Add extra IPs script

add-extra-ips.sh

#!/bin/bash

# Root kontrolü
if [[ $EUID -ne 0 ]]; then
    echo "❌ Lütfen bu scripti root olarak çalıştırın."
    exit 1
fi

# OS tespiti
if [ -f /etc/os-release ]; then
    . /etc/os-release
    OS=$ID
    VERSION=$VERSION_ID
fi

SUPPORTED=false
if [[ "$OS" == "ubuntu" && "$(echo "$VERSION >= 14.04" | bc)" -eq 1 ]]; then
    SUPPORTED=true
elif [[ "$OS" == "debian" ]]; then
    SUPPORTED=true
elif [[ "$OS" == "almalinux" || "$OS" == "rocky" || "$OS" == "centos" ]]; then
    if [[ "$VERSION" =~ ^(7|8|9)(\.[0-9]+)?$ ]]; then
        SUPPORTED=true
    fi
fi

if [[ "$SUPPORTED" != "true" ]]; then
    echo "❌ Unsupported OS: $OS $VERSION"
    exit 1
fi

# IP doğrulama fonksiyonları
is_valid_ipv4() { [[ "$1" =~ ^([0-9]{1,3}\.){3}[0-9]{1,3}/[0-9]{1,2}$ ]]; }
is_valid_ipv6() { [[ "$1" =~ ^([0-9a-fA-F:]+:+)+[0-9a-fA-F]+/[0-9]{1,3}$ ]]; }

# IP girişi
echo "📝 Eklemek istediğiniz IP adreslerini girin (örnek: 192.168.1.10/24 veya 2001:db8::1/64)"
echo "✔️ Girişi bitirmek için Ctrl+D tuşlayın:"
IP_LIST=()
while read -r ip; do
    [[ -z "$ip" ]] && continue
    if is_valid_ipv4 "$ip" || is_valid_ipv6 "$ip"; then
        IP_LIST+=("$ip")
    else
        echo "⚠️ Geçersiz IP atlandı: $ip"
    fi
done

if [[ ${#IP_LIST[@]} -eq 0 ]]; then
    echo "⚠️ Geçerli IP girilmedi. Çıkılıyor."
    exit 1
fi

# Varsayılan arayüz
IFACE=$(ip route | grep default | awk '{print $5}' | head -n1)
if [[ -z "$IFACE" ]]; then
    echo "❌ Ağ arayüzü tespit edilemedi."
    exit 1
fi
echo "🔌 IP'ler $IFACE arayüzüne eklenecek..."

# AlmaLinux/Rocky 8+ ve CentOS 8+ özel durum (NetworkManager kullanıyor)
if [[ ("$OS" == "almalinux" || "$OS" == "rocky" || "$OS" == "centos") && "$VERSION" =~ ^(8|9)(\.[0-9]+)?$ ]]; then
    COUNT=0
    for ip in "${IP_LIST[@]}"; do
        if is_valid_ipv4 "$ip"; then
            nmcli connection modify "$IFACE" +ipv4.addresses "$ip"
            nmcli connection modify "$IFACE" ipv4.method manual
        elif is_valid_ipv6 "$ip"; then
            nmcli connection modify "$IFACE" +ipv6.addresses "$ip"
            nmcli connection modify "$IFACE" ipv6.method manual
        fi
        ((COUNT++))
    done
    nmcli connection up "$IFACE"

# Ubuntu/Debian (netplan kullanan sürümler)
elif [[ "$OS" == "ubuntu" && "$(echo "$VERSION >= 17.10" | bc)" -eq 1 ]] || [[ "$OS" == "debian" && -d "/etc/netplan" ]]; then
    cd /etc/netplan || { echo "❌ /etc/netplan dizini bulunamadı!"; exit 1; }

    # 00-* dosyaları öncelikli ara
    NETPLAN_FILE=$(ls 00-*.yaml 00-*.yml 2>/dev/null | head -1)
    [[ -z "$NETPLAN_FILE" ]] && NETPLAN_FILE=$(ls *.yaml *.yml 2>/dev/null | head -1)

    if [[ -z "$NETPLAN_FILE" ]]; then
        NETPLAN_FILE="99-extra-ips.yaml"
        echo "📄 Yeni netplan dosyası oluşturuluyor: $NETPLAN_FILE"
    else
        echo "📄 Mevcut netplan dosyası düzenleniyor: $NETPLAN_FILE"
    fi

    # Yedek al
    [[ -f "$NETPLAN_FILE" ]] && cp "$NETPLAN_FILE" "$NETPLAN_FILE.bak.$(date +%s)"

    # --- DÜZELTİLEN KISIM ---
    # Mevcut IP'leri oku – yalnızca CIDR içeren satırlar alınır
    EXISTING_IPS=$(grep -A 20 "^ *addresses:" "$NETPLAN_FILE" \
                   | grep "^\s*-" \
                   | grep '/' \
                   | sed 's/^\s*-\s*//')

    # Gateway ve nameserver bilgileri
    GATEWAY=$(grep "gateway4:" "$NETPLAN_FILE" | awk '{print $2}')
    if grep -q "nameservers:" "$NETPLAN_FILE"; then
        NAMESERVERS=$(grep -A 10 "nameservers:" "$NETPLAN_FILE" \
                      | grep "^\s*-" \
                      | sed 's/^\s*-\s*//')
        HAS_NAMESERVERS=true
    else
        HAS_NAMESERVERS=false
    fi
    # --- /DÜZELTİLEN KISIM ---

