Enable V6 Plus Static IP on UDM

configure.sh

#!/bin/sh

# Configure JPIX "v6 Plus" Fixed IP service (IPIP).
# Intended for unattended use (e.g., crontab).
#
# Use --dry-run to preview the changes
#
# Prerequisites: System must already have MAP-E JPIX configured.
#
# Note: Weekly scheduled backup could revert the network settings.
# Disable the backup to allow the change to persist.

set -eu

# ── Parameters ────────────────────────────────────────────────────────
USERNAME="kotei0123456"
PASSWORD="p1a2s3s4"
IPV4_CIDR="8.8.8.8/32"            # static IPv4 in CIDR notation
IPV6_IID="::1:2:3:4"              # IPv6 Interface Identifier (lower 64 bits)
IPV6_REMOTE="2404:9200:225:100::65"  # tunnel remote endpoint (IPv6 or hostname)

STATE_FILE="/data/udapi-config/ubios-udapi-server/ubios-udapi-server.state"
WORKING_FILE="${STATE_FILE}.modified"

# ──────────────────────────────────────────────────────────────────────

DRY_RUN=false
case "${1:-}" in --dry-run) DRY_RUN=true ;; esac

# Split CIDR into address and prefix length.
IPV4_ADDR="${IPV4_CIDR%/*}"
IPV4_PREFIX="${IPV4_CIDR#*/}"

# Create working copy.
cp -p "$STATE_FILE" "$WORKING_FILE"

# Build the serverName payload: IID|IPv6_Remote|IPv4_Address|IPv4_Prefix
SERVER_NAME="${IPV6_IID}|${IPV6_REMOTE}|${IPV4_ADDR}|${IPV4_PREFIX}"

# Apply modifications with jq:
#   1. Change capability from map_e_jpix → ipip_jpix
#   2. Add authentication block with serverName encoding
#   3. Remove 192.0.0.x addresses from all interfaces
jq --indent 1 \
  --arg user "$USERNAME" \
  --arg pass "$PASSWORD" \
  --arg sname "$SERVER_NAME" \
'
  .interfaces |= [
    .[] |
    # Update hb46pp capability and add authentication
    if .ipv6.hb46pp.capability == "map_e_jpix" then
      .ipv6.hb46pp.capability = "ipip_jpix"
      | .ipv6.hb46pp.authentication = {
          username: $user,
          password: $pass,
          serverName: $sname
        }
    else . end
    |
    # Remove 192.0.0.x addresses
    if .addresses then
      .addresses |= [ .[] | select(.cidr == null or (.cidr | startswith("192.0.0.") | not)) ]
    else . end
  ]
' "$WORKING_FILE" > "${WORKING_FILE}.tmp" && mv "${WORKING_FILE}.tmp" "$WORKING_FILE"

# Dry run: show diff and exit without applying.
if [ "$DRY_RUN" = true ]; then
  diff -u "$STATE_FILE" "$WORKING_FILE" || true
  rm -f "$WORKING_FILE"
  exit 0
fi

# Apply changes.
ubios-udapi-client put /system/ubios/udm/configuration "@${WORKING_FILE}"