uproctrace

@@ -1,13 +1,19 @@

 #include "write.h"

 #include <fcntl.h>

+#include <stdint.h>

 #include <stdlib.h>

 #include <string.h>

 #include <sys/file.h>

 #include <unistd.h>

+struct lwptpl_event_header_s {

+  uint8_t magic[4]; /**< l w p t */

+  uint8_t size[4]; /**< size of payload in network byte oder */

+} __attribute__((packed));

+

 void lwptpl_write(void const *data, size_t size) {

-  if (! data || ! size) {

+  if (! data || ! size || size > 0xFFFFFFFF) {

     return;

   }

   char const *filename = getenv("LWPTPL_OUTPUT");

@@ -22,6 +28,16 @@ void lwptpl_write(void const *data, size_t size) {

     close(fd);

     return;

   }

+  struct lwptpl_event_header_s lwptpl_event_header = {

+    .magic = { 'l', 'w', 'p', 't' },

+    .size = {

+      (size >> 24) & 0xFF,

+      (size >> 16) & 0xFF,

+      (size >> 8) & 0xFF,

+      size & 0xFF,

+    }

+  };

+  write(fd, &lwptpl_event_header, sizeof(lwptpl_event_header));

   write(fd, data, size);

   flock(fd, LOCK_UN);

   close(fd);

@@ -12,7 +12,5 @@ add_test(

       /bin/false e f 'g h'

     )

     ls -l out.proto

-    protoc --proto_path ${CMAKE_SOURCE_DIR} lwproctrace.proto \

-           --decode lwproctrace.event < out.proto

   "

 )