Revert "syscall: add getifaddrs to os syscalls (envoyproxy#18513)"

This reverts commit fc04382.

Signed-off-by: Mike Schore <mike.schore@gmail.com>

envoy/api/os_sys_calls.h

@@ -190,21 +190,6 @@ class OsSysCalls {
    * @see man TCP_INFO. Get the tcp info for the socket.
    */
   virtual SysCallBoolResult socketTcpInfo(os_fd_t sockfd, EnvoyTcpInfo* tcp_info) PURE;
-
-  /**
-   * return true if the OS supports getifaddrs.
-   */
-  virtual bool supportsGetifaddrs() const PURE;
-
-  /**
-   * @see man getifaddrs
-   */
-  virtual SysCallIntResult getifaddrs(ifaddrs** ifap) PURE;
-
-  /**
-   * @see man getifaddrs
-   */
-  virtual void freeifaddrs(ifaddrs* ifp) PURE;
 };
 
 using OsSysCallsPtr = std::unique_ptr<OsSysCalls>;

envoy/common/platform.h

@@ -293,20 +293,18 @@ struct mmsghdr {
 };
 #endif
 
-// https://android.googlesource.com/platform/prebuilts/ndk/+/dev/platform/sysroot/usr/include/ifaddrs.h
-#if defined(WIN32) || (defined(__ANDROID_API__) && __ANDROID_API__ < 24)
-// Posix structure necessary for getifaddrs definition.
-struct ifaddrs {
-  struct ifaddrs* ifa_next;
-  char* ifa_name;
-  unsigned int ifa_flags;
-  struct sockaddr* ifa_addr;
-  struct sockaddr* ifa_netmask;
-  struct sockaddr* ifa_dstaddr;
-  void* ifa_data;
-};
+#define SUPPORTS_GETIFADDRS
+#ifdef WIN32
+#undef SUPPORTS_GETIFADDRS
 #endif
 
+// https://android.googlesource.com/platform/prebuilts/ndk/+/dev/platform/sysroot/usr/include/ifaddrs.h
+#ifdef __ANDROID_API__
+#if __ANDROID_API__ < 24
+#undef SUPPORTS_GETIFADDRS
+#endif // __ANDROID_API__ < 24
+#endif // ifdef __ANDROID_API__
+
 // TODO: Remove once bazel supports NDKs > 21
 #define SUPPORTS_CPP_17_CONTIGUOUS_ITERATOR
 #ifdef __ANDROID_API__

source/common/api/posix/os_sys_calls_impl.cc

@@ -282,20 +282,5 @@ SysCallBoolResult OsSysCallsImpl::socketTcpInfo([[maybe_unused]] os_fd_t sockfd,
   return {false, EOPNOTSUPP};
 }
 
-bool OsSysCallsImpl::supportsGetifaddrs() const {
-// https://android.googlesource.com/platform/prebuilts/ndk/+/dev/platform/sysroot/usr/include/ifaddrs.h
-#if defined(__ANDROID_API__) && __ANDROID_API__ < 24
-  return false;
-#endif
-  return true;
-}
-
-SysCallIntResult OsSysCallsImpl::getifaddrs(struct ifaddrs** ifap) {
-  const int rc = ::getifaddrs(ifap);
-  return {rc, rc != -1 ? 0 : errno};
-}
-
-void OsSysCallsImpl::freeifaddrs(struct ifaddrs* ifp) { ::freeifaddrs(ifp); }
-
 } // namespace Api
 } // namespace Envoy

source/common/api/posix/os_sys_calls_impl.h

@@ -49,9 +49,6 @@ class OsSysCallsImpl : public OsSysCalls {
   SysCallSocketResult duplicate(os_fd_t oldfd) override;
   SysCallSocketResult accept(os_fd_t socket, sockaddr* addr, socklen_t* addrlen) override;
   SysCallBoolResult socketTcpInfo(os_fd_t sockfd, EnvoyTcpInfo* tcp_info) override;
-  bool supportsGetifaddrs() const override;
-  SysCallIntResult getifaddrs(struct ifaddrs** ifap) override;
-  void freeifaddrs(struct ifaddrs* ifp) override;
 };
 
 using OsSysCallsSingleton = ThreadSafeSingleton<OsSysCallsImpl>;

source/common/api/win32/os_sys_calls_impl.cc

@@ -404,9 +404,5 @@ SysCallBoolResult OsSysCallsImpl::socketTcpInfo([[maybe_unused]] os_fd_t sockfd,
   return {false, WSAEOPNOTSUPP};
 }
 
