T tracer macpdu2wireshark: add UE id

There was a problem with several UEs in the wireshark log. It seems that
wireshark needs the UE id otherwise it gets confused and sees retransmissions
where it's just another UE connecting and doing the same as a previous
UE.

Let's put kind of a UE id. Each RNTI seen by macpdu2wireshark gets an UE id
assigned the first time it's seen in a trace.

This is a bit hackish but seems to be fine.

We could have added UE_id in all the traces, that is change the T() calls
in the softmodem. It was less work to do it as it is, ie. only touch
macpdu2wireshark.c.

The RAR uses the same UE id all the time, may be a problem. To be refined
if needed.

common/utils/T/tracer/macpdu2wireshark.c

@@ -85,6 +85,15 @@ typedef struct {
   /* runtime vars */
   int cur_mib;
   int cur_sib;
+
+  /* hack to report UE id:
+   * each time we see a rnti, we allocate the next ue_id
+   * (two separate versions for lte and nr)
+   */
+  int lte_rnti_to_ueid[65536];
+  int lte_next_ue_id;
+  int nr_rnti_to_ueid[65536];
+  int nr_next_ue_id;
 } ev_data;
 
 /****************************************************************************/
@@ -108,6 +117,18 @@ void trace_lte(ev_data *d, int direction, int rnti_type, int rnti,
     PUTC(&d->buf, MAC_LTE_RNTI_TAG);
     PUTC(&d->buf, (rnti>>8) & 255);
     PUTC(&d->buf, rnti & 255);
+
+    /* put UE id */
+    if (rnti < 0 || rnti > 65535) { printf("bad rnti!\n"); exit(1); }
+    /* if no UE id allocated for this rnti then allocate the next one */
+    if (d->lte_rnti_to_ueid[rnti] == -1) {
+      d->lte_rnti_to_ueid[rnti] = d->lte_next_ue_id;
+      d->lte_next_ue_id++;
+    }
+
+    PUTC(&d->buf, MAC_LTE_UEID_TAG);
+    PUTC(&d->buf, (d->lte_rnti_to_ueid[rnti]>>8) & 255);
+    PUTC(&d->buf, d->lte_rnti_to_ueid[rnti] & 255);
   }
 
   /* for newer version of wireshark? */
@@ -223,6 +244,7 @@ void sr(void *_d, event e)
 
 #define MAC_NR_PAYLOAD_TAG    0x01
 #define MAC_NR_RNTI_TAG       0x02
+#define MAC_NR_UEID_TAG       0x03
 #define MAC_NR_FRAME_SLOT_TAG 0x07
 
 #define NR_FDD_RADIO 1
@@ -250,6 +272,18 @@ void trace_nr(ev_data *d, int direction, int rnti_type, int rnti,
     PUTC(&d->buf, MAC_NR_RNTI_TAG);
     PUTC(&d->buf, (rnti>>8) & 255);
     PUTC(&d->buf, rnti & 255);
+
+    /* put UE id */
+    if (rnti < 0 || rnti > 65535) { printf("bad rnti!\n"); exit(1); }
+    /* if no UE id allocated for this rnti then allocate the next one */
+    if (d->nr_rnti_to_ueid[rnti] == -1) {
+      d->nr_rnti_to_ueid[rnti] = d->nr_next_ue_id;
+      d->nr_next_ue_id++;
+    }
+
+    PUTC(&d->buf, MAC_NR_UEID_TAG);
+    PUTC(&d->buf, (d->nr_rnti_to_ueid[rnti]>>8) & 255);
+    PUTC(&d->buf, d->nr_rnti_to_ueid[rnti] & 255);
   }
 
 #if 0
@@ -579,6 +613,11 @@ int main(int n, char **v)
   int live = 0;
   memset(&d, 0, sizeof(ev_data));
 
+  for (i = 0; i < 65536; i++) {
+    d.lte_rnti_to_ueid[i] = -1;
+    d.nr_rnti_to_ueid[i] = -1;
+  }
+
   for (i = 1; i < n; i++) {
     if (!strcmp(v[i], "-h") || !strcmp(v[i], "--help")) usage();
     if (!strcmp(v[i], "-d"))         { if(i>n-2)usage(); database_filename = v[++i]; continue; }