Redefine constants from errqueue.h. Some header files lag behind the kernel version

src/core/lib/iomgr/internal_errqueue.h

@@ -43,6 +43,27 @@
 namespace grpc_core {
 
 #ifdef GRPC_LINUX_ERRQUEUE
+
+/* Redefining scm_timestamping in the same way that <linux/errqueue.h> defines
+ * it, so that code compiles on systems that don't have it. */
+struct scm_timestamping {
+  struct timespec ts[3];
+};
+/* Also redefine timestamp types */
+/* The timestamp type for when the driver passed skb to NIC, or HW. */
+constexpr int SCM_TSTAMP_SND = 0;
+/* The timestamp type for when data entered the packet scheduler. */
+constexpr int SCM_TSTAMP_SCHED = 1;
+/* The timestamp type for when data acknowledged by peer. */
+constexpr int SCM_TSTAMP_ACK = 2;
+/* Redefine required constants from <linux/net_tstamp.h> */
+constexpr uint32_t SOF_TIMESTAMPING_TX_SOFTWARE = 1u << 1;
+constexpr uint32_t SOF_TIMESTAMPING_SOFTWARE = 1u << 4;
+constexpr uint32_t SOF_TIMESTAMPING_OPT_ID = 1u << 7;
+constexpr uint32_t SOF_TIMESTAMPING_TX_SCHED = 1u << 8;
+constexpr uint32_t SOF_TIMESTAMPING_TX_ACK = 1u << 9;
+constexpr uint32_t SOF_TIMESTAMPING_OPT_TSONLY = 1u << 11;
+
 constexpr uint32_t kTimestampingSocketOptions = SOF_TIMESTAMPING_SOFTWARE |
                                                 SOF_TIMESTAMPING_OPT_ID |
                                                 SOF_TIMESTAMPING_OPT_TSONLY;

src/core/lib/iomgr/tcp_posix.cc

@@ -646,7 +646,8 @@ struct cmsghdr* process_timestamp(grpc_tcp* tcp, msghdr* msg,
     return cmsg;
   }
 
-  auto tss = reinterpret_cast<struct scm_timestamping*>(CMSG_DATA(cmsg));
+  auto tss =
+      reinterpret_cast<struct grpc_core::scm_timestamping*>(CMSG_DATA(cmsg));
   auto serr = reinterpret_cast<struct sock_extended_err*>(CMSG_DATA(next_cmsg));
   if (serr->ee_errno != ENOMSG ||
       serr->ee_origin != SO_EE_ORIGIN_TIMESTAMPING) {

test/core/iomgr/buffer_list_test.cc

@@ -76,7 +76,7 @@ static void TestVerifierCalledOnAck() {
   struct sock_extended_err serr;
   serr.ee_data = 213;
   serr.ee_info = SCM_TSTAMP_ACK;
-  struct scm_timestamping tss;
+  struct grpc_core::scm_timestamping tss;
   tss.ts[0].tv_sec = 123;
   tss.ts[0].tv_nsec = 456;
   grpc_core::grpc_tcp_set_write_timestamps_callback(