90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
package reservation
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import (
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"context"
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"errors"
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"log/slog"
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"git.staur.ca/stobbsm/kea-manage/lib/types"
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"github.com/jackc/pgx/v5"
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)
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const insertHostReservation = `INSERT INTO hosts (dhcp_identifier,
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dhcp_identifier_type,
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dhcp4_subnet_id,
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ipv4_address,
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hostname)
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VALUES (DECODE(REPLACE($1, ':', ''), 'hex'), $2, $3, (SELECT ($4::inet - '0.0.0.0'::inet)), $5);`
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const getHostIDWithMacAddr = `SELECT host_id
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FROM hosts
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WHERE dhcp4_subnet_id = $1
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AND dhcp_identifier_type = $2
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AND dhcp_identifier = (DECODE(REPLACE($3, ':', ''), 'hex'));`
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const insertIfNotExists = `INSERT INTO hosts (dhcp_identifier,
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dhcp_identifier_type,
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dhcp4_subnet_id,
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ipv4_address,
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hostname)
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SELECT DECODE(REPLACE($1, ':', ''), 'hex'), $2, $3, (SELECT ($4::inet - '0.0.0.0'::inet)), $5
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WHERE NOT EXISTS (
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SELECT host_id FROM hosts
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WHERE dhcp4_subnet_id = $3
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AND dhcp_identifier_type = $2
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AND dhcp_identifier = DECODE(REPLACE($1, ':', ''), 'hex'));`
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type ReservationV4 struct {
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MacAddr string
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Type int
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SubnetID int
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Ipv4 string
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Hostname string
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}
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func ReserveV4MacAddr(mac string, addr string, hostname string, subnet int) *ReservationV4 {
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r := &ReservationV4{
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MacAddr: mac,
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Type: int(types.MacAddress),
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SubnetID: subnet,
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Ipv4: addr,
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Hostname: hostname,
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}
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return r
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}
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func (r *ReservationV4) check(conn *pgx.Conn) error {
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rows, err := conn.Query(context.Background(), getHostIDWithMacAddr, r.SubnetID, r.Type, r.MacAddr)
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if err != nil {
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slog.Error("error during check query")
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return err
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}
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slog.Info("check result size")
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if rv, _ := rows.Values(); len(rv) > 0 {
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return errors.New("existing record found")
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}
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return nil
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}
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func (r *ReservationV4) Insert(conn *pgx.Conn) error {
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// if err := r.check(conn); err != nil {
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// return err
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// }
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tx, err := conn.Begin(context.Background())
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if err != nil {
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return err
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}
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defer tx.Rollback(context.Background())
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if _, err = tx.Exec(context.Background(), insertIfNotExists, r.MacAddr, r.Type, r.SubnetID, r.Ipv4, r.Hostname); err != nil {
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return err
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}
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if err = tx.Commit(context.Background()); err != nil {
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return err
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}
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return nil
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}
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