30 lines
802 B
Go
30 lines
802 B
Go
package params
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import (
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"fmt"
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"net"
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"strings"
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)
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// GetExtraSubnets obtains the CIDR subnets from the comma separated list of the
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// environment variable EXTRA_SUBNETS
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func (r *reader) GetExtraSubnets() (extraSubnets []net.IPNet, err error) {
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s, err := r.envParams.GetEnv("EXTRA_SUBNETS")
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if err != nil {
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return nil, err
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} else if s == "" {
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return nil, nil
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}
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subnets := strings.Split(s, ",")
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for _, subnet := range subnets {
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_, cidr, err := net.ParseCIDR(subnet)
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if err != nil {
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return nil, fmt.Errorf("could not parse subnet %q from environment variable with key EXTRA_SUBNETS: %w", subnet, err)
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} else if cidr == nil {
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return nil, fmt.Errorf("parsing subnet %q resulted in a nil CIDR", subnet)
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}
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extraSubnets = append(extraSubnets, *cidr)
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}
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return extraSubnets, nil
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}
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