Modify the script with a retry logic for a failed test and print summary

This commit inputs several distances at once and obtain the summary of
successful and failed tests. We look for the number of successful tests
that are geater than 0. We do that here since we sometimes dont receive
a response for a telnet command from the rfsim although the command
is applied. This is related to the queing telnet commands in the rfsim.

The script for the distances 50, 100 and 150 are called as follows,

./set-and-verify-distance-prs.sh 50 100 150

The summary can be viewed as follows,
==================== SUMMARY ====================
Total tests run : 3
Successful tests: 3
Failed tests    : 0
=================================================

ci-scripts/scripts/set-and-verify-distance-prs.sh

 #!/bin/bash
 
-die() { echo -e "$@"; exit 1; }
-
-[[ -z "$1" ]] && die "Usage: $0 <distance_in_meters>"
+[[ $# -lt 1 ]] && { echo "Usage: $0 <distance_in_meters...>"; exit 1; }
+DISTANCES=("$@")
 
 IP=192.168.71.150
 PORT=8091
-distance=$1
+NCAT_TIMEOUT=1 #s
+SLEEP_WAIT=4 #s
+MAX_RETRIES=3
 
 set_and_verify_distance() {
   local distance=$1
   echo "Testing PRS ToA estimation for distance: $distance m"
 
-  # it sems that grep returns immediately with this syntax, but not echo | ncat | grep
+  # it seems that grep returns immediately with this syntax, but not echo | ncat | grep
   # so prefer this to receive new distance immediately. We use --idle to keep
   # ncat open for some additional time
-  local setdist_resp="$(grep --max-count 1 new_offset <(echo rfsimu setdistance rfsimu_channel_enB0 $distance | ncat --idle 1 ${IP} ${PORT}))"
+  local setdist_resp="$(grep --max-count 1 new_offset <(echo rfsimu setdistance rfsimu_channel_enB0 $distance | ncat --idle ${NCAT_TIMEOUT} ${IP} ${PORT}))"
   echo "> response: ${setdist_resp}"
-  local gettoa_resp="$(echo ciUE get_max_dl_toa | ncat ${IP} ${PORT} | grep "UE max PRS DL ToA")"
+
+  local gettoa_resp="$(echo "ciUE get_max_dl_toa" | ncat ${IP} ${PORT} | grep "UE max PRS DL ToA")"
   echo "> response: ${gettoa_resp}"
 
-  [[ "$setdist_resp" =~ new_offset\ ([0-9]+) ]] || die "Set ToA extraction failed for distance: $distance m\nLOG: $setdist_resp"
-  local set_toa="${BASH_REMATCH[1]}"
-  
-  [[ "$gettoa_resp" =~ UE\ max\ PRS\ DL\ ToA\ ([0-9]+) ]] || die "Estimated ToA extraction failed for distance: $distance m\nLOG: $gettoa_resp"
-  local est_toa="${BASH_REMATCH[1]}"
-  
-  [[ $set_toa == $est_toa ]] || die "PRS FAILURE for distance: $distance m\nActual ToA = $set_toa, Estimated ToA = $est_toa"
-  
-  echo "PRS SUCCESS for distance: $distance m"
+  [[ -z "$setdist_resp" || -z "$gettoa_resp" ]] && return 1
+
+  # Extract ToA values 
+  [[ "$setdist_resp" =~ new_offset\ ([0-9]+) ]] && local set_toa="${BASH_REMATCH[1]}" || { echo "> Set ToA extraction failed for distance: $distance m"; return 1; }
+
+  [[ "$gettoa_resp" =~ UE\ max\ PRS\ DL\ ToA\ ([0-9]+) ]] && local est_toa="${BASH_REMATCH[1]}" || { echo "> Estimated ToA extraction failed for distance: $distance m"; return 1; }
+
+  # Compare extracted ToA values
+  [[ $set_toa == $est_toa ]] && echo "PRS SUCCESS for distance: $distance m" || { echo "PRS FAILURE for distance: $distance m (Actual ToA=$set_toa, Estimated ToA=$est_toa)" ; return 1; }
+
 }
 
-# Set distance to 0 initially and then set the actual distance
-sleep 4
-set_and_verify_distance 0
+test_distance() {
+  local distance=$1 retries=0
+
+  # retry loop incase we didn't receive the response
+  while (( retries < MAX_RETRIES )); do
+    echo "  Attempt $((retries + 1))/$MAX_RETRIES"
+
+    # Always reset to 0 m before testing target distance
+    if ! set_and_verify_distance 0; then
+      echo " Set distance 0 m failed during attempt $((retries + 1))"
+    else
+      sleep "$SLEEP_WAIT"
+      # Now test the actual target distance
+      if set_and_verify_distance "$distance"; then
+        return 0
+      fi
+    fi
+
+    ((retries++))
+    if (( retries < MAX_RETRIES )); then
+      sleep "$SLEEP_WAIT"
+    else
+      echo " ERROR: No valid response after $MAX_RETRIES retries for distance: $distance m"
+      return 1
+    fi
+  done
+}
+
+num_success=0
+num_fail=0
+
+for d in "${DISTANCES[@]}"; do
+  if test_distance "$d"; then
+    ((num_success++))
+  else
+    ((num_fail++))
+  fi
+  sleep "$SLEEP_WAIT"
+done
+
+# ---- Summary ----
+echo
+echo "==================== SUMMARY ===================="
+echo "Total tests run : ${#DISTANCES[@]}"
+echo "Successful tests: ${num_success}"
+echo "Failed tests    : ${num_fail}"
+echo "================================================="
 
-sleep 4
-set_and_verify_distance $distance
+if [ $num_success -gt 0 ]; then
+  exit 0
+else
+  exit 1
+fi