diff --git a/staticlibs/native/tcutils/tcutils.cpp b/staticlibs/native/tcutils/tcutils.cpp
new file mode 100644
index 0000000..ca1c63c
--- /dev/null
+++ b/staticlibs/native/tcutils/tcutils.cpp
@@ -0,0 +1,386 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "TcUtils"
+
+#include "tcutils/tcutils.h"
+
+#include "scopeguard.h"
+
+#include <android/log.h>
+#include <arpa/inet.h>
+#include <cerrno>
+#include <cstdio>
+#include <cstring>
+#include <libgen.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/netlink.h>
+#include <linux/pkt_cls.h>
+#include <linux/pkt_sched.h>
+#include <linux/rtnetlink.h>
+#include <net/if.h>
+#include <stdarg.h>
+#include <sys/socket.h>
+#include <sys/utsname.h>
+#include <unistd.h>
+#include <utility>
+
+#define BPF_FD_JUST_USE_INT
+#include <BpfSyscallWrappers.h>
+#undef BPF_FD_JUST_USE_INT
+
+// The maximum length of TCA_BPF_NAME. Sync from net/sched/cls_bpf.c.
+#define CLS_BPF_NAME_LEN 256
+
+// Classifier name. See cls_bpf_ops in net/sched/cls_bpf.c.
+#define CLS_BPF_KIND_NAME "bpf"
+
+namespace android {
+namespace {
+
+void logError(const char *fmt...) {
+  va_list args;
+  va_start(args, fmt);
+  __android_log_vprint(ANDROID_LOG_ERROR, LOG_TAG, fmt, args);
+  va_end(args);
+}
+
+const sockaddr_nl KERNEL_NLADDR = {AF_NETLINK, 0, 0, 0};
+const uint16_t NETLINK_REQUEST_FLAGS = NLM_F_REQUEST | NLM_F_ACK;
+
+int sendAndProcessNetlinkResponse(const void *req, int len) {
+  // TODO: use unique_fd instead of ScopeGuard
+  int fd = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
+  if (fd == -1) {
+    int error = errno;
+    logError("socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE): %d",
+             error);
+    return -error;
+  }
+  auto scopeGuard = base::make_scope_guard([fd] { close(fd); });
+
+  static constexpr int on = 1;
+  if (setsockopt(fd, SOL_NETLINK, NETLINK_CAP_ACK, &on, sizeof(on))) {
+    int error = errno;
+    logError("setsockopt(fd, SOL_NETLINK, NETLINK_CAP_ACK, 1): %d", error);
+    return -error;
+  }
+
+  // this is needed to get valid strace netlink parsing, it allocates the pid
+  if (bind(fd, (const struct sockaddr *)&KERNEL_NLADDR,
+           sizeof(KERNEL_NLADDR))) {
+    int error = errno;
+    logError("bind(fd, {AF_NETLINK, 0, 0}: %d)", error);
+    return -error;
+  }
+
+  // we do not want to receive messages from anyone besides the kernel
+  if (connect(fd, (const struct sockaddr *)&KERNEL_NLADDR,
+              sizeof(KERNEL_NLADDR))) {
+    int error = errno;
+    logError("connect(fd, {AF_NETLINK, 0, 0}): %d", error);
+    return -error;
+  }
+
+  int rv = send(fd, req, len, 0);
+
+  if (rv == -1) {
+    int error = errno;
+    logError("send(fd, req, len, 0) failed: %d", error);
+    return -error;
+  }
+
+  if (rv != len) {
+    logError("send(fd, req, len = %d, 0) returned invalid message size %d", len,
+             rv);
+    return -EMSGSIZE;
+  }
+
+  struct {
+    nlmsghdr h;
+    nlmsgerr e;
+    char buf[256];
+  } resp = {};
+
+  rv = recv(fd, &resp, sizeof(resp), MSG_TRUNC);
+
+  if (rv == -1) {
+    int error = errno;
+    logError("recv() failed: %d", error);
+    return -error;
+  }
+
+  if (rv < (int)NLMSG_SPACE(sizeof(struct nlmsgerr))) {
+    logError("recv() returned short packet: %d", rv);
+    return -EBADMSG;
+  }
+
+  if (resp.h.nlmsg_len != (unsigned)rv) {
+    logError("recv() returned invalid header length: %d != %d",
+             resp.h.nlmsg_len, rv);
+    return -EBADMSG;
+  }
+
+  if (resp.h.nlmsg_type != NLMSG_ERROR) {
+    logError("recv() did not return NLMSG_ERROR message: %d",
+             resp.h.nlmsg_type);
+    return -ENOMSG;
+  }
+
+  if (resp.e.error) {
+    logError("NLMSG_ERROR message return error: %d", resp.e.error);
+  }
+  return resp.e.error; // returns 0 on success
+}
+
+int hardwareAddressType(const char *interface) {
+  int fd = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+  if (fd < 0)
+    return -errno;
+  auto scopeGuard = base::make_scope_guard([fd] { close(fd); });
+
+  struct ifreq ifr = {};
+  // We use strncpy() instead of strlcpy() since kernel has to be able
+  // to handle non-zero terminated junk passed in by userspace anyway,
+  // and this way too long interface names (more than IFNAMSIZ-1 = 15
+  // characters plus terminating NULL) will not get truncated to 15
+  // characters and zero-terminated and thus potentially erroneously
+  // match a truncated interface if one were to exist.
