nuno revised this gist 1 month ago. Go to revision
1 file changed, 106 insertions
gistfile1.txt(file created)
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| 1 | + | #!/usr/bin/env bash | |
| 2 | + | ||
| 3 | + | # ============================================ | |
| 4 | + | # IP Assignment | |
| 5 | + | # ============================================ | |
| 6 | + | ||
| 7 | + | function ip::assigned() { | |
| 8 | + | grep -h "^Address" "$(ctx::clients)"/*.conf 2>/dev/null \ | |
| 9 | + | | awk '{print $3}' \ | |
| 10 | + | | cut -d'/' -f1 | |
| 11 | + | } | |
| 12 | + | ||
| 13 | + | function ip::is_assigned() { | |
| 14 | + | local candidate="$1" | |
| 15 | + | ip::assigned | grep -q "^${candidate}$" | |
| 16 | + | } | |
| 17 | + | ||
| 18 | + | function ip::next_for_type() { | |
| 19 | + | local type="$1" | |
| 20 | + | local subnet | |
| 21 | + | subnet=$(config::subnet_for "$type") | |
| 22 | + | ||
| 23 | + | if [[ -z "$subnet" ]]; then | |
| 24 | + | log::error "Unknown device type: ${type}" | |
| 25 | + | return 1 | |
| 26 | + | fi | |
| 27 | + | ||
| 28 | + | for i in $(seq 1 254); do | |
| 29 | + | local candidate="${subnet}.${i}" | |
| 30 | + | if ! ip::is_assigned "$candidate"; then | |
| 31 | + | echo "$candidate" | |
| 32 | + | return 0 | |
| 33 | + | fi | |
| 34 | + | done | |
| 35 | + | ||
| 36 | + | log::error "No available IPs in subnet ${subnet}.0/24" | |
| 37 | + | return 1 | |
| 38 | + | } | |
| 39 | + | ||
| 40 | + | # ip::next_for_subnet <cidr> | |
| 41 | + | # Finds the next unassigned host IP within a CIDR. | |
| 42 | + | # Replaces ip::next_for_type for the subnet-aware allocation path. | |
| 43 | + | function ip::next_for_subnet() { | |
| 44 | + | local cidr="${1:-}" | |
| 45 | + | ||
| 46 | + | if [[ -z "$cidr" ]]; then | |
| 47 | + | log::error "No subnet CIDR provided for IP allocation" | |
| 48 | + | return 1 | |
| 49 | + | fi | |
| 50 | + | ||
| 51 | + | local prefix | |
| 52 | + | prefix=$(subnet::prefix "$cidr") | |
| 53 | + | ||
| 54 | + | local candidate | |
| 55 | + | for i in $(subnet::host_range "$cidr"); do | |
| 56 | + | candidate="${prefix}.${i}" | |
| 57 | + | ip::is_assigned "$candidate" || { echo "$candidate"; return 0; } | |
| 58 | + | done | |
| 59 | + | ||
| 60 | + | log::error "No available IPs in subnet ${cidr}" | |
| 61 | + | return 1 | |
| 62 | + | } | |
| 63 | + | ||
| 64 | + | ||
| 65 | + | # ============================================ | |
| 66 | + | # Validation | |
| 67 | + | # ============================================ | |
| 68 | + | ||
| 69 | + | function ip::is_valid() { | |
| 70 | + | local ip="$1" | |
| 71 | + | [[ "$ip" =~ ^([0-9]{1,3}\.){3}[0-9]{1,3}(/([0-9]|[1-2][0-9]|3[0-2]))?$ ]] | |
| 72 | + | } | |
| 73 | + | ||
| 74 | + | function ip::is_cidr() { | |
| 75 | + | [[ "$1" == *"/"* ]] | |
| 76 | + | } | |
| 77 | + | ||
| 78 | + | # ip::is_valid_for_subnet <cidr> <ip> | |
| 79 | + | # Convenience wrapper — validates an IP against a specific subnet. | |
| 80 | + | # Delegates to subnet::ip_valid_for which handles all the checks. | |
| 81 | + | function ip::is_valid_for_subnet() { | |
| 82 | + | local cidr="${1:-}" ip="${2:-}" | |
| 83 | + | subnet::ip_valid_for "$cidr" "$ip" | |
| 84 | + | } | |
| 85 | + | ||
| 86 | + | # ip::require_valid_for_subnet <cidr> <ip> | |
| 87 | + | # Errors and returns 1 if the IP is not valid for the subnet. | |
| 88 | + | # Used when a manual --ip override is provided. | |
| 89 | + | function ip::require_valid_for_subnet() { | |
| 90 | + | local cidr="${1:-}" ip="${2:-}" | |
| 91 | + | subnet::require_ip_valid_for "$cidr" "$ip" | |
| 92 | + | } | |
| 93 | + | ||
| 94 | + | function ip::validate() { | |
| 95 | + | local ip="$1" | |
| 96 | + | if ! ip::is_valid "$ip"; then | |
| 97 | + | log::error "Invalid IP or CIDR: ${ip}" | |
| 98 | + | return 1 | |
| 99 | + | fi | |
| 100 | + | return 0 | |
| 101 | + | } | |
| 102 | + | ||
| 103 | + | function ip::require_valid() { | |
| 104 | + | local ip="$1" | |
| 105 | + | ip::validate "$ip" || exit 1 | |
| 106 | + | } | |
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