    # Yeni netplan dosyasını yaz
    cat > "$NETPLAN_FILE" <<EOF
# Generated by IP add script
network:
  ethernets:
    $IFACE:
      addresses:
EOF

    # Eski + yeni IP'leri ekle
    [[ -n "$EXISTING_IPS" ]] && while read -r old; do
        [[ -n "$old" ]] && echo "        - $old" >> "$NETPLAN_FILE"
    done <<< "$EXISTING_IPS"

    for ip in "${IP_LIST[@]}"; do
        echo "        - $ip" >> "$NETPLAN_FILE"
    done

    [[ -n "$GATEWAY" ]] && echo "      gateway4: $GATEWAY" >> "$NETPLAN_FILE"

    if [[ "$HAS_NAMESERVERS" == "true" && -n "$NAMESERVERS" ]]; then
        echo "      nameservers:" >> "$NETPLAN_FILE"
        echo "        addresses:" >> "$NETPLAN_FILE"
        while read -r ns; do
            [[ -n "$ns" ]] && echo "          - $ns" >> "$NETPLAN_FILE"
        done <<< "$NAMESERVERS"
        echo "        search: []" >> "$NETPLAN_FILE"
    fi

    echo "  version: 2" >> "$NETPLAN_FILE"

# Ubuntu/Debian eski yapı
elif [[ "$OS" == "ubuntu" || "$OS" == "debian" ]]; then
    IFACE_FILE="/etc/network/interfaces.d/$IFACE.cfg"
    cp "$IFACE_FILE" "$IFACE_FILE.bak.$(date +%s)" 2>/dev/null
    cat > "$IFACE_FILE" <<EOF
auto $IFACE
iface $IFACE inet manual
EOF
    for ip in "${IP_LIST[@]}"; do
        if is_valid_ipv4 "$ip"; then
            echo "up ip addr add $ip dev $IFACE" >> "$IFACE_FILE"
        elif is_valid_ipv6 "$ip"; then
            echo "up ip -6 addr add $ip dev $IFACE" >> "$IFACE_FILE"
        fi
    done

# RHEL/CentOS/AlmaLinux 7 klasik yapı
else
    IFCFG="/etc/sysconfig/network-scripts/ifcfg-$IFACE"
    cp "$IFCFG" "$IFCFG.bak.$(date +%s)" 2>/dev/null
    COUNT=0
    for ip in "${IP_LIST[@]}"; do
        if is_valid_ipv4 "$ip"; then
            echo "IPADDR$COUNT=${ip%/*}" >> "$IFCFG"
            echo "PREFIX$COUNT=${ip#*/}" >> "$IFCFG"
        elif is_valid_ipv6 "$ip"; then
            echo "IPV6ADDR$COUNT=$ip" >> "$IFCFG"
        fi
        ((COUNT++))
    done
fi

# Ağ servisini yeniden başlat
echo "🔄 Ağ servisi yeniden başlatılıyor..."
if [[ "$OS" == "ubuntu" && "$(echo "$VERSION >= 17.10" | bc)" -eq 1 ]] || [[ "$OS" == "debian" && -d "/etc/netplan" ]]; then
    echo "🔧 Netplan uygulanıyor..."
    netplan apply
elif [[ "$OS" == "ubuntu" || "$OS" == "debian" ]]; then
    echo "🔧 Ağ servisi yeniden başlatılıyor (legacy)..."
    systemctl restart networking || { ifdown "$IFACE"; ifup "$IFACE"; }
elif [[ "$OS" =~ ^(centos|rocky|almalinux)$ && "$VERSION" =~ ^7(\.[0-9]+)?$ ]]; then
    echo "🔧 network.service yeniden başlatılıyor..."
    systemctl restart network
elif [[ ("$OS" == "rocky" || "$OS" == "almalinux" || "$OS" == "centos") && "$VERSION" =~ ^(8|9)(\.[0-9]+)?$ ]]; then
    echo "🔧 NetworkManager yeniden başlatılıyor..."
    systemctl reload NetworkManager || systemctl restart NetworkManager
else
    echo "⚠️ Ağ servisi elle yeniden başlatılmalı."
fi

# Sonuç
echo "✅ Eklenen IP adresleri:"
for ip in "${IP_LIST[@]}"; do
    echo " - $ip"
done

Usage

Method 1: Here Document (Recommended)

Paste multiple IPs directly in the terminal:

./add-extra-ips.sh - <<'EOF'
192.168.1.10
192.168.1.11
192.168.1.12
192.168.1.13
EOF

With custom subnet mask (e.g., /25):

./add-extra-ips.sh -m 25 - <<'EOF'
192.168.1.10
192.168.1.11
192.168.1.12
EOF

Method 2: Text File

Create a file with IP addresses (one per line):

cat > ips.txt <<'EOF'
192.168.1.10
192.168.1.11
192.168.1.12
192.168.1.13
EOF

Then run:

./add-extra-ips.sh -f ips.txt

With custom subnet mask:

./add-extra-ips.sh -m 25 -f ips.txt

Options

Option	Description
-m, --mask	Subnet mask (default: 24)
-i, --iface	Network interface (default: auto-detect)
-f, --file	Read IPs from file
-h, --help	Show help message