(command.CommandList
  children: [
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:basedir)
          op: assign_op.Equal
          rhs: 
            {
              (command_sub
                left_token: <Id.Left_Backtick '`'>
                child: (C {<dirname>} {($ Id.VSub_Number '$0')})
              )
            }
          spids: [18]
        )
      ]
    )
    (C {<source>} {(${ Id.VSub_Name basedir) <'/functions.sh'>})
    (C {<root_check_run_with_sudo>} {(DQ ($ Id.VSub_At '$@'))})
    (C {<source>} {(${ Id.VSub_Name basedir) <'/parameters.sh'>})
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (C {<Id.Lit_LBracket '['>} {<-z>} {(DQ ($ Id.VSub_DollarName '$DEST_IP'))} 
                      {<Id.Lit_RBracket ']'>}
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (command.AndOr
              ops: [Id.Op_DAmp Id.Op_DPipe]
              children: [
                (C {<Id.Lit_LBracket '['>} {<-z>} {(DQ ($ Id.VSub_DollarName '$IP6'))} 
                  {<Id.Lit_RBracket ']'>}
                )
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:DEST_IP)
                      op: assign_op.Equal
                      rhs: {(DQ <198.18.0.42>)}
                      spids: [91]
                    )
                  ]
                )
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:DEST_IP)
                      op: assign_op.Equal
                      rhs: {(DQ <'FD00::1'>)}
                      spids: [98]
                    )
                  ]
                )
              ]
            )
          ]
          spids: [63 76]
        )
      ]
    )
    (command.AndOr
      ops: [Id.Op_DAmp]
      children: [
        (C {<Id.Lit_LBracket '['>} {<-z>} {(DQ ($ Id.VSub_DollarName '$CLONE_SKB'))} 
          {<Id.Lit_RBracket ']'>}
        )
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:CLONE_SKB)
              op: assign_op.Equal
              rhs: {(DQ <0>)}
              spids: [117]
            )
          ]
        )
      ]
    )
    (command.AndOr
      ops: [Id.Op_DAmp Id.Op_DAmp]
      children: [
        (C {<Id.Lit_LBracket '['>} {<-z>} {(DQ ($ Id.VSub_DollarName '$DST_MAC'))} 
          {<Id.Lit_RBracket ']'>}
        )
        (C {<usage>})
        (C {<err>} {<2>} {(DQ <'Must specify -m dst_mac'>)})
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:DELAY)
          op: assign_op.Equal
          rhs: {(DQ <0>)}
          spids: [153]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:COUNT)
          op: assign_op.Equal
          rhs: {(DQ <100000>)}
          spids: [161]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:UDP_MIN)
          op: assign_op.Equal
          rhs: {<9>}
          spids: [173]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:UDP_MAX)
          op: assign_op.Equal
          rhs: {<109>}
          spids: [176]
        )
      ]
    )
    (C {<pg_ctrl>} {(DQ <reset>)})
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:thread)
          op: assign_op.Equal
          rhs: {<0>}
          spids: [196]
        )
      ]
    )
    (C {<pg_thread>} {($ Id.VSub_DollarName '$thread')} {(DQ <rem_device_all>)})
    (C {<pg_thread>} {($ Id.VSub_DollarName '$thread')} {(DQ <add_device>)} 
      {($ Id.VSub_DollarName '$DEV')}
    )
    (C {<pg_set>} {($ Id.VSub_DollarName '$DEV')} {(DQ <'count '> ($ Id.VSub_DollarName '$COUNT'))})
    (C {<pg_set>} {($ Id.VSub_DollarName '$DEV')} 
      {(DQ <'clone_skb '> ($ Id.VSub_DollarName '$CLONE_SKB'))}
    )
    (C {<pg_set>} {($ Id.VSub_DollarName '$DEV')} {(DQ <'pkt_size '> ($ Id.VSub_DollarName '$PKT_SIZE'))})
    (C {<pg_set>} {($ Id.VSub_DollarName '$DEV')} {(DQ <'delay '> ($ Id.VSub_DollarName '$DELAY'))})
    (C {<pg_set>} {($ Id.VSub_DollarName '$DEV')} {(DQ <'flag NO_TIMESTAMP'>)})
    (C {<pg_set>} {($ Id.VSub_DollarName '$DEV')} {(DQ <'dst_mac '> ($ Id.VSub_DollarName '$DST_MAC'))})
    (C {<pg_set>} {($ Id.VSub_DollarName '$DEV')} 
      {(DQ <dst> ($ Id.VSub_DollarName '$IP6') <' '> ($ Id.VSub_DollarName '$DEST_IP'))}
    )
    (C {<pg_set>} {($ Id.VSub_DollarName '$DEV')} {(DQ <'flag UDPSRC_RND'>)})
    (C {<pg_set>} {($ Id.VSub_DollarName '$DEV')} 
      {(DQ <'udp_src_min '> ($ Id.VSub_DollarName '$UDP_MIN'))}
    )
    (C {<pg_set>} {($ Id.VSub_DollarName '$DEV')} 
      {(DQ <'udp_src_max '> ($ Id.VSub_DollarName '$UDP_MAX'))}
    )
    (command.Simple
      words: [{<echo>} {(DQ <'Running... ctrl^C to stop'>)}]
      redirects: [(redir op:<Id.Redir_GreatAnd '>&'> loc:(redir_loc.Fd fd:1) arg:{<2>})]
      do_fork: T
    )
    (C {<pg_ctrl>} {(DQ <start>)})
    (command.Simple
      words: [{<echo>} {(DQ <Done>)}]
      redirects: [(redir op:<Id.Redir_GreatAnd '>&'> loc:(redir_loc.Fd fd:1) arg:{<2>})]
      do_fork: T
    )
    (C {<echo>} {(DQ <'Result device: '> ($ Id.VSub_DollarName '$DEV'))})
    (C {<cat>} {<'/proc/net/pktgen/'> ($ Id.VSub_DollarName '$DEV')})
  ]
)