[llvm] [libc][bazel] Add missing arpa/inet functions and tests (PR #210310)

[Pavel Labath via llvm-commits]

https://github.com/labath created https://github.com/llvm/llvm-project/pull/210310

Add bazel build targets for the remaining arpa/inet functions (inet_addr, inet_aton, inet_ntoa, and inet_ntop) along with their unit tests and supporting targets (__support_net_address, headers, and proxy types).

Assisted by Gemini.

>From ef5903b5fba763ff74f02d96b7d8551e1993ce50 Mon Sep 17 00:00:00 2001
From: Pavel Labath <pavel at labath.sk>
Date: Fri, 17 Jul 2026 11:39:44 +0000
Subject: [PATCH] [libc][bazel] Add missing arpa/inet functions and tests

Add bazel build targets for the remaining arpa/inet functions (inet_addr,
inet_aton, inet_ntoa, and inet_ntop) along with their unit tests and supporting
targets (__support_net_address, headers, and proxy types).

Assisted by Gemini.
---
 .../llvm-project-overlay/libc/BUILD.bazel     | 110 ++++++++++++++++++
 .../libc/test/src/arpa/inet/BUILD.bazel       |  43 +++++++
 2 files changed, 153 insertions(+)

diff --git a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
index 0c4b759e331d9..d8f4cfc546acd 100644
--- a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
@@ -505,6 +505,19 @@ libc_support_library(
     ],
 )
 
+libc_support_library(
+    name = "llvm_libc_macros_inet_address_macros",
+    hdrs = ["include/llvm-libc-macros/inet-address-macros.h"],
+)
+
+libc_support_library(
+    name = "hdr_inet_address_macros",
+    hdrs = ["hdr/inet-address-macros.h"],
+    deps = [
+        ":llvm_libc_macros_inet_address_macros",
+    ],
+)
+
 libc_support_library(
     name = "hdr_errno_macros",
     hdrs = ["hdr/errno_macros.h"],
@@ -783,6 +796,21 @@ libc_support_library(
     hdrs = ["hdr/types/socklen_t.h"],
 )
 
+libc_support_library(
+    name = "types_in_addr_t",
+    hdrs = ["hdr/types/in_addr_t.h"],
+)
+
+libc_support_library(
+    name = "types_struct_in_addr",
+    hdrs = ["hdr/types/struct_in_addr.h"],
+)
+
+libc_support_library(
+    name = "types_struct_in6_addr",
+    hdrs = ["hdr/types/struct_in6_addr.h"],
+)
+
 libc_support_library(
     name = "types_struct_sockaddr",
     hdrs = ["hdr/types/struct_sockaddr.h"],
@@ -3546,6 +3574,66 @@ libc_function(
     ],
 )
 
+libc_function(
+    name = "inet_addr",
+    srcs = ["src/arpa/inet/inet_addr.cpp"],
+    hdrs = ["src/arpa/inet/inet_addr.h"],
+    deps = [
+        ":__support_common",
+        ":__support_cpp_optional",
+        ":__support_macros_config",
+        ":__support_net_address",
+        ":hdr_netinet_in_macros",
+        ":types_in_addr_t",
+    ],
+)
+
+libc_function(
+    name = "inet_aton",
+    srcs = ["src/arpa/inet/inet_aton.cpp"],
+    hdrs = ["src/arpa/inet/inet_aton.h"],
+    deps = [
+        ":__support_common",
+        ":__support_cpp_optional",
+        ":__support_macros_config",
+        ":__support_net_address",
+        ":types_struct_in_addr",
+    ],
+)
+
+libc_function(
+    name = "inet_ntoa",
+    srcs = ["src/arpa/inet/inet_ntoa.cpp"],
+    hdrs = ["src/arpa/inet/inet_ntoa.h"],
+    deps = [
+        ":__support_common",
+        ":__support_cpp_span",
+        ":__support_macros_config",
+        ":__support_net_address",
+        ":hdr_inet_address_macros",
+        ":types_struct_in_addr",
+    ],
+)
+
+libc_function(
+    name = "inet_ntop",
+    srcs = ["src/arpa/inet/inet_ntop.cpp"],
+    hdrs = ["src/arpa/inet/inet_ntop.h"],
+    deps = [
+        ":__support_common",
+        ":__support_cpp_span",
+        ":__support_libc_errno",
+        ":__support_macros_config",
+        ":__support_macros_null_check",
+        ":__support_net_address",
+        ":hdr_errno_macros",
+        ":hdr_sys_socket_macros",
+        ":types_socklen_t",
+        ":types_struct_in6_addr",
+        ":types_struct_in_addr",
+    ],
+)
+
 libc_function(
     name = "ntohl",
     srcs = ["src/arpa/inet/ntohl.cpp"],
@@ -9862,6 +9950,28 @@ libc_support_library(
     ],
 )
 
+############################### __support/net #################################
+
+libc_support_library(
+    name = "__support_net_address",
+    srcs = ["src/__support/net/address.cpp"],
+    hdrs = ["src/__support/net/address.h"],
+    deps = [
+        ":__support_common",
+        ":__support_cpp_optional",
+        ":__support_cpp_span",
+        ":__support_ctype_utils",
+        ":__support_libc_assert",
+        ":__support_macros_config",
+        ":__support_str_to_integer",
+        ":hdr_inet_address_macros",
+        ":string_memory_utils",
+        ":types_in_addr_t",
+        ":types_struct_in6_addr",
+        ":types_struct_in_addr",
+    ],
+)
+
 ############################### complex targets ################################
 
 libc_function(
diff --git a/utils/bazel/llvm-project-overlay/libc/test/src/arpa/inet/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/test/src/arpa/inet/BUILD.bazel
index 2f1bcd23ae0a7..29ef2cf4b1fc4 100644
--- a/utils/bazel/llvm-project-overlay/libc/test/src/arpa/inet/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/test/src/arpa/inet/BUILD.bazel
@@ -30,6 +30,49 @@ libc_test(
     ],
 )
 
+libc_test(
+    name = "inet_addr_test",
+    srcs = ["inet_addr_test.cpp"],
+    deps = [
+        "//libc:__support_common",
+        "//libc:htonl",
+        "//libc:inet_addr",
+    ],
+)
+
+libc_test(
+    name = "inet_aton_test",
+    srcs = ["inet_aton_test.cpp"],
+    deps = [
+        "//libc:__support_common",
+        "//libc:htonl",
+        "//libc:inet_aton",
+    ],
+)
+
+libc_test(
+    name = "inet_ntoa_test",
+    srcs = ["inet_ntoa_test.cpp"],
+    deps = [
+        "//libc:__support_common",
+        "//libc:inet_ntoa",
+        "//libc:types_struct_in_addr",
+    ],
+)
+
+libc_test(
+    name = "inet_ntop_test",
+    srcs = ["inet_ntop_test.cpp"],
+    deps = [
+        "//libc:__support_common",
+        "//libc:hdr_errno_macros",
+        "//libc:hdr_sys_socket_macros",
+        "//libc:inet_ntop",
+        "//libc:types_struct_in6_addr",
+        "//libc:types_struct_in_addr",
+    ],
+)
+
 libc_test(
     name = "ntohl_test",
     srcs = ["ntohl_test.cpp"],