+  strncpy(ifr.ifr_name, interface, sizeof(ifr.ifr_name));
+
+  if (ioctl(fd, SIOCGIFHWADDR, &ifr, sizeof(ifr))) {
+    return -errno;
+  }
+  return ifr.ifr_hwaddr.sa_family;
+}
+
+// -----------------------------------------------------------------------------
+// TODO - just use BpfUtils.h once that is available in sc-mainline-prod and has
+// kernelVersion()
+//
+// In the mean time copying verbatim from:
+//   system/bpf/libbpf_android/include/bpf/BpfUtils.h
+// and
+//   system/bpf/libbpf_android/BpfUtils.cpp
+
+#define KVER(a, b, c) (((a) << 24) + ((b) << 16) + (c))
+
+unsigned kernelVersion() {
+  struct utsname buf;
+  int ret = uname(&buf);
+  if (ret)
+    return 0;
+
+  unsigned kver_major;
+  unsigned kver_minor;
+  unsigned kver_sub;
+  char discard;
+  ret = sscanf(buf.release, "%u.%u.%u%c", &kver_major, &kver_minor, &kver_sub,
+               &discard);
+  // Check the device kernel version
+  if (ret < 3)
+    return 0;
+
+  return KVER(kver_major, kver_minor, kver_sub);
+}
+
+bool isAtLeastKernelVersion(unsigned major, unsigned minor, unsigned sub) {
+  return kernelVersion() >= KVER(major, minor, sub);
+}
+// -----------------------------------------------------------------------------
+
+} // namespace
+
+int isEthernet(const char *iface, bool &isEthernet) {
+  int rv = hardwareAddressType(iface);
+  if (rv < 0) {
+    logError("Get hardware address type of interface %s failed: %s", iface,
+             strerror(-rv));
+    return -rv;
+  }
+
+  // Backwards compatibility with pre-GKI kernels that use various custom
+  // ARPHRD_* for their cellular interface
+  switch (rv) {
+  // ARPHRD_PUREIP on at least some Mediatek Android kernels
+  // example: wembley with 4.19 kernel
+  case 520:
+  // in Linux 4.14+ rmnet support was upstreamed and ARHRD_RAWIP became 519,
+  // but it is 530 on at least some Qualcomm Android 4.9 kernels with rmnet
+  // example: Pixel 3 family
+  case 530:
+    // >5.4 kernels are GKI2.0 and thus upstream compatible, however 5.10
+    // shipped with Android S, so (for safety) let's limit ourselves to
+    // >5.10, ie. 5.11+ as a guarantee we're on Android T+ and thus no
+    // longer need this non-upstream compatibility logic
+    static bool is_pre_5_11_kernel = !isAtLeastKernelVersion(5, 11, 0);
+    if (is_pre_5_11_kernel)
+      return false;
+  }
+
+  switch (rv) {
+  case ARPHRD_ETHER:
+    isEthernet = true;
+    return 0;
+  case ARPHRD_NONE:
+  case ARPHRD_PPP:
+  case ARPHRD_RAWIP:
+    isEthernet = false;
+    return 0;
+  default:
+    logError("Unknown hardware address type %d on interface %s", rv, iface);
+    return -ENOENT;
+  }
+}
+
+// tc filter add dev .. in/egress prio 1 protocol ipv6/ip bpf object-pinned
+// /sys/fs/bpf/... direct-action
+int tcAddBpfFilter(int ifIndex, bool ingress, uint16_t prio, uint16_t proto,
+                   const char *bpfProgPath) {
+  const int bpfFd = bpf::retrieveProgram(bpfProgPath);
+  if (bpfFd == -1) {
+    logError("retrieveProgram failed: %d", errno);
+    return -errno;
+  }
+  auto scopeGuard = base::make_scope_guard([bpfFd] { close(bpfFd); });
+
+  struct {
+    nlmsghdr n;
+    tcmsg t;
+    struct {
+      nlattr attr;
+      // The maximum classifier name length is defined in
+      // tcf_proto_ops in include/net/sch_generic.h.
