-    srcs = ["duplicate_address_detection_test.go"],
+    srcs = [
+        "duplicate_address_detection_test.go",
+        "generic_multicast_protocol_test.go",
+    ],
     deps = [
         ":ip",
         "//pkg/sync",

pkg/tcpip/network/internal/ip/generic_multicast_protocol_test.go

@@ -23,17 +23,10 @@ import (
 	"gvisor.dev/gvisor/pkg/sync"
 	"gvisor.dev/gvisor/pkg/tcpip"
 	"gvisor.dev/gvisor/pkg/tcpip/faketime"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ip"
+	"gvisor.dev/gvisor/pkg/tcpip/network/internal/ip"
 )
 
-const (
-	addr1 = tcpip.Address("\x01")
-	addr2 = tcpip.Address("\x02")
-	addr3 = tcpip.Address("\x03")
-	addr4 = tcpip.Address("\x04")
-
-	maxUnsolicitedReportDelay = time.Second
-)
+const maxUnsolicitedReportDelay = time.Second
 
 var _ ip.MulticastGroupProtocol = (*mockMulticastGroupProtocol)(nil)
 

pkg/tcpip/network/internal/testutil/BUILD

@@ -10,7 +10,7 @@ go_library(
     ],
     visibility = [
         "//pkg/tcpip/network/arp:__pkg__",
-        "//pkg/tcpip/network/fragmentation:__pkg__",
+        "//pkg/tcpip/network/internal/fragmentation:__pkg__",
         "//pkg/tcpip/network/ipv4:__pkg__",
         "//pkg/tcpip/network/ipv6:__pkg__",
     ],

pkg/tcpip/network/ip/BUILD

@@ -1,29 +0,0 @@
-load("//tools:defs.bzl", "go_library", "go_test")
-
-package(licenses = ["notice"])
-
-go_library(
-    name = "ip",
-    srcs = [
-        "generic_multicast_protocol.go",
-        "stats.go",
-    ],
-    visibility = ["//visibility:public"],
-    deps = [
-        "//pkg/sync",
-        "//pkg/tcpip",
-    ],
-)
-
-go_test(
-    name = "ip_test",
-    size = "small",
-    srcs = ["generic_multicast_protocol_test.go"],
-    deps = [
-        ":ip",
-        "//pkg/sync",
-        "//pkg/tcpip",
-        "//pkg/tcpip/faketime",
-        "@com_github_google_go_cmp//cmp:go_default_library",
-    ],
-)

pkg/tcpip/network/ipv4/BUILD

@@ -17,9 +17,9 @@ go_library(
         "//pkg/tcpip/buffer",
         "//pkg/tcpip/header",
         "//pkg/tcpip/header/parse",
-        "//pkg/tcpip/network/fragmentation",
         "//pkg/tcpip/network/hash",
-        "//pkg/tcpip/network/ip",
+        "//pkg/tcpip/network/internal/fragmentation",
+        "//pkg/tcpip/network/internal/ip",
         "//pkg/tcpip/stack",
     ],
 )
@@ -40,8 +40,8 @@ go_test(
         "//pkg/tcpip/link/channel",
         "//pkg/tcpip/link/sniffer",
         "//pkg/tcpip/network/arp",
+        "//pkg/tcpip/network/internal/testutil",
         "//pkg/tcpip/network/ipv4",
-        "//pkg/tcpip/network/testutil",
         "//pkg/tcpip/stack",
         "//pkg/tcpip/transport/icmp",
         "//pkg/tcpip/transport/raw",
@@ -59,7 +59,7 @@ go_test(
     library = ":ipv4",
     deps = [
         "//pkg/tcpip",
-        "//pkg/tcpip/network/testutil",
+        "//pkg/tcpip/network/internal/testutil",
         "//pkg/tcpip/stack",
     ],
 )

pkg/tcpip/network/ipv4/igmp.go

@@ -22,7 +22,7 @@ import (
 	"gvisor.dev/gvisor/pkg/tcpip"
 	"gvisor.dev/gvisor/pkg/tcpip/buffer"
 	"gvisor.dev/gvisor/pkg/tcpip/header"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ip"
+	"gvisor.dev/gvisor/pkg/tcpip/network/internal/ip"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 )
 

pkg/tcpip/network/ipv4/ipv4.go

@@ -27,8 +27,8 @@ import (
 	"gvisor.dev/gvisor/pkg/tcpip/buffer"
 	"gvisor.dev/gvisor/pkg/tcpip/header"
 	"gvisor.dev/gvisor/pkg/tcpip/header/parse"
-	"gvisor.dev/gvisor/pkg/tcpip/network/fragmentation"
 	"gvisor.dev/gvisor/pkg/tcpip/network/hash"
+	"gvisor.dev/gvisor/pkg/tcpip/network/internal/fragmentation"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 )
 

pkg/tcpip/network/ipv4/ipv4_test.go

@@ -34,8 +34,8 @@ import (
 	"gvisor.dev/gvisor/pkg/tcpip/link/channel"
 	"gvisor.dev/gvisor/pkg/tcpip/link/sniffer"
 	"gvisor.dev/gvisor/pkg/tcpip/network/arp"
+	"gvisor.dev/gvisor/pkg/tcpip/network/internal/testutil"
 	"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
-	"gvisor.dev/gvisor/pkg/tcpip/network/testutil"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 	"gvisor.dev/gvisor/pkg/tcpip/transport/icmp"
 	"gvisor.dev/gvisor/pkg/tcpip/transport/raw"

pkg/tcpip/network/ipv4/stats.go

@@ -16,7 +16,7 @@ package ipv4
 
 import (
 	"gvisor.dev/gvisor/pkg/tcpip"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ip"
+	"gvisor.dev/gvisor/pkg/tcpip/network/internal/ip"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 )