Merge remote-tracking branch 'origin/T-macpdu-fix' into integration_2026_w08 (!3924)

T: macpdu2wireshark: gentle exit (and some other minor work in the T tracer)

When outputting to a file, typing ctrl+c exits the program without
calling fclose(), leading to loss of traces in the output file.

Let's intercept ctrl+c and exit gently, calling fclose().

Also include a small fix for compilation of _check_vcd, some work on
extract and hacks/plot-ofdm, minor stuff.

common/utils/T/Makefile

@@ -21,7 +21,7 @@ incgen/T_IDs.h: $(GENIDS) T_messages.txt
 	./$(GENIDS) T_messages.txt incgen/T_IDs.h
 
 check_vcd: incgen/T_IDs.h incgen/T_messages.txt.h
-	gcc -Wall -I. -I.. -I../itti -I../../../openair2/COMMON -Itracer -o _check_vcd check_vcd.c tracer/database.c tracer/utils.c -lm -pthread
+	gcc -Wall -I. -I.. -I../../.. -I../itti -I../../../openair2/COMMON -Itracer -Iincgen -o _check_vcd check_vcd.c tracer/database.c tracer/utils.c -lm -pthread
 	./_check_vcd T_messages.txt ../LOG/vcd_signal_dumper.h || (rm -rf ./_check_vcd ./incgen && false)
 	rm -f ./_check_vcd
 

common/utils/T/tracer/extract.c

@@ -18,6 +18,7 @@ void usage(void)
 "                              (you can use several -f options)\n"
 "    -after <raw time> <nsec>  'event' time has to be greater than this\n"
 "    -count <n>                dump 'n' matching events (less if EOF reached)\n"
+"                              (default: no limit)\n"
   );
   exit(1);
 }
@@ -53,7 +54,7 @@ int main(int n, char **v)
   int filter_count = 0;
   int buffer_arg;
   int found;
-  int count = 1;
+  int count = -1;
   int check_time = 0;
   time_t sec = 0;  /* initialization not necessary but gcc is not happy */
   long nsec = 0;   /* initialization not necessary but gcc is not happy */
@@ -132,12 +133,12 @@ int main(int n, char **v)
     if (fwrite(e.e[buffer_arg].b, e.e[buffer_arg].bsize, 1, out) != 1)
       { perror(output_file); exit(1); }
     found++;
-    if (found == count)
+    if (count != -1 && found == count)
       break;
   }
 
   if (found == 0) printf("ERROR: event not found\n");
-  if (found != count)
+  if (count != -1 && found != count)
     printf("WARNING: dumped %d events (wanted %d)\n", found, count);
 
   fclose(out);

common/utils/T/tracer/hacks/plot-ofdm.c

@@ -135,7 +135,7 @@ int main(int n, char **v)
   int input_is_float = 0;
   int no_fft = 0;
   int delay = 0;
-  int skip = 0;
+  uint64_t skip = 0;
   int symbols_per_subframe;
   long sampling_rate = 61440000;
   int mu = 1;
@@ -152,7 +152,7 @@ int main(int n, char **v)
     if (!strcmp(v[i], "-srate")) { if (i>n-2) usage(); sampling_rate = atol(v[++i]); continue; }
     if (!strcmp(v[i], "-prb")) { if (i>n-2) usage(); prb = atoi(v[++i]); continue; }
     if (!strcmp(v[i], "-mu")) { if (i>n-2) usage(); mu = atoi(v[++i]); continue; }
-    if (!strcmp(v[i], "-skip")) { if (i>n-2) usage(); skip = atoi(v[++i]); continue; }
+    if (!strcmp(v[i], "-skip")) { if (i>n-2) usage(); skip = atoll(v[++i]); continue; }
     usage();
   }
 
@@ -222,14 +222,14 @@ int main(int n, char **v)
   int back_color = 0;
   int hpixel = 0;
 
-  if (skip) {
-    if (input_is_float) {
-      float intime[skip * 2];
-      if (fread(intime, skip * 8, 1, stdin) != 1) abort();
-    } else {
-      short intime[skip * 2];
-      if (fread(intime, skip * 4, 1, stdin) != 1) abort();
-    }
+  /* skip data */
+  int sample_size = input_is_float ? 8 : 4;
+  uint64_t to_skip = skip;
+  while (to_skip) {
+    char intime[4096 * sample_size];
+    int count = to_skip > 4096 ? 4096 : to_skip;
+    if (fread(intime, count * sample_size, 1, stdin) != 1) abort();
+    to_skip -= count;
   }
 
   while (1) {

common/utils/T/tracer/macpdu2wireshark.c

@@ -1,6 +1,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <signal.h>
+#include <unistd.h>
 #include <fcntl.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
@@ -387,6 +389,7 @@ void sr(void *_d, event e)
 #define MAC_NR_HARQID         0x06
 #define MAC_NR_FRAME_SLOT_TAG 0x07
 
+#define NR_FDD_RADIO 1
 #define NR_TDD_RADIO 2
 
 #define NR_DIRECTION_UPLINK   0
@@ -948,6 +951,18 @@ void usage(void)
   exit(1);
 }
 
+volatile int run = 1;
+
+static int sock = -1;
+
+void force_stop(int x)
+{
+  printf("\ngently quit...\n");
+  close(sock);
+  sock = -1;
+  run = 0;
+}
+
 int main(int n, char **v)
 {
   char *database_filename = NULL;
@@ -968,6 +983,9 @@ int main(int n, char **v)
   int live = 0;
   memset(&d, 0, sizeof(ev_data));
 
+  /* write on a socket fails if the other end is closed and we get SIGPIPE */
+  if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) abort();
+
   for (i = 0; i < 65536; i++) {
     d.lte_rnti_to_ueid[i] = -1;
     d.nr_rnti_to_ueid[i] = -1;
@@ -1014,8 +1032,10 @@ int main(int n, char **v)
       perror(input_filename);
       return 1;
     }
-  } else
+  } else {
     in = connect_to(live_ip, live_port);
+    sock = in;
+  }
 
   database = parse_database(database_filename);
   load_config_file(database_filename);
@@ -1121,10 +1141,15 @@ int main(int n, char **v)
     new_thread(receiver, &d);
   }
 
+  /* exit on ctrl+c and ctrl+z */
+  if (signal(SIGQUIT, force_stop) == SIG_ERR) abort();
+  if (signal(SIGINT, force_stop) == SIG_ERR) abort();
+  if (signal(SIGTSTP, force_stop) == SIG_ERR) abort();
+
   OBUF ebuf = {.osize = 0, .omaxsize = 0, .obuf = NULL};
 
   /* read messages */
-  while (1) {
+  while (run) {
     event e;
     e = get_event(in, &ebuf, database);