Add SSH monitoring server installer #3
2 changed files with 78 additions and 21 deletions
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@ -196,6 +196,8 @@ readonly TOKENS_DIR="${STATE_DIR}/tokens"
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readonly HUB_CONFIG="${STATE_DIR}/hub.conf"
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readonly HUB_PRIVATE_KEY="${STATE_DIR}/hub.key"
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readonly LINKS_FILE="${STATE_DIR}/links"
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readonly AUDIT_FILE="${STATE_DIR}/audit.jsonl"
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readonly VERSION_FILE="${STATE_DIR}/policy.version"
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readonly WG_INTERFACE="smm0"
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readonly WG_CONFIG="/etc/wireguard/${WG_INTERFACE}.conf"
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readonly NFT_TABLE="ochenstarik_smm"
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@ -214,6 +216,26 @@ node_file() { printf '%s/%s.node' "$NODES_DIR" "$1"; }
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node_value() { config_value "$2" "$(node_file "$1")"; }
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node_exists() { [[ -f "$(node_file "$1")" ]]; }
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next_policy_version() {
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local version=0 tmp
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[[ ! -r "$VERSION_FILE" ]] || read -r version < "$VERSION_FILE"
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[[ "$version" =~ ^[0-9]+$ ]] || version=0
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version=$((version + 1))
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tmp="$(mktemp)"
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printf '%s\n' "$version" > "$tmp"
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install -m 0600 -o root -g root "$tmp" "$VERSION_FILE"
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rm -f -- "$tmp"
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printf '%s' "$version"
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}
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audit_link() {
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local action="$1" state="$2" source="$3" target="$4" protocol="$5" port="$6" version="$7"
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printf '{"time":"%s","action":"%s","state":"%s","source":"%s","target":"%s","protocol":"%s","port":%s,"version":%s}\n' \
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"$(date -u +%Y-%m-%dT%H:%M:%SZ)" "$action" "$state" "$source" "$target" "$protocol" "$port" "$version" \
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>> "$AUDIT_FILE"
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chmod 0600 "$AUDIT_FILE"
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}
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render_wireguard_config() {
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local tmp name file public_key address
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tmp="$(mktemp)"
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@ -375,11 +397,11 @@ node_enroll() {
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}
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prune_links() {
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local tmp source target cidr protocol port expires now target_ip
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local tmp source target cidr protocol port expires version now target_ip
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tmp="$(mktemp)"
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now="$(date +%s)"
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if [[ -f "$LINKS_FILE" ]]; then
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while read -r source target cidr protocol port expires extra; do
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while read -r source target cidr protocol port expires version extra; do
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[[ -z "${extra:-}" ]] || continue
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valid_name "$source" && valid_name "$target" || continue
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node_exists "$source" && node_exists "$target" || continue
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@ -388,8 +410,12 @@ prune_links() {
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[[ "$protocol" == tcp || "$protocol" == udp ]] || continue
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[[ "$port" =~ ^[0-9]+$ ]] && (( port >= 1 && port <= 65535 )) || continue
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[[ "$expires" =~ ^[0-9]+$ ]] || continue
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(( expires == 0 || expires > now )) || continue
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printf '%s %s %s %s %s %s\n' "$source" "$target" "$cidr" "$protocol" "$port" "$expires" >> "$tmp"
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[[ "${version:-}" =~ ^[0-9]+$ ]] || version=0
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if (( expires != 0 && expires <= now )); then
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audit_link expire Expired "$source" "$target" "$protocol" "$port" "$version"
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continue
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fi
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printf '%s %s %s %s %s %s %s\n' "$source" "$target" "$cidr" "$protocol" "$port" "$expires" "$version" >> "$tmp"
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done < "$LINKS_FILE"
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fi
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sort -u -o "$tmp" "$tmp"
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@ -398,15 +424,16 @@ prune_links() {
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}
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restore_firewall() {
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local tmp source target cidr protocol port expires source_ip
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local tmp body source target cidr protocol port expires version source_ip
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prune_links
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tmp="$(mktemp)"
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body="$(mktemp)"
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{
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printf 'table inet %s {\n' "$NFT_TABLE"
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printf ' chain forward {\n'
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printf ' type filter hook forward priority 10; policy accept;\n'