-SysCallIntResult OsSysCallsImpl::getifaddrs(struct ifaddrs**) { NOT_IMPLEMENTED_GCOVR_EXCL_LINE; }
-
-void OsSysCallsImpl::freeifaddrs(struct ifaddrs*) { NOT_IMPLEMENTED_GCOVR_EXCL_LINE; }
-
 } // namespace Api
 } // namespace Envoy

source/common/api/win32/os_sys_calls_impl.h

@@ -51,9 +51,6 @@ class OsSysCallsImpl : public OsSysCalls {
   SysCallSocketResult duplicate(os_fd_t oldfd) override;
   SysCallSocketResult accept(os_fd_t socket, sockaddr* addr, socklen_t* addrlen) override;
   SysCallBoolResult socketTcpInfo(os_fd_t sockfd, EnvoyTcpInfo* tcp_info) override;
-  bool supportsGetifaddrs() const override { return false; }
-  SysCallIntResult getifaddrs(struct ifaddrs** ifap) override;
-  void freeifaddrs(struct ifaddrs* ifp) override;
 };
 
 using OsSysCallsSingleton = ThreadSafeSingleton<OsSysCallsImpl>;

source/common/network/utility.cc

@@ -239,36 +239,35 @@ void Utility::throwWithMalformedIp(absl::string_view ip_address) {
 // need to be updated in the future. Discussion can be found at Github issue #939.
 Address::InstanceConstSharedPtr Utility::getLocalAddress(const Address::IpVersion version) {
   Address::InstanceConstSharedPtr ret;
-  if (Api::OsSysCallsSingleton::get().supportsGetifaddrs()) {
-    struct ifaddrs* ifaddr;
-    struct ifaddrs* ifa;
+#ifdef SUPPORTS_GETIFADDRS
+  struct ifaddrs* ifaddr;
+  struct ifaddrs* ifa;
 
-    const Api::SysCallIntResult rc = Api::OsSysCallsSingleton::get().getifaddrs(&ifaddr);
-    RELEASE_ASSERT(!rc.return_value_, fmt::format("getiffaddrs error: {}", rc.errno_));
+  const int rc = getifaddrs(&ifaddr);
+  RELEASE_ASSERT(!rc, "");
 
-    // man getifaddrs(3)
-    for (ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next) {
-      if (ifa->ifa_addr == nullptr) {
-        continue;
-      }
+  // man getifaddrs(3)
+  for (ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next) {
+    if (ifa->ifa_addr == nullptr) {
+      continue;
+    }
 
-      if ((ifa->ifa_addr->sa_family == AF_INET && version == Address::IpVersion::v4) ||
-          (ifa->ifa_addr->sa_family == AF_INET6 && version == Address::IpVersion::v6)) {
-        const struct sockaddr_storage* addr =
-            reinterpret_cast<const struct sockaddr_storage*>(ifa->ifa_addr);
-        ret = Address::addressFromSockAddrOrThrow(*addr, (version == Address::IpVersion::v4)
-                                                             ? sizeof(sockaddr_in)
-                                                             : sizeof(sockaddr_in6));
-        if (!isLoopbackAddress(*ret)) {
-          break;
-        }
+    if ((ifa->ifa_addr->sa_family == AF_INET && version == Address::IpVersion::v4) ||
+        (ifa->ifa_addr->sa_family == AF_INET6 && version == Address::IpVersion::v6)) {
+      const struct sockaddr_storage* addr =
+          reinterpret_cast<const struct sockaddr_storage*>(ifa->ifa_addr);
+      ret = Address::addressFromSockAddrOrThrow(
+          *addr, (version == Address::IpVersion::v4) ? sizeof(sockaddr_in) : sizeof(sockaddr_in6));
+      if (!isLoopbackAddress(*ret)) {
+        break;
       }
     }
+  }
 
-    if (ifaddr) {
-      Api::OsSysCallsSingleton::get().freeifaddrs(ifaddr);
-    }
+  if (ifaddr) {
+    freeifaddrs(ifaddr);
   }
+#endif
 
   // If the local address is not found above, then return the loopback address by default.
   if (ret == nullptr) {

tools/spelling/spelling_dictionary.txt

@@ -11,7 +11,6 @@ ALS
 AMZ
 APC
 API
-ARRAYSIZE
 ARN
 ASAN
 ASCII
@@ -815,7 +814,6 @@ megamiss
 mem
 memcmp
 memcpy
-memset
 memoize
 mergeable
 messagename