int FUN_0040fb5c(undefined4 param_1,uint param_2,int param_3,uint *param_4)

{

  undefined4 uVar1;

  undefined4 uVar2;

  int iVar3;

  char *pcVar4;

  uint uVar5;

  uint local_40;

  uint local_3c;

  uint local_38;

  uint local_34;

  uint local_30;

  uint local_2c;

  uint local_28;

  uVar5 = param_4[6];

  local_40 = *param_4;

  local_3c = param_4[1];

  local_34 = param_4[3];

  local_38 = param_4[2];

  local_30 = param_4[4];

  local_2c = param_4[5];

  local_28 = uVar5;

  if (uVar5 < 0x81) {

    prefix6_mask(&local_38,uVar5);

    if ((((param_4[2] != local_38) || (param_4[3] != local_34)) || (param_4[4] != local_30)) ||

       (param_4[5] != local_2c)) {

      uVar1 = in6addr2str(param_4 + 2,0);

      uVar5 = param_4[6];

      uVar2 = in6addr2str(&local_38,0);

      dprintf(4,"add_prefix","prefix %s/%d for %s has a trailing garbage.  It should be %s/%d",uVar1

              ,uVar5,param_2,uVar2,local_28);

    }

    if ((((char)local_38 != -1) && ((local_38 & 0xc0ff) != 0x80fe)) &&

       ((local_38 & 0xc0ff) != 0xc0fe)) {

      iVar3 = dhcp6_find_listval(param_1,param_3,&local_40,0);

      if (iVar3 == 0) {

        if ((local_3c == 0xffffffff) || ((local_40 != 0xffffffff && (local_40 <= local_3c)))) {

          iVar3 = dhcp6_add_listval(param_1,param_3,&local_40,0);

          return -(uint)(iVar3 == 0);

        }

        if (param_3 != 5) {

          uVar1 = in6addr2str(&local_38,0);

          dprintf(5,"add_prefix","%s has larger preferred lifetime than valid lifetime",uVar1);

          return -1;

        }

        uVar1 = in6addr2str(&local_38,0);

        pcVar4 = "%s/%d has larger preferred lifetime than valid lifetime";

        param_2 = local_28;

      }

      else if (param_3 == 5) {

        uVar1 = in6addr2str(&local_38,0);

        pcVar4 = "duplicated prefix: %s/%d for %s";

        param_2 = local_28;

      }

      else {

        uVar1 = in6addr2str(&local_38,0);

        pcVar4 = "duplicated address: %s for %s";

      }

      dprintf(5,"add_prefix",pcVar4,uVar1,param_2);

      return -1;

    }

    uVar5 = in6addr2str(&local_38,0);

    pcVar4 = "invalid prefix address: %s";

  }

  else {

    pcVar4 = "invalid prefix: %d";

  }

  dprintf(3,"add_prefix",pcVar4,uVar5);

  return -1;

}