+      char str[NLMSG_ALIGN(sizeof(CLS_BPF_KIND_NAME))];
+    } kind;
+    struct {
+      nlattr attr;
+      struct {
+        nlattr attr;
+        __u32 u32;
+      } fd;
+      struct {
+        nlattr attr;
+        char str[NLMSG_ALIGN(CLS_BPF_NAME_LEN)];
+      } name;
+      struct {
+        nlattr attr;
+        __u32 u32;
+      } flags;
+    } options;
+  } req = {
+      .n =
+          {
+              .nlmsg_len = sizeof(req),
+              .nlmsg_type = RTM_NEWTFILTER,
+              .nlmsg_flags = NETLINK_REQUEST_FLAGS | NLM_F_EXCL | NLM_F_CREATE,
+          },
+      .t =
+          {
+              .tcm_family = AF_UNSPEC,
+              .tcm_ifindex = ifIndex,
+              .tcm_handle = TC_H_UNSPEC,
+              .tcm_parent = TC_H_MAKE(TC_H_CLSACT, ingress ? TC_H_MIN_INGRESS
+                                                           : TC_H_MIN_EGRESS),
+              .tcm_info =
+                  static_cast<__u32>((static_cast<uint16_t>(prio) << 16) |
+                                     htons(static_cast<uint16_t>(proto))),
+          },
+      .kind =
+          {
+              .attr =
+                  {
+                      .nla_len = sizeof(req.kind),
+                      .nla_type = TCA_KIND,
+                  },
+              .str = CLS_BPF_KIND_NAME,
+          },
+      .options =
+          {
+              .attr =
+                  {
+                      .nla_len = sizeof(req.options),
+                      .nla_type = NLA_F_NESTED | TCA_OPTIONS,
+                  },
+              .fd =
+                  {
+                      .attr =
+                          {
+                              .nla_len = sizeof(req.options.fd),
+                              .nla_type = TCA_BPF_FD,
+                          },
+                      .u32 = static_cast<__u32>(bpfFd),
+                  },
+              .name =
+                  {
+                      .attr =
+                          {
+                              .nla_len = sizeof(req.options.name),
+                              .nla_type = TCA_BPF_NAME,
+                          },
+                      // Visible via 'tc filter show', but
+                      // is overwritten by strncpy below
+                      .str = "placeholder",
+                  },
+              .flags =
+                  {
+                      .attr =
+                          {
+                              .nla_len = sizeof(req.options.flags),
+                              .nla_type = TCA_BPF_FLAGS,
+                          },
+                      .u32 = TCA_BPF_FLAG_ACT_DIRECT,
+                  },
+          },
+  };
+
+  snprintf(req.options.name.str, sizeof(req.options.name.str), "%s:[*fsobj]",
+           basename(bpfProgPath));
+
+  int error = sendAndProcessNetlinkResponse(&req, sizeof(req));
+  return error;
+}
+
+// tc filter del dev .. in/egress prio .. protocol ..
+int tcDeleteFilter(int ifIndex, bool ingress, uint16_t prio, uint16_t proto) {
+  const struct {
+    nlmsghdr n;
+    tcmsg t;
+  } req = {
+      .n =
+          {
+              .nlmsg_len = sizeof(req),
+              .nlmsg_type = RTM_DELTFILTER,
+              .nlmsg_flags = NETLINK_REQUEST_FLAGS,
+          },
+      .t =
+          {
+              .tcm_family = AF_UNSPEC,
+              .tcm_ifindex = ifIndex,
+              .tcm_handle = TC_H_UNSPEC,
+              .tcm_parent = TC_H_MAKE(TC_H_CLSACT, ingress ? TC_H_MIN_INGRESS
+                                                           : TC_H_MIN_EGRESS),
+              .tcm_info =
+                  static_cast<__u32>((static_cast<uint16_t>(prio) << 16) |
+                                     htons(static_cast<uint16_t>(proto))),
+          },
+  };
+
+  return sendAndProcessNetlinkResponse(&req, sizeof(req));
+}
+
+} // namespace android