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printf ' iifname "%s" oifname "%s" ct state established,related accept\n' "$WG_INTERFACE" "$WG_INTERFACE"
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while read -r source target cidr protocol port expires; do
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while read -r source target cidr protocol port expires version; do
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[[ -n "$source" ]] || continue
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source_ip="$(node_value "$source" ADDRESS)"
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printf ' iifname "%s" oifname "%s" ip saddr %s ip daddr %s %s dport %s accept\n' \
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@ -414,16 +441,22 @@ restore_firewall() {
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done < "$LINKS_FILE"
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printf ' iifname "%s" oifname "%s" drop\n' "$WG_INTERFACE" "$WG_INTERFACE"
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printf ' }\n}\n'
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} > "$tmp"
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nft --check -f "$tmp"
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nft delete table inet "$NFT_TABLE" >/dev/null 2>&1 || true
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nft -f "$tmp"
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} > "$body"
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if nft list table inet "$NFT_TABLE" >/dev/null 2>&1; then
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printf 'delete table inet %s\n' "$NFT_TABLE" > "$tmp"
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fi
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cat "$body" >> "$tmp"
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rm -f -- "$body"
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if ! nft --check -f "$tmp" || ! nft -f "$tmp"; then
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rm -f -- "$tmp"
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return 1
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fi
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rm -f -- "$tmp"
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}
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link_connect() {
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local source="$1" target="$2" protocol="$3" port="$4" ttl_minutes="$5"
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local target_ip cidr expires tmp
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local target_ip cidr expires version tmp
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valid_name "$source" && valid_name "$target" || die "Некорректное имя узла"
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[[ "$source" != "$target" ]] || die "Источник и назначение совпадают"
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node_exists "$source" || die "Узел $source не найден"
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@ -436,24 +469,33 @@ link_connect() {
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cidr="${target_ip}/32"
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expires=0
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(( ttl_minutes == 0 )) || expires=$(( $(date +%s) + ttl_minutes * 60 ))
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version="$(next_policy_version)"
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audit_link connect Connecting "$source" "$target" "$protocol" "$port" "$version"
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tmp="$(mktemp)"
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if [[ -f "$LINKS_FILE" ]]; then
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awk -v source="$source" -v target="$target" -v protocol="$protocol" -v port="$port" \
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'!($1 == source && $2 == target && $4 == protocol && $5 == port)' "$LINKS_FILE" > "$tmp"
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fi
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printf '%s %s %s %s %s %s\n' "$source" "$target" "$cidr" "$protocol" "$port" "$expires" >> "$tmp"
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printf '%s %s %s %s %s %s %s\n' "$source" "$target" "$cidr" "$protocol" "$port" "$expires" "$version" >> "$tmp"
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sort -u -o "$tmp" "$tmp"
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install -m 0600 -o root -g root "$tmp" "$LINKS_FILE"
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rm -f -- "$tmp"
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restore_firewall
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if ! restore_firewall; then
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audit_link connect Failed "$source" "$target" "$protocol" "$port" "$version"
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die "Не удалось применить nftables policy"
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fi
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audit_link connect Active "$source" "$target" "$protocol" "$port" "$version"
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log "Связь $source → $target: $protocol/$port включена"
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printf 'LINK_STATE=Active|VERSION=%s\n' "$version"
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}
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link_disconnect() {
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local source="$1" target="$2" protocol="$3" port="$4" tmp
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local source="$1" target="$2" protocol="$3" port="$4" version tmp
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valid_name "$source" && valid_name "$target" || die "Некорректное имя узла"
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[[ "$protocol" == tcp || "$protocol" == udp ]] || die "Протокол должен быть tcp или udp"
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[[ "$port" =~ ^[0-9]+$ ]] && (( port >= 1 && port <= 65535 )) || die "Некорректный порт"
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version="$(next_policy_version)"
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audit_link disconnect Disconnecting "$source" "$target" "$protocol" "$port" "$version"
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tmp="$(mktemp)"
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if [[ -f "$LINKS_FILE" ]]; then
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awk -v source="$source" -v target="$target" -v protocol="$protocol" -v port="$port" \
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@ -461,8 +503,13 @@ link_disconnect() {
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fi
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install -m 0600 -o root -g root "$tmp" "$LINKS_FILE"
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rm -f -- "$tmp"
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restore_firewall
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if ! restore_firewall; then
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audit_link disconnect Failed "$source" "$target" "$protocol" "$port" "$version"
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die "Не удалось применить отключение в nftables"
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fi
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audit_link disconnect Disabled "$source" "$target" "$protocol" "$port" "$version"
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log "Связь $source → $target: $protocol/$port отключена"
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printf 'LINK_STATE=Disabled|VERSION=%s\n' "$version"
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}
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remove_node() {
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@ -504,13 +551,13 @@ list_nodes() {
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}
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list_links() {
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local source target cidr protocol port expires
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local source target cidr protocol port expires version
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prune_links
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[[ -f "$LINKS_FILE" ]] || return 0
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while read -r source target cidr protocol port expires; do
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while read -r source target cidr protocol port expires version; do
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[[ -n "$source" && -n "$target" ]] || continue
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printf 'LINK=%s|%s|%s|%s|%s|%s|enabled\n' \
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"$source" "$target" "$cidr" "$protocol" "$port" "$expires"
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printf 'LINK=%s|%s|%s|%s|%s|%s|Active|%s\n' \
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"$source" "$target" "$cidr" "$protocol" "$port" "$expires" "$version"
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done < "$LINKS_FILE"
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}
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@ -637,6 +684,10 @@ install_hub() {
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chmod 0600 "$HUB_CONFIG"
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touch "$LINKS_FILE"
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chmod 0600 "$LINKS_FILE"
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touch "${MESH_DIR}/audit.jsonl"
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chmod 0600 "${MESH_DIR}/audit.jsonl"
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[[ -f "${MESH_DIR}/policy.version" ]] || printf '0\n' > "${MESH_DIR}/policy.version"
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chmod 0600 "${MESH_DIR}/policy.version"
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create_hub_helper
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"$HUB_HELPER" render
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"$HUB_HELPER" firewall-restore
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@ -58,14 +58,17 @@ printf 'legacy-policy home\n' > "$state/links"
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PATH="$mock_bin:$PATH" NFT_CAPTURE="$nft_capture" \
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"$helper" link-connect ai-agent home tcp 2222 120
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read -r source target cidr protocol port expires < "$state/links"
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read -r source target cidr protocol port expires version < "$state/links"
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[[ "$source" == ai-agent ]]
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[[ "$target" == home ]]
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[[ "$cidr" == 10.77.0.3/32 ]]
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[[ "$protocol" == tcp ]]
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[[ "$port" == 2222 ]]
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(( expires > $(date +%s) ))
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[[ "$version" =~ ^[0-9]+$ ]]
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grep -Fq 'ip saddr 10.77.0.2 ip daddr 10.77.0.3/32 tcp dport 2222 accept' "$nft_capture"
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grep -Fq '"state":"Connecting"' "$state/audit.jsonl"
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grep -Fq '"state":"Active"' "$state/audit.jsonl"
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if PATH="$mock_bin:$PATH" NFT_CAPTURE="$nft_capture" \
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"$helper" link-connect ai-agent home tcp 70000 120 >/dev/null 2>&1; then
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@ -73,13 +76,16 @@ if PATH="$mock_bin:$PATH" NFT_CAPTURE="$nft_capture" \
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exit 1
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fi
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printf 'ai-agent home 10.77.0.3/32 udp 53 1\n' >> "$state/links"
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printf 'ai-agent home 10.77.0.3/32 udp 53 1 99\n' >> "$state/links"
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PATH="$mock_bin:$PATH" NFT_CAPTURE="$nft_capture" "$helper" firewall-restore
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[[ "$(wc -l < "$state/links")" -eq 1 ]]
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PATH="$mock_bin:$PATH" NFT_CAPTURE="$nft_capture" \
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"$helper" link-disconnect ai-agent home tcp 2222
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[[ ! -s "$state/links" ]]
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grep -Fq '"state":"Expired"' "$state/audit.jsonl"
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grep -Fq '"state":"Disconnecting"' "$state/audit.jsonl"
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grep -Fq '"state":"Disabled"' "$state/audit.jsonl"
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if grep -Fq 'dport 2222 accept' "$nft_capture"; then
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echo 'Disconnected policy remained in nftables.' >&2
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exit 1
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